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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 descriptors |
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* (signal handling)
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*/
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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 |
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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_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_DATA ELFDATA2LSB
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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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typedef target_ulong target_elf_greg_t;
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typedef uint32_t target_uid_t;
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typedef uint32_t target_gid_t;
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typedef int32_t target_pid_t;
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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_DATA ELFDATA2LSB
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#define ELF_ARCH EM_386
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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->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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typedef target_ulong target_elf_greg_t;
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typedef uint16_t target_uid_t;
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typedef uint16_t target_gid_t;
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typedef int32_t target_pid_t;
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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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#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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#define ELF_ARCH EM_ARM
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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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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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typedef uint32_t target_elf_greg_t;
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typedef uint16_t target_uid_t;
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typedef uint16_t target_gid_t;
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typedef int32_t target_pid_t;
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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] = env->regs[0]; |
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(*regs)[1] = env->regs[1]; |
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(*regs)[2] = env->regs[2]; |
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(*regs)[3] = env->regs[3]; |
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(*regs)[4] = env->regs[4]; |
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(*regs)[5] = env->regs[5]; |
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(*regs)[6] = env->regs[6]; |
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(*regs)[7] = env->regs[7]; |
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(*regs)[8] = env->regs[8]; |
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(*regs)[9] = env->regs[9]; |
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(*regs)[10] = env->regs[10]; |
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(*regs)[11] = env->regs[11]; |
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(*regs)[12] = env->regs[12]; |
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(*regs)[13] = env->regs[13]; |
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(*regs)[14] = env->regs[14]; |
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(*regs)[15] = env->regs[15]; |
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(*regs)[16] = cpsr_read((CPUState *)env);
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(*regs)[17] = 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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}; |
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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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#endif
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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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#define ELF_CLASS ELFCLASS64
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#define ELF_DATA ELFDATA2MSB
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#define ELF_ARCH EM_SPARCV9
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#define STACK_BIAS 2047 |
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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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#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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#else
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#define ELF_START_MMAP 0x80000000 |
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#define elf_check_arch(x) ( (x) == EM_SPARC )
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#define ELF_CLASS ELFCLASS32
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#define ELF_DATA ELFDATA2MSB
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#define ELF_ARCH EM_SPARC
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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->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; |
392 |
} |
393 |
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#endif
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#endif
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|
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#ifdef TARGET_PPC
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#define ELF_START_MMAP 0x80000000 |
400 |
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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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|
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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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#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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#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,
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QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
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QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
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QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
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QEMU_PPC_FEATURE_NO_TB = 0x00100000,
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QEMU_PPC_FEATURE_POWER4 = 0x00080000,
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QEMU_PPC_FEATURE_POWER5 = 0x00040000,
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QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
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QEMU_PPC_FEATURE_CELL = 0x00010000,
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QEMU_PPC_FEATURE_BOOKE = 0x00008000,
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QEMU_PPC_FEATURE_SMT = 0x00004000,
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QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
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QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
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QEMU_PPC_FEATURE_PA6T = 0x00000800,
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QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
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QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
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QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
|
449 |
QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
|
450 |
QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
|
451 |
|
452 |
QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
|
453 |
QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
|
454 |
}; |
455 |
|
456 |
#define ELF_HWCAP get_elf_hwcap()
|
457 |
|
458 |
static uint32_t get_elf_hwcap(void) |
459 |
{ |
460 |
CPUState *e = thread_env; |
461 |
uint32_t features = 0;
|
462 |
|
463 |
/* We don't have to be terribly complete here; the high points are
|
464 |
Altivec/FP/SPE support. Anything else is just a bonus. */
|
465 |
#define GET_FEATURE(flag, feature) \
|
466 |
do {if (e->insns_flags & flag) features |= feature; } while(0) |
467 |
GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64); |
468 |
GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU); |
469 |
GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC); |
470 |
GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE); |
471 |
GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE); |
472 |
GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE); |
473 |
GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE); |
474 |
GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC); |
475 |
#undef GET_FEATURE
|
476 |
|
477 |
return features;
|
478 |
} |
479 |
|
480 |
/*
|
481 |
* We need to put in some extra aux table entries to tell glibc what
|
482 |
* the cache block size is, so it can use the dcbz instruction safely.
|
483 |
*/
|
484 |
#define AT_DCACHEBSIZE 19 |
485 |
#define AT_ICACHEBSIZE 20 |
486 |
#define AT_UCACHEBSIZE 21 |
487 |
/* A special ignored type value for PPC, for glibc compatibility. */
|
488 |
#define AT_IGNOREPPC 22 |
489 |
/*
|
490 |
* The requirements here are:
|
491 |
* - keep the final alignment of sp (sp & 0xf)
|
492 |
* - make sure the 32-bit value at the first 16 byte aligned position of
|
493 |
* AUXV is greater than 16 for glibc compatibility.
|
494 |
* AT_IGNOREPPC is used for that.
|
495 |
* - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
|
496 |
* even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
|
497 |
*/
|
498 |
#define DLINFO_ARCH_ITEMS 5 |
499 |
#define ARCH_DLINFO \
|
500 |
do { \
|
501 |
NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
|
502 |
NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
|
503 |
NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
|
504 |
/* \
|
505 |
* Now handle glibc compatibility. \
|
506 |
*/ \
|
507 |
NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
508 |
NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
509 |
} while (0) |
510 |
|
511 |
static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop) |
512 |
{ |
513 |
abi_ulong pos = infop->start_stack; |
514 |
abi_ulong tmp; |
515 |
#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
|
516 |
abi_ulong entry, toc; |
517 |
#endif
|
518 |
|
519 |
_regs->gpr[1] = infop->start_stack;
|
520 |
#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
|
521 |
entry = ldq_raw(infop->entry) + infop->load_addr; |
522 |
toc = ldq_raw(infop->entry + 8) + infop->load_addr;
|
523 |
_regs->gpr[2] = toc;
|
524 |
infop->entry = entry; |
525 |
#endif
|
526 |
_regs->nip = infop->entry; |
527 |
/* Note that isn't exactly what regular kernel does
|
528 |
* but this is what the ABI wants and is needed to allow
|
529 |
* execution of PPC BSD programs.
|
530 |
*/
|
531 |
/* FIXME - what to for failure of get_user()? */
|
532 |
get_user_ual(_regs->gpr[3], pos);
|
533 |
pos += sizeof(abi_ulong);
|
534 |
_regs->gpr[4] = pos;
|
535 |
for (tmp = 1; tmp != 0; pos += sizeof(abi_ulong)) |
536 |
tmp = ldl(pos); |
537 |
_regs->gpr[5] = pos;
|
538 |
} |
539 |
|
540 |
#define ELF_EXEC_PAGESIZE 4096 |
541 |
|
542 |
#endif
|
543 |
|
544 |
#ifdef TARGET_MIPS
|
545 |
|
546 |
#define ELF_START_MMAP 0x80000000 |
547 |
|
548 |
#define elf_check_arch(x) ( (x) == EM_MIPS )
|
549 |
|
550 |
#ifdef TARGET_MIPS64
|
551 |
#define ELF_CLASS ELFCLASS64
|
552 |
#else
|
553 |
#define ELF_CLASS ELFCLASS32
|
554 |
#endif
|
555 |
#ifdef TARGET_WORDS_BIGENDIAN
|
556 |
#define ELF_DATA ELFDATA2MSB
|
557 |
#else
|
558 |
#define ELF_DATA ELFDATA2LSB
|
559 |
#endif
|
560 |
#define ELF_ARCH EM_MIPS
|
561 |
|
562 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
563 |
{ |
564 |
regs->cp0_status = 2 << CP0St_KSU;
|
565 |
regs->cp0_epc = infop->entry; |
566 |
regs->regs[29] = infop->start_stack;
|
567 |
} |
568 |
|
569 |
#define ELF_EXEC_PAGESIZE 4096 |
570 |
|
571 |
#endif /* TARGET_MIPS */ |
572 |
|
573 |
#ifdef TARGET_MICROBLAZE
|
574 |
|
575 |
#define ELF_START_MMAP 0x80000000 |
576 |
|
577 |
#define elf_check_arch(x) ( (x) == EM_XILINX_MICROBLAZE )
|
578 |
|
579 |
#define ELF_CLASS ELFCLASS32
|
580 |
#define ELF_DATA ELFDATA2MSB
|
581 |
#define ELF_ARCH EM_MIPS
|
582 |
|
583 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
584 |
{ |
585 |
regs->pc = infop->entry; |
586 |
regs->r1 = infop->start_stack; |
587 |
|
588 |
} |
589 |
|
590 |
#define ELF_EXEC_PAGESIZE 4096 |
591 |
|
592 |
#endif /* TARGET_MICROBLAZE */ |
593 |
|
594 |
#ifdef TARGET_SH4
|
595 |
|
596 |
#define ELF_START_MMAP 0x80000000 |
597 |
|
598 |
#define elf_check_arch(x) ( (x) == EM_SH )
|
599 |
|
600 |
#define ELF_CLASS ELFCLASS32
|
601 |
#define ELF_DATA ELFDATA2LSB
|
602 |
#define ELF_ARCH EM_SH
|
603 |
|
604 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
605 |
{ |
606 |
/* Check other registers XXXXX */
|
607 |
regs->pc = infop->entry; |
608 |
regs->regs[15] = infop->start_stack;
|
609 |
} |
610 |
|
611 |
#define ELF_EXEC_PAGESIZE 4096 |
612 |
|
613 |
#endif
|
614 |
|
615 |
#ifdef TARGET_CRIS
|
616 |
|
617 |
#define ELF_START_MMAP 0x80000000 |
618 |
|
619 |
#define elf_check_arch(x) ( (x) == EM_CRIS )
|
620 |
|
621 |
#define ELF_CLASS ELFCLASS32
|
622 |
#define ELF_DATA ELFDATA2LSB
|
623 |
#define ELF_ARCH EM_CRIS
|
624 |
|
625 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
626 |
{ |
627 |
regs->erp = infop->entry; |
628 |
} |
629 |
|
630 |
#define ELF_EXEC_PAGESIZE 8192 |
631 |
|
632 |
#endif
|
633 |
|
634 |
#ifdef TARGET_M68K
|
635 |
|
636 |
#define ELF_START_MMAP 0x80000000 |
637 |
|
638 |
#define elf_check_arch(x) ( (x) == EM_68K )
|
639 |
|
640 |
#define ELF_CLASS ELFCLASS32
|
641 |
#define ELF_DATA ELFDATA2MSB
|
642 |
#define ELF_ARCH EM_68K
|
643 |
|
644 |
/* ??? Does this need to do anything?
|
645 |
#define ELF_PLAT_INIT(_r) */
|
646 |
|
647 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
648 |
{ |
649 |
regs->usp = infop->start_stack; |
650 |
regs->sr = 0;
|
651 |
regs->pc = infop->entry; |
652 |
} |
653 |
|
654 |
#define ELF_EXEC_PAGESIZE 8192 |
655 |
|
656 |
#endif
|
657 |
|
658 |
#ifdef TARGET_ALPHA
|
659 |
|
660 |
#define ELF_START_MMAP (0x30000000000ULL) |
661 |
|
662 |
#define elf_check_arch(x) ( (x) == ELF_ARCH )
|
663 |
|
664 |
#define ELF_CLASS ELFCLASS64
|
665 |
#define ELF_DATA ELFDATA2MSB
|
666 |
#define ELF_ARCH EM_ALPHA
|
667 |
|
668 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
669 |
{ |
670 |
regs->pc = infop->entry; |
671 |
regs->ps = 8;
|
672 |
regs->usp = infop->start_stack; |
673 |
regs->unique = infop->start_data; /* ? */
|
674 |
printf("Set unique value to " TARGET_FMT_lx " (" TARGET_FMT_lx ")\n", |
675 |
regs->unique, infop->start_data); |
676 |
} |
677 |
|
678 |
#define ELF_EXEC_PAGESIZE 8192 |
679 |
|
680 |
#endif /* TARGET_ALPHA */ |
681 |
|
682 |
#ifndef ELF_PLATFORM
|
683 |
#define ELF_PLATFORM (NULL) |
684 |
#endif
|
685 |
|
686 |
#ifndef ELF_HWCAP
|
687 |
#define ELF_HWCAP 0 |
688 |
#endif
|
689 |
|
690 |
#ifdef TARGET_ABI32
|
691 |
#undef ELF_CLASS
|
692 |
#define ELF_CLASS ELFCLASS32
|
693 |
#undef bswaptls
|
694 |
#define bswaptls(ptr) bswap32s(ptr)
|
695 |
#endif
|
696 |
|
697 |
#include "elf.h" |
698 |
|
699 |
struct exec
|
700 |
{ |
701 |
unsigned int a_info; /* Use macros N_MAGIC, etc for access */ |
702 |
unsigned int a_text; /* length of text, in bytes */ |
703 |
unsigned int a_data; /* length of data, in bytes */ |
704 |
unsigned int a_bss; /* length of uninitialized data area, in bytes */ |
705 |
unsigned int a_syms; /* length of symbol table data in file, in bytes */ |
706 |
unsigned int a_entry; /* start address */ |
707 |
unsigned int a_trsize; /* length of relocation info for text, in bytes */ |
708 |
unsigned int a_drsize; /* length of relocation info for data, in bytes */ |
709 |
}; |
710 |
|
711 |
|
712 |
#define N_MAGIC(exec) ((exec).a_info & 0xffff) |
713 |
#define OMAGIC 0407 |
714 |
#define NMAGIC 0410 |
715 |
#define ZMAGIC 0413 |
716 |
#define QMAGIC 0314 |
717 |
|
718 |
/* max code+data+bss space allocated to elf interpreter */
|
719 |
#define INTERP_MAP_SIZE (32 * 1024 * 1024) |
720 |
|
721 |
/* max code+data+bss+brk space allocated to ET_DYN executables */
|
722 |
#define ET_DYN_MAP_SIZE (128 * 1024 * 1024) |
723 |
|
724 |
/* Necessary parameters */
|
725 |
#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
|
726 |
#define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1)) |
727 |
#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1)) |
728 |
|
729 |
#define INTERPRETER_NONE 0 |
730 |
#define INTERPRETER_AOUT 1 |
731 |
#define INTERPRETER_ELF 2 |
732 |
|
733 |
#define DLINFO_ITEMS 12 |
734 |
|
735 |
static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) |
736 |
{ |
737 |
memcpy(to, from, n); |
738 |
} |
739 |
|
740 |
static int load_aout_interp(void * exptr, int interp_fd); |
741 |
|
742 |
#ifdef BSWAP_NEEDED
|
743 |
static void bswap_ehdr(struct elfhdr *ehdr) |
744 |
{ |
745 |
bswap16s(&ehdr->e_type); /* Object file type */
|
746 |
bswap16s(&ehdr->e_machine); /* Architecture */
|
747 |
bswap32s(&ehdr->e_version); /* Object file version */
|
748 |
bswaptls(&ehdr->e_entry); /* Entry point virtual address */
|
749 |
bswaptls(&ehdr->e_phoff); /* Program header table file offset */
|
750 |
bswaptls(&ehdr->e_shoff); /* Section header table file offset */
|
751 |
bswap32s(&ehdr->e_flags); /* Processor-specific flags */
|
752 |
bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
|
753 |
bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
|
754 |
bswap16s(&ehdr->e_phnum); /* Program header table entry count */
|
755 |
bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
|
756 |
bswap16s(&ehdr->e_shnum); /* Section header table entry count */
|
757 |
bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
|
758 |
} |
759 |
|
760 |
static void bswap_phdr(struct elf_phdr *phdr) |
761 |
{ |
762 |
bswap32s(&phdr->p_type); /* Segment type */
|
763 |
bswaptls(&phdr->p_offset); /* Segment file offset */
|
764 |
bswaptls(&phdr->p_vaddr); /* Segment virtual address */
|
765 |
bswaptls(&phdr->p_paddr); /* Segment physical address */
|
766 |
bswaptls(&phdr->p_filesz); /* Segment size in file */
|
767 |
bswaptls(&phdr->p_memsz); /* Segment size in memory */
|
768 |
bswap32s(&phdr->p_flags); /* Segment flags */
|
769 |
bswaptls(&phdr->p_align); /* Segment alignment */
|
770 |
} |
771 |
|
772 |
static void bswap_shdr(struct elf_shdr *shdr) |
773 |
{ |
774 |
bswap32s(&shdr->sh_name); |
775 |
bswap32s(&shdr->sh_type); |
776 |
bswaptls(&shdr->sh_flags); |
777 |
bswaptls(&shdr->sh_addr); |
778 |
bswaptls(&shdr->sh_offset); |
779 |
bswaptls(&shdr->sh_size); |
780 |
bswap32s(&shdr->sh_link); |
781 |
bswap32s(&shdr->sh_info); |
782 |
bswaptls(&shdr->sh_addralign); |
783 |
bswaptls(&shdr->sh_entsize); |
784 |
} |
785 |
|
786 |
static void bswap_sym(struct elf_sym *sym) |
787 |
{ |
788 |
bswap32s(&sym->st_name); |
789 |
bswaptls(&sym->st_value); |
790 |
bswaptls(&sym->st_size); |
791 |
bswap16s(&sym->st_shndx); |
792 |
} |
793 |
#endif
|
794 |
|
795 |
#ifdef USE_ELF_CORE_DUMP
|
796 |
static int elf_core_dump(int, const CPUState *); |
797 |
|
798 |
#ifdef BSWAP_NEEDED
|
799 |
static void bswap_note(struct elf_note *en) |
800 |
{ |
801 |
bswap32s(&en->n_namesz); |
802 |
bswap32s(&en->n_descsz); |
803 |
bswap32s(&en->n_type); |
804 |
} |
805 |
#endif /* BSWAP_NEEDED */ |
806 |
|
807 |
#endif /* USE_ELF_CORE_DUMP */ |
808 |
|
809 |
/*
|
810 |
* 'copy_elf_strings()' copies argument/envelope strings from user
|
811 |
* memory to free pages in kernel mem. These are in a format ready
|
812 |
* to be put directly into the top of new user memory.
|
813 |
*
|
814 |
*/
|
815 |
static abi_ulong copy_elf_strings(int argc,char ** argv, void **page, |
816 |
abi_ulong p) |
817 |
{ |
818 |
char *tmp, *tmp1, *pag = NULL; |
819 |
int len, offset = 0; |
820 |
|
821 |
if (!p) {
|
822 |
return 0; /* bullet-proofing */ |
823 |
} |
824 |
while (argc-- > 0) { |
825 |
tmp = argv[argc]; |
826 |
if (!tmp) {
|
827 |
fprintf(stderr, "VFS: argc is wrong");
|
828 |
exit(-1);
|
829 |
} |
830 |
tmp1 = tmp; |
831 |
while (*tmp++);
|
832 |
len = tmp - tmp1; |
833 |
if (p < len) { /* this shouldn't happen - 128kB */ |
834 |
return 0; |
835 |
} |
836 |
while (len) {
|
837 |
--p; --tmp; --len; |
838 |
if (--offset < 0) { |
839 |
offset = p % TARGET_PAGE_SIZE; |
840 |
pag = (char *)page[p/TARGET_PAGE_SIZE];
|
841 |
if (!pag) {
|
842 |
pag = (char *)malloc(TARGET_PAGE_SIZE);
|
843 |
memset(pag, 0, TARGET_PAGE_SIZE);
|
844 |
page[p/TARGET_PAGE_SIZE] = pag; |
845 |
if (!pag)
|
846 |
return 0; |
847 |
} |
848 |
} |
849 |
if (len == 0 || offset == 0) { |
850 |
*(pag + offset) = *tmp; |
851 |
} |
852 |
else {
|
853 |
int bytes_to_copy = (len > offset) ? offset : len;
|
854 |
tmp -= bytes_to_copy; |
855 |
p -= bytes_to_copy; |
856 |
offset -= bytes_to_copy; |
857 |
len -= bytes_to_copy; |
858 |
memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
|
859 |
} |
860 |
} |
861 |
} |
862 |
return p;
|
863 |
} |
864 |
|
865 |
static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm, |
866 |
struct image_info *info)
|
867 |
{ |
868 |
abi_ulong stack_base, size, error; |
869 |
int i;
|
870 |
|
871 |
/* Create enough stack to hold everything. If we don't use
|
872 |
* it for args, we'll use it for something else...
|
873 |
*/
|
874 |
size = x86_stack_size; |
875 |
if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE)
|
876 |
size = MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
877 |
error = target_mmap(0,
|
878 |
size + qemu_host_page_size, |
879 |
PROT_READ | PROT_WRITE, |
880 |
MAP_PRIVATE | MAP_ANONYMOUS, |
881 |
-1, 0); |
882 |
if (error == -1) { |
883 |
perror("stk mmap");
|
884 |
exit(-1);
|
885 |
} |
886 |
/* we reserve one extra page at the top of the stack as guard */
|
887 |
target_mprotect(error + size, qemu_host_page_size, PROT_NONE); |
888 |
|
889 |
stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
890 |
p += stack_base; |
891 |
|
892 |
for (i = 0 ; i < MAX_ARG_PAGES ; i++) { |
893 |
if (bprm->page[i]) {
|
894 |
info->rss++; |
895 |
/* FIXME - check return value of memcpy_to_target() for failure */
|
896 |
memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE); |
897 |
free(bprm->page[i]); |
898 |
} |
899 |
stack_base += TARGET_PAGE_SIZE; |
900 |
} |
901 |
return p;
|
902 |
} |
903 |
|
904 |
static void set_brk(abi_ulong start, abi_ulong end) |
905 |
{ |
906 |
/* page-align the start and end addresses... */
|
907 |
start = HOST_PAGE_ALIGN(start); |
908 |
end = HOST_PAGE_ALIGN(end); |
909 |
if (end <= start)
|
910 |
return;
|
911 |
if(target_mmap(start, end - start,
|
912 |
PROT_READ | PROT_WRITE | PROT_EXEC, |
913 |
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0) == -1) { |
914 |
perror("cannot mmap brk");
|
915 |
exit(-1);
|
916 |
} |
917 |
} |
918 |
|
919 |
|
920 |
/* We need to explicitly zero any fractional pages after the data
|
921 |
section (i.e. bss). This would contain the junk from the file that
|
922 |
should not be in memory. */
|
923 |
static void padzero(abi_ulong elf_bss, abi_ulong last_bss) |
924 |
{ |
925 |
abi_ulong nbyte; |
926 |
|
927 |
if (elf_bss >= last_bss)
|
928 |
return;
|
929 |
|
930 |
/* XXX: this is really a hack : if the real host page size is
|
931 |
smaller than the target page size, some pages after the end
|
932 |
of the file may not be mapped. A better fix would be to
|
933 |
patch target_mmap(), but it is more complicated as the file
|
934 |
size must be known */
|
935 |
if (qemu_real_host_page_size < qemu_host_page_size) {
|
936 |
abi_ulong end_addr, end_addr1; |
937 |
end_addr1 = (elf_bss + qemu_real_host_page_size - 1) &
|
938 |
~(qemu_real_host_page_size - 1);
|
939 |
end_addr = HOST_PAGE_ALIGN(elf_bss); |
940 |
if (end_addr1 < end_addr) {
|
941 |
mmap((void *)g2h(end_addr1), end_addr - end_addr1,
|
942 |
PROT_READ|PROT_WRITE|PROT_EXEC, |
943 |
MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
944 |
} |
945 |
} |
946 |
|
947 |
nbyte = elf_bss & (qemu_host_page_size-1);
|
948 |
if (nbyte) {
|
949 |
nbyte = qemu_host_page_size - nbyte; |
950 |
do {
|
951 |
/* FIXME - what to do if put_user() fails? */
|
952 |
put_user_u8(0, elf_bss);
|
953 |
elf_bss++; |
954 |
} while (--nbyte);
|
955 |
} |
956 |
} |
957 |
|
958 |
|
959 |
static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, |
960 |
struct elfhdr * exec,
|
961 |
abi_ulong load_addr, |
962 |
abi_ulong load_bias, |
963 |
abi_ulong interp_load_addr, int ibcs,
|
964 |
struct image_info *info)
|
965 |
{ |
966 |
abi_ulong sp; |
967 |
int size;
|
968 |
abi_ulong u_platform; |
969 |
const char *k_platform; |
970 |
const int n = sizeof(elf_addr_t); |
971 |
|
972 |
sp = p; |
973 |
u_platform = 0;
|
974 |
k_platform = ELF_PLATFORM; |
975 |
if (k_platform) {
|
976 |
size_t len = strlen(k_platform) + 1;
|
977 |
sp -= (len + n - 1) & ~(n - 1); |
978 |
u_platform = sp; |
979 |
/* FIXME - check return value of memcpy_to_target() for failure */
|
980 |
memcpy_to_target(sp, k_platform, len); |
981 |
} |
982 |
/*
|
983 |
* Force 16 byte _final_ alignment here for generality.
|
984 |
*/
|
985 |
sp = sp &~ (abi_ulong)15;
|
986 |
size = (DLINFO_ITEMS + 1) * 2; |
987 |
if (k_platform)
|
988 |
size += 2;
|
989 |
#ifdef DLINFO_ARCH_ITEMS
|
990 |
size += DLINFO_ARCH_ITEMS * 2;
|
991 |
#endif
|
992 |
size += envc + argc + 2;
|
993 |
size += (!ibcs ? 3 : 1); /* argc itself */ |
994 |
size *= n; |
995 |
if (size & 15) |
996 |
sp -= 16 - (size & 15); |
997 |
|
998 |
/* This is correct because Linux defines
|
999 |
* elf_addr_t as Elf32_Off / Elf64_Off
|
1000 |
*/
|
1001 |
#define NEW_AUX_ENT(id, val) do { \ |
1002 |
sp -= n; put_user_ual(val, sp); \ |
1003 |
sp -= n; put_user_ual(id, sp); \ |
1004 |
} while(0) |
1005 |
|
1006 |
NEW_AUX_ENT (AT_NULL, 0);
|
1007 |
|
1008 |
/* There must be exactly DLINFO_ITEMS entries here. */
|
1009 |
NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff)); |
1010 |
NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr))); |
1011 |
NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum)); |
1012 |
NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE)); |
1013 |
NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr)); |
1014 |
NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
|
1015 |
NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry); |
1016 |
NEW_AUX_ENT(AT_UID, (abi_ulong) getuid()); |
1017 |
NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid()); |
1018 |
NEW_AUX_ENT(AT_GID, (abi_ulong) getgid()); |
1019 |
NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid()); |
1020 |
NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP); |
1021 |
NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK)); |
1022 |
if (k_platform)
|
1023 |
NEW_AUX_ENT(AT_PLATFORM, u_platform); |
1024 |
#ifdef ARCH_DLINFO
|
1025 |
/*
|
1026 |
* ARCH_DLINFO must come last so platform specific code can enforce
|
1027 |
* special alignment requirements on the AUXV if necessary (eg. PPC).
|
1028 |
*/
|
1029 |
ARCH_DLINFO; |
1030 |
#endif
|
1031 |
#undef NEW_AUX_ENT
|
1032 |
|
1033 |
info->saved_auxv = sp; |
1034 |
|
1035 |
sp = loader_build_argptr(envc, argc, sp, p, !ibcs); |
1036 |
return sp;
|
1037 |
} |
1038 |
|
1039 |
|
1040 |
static abi_ulong load_elf_interp(struct elfhdr * interp_elf_ex, |
1041 |
int interpreter_fd,
|
1042 |
abi_ulong *interp_load_addr) |
1043 |
{ |
1044 |
struct elf_phdr *elf_phdata = NULL; |
1045 |
struct elf_phdr *eppnt;
|
1046 |
abi_ulong load_addr = 0;
|
1047 |
int load_addr_set = 0; |
1048 |
int retval;
|
1049 |
abi_ulong last_bss, elf_bss; |
1050 |
abi_ulong error; |
1051 |
int i;
|
1052 |
|
1053 |
elf_bss = 0;
|
1054 |
last_bss = 0;
|
1055 |
error = 0;
|
1056 |
|
1057 |
#ifdef BSWAP_NEEDED
|
1058 |
bswap_ehdr(interp_elf_ex); |
1059 |
#endif
|
1060 |
/* First of all, some simple consistency checks */
|
1061 |
if ((interp_elf_ex->e_type != ET_EXEC &&
|
1062 |
interp_elf_ex->e_type != ET_DYN) || |
1063 |
!elf_check_arch(interp_elf_ex->e_machine)) { |
1064 |
return ~((abi_ulong)0UL); |
1065 |
} |
1066 |
|
1067 |
|
1068 |
/* Now read in all of the header information */
|
1069 |
|
1070 |
if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE) |
1071 |
return ~(abi_ulong)0UL; |
1072 |
|
1073 |
elf_phdata = (struct elf_phdr *)
|
1074 |
malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); |
1075 |
|
1076 |
if (!elf_phdata)
|
1077 |
return ~((abi_ulong)0UL); |
1078 |
|
1079 |
/*
|
1080 |
* If the size of this structure has changed, then punt, since
|
1081 |
* we will be doing the wrong thing.
|
1082 |
*/
|
1083 |
if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) { |
1084 |
free(elf_phdata); |
1085 |
return ~((abi_ulong)0UL); |
1086 |
} |
1087 |
|
1088 |
retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET); |
1089 |
if(retval >= 0) { |
1090 |
retval = read(interpreter_fd, |
1091 |
(char *) elf_phdata,
|
1092 |
sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); |
1093 |
} |
1094 |
if (retval < 0) { |
1095 |
perror("load_elf_interp");
|
1096 |
exit(-1);
|
1097 |
free (elf_phdata); |
1098 |
return retval;
|
1099 |
} |
1100 |
#ifdef BSWAP_NEEDED
|
1101 |
eppnt = elf_phdata; |
1102 |
for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) { |
1103 |
bswap_phdr(eppnt); |
1104 |
} |
1105 |
#endif
|
1106 |
|
1107 |
if (interp_elf_ex->e_type == ET_DYN) {
|
1108 |
/* in order to avoid hardcoding the interpreter load
|
1109 |
address in qemu, we allocate a big enough memory zone */
|
1110 |
error = target_mmap(0, INTERP_MAP_SIZE,
|
1111 |
PROT_NONE, MAP_PRIVATE | MAP_ANON, |
1112 |
-1, 0); |
1113 |
if (error == -1) { |
1114 |
perror("mmap");
|
1115 |
exit(-1);
|
1116 |
} |
1117 |
load_addr = error; |
1118 |
load_addr_set = 1;
|
1119 |
} |
1120 |
|
1121 |
eppnt = elf_phdata; |
1122 |
for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) |
1123 |
if (eppnt->p_type == PT_LOAD) {
|
1124 |
int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
|
1125 |
int elf_prot = 0; |
1126 |
abi_ulong vaddr = 0;
|
1127 |
abi_ulong k; |
1128 |
|
1129 |
if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
|
1130 |
if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
|
1131 |
if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
|
1132 |
if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) {
|
1133 |
elf_type |= MAP_FIXED; |
1134 |
vaddr = eppnt->p_vaddr; |
1135 |
} |
1136 |
error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr), |
1137 |
eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr), |
1138 |
elf_prot, |
1139 |
elf_type, |
1140 |
interpreter_fd, |
1141 |
eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr)); |
1142 |
|
1143 |
if (error == -1) { |
1144 |
/* Real error */
|
1145 |
close(interpreter_fd); |
1146 |
free(elf_phdata); |
1147 |
return ~((abi_ulong)0UL); |
1148 |
} |
1149 |
|
1150 |
if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
|
1151 |
load_addr = error; |
1152 |
load_addr_set = 1;
|
1153 |
} |
1154 |
|
1155 |
/*
|
1156 |
* Find the end of the file mapping for this phdr, and keep
|
1157 |
* track of the largest address we see for this.
|
1158 |
*/
|
1159 |
k = load_addr + eppnt->p_vaddr + eppnt->p_filesz; |
1160 |
if (k > elf_bss) elf_bss = k;
|
1161 |
|
1162 |
/*
|
1163 |
* Do the same thing for the memory mapping - between
|
1164 |
* elf_bss and last_bss is the bss section.
|
1165 |
*/
|
1166 |
k = load_addr + eppnt->p_memsz + eppnt->p_vaddr; |
1167 |
if (k > last_bss) last_bss = k;
|
1168 |
} |
1169 |
|
1170 |
/* Now use mmap to map the library into memory. */
|
1171 |
|
1172 |
close(interpreter_fd); |
1173 |
|
1174 |
/*
|
1175 |
* Now fill out the bss section. First pad the last page up
|
1176 |
* to the page boundary, and then perform a mmap to make sure
|
1177 |
* that there are zeromapped pages up to and including the last
|
1178 |
* bss page.
|
1179 |
*/
|
1180 |
padzero(elf_bss, last_bss); |
1181 |
elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */ |
1182 |
|
1183 |
/* Map the last of the bss segment */
|
1184 |
if (last_bss > elf_bss) {
|
1185 |
target_mmap(elf_bss, last_bss-elf_bss, |
1186 |
PROT_READ|PROT_WRITE|PROT_EXEC, |
1187 |
MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
1188 |
} |
1189 |
free(elf_phdata); |
1190 |
|
1191 |
*interp_load_addr = load_addr; |
1192 |
return ((abi_ulong) interp_elf_ex->e_entry) + load_addr;
|
1193 |
} |
1194 |
|
1195 |
static int symfind(const void *s0, const void *s1) |
1196 |
{ |
1197 |
struct elf_sym *key = (struct elf_sym *)s0; |
1198 |
struct elf_sym *sym = (struct elf_sym *)s1; |
1199 |
int result = 0; |
1200 |
if (key->st_value < sym->st_value) {
|
1201 |
result = -1;
|
1202 |
} else if (key->st_value >= sym->st_value + sym->st_size) { |
1203 |
result = 1;
|
1204 |
} |
1205 |
return result;
|
1206 |
} |
1207 |
|
1208 |
static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr) |
1209 |
{ |
1210 |
#if ELF_CLASS == ELFCLASS32
|
1211 |
struct elf_sym *syms = s->disas_symtab.elf32;
|
1212 |
#else
|
1213 |
struct elf_sym *syms = s->disas_symtab.elf64;
|
1214 |
#endif
|
1215 |
|
1216 |
// binary search
|
1217 |
struct elf_sym key;
|
1218 |
struct elf_sym *sym;
|
1219 |
|
1220 |
key.st_value = orig_addr; |
1221 |
|
1222 |
sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), symfind);
|
1223 |
if (sym != NULL) { |
1224 |
return s->disas_strtab + sym->st_name;
|
1225 |
} |
1226 |
|
1227 |
return ""; |
1228 |
} |
1229 |
|
1230 |
/* FIXME: This should use elf_ops.h */
|
1231 |
static int symcmp(const void *s0, const void *s1) |
1232 |
{ |
1233 |
struct elf_sym *sym0 = (struct elf_sym *)s0; |
1234 |
struct elf_sym *sym1 = (struct elf_sym *)s1; |
1235 |
return (sym0->st_value < sym1->st_value)
|
1236 |
? -1
|
1237 |
: ((sym0->st_value > sym1->st_value) ? 1 : 0); |
1238 |
} |
1239 |
|
1240 |
/* Best attempt to load symbols from this ELF object. */
|
1241 |
static void load_symbols(struct elfhdr *hdr, int fd) |
1242 |
{ |
1243 |
unsigned int i, nsyms; |
1244 |
struct elf_shdr sechdr, symtab, strtab;
|
1245 |
char *strings;
|
1246 |
struct syminfo *s;
|
1247 |
struct elf_sym *syms;
|
1248 |
|
1249 |
lseek(fd, hdr->e_shoff, SEEK_SET); |
1250 |
for (i = 0; i < hdr->e_shnum; i++) { |
1251 |
if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr)) |
1252 |
return;
|
1253 |
#ifdef BSWAP_NEEDED
|
1254 |
bswap_shdr(&sechdr); |
1255 |
#endif
|
1256 |
if (sechdr.sh_type == SHT_SYMTAB) {
|
1257 |
symtab = sechdr; |
1258 |
lseek(fd, hdr->e_shoff |
1259 |
+ sizeof(sechdr) * sechdr.sh_link, SEEK_SET);
|
1260 |
if (read(fd, &strtab, sizeof(strtab)) |
1261 |
!= sizeof(strtab))
|
1262 |
return;
|
1263 |
#ifdef BSWAP_NEEDED
|
1264 |
bswap_shdr(&strtab); |
1265 |
#endif
|
1266 |
goto found;
|
1267 |
} |
1268 |
} |
1269 |
return; /* Shouldn't happen... */ |
1270 |
|
1271 |
found:
|
1272 |
/* Now know where the strtab and symtab are. Snarf them. */
|
1273 |
s = malloc(sizeof(*s));
|
1274 |
syms = malloc(symtab.sh_size); |
1275 |
if (!syms)
|
1276 |
return;
|
1277 |
s->disas_strtab = strings = malloc(strtab.sh_size); |
1278 |
if (!s->disas_strtab)
|
1279 |
return;
|
1280 |
|
1281 |
lseek(fd, symtab.sh_offset, SEEK_SET); |
1282 |
if (read(fd, syms, symtab.sh_size) != symtab.sh_size)
|
1283 |
return;
|
1284 |
|
1285 |
nsyms = symtab.sh_size / sizeof(struct elf_sym); |
1286 |
|
1287 |
i = 0;
|
1288 |
while (i < nsyms) {
|
1289 |
#ifdef BSWAP_NEEDED
|
1290 |
bswap_sym(syms + i); |
1291 |
#endif
|
1292 |
// Throw away entries which we do not need.
|
1293 |
if (syms[i].st_shndx == SHN_UNDEF ||
|
1294 |
syms[i].st_shndx >= SHN_LORESERVE || |
1295 |
ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) { |
1296 |
nsyms--; |
1297 |
if (i < nsyms) {
|
1298 |
syms[i] = syms[nsyms]; |
1299 |
} |
1300 |
continue;
|
1301 |
} |
1302 |
#if defined(TARGET_ARM) || defined (TARGET_MIPS)
|
1303 |
/* The bottom address bit marks a Thumb or MIPS16 symbol. */
|
1304 |
syms[i].st_value &= ~(target_ulong)1;
|
1305 |
#endif
|
1306 |
i++; |
1307 |
} |
1308 |
syms = realloc(syms, nsyms * sizeof(*syms));
|
1309 |
|
1310 |
qsort(syms, nsyms, sizeof(*syms), symcmp);
|
1311 |
|
1312 |
lseek(fd, strtab.sh_offset, SEEK_SET); |
1313 |
if (read(fd, strings, strtab.sh_size) != strtab.sh_size)
|
1314 |
return;
|
1315 |
s->disas_num_syms = nsyms; |
1316 |
#if ELF_CLASS == ELFCLASS32
|
1317 |
s->disas_symtab.elf32 = syms; |
1318 |
s->lookup_symbol = (lookup_symbol_t)lookup_symbolxx; |
1319 |
#else
|
1320 |
s->disas_symtab.elf64 = syms; |
1321 |
s->lookup_symbol = (lookup_symbol_t)lookup_symbolxx; |
1322 |
#endif
|
1323 |
s->next = syminfos; |
1324 |
syminfos = s; |
1325 |
} |
1326 |
|
1327 |
int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
1328 |
struct image_info * info)
|
1329 |
{ |
1330 |
struct elfhdr elf_ex;
|
1331 |
struct elfhdr interp_elf_ex;
|
1332 |
struct exec interp_ex;
|
1333 |
int interpreter_fd = -1; /* avoid warning */ |
1334 |
abi_ulong load_addr, load_bias; |
1335 |
int load_addr_set = 0; |
1336 |
unsigned int interpreter_type = INTERPRETER_NONE; |
1337 |
unsigned char ibcs2_interpreter; |
1338 |
int i;
|
1339 |
abi_ulong mapped_addr; |
1340 |
struct elf_phdr * elf_ppnt;
|
1341 |
struct elf_phdr *elf_phdata;
|
1342 |
abi_ulong elf_bss, k, elf_brk; |
1343 |
int retval;
|
1344 |
char * elf_interpreter;
|
1345 |
abi_ulong elf_entry, interp_load_addr = 0;
|
1346 |
int status;
|
1347 |
abi_ulong start_code, end_code, start_data, end_data; |
1348 |
abi_ulong reloc_func_desc = 0;
|
1349 |
abi_ulong elf_stack; |
1350 |
char passed_fileno[6]; |
1351 |
|
1352 |
ibcs2_interpreter = 0;
|
1353 |
status = 0;
|
1354 |
load_addr = 0;
|
1355 |
load_bias = 0;
|
1356 |
elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */ |
1357 |
#ifdef BSWAP_NEEDED
|
1358 |
bswap_ehdr(&elf_ex); |
1359 |
#endif
|
1360 |
|
1361 |
/* First of all, some simple consistency checks */
|
1362 |
if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||
|
1363 |
(! elf_check_arch(elf_ex.e_machine))) { |
1364 |
return -ENOEXEC;
|
1365 |
} |
1366 |
|
1367 |
bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
|
1368 |
bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p); |
1369 |
bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p); |
1370 |
if (!bprm->p) {
|
1371 |
retval = -E2BIG; |
1372 |
} |
1373 |
|
1374 |
/* Now read in all of the header information */
|
1375 |
elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum);
|
1376 |
if (elf_phdata == NULL) { |
1377 |
return -ENOMEM;
|
1378 |
} |
1379 |
|
1380 |
retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET); |
1381 |
if(retval > 0) { |
1382 |
retval = read(bprm->fd, (char *) elf_phdata,
|
1383 |
elf_ex.e_phentsize * elf_ex.e_phnum); |
1384 |
} |
1385 |
|
1386 |
if (retval < 0) { |
1387 |
perror("load_elf_binary");
|
1388 |
exit(-1);
|
1389 |
free (elf_phdata); |
1390 |
return -errno;
|
1391 |
} |
1392 |
|
1393 |
#ifdef BSWAP_NEEDED
|
1394 |
elf_ppnt = elf_phdata; |
1395 |
for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) { |
1396 |
bswap_phdr(elf_ppnt); |
1397 |
} |
1398 |
#endif
|
1399 |
elf_ppnt = elf_phdata; |
1400 |
|
1401 |
elf_bss = 0;
|
1402 |
elf_brk = 0;
|
1403 |
|
1404 |
|
1405 |
elf_stack = ~((abi_ulong)0UL);
|
1406 |
elf_interpreter = NULL;
|
1407 |
start_code = ~((abi_ulong)0UL);
|
1408 |
end_code = 0;
|
1409 |
start_data = 0;
|
1410 |
end_data = 0;
|
1411 |
interp_ex.a_info = 0;
|
1412 |
|
1413 |
for(i=0;i < elf_ex.e_phnum; i++) { |
1414 |
if (elf_ppnt->p_type == PT_INTERP) {
|
1415 |
if ( elf_interpreter != NULL ) |
1416 |
{ |
1417 |
free (elf_phdata); |
1418 |
free(elf_interpreter); |
1419 |
close(bprm->fd); |
1420 |
return -EINVAL;
|
1421 |
} |
1422 |
|
1423 |
/* This is the program interpreter used for
|
1424 |
* shared libraries - for now assume that this
|
1425 |
* is an a.out format binary
|
1426 |
*/
|
1427 |
|
1428 |
elf_interpreter = (char *)malloc(elf_ppnt->p_filesz);
|
1429 |
|
1430 |
if (elf_interpreter == NULL) { |
1431 |
free (elf_phdata); |
1432 |
close(bprm->fd); |
1433 |
return -ENOMEM;
|
1434 |
} |
1435 |
|
1436 |
retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET); |
1437 |
if(retval >= 0) { |
1438 |
retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz); |
1439 |
} |
1440 |
if(retval < 0) { |
1441 |
perror("load_elf_binary2");
|
1442 |
exit(-1);
|
1443 |
} |
1444 |
|
1445 |
/* If the program interpreter is one of these two,
|
1446 |
then assume an iBCS2 image. Otherwise assume
|
1447 |
a native linux image. */
|
1448 |
|
1449 |
/* JRP - Need to add X86 lib dir stuff here... */
|
1450 |
|
1451 |
if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 || |
1452 |
strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) { |
1453 |
ibcs2_interpreter = 1;
|
1454 |
} |
1455 |
|
1456 |
#if 0
|
1457 |
printf("Using ELF interpreter %s\n", path(elf_interpreter));
|
1458 |
#endif
|
1459 |
if (retval >= 0) { |
1460 |
retval = open(path(elf_interpreter), O_RDONLY); |
1461 |
if(retval >= 0) { |
1462 |
interpreter_fd = retval; |
1463 |
} |
1464 |
else {
|
1465 |
perror(elf_interpreter); |
1466 |
exit(-1);
|
1467 |
/* retval = -errno; */
|
1468 |
} |
1469 |
} |
1470 |
|
1471 |
if (retval >= 0) { |
1472 |
retval = lseek(interpreter_fd, 0, SEEK_SET);
|
1473 |
if(retval >= 0) { |
1474 |
retval = read(interpreter_fd,bprm->buf,128);
|
1475 |
} |
1476 |
} |
1477 |
if (retval >= 0) { |
1478 |
interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */ |
1479 |
interp_elf_ex = *((struct elfhdr *) bprm->buf); /* elf exec-header */ |
1480 |
} |
1481 |
if (retval < 0) { |
1482 |
perror("load_elf_binary3");
|
1483 |
exit(-1);
|
1484 |
free (elf_phdata); |
1485 |
free(elf_interpreter); |
1486 |
close(bprm->fd); |
1487 |
return retval;
|
1488 |
} |
1489 |
} |
1490 |
elf_ppnt++; |
1491 |
} |
1492 |
|
1493 |
/* Some simple consistency checks for the interpreter */
|
1494 |
if (elf_interpreter){
|
1495 |
interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT; |
1496 |
|
1497 |
/* Now figure out which format our binary is */
|
1498 |
if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) &&
|
1499 |
(N_MAGIC(interp_ex) != QMAGIC)) { |
1500 |
interpreter_type = INTERPRETER_ELF; |
1501 |
} |
1502 |
|
1503 |
if (interp_elf_ex.e_ident[0] != 0x7f || |
1504 |
strncmp((char *)&interp_elf_ex.e_ident[1], "ELF",3) != 0) { |
1505 |
interpreter_type &= ~INTERPRETER_ELF; |
1506 |
} |
1507 |
|
1508 |
if (!interpreter_type) {
|
1509 |
free(elf_interpreter); |
1510 |
free(elf_phdata); |
1511 |
close(bprm->fd); |
1512 |
return -ELIBBAD;
|
1513 |
} |
1514 |
} |
1515 |
|
1516 |
/* OK, we are done with that, now set up the arg stuff,
|
1517 |
and then start this sucker up */
|
1518 |
|
1519 |
{ |
1520 |
char * passed_p;
|
1521 |
|
1522 |
if (interpreter_type == INTERPRETER_AOUT) {
|
1523 |
snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd); |
1524 |
passed_p = passed_fileno; |
1525 |
|
1526 |
if (elf_interpreter) {
|
1527 |
bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p);
|
1528 |
bprm->argc++; |
1529 |
} |
1530 |
} |
1531 |
if (!bprm->p) {
|
1532 |
if (elf_interpreter) {
|
1533 |
free(elf_interpreter); |
1534 |
} |
1535 |
free (elf_phdata); |
1536 |
close(bprm->fd); |
1537 |
return -E2BIG;
|
1538 |
} |
1539 |
} |
1540 |
|
1541 |
/* OK, This is the point of no return */
|
1542 |
info->end_data = 0;
|
1543 |
info->end_code = 0;
|
1544 |
info->start_mmap = (abi_ulong)ELF_START_MMAP; |
1545 |
info->mmap = 0;
|
1546 |
elf_entry = (abi_ulong) elf_ex.e_entry; |
1547 |
|
1548 |
#if defined(CONFIG_USE_GUEST_BASE)
|
1549 |
/*
|
1550 |
* In case where user has not explicitly set the guest_base, we
|
1551 |
* probe here that should we set it automatically.
|
1552 |
*/
|
1553 |
if (!have_guest_base) {
|
1554 |
/*
|
1555 |
* Go through ELF program header table and find out whether
|
1556 |
* any of the segments drop below our current mmap_min_addr and
|
1557 |
* in that case set guest_base to corresponding address.
|
1558 |
*/
|
1559 |
for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; |
1560 |
i++, elf_ppnt++) { |
1561 |
if (elf_ppnt->p_type != PT_LOAD)
|
1562 |
continue;
|
1563 |
if (HOST_PAGE_ALIGN(elf_ppnt->p_vaddr) < mmap_min_addr) {
|
1564 |
guest_base = HOST_PAGE_ALIGN(mmap_min_addr); |
1565 |
break;
|
1566 |
} |
1567 |
} |
1568 |
} |
1569 |
#endif /* CONFIG_USE_GUEST_BASE */ |
1570 |
|
1571 |
/* Do this so that we can load the interpreter, if need be. We will
|
1572 |
change some of these later */
|
1573 |
info->rss = 0;
|
1574 |
bprm->p = setup_arg_pages(bprm->p, bprm, info); |
1575 |
info->start_stack = bprm->p; |
1576 |
|
1577 |
/* Now we do a little grungy work by mmaping the ELF image into
|
1578 |
* the correct location in memory. At this point, we assume that
|
1579 |
* the image should be loaded at fixed address, not at a variable
|
1580 |
* address.
|
1581 |
*/
|
1582 |
|
1583 |
for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) { |
1584 |
int elf_prot = 0; |
1585 |
int elf_flags = 0; |
1586 |
abi_ulong error; |
1587 |
|
1588 |
if (elf_ppnt->p_type != PT_LOAD)
|
1589 |
continue;
|
1590 |
|
1591 |
if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
|
1592 |
if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
|
1593 |
if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
|
1594 |
elf_flags = MAP_PRIVATE | MAP_DENYWRITE; |
1595 |
if (elf_ex.e_type == ET_EXEC || load_addr_set) {
|
1596 |
elf_flags |= MAP_FIXED; |
1597 |
} else if (elf_ex.e_type == ET_DYN) { |
1598 |
/* Try and get dynamic programs out of the way of the default mmap
|
1599 |
base, as well as whatever program they might try to exec. This
|
1600 |
is because the brk will follow the loader, and is not movable. */
|
1601 |
/* NOTE: for qemu, we do a big mmap to get enough space
|
1602 |
without hardcoding any address */
|
1603 |
error = target_mmap(0, ET_DYN_MAP_SIZE,
|
1604 |
PROT_NONE, MAP_PRIVATE | MAP_ANON, |
1605 |
-1, 0); |
1606 |
if (error == -1) { |
1607 |
perror("mmap");
|
1608 |
exit(-1);
|
1609 |
} |
1610 |
load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr); |
1611 |
} |
1612 |
|
1613 |
error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr), |
1614 |
(elf_ppnt->p_filesz + |
1615 |
TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)), |
1616 |
elf_prot, |
1617 |
(MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE), |
1618 |
bprm->fd, |
1619 |
(elf_ppnt->p_offset - |
1620 |
TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr))); |
1621 |
if (error == -1) { |
1622 |
perror("mmap");
|
1623 |
exit(-1);
|
1624 |
} |
1625 |
|
1626 |
#ifdef LOW_ELF_STACK
|
1627 |
if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
|
1628 |
elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr); |
1629 |
#endif
|
1630 |
|
1631 |
if (!load_addr_set) {
|
1632 |
load_addr_set = 1;
|
1633 |
load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset; |
1634 |
if (elf_ex.e_type == ET_DYN) {
|
1635 |
load_bias += error - |
1636 |
TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr); |
1637 |
load_addr += load_bias; |
1638 |
reloc_func_desc = load_bias; |
1639 |
} |
1640 |
} |
1641 |
k = elf_ppnt->p_vaddr; |
1642 |
if (k < start_code)
|
1643 |
start_code = k; |
1644 |
if (start_data < k)
|
1645 |
start_data = k; |
1646 |
k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; |
1647 |
if (k > elf_bss)
|
1648 |
elf_bss = k; |
1649 |
if ((elf_ppnt->p_flags & PF_X) && end_code < k)
|
1650 |
end_code = k; |
1651 |
if (end_data < k)
|
1652 |
end_data = k; |
1653 |
k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz; |
1654 |
if (k > elf_brk) elf_brk = k;
|
1655 |
} |
1656 |
|
1657 |
elf_entry += load_bias; |
1658 |
elf_bss += load_bias; |
1659 |
elf_brk += load_bias; |
1660 |
start_code += load_bias; |
1661 |
end_code += load_bias; |
1662 |
start_data += load_bias; |
1663 |
end_data += load_bias; |
1664 |
|
1665 |
if (elf_interpreter) {
|
1666 |
if (interpreter_type & 1) { |
1667 |
elf_entry = load_aout_interp(&interp_ex, interpreter_fd); |
1668 |
} |
1669 |
else if (interpreter_type & 2) { |
1670 |
elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd, |
1671 |
&interp_load_addr); |
1672 |
} |
1673 |
reloc_func_desc = interp_load_addr; |
1674 |
|
1675 |
close(interpreter_fd); |
1676 |
free(elf_interpreter); |
1677 |
|
1678 |
if (elf_entry == ~((abi_ulong)0UL)) { |
1679 |
printf("Unable to load interpreter\n");
|
1680 |
free(elf_phdata); |
1681 |
exit(-1);
|
1682 |
return 0; |
1683 |
} |
1684 |
} |
1685 |
|
1686 |
free(elf_phdata); |
1687 |
|
1688 |
if (qemu_log_enabled())
|
1689 |
load_symbols(&elf_ex, bprm->fd); |
1690 |
|
1691 |
if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd);
|
1692 |
info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX); |
1693 |
|
1694 |
#ifdef LOW_ELF_STACK
|
1695 |
info->start_stack = bprm->p = elf_stack - 4;
|
1696 |
#endif
|
1697 |
bprm->p = create_elf_tables(bprm->p, |
1698 |
bprm->argc, |
1699 |
bprm->envc, |
1700 |
&elf_ex, |
1701 |
load_addr, load_bias, |
1702 |
interp_load_addr, |
1703 |
(interpreter_type == INTERPRETER_AOUT ? 0 : 1), |
1704 |
info); |
1705 |
info->load_addr = reloc_func_desc; |
1706 |
info->start_brk = info->brk = elf_brk; |
1707 |
info->end_code = end_code; |
1708 |
info->start_code = start_code; |
1709 |
info->start_data = start_data; |
1710 |
info->end_data = end_data; |
1711 |
info->start_stack = bprm->p; |
1712 |
|
1713 |
/* Calling set_brk effectively mmaps the pages that we need for the bss and break
|
1714 |
sections */
|
1715 |
set_brk(elf_bss, elf_brk); |
1716 |
|
1717 |
padzero(elf_bss, elf_brk); |
1718 |
|
1719 |
#if 0
|
1720 |
printf("(start_brk) %x\n" , info->start_brk);
|
1721 |
printf("(end_code) %x\n" , info->end_code);
|
1722 |
printf("(start_code) %x\n" , info->start_code);
|
1723 |
printf("(end_data) %x\n" , info->end_data);
|
1724 |
printf("(start_stack) %x\n" , info->start_stack);
|
1725 |
printf("(brk) %x\n" , info->brk);
|
1726 |
#endif
|
1727 |
|
1728 |
if ( info->personality == PER_SVR4 )
|
1729 |
{ |
1730 |
/* Why this, you ask??? Well SVr4 maps page 0 as read-only,
|
1731 |
and some applications "depend" upon this behavior.
|
1732 |
Since we do not have the power to recompile these, we
|
1733 |
emulate the SVr4 behavior. Sigh. */
|
1734 |
mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
|
1735 |
MAP_FIXED | MAP_PRIVATE, -1, 0); |
1736 |
} |
1737 |
|
1738 |
info->entry = elf_entry; |
1739 |
|
1740 |
#ifdef USE_ELF_CORE_DUMP
|
1741 |
bprm->core_dump = &elf_core_dump; |
1742 |
#endif
|
1743 |
|
1744 |
return 0; |
1745 |
} |
1746 |
|
1747 |
#ifdef USE_ELF_CORE_DUMP
|
1748 |
|
1749 |
/*
|
1750 |
* Definitions to generate Intel SVR4-like core files.
|
1751 |
* These mostly have the same names as the SVR4 types with "target_elf_"
|
1752 |
* tacked on the front to prevent clashes with linux definitions,
|
1753 |
* and the typedef forms have been avoided. This is mostly like
|
1754 |
* the SVR4 structure, but more Linuxy, with things that Linux does
|
1755 |
* not support and which gdb doesn't really use excluded.
|
1756 |
*
|
1757 |
* Fields we don't dump (their contents is zero) in linux-user qemu
|
1758 |
* are marked with XXX.
|
1759 |
*
|
1760 |
* Core dump code is copied from linux kernel (fs/binfmt_elf.c).
|
1761 |
*
|
1762 |
* Porting ELF coredump for target is (quite) simple process. First you
|
1763 |
* define ELF_USE_CORE_DUMP in target ELF code (where init_thread() for
|
1764 |
* the target resides):
|
1765 |
*
|
1766 |
* #define USE_ELF_CORE_DUMP
|
1767 |
*
|
1768 |
* Next you define type of register set used for dumping. ELF specification
|
1769 |
* says that it needs to be array of elf_greg_t that has size of ELF_NREG.
|
1770 |
*
|
1771 |
* typedef <target_regtype> target_elf_greg_t;
|
1772 |
* #define ELF_NREG <number of registers>
|
1773 |
* typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
1774 |
*
|
1775 |
* Then define following types to match target types. Actual types can
|
1776 |
* be found from linux kernel (arch/<ARCH>/include/asm/posix_types.h):
|
1777 |
*
|
1778 |
* typedef <target_uid_type> target_uid_t;
|
1779 |
* typedef <target_gid_type> target_gid_t;
|
1780 |
* typedef <target_pid_type> target_pid_t;
|
1781 |
*
|
1782 |
* Last step is to implement target specific function that copies registers
|
1783 |
* from given cpu into just specified register set. Prototype is:
|
1784 |
*
|
1785 |
* static void elf_core_copy_regs(taret_elf_gregset_t *regs,
|
1786 |
* const CPUState *env);
|
1787 |
*
|
1788 |
* Parameters:
|
1789 |
* regs - copy register values into here (allocated and zeroed by caller)
|
1790 |
* env - copy registers from here
|
1791 |
*
|
1792 |
* Example for ARM target is provided in this file.
|
1793 |
*/
|
1794 |
|
1795 |
/* An ELF note in memory */
|
1796 |
struct memelfnote {
|
1797 |
const char *name; |
1798 |
size_t namesz; |
1799 |
size_t namesz_rounded; |
1800 |
int type;
|
1801 |
size_t datasz; |
1802 |
void *data;
|
1803 |
size_t notesz; |
1804 |
}; |
1805 |
|
1806 |
struct target_elf_siginfo {
|
1807 |
int si_signo; /* signal number */ |
1808 |
int si_code; /* extra code */ |
1809 |
int si_errno; /* errno */ |
1810 |
}; |
1811 |
|
1812 |
struct target_elf_prstatus {
|
1813 |
struct target_elf_siginfo pr_info; /* Info associated with signal */ |
1814 |
short pr_cursig; /* Current signal */ |
1815 |
target_ulong pr_sigpend; /* XXX */
|
1816 |
target_ulong pr_sighold; /* XXX */
|
1817 |
target_pid_t pr_pid; |
1818 |
target_pid_t pr_ppid; |
1819 |
target_pid_t pr_pgrp; |
1820 |
target_pid_t pr_sid; |
1821 |
struct target_timeval pr_utime; /* XXX User time */ |
1822 |
struct target_timeval pr_stime; /* XXX System time */ |
1823 |
struct target_timeval pr_cutime; /* XXX Cumulative user time */ |
1824 |
struct target_timeval pr_cstime; /* XXX Cumulative system time */ |
1825 |
target_elf_gregset_t pr_reg; /* GP registers */
|
1826 |
int pr_fpvalid; /* XXX */ |
1827 |
}; |
1828 |
|
1829 |
#define ELF_PRARGSZ (80) /* Number of chars for args */ |
1830 |
|
1831 |
struct target_elf_prpsinfo {
|
1832 |
char pr_state; /* numeric process state */ |
1833 |
char pr_sname; /* char for pr_state */ |
1834 |
char pr_zomb; /* zombie */ |
1835 |
char pr_nice; /* nice val */ |
1836 |
target_ulong pr_flag; /* flags */
|
1837 |
target_uid_t pr_uid; |
1838 |
target_gid_t pr_gid; |
1839 |
target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; |
1840 |
/* Lots missing */
|
1841 |
char pr_fname[16]; /* filename of executable */ |
1842 |
char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ |
1843 |
}; |
1844 |
|
1845 |
/* Here is the structure in which status of each thread is captured. */
|
1846 |
struct elf_thread_status {
|
1847 |
QTAILQ_ENTRY(elf_thread_status) ets_link; |
1848 |
struct target_elf_prstatus prstatus; /* NT_PRSTATUS */ |
1849 |
#if 0
|
1850 |
elf_fpregset_t fpu; /* NT_PRFPREG */
|
1851 |
struct task_struct *thread;
|
1852 |
elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
|
1853 |
#endif
|
1854 |
struct memelfnote notes[1]; |
1855 |
int num_notes;
|
1856 |
}; |
1857 |
|
1858 |
struct elf_note_info {
|
1859 |
struct memelfnote *notes;
|
1860 |
struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */ |
1861 |
struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */ |
1862 |
|
1863 |
QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list; |
1864 |
#if 0
|
1865 |
/*
|
1866 |
* Current version of ELF coredump doesn't support
|
1867 |
* dumping fp regs etc.
|
1868 |
*/
|
1869 |
elf_fpregset_t *fpu;
|
1870 |
elf_fpxregset_t *xfpu;
|
1871 |
int thread_status_size;
|
1872 |
#endif
|
1873 |
int notes_size;
|
1874 |
int numnote;
|
1875 |
}; |
1876 |
|
1877 |
struct vm_area_struct {
|
1878 |
abi_ulong vma_start; /* start vaddr of memory region */
|
1879 |
abi_ulong vma_end; /* end vaddr of memory region */
|
1880 |
abi_ulong vma_flags; /* protection etc. flags for the region */
|
1881 |
QTAILQ_ENTRY(vm_area_struct) vma_link; |
1882 |
}; |
1883 |
|
1884 |
struct mm_struct {
|
1885 |
QTAILQ_HEAD(, vm_area_struct) mm_mmap; |
1886 |
int mm_count; /* number of mappings */ |
1887 |
}; |
1888 |
|
1889 |
static struct mm_struct *vma_init(void); |
1890 |
static void vma_delete(struct mm_struct *); |
1891 |
static int vma_add_mapping(struct mm_struct *, abi_ulong, |
1892 |
abi_ulong, abi_ulong); |
1893 |
static int vma_get_mapping_count(const struct mm_struct *); |
1894 |
static struct vm_area_struct *vma_first(const struct mm_struct *); |
1895 |
static struct vm_area_struct *vma_next(struct vm_area_struct *); |
1896 |
static abi_ulong vma_dump_size(const struct vm_area_struct *); |
1897 |
static int vma_walker(void *priv, unsigned long start, unsigned long end, |
1898 |
unsigned long flags); |
1899 |
|
1900 |
static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t); |
1901 |
static void fill_note(struct memelfnote *, const char *, int, |
1902 |
unsigned int, void *); |
1903 |
static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int); |
1904 |
static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *); |
1905 |
static void fill_auxv_note(struct memelfnote *, const TaskState *); |
1906 |
static void fill_elf_note_phdr(struct elf_phdr *, int, off_t); |
1907 |
static size_t note_size(const struct memelfnote *); |
1908 |
static void free_note_info(struct elf_note_info *); |
1909 |
static int fill_note_info(struct elf_note_info *, long, const CPUState *); |
1910 |
static void fill_thread_info(struct elf_note_info *, const CPUState *); |
1911 |
static int core_dump_filename(const TaskState *, char *, size_t); |
1912 |
|
1913 |
static int dump_write(int, const void *, size_t); |
1914 |
static int write_note(struct memelfnote *, int); |
1915 |
static int write_note_info(struct elf_note_info *, int); |
1916 |
|
1917 |
#ifdef BSWAP_NEEDED
|
1918 |
static void bswap_prstatus(struct target_elf_prstatus *); |
1919 |
static void bswap_psinfo(struct target_elf_prpsinfo *); |
1920 |
|
1921 |
static void bswap_prstatus(struct target_elf_prstatus *prstatus) |
1922 |
{ |
1923 |
prstatus->pr_info.si_signo = tswapl(prstatus->pr_info.si_signo); |
1924 |
prstatus->pr_info.si_code = tswapl(prstatus->pr_info.si_code); |
1925 |
prstatus->pr_info.si_errno = tswapl(prstatus->pr_info.si_errno); |
1926 |
prstatus->pr_cursig = tswap16(prstatus->pr_cursig); |
1927 |
prstatus->pr_sigpend = tswapl(prstatus->pr_sigpend); |
1928 |
prstatus->pr_sighold = tswapl(prstatus->pr_sighold); |
1929 |
prstatus->pr_pid = tswap32(prstatus->pr_pid); |
1930 |
prstatus->pr_ppid = tswap32(prstatus->pr_ppid); |
1931 |
prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp); |
1932 |
prstatus->pr_sid = tswap32(prstatus->pr_sid); |
1933 |
/* cpu times are not filled, so we skip them */
|
1934 |
/* regs should be in correct format already */
|
1935 |
prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid); |
1936 |
} |
1937 |
|
1938 |
static void bswap_psinfo(struct target_elf_prpsinfo *psinfo) |
1939 |
{ |
1940 |
psinfo->pr_flag = tswapl(psinfo->pr_flag); |
1941 |
psinfo->pr_uid = tswap16(psinfo->pr_uid); |
1942 |
psinfo->pr_gid = tswap16(psinfo->pr_gid); |
1943 |
psinfo->pr_pid = tswap32(psinfo->pr_pid); |
1944 |
psinfo->pr_ppid = tswap32(psinfo->pr_ppid); |
1945 |
psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp); |
1946 |
psinfo->pr_sid = tswap32(psinfo->pr_sid); |
1947 |
} |
1948 |
#endif /* BSWAP_NEEDED */ |
1949 |
|
1950 |
/*
|
1951 |
* Minimal support for linux memory regions. These are needed
|
1952 |
* when we are finding out what memory exactly belongs to
|
1953 |
* emulated process. No locks needed here, as long as
|
1954 |
* thread that received the signal is stopped.
|
1955 |
*/
|
1956 |
|
1957 |
static struct mm_struct *vma_init(void) |
1958 |
{ |
1959 |
struct mm_struct *mm;
|
1960 |
|
1961 |
if ((mm = qemu_malloc(sizeof (*mm))) == NULL) |
1962 |
return (NULL); |
1963 |
|
1964 |
mm->mm_count = 0;
|
1965 |
QTAILQ_INIT(&mm->mm_mmap); |
1966 |
|
1967 |
return (mm);
|
1968 |
} |
1969 |
|
1970 |
static void vma_delete(struct mm_struct *mm) |
1971 |
{ |
1972 |
struct vm_area_struct *vma;
|
1973 |
|
1974 |
while ((vma = vma_first(mm)) != NULL) { |
1975 |
QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link); |
1976 |
qemu_free(vma); |
1977 |
} |
1978 |
qemu_free(mm); |
1979 |
} |
1980 |
|
1981 |
static int vma_add_mapping(struct mm_struct *mm, abi_ulong start, |
1982 |
abi_ulong end, abi_ulong flags) |
1983 |
{ |
1984 |
struct vm_area_struct *vma;
|
1985 |
|
1986 |
if ((vma = qemu_mallocz(sizeof (*vma))) == NULL) |
1987 |
return (-1); |
1988 |
|
1989 |
vma->vma_start = start; |
1990 |
vma->vma_end = end; |
1991 |
vma->vma_flags = flags; |
1992 |
|
1993 |
QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link); |
1994 |
mm->mm_count++; |
1995 |
|
1996 |
return (0); |
1997 |
} |
1998 |
|
1999 |
static struct vm_area_struct *vma_first(const struct mm_struct *mm) |
2000 |
{ |
2001 |
return (QTAILQ_FIRST(&mm->mm_mmap));
|
2002 |
} |
2003 |
|
2004 |
static struct vm_area_struct *vma_next(struct vm_area_struct *vma) |
2005 |
{ |
2006 |
return (QTAILQ_NEXT(vma, vma_link));
|
2007 |
} |
2008 |
|
2009 |
static int vma_get_mapping_count(const struct mm_struct *mm) |
2010 |
{ |
2011 |
return (mm->mm_count);
|
2012 |
} |
2013 |
|
2014 |
/*
|
2015 |
* Calculate file (dump) size of given memory region.
|
2016 |
*/
|
2017 |
static abi_ulong vma_dump_size(const struct vm_area_struct *vma) |
2018 |
{ |
2019 |
/* if we cannot even read the first page, skip it */
|
2020 |
if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
|
2021 |
return (0); |
2022 |
|
2023 |
/*
|
2024 |
* Usually we don't dump executable pages as they contain
|
2025 |
* non-writable code that debugger can read directly from
|
2026 |
* target library etc. However, thread stacks are marked
|
2027 |
* also executable so we read in first page of given region
|
2028 |
* and check whether it contains elf header. If there is
|
2029 |
* no elf header, we dump it.
|
2030 |
*/
|
2031 |
if (vma->vma_flags & PROT_EXEC) {
|
2032 |
char page[TARGET_PAGE_SIZE];
|
2033 |
|
2034 |
copy_from_user(page, vma->vma_start, sizeof (page));
|
2035 |
if ((page[EI_MAG0] == ELFMAG0) &&
|
2036 |
(page[EI_MAG1] == ELFMAG1) && |
2037 |
(page[EI_MAG2] == ELFMAG2) && |
2038 |
(page[EI_MAG3] == ELFMAG3)) { |
2039 |
/*
|
2040 |
* Mappings are possibly from ELF binary. Don't dump
|
2041 |
* them.
|
2042 |
*/
|
2043 |
return (0); |
2044 |
} |
2045 |
} |
2046 |
|
2047 |
return (vma->vma_end - vma->vma_start);
|
2048 |
} |
2049 |
|
2050 |
static int vma_walker(void *priv, unsigned long start, unsigned long end, |
2051 |
unsigned long flags) |
2052 |
{ |
2053 |
struct mm_struct *mm = (struct mm_struct *)priv; |
2054 |
|
2055 |
/*
|
2056 |
* Don't dump anything that qemu has reserved for internal use.
|
2057 |
*/
|
2058 |
if (flags & PAGE_RESERVED)
|
2059 |
return (0); |
2060 |
|
2061 |
vma_add_mapping(mm, start, end, flags); |
2062 |
return (0); |
2063 |
} |
2064 |
|
2065 |
static void fill_note(struct memelfnote *note, const char *name, int type, |
2066 |
unsigned int sz, void *data) |
2067 |
{ |
2068 |
unsigned int namesz; |
2069 |
|
2070 |
namesz = strlen(name) + 1;
|
2071 |
note->name = name; |
2072 |
note->namesz = namesz; |
2073 |
note->namesz_rounded = roundup(namesz, sizeof (int32_t));
|
2074 |
note->type = type; |
2075 |
note->datasz = roundup(sz, sizeof (int32_t));;
|
2076 |
note->data = data; |
2077 |
|
2078 |
/*
|
2079 |
* We calculate rounded up note size here as specified by
|
2080 |
* ELF document.
|
2081 |
*/
|
2082 |
note->notesz = sizeof (struct elf_note) + |
2083 |
note->namesz_rounded + note->datasz; |
2084 |
} |
2085 |
|
2086 |
static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine, |
2087 |
uint32_t flags) |
2088 |
{ |
2089 |
(void) memset(elf, 0, sizeof(*elf)); |
2090 |
|
2091 |
(void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
|
2092 |
elf->e_ident[EI_CLASS] = ELF_CLASS; |
2093 |
elf->e_ident[EI_DATA] = ELF_DATA; |
2094 |
elf->e_ident[EI_VERSION] = EV_CURRENT; |
2095 |
elf->e_ident[EI_OSABI] = ELF_OSABI; |
2096 |
|
2097 |
elf->e_type = ET_CORE; |
2098 |
elf->e_machine = machine; |
2099 |
elf->e_version = EV_CURRENT; |
2100 |
elf->e_phoff = sizeof(struct elfhdr); |
2101 |
elf->e_flags = flags; |
2102 |
elf->e_ehsize = sizeof(struct elfhdr); |
2103 |
elf->e_phentsize = sizeof(struct elf_phdr); |
2104 |
elf->e_phnum = segs; |
2105 |
|
2106 |
#ifdef BSWAP_NEEDED
|
2107 |
bswap_ehdr(elf); |
2108 |
#endif
|
2109 |
} |
2110 |
|
2111 |
static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset) |
2112 |
{ |
2113 |
phdr->p_type = PT_NOTE; |
2114 |
phdr->p_offset = offset; |
2115 |
phdr->p_vaddr = 0;
|
2116 |
phdr->p_paddr = 0;
|
2117 |
phdr->p_filesz = sz; |
2118 |
phdr->p_memsz = 0;
|
2119 |
phdr->p_flags = 0;
|
2120 |
phdr->p_align = 0;
|
2121 |
|
2122 |
#ifdef BSWAP_NEEDED
|
2123 |
bswap_phdr(phdr); |
2124 |
#endif
|
2125 |
} |
2126 |
|
2127 |
static size_t note_size(const struct memelfnote *note) |
2128 |
{ |
2129 |
return (note->notesz);
|
2130 |
} |
2131 |
|
2132 |
static void fill_prstatus(struct target_elf_prstatus *prstatus, |
2133 |
const TaskState *ts, int signr) |
2134 |
{ |
2135 |
(void) memset(prstatus, 0, sizeof (*prstatus)); |
2136 |
prstatus->pr_info.si_signo = prstatus->pr_cursig = signr; |
2137 |
prstatus->pr_pid = ts->ts_tid; |
2138 |
prstatus->pr_ppid = getppid(); |
2139 |
prstatus->pr_pgrp = getpgrp(); |
2140 |
prstatus->pr_sid = getsid(0);
|
2141 |
|
2142 |
#ifdef BSWAP_NEEDED
|
2143 |
bswap_prstatus(prstatus); |
2144 |
#endif
|
2145 |
} |
2146 |
|
2147 |
static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts) |
2148 |
{ |
2149 |
char *filename, *base_filename;
|
2150 |
unsigned int i, len; |
2151 |
|
2152 |
(void) memset(psinfo, 0, sizeof (*psinfo)); |
2153 |
|
2154 |
len = ts->info->arg_end - ts->info->arg_start; |
2155 |
if (len >= ELF_PRARGSZ)
|
2156 |
len = ELF_PRARGSZ - 1;
|
2157 |
if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
|
2158 |
return -EFAULT;
|
2159 |
for (i = 0; i < len; i++) |
2160 |
if (psinfo->pr_psargs[i] == 0) |
2161 |
psinfo->pr_psargs[i] = ' ';
|
2162 |
psinfo->pr_psargs[len] = 0;
|
2163 |
|
2164 |
psinfo->pr_pid = getpid(); |
2165 |
psinfo->pr_ppid = getppid(); |
2166 |
psinfo->pr_pgrp = getpgrp(); |
2167 |
psinfo->pr_sid = getsid(0);
|
2168 |
psinfo->pr_uid = getuid(); |
2169 |
psinfo->pr_gid = getgid(); |
2170 |
|
2171 |
filename = strdup(ts->bprm->filename); |
2172 |
base_filename = strdup(basename(filename)); |
2173 |
(void) strncpy(psinfo->pr_fname, base_filename,
|
2174 |
sizeof(psinfo->pr_fname));
|
2175 |
free(base_filename); |
2176 |
free(filename); |
2177 |
|
2178 |
#ifdef BSWAP_NEEDED
|
2179 |
bswap_psinfo(psinfo); |
2180 |
#endif
|
2181 |
return (0); |
2182 |
} |
2183 |
|
2184 |
static void fill_auxv_note(struct memelfnote *note, const TaskState *ts) |
2185 |
{ |
2186 |
elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv; |
2187 |
elf_addr_t orig_auxv = auxv; |
2188 |
abi_ulong val; |
2189 |
void *ptr;
|
2190 |
int i, len;
|
2191 |
|
2192 |
/*
|
2193 |
* Auxiliary vector is stored in target process stack. It contains
|
2194 |
* {type, value} pairs that we need to dump into note. This is not
|
2195 |
* strictly necessary but we do it here for sake of completeness.
|
2196 |
*/
|
2197 |
|
2198 |
/* find out lenght of the vector, AT_NULL is terminator */
|
2199 |
i = len = 0;
|
2200 |
do {
|
2201 |
get_user_ual(val, auxv); |
2202 |
i += 2;
|
2203 |
auxv += 2 * sizeof (elf_addr_t); |
2204 |
} while (val != AT_NULL);
|
2205 |
len = i * sizeof (elf_addr_t);
|
2206 |
|
2207 |
/* read in whole auxv vector and copy it to memelfnote */
|
2208 |
ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
|
2209 |
if (ptr != NULL) { |
2210 |
fill_note(note, "CORE", NT_AUXV, len, ptr);
|
2211 |
unlock_user(ptr, auxv, len); |
2212 |
} |
2213 |
} |
2214 |
|
2215 |
/*
|
2216 |
* Constructs name of coredump file. We have following convention
|
2217 |
* for the name:
|
2218 |
* qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
|
2219 |
*
|
2220 |
* Returns 0 in case of success, -1 otherwise (errno is set).
|
2221 |
*/
|
2222 |
static int core_dump_filename(const TaskState *ts, char *buf, |
2223 |
size_t bufsize) |
2224 |
{ |
2225 |
char timestamp[64]; |
2226 |
char *filename = NULL; |
2227 |
char *base_filename = NULL; |
2228 |
struct timeval tv;
|
2229 |
struct tm tm;
|
2230 |
|
2231 |
assert(bufsize >= PATH_MAX); |
2232 |
|
2233 |
if (gettimeofday(&tv, NULL) < 0) { |
2234 |
(void) fprintf(stderr, "unable to get current timestamp: %s", |
2235 |
strerror(errno)); |
2236 |
return (-1); |
2237 |
} |
2238 |
|
2239 |
filename = strdup(ts->bprm->filename); |
2240 |
base_filename = strdup(basename(filename)); |
2241 |
(void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S", |
2242 |
localtime_r(&tv.tv_sec, &tm)); |
2243 |
(void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core", |
2244 |
base_filename, timestamp, (int)getpid());
|
2245 |
free(base_filename); |
2246 |
free(filename); |
2247 |
|
2248 |
return (0); |
2249 |
} |
2250 |
|
2251 |
static int dump_write(int fd, const void *ptr, size_t size) |
2252 |
{ |
2253 |
const char *bufp = (const char *)ptr; |
2254 |
ssize_t bytes_written, bytes_left; |
2255 |
struct rlimit dumpsize;
|
2256 |
off_t pos; |
2257 |
|
2258 |
bytes_written = 0;
|
2259 |
getrlimit(RLIMIT_CORE, &dumpsize); |
2260 |
if ((pos = lseek(fd, 0, SEEK_CUR))==-1) { |
2261 |
if (errno == ESPIPE) { /* not a seekable stream */ |
2262 |
bytes_left = size; |
2263 |
} else {
|
2264 |
return pos;
|
2265 |
} |
2266 |
} else {
|
2267 |
if (dumpsize.rlim_cur <= pos) {
|
2268 |
return -1; |
2269 |
} else if (dumpsize.rlim_cur == RLIM_INFINITY) { |
2270 |
bytes_left = size; |
2271 |
} else {
|
2272 |
size_t limit_left=dumpsize.rlim_cur - pos; |
2273 |
bytes_left = limit_left >= size ? size : limit_left ; |
2274 |
} |
2275 |
} |
2276 |
|
2277 |
/*
|
2278 |
* In normal conditions, single write(2) should do but
|
2279 |
* in case of socket etc. this mechanism is more portable.
|
2280 |
*/
|
2281 |
do {
|
2282 |
bytes_written = write(fd, bufp, bytes_left); |
2283 |
if (bytes_written < 0) { |
2284 |
if (errno == EINTR)
|
2285 |
continue;
|
2286 |
return (-1); |
2287 |
} else if (bytes_written == 0) { /* eof */ |
2288 |
return (-1); |
2289 |
} |
2290 |
bufp += bytes_written; |
2291 |
bytes_left -= bytes_written; |
2292 |
} while (bytes_left > 0); |
2293 |
|
2294 |
return (0); |
2295 |
} |
2296 |
|
2297 |
static int write_note(struct memelfnote *men, int fd) |
2298 |
{ |
2299 |
struct elf_note en;
|
2300 |
|
2301 |
en.n_namesz = men->namesz; |
2302 |
en.n_type = men->type; |
2303 |
en.n_descsz = men->datasz; |
2304 |
|
2305 |
#ifdef BSWAP_NEEDED
|
2306 |
bswap_note(&en); |
2307 |
#endif
|
2308 |
|
2309 |
if (dump_write(fd, &en, sizeof(en)) != 0) |
2310 |
return (-1); |
2311 |
if (dump_write(fd, men->name, men->namesz_rounded) != 0) |
2312 |
return (-1); |
2313 |
if (dump_write(fd, men->data, men->datasz) != 0) |
2314 |
return (-1); |
2315 |
|
2316 |
return (0); |
2317 |
} |
2318 |
|
2319 |
static void fill_thread_info(struct elf_note_info *info, const CPUState *env) |
2320 |
{ |
2321 |
TaskState *ts = (TaskState *)env->opaque; |
2322 |
struct elf_thread_status *ets;
|
2323 |
|
2324 |
ets = qemu_mallocz(sizeof (*ets));
|
2325 |
ets->num_notes = 1; /* only prstatus is dumped */ |
2326 |
fill_prstatus(&ets->prstatus, ts, 0);
|
2327 |
elf_core_copy_regs(&ets->prstatus.pr_reg, env); |
2328 |
fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus), |
2329 |
&ets->prstatus); |
2330 |
|
2331 |
QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link); |
2332 |
|
2333 |
info->notes_size += note_size(&ets->notes[0]);
|
2334 |
} |
2335 |
|
2336 |
static int fill_note_info(struct elf_note_info *info, |
2337 |
long signr, const CPUState *env) |
2338 |
{ |
2339 |
#define NUMNOTES 3 |
2340 |
CPUState *cpu = NULL;
|
2341 |
TaskState *ts = (TaskState *)env->opaque; |
2342 |
int i;
|
2343 |
|
2344 |
(void) memset(info, 0, sizeof (*info)); |
2345 |
|
2346 |
QTAILQ_INIT(&info->thread_list); |
2347 |
|
2348 |
info->notes = qemu_mallocz(NUMNOTES * sizeof (struct memelfnote)); |
2349 |
if (info->notes == NULL) |
2350 |
return (-ENOMEM);
|
2351 |
info->prstatus = qemu_mallocz(sizeof (*info->prstatus));
|
2352 |
if (info->prstatus == NULL) |
2353 |
return (-ENOMEM);
|
2354 |
info->psinfo = qemu_mallocz(sizeof (*info->psinfo));
|
2355 |
if (info->prstatus == NULL) |
2356 |
return (-ENOMEM);
|
2357 |
|
2358 |
/*
|
2359 |
* First fill in status (and registers) of current thread
|
2360 |
* including process info & aux vector.
|
2361 |
*/
|
2362 |
fill_prstatus(info->prstatus, ts, signr); |
2363 |
elf_core_copy_regs(&info->prstatus->pr_reg, env); |
2364 |
fill_note(&info->notes[0], "CORE", NT_PRSTATUS, |
2365 |
sizeof (*info->prstatus), info->prstatus);
|
2366 |
fill_psinfo(info->psinfo, ts); |
2367 |
fill_note(&info->notes[1], "CORE", NT_PRPSINFO, |
2368 |
sizeof (*info->psinfo), info->psinfo);
|
2369 |
fill_auxv_note(&info->notes[2], ts);
|
2370 |
info->numnote = 3;
|
2371 |
|
2372 |
info->notes_size = 0;
|
2373 |
for (i = 0; i < info->numnote; i++) |
2374 |
info->notes_size += note_size(&info->notes[i]); |
2375 |
|
2376 |
/* read and fill status of all threads */
|
2377 |
cpu_list_lock(); |
2378 |
for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) { |
2379 |
if (cpu == thread_env)
|
2380 |
continue;
|
2381 |
fill_thread_info(info, cpu); |
2382 |
} |
2383 |
cpu_list_unlock(); |
2384 |
|
2385 |
return (0); |
2386 |
} |
2387 |
|
2388 |
static void free_note_info(struct elf_note_info *info) |
2389 |
{ |
2390 |
struct elf_thread_status *ets;
|
2391 |
|
2392 |
while (!QTAILQ_EMPTY(&info->thread_list)) {
|
2393 |
ets = QTAILQ_FIRST(&info->thread_list); |
2394 |
QTAILQ_REMOVE(&info->thread_list, ets, ets_link); |
2395 |
qemu_free(ets); |
2396 |
} |
2397 |
|
2398 |
qemu_free(info->prstatus); |
2399 |
qemu_free(info->psinfo); |
2400 |
qemu_free(info->notes); |
2401 |
} |
2402 |
|
2403 |
static int write_note_info(struct elf_note_info *info, int fd) |
2404 |
{ |
2405 |
struct elf_thread_status *ets;
|
2406 |
int i, error = 0; |
2407 |
|
2408 |
/* write prstatus, psinfo and auxv for current thread */
|
2409 |
for (i = 0; i < info->numnote; i++) |
2410 |
if ((error = write_note(&info->notes[i], fd)) != 0) |
2411 |
return (error);
|
2412 |
|
2413 |
/* write prstatus for each thread */
|
2414 |
for (ets = info->thread_list.tqh_first; ets != NULL; |
2415 |
ets = ets->ets_link.tqe_next) { |
2416 |
if ((error = write_note(&ets->notes[0], fd)) != 0) |
2417 |
return (error);
|
2418 |
} |
2419 |
|
2420 |
return (0); |
2421 |
} |
2422 |
|
2423 |
/*
|
2424 |
* Write out ELF coredump.
|
2425 |
*
|
2426 |
* See documentation of ELF object file format in:
|
2427 |
* http://www.caldera.com/developers/devspecs/gabi41.pdf
|
2428 |
*
|
2429 |
* Coredump format in linux is following:
|
2430 |
*
|
2431 |
* 0 +----------------------+ \
|
2432 |
* | ELF header | ET_CORE |
|
2433 |
* +----------------------+ |
|
2434 |
* | ELF program headers | |--- headers
|
2435 |
* | - NOTE section | |
|
2436 |
* | - PT_LOAD sections | |
|
2437 |
* +----------------------+ /
|
2438 |
* | NOTEs: |
|
2439 |
* | - NT_PRSTATUS |
|
2440 |
* | - NT_PRSINFO |
|
2441 |
* | - NT_AUXV |
|
2442 |
* +----------------------+ <-- aligned to target page
|
2443 |
* | Process memory dump |
|
2444 |
* : :
|
2445 |
* . .
|
2446 |
* : :
|
2447 |
* | |
|
2448 |
* +----------------------+
|
2449 |
*
|
2450 |
* NT_PRSTATUS -> struct elf_prstatus (per thread)
|
2451 |
* NT_PRSINFO -> struct elf_prpsinfo
|
2452 |
* NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
|
2453 |
*
|
2454 |
* Format follows System V format as close as possible. Current
|
2455 |
* version limitations are as follows:
|
2456 |
* - no floating point registers are dumped
|
2457 |
*
|
2458 |
* Function returns 0 in case of success, negative errno otherwise.
|
2459 |
*
|
2460 |
* TODO: make this work also during runtime: it should be
|
2461 |
* possible to force coredump from running process and then
|
2462 |
* continue processing. For example qemu could set up SIGUSR2
|
2463 |
* handler (provided that target process haven't registered
|
2464 |
* handler for that) that does the dump when signal is received.
|
2465 |
*/
|
2466 |
static int elf_core_dump(int signr, const CPUState *env) |
2467 |
{ |
2468 |
const TaskState *ts = (const TaskState *)env->opaque; |
2469 |
struct vm_area_struct *vma = NULL; |
2470 |
char corefile[PATH_MAX];
|
2471 |
struct elf_note_info info;
|
2472 |
struct elfhdr elf;
|
2473 |
struct elf_phdr phdr;
|
2474 |
struct rlimit dumpsize;
|
2475 |
struct mm_struct *mm = NULL; |
2476 |
off_t offset = 0, data_offset = 0; |
2477 |
int segs = 0; |
2478 |
int fd = -1; |
2479 |
|
2480 |
errno = 0;
|
2481 |
getrlimit(RLIMIT_CORE, &dumpsize); |
2482 |
if (dumpsize.rlim_cur == 0) |
2483 |
return 0; |
2484 |
|
2485 |
if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0) |
2486 |
return (-errno);
|
2487 |
|
2488 |
if ((fd = open(corefile, O_WRONLY | O_CREAT,
|
2489 |
S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
|
2490 |
return (-errno);
|
2491 |
|
2492 |
/*
|
2493 |
* Walk through target process memory mappings and
|
2494 |
* set up structure containing this information. After
|
2495 |
* this point vma_xxx functions can be used.
|
2496 |
*/
|
2497 |
if ((mm = vma_init()) == NULL) |
2498 |
goto out;
|
2499 |
|
2500 |
walk_memory_regions(mm, vma_walker); |
2501 |
segs = vma_get_mapping_count(mm); |
2502 |
|
2503 |
/*
|
2504 |
* Construct valid coredump ELF header. We also
|
2505 |
* add one more segment for notes.
|
2506 |
*/
|
2507 |
fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0); |
2508 |
if (dump_write(fd, &elf, sizeof (elf)) != 0) |
2509 |
goto out;
|
2510 |
|
2511 |
/* fill in in-memory version of notes */
|
2512 |
if (fill_note_info(&info, signr, env) < 0) |
2513 |
goto out;
|
2514 |
|
2515 |
offset += sizeof (elf); /* elf header */ |
2516 |
offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */ |
2517 |
|
2518 |
/* write out notes program header */
|
2519 |
fill_elf_note_phdr(&phdr, info.notes_size, offset); |
2520 |
|
2521 |
offset += info.notes_size; |
2522 |
if (dump_write(fd, &phdr, sizeof (phdr)) != 0) |
2523 |
goto out;
|
2524 |
|
2525 |
/*
|
2526 |
* ELF specification wants data to start at page boundary so
|
2527 |
* we align it here.
|
2528 |
*/
|
2529 |
offset = roundup(offset, ELF_EXEC_PAGESIZE); |
2530 |
|
2531 |
/*
|
2532 |
* Write program headers for memory regions mapped in
|
2533 |
* the target process.
|
2534 |
*/
|
2535 |
for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) { |
2536 |
(void) memset(&phdr, 0, sizeof (phdr)); |
2537 |
|
2538 |
phdr.p_type = PT_LOAD; |
2539 |
phdr.p_offset = offset; |
2540 |
phdr.p_vaddr = vma->vma_start; |
2541 |
phdr.p_paddr = 0;
|
2542 |
phdr.p_filesz = vma_dump_size(vma); |
2543 |
offset += phdr.p_filesz; |
2544 |
phdr.p_memsz = vma->vma_end - vma->vma_start; |
2545 |
phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
|
2546 |
if (vma->vma_flags & PROT_WRITE)
|
2547 |
phdr.p_flags |= PF_W; |
2548 |
if (vma->vma_flags & PROT_EXEC)
|
2549 |
phdr.p_flags |= PF_X; |
2550 |
phdr.p_align = ELF_EXEC_PAGESIZE; |
2551 |
|
2552 |
dump_write(fd, &phdr, sizeof (phdr));
|
2553 |
} |
2554 |
|
2555 |
/*
|
2556 |
* Next we write notes just after program headers. No
|
2557 |
* alignment needed here.
|
2558 |
*/
|
2559 |
if (write_note_info(&info, fd) < 0) |
2560 |
goto out;
|
2561 |
|
2562 |
/* align data to page boundary */
|
2563 |
data_offset = lseek(fd, 0, SEEK_CUR);
|
2564 |
data_offset = TARGET_PAGE_ALIGN(data_offset); |
2565 |
if (lseek(fd, data_offset, SEEK_SET) != data_offset)
|
2566 |
goto out;
|
2567 |
|
2568 |
/*
|
2569 |
* Finally we can dump process memory into corefile as well.
|
2570 |
*/
|
2571 |
for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) { |
2572 |
abi_ulong addr; |
2573 |
abi_ulong end; |
2574 |
|
2575 |
end = vma->vma_start + vma_dump_size(vma); |
2576 |
|
2577 |
for (addr = vma->vma_start; addr < end;
|
2578 |
addr += TARGET_PAGE_SIZE) { |
2579 |
char page[TARGET_PAGE_SIZE];
|
2580 |
int error;
|
2581 |
|
2582 |
/*
|
2583 |
* Read in page from target process memory and
|
2584 |
* write it to coredump file.
|
2585 |
*/
|
2586 |
error = copy_from_user(page, addr, sizeof (page));
|
2587 |
if (error != 0) { |
2588 |
(void) fprintf(stderr, "unable to dump " TARGET_FMT_lx "\n", |
2589 |
addr); |
2590 |
errno = -error; |
2591 |
goto out;
|
2592 |
} |
2593 |
if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0) |
2594 |
goto out;
|
2595 |
} |
2596 |
} |
2597 |
|
2598 |
out:
|
2599 |
free_note_info(&info); |
2600 |
if (mm != NULL) |
2601 |
vma_delete(mm); |
2602 |
(void) close(fd);
|
2603 |
|
2604 |
if (errno != 0) |
2605 |
return (-errno);
|
2606 |
return (0); |
2607 |
} |
2608 |
|
2609 |
#endif /* USE_ELF_CORE_DUMP */ |
2610 |
|
2611 |
static int load_aout_interp(void * exptr, int interp_fd) |
2612 |
{ |
2613 |
printf("a.out interpreter not yet supported\n");
|
2614 |
return(0); |
2615 |
} |
2616 |
|
2617 |
void do_init_thread(struct target_pt_regs *regs, struct image_info *infop) |
2618 |
{ |
2619 |
init_thread(regs, infop); |
2620 |
} |