root / linux-user / elfload.c @ 60dcbcb5
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/* This is the Linux kernel elf-loading code, ported into user space */
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#include <sys/time.h> |
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#include <sys/param.h> |
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#include <stdio.h> |
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#include <sys/types.h> |
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#include <fcntl.h> |
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#include <errno.h> |
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#include <unistd.h> |
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#include <sys/mman.h> |
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#include <sys/resource.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <time.h> |
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#include "qemu.h" |
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#include "disas.h" |
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#ifdef _ARCH_PPC64
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#undef ARCH_DLINFO
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#undef ELF_PLATFORM
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#undef ELF_HWCAP
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#undef ELF_CLASS
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#undef ELF_DATA
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#undef ELF_ARCH
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#endif
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#define ELF_OSABI ELFOSABI_SYSV
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/* from personality.h */
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/*
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* Flags for bug emulation.
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*
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* These occupy the top three bytes.
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*/
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enum {
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ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */ |
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FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to |
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descriptors (signal handling) */
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MMAP_PAGE_ZERO = 0x0100000,
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ADDR_COMPAT_LAYOUT = 0x0200000,
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READ_IMPLIES_EXEC = 0x0400000,
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ADDR_LIMIT_32BIT = 0x0800000,
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SHORT_INODE = 0x1000000,
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WHOLE_SECONDS = 0x2000000,
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STICKY_TIMEOUTS = 0x4000000,
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ADDR_LIMIT_3GB = 0x8000000,
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}; |
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/*
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* Personality types.
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*
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* These go in the low byte. Avoid using the top bit, it will
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* conflict with error returns.
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*/
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enum {
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PER_LINUX = 0x0000,
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PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
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PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
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PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
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PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
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PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE,
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PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
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PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
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PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
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PER_BSD = 0x0006,
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PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
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PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
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PER_LINUX32 = 0x0008,
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PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
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PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */ |
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PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */ |
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PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */ |
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PER_RISCOS = 0x000c,
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PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
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PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
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PER_OSF4 = 0x000f, /* OSF/1 v4 */ |
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PER_HPUX = 0x0010,
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PER_MASK = 0x00ff,
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}; |
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/*
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* Return the base personality without flags.
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*/
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#define personality(pers) (pers & PER_MASK)
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/* this flag is uneffective under linux too, should be deleted */
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#ifndef MAP_DENYWRITE
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#define MAP_DENYWRITE 0 |
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#endif
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/* should probably go in elf.h */
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#ifndef ELIBBAD
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#define ELIBBAD 80 |
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#endif
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#ifdef TARGET_WORDS_BIGENDIAN
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#define ELF_DATA ELFDATA2MSB
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#else
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#define ELF_DATA ELFDATA2LSB
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#endif
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typedef target_ulong target_elf_greg_t;
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#ifdef USE_UID16
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typedef uint16_t target_uid_t;
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typedef uint16_t target_gid_t;
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#else
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typedef uint32_t target_uid_t;
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typedef uint32_t target_gid_t;
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#endif
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typedef int32_t target_pid_t;
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#ifdef TARGET_I386
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#define ELF_PLATFORM get_elf_platform()
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static const char *get_elf_platform(void) |
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{
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static char elf_platform[] = "i386"; |
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int family = (thread_env->cpuid_version >> 8) & 0xff; |
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if (family > 6) |
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family = 6;
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if (family >= 3) |
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elf_platform[1] = '0' + family; |
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return elf_platform;
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} |
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#define ELF_HWCAP get_elf_hwcap()
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static uint32_t get_elf_hwcap(void) |
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{
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return thread_env->cpuid_features;
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} |
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#ifdef TARGET_X86_64
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#define ELF_START_MMAP 0x2aaaaab000ULL |
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#define elf_check_arch(x) ( ((x) == ELF_ARCH) )
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#define ELF_CLASS ELFCLASS64
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#define ELF_ARCH EM_X86_64
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static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
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{
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regs->rax = 0;
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regs->rsp = infop->start_stack; |
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regs->rip = infop->entry; |
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} |
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#define ELF_NREG 27 |
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typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
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/*
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* Note that ELF_NREG should be 29 as there should be place for
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* TRAPNO and ERR "registers" as well but linux doesn't dump
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* those.
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*
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* See linux kernel: arch/x86/include/asm/elf.h
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*/
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static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
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{
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(*regs)[0] = env->regs[15]; |
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(*regs)[1] = env->regs[14]; |
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(*regs)[2] = env->regs[13]; |
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(*regs)[3] = env->regs[12]; |
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(*regs)[4] = env->regs[R_EBP];
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(*regs)[5] = env->regs[R_EBX];
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(*regs)[6] = env->regs[11]; |
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(*regs)[7] = env->regs[10]; |
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(*regs)[8] = env->regs[9]; |
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(*regs)[9] = env->regs[8]; |
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(*regs)[10] = env->regs[R_EAX];
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(*regs)[11] = env->regs[R_ECX];
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(*regs)[12] = env->regs[R_EDX];
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(*regs)[13] = env->regs[R_ESI];
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(*regs)[14] = env->regs[R_EDI];
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(*regs)[15] = env->regs[R_EAX]; /* XXX */ |
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(*regs)[16] = env->eip;
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(*regs)[17] = env->segs[R_CS].selector & 0xffff; |
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(*regs)[18] = env->eflags;
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(*regs)[19] = env->regs[R_ESP];
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(*regs)[20] = env->segs[R_SS].selector & 0xffff; |
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(*regs)[21] = env->segs[R_FS].selector & 0xffff; |
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(*regs)[22] = env->segs[R_GS].selector & 0xffff; |
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(*regs)[23] = env->segs[R_DS].selector & 0xffff; |
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(*regs)[24] = env->segs[R_ES].selector & 0xffff; |
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(*regs)[25] = env->segs[R_FS].selector & 0xffff; |
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(*regs)[26] = env->segs[R_GS].selector & 0xffff; |
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} |
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#else
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#define ELF_START_MMAP 0x80000000 |
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/*
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* This is used to ensure we don't load something for the wrong architecture.
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*/
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#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
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/*
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* These are used to set parameters in the core dumps.
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*/
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_386
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static inline void init_thread(struct target_pt_regs *regs, |
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struct image_info *infop)
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{
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regs->esp = infop->start_stack; |
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regs->eip = infop->entry; |
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/* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
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starts %edx contains a pointer to a function which might be
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registered using `atexit'. This provides a mean for the
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dynamic linker to call DT_FINI functions for shared libraries
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that have been loaded before the code runs.
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A value of 0 tells we have no such handler. */
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regs->edx = 0;
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} |
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#define ELF_NREG 17 |
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typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
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/*
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* Note that ELF_NREG should be 19 as there should be place for
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* TRAPNO and ERR "registers" as well but linux doesn't dump
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* those.
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*
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* See linux kernel: arch/x86/include/asm/elf.h
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*/
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static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
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{
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(*regs)[0] = env->regs[R_EBX];
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(*regs)[1] = env->regs[R_ECX];
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(*regs)[2] = env->regs[R_EDX];
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(*regs)[3] = env->regs[R_ESI];
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(*regs)[4] = env->regs[R_EDI];
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(*regs)[5] = env->regs[R_EBP];
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(*regs)[6] = env->regs[R_EAX];
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(*regs)[7] = env->segs[R_DS].selector & 0xffff; |
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(*regs)[8] = env->segs[R_ES].selector & 0xffff; |
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(*regs)[9] = env->segs[R_FS].selector & 0xffff; |
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(*regs)[10] = env->segs[R_GS].selector & 0xffff; |
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(*regs)[11] = env->regs[R_EAX]; /* XXX */ |
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(*regs)[12] = env->eip;
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(*regs)[13] = env->segs[R_CS].selector & 0xffff; |
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(*regs)[14] = env->eflags;
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(*regs)[15] = env->regs[R_ESP];
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(*regs)[16] = env->segs[R_SS].selector & 0xffff; |
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} |
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#endif
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#define USE_ELF_CORE_DUMP
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#define ELF_EXEC_PAGESIZE 4096 |
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#endif
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#ifdef TARGET_ARM
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#define ELF_START_MMAP 0x80000000 |
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#define elf_check_arch(x) ( (x) == EM_ARM )
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_ARM
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static inline void init_thread(struct target_pt_regs *regs, |
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struct image_info *infop)
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{
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abi_long stack = infop->start_stack; |
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memset(regs, 0, sizeof(*regs)); |
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regs->ARM_cpsr = 0x10;
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if (infop->entry & 1) |
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regs->ARM_cpsr |= CPSR_T; |
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regs->ARM_pc = infop->entry & 0xfffffffe;
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regs->ARM_sp = infop->start_stack; |
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/* FIXME - what to for failure of get_user()? */
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get_user_ual(regs->ARM_r2, stack + 8); /* envp */ |
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get_user_ual(regs->ARM_r1, stack + 4); /* envp */ |
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/* XXX: it seems that r0 is zeroed after ! */
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regs->ARM_r0 = 0;
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/* For uClinux PIC binaries. */
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/* XXX: Linux does this only on ARM with no MMU (do we care ?) */
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regs->ARM_r10 = infop->start_data; |
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} |
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#define ELF_NREG 18 |
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typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
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static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
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{
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(*regs)[0] = tswapl(env->regs[0]); |
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(*regs)[1] = tswapl(env->regs[1]); |
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(*regs)[2] = tswapl(env->regs[2]); |
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(*regs)[3] = tswapl(env->regs[3]); |
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(*regs)[4] = tswapl(env->regs[4]); |
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(*regs)[5] = tswapl(env->regs[5]); |
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(*regs)[6] = tswapl(env->regs[6]); |
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(*regs)[7] = tswapl(env->regs[7]); |
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(*regs)[8] = tswapl(env->regs[8]); |
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(*regs)[9] = tswapl(env->regs[9]); |
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(*regs)[10] = tswapl(env->regs[10]); |
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(*regs)[11] = tswapl(env->regs[11]); |
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(*regs)[12] = tswapl(env->regs[12]); |
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(*regs)[13] = tswapl(env->regs[13]); |
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(*regs)[14] = tswapl(env->regs[14]); |
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(*regs)[15] = tswapl(env->regs[15]); |
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(*regs)[16] = tswapl(cpsr_read((CPUState *)env));
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(*regs)[17] = tswapl(env->regs[0]); /* XXX */ |
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} |
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#define USE_ELF_CORE_DUMP
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#define ELF_EXEC_PAGESIZE 4096 |
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enum
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{
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ARM_HWCAP_ARM_SWP = 1 << 0, |
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ARM_HWCAP_ARM_HALF = 1 << 1, |
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ARM_HWCAP_ARM_THUMB = 1 << 2, |
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ARM_HWCAP_ARM_26BIT = 1 << 3, |
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ARM_HWCAP_ARM_FAST_MULT = 1 << 4, |
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ARM_HWCAP_ARM_FPA = 1 << 5, |
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ARM_HWCAP_ARM_VFP = 1 << 6, |
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ARM_HWCAP_ARM_EDSP = 1 << 7, |
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ARM_HWCAP_ARM_JAVA = 1 << 8, |
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ARM_HWCAP_ARM_IWMMXT = 1 << 9, |
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ARM_HWCAP_ARM_THUMBEE = 1 << 10, |
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ARM_HWCAP_ARM_NEON = 1 << 11, |
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ARM_HWCAP_ARM_VFPv3 = 1 << 12, |
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ARM_HWCAP_ARM_VFPv3D16 = 1 << 13, |
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}; |
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|
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#define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \
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| ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \ |
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| ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP \ |
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| ARM_HWCAP_ARM_NEON | ARM_HWCAP_ARM_VFPv3 ) |
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|
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#endif
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|
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#ifdef TARGET_SPARC
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#ifdef TARGET_SPARC64
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#define ELF_START_MMAP 0x80000000 |
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#ifndef TARGET_ABI32
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#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
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#else
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#define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
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#endif
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|
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#define ELF_CLASS ELFCLASS64
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#define ELF_ARCH EM_SPARCV9
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|
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#define STACK_BIAS 2047 |
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|
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static inline void init_thread(struct target_pt_regs *regs, |
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struct image_info *infop)
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{
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#ifndef TARGET_ABI32
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regs->tstate = 0;
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#endif
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regs->pc = infop->entry; |
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regs->npc = regs->pc + 4;
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regs->y = 0;
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#ifdef TARGET_ABI32
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regs->u_regs[14] = infop->start_stack - 16 * 4; |
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#else
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if (personality(infop->personality) == PER_LINUX32)
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regs->u_regs[14] = infop->start_stack - 16 * 4; |
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else
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regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS; |
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#endif
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} |
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|
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#else
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#define ELF_START_MMAP 0x80000000 |
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|
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#define elf_check_arch(x) ( (x) == EM_SPARC )
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|
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_SPARC
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|
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static inline void init_thread(struct target_pt_regs *regs, |
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struct image_info *infop)
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{
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regs->psr = 0;
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regs->pc = infop->entry; |
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regs->npc = regs->pc + 4;
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regs->y = 0;
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regs->u_regs[14] = infop->start_stack - 16 * 4; |
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} |
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#endif
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#endif
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#ifdef TARGET_PPC
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#define ELF_START_MMAP 0x80000000 |
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|
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#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
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|
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#define elf_check_arch(x) ( (x) == EM_PPC64 )
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#define ELF_CLASS ELFCLASS64
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#else
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#define elf_check_arch(x) ( (x) == EM_PPC )
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#define ELF_CLASS ELFCLASS32
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|
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#endif
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#define ELF_ARCH EM_PPC
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/* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
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See arch/powerpc/include/asm/cputable.h. */
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enum {
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QEMU_PPC_FEATURE_32 = 0x80000000,
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QEMU_PPC_FEATURE_64 = 0x40000000,
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QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
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QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
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QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
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QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
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QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
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QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
|
| 429 |
QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
|
| 430 |
QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
|
| 431 |
QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
|
| 432 |
QEMU_PPC_FEATURE_NO_TB = 0x00100000,
|
| 433 |
QEMU_PPC_FEATURE_POWER4 = 0x00080000,
|
| 434 |
QEMU_PPC_FEATURE_POWER5 = 0x00040000,
|
| 435 |
QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
|
| 436 |
QEMU_PPC_FEATURE_CELL = 0x00010000,
|
| 437 |
QEMU_PPC_FEATURE_BOOKE = 0x00008000,
|
| 438 |
QEMU_PPC_FEATURE_SMT = 0x00004000,
|
| 439 |
QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
|
| 440 |
QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
|
| 441 |
QEMU_PPC_FEATURE_PA6T = 0x00000800,
|
| 442 |
QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
|
| 443 |
QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
|
| 444 |
QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
|
| 445 |
QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
|
| 446 |
QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
|
| 447 |
|
| 448 |
QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
|
| 449 |
QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
|
| 450 |
}; |
| 451 |
|
| 452 |
#define ELF_HWCAP get_elf_hwcap()
|
| 453 |
|
| 454 |
static uint32_t get_elf_hwcap(void) |
| 455 |
{
|
| 456 |
CPUState *e = thread_env; |
| 457 |
uint32_t features = 0;
|
| 458 |
|
| 459 |
/* We don't have to be terribly complete here; the high points are
|
| 460 |
Altivec/FP/SPE support. Anything else is just a bonus. */
|
| 461 |
#define GET_FEATURE(flag, feature) \
|
| 462 |
do {if (e->insns_flags & flag) features |= feature; } while(0) |
| 463 |
GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64); |
| 464 |
GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU); |
| 465 |
GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC); |
| 466 |
GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE); |
| 467 |
GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE); |
| 468 |
GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE); |
| 469 |
GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE); |
| 470 |
GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC); |
| 471 |
#undef GET_FEATURE
|
| 472 |
|
| 473 |
return features;
|
| 474 |
} |
| 475 |
|
| 476 |
/*
|
| 477 |
* The requirements here are:
|
| 478 |
* - keep the final alignment of sp (sp & 0xf)
|
| 479 |
* - make sure the 32-bit value at the first 16 byte aligned position of
|
| 480 |
* AUXV is greater than 16 for glibc compatibility.
|
| 481 |
* AT_IGNOREPPC is used for that.
|
| 482 |
* - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
|
| 483 |
* even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
|
| 484 |
*/
|
| 485 |
#define DLINFO_ARCH_ITEMS 5 |
| 486 |
#define ARCH_DLINFO \
|
| 487 |
do { \
|
| 488 |
NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
|
| 489 |
NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
|
| 490 |
NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
|
| 491 |
/* \
|
| 492 |
* Now handle glibc compatibility. \
|
| 493 |
*/ \
|
| 494 |
NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
| 495 |
NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
| 496 |
} while (0) |
| 497 |
|
| 498 |
static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop) |
| 499 |
{
|
| 500 |
_regs->gpr[1] = infop->start_stack;
|
| 501 |
#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
|
| 502 |
_regs->gpr[2] = ldq_raw(infop->entry + 8) + infop->load_addr; |
| 503 |
infop->entry = ldq_raw(infop->entry) + infop->load_addr; |
| 504 |
#endif
|
| 505 |
_regs->nip = infop->entry; |
| 506 |
} |
| 507 |
|
| 508 |
/* See linux kernel: arch/powerpc/include/asm/elf.h. */
|
| 509 |
#define ELF_NREG 48 |
| 510 |
typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
| 511 |
|
| 512 |
static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
| 513 |
{
|
| 514 |
int i;
|
| 515 |
target_ulong ccr = 0;
|
| 516 |
|
| 517 |
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { |
| 518 |
(*regs)[i] = tswapl(env->gpr[i]); |
| 519 |
} |
| 520 |
|
| 521 |
(*regs)[32] = tswapl(env->nip);
|
| 522 |
(*regs)[33] = tswapl(env->msr);
|
| 523 |
(*regs)[35] = tswapl(env->ctr);
|
| 524 |
(*regs)[36] = tswapl(env->lr);
|
| 525 |
(*regs)[37] = tswapl(env->xer);
|
| 526 |
|
| 527 |
for (i = 0; i < ARRAY_SIZE(env->crf); i++) { |
| 528 |
ccr |= env->crf[i] << (32 - ((i + 1) * 4)); |
| 529 |
} |
| 530 |
(*regs)[38] = tswapl(ccr);
|
| 531 |
} |
| 532 |
|
| 533 |
#define USE_ELF_CORE_DUMP
|
| 534 |
#define ELF_EXEC_PAGESIZE 4096 |
| 535 |
|
| 536 |
#endif
|
| 537 |
|
| 538 |
#ifdef TARGET_MIPS
|
| 539 |
|
| 540 |
#define ELF_START_MMAP 0x80000000 |
| 541 |
|
| 542 |
#define elf_check_arch(x) ( (x) == EM_MIPS )
|
| 543 |
|
| 544 |
#ifdef TARGET_MIPS64
|
| 545 |
#define ELF_CLASS ELFCLASS64
|
| 546 |
#else
|
| 547 |
#define ELF_CLASS ELFCLASS32
|
| 548 |
#endif
|
| 549 |
#define ELF_ARCH EM_MIPS
|
| 550 |
|
| 551 |
static inline void init_thread(struct target_pt_regs *regs, |
| 552 |
struct image_info *infop)
|
| 553 |
{
|
| 554 |
regs->cp0_status = 2 << CP0St_KSU;
|
| 555 |
regs->cp0_epc = infop->entry; |
| 556 |
regs->regs[29] = infop->start_stack;
|
| 557 |
} |
| 558 |
|
| 559 |
/* See linux kernel: arch/mips/include/asm/elf.h. */
|
| 560 |
#define ELF_NREG 45 |
| 561 |
typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
| 562 |
|
| 563 |
/* See linux kernel: arch/mips/include/asm/reg.h. */
|
| 564 |
enum {
|
| 565 |
#ifdef TARGET_MIPS64
|
| 566 |
TARGET_EF_R0 = 0,
|
| 567 |
#else
|
| 568 |
TARGET_EF_R0 = 6,
|
| 569 |
#endif
|
| 570 |
TARGET_EF_R26 = TARGET_EF_R0 + 26,
|
| 571 |
TARGET_EF_R27 = TARGET_EF_R0 + 27,
|
| 572 |
TARGET_EF_LO = TARGET_EF_R0 + 32,
|
| 573 |
TARGET_EF_HI = TARGET_EF_R0 + 33,
|
| 574 |
TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
|
| 575 |
TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
|
| 576 |
TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
|
| 577 |
TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
|
| 578 |
}; |
| 579 |
|
| 580 |
/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
|
| 581 |
static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
| 582 |
{
|
| 583 |
int i;
|
| 584 |
|
| 585 |
for (i = 0; i < TARGET_EF_R0; i++) { |
| 586 |
(*regs)[i] = 0;
|
| 587 |
} |
| 588 |
(*regs)[TARGET_EF_R0] = 0;
|
| 589 |
|
| 590 |
for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) { |
| 591 |
(*regs)[TARGET_EF_R0 + i] = tswapl(env->active_tc.gpr[i]); |
| 592 |
} |
| 593 |
|
| 594 |
(*regs)[TARGET_EF_R26] = 0;
|
| 595 |
(*regs)[TARGET_EF_R27] = 0;
|
| 596 |
(*regs)[TARGET_EF_LO] = tswapl(env->active_tc.LO[0]);
|
| 597 |
(*regs)[TARGET_EF_HI] = tswapl(env->active_tc.HI[0]);
|
| 598 |
(*regs)[TARGET_EF_CP0_EPC] = tswapl(env->active_tc.PC); |
| 599 |
(*regs)[TARGET_EF_CP0_BADVADDR] = tswapl(env->CP0_BadVAddr); |
| 600 |
(*regs)[TARGET_EF_CP0_STATUS] = tswapl(env->CP0_Status); |
| 601 |
(*regs)[TARGET_EF_CP0_CAUSE] = tswapl(env->CP0_Cause); |
| 602 |
} |
| 603 |
|
| 604 |
#define USE_ELF_CORE_DUMP
|
| 605 |
#define ELF_EXEC_PAGESIZE 4096 |
| 606 |
|
| 607 |
#endif /* TARGET_MIPS */ |
| 608 |
|
| 609 |
#ifdef TARGET_MICROBLAZE
|
| 610 |
|
| 611 |
#define ELF_START_MMAP 0x80000000 |
| 612 |
|
| 613 |
#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
|
| 614 |
|
| 615 |
#define ELF_CLASS ELFCLASS32
|
| 616 |
#define ELF_ARCH EM_MICROBLAZE
|
| 617 |
|
| 618 |
static inline void init_thread(struct target_pt_regs *regs, |
| 619 |
struct image_info *infop)
|
| 620 |
{
|
| 621 |
regs->pc = infop->entry; |
| 622 |
regs->r1 = infop->start_stack; |
| 623 |
|
| 624 |
} |
| 625 |
|
| 626 |
#define ELF_EXEC_PAGESIZE 4096 |
| 627 |
|
| 628 |
#define USE_ELF_CORE_DUMP
|
| 629 |
#define ELF_NREG 38 |
| 630 |
typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
| 631 |
|
| 632 |
/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
|
| 633 |
static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
| 634 |
{
|
| 635 |
int i, pos = 0; |
| 636 |
|
| 637 |
for (i = 0; i < 32; i++) { |
| 638 |
(*regs)[pos++] = tswapl(env->regs[i]); |
| 639 |
} |
| 640 |
|
| 641 |
for (i = 0; i < 6; i++) { |
| 642 |
(*regs)[pos++] = tswapl(env->sregs[i]); |
| 643 |
} |
| 644 |
} |
| 645 |
|
| 646 |
#endif /* TARGET_MICROBLAZE */ |
| 647 |
|
| 648 |
#ifdef TARGET_SH4
|
| 649 |
|
| 650 |
#define ELF_START_MMAP 0x80000000 |
| 651 |
|
| 652 |
#define elf_check_arch(x) ( (x) == EM_SH )
|
| 653 |
|
| 654 |
#define ELF_CLASS ELFCLASS32
|
| 655 |
#define ELF_ARCH EM_SH
|
| 656 |
|
| 657 |
static inline void init_thread(struct target_pt_regs *regs, |
| 658 |
struct image_info *infop)
|
| 659 |
{
|
| 660 |
/* Check other registers XXXXX */
|
| 661 |
regs->pc = infop->entry; |
| 662 |
regs->regs[15] = infop->start_stack;
|
| 663 |
} |
| 664 |
|
| 665 |
/* See linux kernel: arch/sh/include/asm/elf.h. */
|
| 666 |
#define ELF_NREG 23 |
| 667 |
typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
| 668 |
|
| 669 |
/* See linux kernel: arch/sh/include/asm/ptrace.h. */
|
| 670 |
enum {
|
| 671 |
TARGET_REG_PC = 16,
|
| 672 |
TARGET_REG_PR = 17,
|
| 673 |
TARGET_REG_SR = 18,
|
| 674 |
TARGET_REG_GBR = 19,
|
| 675 |
TARGET_REG_MACH = 20,
|
| 676 |
TARGET_REG_MACL = 21,
|
| 677 |
TARGET_REG_SYSCALL = 22
|
| 678 |
}; |
| 679 |
|
| 680 |
static inline void elf_core_copy_regs(target_elf_gregset_t *regs, |
| 681 |
const CPUState *env)
|
| 682 |
{
|
| 683 |
int i;
|
| 684 |
|
| 685 |
for (i = 0; i < 16; i++) { |
| 686 |
(*regs[i]) = tswapl(env->gregs[i]); |
| 687 |
} |
| 688 |
|
| 689 |
(*regs)[TARGET_REG_PC] = tswapl(env->pc); |
| 690 |
(*regs)[TARGET_REG_PR] = tswapl(env->pr); |
| 691 |
(*regs)[TARGET_REG_SR] = tswapl(env->sr); |
| 692 |
(*regs)[TARGET_REG_GBR] = tswapl(env->gbr); |
| 693 |
(*regs)[TARGET_REG_MACH] = tswapl(env->mach); |
| 694 |
(*regs)[TARGET_REG_MACL] = tswapl(env->macl); |
| 695 |
(*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */ |
| 696 |
} |
| 697 |
|
| 698 |
#define USE_ELF_CORE_DUMP
|
| 699 |
#define ELF_EXEC_PAGESIZE 4096 |
| 700 |
|
| 701 |
#endif
|
| 702 |
|
| 703 |
#ifdef TARGET_CRIS
|
| 704 |
|
| 705 |
#define ELF_START_MMAP 0x80000000 |
| 706 |
|
| 707 |
#define elf_check_arch(x) ( (x) == EM_CRIS )
|
| 708 |
|
| 709 |
#define ELF_CLASS ELFCLASS32
|
| 710 |
#define ELF_ARCH EM_CRIS
|
| 711 |
|
| 712 |
static inline void init_thread(struct target_pt_regs *regs, |
| 713 |
struct image_info *infop)
|
| 714 |
{
|
| 715 |
regs->erp = infop->entry; |
| 716 |
} |
| 717 |
|
| 718 |
#define ELF_EXEC_PAGESIZE 8192 |
| 719 |
|
| 720 |
#endif
|
| 721 |
|
| 722 |
#ifdef TARGET_M68K
|
| 723 |
|
| 724 |
#define ELF_START_MMAP 0x80000000 |
| 725 |
|
| 726 |
#define elf_check_arch(x) ( (x) == EM_68K )
|
| 727 |
|
| 728 |
#define ELF_CLASS ELFCLASS32
|
| 729 |
#define ELF_ARCH EM_68K
|
| 730 |
|
| 731 |
/* ??? Does this need to do anything?
|
| 732 |
#define ELF_PLAT_INIT(_r) */
|
| 733 |
|
| 734 |
static inline void init_thread(struct target_pt_regs *regs, |
| 735 |
struct image_info *infop)
|
| 736 |
{
|
| 737 |
regs->usp = infop->start_stack; |
| 738 |
regs->sr = 0;
|
| 739 |
regs->pc = infop->entry; |
| 740 |
} |
| 741 |
|
| 742 |
/* See linux kernel: arch/m68k/include/asm/elf.h. */
|
| 743 |
#define ELF_NREG 20 |
| 744 |
typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
| 745 |
|
| 746 |
static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
| 747 |
{
|
| 748 |
(*regs)[0] = tswapl(env->dregs[1]); |
| 749 |
(*regs)[1] = tswapl(env->dregs[2]); |
| 750 |
(*regs)[2] = tswapl(env->dregs[3]); |
| 751 |
(*regs)[3] = tswapl(env->dregs[4]); |
| 752 |
(*regs)[4] = tswapl(env->dregs[5]); |
| 753 |
(*regs)[5] = tswapl(env->dregs[6]); |
| 754 |
(*regs)[6] = tswapl(env->dregs[7]); |
| 755 |
(*regs)[7] = tswapl(env->aregs[0]); |
| 756 |
(*regs)[8] = tswapl(env->aregs[1]); |
| 757 |
(*regs)[9] = tswapl(env->aregs[2]); |
| 758 |
(*regs)[10] = tswapl(env->aregs[3]); |
| 759 |
(*regs)[11] = tswapl(env->aregs[4]); |
| 760 |
(*regs)[12] = tswapl(env->aregs[5]); |
| 761 |
(*regs)[13] = tswapl(env->aregs[6]); |
| 762 |
(*regs)[14] = tswapl(env->dregs[0]); |
| 763 |
(*regs)[15] = tswapl(env->aregs[7]); |
| 764 |
(*regs)[16] = tswapl(env->dregs[0]); /* FIXME: orig_d0 */ |
| 765 |
(*regs)[17] = tswapl(env->sr);
|
| 766 |
(*regs)[18] = tswapl(env->pc);
|
| 767 |
(*regs)[19] = 0; /* FIXME: regs->format | regs->vector */ |
| 768 |
} |
| 769 |
|
| 770 |
#define USE_ELF_CORE_DUMP
|
| 771 |
#define ELF_EXEC_PAGESIZE 8192 |
| 772 |
|
| 773 |
#endif
|
| 774 |
|
| 775 |
#ifdef TARGET_ALPHA
|
| 776 |
|
| 777 |
#define ELF_START_MMAP (0x30000000000ULL) |
| 778 |
|
| 779 |
#define elf_check_arch(x) ( (x) == ELF_ARCH )
|
| 780 |
|
| 781 |
#define ELF_CLASS ELFCLASS64
|
| 782 |
#define ELF_ARCH EM_ALPHA
|
| 783 |
|
| 784 |
static inline void init_thread(struct target_pt_regs *regs, |
| 785 |
struct image_info *infop)
|
| 786 |
{
|
| 787 |
regs->pc = infop->entry; |
| 788 |
regs->ps = 8;
|
| 789 |
regs->usp = infop->start_stack; |
| 790 |
} |
| 791 |
|
| 792 |
#define ELF_EXEC_PAGESIZE 8192 |
| 793 |
|
| 794 |
#endif /* TARGET_ALPHA */ |
| 795 |
|
| 796 |
#ifndef ELF_PLATFORM
|
| 797 |
#define ELF_PLATFORM (NULL) |
| 798 |
#endif
|
| 799 |
|
| 800 |
#ifndef ELF_HWCAP
|
| 801 |
#define ELF_HWCAP 0 |
| 802 |
#endif
|
| 803 |
|
| 804 |
#ifdef TARGET_ABI32
|
| 805 |
#undef ELF_CLASS
|
| 806 |
#define ELF_CLASS ELFCLASS32
|
| 807 |
#undef bswaptls
|
| 808 |
#define bswaptls(ptr) bswap32s(ptr)
|
| 809 |
#endif
|
| 810 |
|
| 811 |
#include "elf.h" |
| 812 |
|
| 813 |
struct exec
|
| 814 |
{
|
| 815 |
unsigned int a_info; /* Use macros N_MAGIC, etc for access */ |
| 816 |
unsigned int a_text; /* length of text, in bytes */ |
| 817 |
unsigned int a_data; /* length of data, in bytes */ |
| 818 |
unsigned int a_bss; /* length of uninitialized data area, in bytes */ |
| 819 |
unsigned int a_syms; /* length of symbol table data in file, in bytes */ |
| 820 |
unsigned int a_entry; /* start address */ |
| 821 |
unsigned int a_trsize; /* length of relocation info for text, in bytes */ |
| 822 |
unsigned int a_drsize; /* length of relocation info for data, in bytes */ |
| 823 |
}; |
| 824 |
|
| 825 |
|
| 826 |
#define N_MAGIC(exec) ((exec).a_info & 0xffff) |
| 827 |
#define OMAGIC 0407 |
| 828 |
#define NMAGIC 0410 |
| 829 |
#define ZMAGIC 0413 |
| 830 |
#define QMAGIC 0314 |
| 831 |
|
| 832 |
/* max code+data+bss+brk space allocated to ET_DYN executables */
|
| 833 |
#define ET_DYN_MAP_SIZE (128 * 1024 * 1024) |
| 834 |
|
| 835 |
/* Necessary parameters */
|
| 836 |
#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
|
| 837 |
#define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1)) |
| 838 |
#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1)) |
| 839 |
|
| 840 |
#define INTERPRETER_NONE 0 |
| 841 |
#define INTERPRETER_AOUT 1 |
| 842 |
#define INTERPRETER_ELF 2 |
| 843 |
|
| 844 |
#define DLINFO_ITEMS 12 |
| 845 |
|
| 846 |
static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) |
| 847 |
{
|
| 848 |
memcpy(to, from, n); |
| 849 |
} |
| 850 |
|
| 851 |
static int load_aout_interp(void * exptr, int interp_fd); |
| 852 |
|
| 853 |
#ifdef BSWAP_NEEDED
|
| 854 |
static void bswap_ehdr(struct elfhdr *ehdr) |
| 855 |
{
|
| 856 |
bswap16s(&ehdr->e_type); /* Object file type */
|
| 857 |
bswap16s(&ehdr->e_machine); /* Architecture */
|
| 858 |
bswap32s(&ehdr->e_version); /* Object file version */
|
| 859 |
bswaptls(&ehdr->e_entry); /* Entry point virtual address */
|
| 860 |
bswaptls(&ehdr->e_phoff); /* Program header table file offset */
|
| 861 |
bswaptls(&ehdr->e_shoff); /* Section header table file offset */
|
| 862 |
bswap32s(&ehdr->e_flags); /* Processor-specific flags */
|
| 863 |
bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
|
| 864 |
bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
|
| 865 |
bswap16s(&ehdr->e_phnum); /* Program header table entry count */
|
| 866 |
bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
|
| 867 |
bswap16s(&ehdr->e_shnum); /* Section header table entry count */
|
| 868 |
bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
|
| 869 |
} |
| 870 |
|
| 871 |
static void bswap_phdr(struct elf_phdr *phdr, int phnum) |
| 872 |
{
|
| 873 |
int i;
|
| 874 |
for (i = 0; i < phnum; ++i, ++phdr) { |
| 875 |
bswap32s(&phdr->p_type); /* Segment type */
|
| 876 |
bswap32s(&phdr->p_flags); /* Segment flags */
|
| 877 |
bswaptls(&phdr->p_offset); /* Segment file offset */
|
| 878 |
bswaptls(&phdr->p_vaddr); /* Segment virtual address */
|
| 879 |
bswaptls(&phdr->p_paddr); /* Segment physical address */
|
| 880 |
bswaptls(&phdr->p_filesz); /* Segment size in file */
|
| 881 |
bswaptls(&phdr->p_memsz); /* Segment size in memory */
|
| 882 |
bswaptls(&phdr->p_align); /* Segment alignment */
|
| 883 |
} |
| 884 |
} |
| 885 |
|
| 886 |
static void bswap_shdr(struct elf_shdr *shdr, int shnum) |
| 887 |
{
|
| 888 |
int i;
|
| 889 |
for (i = 0; i < shnum; ++i, ++shdr) { |
| 890 |
bswap32s(&shdr->sh_name); |
| 891 |
bswap32s(&shdr->sh_type); |
| 892 |
bswaptls(&shdr->sh_flags); |
| 893 |
bswaptls(&shdr->sh_addr); |
| 894 |
bswaptls(&shdr->sh_offset); |
| 895 |
bswaptls(&shdr->sh_size); |
| 896 |
bswap32s(&shdr->sh_link); |
| 897 |
bswap32s(&shdr->sh_info); |
| 898 |
bswaptls(&shdr->sh_addralign); |
| 899 |
bswaptls(&shdr->sh_entsize); |
| 900 |
} |
| 901 |
} |
| 902 |
|
| 903 |
static void bswap_sym(struct elf_sym *sym) |
| 904 |
{
|
| 905 |
bswap32s(&sym->st_name); |
| 906 |
bswaptls(&sym->st_value); |
| 907 |
bswaptls(&sym->st_size); |
| 908 |
bswap16s(&sym->st_shndx); |
| 909 |
} |
| 910 |
#else
|
| 911 |
static inline void bswap_ehdr(struct elfhdr *ehdr) { } |
| 912 |
static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { } |
| 913 |
static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { } |
| 914 |
static inline void bswap_sym(struct elf_sym *sym) { } |
| 915 |
#endif
|
| 916 |
|
| 917 |
#ifdef USE_ELF_CORE_DUMP
|
| 918 |
static int elf_core_dump(int, const CPUState *); |
| 919 |
#endif /* USE_ELF_CORE_DUMP */ |
| 920 |
static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias); |
| 921 |
|
| 922 |
/* Verify the portions of EHDR within E_IDENT for the target.
|
| 923 |
This can be performed before bswapping the entire header. */
|
| 924 |
static bool elf_check_ident(struct elfhdr *ehdr) |
| 925 |
{
|
| 926 |
return (ehdr->e_ident[EI_MAG0] == ELFMAG0
|
| 927 |
&& ehdr->e_ident[EI_MAG1] == ELFMAG1 |
| 928 |
&& ehdr->e_ident[EI_MAG2] == ELFMAG2 |
| 929 |
&& ehdr->e_ident[EI_MAG3] == ELFMAG3 |
| 930 |
&& ehdr->e_ident[EI_CLASS] == ELF_CLASS |
| 931 |
&& ehdr->e_ident[EI_DATA] == ELF_DATA |
| 932 |
&& ehdr->e_ident[EI_VERSION] == EV_CURRENT); |
| 933 |
} |
| 934 |
|
| 935 |
/* Verify the portions of EHDR outside of E_IDENT for the target.
|
| 936 |
This has to wait until after bswapping the header. */
|
| 937 |
static bool elf_check_ehdr(struct elfhdr *ehdr) |
| 938 |
{
|
| 939 |
return (elf_check_arch(ehdr->e_machine)
|
| 940 |
&& ehdr->e_ehsize == sizeof(struct elfhdr) |
| 941 |
&& ehdr->e_phentsize == sizeof(struct elf_phdr) |
| 942 |
&& ehdr->e_shentsize == sizeof(struct elf_shdr) |
| 943 |
&& (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN)); |
| 944 |
} |
| 945 |
|
| 946 |
/*
|
| 947 |
* 'copy_elf_strings()' copies argument/envelope strings from user
|
| 948 |
* memory to free pages in kernel mem. These are in a format ready
|
| 949 |
* to be put directly into the top of new user memory.
|
| 950 |
*
|
| 951 |
*/
|
| 952 |
static abi_ulong copy_elf_strings(int argc,char ** argv, void **page, |
| 953 |
abi_ulong p) |
| 954 |
{
|
| 955 |
char *tmp, *tmp1, *pag = NULL; |
| 956 |
int len, offset = 0; |
| 957 |
|
| 958 |
if (!p) {
|
| 959 |
return 0; /* bullet-proofing */ |
| 960 |
} |
| 961 |
while (argc-- > 0) { |
| 962 |
tmp = argv[argc]; |
| 963 |
if (!tmp) {
|
| 964 |
fprintf(stderr, "VFS: argc is wrong");
|
| 965 |
exit(-1);
|
| 966 |
} |
| 967 |
tmp1 = tmp; |
| 968 |
while (*tmp++);
|
| 969 |
len = tmp - tmp1; |
| 970 |
if (p < len) { /* this shouldn't happen - 128kB */ |
| 971 |
return 0; |
| 972 |
} |
| 973 |
while (len) {
|
| 974 |
--p; --tmp; --len; |
| 975 |
if (--offset < 0) { |
| 976 |
offset = p % TARGET_PAGE_SIZE; |
| 977 |
pag = (char *)page[p/TARGET_PAGE_SIZE];
|
| 978 |
if (!pag) {
|
| 979 |
pag = (char *)malloc(TARGET_PAGE_SIZE);
|
| 980 |
memset(pag, 0, TARGET_PAGE_SIZE);
|
| 981 |
page[p/TARGET_PAGE_SIZE] = pag; |
| 982 |
if (!pag)
|
| 983 |
return 0; |
| 984 |
} |
| 985 |
} |
| 986 |
if (len == 0 || offset == 0) { |
| 987 |
*(pag + offset) = *tmp; |
| 988 |
} |
| 989 |
else {
|
| 990 |
int bytes_to_copy = (len > offset) ? offset : len;
|
| 991 |
tmp -= bytes_to_copy; |
| 992 |
p -= bytes_to_copy; |
| 993 |
offset -= bytes_to_copy; |
| 994 |
len -= bytes_to_copy; |
| 995 |
memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
|
| 996 |
} |
| 997 |
} |
| 998 |
} |
| 999 |
return p;
|
| 1000 |
} |
| 1001 |
|
| 1002 |
static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm, |
| 1003 |
struct image_info *info)
|
| 1004 |
{
|
| 1005 |
abi_ulong stack_base, size, error, guard; |
| 1006 |
int i;
|
| 1007 |
|
| 1008 |
/* Create enough stack to hold everything. If we don't use
|
| 1009 |
it for args, we'll use it for something else. */
|
| 1010 |
size = guest_stack_size; |
| 1011 |
if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE) {
|
| 1012 |
size = MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
| 1013 |
} |
| 1014 |
guard = TARGET_PAGE_SIZE; |
| 1015 |
if (guard < qemu_real_host_page_size) {
|
| 1016 |
guard = qemu_real_host_page_size; |
| 1017 |
} |
| 1018 |
|
| 1019 |
error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
|
| 1020 |
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 1021 |
if (error == -1) { |
| 1022 |
perror("mmap stack");
|
| 1023 |
exit(-1);
|
| 1024 |
} |
| 1025 |
|
| 1026 |
/* We reserve one extra page at the top of the stack as guard. */
|
| 1027 |
target_mprotect(error, guard, PROT_NONE); |
| 1028 |
|
| 1029 |
info->stack_limit = error + guard; |
| 1030 |
stack_base = info->stack_limit + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
| 1031 |
p += stack_base; |
| 1032 |
|
| 1033 |
for (i = 0 ; i < MAX_ARG_PAGES ; i++) { |
| 1034 |
if (bprm->page[i]) {
|
| 1035 |
info->rss++; |
| 1036 |
/* FIXME - check return value of memcpy_to_target() for failure */
|
| 1037 |
memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE); |
| 1038 |
free(bprm->page[i]); |
| 1039 |
} |
| 1040 |
stack_base += TARGET_PAGE_SIZE; |
| 1041 |
} |
| 1042 |
return p;
|
| 1043 |
} |
| 1044 |
|
| 1045 |
/* Map and zero the bss. We need to explicitly zero any fractional pages
|
| 1046 |
after the data section (i.e. bss). */
|
| 1047 |
static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot) |
| 1048 |
{
|
| 1049 |
uintptr_t host_start, host_map_start, host_end; |
| 1050 |
|
| 1051 |
last_bss = TARGET_PAGE_ALIGN(last_bss); |
| 1052 |
|
| 1053 |
/* ??? There is confusion between qemu_real_host_page_size and
|
| 1054 |
qemu_host_page_size here and elsewhere in target_mmap, which
|
| 1055 |
may lead to the end of the data section mapping from the file
|
| 1056 |
not being mapped. At least there was an explicit test and
|
| 1057 |
comment for that here, suggesting that "the file size must
|
| 1058 |
be known". The comment probably pre-dates the introduction
|
| 1059 |
of the fstat system call in target_mmap which does in fact
|
| 1060 |
find out the size. What isn't clear is if the workaround
|
| 1061 |
here is still actually needed. For now, continue with it,
|
| 1062 |
but merge it with the "normal" mmap that would allocate the bss. */
|
| 1063 |
|
| 1064 |
host_start = (uintptr_t) g2h(elf_bss); |
| 1065 |
host_end = (uintptr_t) g2h(last_bss); |
| 1066 |
host_map_start = (host_start + qemu_real_host_page_size - 1);
|
| 1067 |
host_map_start &= -qemu_real_host_page_size; |
| 1068 |
|
| 1069 |
if (host_map_start < host_end) {
|
| 1070 |
void *p = mmap((void *)host_map_start, host_end - host_map_start, |
| 1071 |
prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 1072 |
if (p == MAP_FAILED) {
|
| 1073 |
perror("cannot mmap brk");
|
| 1074 |
exit(-1);
|
| 1075 |
} |
| 1076 |
|
| 1077 |
/* Since we didn't use target_mmap, make sure to record
|
| 1078 |
the validity of the pages with qemu. */
|
| 1079 |
page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot|PAGE_VALID); |
| 1080 |
} |
| 1081 |
|
| 1082 |
if (host_start < host_map_start) {
|
| 1083 |
memset((void *)host_start, 0, host_map_start - host_start); |
| 1084 |
} |
| 1085 |
} |
| 1086 |
|
| 1087 |
static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, |
| 1088 |
struct elfhdr * exec,
|
| 1089 |
abi_ulong load_addr, |
| 1090 |
abi_ulong load_bias, |
| 1091 |
abi_ulong interp_load_addr, int ibcs,
|
| 1092 |
struct image_info *info)
|
| 1093 |
{
|
| 1094 |
abi_ulong sp; |
| 1095 |
int size;
|
| 1096 |
abi_ulong u_platform; |
| 1097 |
const char *k_platform; |
| 1098 |
const int n = sizeof(elf_addr_t); |
| 1099 |
|
| 1100 |
sp = p; |
| 1101 |
u_platform = 0;
|
| 1102 |
k_platform = ELF_PLATFORM; |
| 1103 |
if (k_platform) {
|
| 1104 |
size_t len = strlen(k_platform) + 1;
|
| 1105 |
sp -= (len + n - 1) & ~(n - 1); |
| 1106 |
u_platform = sp; |
| 1107 |
/* FIXME - check return value of memcpy_to_target() for failure */
|
| 1108 |
memcpy_to_target(sp, k_platform, len); |
| 1109 |
} |
| 1110 |
/*
|
| 1111 |
* Force 16 byte _final_ alignment here for generality.
|
| 1112 |
*/
|
| 1113 |
sp = sp &~ (abi_ulong)15;
|
| 1114 |
size = (DLINFO_ITEMS + 1) * 2; |
| 1115 |
if (k_platform)
|
| 1116 |
size += 2;
|
| 1117 |
#ifdef DLINFO_ARCH_ITEMS
|
| 1118 |
size += DLINFO_ARCH_ITEMS * 2;
|
| 1119 |
#endif
|
| 1120 |
size += envc + argc + 2;
|
| 1121 |
size += (!ibcs ? 3 : 1); /* argc itself */ |
| 1122 |
size *= n; |
| 1123 |
if (size & 15) |
| 1124 |
sp -= 16 - (size & 15); |
| 1125 |
|
| 1126 |
/* This is correct because Linux defines
|
| 1127 |
* elf_addr_t as Elf32_Off / Elf64_Off
|
| 1128 |
*/
|
| 1129 |
#define NEW_AUX_ENT(id, val) do { \ |
| 1130 |
sp -= n; put_user_ual(val, sp); \ |
| 1131 |
sp -= n; put_user_ual(id, sp); \ |
| 1132 |
} while(0) |
| 1133 |
|
| 1134 |
NEW_AUX_ENT (AT_NULL, 0);
|
| 1135 |
|
| 1136 |
/* There must be exactly DLINFO_ITEMS entries here. */
|
| 1137 |
NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff)); |
| 1138 |
NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr))); |
| 1139 |
NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum)); |
| 1140 |
NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE)); |
| 1141 |
NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr)); |
| 1142 |
NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
|
| 1143 |
NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry); |
| 1144 |
NEW_AUX_ENT(AT_UID, (abi_ulong) getuid()); |
| 1145 |
NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid()); |
| 1146 |
NEW_AUX_ENT(AT_GID, (abi_ulong) getgid()); |
| 1147 |
NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid()); |
| 1148 |
NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP); |
| 1149 |
NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK)); |
| 1150 |
if (k_platform)
|
| 1151 |
NEW_AUX_ENT(AT_PLATFORM, u_platform); |
| 1152 |
#ifdef ARCH_DLINFO
|
| 1153 |
/*
|
| 1154 |
* ARCH_DLINFO must come last so platform specific code can enforce
|
| 1155 |
* special alignment requirements on the AUXV if necessary (eg. PPC).
|
| 1156 |
*/
|
| 1157 |
ARCH_DLINFO; |
| 1158 |
#endif
|
| 1159 |
#undef NEW_AUX_ENT
|
| 1160 |
|
| 1161 |
info->saved_auxv = sp; |
| 1162 |
|
| 1163 |
sp = loader_build_argptr(envc, argc, sp, p, !ibcs); |
| 1164 |
return sp;
|
| 1165 |
} |
| 1166 |
|
| 1167 |
|
| 1168 |
static abi_ulong load_elf_interp(struct elfhdr * interp_elf_ex, |
| 1169 |
int interpreter_fd,
|
| 1170 |
abi_ulong *interp_load_addr, |
| 1171 |
char bprm_buf[BPRM_BUF_SIZE])
|
| 1172 |
{
|
| 1173 |
struct elf_phdr *elf_phdata = NULL; |
| 1174 |
abi_ulong load_addr, load_bias, loaddr, hiaddr; |
| 1175 |
int retval;
|
| 1176 |
abi_ulong error; |
| 1177 |
int i;
|
| 1178 |
|
| 1179 |
bswap_ehdr(interp_elf_ex); |
| 1180 |
if (!elf_check_ehdr(interp_elf_ex)) {
|
| 1181 |
return ~((abi_ulong)0UL); |
| 1182 |
} |
| 1183 |
|
| 1184 |
/* Now read in all of the header information */
|
| 1185 |
elf_phdata = (struct elf_phdr *)
|
| 1186 |
malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); |
| 1187 |
if (!elf_phdata)
|
| 1188 |
return ~((abi_ulong)0UL); |
| 1189 |
|
| 1190 |
i = interp_elf_ex->e_phnum * sizeof(struct elf_phdr); |
| 1191 |
if (interp_elf_ex->e_phoff + i <= BPRM_BUF_SIZE) {
|
| 1192 |
memcpy(elf_phdata, bprm_buf + interp_elf_ex->e_phoff, i); |
| 1193 |
} else {
|
| 1194 |
retval = pread(interpreter_fd, elf_phdata, i, interp_elf_ex->e_phoff); |
| 1195 |
if (retval != i) {
|
| 1196 |
perror("load_elf_interp");
|
| 1197 |
exit(-1);
|
| 1198 |
} |
| 1199 |
} |
| 1200 |
bswap_phdr(elf_phdata, interp_elf_ex->e_phnum); |
| 1201 |
|
| 1202 |
/* Find the maximum size of the image and allocate an appropriate
|
| 1203 |
amount of memory to handle that. */
|
| 1204 |
loaddr = -1, hiaddr = 0; |
| 1205 |
for (i = 0; i < interp_elf_ex->e_phnum; ++i) { |
| 1206 |
if (elf_phdata[i].p_type == PT_LOAD) {
|
| 1207 |
abi_ulong a = elf_phdata[i].p_vaddr; |
| 1208 |
if (a < loaddr) {
|
| 1209 |
loaddr = a; |
| 1210 |
} |
| 1211 |
a += elf_phdata[i].p_memsz; |
| 1212 |
if (a > hiaddr) {
|
| 1213 |
hiaddr = a; |
| 1214 |
} |
| 1215 |
} |
| 1216 |
} |
| 1217 |
|
| 1218 |
load_addr = loaddr; |
| 1219 |
if (interp_elf_ex->e_type == ET_DYN) {
|
| 1220 |
/* The image indicates that it can be loaded anywhere. Find a
|
| 1221 |
location that can hold the memory space required. If the
|
| 1222 |
image is pre-linked, LOADDR will be non-zero. Since we do
|
| 1223 |
not supply MAP_FIXED here we'll use that address if and
|
| 1224 |
only if it remains available. */
|
| 1225 |
load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE, |
| 1226 |
MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, |
| 1227 |
-1, 0); |
| 1228 |
if (load_addr == -1) { |
| 1229 |
perror("mmap");
|
| 1230 |
exit(-1);
|
| 1231 |
} |
| 1232 |
} |
| 1233 |
load_bias = load_addr - loaddr; |
| 1234 |
|
| 1235 |
for (i = 0; i < interp_elf_ex->e_phnum; i++) { |
| 1236 |
struct elf_phdr *eppnt = elf_phdata + i;
|
| 1237 |
if (eppnt->p_type == PT_LOAD) {
|
| 1238 |
abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em; |
| 1239 |
int elf_prot = 0; |
| 1240 |
|
| 1241 |
if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
|
| 1242 |
if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
|
| 1243 |
if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
|
| 1244 |
|
| 1245 |
vaddr = load_bias + eppnt->p_vaddr; |
| 1246 |
vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr); |
| 1247 |
vaddr_ps = TARGET_ELF_PAGESTART(vaddr); |
| 1248 |
|
| 1249 |
error = target_mmap(vaddr_ps, eppnt->p_filesz + vaddr_po, |
| 1250 |
elf_prot, MAP_PRIVATE | MAP_FIXED, |
| 1251 |
interpreter_fd, eppnt->p_offset - vaddr_po); |
| 1252 |
if (error == -1) { |
| 1253 |
/* Real error */
|
| 1254 |
close(interpreter_fd); |
| 1255 |
free(elf_phdata); |
| 1256 |
return ~((abi_ulong)0UL); |
| 1257 |
} |
| 1258 |
|
| 1259 |
vaddr_ef = vaddr + eppnt->p_filesz; |
| 1260 |
vaddr_em = vaddr + eppnt->p_memsz; |
| 1261 |
|
| 1262 |
/* If the load segment requests extra zeros (e.g. bss), map it. */
|
| 1263 |
if (vaddr_ef < vaddr_em) {
|
| 1264 |
zero_bss(vaddr_ef, vaddr_em, elf_prot); |
| 1265 |
} |
| 1266 |
} |
| 1267 |
} |
| 1268 |
|
| 1269 |
if (qemu_log_enabled()) {
|
| 1270 |
load_symbols(interp_elf_ex, interpreter_fd, load_bias); |
| 1271 |
} |
| 1272 |
|
| 1273 |
close(interpreter_fd); |
| 1274 |
free(elf_phdata); |
| 1275 |
|
| 1276 |
*interp_load_addr = load_addr; |
| 1277 |
return ((abi_ulong) interp_elf_ex->e_entry) + load_bias;
|
| 1278 |
} |
| 1279 |
|
| 1280 |
static int symfind(const void *s0, const void *s1) |
| 1281 |
{
|
| 1282 |
struct elf_sym *key = (struct elf_sym *)s0; |
| 1283 |
struct elf_sym *sym = (struct elf_sym *)s1; |
| 1284 |
int result = 0; |
| 1285 |
if (key->st_value < sym->st_value) {
|
| 1286 |
result = -1;
|
| 1287 |
} else if (key->st_value >= sym->st_value + sym->st_size) { |
| 1288 |
result = 1;
|
| 1289 |
} |
| 1290 |
return result;
|
| 1291 |
} |
| 1292 |
|
| 1293 |
static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr) |
| 1294 |
{
|
| 1295 |
#if ELF_CLASS == ELFCLASS32
|
| 1296 |
struct elf_sym *syms = s->disas_symtab.elf32;
|
| 1297 |
#else
|
| 1298 |
struct elf_sym *syms = s->disas_symtab.elf64;
|
| 1299 |
#endif
|
| 1300 |
|
| 1301 |
// binary search
|
| 1302 |
struct elf_sym key;
|
| 1303 |
struct elf_sym *sym;
|
| 1304 |
|
| 1305 |
key.st_value = orig_addr; |
| 1306 |
|
| 1307 |
sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), symfind);
|
| 1308 |
if (sym != NULL) { |
| 1309 |
return s->disas_strtab + sym->st_name;
|
| 1310 |
} |
| 1311 |
|
| 1312 |
return ""; |
| 1313 |
} |
| 1314 |
|
| 1315 |
/* FIXME: This should use elf_ops.h */
|
| 1316 |
static int symcmp(const void *s0, const void *s1) |
| 1317 |
{
|
| 1318 |
struct elf_sym *sym0 = (struct elf_sym *)s0; |
| 1319 |
struct elf_sym *sym1 = (struct elf_sym *)s1; |
| 1320 |
return (sym0->st_value < sym1->st_value)
|
| 1321 |
? -1
|
| 1322 |
: ((sym0->st_value > sym1->st_value) ? 1 : 0); |
| 1323 |
} |
| 1324 |
|
| 1325 |
/* Best attempt to load symbols from this ELF object. */
|
| 1326 |
static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias) |
| 1327 |
{
|
| 1328 |
int i, shnum, nsyms, sym_idx = 0, str_idx = 0; |
| 1329 |
struct elf_shdr *shdr;
|
| 1330 |
char *strings;
|
| 1331 |
struct syminfo *s;
|
| 1332 |
struct elf_sym *syms;
|
| 1333 |
|
| 1334 |
shnum = hdr->e_shnum; |
| 1335 |
i = shnum * sizeof(struct elf_shdr); |
| 1336 |
shdr = (struct elf_shdr *)alloca(i);
|
| 1337 |
if (pread(fd, shdr, i, hdr->e_shoff) != i) {
|
| 1338 |
return;
|
| 1339 |
} |
| 1340 |
|
| 1341 |
bswap_shdr(shdr, shnum); |
| 1342 |
for (i = 0; i < shnum; ++i) { |
| 1343 |
if (shdr[i].sh_type == SHT_SYMTAB) {
|
| 1344 |
sym_idx = i; |
| 1345 |
str_idx = shdr[i].sh_link; |
| 1346 |
goto found;
|
| 1347 |
} |
| 1348 |
} |
| 1349 |
|
| 1350 |
/* There will be no symbol table if the file was stripped. */
|
| 1351 |
return;
|
| 1352 |
|
| 1353 |
found:
|
| 1354 |
/* Now know where the strtab and symtab are. Snarf them. */
|
| 1355 |
s = malloc(sizeof(*s));
|
| 1356 |
if (!s) {
|
| 1357 |
return;
|
| 1358 |
} |
| 1359 |
|
| 1360 |
i = shdr[str_idx].sh_size; |
| 1361 |
s->disas_strtab = strings = malloc(i); |
| 1362 |
if (!strings || pread(fd, strings, i, shdr[str_idx].sh_offset) != i) {
|
| 1363 |
free(s); |
| 1364 |
free(strings); |
| 1365 |
return;
|
| 1366 |
} |
| 1367 |
|
| 1368 |
i = shdr[sym_idx].sh_size; |
| 1369 |
syms = malloc(i); |
| 1370 |
if (!syms || pread(fd, syms, i, shdr[sym_idx].sh_offset) != i) {
|
| 1371 |
free(s); |
| 1372 |
free(strings); |
| 1373 |
free(syms); |
| 1374 |
return;
|
| 1375 |
} |
| 1376 |
|
| 1377 |
nsyms = i / sizeof(struct elf_sym); |
| 1378 |
for (i = 0; i < nsyms; ) { |
| 1379 |
bswap_sym(syms + i); |
| 1380 |
/* Throw away entries which we do not need. */
|
| 1381 |
if (syms[i].st_shndx == SHN_UNDEF
|
| 1382 |
|| syms[i].st_shndx >= SHN_LORESERVE |
| 1383 |
|| ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
|
| 1384 |
if (i < --nsyms) {
|
| 1385 |
syms[i] = syms[nsyms]; |
| 1386 |
} |
| 1387 |
} else {
|
| 1388 |
#if defined(TARGET_ARM) || defined (TARGET_MIPS)
|
| 1389 |
/* The bottom address bit marks a Thumb or MIPS16 symbol. */
|
| 1390 |
syms[i].st_value &= ~(target_ulong)1;
|
| 1391 |
#endif
|
| 1392 |
syms[i].st_value += load_bias; |
| 1393 |
i++; |
| 1394 |
} |
| 1395 |
} |
| 1396 |
|
| 1397 |
syms = realloc(syms, nsyms * sizeof(*syms));
|
| 1398 |
qsort(syms, nsyms, sizeof(*syms), symcmp);
|
| 1399 |
|
| 1400 |
s->disas_num_syms = nsyms; |
| 1401 |
#if ELF_CLASS == ELFCLASS32
|
| 1402 |
s->disas_symtab.elf32 = syms; |
| 1403 |
#else
|
| 1404 |
s->disas_symtab.elf64 = syms; |
| 1405 |
#endif
|
| 1406 |
s->lookup_symbol = lookup_symbolxx; |
| 1407 |
s->next = syminfos; |
| 1408 |
syminfos = s; |
| 1409 |
} |
| 1410 |
|
| 1411 |
int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
| 1412 |
struct image_info * info)
|
| 1413 |
{
|
| 1414 |
struct elfhdr elf_ex;
|
| 1415 |
struct elfhdr interp_elf_ex;
|
| 1416 |
struct exec interp_ex;
|
| 1417 |
int interpreter_fd = -1; /* avoid warning */ |
| 1418 |
abi_ulong load_addr, load_bias; |
| 1419 |
int load_addr_set = 0; |
| 1420 |
unsigned int interpreter_type = INTERPRETER_NONE; |
| 1421 |
unsigned char ibcs2_interpreter; |
| 1422 |
int i;
|
| 1423 |
abi_ulong mapped_addr; |
| 1424 |
struct elf_phdr * elf_ppnt;
|
| 1425 |
struct elf_phdr *elf_phdata;
|
| 1426 |
abi_ulong k, elf_brk; |
| 1427 |
int retval;
|
| 1428 |
char * elf_interpreter;
|
| 1429 |
abi_ulong elf_entry, interp_load_addr = 0;
|
| 1430 |
int status;
|
| 1431 |
abi_ulong start_code, end_code, start_data, end_data; |
| 1432 |
abi_ulong reloc_func_desc = 0;
|
| 1433 |
abi_ulong elf_stack; |
| 1434 |
char passed_fileno[6]; |
| 1435 |
|
| 1436 |
ibcs2_interpreter = 0;
|
| 1437 |
status = 0;
|
| 1438 |
load_addr = 0;
|
| 1439 |
load_bias = 0;
|
| 1440 |
elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */ |
| 1441 |
|
| 1442 |
/* First of all, some simple consistency checks */
|
| 1443 |
if (!elf_check_ident(&elf_ex)) {
|
| 1444 |
return -ENOEXEC;
|
| 1445 |
} |
| 1446 |
bswap_ehdr(&elf_ex); |
| 1447 |
if (!elf_check_ehdr(&elf_ex)) {
|
| 1448 |
return -ENOEXEC;
|
| 1449 |
} |
| 1450 |
|
| 1451 |
bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
|
| 1452 |
bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p); |
| 1453 |
bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p); |
| 1454 |
if (!bprm->p) {
|
| 1455 |
retval = -E2BIG; |
| 1456 |
} |
| 1457 |
|
| 1458 |
/* Now read in all of the header information */
|
| 1459 |
elf_phdata = (struct elf_phdr *)
|
| 1460 |
malloc(elf_ex.e_phnum * sizeof(struct elf_phdr)); |
| 1461 |
if (elf_phdata == NULL) { |
| 1462 |
return -ENOMEM;
|
| 1463 |
} |
| 1464 |
|
| 1465 |
i = elf_ex.e_phnum * sizeof(struct elf_phdr); |
| 1466 |
if (elf_ex.e_phoff + i <= BPRM_BUF_SIZE) {
|
| 1467 |
memcpy(elf_phdata, bprm->buf + elf_ex.e_phoff, i); |
| 1468 |
} else {
|
| 1469 |
retval = pread(bprm->fd, (char *) elf_phdata, i, elf_ex.e_phoff);
|
| 1470 |
if (retval != i) {
|
| 1471 |
perror("load_elf_binary");
|
| 1472 |
exit(-1);
|
| 1473 |
} |
| 1474 |
} |
| 1475 |
bswap_phdr(elf_phdata, elf_ex.e_phnum); |
| 1476 |
|
| 1477 |
elf_brk = 0;
|
| 1478 |
elf_stack = ~((abi_ulong)0UL);
|
| 1479 |
elf_interpreter = NULL;
|
| 1480 |
start_code = ~((abi_ulong)0UL);
|
| 1481 |
end_code = 0;
|
| 1482 |
start_data = 0;
|
| 1483 |
end_data = 0;
|
| 1484 |
interp_ex.a_info = 0;
|
| 1485 |
|
| 1486 |
elf_ppnt = elf_phdata; |
| 1487 |
for(i=0;i < elf_ex.e_phnum; i++) { |
| 1488 |
if (elf_ppnt->p_type == PT_INTERP) {
|
| 1489 |
if ( elf_interpreter != NULL ) |
| 1490 |
{
|
| 1491 |
free (elf_phdata); |
| 1492 |
free(elf_interpreter); |
| 1493 |
close(bprm->fd); |
| 1494 |
return -EINVAL;
|
| 1495 |
} |
| 1496 |
|
| 1497 |
/* This is the program interpreter used for
|
| 1498 |
* shared libraries - for now assume that this
|
| 1499 |
* is an a.out format binary
|
| 1500 |
*/
|
| 1501 |
|
| 1502 |
elf_interpreter = (char *)malloc(elf_ppnt->p_filesz);
|
| 1503 |
|
| 1504 |
if (elf_interpreter == NULL) { |
| 1505 |
free (elf_phdata); |
| 1506 |
close(bprm->fd); |
| 1507 |
return -ENOMEM;
|
| 1508 |
} |
| 1509 |
|
| 1510 |
if (elf_ppnt->p_offset + elf_ppnt->p_filesz <= BPRM_BUF_SIZE) {
|
| 1511 |
memcpy(elf_interpreter, bprm->buf + elf_ppnt->p_offset, |
| 1512 |
elf_ppnt->p_filesz); |
| 1513 |
} else {
|
| 1514 |
retval = pread(bprm->fd, elf_interpreter, elf_ppnt->p_filesz, |
| 1515 |
elf_ppnt->p_offset); |
| 1516 |
if (retval != elf_ppnt->p_filesz) {
|
| 1517 |
perror("load_elf_binary2");
|
| 1518 |
exit(-1);
|
| 1519 |
} |
| 1520 |
} |
| 1521 |
|
| 1522 |
/* If the program interpreter is one of these two,
|
| 1523 |
then assume an iBCS2 image. Otherwise assume
|
| 1524 |
a native linux image. */
|
| 1525 |
|
| 1526 |
/* JRP - Need to add X86 lib dir stuff here... */
|
| 1527 |
|
| 1528 |
if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 || |
| 1529 |
strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) { |
| 1530 |
ibcs2_interpreter = 1;
|
| 1531 |
} |
| 1532 |
|
| 1533 |
retval = open(path(elf_interpreter), O_RDONLY); |
| 1534 |
if (retval < 0) { |
| 1535 |
perror(elf_interpreter); |
| 1536 |
exit(-1);
|
| 1537 |
} |
| 1538 |
interpreter_fd = retval; |
| 1539 |
|
| 1540 |
retval = read(interpreter_fd, bprm->buf, BPRM_BUF_SIZE); |
| 1541 |
if (retval < 0) { |
| 1542 |
perror("load_elf_binary3");
|
| 1543 |
exit(-1);
|
| 1544 |
} |
| 1545 |
if (retval < BPRM_BUF_SIZE) {
|
| 1546 |
memset(bprm->buf, 0, BPRM_BUF_SIZE - retval);
|
| 1547 |
} |
| 1548 |
|
| 1549 |
interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */ |
| 1550 |
interp_elf_ex = *((struct elfhdr *) bprm->buf); /* elf exec-header */ |
| 1551 |
} |
| 1552 |
elf_ppnt++; |
| 1553 |
} |
| 1554 |
|
| 1555 |
/* Some simple consistency checks for the interpreter */
|
| 1556 |
if (elf_interpreter){
|
| 1557 |
interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT; |
| 1558 |
|
| 1559 |
/* Now figure out which format our binary is */
|
| 1560 |
if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) &&
|
| 1561 |
(N_MAGIC(interp_ex) != QMAGIC)) {
|
| 1562 |
interpreter_type = INTERPRETER_ELF; |
| 1563 |
} |
| 1564 |
|
| 1565 |
if (!elf_check_ident(&interp_elf_ex)) {
|
| 1566 |
interpreter_type &= ~INTERPRETER_ELF; |
| 1567 |
} |
| 1568 |
|
| 1569 |
if (!interpreter_type) {
|
| 1570 |
free(elf_interpreter); |
| 1571 |
free(elf_phdata); |
| 1572 |
close(bprm->fd); |
| 1573 |
return -ELIBBAD;
|
| 1574 |
} |
| 1575 |
} |
| 1576 |
|
| 1577 |
/* OK, we are done with that, now set up the arg stuff,
|
| 1578 |
and then start this sucker up */
|
| 1579 |
|
| 1580 |
{
|
| 1581 |
char * passed_p;
|
| 1582 |
|
| 1583 |
if (interpreter_type == INTERPRETER_AOUT) {
|
| 1584 |
snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd); |
| 1585 |
passed_p = passed_fileno; |
| 1586 |
|
| 1587 |
if (elf_interpreter) {
|
| 1588 |
bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p);
|
| 1589 |
bprm->argc++; |
| 1590 |
} |
| 1591 |
} |
| 1592 |
if (!bprm->p) {
|
| 1593 |
if (elf_interpreter) {
|
| 1594 |
free(elf_interpreter); |
| 1595 |
} |
| 1596 |
free (elf_phdata); |
| 1597 |
close(bprm->fd); |
| 1598 |
return -E2BIG;
|
| 1599 |
} |
| 1600 |
} |
| 1601 |
|
| 1602 |
/* OK, This is the point of no return */
|
| 1603 |
info->end_data = 0;
|
| 1604 |
info->end_code = 0;
|
| 1605 |
info->start_mmap = (abi_ulong)ELF_START_MMAP; |
| 1606 |
info->mmap = 0;
|
| 1607 |
elf_entry = (abi_ulong) elf_ex.e_entry; |
| 1608 |
|
| 1609 |
#if defined(CONFIG_USE_GUEST_BASE)
|
| 1610 |
/*
|
| 1611 |
* In case where user has not explicitly set the guest_base, we
|
| 1612 |
* probe here that should we set it automatically.
|
| 1613 |
*/
|
| 1614 |
if (!(have_guest_base || reserved_va)) {
|
| 1615 |
/*
|
| 1616 |
* Go through ELF program header table and find the address
|
| 1617 |
* range used by loadable segments. Check that this is available on
|
| 1618 |
* the host, and if not find a suitable value for guest_base. */
|
| 1619 |
abi_ulong app_start = ~0;
|
| 1620 |
abi_ulong app_end = 0;
|
| 1621 |
abi_ulong addr; |
| 1622 |
unsigned long host_start; |
| 1623 |
unsigned long real_start; |
| 1624 |
unsigned long host_size; |
| 1625 |
for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; |
| 1626 |
i++, elf_ppnt++) {
|
| 1627 |
if (elf_ppnt->p_type != PT_LOAD)
|
| 1628 |
continue;
|
| 1629 |
addr = elf_ppnt->p_vaddr; |
| 1630 |
if (addr < app_start) {
|
| 1631 |
app_start = addr; |
| 1632 |
} |
| 1633 |
addr += elf_ppnt->p_memsz; |
| 1634 |
if (addr > app_end) {
|
| 1635 |
app_end = addr; |
| 1636 |
} |
| 1637 |
} |
| 1638 |
|
| 1639 |
/* If we don't have any loadable segments then something
|
| 1640 |
is very wrong. */
|
| 1641 |
assert(app_start < app_end); |
| 1642 |
|
| 1643 |
/* Round addresses to page boundaries. */
|
| 1644 |
app_start = app_start & qemu_host_page_mask; |
| 1645 |
app_end = HOST_PAGE_ALIGN(app_end); |
| 1646 |
if (app_start < mmap_min_addr) {
|
| 1647 |
host_start = HOST_PAGE_ALIGN(mmap_min_addr); |
| 1648 |
} else {
|
| 1649 |
host_start = app_start; |
| 1650 |
if (host_start != app_start) {
|
| 1651 |
fprintf(stderr, "qemu: Address overflow loading ELF binary\n");
|
| 1652 |
abort(); |
| 1653 |
} |
| 1654 |
} |
| 1655 |
host_size = app_end - app_start; |
| 1656 |
while (1) { |
| 1657 |
/* Do not use mmap_find_vma here because that is limited to the
|
| 1658 |
guest address space. We are going to make the
|
| 1659 |
guest address space fit whatever we're given. */
|
| 1660 |
real_start = (unsigned long)mmap((void *)host_start, host_size, |
| 1661 |
PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE, -1, 0); |
| 1662 |
if (real_start == (unsigned long)-1) { |
| 1663 |
fprintf(stderr, "qemu: Virtual memory exausted\n");
|
| 1664 |
abort(); |
| 1665 |
} |
| 1666 |
if (real_start == host_start) {
|
| 1667 |
break;
|
| 1668 |
} |
| 1669 |
/* That address didn't work. Unmap and try a different one.
|
| 1670 |
The address the host picked because is typically
|
| 1671 |
right at the top of the host address space and leaves the
|
| 1672 |
guest with no usable address space. Resort to a linear search.
|
| 1673 |
We already compensated for mmap_min_addr, so this should not
|
| 1674 |
happen often. Probably means we got unlucky and host address
|
| 1675 |
space randomization put a shared library somewhere
|
| 1676 |
inconvenient. */
|
| 1677 |
munmap((void *)real_start, host_size);
|
| 1678 |
host_start += qemu_host_page_size; |
| 1679 |
if (host_start == app_start) {
|
| 1680 |
/* Theoretically possible if host doesn't have any
|
| 1681 |
suitably aligned areas. Normally the first mmap will
|
| 1682 |
fail. */
|
| 1683 |
fprintf(stderr, "qemu: Unable to find space for application\n");
|
| 1684 |
abort(); |
| 1685 |
} |
| 1686 |
} |
| 1687 |
qemu_log("Relocating guest address space from 0x" TARGET_ABI_FMT_lx
|
| 1688 |
" to 0x%lx\n", app_start, real_start);
|
| 1689 |
guest_base = real_start - app_start; |
| 1690 |
} |
| 1691 |
#endif /* CONFIG_USE_GUEST_BASE */ |
| 1692 |
|
| 1693 |
/* Do this so that we can load the interpreter, if need be. We will
|
| 1694 |
change some of these later */
|
| 1695 |
info->rss = 0;
|
| 1696 |
bprm->p = setup_arg_pages(bprm->p, bprm, info); |
| 1697 |
info->start_stack = bprm->p; |
| 1698 |
|
| 1699 |
/* Now we do a little grungy work by mmaping the ELF image into
|
| 1700 |
* the correct location in memory. At this point, we assume that
|
| 1701 |
* the image should be loaded at fixed address, not at a variable
|
| 1702 |
* address.
|
| 1703 |
*/
|
| 1704 |
|
| 1705 |
for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) { |
| 1706 |
int elf_prot = 0; |
| 1707 |
int elf_flags = 0; |
| 1708 |
abi_ulong error; |
| 1709 |
|
| 1710 |
if (elf_ppnt->p_type != PT_LOAD)
|
| 1711 |
continue;
|
| 1712 |
|
| 1713 |
if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
|
| 1714 |
if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
|
| 1715 |
if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
|
| 1716 |
elf_flags = MAP_PRIVATE | MAP_DENYWRITE; |
| 1717 |
if (elf_ex.e_type == ET_EXEC || load_addr_set) {
|
| 1718 |
elf_flags |= MAP_FIXED; |
| 1719 |
} else if (elf_ex.e_type == ET_DYN) { |
| 1720 |
/* Try and get dynamic programs out of the way of the default mmap
|
| 1721 |
base, as well as whatever program they might try to exec. This
|
| 1722 |
is because the brk will follow the loader, and is not movable. */
|
| 1723 |
/* NOTE: for qemu, we do a big mmap to get enough space
|
| 1724 |
without hardcoding any address */
|
| 1725 |
error = target_mmap(0, ET_DYN_MAP_SIZE,
|
| 1726 |
PROT_NONE, MAP_PRIVATE | MAP_ANON, |
| 1727 |
-1, 0); |
| 1728 |
if (error == -1) { |
| 1729 |
perror("mmap");
|
| 1730 |
exit(-1);
|
| 1731 |
} |
| 1732 |
load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr); |
| 1733 |
} |
| 1734 |
|
| 1735 |
error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr), |
| 1736 |
(elf_ppnt->p_filesz + |
| 1737 |
TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)), |
| 1738 |
elf_prot, |
| 1739 |
(MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE), |
| 1740 |
bprm->fd, |
| 1741 |
(elf_ppnt->p_offset - |
| 1742 |
TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr))); |
| 1743 |
if (error == -1) { |
| 1744 |
perror("mmap");
|
| 1745 |
exit(-1);
|
| 1746 |
} |
| 1747 |
|
| 1748 |
#ifdef LOW_ELF_STACK
|
| 1749 |
if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
|
| 1750 |
elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr); |
| 1751 |
#endif
|
| 1752 |
|
| 1753 |
if (!load_addr_set) {
|
| 1754 |
load_addr_set = 1;
|
| 1755 |
load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset; |
| 1756 |
if (elf_ex.e_type == ET_DYN) {
|
| 1757 |
load_bias += error - |
| 1758 |
TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr); |
| 1759 |
load_addr += load_bias; |
| 1760 |
reloc_func_desc = load_bias; |
| 1761 |
} |
| 1762 |
} |
| 1763 |
k = elf_ppnt->p_vaddr; |
| 1764 |
if (k < start_code)
|
| 1765 |
start_code = k; |
| 1766 |
if (start_data < k)
|
| 1767 |
start_data = k; |
| 1768 |
k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; |
| 1769 |
if ((elf_ppnt->p_flags & PF_X) && end_code < k)
|
| 1770 |
end_code = k; |
| 1771 |
if (end_data < k)
|
| 1772 |
end_data = k; |
| 1773 |
k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz; |
| 1774 |
if (k > elf_brk) {
|
| 1775 |
elf_brk = TARGET_PAGE_ALIGN(k); |
| 1776 |
} |
| 1777 |
|
| 1778 |
/* If the load segment requests extra zeros (e.g. bss), map it. */
|
| 1779 |
if (elf_ppnt->p_filesz < elf_ppnt->p_memsz) {
|
| 1780 |
abi_ulong base = load_bias + elf_ppnt->p_vaddr; |
| 1781 |
zero_bss(base + elf_ppnt->p_filesz, |
| 1782 |
base + elf_ppnt->p_memsz, elf_prot); |
| 1783 |
} |
| 1784 |
} |
| 1785 |
|
| 1786 |
elf_entry += load_bias; |
| 1787 |
elf_brk += load_bias; |
| 1788 |
start_code += load_bias; |
| 1789 |
end_code += load_bias; |
| 1790 |
start_data += load_bias; |
| 1791 |
end_data += load_bias; |
| 1792 |
|
| 1793 |
if (elf_interpreter) {
|
| 1794 |
if (interpreter_type & 1) { |
| 1795 |
elf_entry = load_aout_interp(&interp_ex, interpreter_fd); |
| 1796 |
} else if (interpreter_type & 2) { |
| 1797 |
elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd, |
| 1798 |
&interp_load_addr, bprm->buf); |
| 1799 |
} |
| 1800 |
reloc_func_desc = interp_load_addr; |
| 1801 |
|
| 1802 |
close(interpreter_fd); |
| 1803 |
free(elf_interpreter); |
| 1804 |
|
| 1805 |
if (elf_entry == ~((abi_ulong)0UL)) { |
| 1806 |
printf("Unable to load interpreter\n");
|
| 1807 |
free(elf_phdata); |
| 1808 |
exit(-1);
|
| 1809 |
return 0; |
| 1810 |
} |
| 1811 |
} |
| 1812 |
|
| 1813 |
free(elf_phdata); |
| 1814 |
|
| 1815 |
if (qemu_log_enabled()) {
|
| 1816 |
load_symbols(&elf_ex, bprm->fd, load_bias); |
| 1817 |
} |
| 1818 |
|
| 1819 |
if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd);
|
| 1820 |
info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX); |
| 1821 |
|
| 1822 |
#ifdef LOW_ELF_STACK
|
| 1823 |
info->start_stack = bprm->p = elf_stack - 4;
|
| 1824 |
#endif
|
| 1825 |
bprm->p = create_elf_tables(bprm->p, |
| 1826 |
bprm->argc, |
| 1827 |
bprm->envc, |
| 1828 |
&elf_ex, |
| 1829 |
load_addr, load_bias, |
| 1830 |
interp_load_addr, |
| 1831 |
(interpreter_type == INTERPRETER_AOUT ? 0 : 1), |
| 1832 |
info); |
| 1833 |
info->load_addr = reloc_func_desc; |
| 1834 |
info->start_brk = info->brk = elf_brk; |
| 1835 |
info->end_code = end_code; |
| 1836 |
info->start_code = start_code; |
| 1837 |
info->start_data = start_data; |
| 1838 |
info->end_data = end_data; |
| 1839 |
info->start_stack = bprm->p; |
| 1840 |
|
| 1841 |
#if 0
|
| 1842 |
printf("(start_brk) %x\n" , info->start_brk);
|
| 1843 |
printf("(end_code) %x\n" , info->end_code);
|
| 1844 |
printf("(start_code) %x\n" , info->start_code);
|
| 1845 |
printf("(end_data) %x\n" , info->end_data);
|
| 1846 |
printf("(start_stack) %x\n" , info->start_stack);
|
| 1847 |
printf("(brk) %x\n" , info->brk);
|
| 1848 |
#endif
|
| 1849 |
|
| 1850 |
if ( info->personality == PER_SVR4 )
|
| 1851 |
{
|
| 1852 |
/* Why this, you ask??? Well SVr4 maps page 0 as read-only,
|
| 1853 |
and some applications "depend" upon this behavior.
|
| 1854 |
Since we do not have the power to recompile these, we
|
| 1855 |
emulate the SVr4 behavior. Sigh. */
|
| 1856 |
mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
|
| 1857 |
MAP_FIXED | MAP_PRIVATE, -1, 0); |
| 1858 |
} |
| 1859 |
|
| 1860 |
info->entry = elf_entry; |
| 1861 |
|
| 1862 |
#ifdef USE_ELF_CORE_DUMP
|
| 1863 |
bprm->core_dump = &elf_core_dump; |
| 1864 |
#endif
|
| 1865 |
|
| 1866 |
return 0; |
| 1867 |
} |
| 1868 |
|
| 1869 |
#ifdef USE_ELF_CORE_DUMP
|
| 1870 |
/*
|
| 1871 |
* Definitions to generate Intel SVR4-like core files.
|
| 1872 |
* These mostly have the same names as the SVR4 types with "target_elf_"
|
| 1873 |
* tacked on the front to prevent clashes with linux definitions,
|
| 1874 |
* and the typedef forms have been avoided. This is mostly like
|
| 1875 |
* the SVR4 structure, but more Linuxy, with things that Linux does
|
| 1876 |
* not support and which gdb doesn't really use excluded.
|
| 1877 |
*
|
| 1878 |
* Fields we don't dump (their contents is zero) in linux-user qemu
|
| 1879 |
* are marked with XXX.
|
| 1880 |
*
|
| 1881 |
* Core dump code is copied from linux kernel (fs/binfmt_elf.c).
|
| 1882 |
*
|
| 1883 |
* Porting ELF coredump for target is (quite) simple process. First you
|
| 1884 |
* define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
|
| 1885 |
* the target resides):
|
| 1886 |
*
|
| 1887 |
* #define USE_ELF_CORE_DUMP
|
| 1888 |
*
|
| 1889 |
* Next you define type of register set used for dumping. ELF specification
|
| 1890 |
* says that it needs to be array of elf_greg_t that has size of ELF_NREG.
|
| 1891 |
*
|
| 1892 |
* typedef <target_regtype> target_elf_greg_t;
|
| 1893 |
* #define ELF_NREG <number of registers>
|
| 1894 |
* typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
| 1895 |
*
|
| 1896 |
* Last step is to implement target specific function that copies registers
|
| 1897 |
* from given cpu into just specified register set. Prototype is:
|
| 1898 |
*
|
| 1899 |
* static void elf_core_copy_regs(taret_elf_gregset_t *regs,
|
| 1900 |
* const CPUState *env);
|
| 1901 |
*
|
| 1902 |
* Parameters:
|
| 1903 |
* regs - copy register values into here (allocated and zeroed by caller)
|
| 1904 |
* env - copy registers from here
|
| 1905 |
*
|
| 1906 |
* Example for ARM target is provided in this file.
|
| 1907 |
*/
|
| 1908 |
|
| 1909 |
/* An ELF note in memory */
|
| 1910 |
struct memelfnote {
|
| 1911 |
const char *name; |
| 1912 |
size_t namesz; |
| 1913 |
size_t namesz_rounded; |
| 1914 |
int type;
|
| 1915 |
size_t datasz; |
| 1916 |
void *data;
|
| 1917 |
size_t notesz; |
| 1918 |
}; |
| 1919 |
|
| 1920 |
struct target_elf_siginfo {
|
| 1921 |
int si_signo; /* signal number */ |
| 1922 |
int si_code; /* extra code */ |
| 1923 |
int si_errno; /* errno */ |
| 1924 |
}; |
| 1925 |
|
| 1926 |
struct target_elf_prstatus {
|
| 1927 |
struct target_elf_siginfo pr_info; /* Info associated with signal */ |
| 1928 |
short pr_cursig; /* Current signal */ |
| 1929 |
target_ulong pr_sigpend; /* XXX */
|
| 1930 |
target_ulong pr_sighold; /* XXX */
|
| 1931 |
target_pid_t pr_pid; |
| 1932 |
target_pid_t pr_ppid; |
| 1933 |
target_pid_t pr_pgrp; |
| 1934 |
target_pid_t pr_sid; |
| 1935 |
struct target_timeval pr_utime; /* XXX User time */ |
| 1936 |
struct target_timeval pr_stime; /* XXX System time */ |
| 1937 |
struct target_timeval pr_cutime; /* XXX Cumulative user time */ |
| 1938 |
struct target_timeval pr_cstime; /* XXX Cumulative system time */ |
| 1939 |
target_elf_gregset_t pr_reg; /* GP registers */
|
| 1940 |
int pr_fpvalid; /* XXX */ |
| 1941 |
}; |
| 1942 |
|
| 1943 |
#define ELF_PRARGSZ (80) /* Number of chars for args */ |
| 1944 |
|
| 1945 |
struct target_elf_prpsinfo {
|
| 1946 |
char pr_state; /* numeric process state */ |
| 1947 |
char pr_sname; /* char for pr_state */ |
| 1948 |
char pr_zomb; /* zombie */ |
| 1949 |
char pr_nice; /* nice val */ |
| 1950 |
target_ulong pr_flag; /* flags */
|
| 1951 |
target_uid_t pr_uid; |
| 1952 |
target_gid_t pr_gid; |
| 1953 |
target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; |
| 1954 |
/* Lots missing */
|
| 1955 |
char pr_fname[16]; /* filename of executable */ |
| 1956 |
char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ |
| 1957 |
}; |
| 1958 |
|
| 1959 |
/* Here is the structure in which status of each thread is captured. */
|
| 1960 |
struct elf_thread_status {
|
| 1961 |
QTAILQ_ENTRY(elf_thread_status) ets_link; |
| 1962 |
struct target_elf_prstatus prstatus; /* NT_PRSTATUS */ |
| 1963 |
#if 0
|
| 1964 |
elf_fpregset_t fpu; /* NT_PRFPREG */
|
| 1965 |
struct task_struct *thread;
|
| 1966 |
elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
|
| 1967 |
#endif
|
| 1968 |
struct memelfnote notes[1]; |
| 1969 |
int num_notes;
|
| 1970 |
}; |
| 1971 |
|
| 1972 |
struct elf_note_info {
|
| 1973 |
struct memelfnote *notes;
|
| 1974 |
struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */ |
| 1975 |
struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */ |
| 1976 |
|
| 1977 |
QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list; |
| 1978 |
#if 0
|
| 1979 |
/*
|
| 1980 |
* Current version of ELF coredump doesn't support
|
| 1981 |
* dumping fp regs etc.
|
| 1982 |
*/
|
| 1983 |
elf_fpregset_t *fpu;
|
| 1984 |
elf_fpxregset_t *xfpu;
|
| 1985 |
int thread_status_size;
|
| 1986 |
#endif
|
| 1987 |
int notes_size;
|
| 1988 |
int numnote;
|
| 1989 |
}; |
| 1990 |
|
| 1991 |
struct vm_area_struct {
|
| 1992 |
abi_ulong vma_start; /* start vaddr of memory region */
|
| 1993 |
abi_ulong vma_end; /* end vaddr of memory region */
|
| 1994 |
abi_ulong vma_flags; /* protection etc. flags for the region */
|
| 1995 |
QTAILQ_ENTRY(vm_area_struct) vma_link; |
| 1996 |
}; |
| 1997 |
|
| 1998 |
struct mm_struct {
|
| 1999 |
QTAILQ_HEAD(, vm_area_struct) mm_mmap; |
| 2000 |
int mm_count; /* number of mappings */ |
| 2001 |
}; |
| 2002 |
|
| 2003 |
static struct mm_struct *vma_init(void); |
| 2004 |
static void vma_delete(struct mm_struct *); |
| 2005 |
static int vma_add_mapping(struct mm_struct *, abi_ulong, |
| 2006 |
abi_ulong, abi_ulong); |
| 2007 |
static int vma_get_mapping_count(const struct mm_struct *); |
| 2008 |
static struct vm_area_struct *vma_first(const struct mm_struct *); |
| 2009 |
static struct vm_area_struct *vma_next(struct vm_area_struct *); |
| 2010 |
static abi_ulong vma_dump_size(const struct vm_area_struct *); |
| 2011 |
static int vma_walker(void *priv, abi_ulong start, abi_ulong end, |
| 2012 |
unsigned long flags); |
| 2013 |
|
| 2014 |
static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t); |
| 2015 |
static void fill_note(struct memelfnote *, const char *, int, |
| 2016 |
unsigned int, void *); |
| 2017 |
static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int); |
| 2018 |
static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *); |
| 2019 |
static void fill_auxv_note(struct memelfnote *, const TaskState *); |
| 2020 |
static void fill_elf_note_phdr(struct elf_phdr *, int, off_t); |
| 2021 |
static size_t note_size(const struct memelfnote *); |
| 2022 |
static void free_note_info(struct elf_note_info *); |
| 2023 |
static int fill_note_info(struct elf_note_info *, long, const CPUState *); |
| 2024 |
static void fill_thread_info(struct elf_note_info *, const CPUState *); |
| 2025 |
static int core_dump_filename(const TaskState *, char *, size_t); |
| 2026 |
|
| 2027 |
static int dump_write(int, const void *, size_t); |
| 2028 |
static int write_note(struct memelfnote *, int); |
| 2029 |
static int write_note_info(struct elf_note_info *, int); |
| 2030 |
|
| 2031 |
#ifdef BSWAP_NEEDED
|
| 2032 |
static void bswap_prstatus(struct target_elf_prstatus *prstatus) |
| 2033 |
{
|
| 2034 |
prstatus->pr_info.si_signo = tswapl(prstatus->pr_info.si_signo); |
| 2035 |
prstatus->pr_info.si_code = tswapl(prstatus->pr_info.si_code); |
| 2036 |
prstatus->pr_info.si_errno = tswapl(prstatus->pr_info.si_errno); |
| 2037 |
prstatus->pr_cursig = tswap16(prstatus->pr_cursig); |
| 2038 |
prstatus->pr_sigpend = tswapl(prstatus->pr_sigpend); |
| 2039 |
prstatus->pr_sighold = tswapl(prstatus->pr_sighold); |
| 2040 |
prstatus->pr_pid = tswap32(prstatus->pr_pid); |
| 2041 |
prstatus->pr_ppid = tswap32(prstatus->pr_ppid); |
| 2042 |
prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp); |
| 2043 |
prstatus->pr_sid = tswap32(prstatus->pr_sid); |
| 2044 |
/* cpu times are not filled, so we skip them */
|
| 2045 |
/* regs should be in correct format already */
|
| 2046 |
prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid); |
| 2047 |
} |
| 2048 |
|
| 2049 |
static void bswap_psinfo(struct target_elf_prpsinfo *psinfo) |
| 2050 |
{
|
| 2051 |
psinfo->pr_flag = tswapl(psinfo->pr_flag); |
| 2052 |
psinfo->pr_uid = tswap16(psinfo->pr_uid); |
| 2053 |
psinfo->pr_gid = tswap16(psinfo->pr_gid); |
| 2054 |
psinfo->pr_pid = tswap32(psinfo->pr_pid); |
| 2055 |
psinfo->pr_ppid = tswap32(psinfo->pr_ppid); |
| 2056 |
psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp); |
| 2057 |
psinfo->pr_sid = tswap32(psinfo->pr_sid); |
| 2058 |
} |
| 2059 |
|
| 2060 |
static void bswap_note(struct elf_note *en) |
| 2061 |
{
|
| 2062 |
bswap32s(&en->n_namesz); |
| 2063 |
bswap32s(&en->n_descsz); |
| 2064 |
bswap32s(&en->n_type); |
| 2065 |
} |
| 2066 |
#else
|
| 2067 |
static inline void bswap_prstatus(struct target_elf_prstatus *p) { } |
| 2068 |
static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {} |
| 2069 |
static inline void bswap_note(struct elf_note *en) { } |
| 2070 |
#endif /* BSWAP_NEEDED */ |
| 2071 |
|
| 2072 |
/*
|
| 2073 |
* Minimal support for linux memory regions. These are needed
|
| 2074 |
* when we are finding out what memory exactly belongs to
|
| 2075 |
* emulated process. No locks needed here, as long as
|
| 2076 |
* thread that received the signal is stopped.
|
| 2077 |
*/
|
| 2078 |
|
| 2079 |
static struct mm_struct *vma_init(void) |
| 2080 |
{
|
| 2081 |
struct mm_struct *mm;
|
| 2082 |
|
| 2083 |
if ((mm = qemu_malloc(sizeof (*mm))) == NULL) |
| 2084 |
return (NULL); |
| 2085 |
|
| 2086 |
mm->mm_count = 0;
|
| 2087 |
QTAILQ_INIT(&mm->mm_mmap); |
| 2088 |
|
| 2089 |
return (mm);
|
| 2090 |
} |
| 2091 |
|
| 2092 |
static void vma_delete(struct mm_struct *mm) |
| 2093 |
{
|
| 2094 |
struct vm_area_struct *vma;
|
| 2095 |
|
| 2096 |
while ((vma = vma_first(mm)) != NULL) { |
| 2097 |
QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link); |
| 2098 |
qemu_free(vma); |
| 2099 |
} |
| 2100 |
qemu_free(mm); |
| 2101 |
} |
| 2102 |
|
| 2103 |
static int vma_add_mapping(struct mm_struct *mm, abi_ulong start, |
| 2104 |
abi_ulong end, abi_ulong flags) |
| 2105 |
{
|
| 2106 |
struct vm_area_struct *vma;
|
| 2107 |
|
| 2108 |
if ((vma = qemu_mallocz(sizeof (*vma))) == NULL) |
| 2109 |
return (-1); |
| 2110 |
|
| 2111 |
vma->vma_start = start; |
| 2112 |
vma->vma_end = end; |
| 2113 |
vma->vma_flags = flags; |
| 2114 |
|
| 2115 |
QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link); |
| 2116 |
mm->mm_count++; |
| 2117 |
|
| 2118 |
return (0); |
| 2119 |
} |
| 2120 |
|
| 2121 |
static struct vm_area_struct *vma_first(const struct mm_struct *mm) |
| 2122 |
{
|
| 2123 |
return (QTAILQ_FIRST(&mm->mm_mmap));
|
| 2124 |
} |
| 2125 |
|
| 2126 |
static struct vm_area_struct *vma_next(struct vm_area_struct *vma) |
| 2127 |
{
|
| 2128 |
return (QTAILQ_NEXT(vma, vma_link));
|
| 2129 |
} |
| 2130 |
|
| 2131 |
static int vma_get_mapping_count(const struct mm_struct *mm) |
| 2132 |
{
|
| 2133 |
return (mm->mm_count);
|
| 2134 |
} |
| 2135 |
|
| 2136 |
/*
|
| 2137 |
* Calculate file (dump) size of given memory region.
|
| 2138 |
*/
|
| 2139 |
static abi_ulong vma_dump_size(const struct vm_area_struct *vma) |
| 2140 |
{
|
| 2141 |
/* if we cannot even read the first page, skip it */
|
| 2142 |
if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
|
| 2143 |
return (0); |
| 2144 |
|
| 2145 |
/*
|
| 2146 |
* Usually we don't dump executable pages as they contain
|
| 2147 |
* non-writable code that debugger can read directly from
|
| 2148 |
* target library etc. However, thread stacks are marked
|
| 2149 |
* also executable so we read in first page of given region
|
| 2150 |
* and check whether it contains elf header. If there is
|
| 2151 |
* no elf header, we dump it.
|
| 2152 |
*/
|
| 2153 |
if (vma->vma_flags & PROT_EXEC) {
|
| 2154 |
char page[TARGET_PAGE_SIZE];
|
| 2155 |
|
| 2156 |
copy_from_user(page, vma->vma_start, sizeof (page));
|
| 2157 |
if ((page[EI_MAG0] == ELFMAG0) &&
|
| 2158 |
(page[EI_MAG1] == ELFMAG1) && |
| 2159 |
(page[EI_MAG2] == ELFMAG2) && |
| 2160 |
(page[EI_MAG3] == ELFMAG3)) {
|
| 2161 |
/*
|
| 2162 |
* Mappings are possibly from ELF binary. Don't dump
|
| 2163 |
* them.
|
| 2164 |
*/
|
| 2165 |
return (0); |
| 2166 |
} |
| 2167 |
} |
| 2168 |
|
| 2169 |
return (vma->vma_end - vma->vma_start);
|
| 2170 |
} |
| 2171 |
|
| 2172 |
static int vma_walker(void *priv, abi_ulong start, abi_ulong end, |
| 2173 |
unsigned long flags) |
| 2174 |
{
|
| 2175 |
struct mm_struct *mm = (struct mm_struct *)priv; |
| 2176 |
|
| 2177 |
vma_add_mapping(mm, start, end, flags); |
| 2178 |
return (0); |
| 2179 |
} |
| 2180 |
|
| 2181 |
static void fill_note(struct memelfnote *note, const char *name, int type, |
| 2182 |
unsigned int sz, void *data) |
| 2183 |
{
|
| 2184 |
unsigned int namesz; |
| 2185 |
|
| 2186 |
namesz = strlen(name) + 1;
|
| 2187 |
note->name = name; |
| 2188 |
note->namesz = namesz; |
| 2189 |
note->namesz_rounded = roundup(namesz, sizeof (int32_t));
|
| 2190 |
note->type = type; |
| 2191 |
note->datasz = roundup(sz, sizeof (int32_t));;
|
| 2192 |
note->data = data; |
| 2193 |
|
| 2194 |
/*
|
| 2195 |
* We calculate rounded up note size here as specified by
|
| 2196 |
* ELF document.
|
| 2197 |
*/
|
| 2198 |
note->notesz = sizeof (struct elf_note) + |
| 2199 |
note->namesz_rounded + note->datasz; |
| 2200 |
} |
| 2201 |
|
| 2202 |
static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine, |
| 2203 |
uint32_t flags) |
| 2204 |
{
|
| 2205 |
(void) memset(elf, 0, sizeof(*elf)); |
| 2206 |
|
| 2207 |
(void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
|
| 2208 |
elf->e_ident[EI_CLASS] = ELF_CLASS; |
| 2209 |
elf->e_ident[EI_DATA] = ELF_DATA; |
| 2210 |
elf->e_ident[EI_VERSION] = EV_CURRENT; |
| 2211 |
elf->e_ident[EI_OSABI] = ELF_OSABI; |
| 2212 |
|
| 2213 |
elf->e_type = ET_CORE; |
| 2214 |
elf->e_machine = machine; |
| 2215 |
elf->e_version = EV_CURRENT; |
| 2216 |
elf->e_phoff = sizeof(struct elfhdr); |
| 2217 |
elf->e_flags = flags; |
| 2218 |
elf->e_ehsize = sizeof(struct elfhdr); |
| 2219 |
elf->e_phentsize = sizeof(struct elf_phdr); |
| 2220 |
elf->e_phnum = segs; |
| 2221 |
|
| 2222 |
bswap_ehdr(elf); |
| 2223 |
} |
| 2224 |
|
| 2225 |
static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset) |
| 2226 |
{
|
| 2227 |
phdr->p_type = PT_NOTE; |
| 2228 |
phdr->p_offset = offset; |
| 2229 |
phdr->p_vaddr = 0;
|
| 2230 |
phdr->p_paddr = 0;
|
| 2231 |
phdr->p_filesz = sz; |
| 2232 |
phdr->p_memsz = 0;
|
| 2233 |
phdr->p_flags = 0;
|
| 2234 |
phdr->p_align = 0;
|
| 2235 |
|
| 2236 |
bswap_phdr(phdr, 1);
|
| 2237 |
} |
| 2238 |
|
| 2239 |
static size_t note_size(const struct memelfnote *note) |
| 2240 |
{
|
| 2241 |
return (note->notesz);
|
| 2242 |
} |
| 2243 |
|
| 2244 |
static void fill_prstatus(struct target_elf_prstatus *prstatus, |
| 2245 |
const TaskState *ts, int signr) |
| 2246 |
{
|
| 2247 |
(void) memset(prstatus, 0, sizeof (*prstatus)); |
| 2248 |
prstatus->pr_info.si_signo = prstatus->pr_cursig = signr; |
| 2249 |
prstatus->pr_pid = ts->ts_tid; |
| 2250 |
prstatus->pr_ppid = getppid(); |
| 2251 |
prstatus->pr_pgrp = getpgrp(); |
| 2252 |
prstatus->pr_sid = getsid(0);
|
| 2253 |
|
| 2254 |
bswap_prstatus(prstatus); |
| 2255 |
} |
| 2256 |
|
| 2257 |
static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts) |
| 2258 |
{
|
| 2259 |
char *filename, *base_filename;
|
| 2260 |
unsigned int i, len; |
| 2261 |
|
| 2262 |
(void) memset(psinfo, 0, sizeof (*psinfo)); |
| 2263 |
|
| 2264 |
len = ts->info->arg_end - ts->info->arg_start; |
| 2265 |
if (len >= ELF_PRARGSZ)
|
| 2266 |
len = ELF_PRARGSZ - 1;
|
| 2267 |
if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
|
| 2268 |
return -EFAULT;
|
| 2269 |
for (i = 0; i < len; i++) |
| 2270 |
if (psinfo->pr_psargs[i] == 0) |
| 2271 |
psinfo->pr_psargs[i] = ' ';
|
| 2272 |
psinfo->pr_psargs[len] = 0;
|
| 2273 |
|
| 2274 |
psinfo->pr_pid = getpid(); |
| 2275 |
psinfo->pr_ppid = getppid(); |
| 2276 |
psinfo->pr_pgrp = getpgrp(); |
| 2277 |
psinfo->pr_sid = getsid(0);
|
| 2278 |
psinfo->pr_uid = getuid(); |
| 2279 |
psinfo->pr_gid = getgid(); |
| 2280 |
|
| 2281 |
filename = strdup(ts->bprm->filename); |
| 2282 |
base_filename = strdup(basename(filename)); |
| 2283 |
(void) strncpy(psinfo->pr_fname, base_filename,
|
| 2284 |
sizeof(psinfo->pr_fname));
|
| 2285 |
free(base_filename); |
| 2286 |
free(filename); |
| 2287 |
|
| 2288 |
bswap_psinfo(psinfo); |
| 2289 |
return (0); |
| 2290 |
} |
| 2291 |
|
| 2292 |
static void fill_auxv_note(struct memelfnote *note, const TaskState *ts) |
| 2293 |
{
|
| 2294 |
elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv; |
| 2295 |
elf_addr_t orig_auxv = auxv; |
| 2296 |
abi_ulong val; |
| 2297 |
void *ptr;
|
| 2298 |
int i, len;
|
| 2299 |
|
| 2300 |
/*
|
| 2301 |
* Auxiliary vector is stored in target process stack. It contains
|
| 2302 |
* {type, value} pairs that we need to dump into note. This is not
|
| 2303 |
* strictly necessary but we do it here for sake of completeness.
|
| 2304 |
*/
|
| 2305 |
|
| 2306 |
/* find out lenght of the vector, AT_NULL is terminator */
|
| 2307 |
i = len = 0;
|
| 2308 |
do {
|
| 2309 |
get_user_ual(val, auxv); |
| 2310 |
i += 2;
|
| 2311 |
auxv += 2 * sizeof (elf_addr_t); |
| 2312 |
} while (val != AT_NULL);
|
| 2313 |
len = i * sizeof (elf_addr_t);
|
| 2314 |
|
| 2315 |
/* read in whole auxv vector and copy it to memelfnote */
|
| 2316 |
ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
|
| 2317 |
if (ptr != NULL) { |
| 2318 |
fill_note(note, "CORE", NT_AUXV, len, ptr);
|
| 2319 |
unlock_user(ptr, auxv, len); |
| 2320 |
} |
| 2321 |
} |
| 2322 |
|
| 2323 |
/*
|
| 2324 |
* Constructs name of coredump file. We have following convention
|
| 2325 |
* for the name:
|
| 2326 |
* qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
|
| 2327 |
*
|
| 2328 |
* Returns 0 in case of success, -1 otherwise (errno is set).
|
| 2329 |
*/
|
| 2330 |
static int core_dump_filename(const TaskState *ts, char *buf, |
| 2331 |
size_t bufsize) |
| 2332 |
{
|
| 2333 |
char timestamp[64]; |
| 2334 |
char *filename = NULL; |
| 2335 |
char *base_filename = NULL; |
| 2336 |
struct timeval tv;
|
| 2337 |
struct tm tm;
|
| 2338 |
|
| 2339 |
assert(bufsize >= PATH_MAX); |
| 2340 |
|
| 2341 |
if (gettimeofday(&tv, NULL) < 0) { |
| 2342 |
(void) fprintf(stderr, "unable to get current timestamp: %s", |
| 2343 |
strerror(errno)); |
| 2344 |
return (-1); |
| 2345 |
} |
| 2346 |
|
| 2347 |
filename = strdup(ts->bprm->filename); |
| 2348 |
base_filename = strdup(basename(filename)); |
| 2349 |
(void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S", |
| 2350 |
localtime_r(&tv.tv_sec, &tm)); |
| 2351 |
(void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core", |
| 2352 |
base_filename, timestamp, (int)getpid());
|
| 2353 |
free(base_filename); |
| 2354 |
free(filename); |
| 2355 |
|
| 2356 |
return (0); |
| 2357 |
} |
| 2358 |
|
| 2359 |
static int dump_write(int fd, const void *ptr, size_t size) |
| 2360 |
{
|
| 2361 |
const char *bufp = (const char *)ptr; |
| 2362 |
ssize_t bytes_written, bytes_left; |
| 2363 |
struct rlimit dumpsize;
|
| 2364 |
off_t pos; |
| 2365 |
|
| 2366 |
bytes_written = 0;
|
| 2367 |
getrlimit(RLIMIT_CORE, &dumpsize); |
| 2368 |
if ((pos = lseek(fd, 0, SEEK_CUR))==-1) { |
| 2369 |
if (errno == ESPIPE) { /* not a seekable stream */ |
| 2370 |
bytes_left = size; |
| 2371 |
} else {
|
| 2372 |
return pos;
|
| 2373 |
} |
| 2374 |
} else {
|
| 2375 |
if (dumpsize.rlim_cur <= pos) {
|
| 2376 |
return -1; |
| 2377 |
} else if (dumpsize.rlim_cur == RLIM_INFINITY) { |
| 2378 |
bytes_left = size; |
| 2379 |
} else {
|
| 2380 |
size_t limit_left=dumpsize.rlim_cur - pos; |
| 2381 |
bytes_left = limit_left >= size ? size : limit_left ; |
| 2382 |
} |
| 2383 |
} |
| 2384 |
|
| 2385 |
/*
|
| 2386 |
* In normal conditions, single write(2) should do but
|
| 2387 |
* in case of socket etc. this mechanism is more portable.
|
| 2388 |
*/
|
| 2389 |
do {
|
| 2390 |
bytes_written = write(fd, bufp, bytes_left); |
| 2391 |
if (bytes_written < 0) { |
| 2392 |
if (errno == EINTR)
|
| 2393 |
continue;
|
| 2394 |
return (-1); |
| 2395 |
} else if (bytes_written == 0) { /* eof */ |
| 2396 |
return (-1); |
| 2397 |
} |
| 2398 |
bufp += bytes_written; |
| 2399 |
bytes_left -= bytes_written; |
| 2400 |
} while (bytes_left > 0); |
| 2401 |
|
| 2402 |
return (0); |
| 2403 |
} |
| 2404 |
|
| 2405 |
static int write_note(struct memelfnote *men, int fd) |
| 2406 |
{
|
| 2407 |
struct elf_note en;
|
| 2408 |
|
| 2409 |
en.n_namesz = men->namesz; |
| 2410 |
en.n_type = men->type; |
| 2411 |
en.n_descsz = men->datasz; |
| 2412 |
|
| 2413 |
bswap_note(&en); |
| 2414 |
|
| 2415 |
if (dump_write(fd, &en, sizeof(en)) != 0) |
| 2416 |
return (-1); |
| 2417 |
if (dump_write(fd, men->name, men->namesz_rounded) != 0) |
| 2418 |
return (-1); |
| 2419 |
if (dump_write(fd, men->data, men->datasz) != 0) |
| 2420 |
return (-1); |
| 2421 |
|
| 2422 |
return (0); |
| 2423 |
} |
| 2424 |
|
| 2425 |
static void fill_thread_info(struct elf_note_info *info, const CPUState *env) |
| 2426 |
{
|
| 2427 |
TaskState *ts = (TaskState *)env->opaque; |
| 2428 |
struct elf_thread_status *ets;
|
| 2429 |
|
| 2430 |
ets = qemu_mallocz(sizeof (*ets));
|
| 2431 |
ets->num_notes = 1; /* only prstatus is dumped */ |
| 2432 |
fill_prstatus(&ets->prstatus, ts, 0);
|
| 2433 |
elf_core_copy_regs(&ets->prstatus.pr_reg, env); |
| 2434 |
fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus), |
| 2435 |
&ets->prstatus); |
| 2436 |
|
| 2437 |
QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link); |
| 2438 |
|
| 2439 |
info->notes_size += note_size(&ets->notes[0]);
|
| 2440 |
} |
| 2441 |
|
| 2442 |
static int fill_note_info(struct elf_note_info *info, |
| 2443 |
long signr, const CPUState *env) |
| 2444 |
{
|
| 2445 |
#define NUMNOTES 3 |
| 2446 |
CPUState *cpu = NULL;
|
| 2447 |
TaskState *ts = (TaskState *)env->opaque; |
| 2448 |
int i;
|
| 2449 |
|
| 2450 |
(void) memset(info, 0, sizeof (*info)); |
| 2451 |
|
| 2452 |
QTAILQ_INIT(&info->thread_list); |
| 2453 |
|
| 2454 |
info->notes = qemu_mallocz(NUMNOTES * sizeof (struct memelfnote)); |
| 2455 |
if (info->notes == NULL) |
| 2456 |
return (-ENOMEM);
|
| 2457 |
info->prstatus = qemu_mallocz(sizeof (*info->prstatus));
|
| 2458 |
if (info->prstatus == NULL) |
| 2459 |
return (-ENOMEM);
|
| 2460 |
info->psinfo = qemu_mallocz(sizeof (*info->psinfo));
|
| 2461 |
if (info->prstatus == NULL) |
| 2462 |
return (-ENOMEM);
|
| 2463 |
|
| 2464 |
/*
|
| 2465 |
* First fill in status (and registers) of current thread
|
| 2466 |
* including process info & aux vector.
|
| 2467 |
*/
|
| 2468 |
fill_prstatus(info->prstatus, ts, signr); |
| 2469 |
elf_core_copy_regs(&info->prstatus->pr_reg, env); |
| 2470 |
fill_note(&info->notes[0], "CORE", NT_PRSTATUS, |
| 2471 |
sizeof (*info->prstatus), info->prstatus);
|
| 2472 |
fill_psinfo(info->psinfo, ts); |
| 2473 |
fill_note(&info->notes[1], "CORE", NT_PRPSINFO, |
| 2474 |
sizeof (*info->psinfo), info->psinfo);
|
| 2475 |
fill_auxv_note(&info->notes[2], ts);
|
| 2476 |
info->numnote = 3;
|
| 2477 |
|
| 2478 |
info->notes_size = 0;
|
| 2479 |
for (i = 0; i < info->numnote; i++) |
| 2480 |
info->notes_size += note_size(&info->notes[i]); |
| 2481 |
|
| 2482 |
/* read and fill status of all threads */
|
| 2483 |
cpu_list_lock(); |
| 2484 |
for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) { |
| 2485 |
if (cpu == thread_env)
|
| 2486 |
continue;
|
| 2487 |
fill_thread_info(info, cpu); |
| 2488 |
} |
| 2489 |
cpu_list_unlock(); |
| 2490 |
|
| 2491 |
return (0); |
| 2492 |
} |
| 2493 |
|
| 2494 |
static void free_note_info(struct elf_note_info *info) |
| 2495 |
{
|
| 2496 |
struct elf_thread_status *ets;
|
| 2497 |
|
| 2498 |
while (!QTAILQ_EMPTY(&info->thread_list)) {
|
| 2499 |
ets = QTAILQ_FIRST(&info->thread_list); |
| 2500 |
QTAILQ_REMOVE(&info->thread_list, ets, ets_link); |
| 2501 |
qemu_free(ets); |
| 2502 |
} |
| 2503 |
|
| 2504 |
qemu_free(info->prstatus); |
| 2505 |
qemu_free(info->psinfo); |
| 2506 |
qemu_free(info->notes); |
| 2507 |
} |
| 2508 |
|
| 2509 |
static int write_note_info(struct elf_note_info *info, int fd) |
| 2510 |
{
|
| 2511 |
struct elf_thread_status *ets;
|
| 2512 |
int i, error = 0; |
| 2513 |
|
| 2514 |
/* write prstatus, psinfo and auxv for current thread */
|
| 2515 |
for (i = 0; i < info->numnote; i++) |
| 2516 |
if ((error = write_note(&info->notes[i], fd)) != 0) |
| 2517 |
return (error);
|
| 2518 |
|
| 2519 |
/* write prstatus for each thread */
|
| 2520 |
for (ets = info->thread_list.tqh_first; ets != NULL; |
| 2521 |
ets = ets->ets_link.tqe_next) {
|
| 2522 |
if ((error = write_note(&ets->notes[0], fd)) != 0) |
| 2523 |
return (error);
|
| 2524 |
} |
| 2525 |
|
| 2526 |
return (0); |
| 2527 |
} |
| 2528 |
|
| 2529 |
/*
|
| 2530 |
* Write out ELF coredump.
|
| 2531 |
*
|
| 2532 |
* See documentation of ELF object file format in:
|
| 2533 |
* http://www.caldera.com/developers/devspecs/gabi41.pdf
|
| 2534 |
*
|
| 2535 |
* Coredump format in linux is following:
|
| 2536 |
*
|
| 2537 |
* 0 +----------------------+ \
|
| 2538 |
* | ELF header | ET_CORE |
|
| 2539 |
* +----------------------+ |
|
| 2540 |
* | ELF program headers | |--- headers
|
| 2541 |
* | - NOTE section | |
|
| 2542 |
* | - PT_LOAD sections | |
|
| 2543 |
* +----------------------+ /
|
| 2544 |
* | NOTEs: |
|
| 2545 |
* | - NT_PRSTATUS |
|
| 2546 |
* | - NT_PRSINFO |
|
| 2547 |
* | - NT_AUXV |
|
| 2548 |
* +----------------------+ <-- aligned to target page
|
| 2549 |
* | Process memory dump |
|
| 2550 |
* : :
|
| 2551 |
* . .
|
| 2552 |
* : :
|
| 2553 |
* | |
|
| 2554 |
* +----------------------+
|
| 2555 |
*
|
| 2556 |
* NT_PRSTATUS -> struct elf_prstatus (per thread)
|
| 2557 |
* NT_PRSINFO -> struct elf_prpsinfo
|
| 2558 |
* NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
|
| 2559 |
*
|
| 2560 |
* Format follows System V format as close as possible. Current
|
| 2561 |
* version limitations are as follows:
|
| 2562 |
* - no floating point registers are dumped
|
| 2563 |
*
|
| 2564 |
* Function returns 0 in case of success, negative errno otherwise.
|
| 2565 |
*
|
| 2566 |
* TODO: make this work also during runtime: it should be
|
| 2567 |
* possible to force coredump from running process and then
|
| 2568 |
* continue processing. For example qemu could set up SIGUSR2
|
| 2569 |
* handler (provided that target process haven't registered
|
| 2570 |
* handler for that) that does the dump when signal is received.
|
| 2571 |
*/
|
| 2572 |
static int elf_core_dump(int signr, const CPUState *env) |
| 2573 |
{
|
| 2574 |
const TaskState *ts = (const TaskState *)env->opaque; |
| 2575 |
struct vm_area_struct *vma = NULL; |
| 2576 |
char corefile[PATH_MAX];
|
| 2577 |
struct elf_note_info info;
|
| 2578 |
struct elfhdr elf;
|
| 2579 |
struct elf_phdr phdr;
|
| 2580 |
struct rlimit dumpsize;
|
| 2581 |
struct mm_struct *mm = NULL; |
| 2582 |
off_t offset = 0, data_offset = 0; |
| 2583 |
int segs = 0; |
| 2584 |
int fd = -1; |
| 2585 |
|
| 2586 |
errno = 0;
|
| 2587 |
getrlimit(RLIMIT_CORE, &dumpsize); |
| 2588 |
if (dumpsize.rlim_cur == 0) |
| 2589 |
return 0; |
| 2590 |
|
| 2591 |
if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0) |
| 2592 |
return (-errno);
|
| 2593 |
|
| 2594 |
if ((fd = open(corefile, O_WRONLY | O_CREAT,
|
| 2595 |
S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
|
| 2596 |
return (-errno);
|
| 2597 |
|
| 2598 |
/*
|
| 2599 |
* Walk through target process memory mappings and
|
| 2600 |
* set up structure containing this information. After
|
| 2601 |
* this point vma_xxx functions can be used.
|
| 2602 |
*/
|
| 2603 |
if ((mm = vma_init()) == NULL) |
| 2604 |
goto out;
|
| 2605 |
|
| 2606 |
walk_memory_regions(mm, vma_walker); |
| 2607 |
segs = vma_get_mapping_count(mm); |
| 2608 |
|
| 2609 |
/*
|
| 2610 |
* Construct valid coredump ELF header. We also
|
| 2611 |
* add one more segment for notes.
|
| 2612 |
*/
|
| 2613 |
fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0); |
| 2614 |
if (dump_write(fd, &elf, sizeof (elf)) != 0) |
| 2615 |
goto out;
|
| 2616 |
|
| 2617 |
/* fill in in-memory version of notes */
|
| 2618 |
if (fill_note_info(&info, signr, env) < 0) |
| 2619 |
goto out;
|
| 2620 |
|
| 2621 |
offset += sizeof (elf); /* elf header */ |
| 2622 |
offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */ |
| 2623 |
|
| 2624 |
/* write out notes program header */
|
| 2625 |
fill_elf_note_phdr(&phdr, info.notes_size, offset); |
| 2626 |
|
| 2627 |
offset += info.notes_size; |
| 2628 |
if (dump_write(fd, &phdr, sizeof (phdr)) != 0) |
| 2629 |
goto out;
|
| 2630 |
|
| 2631 |
/*
|
| 2632 |
* ELF specification wants data to start at page boundary so
|
| 2633 |
* we align it here.
|
| 2634 |
*/
|
| 2635 |
offset = roundup(offset, ELF_EXEC_PAGESIZE); |
| 2636 |
|
| 2637 |
/*
|
| 2638 |
* Write program headers for memory regions mapped in
|
| 2639 |
* the target process.
|
| 2640 |
*/
|
| 2641 |
for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) { |
| 2642 |
(void) memset(&phdr, 0, sizeof (phdr)); |
| 2643 |
|
| 2644 |
phdr.p_type = PT_LOAD; |
| 2645 |
phdr.p_offset = offset; |
| 2646 |
phdr.p_vaddr = vma->vma_start; |
| 2647 |
phdr.p_paddr = 0;
|
| 2648 |
phdr.p_filesz = vma_dump_size(vma); |
| 2649 |
offset += phdr.p_filesz; |
| 2650 |
phdr.p_memsz = vma->vma_end - vma->vma_start; |
| 2651 |
phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
|
| 2652 |
if (vma->vma_flags & PROT_WRITE)
|
| 2653 |
phdr.p_flags |= PF_W; |
| 2654 |
if (vma->vma_flags & PROT_EXEC)
|
| 2655 |
phdr.p_flags |= PF_X; |
| 2656 |
phdr.p_align = ELF_EXEC_PAGESIZE; |
| 2657 |
|
| 2658 |
dump_write(fd, &phdr, sizeof (phdr));
|
| 2659 |
} |
| 2660 |
|
| 2661 |
/*
|
| 2662 |
* Next we write notes just after program headers. No
|
| 2663 |
* alignment needed here.
|
| 2664 |
*/
|
| 2665 |
if (write_note_info(&info, fd) < 0) |
| 2666 |
goto out;
|
| 2667 |
|
| 2668 |
/* align data to page boundary */
|
| 2669 |
data_offset = lseek(fd, 0, SEEK_CUR);
|
| 2670 |
data_offset = TARGET_PAGE_ALIGN(data_offset); |
| 2671 |
if (lseek(fd, data_offset, SEEK_SET) != data_offset)
|
| 2672 |
goto out;
|
| 2673 |
|
| 2674 |
/*
|
| 2675 |
* Finally we can dump process memory into corefile as well.
|
| 2676 |
*/
|
| 2677 |
for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) { |
| 2678 |
abi_ulong addr; |
| 2679 |
abi_ulong end; |
| 2680 |
|
| 2681 |
end = vma->vma_start + vma_dump_size(vma); |
| 2682 |
|
| 2683 |
for (addr = vma->vma_start; addr < end;
|
| 2684 |
addr += TARGET_PAGE_SIZE) {
|
| 2685 |
char page[TARGET_PAGE_SIZE];
|
| 2686 |
int error;
|
| 2687 |
|
| 2688 |
/*
|
| 2689 |
* Read in page from target process memory and
|
| 2690 |
* write it to coredump file.
|
| 2691 |
*/
|
| 2692 |
error = copy_from_user(page, addr, sizeof (page));
|
| 2693 |
if (error != 0) { |
| 2694 |
(void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n", |
| 2695 |
addr); |
| 2696 |
errno = -error; |
| 2697 |
goto out;
|
| 2698 |
} |
| 2699 |
if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0) |
| 2700 |
goto out;
|
| 2701 |
} |
| 2702 |
} |
| 2703 |
|
| 2704 |
out:
|
| 2705 |
free_note_info(&info); |
| 2706 |
if (mm != NULL) |
| 2707 |
vma_delete(mm); |
| 2708 |
(void) close(fd);
|
| 2709 |
|
| 2710 |
if (errno != 0) |
| 2711 |
return (-errno);
|
| 2712 |
return (0); |
| 2713 |
} |
| 2714 |
|
| 2715 |
#endif /* USE_ELF_CORE_DUMP */ |
| 2716 |
|
| 2717 |
static int load_aout_interp(void * exptr, int interp_fd) |
| 2718 |
{
|
| 2719 |
printf("a.out interpreter not yet supported\n");
|
| 2720 |
return(0); |
| 2721 |
} |
| 2722 |
|
| 2723 |
void do_init_thread(struct target_pt_regs *regs, struct image_info *infop) |
| 2724 |
{
|
| 2725 |
init_thread(regs, infop); |
| 2726 |
} |