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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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typedef target_ulong target_elf_greg_t;
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#ifdef USE_UID16
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typedef uint16_t target_uid_t;
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typedef uint16_t target_gid_t;
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#else
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typedef uint32_t target_uid_t;
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typedef uint32_t target_gid_t;
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#endif
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typedef int32_t target_pid_t;
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#ifdef TARGET_I386
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#define ELF_PLATFORM get_elf_platform()
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static const char *get_elf_platform(void) |
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{ |
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static char elf_platform[] = "i386"; |
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int family = (thread_env->cpuid_version >> 8) & 0xff; |
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if (family > 6) |
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family = 6;
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if (family >= 3) |
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elf_platform[1] = '0' + family; |
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return elf_platform;
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} |
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#define ELF_HWCAP get_elf_hwcap()
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static uint32_t get_elf_hwcap(void) |
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{ |
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return thread_env->cpuid_features;
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} |
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#ifdef TARGET_X86_64
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#define ELF_START_MMAP 0x2aaaaab000ULL |
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#define elf_check_arch(x) ( ((x) == ELF_ARCH) )
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#define ELF_CLASS ELFCLASS64
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#define ELF_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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#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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#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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#define ELF_NREG 18 |
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typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
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static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
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{ |
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(*regs)[0] = tswapl(env->regs[0]); |
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(*regs)[1] = tswapl(env->regs[1]); |
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(*regs)[2] = tswapl(env->regs[2]); |
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(*regs)[3] = tswapl(env->regs[3]); |
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(*regs)[4] = tswapl(env->regs[4]); |
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(*regs)[5] = tswapl(env->regs[5]); |
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(*regs)[6] = tswapl(env->regs[6]); |
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(*regs)[7] = tswapl(env->regs[7]); |
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(*regs)[8] = tswapl(env->regs[8]); |
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(*regs)[9] = tswapl(env->regs[9]); |
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(*regs)[10] = tswapl(env->regs[10]); |
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(*regs)[11] = tswapl(env->regs[11]); |
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(*regs)[12] = tswapl(env->regs[12]); |
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(*regs)[13] = tswapl(env->regs[13]); |
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(*regs)[14] = tswapl(env->regs[14]); |
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(*regs)[15] = tswapl(env->regs[15]); |
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(*regs)[16] = tswapl(cpsr_read((CPUState *)env));
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(*regs)[17] = tswapl(env->regs[0]); /* XXX */ |
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} |
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#define USE_ELF_CORE_DUMP
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#define ELF_EXEC_PAGESIZE 4096 |
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enum
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{ |
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ARM_HWCAP_ARM_SWP = 1 << 0, |
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ARM_HWCAP_ARM_HALF = 1 << 1, |
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ARM_HWCAP_ARM_THUMB = 1 << 2, |
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ARM_HWCAP_ARM_26BIT = 1 << 3, |
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ARM_HWCAP_ARM_FAST_MULT = 1 << 4, |
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ARM_HWCAP_ARM_FPA = 1 << 5, |
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ARM_HWCAP_ARM_VFP = 1 << 6, |
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ARM_HWCAP_ARM_EDSP = 1 << 7, |
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ARM_HWCAP_ARM_JAVA = 1 << 8, |
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ARM_HWCAP_ARM_IWMMXT = 1 << 9, |
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ARM_HWCAP_ARM_THUMBEE = 1 << 10, |
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ARM_HWCAP_ARM_NEON = 1 << 11, |
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ARM_HWCAP_ARM_VFPv3 = 1 << 12, |
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ARM_HWCAP_ARM_VFPv3D16 = 1 << 13, |
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}; |
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#define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \
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| ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \ |
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| ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP \ |
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| ARM_HWCAP_ARM_NEON | ARM_HWCAP_ARM_VFPv3 ) |
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#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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|
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#else
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#define ELF_START_MMAP 0x80000000 |
380 |
|
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#define elf_check_arch(x) ( (x) == EM_SPARC )
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|
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#define ELF_CLASS ELFCLASS32
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#define ELF_DATA ELFDATA2MSB
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#define ELF_ARCH EM_SPARC
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|
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static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
388 |
{ |
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regs->psr = 0;
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regs->pc = infop->entry; |
391 |
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; |
394 |
} |
395 |
|
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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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400 |
|
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#define ELF_START_MMAP 0x80000000 |
402 |
|
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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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|
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#define ELF_CLASS ELFCLASS64
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|
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#else
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|
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#define elf_check_arch(x) ( (x) == EM_PPC )
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|
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#define ELF_CLASS ELFCLASS32
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#endif
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|
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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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|
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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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445 |
QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
|
446 |
QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
|
447 |
QEMU_PPC_FEATURE_PA6T = 0x00000800,
|
448 |
QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
|
449 |
QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
|
450 |
QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
|
451 |
QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
|
452 |
QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
|
453 |
|
454 |
QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
|
455 |
QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
|
456 |
}; |
457 |
|
458 |
#define ELF_HWCAP get_elf_hwcap()
|
459 |
|
460 |
static uint32_t get_elf_hwcap(void) |
461 |
{ |
462 |
CPUState *e = thread_env; |
463 |
uint32_t features = 0;
|
464 |
|
465 |
/* We don't have to be terribly complete here; the high points are
|
466 |
Altivec/FP/SPE support. Anything else is just a bonus. */
|
467 |
#define GET_FEATURE(flag, feature) \
|
468 |
do {if (e->insns_flags & flag) features |= feature; } while(0) |
469 |
GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64); |
470 |
GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU); |
471 |
GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC); |
472 |
GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE); |
473 |
GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE); |
474 |
GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE); |
475 |
GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE); |
476 |
GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC); |
477 |
#undef GET_FEATURE
|
478 |
|
479 |
return features;
|
480 |
} |
481 |
|
482 |
/*
|
483 |
* We need to put in some extra aux table entries to tell glibc what
|
484 |
* the cache block size is, so it can use the dcbz instruction safely.
|
485 |
*/
|
486 |
#define AT_DCACHEBSIZE 19 |
487 |
#define AT_ICACHEBSIZE 20 |
488 |
#define AT_UCACHEBSIZE 21 |
489 |
/* A special ignored type value for PPC, for glibc compatibility. */
|
490 |
#define AT_IGNOREPPC 22 |
491 |
/*
|
492 |
* The requirements here are:
|
493 |
* - keep the final alignment of sp (sp & 0xf)
|
494 |
* - make sure the 32-bit value at the first 16 byte aligned position of
|
495 |
* AUXV is greater than 16 for glibc compatibility.
|
496 |
* AT_IGNOREPPC is used for that.
|
497 |
* - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
|
498 |
* even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
|
499 |
*/
|
500 |
#define DLINFO_ARCH_ITEMS 5 |
501 |
#define ARCH_DLINFO \
|
502 |
do { \
|
503 |
NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
|
504 |
NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
|
505 |
NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
|
506 |
/* \
|
507 |
* Now handle glibc compatibility. \
|
508 |
*/ \
|
509 |
NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
510 |
NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
511 |
} while (0) |
512 |
|
513 |
static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop) |
514 |
{ |
515 |
_regs->gpr[1] = infop->start_stack;
|
516 |
#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
|
517 |
_regs->gpr[2] = ldq_raw(infop->entry + 8) + infop->load_addr; |
518 |
infop->entry = ldq_raw(infop->entry) + infop->load_addr; |
519 |
#endif
|
520 |
_regs->nip = infop->entry; |
521 |
} |
522 |
|
523 |
/* See linux kernel: arch/powerpc/include/asm/elf.h. */
|
524 |
#define ELF_NREG 48 |
525 |
typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
526 |
|
527 |
static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
528 |
{ |
529 |
int i;
|
530 |
target_ulong ccr = 0;
|
531 |
|
532 |
for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { |
533 |
(*regs)[i] = tswapl(env->gpr[i]); |
534 |
} |
535 |
|
536 |
(*regs)[32] = tswapl(env->nip);
|
537 |
(*regs)[33] = tswapl(env->msr);
|
538 |
(*regs)[35] = tswapl(env->ctr);
|
539 |
(*regs)[36] = tswapl(env->lr);
|
540 |
(*regs)[37] = tswapl(env->xer);
|
541 |
|
542 |
for (i = 0; i < ARRAY_SIZE(env->crf); i++) { |
543 |
ccr |= env->crf[i] << (32 - ((i + 1) * 4)); |
544 |
} |
545 |
(*regs)[38] = tswapl(ccr);
|
546 |
} |
547 |
|
548 |
#define USE_ELF_CORE_DUMP
|
549 |
#define ELF_EXEC_PAGESIZE 4096 |
550 |
|
551 |
#endif
|
552 |
|
553 |
#ifdef TARGET_MIPS
|
554 |
|
555 |
#define ELF_START_MMAP 0x80000000 |
556 |
|
557 |
#define elf_check_arch(x) ( (x) == EM_MIPS )
|
558 |
|
559 |
#ifdef TARGET_MIPS64
|
560 |
#define ELF_CLASS ELFCLASS64
|
561 |
#else
|
562 |
#define ELF_CLASS ELFCLASS32
|
563 |
#endif
|
564 |
#ifdef TARGET_WORDS_BIGENDIAN
|
565 |
#define ELF_DATA ELFDATA2MSB
|
566 |
#else
|
567 |
#define ELF_DATA ELFDATA2LSB
|
568 |
#endif
|
569 |
#define ELF_ARCH EM_MIPS
|
570 |
|
571 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
572 |
{ |
573 |
regs->cp0_status = 2 << CP0St_KSU;
|
574 |
regs->cp0_epc = infop->entry; |
575 |
regs->regs[29] = infop->start_stack;
|
576 |
} |
577 |
|
578 |
/* See linux kernel: arch/mips/include/asm/elf.h. */
|
579 |
#define ELF_NREG 45 |
580 |
typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
581 |
|
582 |
/* See linux kernel: arch/mips/include/asm/reg.h. */
|
583 |
enum {
|
584 |
#ifdef TARGET_MIPS64
|
585 |
TARGET_EF_R0 = 0,
|
586 |
#else
|
587 |
TARGET_EF_R0 = 6,
|
588 |
#endif
|
589 |
TARGET_EF_R26 = TARGET_EF_R0 + 26,
|
590 |
TARGET_EF_R27 = TARGET_EF_R0 + 27,
|
591 |
TARGET_EF_LO = TARGET_EF_R0 + 32,
|
592 |
TARGET_EF_HI = TARGET_EF_R0 + 33,
|
593 |
TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
|
594 |
TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
|
595 |
TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
|
596 |
TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
|
597 |
}; |
598 |
|
599 |
/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
|
600 |
static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
601 |
{ |
602 |
int i;
|
603 |
|
604 |
for (i = 0; i < TARGET_EF_R0; i++) { |
605 |
(*regs)[i] = 0;
|
606 |
} |
607 |
(*regs)[TARGET_EF_R0] = 0;
|
608 |
|
609 |
for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) { |
610 |
(*regs)[TARGET_EF_R0 + i] = tswapl(env->active_tc.gpr[i]); |
611 |
} |
612 |
|
613 |
(*regs)[TARGET_EF_R26] = 0;
|
614 |
(*regs)[TARGET_EF_R27] = 0;
|
615 |
(*regs)[TARGET_EF_LO] = tswapl(env->active_tc.LO[0]);
|
616 |
(*regs)[TARGET_EF_HI] = tswapl(env->active_tc.HI[0]);
|
617 |
(*regs)[TARGET_EF_CP0_EPC] = tswapl(env->active_tc.PC); |
618 |
(*regs)[TARGET_EF_CP0_BADVADDR] = tswapl(env->CP0_BadVAddr); |
619 |
(*regs)[TARGET_EF_CP0_STATUS] = tswapl(env->CP0_Status); |
620 |
(*regs)[TARGET_EF_CP0_CAUSE] = tswapl(env->CP0_Cause); |
621 |
} |
622 |
|
623 |
#define USE_ELF_CORE_DUMP
|
624 |
#define ELF_EXEC_PAGESIZE 4096 |
625 |
|
626 |
#endif /* TARGET_MIPS */ |
627 |
|
628 |
#ifdef TARGET_MICROBLAZE
|
629 |
|
630 |
#define ELF_START_MMAP 0x80000000 |
631 |
|
632 |
#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
|
633 |
|
634 |
#define ELF_CLASS ELFCLASS32
|
635 |
#define ELF_DATA ELFDATA2MSB
|
636 |
#define ELF_ARCH EM_MICROBLAZE
|
637 |
|
638 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
639 |
{ |
640 |
regs->pc = infop->entry; |
641 |
regs->r1 = infop->start_stack; |
642 |
|
643 |
} |
644 |
|
645 |
#define ELF_EXEC_PAGESIZE 4096 |
646 |
|
647 |
#define USE_ELF_CORE_DUMP
|
648 |
#define ELF_NREG 38 |
649 |
typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
650 |
|
651 |
/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
|
652 |
static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
653 |
{ |
654 |
int i, pos = 0; |
655 |
|
656 |
for (i = 0; i < 32; i++) { |
657 |
(*regs)[pos++] = tswapl(env->regs[i]); |
658 |
} |
659 |
|
660 |
for (i = 0; i < 6; i++) { |
661 |
(*regs)[pos++] = tswapl(env->sregs[i]); |
662 |
} |
663 |
} |
664 |
|
665 |
#endif /* TARGET_MICROBLAZE */ |
666 |
|
667 |
#ifdef TARGET_SH4
|
668 |
|
669 |
#define ELF_START_MMAP 0x80000000 |
670 |
|
671 |
#define elf_check_arch(x) ( (x) == EM_SH )
|
672 |
|
673 |
#define ELF_CLASS ELFCLASS32
|
674 |
#define ELF_DATA ELFDATA2LSB
|
675 |
#define ELF_ARCH EM_SH
|
676 |
|
677 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
678 |
{ |
679 |
/* Check other registers XXXXX */
|
680 |
regs->pc = infop->entry; |
681 |
regs->regs[15] = infop->start_stack;
|
682 |
} |
683 |
|
684 |
/* See linux kernel: arch/sh/include/asm/elf.h. */
|
685 |
#define ELF_NREG 23 |
686 |
typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
687 |
|
688 |
/* See linux kernel: arch/sh/include/asm/ptrace.h. */
|
689 |
enum {
|
690 |
TARGET_REG_PC = 16,
|
691 |
TARGET_REG_PR = 17,
|
692 |
TARGET_REG_SR = 18,
|
693 |
TARGET_REG_GBR = 19,
|
694 |
TARGET_REG_MACH = 20,
|
695 |
TARGET_REG_MACL = 21,
|
696 |
TARGET_REG_SYSCALL = 22
|
697 |
}; |
698 |
|
699 |
static inline void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
700 |
{ |
701 |
int i;
|
702 |
|
703 |
for (i = 0; i < 16; i++) { |
704 |
(*regs[i]) = tswapl(env->gregs[i]); |
705 |
} |
706 |
|
707 |
(*regs)[TARGET_REG_PC] = tswapl(env->pc); |
708 |
(*regs)[TARGET_REG_PR] = tswapl(env->pr); |
709 |
(*regs)[TARGET_REG_SR] = tswapl(env->sr); |
710 |
(*regs)[TARGET_REG_GBR] = tswapl(env->gbr); |
711 |
(*regs)[TARGET_REG_MACH] = tswapl(env->mach); |
712 |
(*regs)[TARGET_REG_MACL] = tswapl(env->macl); |
713 |
(*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */ |
714 |
} |
715 |
|
716 |
#define USE_ELF_CORE_DUMP
|
717 |
#define ELF_EXEC_PAGESIZE 4096 |
718 |
|
719 |
#endif
|
720 |
|
721 |
#ifdef TARGET_CRIS
|
722 |
|
723 |
#define ELF_START_MMAP 0x80000000 |
724 |
|
725 |
#define elf_check_arch(x) ( (x) == EM_CRIS )
|
726 |
|
727 |
#define ELF_CLASS ELFCLASS32
|
728 |
#define ELF_DATA ELFDATA2LSB
|
729 |
#define ELF_ARCH EM_CRIS
|
730 |
|
731 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
732 |
{ |
733 |
regs->erp = infop->entry; |
734 |
} |
735 |
|
736 |
#define ELF_EXEC_PAGESIZE 8192 |
737 |
|
738 |
#endif
|
739 |
|
740 |
#ifdef TARGET_M68K
|
741 |
|
742 |
#define ELF_START_MMAP 0x80000000 |
743 |
|
744 |
#define elf_check_arch(x) ( (x) == EM_68K )
|
745 |
|
746 |
#define ELF_CLASS ELFCLASS32
|
747 |
#define ELF_DATA ELFDATA2MSB
|
748 |
#define ELF_ARCH EM_68K
|
749 |
|
750 |
/* ??? Does this need to do anything?
|
751 |
#define ELF_PLAT_INIT(_r) */
|
752 |
|
753 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
754 |
{ |
755 |
regs->usp = infop->start_stack; |
756 |
regs->sr = 0;
|
757 |
regs->pc = infop->entry; |
758 |
} |
759 |
|
760 |
/* See linux kernel: arch/m68k/include/asm/elf.h. */
|
761 |
#define ELF_NREG 20 |
762 |
typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
763 |
|
764 |
static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env) |
765 |
{ |
766 |
(*regs)[0] = tswapl(env->dregs[1]); |
767 |
(*regs)[1] = tswapl(env->dregs[2]); |
768 |
(*regs)[2] = tswapl(env->dregs[3]); |
769 |
(*regs)[3] = tswapl(env->dregs[4]); |
770 |
(*regs)[4] = tswapl(env->dregs[5]); |
771 |
(*regs)[5] = tswapl(env->dregs[6]); |
772 |
(*regs)[6] = tswapl(env->dregs[7]); |
773 |
(*regs)[7] = tswapl(env->aregs[0]); |
774 |
(*regs)[8] = tswapl(env->aregs[1]); |
775 |
(*regs)[9] = tswapl(env->aregs[2]); |
776 |
(*regs)[10] = tswapl(env->aregs[3]); |
777 |
(*regs)[11] = tswapl(env->aregs[4]); |
778 |
(*regs)[12] = tswapl(env->aregs[5]); |
779 |
(*regs)[13] = tswapl(env->aregs[6]); |
780 |
(*regs)[14] = tswapl(env->dregs[0]); |
781 |
(*regs)[15] = tswapl(env->aregs[7]); |
782 |
(*regs)[16] = tswapl(env->dregs[0]); /* FIXME: orig_d0 */ |
783 |
(*regs)[17] = tswapl(env->sr);
|
784 |
(*regs)[18] = tswapl(env->pc);
|
785 |
(*regs)[19] = 0; /* FIXME: regs->format | regs->vector */ |
786 |
} |
787 |
|
788 |
#define USE_ELF_CORE_DUMP
|
789 |
#define ELF_EXEC_PAGESIZE 8192 |
790 |
|
791 |
#endif
|
792 |
|
793 |
#ifdef TARGET_ALPHA
|
794 |
|
795 |
#define ELF_START_MMAP (0x30000000000ULL) |
796 |
|
797 |
#define elf_check_arch(x) ( (x) == ELF_ARCH )
|
798 |
|
799 |
#define ELF_CLASS ELFCLASS64
|
800 |
#define ELF_DATA ELFDATA2MSB
|
801 |
#define ELF_ARCH EM_ALPHA
|
802 |
|
803 |
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
804 |
{ |
805 |
regs->pc = infop->entry; |
806 |
regs->ps = 8;
|
807 |
regs->usp = infop->start_stack; |
808 |
} |
809 |
|
810 |
#define ELF_EXEC_PAGESIZE 8192 |
811 |
|
812 |
#endif /* TARGET_ALPHA */ |
813 |
|
814 |
#ifndef ELF_PLATFORM
|
815 |
#define ELF_PLATFORM (NULL) |
816 |
#endif
|
817 |
|
818 |
#ifndef ELF_HWCAP
|
819 |
#define ELF_HWCAP 0 |
820 |
#endif
|
821 |
|
822 |
#ifdef TARGET_ABI32
|
823 |
#undef ELF_CLASS
|
824 |
#define ELF_CLASS ELFCLASS32
|
825 |
#undef bswaptls
|
826 |
#define bswaptls(ptr) bswap32s(ptr)
|
827 |
#endif
|
828 |
|
829 |
#include "elf.h" |
830 |
|
831 |
struct exec
|
832 |
{ |
833 |
unsigned int a_info; /* Use macros N_MAGIC, etc for access */ |
834 |
unsigned int a_text; /* length of text, in bytes */ |
835 |
unsigned int a_data; /* length of data, in bytes */ |
836 |
unsigned int a_bss; /* length of uninitialized data area, in bytes */ |
837 |
unsigned int a_syms; /* length of symbol table data in file, in bytes */ |
838 |
unsigned int a_entry; /* start address */ |
839 |
unsigned int a_trsize; /* length of relocation info for text, in bytes */ |
840 |
unsigned int a_drsize; /* length of relocation info for data, in bytes */ |
841 |
}; |
842 |
|
843 |
|
844 |
#define N_MAGIC(exec) ((exec).a_info & 0xffff) |
845 |
#define OMAGIC 0407 |
846 |
#define NMAGIC 0410 |
847 |
#define ZMAGIC 0413 |
848 |
#define QMAGIC 0314 |
849 |
|
850 |
/* max code+data+bss space allocated to elf interpreter */
|
851 |
#define INTERP_MAP_SIZE (32 * 1024 * 1024) |
852 |
|
853 |
/* max code+data+bss+brk space allocated to ET_DYN executables */
|
854 |
#define ET_DYN_MAP_SIZE (128 * 1024 * 1024) |
855 |
|
856 |
/* Necessary parameters */
|
857 |
#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
|
858 |
#define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1)) |
859 |
#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1)) |
860 |
|
861 |
#define INTERPRETER_NONE 0 |
862 |
#define INTERPRETER_AOUT 1 |
863 |
#define INTERPRETER_ELF 2 |
864 |
|
865 |
#define DLINFO_ITEMS 12 |
866 |
|
867 |
static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) |
868 |
{ |
869 |
memcpy(to, from, n); |
870 |
} |
871 |
|
872 |
static int load_aout_interp(void * exptr, int interp_fd); |
873 |
|
874 |
#ifdef BSWAP_NEEDED
|
875 |
static void bswap_ehdr(struct elfhdr *ehdr) |
876 |
{ |
877 |
bswap16s(&ehdr->e_type); /* Object file type */
|
878 |
bswap16s(&ehdr->e_machine); /* Architecture */
|
879 |
bswap32s(&ehdr->e_version); /* Object file version */
|
880 |
bswaptls(&ehdr->e_entry); /* Entry point virtual address */
|
881 |
bswaptls(&ehdr->e_phoff); /* Program header table file offset */
|
882 |
bswaptls(&ehdr->e_shoff); /* Section header table file offset */
|
883 |
bswap32s(&ehdr->e_flags); /* Processor-specific flags */
|
884 |
bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
|
885 |
bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
|
886 |
bswap16s(&ehdr->e_phnum); /* Program header table entry count */
|
887 |
bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
|
888 |
bswap16s(&ehdr->e_shnum); /* Section header table entry count */
|
889 |
bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
|
890 |
} |
891 |
|
892 |
static void bswap_phdr(struct elf_phdr *phdr) |
893 |
{ |
894 |
bswap32s(&phdr->p_type); /* Segment type */
|
895 |
bswaptls(&phdr->p_offset); /* Segment file offset */
|
896 |
bswaptls(&phdr->p_vaddr); /* Segment virtual address */
|
897 |
bswaptls(&phdr->p_paddr); /* Segment physical address */
|
898 |
bswaptls(&phdr->p_filesz); /* Segment size in file */
|
899 |
bswaptls(&phdr->p_memsz); /* Segment size in memory */
|
900 |
bswap32s(&phdr->p_flags); /* Segment flags */
|
901 |
bswaptls(&phdr->p_align); /* Segment alignment */
|
902 |
} |
903 |
|
904 |
static void bswap_shdr(struct elf_shdr *shdr) |
905 |
{ |
906 |
bswap32s(&shdr->sh_name); |
907 |
bswap32s(&shdr->sh_type); |
908 |
bswaptls(&shdr->sh_flags); |
909 |
bswaptls(&shdr->sh_addr); |
910 |
bswaptls(&shdr->sh_offset); |
911 |
bswaptls(&shdr->sh_size); |
912 |
bswap32s(&shdr->sh_link); |
913 |
bswap32s(&shdr->sh_info); |
914 |
bswaptls(&shdr->sh_addralign); |
915 |
bswaptls(&shdr->sh_entsize); |
916 |
} |
917 |
|
918 |
static void bswap_sym(struct elf_sym *sym) |
919 |
{ |
920 |
bswap32s(&sym->st_name); |
921 |
bswaptls(&sym->st_value); |
922 |
bswaptls(&sym->st_size); |
923 |
bswap16s(&sym->st_shndx); |
924 |
} |
925 |
#endif
|
926 |
|
927 |
#ifdef USE_ELF_CORE_DUMP
|
928 |
static int elf_core_dump(int, const CPUState *); |
929 |
|
930 |
#ifdef BSWAP_NEEDED
|
931 |
static void bswap_note(struct elf_note *en) |
932 |
{ |
933 |
bswap32s(&en->n_namesz); |
934 |
bswap32s(&en->n_descsz); |
935 |
bswap32s(&en->n_type); |
936 |
} |
937 |
#endif /* BSWAP_NEEDED */ |
938 |
|
939 |
#endif /* USE_ELF_CORE_DUMP */ |
940 |
|
941 |
/*
|
942 |
* 'copy_elf_strings()' copies argument/envelope strings from user
|
943 |
* memory to free pages in kernel mem. These are in a format ready
|
944 |
* to be put directly into the top of new user memory.
|
945 |
*
|
946 |
*/
|
947 |
static abi_ulong copy_elf_strings(int argc,char ** argv, void **page, |
948 |
abi_ulong p) |
949 |
{ |
950 |
char *tmp, *tmp1, *pag = NULL; |
951 |
int len, offset = 0; |
952 |
|
953 |
if (!p) {
|
954 |
return 0; /* bullet-proofing */ |
955 |
} |
956 |
while (argc-- > 0) { |
957 |
tmp = argv[argc]; |
958 |
if (!tmp) {
|
959 |
fprintf(stderr, "VFS: argc is wrong");
|
960 |
exit(-1);
|
961 |
} |
962 |
tmp1 = tmp; |
963 |
while (*tmp++);
|
964 |
len = tmp - tmp1; |
965 |
if (p < len) { /* this shouldn't happen - 128kB */ |
966 |
return 0; |
967 |
} |
968 |
while (len) {
|
969 |
--p; --tmp; --len; |
970 |
if (--offset < 0) { |
971 |
offset = p % TARGET_PAGE_SIZE; |
972 |
pag = (char *)page[p/TARGET_PAGE_SIZE];
|
973 |
if (!pag) {
|
974 |
pag = (char *)malloc(TARGET_PAGE_SIZE);
|
975 |
memset(pag, 0, TARGET_PAGE_SIZE);
|
976 |
page[p/TARGET_PAGE_SIZE] = pag; |
977 |
if (!pag)
|
978 |
return 0; |
979 |
} |
980 |
} |
981 |
if (len == 0 || offset == 0) { |
982 |
*(pag + offset) = *tmp; |
983 |
} |
984 |
else {
|
985 |
int bytes_to_copy = (len > offset) ? offset : len;
|
986 |
tmp -= bytes_to_copy; |
987 |
p -= bytes_to_copy; |
988 |
offset -= bytes_to_copy; |
989 |
len -= bytes_to_copy; |
990 |
memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
|
991 |
} |
992 |
} |
993 |
} |
994 |
return p;
|
995 |
} |
996 |
|
997 |
static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm, |
998 |
struct image_info *info)
|
999 |
{ |
1000 |
abi_ulong stack_base, size, error; |
1001 |
int i;
|
1002 |
|
1003 |
/* Create enough stack to hold everything. If we don't use
|
1004 |
* it for args, we'll use it for something else...
|
1005 |
*/
|
1006 |
size = guest_stack_size; |
1007 |
if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE)
|
1008 |
size = MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
1009 |
error = target_mmap(0,
|
1010 |
size + qemu_host_page_size, |
1011 |
PROT_READ | PROT_WRITE, |
1012 |
MAP_PRIVATE | MAP_ANONYMOUS, |
1013 |
-1, 0); |
1014 |
if (error == -1) { |
1015 |
perror("stk mmap");
|
1016 |
exit(-1);
|
1017 |
} |
1018 |
/* we reserve one extra page at the top of the stack as guard */
|
1019 |
target_mprotect(error + size, qemu_host_page_size, PROT_NONE); |
1020 |
|
1021 |
info->stack_limit = error; |
1022 |
stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
1023 |
p += stack_base; |
1024 |
|
1025 |
for (i = 0 ; i < MAX_ARG_PAGES ; i++) { |
1026 |
if (bprm->page[i]) {
|
1027 |
info->rss++; |
1028 |
/* FIXME - check return value of memcpy_to_target() for failure */
|
1029 |
memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE); |
1030 |
free(bprm->page[i]); |
1031 |
} |
1032 |
stack_base += TARGET_PAGE_SIZE; |
1033 |
} |
1034 |
return p;
|
1035 |
} |
1036 |
|
1037 |
/* Map and zero the bss. We need to explicitly zero any fractional pages
|
1038 |
after the data section (i.e. bss). */
|
1039 |
static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot) |
1040 |
{ |
1041 |
uintptr_t host_start, host_map_start, host_end; |
1042 |
|
1043 |
last_bss = TARGET_PAGE_ALIGN(last_bss); |
1044 |
|
1045 |
/* ??? There is confusion between qemu_real_host_page_size and
|
1046 |
qemu_host_page_size here and elsewhere in target_mmap, which
|
1047 |
may lead to the end of the data section mapping from the file
|
1048 |
not being mapped. At least there was an explicit test and
|
1049 |
comment for that here, suggesting that "the file size must
|
1050 |
be known". The comment probably pre-dates the introduction
|
1051 |
of the fstat system call in target_mmap which does in fact
|
1052 |
find out the size. What isn't clear is if the workaround
|
1053 |
here is still actually needed. For now, continue with it,
|
1054 |
but merge it with the "normal" mmap that would allocate the bss. */
|
1055 |
|
1056 |
host_start = (uintptr_t) g2h(elf_bss); |
1057 |
host_end = (uintptr_t) g2h(last_bss); |
1058 |
host_map_start = (host_start + qemu_real_host_page_size - 1);
|
1059 |
host_map_start &= -qemu_real_host_page_size; |
1060 |
|
1061 |
if (host_map_start < host_end) {
|
1062 |
void *p = mmap((void *)host_map_start, host_end - host_map_start, |
1063 |
prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
1064 |
if (p == MAP_FAILED) {
|
1065 |
perror("cannot mmap brk");
|
1066 |
exit(-1);
|
1067 |
} |
1068 |
|
1069 |
/* Since we didn't use target_mmap, make sure to record
|
1070 |
the validity of the pages with qemu. */
|
1071 |
page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot|PAGE_VALID); |
1072 |
} |
1073 |
|
1074 |
if (host_start < host_map_start) {
|
1075 |
memset((void *)host_start, 0, host_map_start - host_start); |
1076 |
} |
1077 |
} |
1078 |
|
1079 |
static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, |
1080 |
struct elfhdr * exec,
|
1081 |
abi_ulong load_addr, |
1082 |
abi_ulong load_bias, |
1083 |
abi_ulong interp_load_addr, int ibcs,
|
1084 |
struct image_info *info)
|
1085 |
{ |
1086 |
abi_ulong sp; |
1087 |
int size;
|
1088 |
abi_ulong u_platform; |
1089 |
const char *k_platform; |
1090 |
const int n = sizeof(elf_addr_t); |
1091 |
|
1092 |
sp = p; |
1093 |
u_platform = 0;
|
1094 |
k_platform = ELF_PLATFORM; |
1095 |
if (k_platform) {
|
1096 |
size_t len = strlen(k_platform) + 1;
|
1097 |
sp -= (len + n - 1) & ~(n - 1); |
1098 |
u_platform = sp; |
1099 |
/* FIXME - check return value of memcpy_to_target() for failure */
|
1100 |
memcpy_to_target(sp, k_platform, len); |
1101 |
} |
1102 |
/*
|
1103 |
* Force 16 byte _final_ alignment here for generality.
|
1104 |
*/
|
1105 |
sp = sp &~ (abi_ulong)15;
|
1106 |
size = (DLINFO_ITEMS + 1) * 2; |
1107 |
if (k_platform)
|
1108 |
size += 2;
|
1109 |
#ifdef DLINFO_ARCH_ITEMS
|
1110 |
size += DLINFO_ARCH_ITEMS * 2;
|
1111 |
#endif
|
1112 |
size += envc + argc + 2;
|
1113 |
size += (!ibcs ? 3 : 1); /* argc itself */ |
1114 |
size *= n; |
1115 |
if (size & 15) |
1116 |
sp -= 16 - (size & 15); |
1117 |
|
1118 |
/* This is correct because Linux defines
|
1119 |
* elf_addr_t as Elf32_Off / Elf64_Off
|
1120 |
*/
|
1121 |
#define NEW_AUX_ENT(id, val) do { \ |
1122 |
sp -= n; put_user_ual(val, sp); \ |
1123 |
sp -= n; put_user_ual(id, sp); \ |
1124 |
} while(0) |
1125 |
|
1126 |
NEW_AUX_ENT (AT_NULL, 0);
|
1127 |
|
1128 |
/* There must be exactly DLINFO_ITEMS entries here. */
|
1129 |
NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff)); |
1130 |
NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr))); |
1131 |
NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum)); |
1132 |
NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE)); |
1133 |
NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr)); |
1134 |
NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
|
1135 |
NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry); |
1136 |
NEW_AUX_ENT(AT_UID, (abi_ulong) getuid()); |
1137 |
NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid()); |
1138 |
NEW_AUX_ENT(AT_GID, (abi_ulong) getgid()); |
1139 |
NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid()); |
1140 |
NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP); |
1141 |
NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK)); |
1142 |
if (k_platform)
|
1143 |
NEW_AUX_ENT(AT_PLATFORM, u_platform); |
1144 |
#ifdef ARCH_DLINFO
|
1145 |
/*
|
1146 |
* ARCH_DLINFO must come last so platform specific code can enforce
|
1147 |
* special alignment requirements on the AUXV if necessary (eg. PPC).
|
1148 |
*/
|
1149 |
ARCH_DLINFO; |
1150 |
#endif
|
1151 |
#undef NEW_AUX_ENT
|
1152 |
|
1153 |
info->saved_auxv = sp; |
1154 |
|
1155 |
sp = loader_build_argptr(envc, argc, sp, p, !ibcs); |
1156 |
return sp;
|
1157 |
} |
1158 |
|
1159 |
|
1160 |
static abi_ulong load_elf_interp(struct elfhdr * interp_elf_ex, |
1161 |
int interpreter_fd,
|
1162 |
abi_ulong *interp_load_addr) |
1163 |
{ |
1164 |
struct elf_phdr *elf_phdata = NULL; |
1165 |
struct elf_phdr *eppnt;
|
1166 |
abi_ulong load_addr = 0;
|
1167 |
int load_addr_set = 0; |
1168 |
int retval;
|
1169 |
abi_ulong error; |
1170 |
int i;
|
1171 |
|
1172 |
error = 0;
|
1173 |
|
1174 |
#ifdef BSWAP_NEEDED
|
1175 |
bswap_ehdr(interp_elf_ex); |
1176 |
#endif
|
1177 |
/* First of all, some simple consistency checks */
|
1178 |
if ((interp_elf_ex->e_type != ET_EXEC &&
|
1179 |
interp_elf_ex->e_type != ET_DYN) || |
1180 |
!elf_check_arch(interp_elf_ex->e_machine)) { |
1181 |
return ~((abi_ulong)0UL); |
1182 |
} |
1183 |
|
1184 |
|
1185 |
/* Now read in all of the header information */
|
1186 |
|
1187 |
if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE) |
1188 |
return ~(abi_ulong)0UL; |
1189 |
|
1190 |
elf_phdata = (struct elf_phdr *)
|
1191 |
malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); |
1192 |
|
1193 |
if (!elf_phdata)
|
1194 |
return ~((abi_ulong)0UL); |
1195 |
|
1196 |
/*
|
1197 |
* If the size of this structure has changed, then punt, since
|
1198 |
* we will be doing the wrong thing.
|
1199 |
*/
|
1200 |
if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) { |
1201 |
free(elf_phdata); |
1202 |
return ~((abi_ulong)0UL); |
1203 |
} |
1204 |
|
1205 |
retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET); |
1206 |
if(retval >= 0) { |
1207 |
retval = read(interpreter_fd, |
1208 |
(char *) elf_phdata,
|
1209 |
sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); |
1210 |
} |
1211 |
if (retval < 0) { |
1212 |
perror("load_elf_interp");
|
1213 |
exit(-1);
|
1214 |
free (elf_phdata); |
1215 |
return retval;
|
1216 |
} |
1217 |
#ifdef BSWAP_NEEDED
|
1218 |
eppnt = elf_phdata; |
1219 |
for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) { |
1220 |
bswap_phdr(eppnt); |
1221 |
} |
1222 |
#endif
|
1223 |
|
1224 |
if (interp_elf_ex->e_type == ET_DYN) {
|
1225 |
/* in order to avoid hardcoding the interpreter load
|
1226 |
address in qemu, we allocate a big enough memory zone */
|
1227 |
error = target_mmap(0, INTERP_MAP_SIZE,
|
1228 |
PROT_NONE, MAP_PRIVATE | MAP_ANON, |
1229 |
-1, 0); |
1230 |
if (error == -1) { |
1231 |
perror("mmap");
|
1232 |
exit(-1);
|
1233 |
} |
1234 |
load_addr = error; |
1235 |
load_addr_set = 1;
|
1236 |
} |
1237 |
|
1238 |
eppnt = elf_phdata; |
1239 |
for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) |
1240 |
if (eppnt->p_type == PT_LOAD) {
|
1241 |
int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
|
1242 |
int elf_prot = 0; |
1243 |
abi_ulong vaddr = 0;
|
1244 |
|
1245 |
if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
|
1246 |
if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
|
1247 |
if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
|
1248 |
if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) {
|
1249 |
elf_type |= MAP_FIXED; |
1250 |
vaddr = eppnt->p_vaddr; |
1251 |
} |
1252 |
error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr), |
1253 |
eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr), |
1254 |
elf_prot, |
1255 |
elf_type, |
1256 |
interpreter_fd, |
1257 |
eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr)); |
1258 |
|
1259 |
if (error == -1) { |
1260 |
/* Real error */
|
1261 |
close(interpreter_fd); |
1262 |
free(elf_phdata); |
1263 |
return ~((abi_ulong)0UL); |
1264 |
} |
1265 |
|
1266 |
if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
|
1267 |
load_addr = error; |
1268 |
load_addr_set = 1;
|
1269 |
} |
1270 |
|
1271 |
/* If the load segment requests extra zeros (e.g. bss), map it. */
|
1272 |
if (eppnt->p_filesz < eppnt->p_memsz) {
|
1273 |
abi_ulong base = load_addr + eppnt->p_vaddr; |
1274 |
zero_bss(base + eppnt->p_filesz, |
1275 |
base + eppnt->p_memsz, elf_prot); |
1276 |
} |
1277 |
} |
1278 |
|
1279 |
/* Now use mmap to map the library into memory. */
|
1280 |
|
1281 |
close(interpreter_fd); |
1282 |
free(elf_phdata); |
1283 |
|
1284 |
*interp_load_addr = load_addr; |
1285 |
return ((abi_ulong) interp_elf_ex->e_entry) + load_addr;
|
1286 |
} |
1287 |
|
1288 |
static int symfind(const void *s0, const void *s1) |
1289 |
{ |
1290 |
struct elf_sym *key = (struct elf_sym *)s0; |
1291 |
struct elf_sym *sym = (struct elf_sym *)s1; |
1292 |
int result = 0; |
1293 |
if (key->st_value < sym->st_value) {
|
1294 |
result = -1;
|
1295 |
} else if (key->st_value >= sym->st_value + sym->st_size) { |
1296 |
result = 1;
|
1297 |
} |
1298 |
return result;
|
1299 |
} |
1300 |
|
1301 |
static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr) |
1302 |
{ |
1303 |
#if ELF_CLASS == ELFCLASS32
|
1304 |
struct elf_sym *syms = s->disas_symtab.elf32;
|
1305 |
#else
|
1306 |
struct elf_sym *syms = s->disas_symtab.elf64;
|
1307 |
#endif
|
1308 |
|
1309 |
// binary search
|
1310 |
struct elf_sym key;
|
1311 |
struct elf_sym *sym;
|
1312 |
|
1313 |
key.st_value = orig_addr; |
1314 |
|
1315 |
sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), symfind);
|
1316 |
if (sym != NULL) { |
1317 |
return s->disas_strtab + sym->st_name;
|
1318 |
} |
1319 |
|
1320 |
return ""; |
1321 |
} |
1322 |
|
1323 |
/* FIXME: This should use elf_ops.h */
|
1324 |
static int symcmp(const void *s0, const void *s1) |
1325 |
{ |
1326 |
struct elf_sym *sym0 = (struct elf_sym *)s0; |
1327 |
struct elf_sym *sym1 = (struct elf_sym *)s1; |
1328 |
return (sym0->st_value < sym1->st_value)
|
1329 |
? -1
|
1330 |
: ((sym0->st_value > sym1->st_value) ? 1 : 0); |
1331 |
} |
1332 |
|
1333 |
/* Best attempt to load symbols from this ELF object. */
|
1334 |
static void load_symbols(struct elfhdr *hdr, int fd) |
1335 |
{ |
1336 |
unsigned int i, nsyms; |
1337 |
struct elf_shdr sechdr, symtab, strtab;
|
1338 |
char *strings;
|
1339 |
struct syminfo *s;
|
1340 |
struct elf_sym *syms;
|
1341 |
|
1342 |
lseek(fd, hdr->e_shoff, SEEK_SET); |
1343 |
for (i = 0; i < hdr->e_shnum; i++) { |
1344 |
if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr)) |
1345 |
return;
|
1346 |
#ifdef BSWAP_NEEDED
|
1347 |
bswap_shdr(&sechdr); |
1348 |
#endif
|
1349 |
if (sechdr.sh_type == SHT_SYMTAB) {
|
1350 |
symtab = sechdr; |
1351 |
lseek(fd, hdr->e_shoff |
1352 |
+ sizeof(sechdr) * sechdr.sh_link, SEEK_SET);
|
1353 |
if (read(fd, &strtab, sizeof(strtab)) |
1354 |
!= sizeof(strtab))
|
1355 |
return;
|
1356 |
#ifdef BSWAP_NEEDED
|
1357 |
bswap_shdr(&strtab); |
1358 |
#endif
|
1359 |
goto found;
|
1360 |
} |
1361 |
} |
1362 |
return; /* Shouldn't happen... */ |
1363 |
|
1364 |
found:
|
1365 |
/* Now know where the strtab and symtab are. Snarf them. */
|
1366 |
s = malloc(sizeof(*s));
|
1367 |
syms = malloc(symtab.sh_size); |
1368 |
if (!syms)
|
1369 |
return;
|
1370 |
s->disas_strtab = strings = malloc(strtab.sh_size); |
1371 |
if (!s->disas_strtab)
|
1372 |
return;
|
1373 |
|
1374 |
lseek(fd, symtab.sh_offset, SEEK_SET); |
1375 |
if (read(fd, syms, symtab.sh_size) != symtab.sh_size)
|
1376 |
return;
|
1377 |
|
1378 |
nsyms = symtab.sh_size / sizeof(struct elf_sym); |
1379 |
|
1380 |
i = 0;
|
1381 |
while (i < nsyms) {
|
1382 |
#ifdef BSWAP_NEEDED
|
1383 |
bswap_sym(syms + i); |
1384 |
#endif
|
1385 |
// Throw away entries which we do not need.
|
1386 |
if (syms[i].st_shndx == SHN_UNDEF ||
|
1387 |
syms[i].st_shndx >= SHN_LORESERVE || |
1388 |
ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) { |
1389 |
nsyms--; |
1390 |
if (i < nsyms) {
|
1391 |
syms[i] = syms[nsyms]; |
1392 |
} |
1393 |
continue;
|
1394 |
} |
1395 |
#if defined(TARGET_ARM) || defined (TARGET_MIPS)
|
1396 |
/* The bottom address bit marks a Thumb or MIPS16 symbol. */
|
1397 |
syms[i].st_value &= ~(target_ulong)1;
|
1398 |
#endif
|
1399 |
i++; |
1400 |
} |
1401 |
syms = realloc(syms, nsyms * sizeof(*syms));
|
1402 |
|
1403 |
qsort(syms, nsyms, sizeof(*syms), symcmp);
|
1404 |
|
1405 |
lseek(fd, strtab.sh_offset, SEEK_SET); |
1406 |
if (read(fd, strings, strtab.sh_size) != strtab.sh_size)
|
1407 |
return;
|
1408 |
s->disas_num_syms = nsyms; |
1409 |
#if ELF_CLASS == ELFCLASS32
|
1410 |
s->disas_symtab.elf32 = syms; |
1411 |
s->lookup_symbol = lookup_symbolxx; |
1412 |
#else
|
1413 |
s->disas_symtab.elf64 = syms; |
1414 |
s->lookup_symbol = lookup_symbolxx; |
1415 |
#endif
|
1416 |
s->next = syminfos; |
1417 |
syminfos = s; |
1418 |
} |
1419 |
|
1420 |
int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
1421 |
struct image_info * info)
|
1422 |
{ |
1423 |
struct elfhdr elf_ex;
|
1424 |
struct elfhdr interp_elf_ex;
|
1425 |
struct exec interp_ex;
|
1426 |
int interpreter_fd = -1; /* avoid warning */ |
1427 |
abi_ulong load_addr, load_bias; |
1428 |
int load_addr_set = 0; |
1429 |
unsigned int interpreter_type = INTERPRETER_NONE; |
1430 |
unsigned char ibcs2_interpreter; |
1431 |
int i;
|
1432 |
abi_ulong mapped_addr; |
1433 |
struct elf_phdr * elf_ppnt;
|
1434 |
struct elf_phdr *elf_phdata;
|
1435 |
abi_ulong k, elf_brk; |
1436 |
int retval;
|
1437 |
char * elf_interpreter;
|
1438 |
abi_ulong elf_entry, interp_load_addr = 0;
|
1439 |
int status;
|
1440 |
abi_ulong start_code, end_code, start_data, end_data; |
1441 |
abi_ulong reloc_func_desc = 0;
|
1442 |
abi_ulong elf_stack; |
1443 |
char passed_fileno[6]; |
1444 |
|
1445 |
ibcs2_interpreter = 0;
|
1446 |
status = 0;
|
1447 |
load_addr = 0;
|
1448 |
load_bias = 0;
|
1449 |
elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */ |
1450 |
#ifdef BSWAP_NEEDED
|
1451 |
bswap_ehdr(&elf_ex); |
1452 |
#endif
|
1453 |
|
1454 |
/* First of all, some simple consistency checks */
|
1455 |
if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||
|
1456 |
(! elf_check_arch(elf_ex.e_machine))) { |
1457 |
return -ENOEXEC;
|
1458 |
} |
1459 |
|
1460 |
bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
|
1461 |
bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p); |
1462 |
bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p); |
1463 |
if (!bprm->p) {
|
1464 |
retval = -E2BIG; |
1465 |
} |
1466 |
|
1467 |
/* Now read in all of the header information */
|
1468 |
elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum);
|
1469 |
if (elf_phdata == NULL) { |
1470 |
return -ENOMEM;
|
1471 |
} |
1472 |
|
1473 |
retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET); |
1474 |
if(retval > 0) { |
1475 |
retval = read(bprm->fd, (char *) elf_phdata,
|
1476 |
elf_ex.e_phentsize * elf_ex.e_phnum); |
1477 |
} |
1478 |
|
1479 |
if (retval < 0) { |
1480 |
perror("load_elf_binary");
|
1481 |
exit(-1);
|
1482 |
free (elf_phdata); |
1483 |
return -errno;
|
1484 |
} |
1485 |
|
1486 |
#ifdef BSWAP_NEEDED
|
1487 |
elf_ppnt = elf_phdata; |
1488 |
for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) { |
1489 |
bswap_phdr(elf_ppnt); |
1490 |
} |
1491 |
#endif
|
1492 |
elf_ppnt = elf_phdata; |
1493 |
|
1494 |
elf_brk = 0;
|
1495 |
|
1496 |
elf_stack = ~((abi_ulong)0UL);
|
1497 |
elf_interpreter = NULL;
|
1498 |
start_code = ~((abi_ulong)0UL);
|
1499 |
end_code = 0;
|
1500 |
start_data = 0;
|
1501 |
end_data = 0;
|
1502 |
interp_ex.a_info = 0;
|
1503 |
|
1504 |
for(i=0;i < elf_ex.e_phnum; i++) { |
1505 |
if (elf_ppnt->p_type == PT_INTERP) {
|
1506 |
if ( elf_interpreter != NULL ) |
1507 |
{ |
1508 |
free (elf_phdata); |
1509 |
free(elf_interpreter); |
1510 |
close(bprm->fd); |
1511 |
return -EINVAL;
|
1512 |
} |
1513 |
|
1514 |
/* This is the program interpreter used for
|
1515 |
* shared libraries - for now assume that this
|
1516 |
* is an a.out format binary
|
1517 |
*/
|
1518 |
|
1519 |
elf_interpreter = (char *)malloc(elf_ppnt->p_filesz);
|
1520 |
|
1521 |
if (elf_interpreter == NULL) { |
1522 |
free (elf_phdata); |
1523 |
close(bprm->fd); |
1524 |
return -ENOMEM;
|
1525 |
} |
1526 |
|
1527 |
retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET); |
1528 |
if(retval >= 0) { |
1529 |
retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz); |
1530 |
} |
1531 |
if(retval < 0) { |
1532 |
perror("load_elf_binary2");
|
1533 |
exit(-1);
|
1534 |
} |
1535 |
|
1536 |
/* If the program interpreter is one of these two,
|
1537 |
then assume an iBCS2 image. Otherwise assume
|
1538 |
a native linux image. */
|
1539 |
|
1540 |
/* JRP - Need to add X86 lib dir stuff here... */
|
1541 |
|
1542 |
if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 || |
1543 |
strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) { |
1544 |
ibcs2_interpreter = 1;
|
1545 |
} |
1546 |
|
1547 |
#if 0
|
1548 |
printf("Using ELF interpreter %s\n", path(elf_interpreter));
|
1549 |
#endif
|
1550 |
if (retval >= 0) { |
1551 |
retval = open(path(elf_interpreter), O_RDONLY); |
1552 |
if(retval >= 0) { |
1553 |
interpreter_fd = retval; |
1554 |
} |
1555 |
else {
|
1556 |
perror(elf_interpreter); |
1557 |
exit(-1);
|
1558 |
/* retval = -errno; */
|
1559 |
} |
1560 |
} |
1561 |
|
1562 |
if (retval >= 0) { |
1563 |
retval = lseek(interpreter_fd, 0, SEEK_SET);
|
1564 |
if(retval >= 0) { |
1565 |
retval = read(interpreter_fd,bprm->buf,128);
|
1566 |
} |
1567 |
} |
1568 |
if (retval >= 0) { |
1569 |
interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */ |
1570 |
interp_elf_ex = *((struct elfhdr *) bprm->buf); /* elf exec-header */ |
1571 |
} |
1572 |
if (retval < 0) { |
1573 |
perror("load_elf_binary3");
|
1574 |
exit(-1);
|
1575 |
free (elf_phdata); |
1576 |
free(elf_interpreter); |
1577 |
close(bprm->fd); |
1578 |
return retval;
|
1579 |
} |
1580 |
} |
1581 |
elf_ppnt++; |
1582 |
} |
1583 |
|
1584 |
/* Some simple consistency checks for the interpreter */
|
1585 |
if (elf_interpreter){
|
1586 |
interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT; |
1587 |
|
1588 |
/* Now figure out which format our binary is */
|
1589 |
if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) &&
|
1590 |
(N_MAGIC(interp_ex) != QMAGIC)) { |
1591 |
interpreter_type = INTERPRETER_ELF; |
1592 |
} |
1593 |
|
1594 |
if (interp_elf_ex.e_ident[0] != 0x7f || |
1595 |
strncmp((char *)&interp_elf_ex.e_ident[1], "ELF",3) != 0) { |
1596 |
interpreter_type &= ~INTERPRETER_ELF; |
1597 |
} |
1598 |
|
1599 |
if (!interpreter_type) {
|
1600 |
free(elf_interpreter); |
1601 |
free(elf_phdata); |
1602 |
close(bprm->fd); |
1603 |
return -ELIBBAD;
|
1604 |
} |
1605 |
} |
1606 |
|
1607 |
/* OK, we are done with that, now set up the arg stuff,
|
1608 |
and then start this sucker up */
|
1609 |
|
1610 |
{ |
1611 |
char * passed_p;
|
1612 |
|
1613 |
if (interpreter_type == INTERPRETER_AOUT) {
|
1614 |
snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd); |
1615 |
passed_p = passed_fileno; |
1616 |
|
1617 |
if (elf_interpreter) {
|
1618 |
bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p);
|
1619 |
bprm->argc++; |
1620 |
} |
1621 |
} |
1622 |
if (!bprm->p) {
|
1623 |
if (elf_interpreter) {
|
1624 |
free(elf_interpreter); |
1625 |
} |
1626 |
free (elf_phdata); |
1627 |
close(bprm->fd); |
1628 |
return -E2BIG;
|
1629 |
} |
1630 |
} |
1631 |
|
1632 |
/* OK, This is the point of no return */
|
1633 |
info->end_data = 0;
|
1634 |
info->end_code = 0;
|
1635 |
info->start_mmap = (abi_ulong)ELF_START_MMAP; |
1636 |
info->mmap = 0;
|
1637 |
elf_entry = (abi_ulong) elf_ex.e_entry; |
1638 |
|
1639 |
#if defined(CONFIG_USE_GUEST_BASE)
|
1640 |
/*
|
1641 |
* In case where user has not explicitly set the guest_base, we
|
1642 |
* probe here that should we set it automatically.
|
1643 |
*/
|
1644 |
if (!(have_guest_base || reserved_va)) {
|
1645 |
/*
|
1646 |
* Go through ELF program header table and find the address
|
1647 |
* range used by loadable segments. Check that this is available on
|
1648 |
* the host, and if not find a suitable value for guest_base. */
|
1649 |
abi_ulong app_start = ~0;
|
1650 |
abi_ulong app_end = 0;
|
1651 |
abi_ulong addr; |
1652 |
unsigned long host_start; |
1653 |
unsigned long real_start; |
1654 |
unsigned long host_size; |
1655 |
for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; |
1656 |
i++, elf_ppnt++) { |
1657 |
if (elf_ppnt->p_type != PT_LOAD)
|
1658 |
continue;
|
1659 |
addr = elf_ppnt->p_vaddr; |
1660 |
if (addr < app_start) {
|
1661 |
app_start = addr; |
1662 |
} |
1663 |
addr += elf_ppnt->p_memsz; |
1664 |
if (addr > app_end) {
|
1665 |
app_end = addr; |
1666 |
} |
1667 |
} |
1668 |
|
1669 |
/* If we don't have any loadable segments then something
|
1670 |
is very wrong. */
|
1671 |
assert(app_start < app_end); |
1672 |
|
1673 |
/* Round addresses to page boundaries. */
|
1674 |
app_start = app_start & qemu_host_page_mask; |
1675 |
app_end = HOST_PAGE_ALIGN(app_end); |
1676 |
if (app_start < mmap_min_addr) {
|
1677 |
host_start = HOST_PAGE_ALIGN(mmap_min_addr); |
1678 |
} else {
|
1679 |
host_start = app_start; |
1680 |
if (host_start != app_start) {
|
1681 |
fprintf(stderr, "qemu: Address overflow loading ELF binary\n");
|
1682 |
abort(); |
1683 |
} |
1684 |
} |
1685 |
host_size = app_end - app_start; |
1686 |
while (1) { |
1687 |
/* Do not use mmap_find_vma here because that is limited to the
|
1688 |
guest address space. We are going to make the
|
1689 |
guest address space fit whatever we're given. */
|
1690 |
real_start = (unsigned long)mmap((void *)host_start, host_size, |
1691 |
PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE, -1, 0); |
1692 |
if (real_start == (unsigned long)-1) { |
1693 |
fprintf(stderr, "qemu: Virtual memory exausted\n");
|
1694 |
abort(); |
1695 |
} |
1696 |
if (real_start == host_start) {
|
1697 |
break;
|
1698 |
} |
1699 |
/* That address didn't work. Unmap and try a different one.
|
1700 |
The address the host picked because is typically
|
1701 |
right at the top of the host address space and leaves the
|
1702 |
guest with no usable address space. Resort to a linear search.
|
1703 |
We already compensated for mmap_min_addr, so this should not
|
1704 |
happen often. Probably means we got unlucky and host address
|
1705 |
space randomization put a shared library somewhere
|
1706 |
inconvenient. */
|
1707 |
munmap((void *)real_start, host_size);
|
1708 |
host_start += qemu_host_page_size; |
1709 |
if (host_start == app_start) {
|
1710 |
/* Theoretically possible if host doesn't have any
|
1711 |
suitably aligned areas. Normally the first mmap will
|
1712 |
fail. */
|
1713 |
fprintf(stderr, "qemu: Unable to find space for application\n");
|
1714 |
abort(); |
1715 |
} |
1716 |
} |
1717 |
qemu_log("Relocating guest address space from 0x" TARGET_ABI_FMT_lx
|
1718 |
" to 0x%lx\n", app_start, real_start);
|
1719 |
guest_base = real_start - app_start; |
1720 |
} |
1721 |
#endif /* CONFIG_USE_GUEST_BASE */ |
1722 |
|
1723 |
/* Do this so that we can load the interpreter, if need be. We will
|
1724 |
change some of these later */
|
1725 |
info->rss = 0;
|
1726 |
bprm->p = setup_arg_pages(bprm->p, bprm, info); |
1727 |
info->start_stack = bprm->p; |
1728 |
|
1729 |
/* Now we do a little grungy work by mmaping the ELF image into
|
1730 |
* the correct location in memory. At this point, we assume that
|
1731 |
* the image should be loaded at fixed address, not at a variable
|
1732 |
* address.
|
1733 |
*/
|
1734 |
|
1735 |
for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) { |
1736 |
int elf_prot = 0; |
1737 |
int elf_flags = 0; |
1738 |
abi_ulong error; |
1739 |
|
1740 |
if (elf_ppnt->p_type != PT_LOAD)
|
1741 |
continue;
|
1742 |
|
1743 |
if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
|
1744 |
if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
|
1745 |
if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
|
1746 |
elf_flags = MAP_PRIVATE | MAP_DENYWRITE; |
1747 |
if (elf_ex.e_type == ET_EXEC || load_addr_set) {
|
1748 |
elf_flags |= MAP_FIXED; |
1749 |
} else if (elf_ex.e_type == ET_DYN) { |
1750 |
/* Try and get dynamic programs out of the way of the default mmap
|
1751 |
base, as well as whatever program they might try to exec. This
|
1752 |
is because the brk will follow the loader, and is not movable. */
|
1753 |
/* NOTE: for qemu, we do a big mmap to get enough space
|
1754 |
without hardcoding any address */
|
1755 |
error = target_mmap(0, ET_DYN_MAP_SIZE,
|
1756 |
PROT_NONE, MAP_PRIVATE | MAP_ANON, |
1757 |
-1, 0); |
1758 |
if (error == -1) { |
1759 |
perror("mmap");
|
1760 |
exit(-1);
|
1761 |
} |
1762 |
load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr); |
1763 |
} |
1764 |
|
1765 |
error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr), |
1766 |
(elf_ppnt->p_filesz + |
1767 |
TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)), |
1768 |
elf_prot, |
1769 |
(MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE), |
1770 |
bprm->fd, |
1771 |
(elf_ppnt->p_offset - |
1772 |
TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr))); |
1773 |
if (error == -1) { |
1774 |
perror("mmap");
|
1775 |
exit(-1);
|
1776 |
} |
1777 |
|
1778 |
#ifdef LOW_ELF_STACK
|
1779 |
if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
|
1780 |
elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr); |
1781 |
#endif
|
1782 |
|
1783 |
if (!load_addr_set) {
|
1784 |
load_addr_set = 1;
|
1785 |
load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset; |
1786 |
if (elf_ex.e_type == ET_DYN) {
|
1787 |
load_bias += error - |
1788 |
TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr); |
1789 |
load_addr += load_bias; |
1790 |
reloc_func_desc = load_bias; |
1791 |
} |
1792 |
} |
1793 |
k = elf_ppnt->p_vaddr; |
1794 |
if (k < start_code)
|
1795 |
start_code = k; |
1796 |
if (start_data < k)
|
1797 |
start_data = k; |
1798 |
k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; |
1799 |
if ((elf_ppnt->p_flags & PF_X) && end_code < k)
|
1800 |
end_code = k; |
1801 |
if (end_data < k)
|
1802 |
end_data = k; |
1803 |
k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz; |
1804 |
if (k > elf_brk) {
|
1805 |
elf_brk = TARGET_PAGE_ALIGN(k); |
1806 |
} |
1807 |
|
1808 |
/* If the load segment requests extra zeros (e.g. bss), map it. */
|
1809 |
if (elf_ppnt->p_filesz < elf_ppnt->p_memsz) {
|
1810 |
abi_ulong base = load_bias + elf_ppnt->p_vaddr; |
1811 |
zero_bss(base + elf_ppnt->p_filesz, |
1812 |
base + elf_ppnt->p_memsz, elf_prot); |
1813 |
} |
1814 |
} |
1815 |
|
1816 |
elf_entry += load_bias; |
1817 |
elf_brk += load_bias; |
1818 |
start_code += load_bias; |
1819 |
end_code += load_bias; |
1820 |
start_data += load_bias; |
1821 |
end_data += load_bias; |
1822 |
|
1823 |
if (elf_interpreter) {
|
1824 |
if (interpreter_type & 1) { |
1825 |
elf_entry = load_aout_interp(&interp_ex, interpreter_fd); |
1826 |
} |
1827 |
else if (interpreter_type & 2) { |
1828 |
elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd, |
1829 |
&interp_load_addr); |
1830 |
} |
1831 |
reloc_func_desc = interp_load_addr; |
1832 |
|
1833 |
close(interpreter_fd); |
1834 |
free(elf_interpreter); |
1835 |
|
1836 |
if (elf_entry == ~((abi_ulong)0UL)) { |
1837 |
printf("Unable to load interpreter\n");
|
1838 |
free(elf_phdata); |
1839 |
exit(-1);
|
1840 |
return 0; |
1841 |
} |
1842 |
} |
1843 |
|
1844 |
free(elf_phdata); |
1845 |
|
1846 |
if (qemu_log_enabled())
|
1847 |
load_symbols(&elf_ex, bprm->fd); |
1848 |
|
1849 |
if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd);
|
1850 |
info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX); |
1851 |
|
1852 |
#ifdef LOW_ELF_STACK
|
1853 |
info->start_stack = bprm->p = elf_stack - 4;
|
1854 |
#endif
|
1855 |
bprm->p = create_elf_tables(bprm->p, |
1856 |
bprm->argc, |
1857 |
bprm->envc, |
1858 |
&elf_ex, |
1859 |
load_addr, load_bias, |
1860 |
interp_load_addr, |
1861 |
(interpreter_type == INTERPRETER_AOUT ? 0 : 1), |
1862 |
info); |
1863 |
info->load_addr = reloc_func_desc; |
1864 |
info->start_brk = info->brk = elf_brk; |
1865 |
info->end_code = end_code; |
1866 |
info->start_code = start_code; |
1867 |
info->start_data = start_data; |
1868 |
info->end_data = end_data; |
1869 |
info->start_stack = bprm->p; |
1870 |
|
1871 |
#if 0
|
1872 |
printf("(start_brk) %x\n" , info->start_brk);
|
1873 |
printf("(end_code) %x\n" , info->end_code);
|
1874 |
printf("(start_code) %x\n" , info->start_code);
|
1875 |
printf("(end_data) %x\n" , info->end_data);
|
1876 |
printf("(start_stack) %x\n" , info->start_stack);
|
1877 |
printf("(brk) %x\n" , info->brk);
|
1878 |
#endif
|
1879 |
|
1880 |
if ( info->personality == PER_SVR4 )
|
1881 |
{ |
1882 |
/* Why this, you ask??? Well SVr4 maps page 0 as read-only,
|
1883 |
and some applications "depend" upon this behavior.
|
1884 |
Since we do not have the power to recompile these, we
|
1885 |
emulate the SVr4 behavior. Sigh. */
|
1886 |
mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
|
1887 |
MAP_FIXED | MAP_PRIVATE, -1, 0); |
1888 |
} |
1889 |
|
1890 |
info->entry = elf_entry; |
1891 |
|
1892 |
#ifdef USE_ELF_CORE_DUMP
|
1893 |
bprm->core_dump = &elf_core_dump; |
1894 |
#endif
|
1895 |
|
1896 |
return 0; |
1897 |
} |
1898 |
|
1899 |
#ifdef USE_ELF_CORE_DUMP
|
1900 |
|
1901 |
/*
|
1902 |
* Definitions to generate Intel SVR4-like core files.
|
1903 |
* These mostly have the same names as the SVR4 types with "target_elf_"
|
1904 |
* tacked on the front to prevent clashes with linux definitions,
|
1905 |
* and the typedef forms have been avoided. This is mostly like
|
1906 |
* the SVR4 structure, but more Linuxy, with things that Linux does
|
1907 |
* not support and which gdb doesn't really use excluded.
|
1908 |
*
|
1909 |
* Fields we don't dump (their contents is zero) in linux-user qemu
|
1910 |
* are marked with XXX.
|
1911 |
*
|
1912 |
* Core dump code is copied from linux kernel (fs/binfmt_elf.c).
|
1913 |
*
|
1914 |
* Porting ELF coredump for target is (quite) simple process. First you
|
1915 |
* define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
|
1916 |
* the target resides):
|
1917 |
*
|
1918 |
* #define USE_ELF_CORE_DUMP
|
1919 |
*
|
1920 |
* Next you define type of register set used for dumping. ELF specification
|
1921 |
* says that it needs to be array of elf_greg_t that has size of ELF_NREG.
|
1922 |
*
|
1923 |
* typedef <target_regtype> target_elf_greg_t;
|
1924 |
* #define ELF_NREG <number of registers>
|
1925 |
* typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
|
1926 |
*
|
1927 |
* Last step is to implement target specific function that copies registers
|
1928 |
* from given cpu into just specified register set. Prototype is:
|
1929 |
*
|
1930 |
* static void elf_core_copy_regs(taret_elf_gregset_t *regs,
|
1931 |
* const CPUState *env);
|
1932 |
*
|
1933 |
* Parameters:
|
1934 |
* regs - copy register values into here (allocated and zeroed by caller)
|
1935 |
* env - copy registers from here
|
1936 |
*
|
1937 |
* Example for ARM target is provided in this file.
|
1938 |
*/
|
1939 |
|
1940 |
/* An ELF note in memory */
|
1941 |
struct memelfnote {
|
1942 |
const char *name; |
1943 |
size_t namesz; |
1944 |
size_t namesz_rounded; |
1945 |
int type;
|
1946 |
size_t datasz; |
1947 |
void *data;
|
1948 |
size_t notesz; |
1949 |
}; |
1950 |
|
1951 |
struct target_elf_siginfo {
|
1952 |
int si_signo; /* signal number */ |
1953 |
int si_code; /* extra code */ |
1954 |
int si_errno; /* errno */ |
1955 |
}; |
1956 |
|
1957 |
struct target_elf_prstatus {
|
1958 |
struct target_elf_siginfo pr_info; /* Info associated with signal */ |
1959 |
short pr_cursig; /* Current signal */ |
1960 |
target_ulong pr_sigpend; /* XXX */
|
1961 |
target_ulong pr_sighold; /* XXX */
|
1962 |
target_pid_t pr_pid; |
1963 |
target_pid_t pr_ppid; |
1964 |
target_pid_t pr_pgrp; |
1965 |
target_pid_t pr_sid; |
1966 |
struct target_timeval pr_utime; /* XXX User time */ |
1967 |
struct target_timeval pr_stime; /* XXX System time */ |
1968 |
struct target_timeval pr_cutime; /* XXX Cumulative user time */ |
1969 |
struct target_timeval pr_cstime; /* XXX Cumulative system time */ |
1970 |
target_elf_gregset_t pr_reg; /* GP registers */
|
1971 |
int pr_fpvalid; /* XXX */ |
1972 |
}; |
1973 |
|
1974 |
#define ELF_PRARGSZ (80) /* Number of chars for args */ |
1975 |
|
1976 |
struct target_elf_prpsinfo {
|
1977 |
char pr_state; /* numeric process state */ |
1978 |
char pr_sname; /* char for pr_state */ |
1979 |
char pr_zomb; /* zombie */ |
1980 |
char pr_nice; /* nice val */ |
1981 |
target_ulong pr_flag; /* flags */
|
1982 |
target_uid_t pr_uid; |
1983 |
target_gid_t pr_gid; |
1984 |
target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; |
1985 |
/* Lots missing */
|
1986 |
char pr_fname[16]; /* filename of executable */ |
1987 |
char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ |
1988 |
}; |
1989 |
|
1990 |
/* Here is the structure in which status of each thread is captured. */
|
1991 |
struct elf_thread_status {
|
1992 |
QTAILQ_ENTRY(elf_thread_status) ets_link; |
1993 |
struct target_elf_prstatus prstatus; /* NT_PRSTATUS */ |
1994 |
#if 0
|
1995 |
elf_fpregset_t fpu; /* NT_PRFPREG */
|
1996 |
struct task_struct *thread;
|
1997 |
elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
|
1998 |
#endif
|
1999 |
struct memelfnote notes[1]; |
2000 |
int num_notes;
|
2001 |
}; |
2002 |
|
2003 |
struct elf_note_info {
|
2004 |
struct memelfnote *notes;
|
2005 |
struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */ |
2006 |
struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */ |
2007 |
|
2008 |
QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list; |
2009 |
#if 0
|
2010 |
/*
|
2011 |
* Current version of ELF coredump doesn't support
|
2012 |
* dumping fp regs etc.
|
2013 |
*/
|
2014 |
elf_fpregset_t *fpu;
|
2015 |
elf_fpxregset_t *xfpu;
|
2016 |
int thread_status_size;
|
2017 |
#endif
|
2018 |
int notes_size;
|
2019 |
int numnote;
|
2020 |
}; |
2021 |
|
2022 |
struct vm_area_struct {
|
2023 |
abi_ulong vma_start; /* start vaddr of memory region */
|
2024 |
abi_ulong vma_end; /* end vaddr of memory region */
|
2025 |
abi_ulong vma_flags; /* protection etc. flags for the region */
|
2026 |
QTAILQ_ENTRY(vm_area_struct) vma_link; |
2027 |
}; |
2028 |
|
2029 |
struct mm_struct {
|
2030 |
QTAILQ_HEAD(, vm_area_struct) mm_mmap; |
2031 |
int mm_count; /* number of mappings */ |
2032 |
}; |
2033 |
|
2034 |
static struct mm_struct *vma_init(void); |
2035 |
static void vma_delete(struct mm_struct *); |
2036 |
static int vma_add_mapping(struct mm_struct *, abi_ulong, |
2037 |
abi_ulong, abi_ulong); |
2038 |
static int vma_get_mapping_count(const struct mm_struct *); |
2039 |
static struct vm_area_struct *vma_first(const struct mm_struct *); |
2040 |
static struct vm_area_struct *vma_next(struct vm_area_struct *); |
2041 |
static abi_ulong vma_dump_size(const struct vm_area_struct *); |
2042 |
static int vma_walker(void *priv, abi_ulong start, abi_ulong end, |
2043 |
unsigned long flags); |
2044 |
|
2045 |
static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t); |
2046 |
static void fill_note(struct memelfnote *, const char *, int, |
2047 |
unsigned int, void *); |
2048 |
static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int); |
2049 |
static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *); |
2050 |
static void fill_auxv_note(struct memelfnote *, const TaskState *); |
2051 |
static void fill_elf_note_phdr(struct elf_phdr *, int, off_t); |
2052 |
static size_t note_size(const struct memelfnote *); |
2053 |
static void free_note_info(struct elf_note_info *); |
2054 |
static int fill_note_info(struct elf_note_info *, long, const CPUState *); |
2055 |
static void fill_thread_info(struct elf_note_info *, const CPUState *); |
2056 |
static int core_dump_filename(const TaskState *, char *, size_t); |
2057 |
|
2058 |
static int dump_write(int, const void *, size_t); |
2059 |
static int write_note(struct memelfnote *, int); |
2060 |
static int write_note_info(struct elf_note_info *, int); |
2061 |
|
2062 |
#ifdef BSWAP_NEEDED
|
2063 |
static void bswap_prstatus(struct target_elf_prstatus *); |
2064 |
static void bswap_psinfo(struct target_elf_prpsinfo *); |
2065 |
|
2066 |
static void bswap_prstatus(struct target_elf_prstatus *prstatus) |
2067 |
{ |
2068 |
prstatus->pr_info.si_signo = tswapl(prstatus->pr_info.si_signo); |
2069 |
prstatus->pr_info.si_code = tswapl(prstatus->pr_info.si_code); |
2070 |
prstatus->pr_info.si_errno = tswapl(prstatus->pr_info.si_errno); |
2071 |
prstatus->pr_cursig = tswap16(prstatus->pr_cursig); |
2072 |
prstatus->pr_sigpend = tswapl(prstatus->pr_sigpend); |
2073 |
prstatus->pr_sighold = tswapl(prstatus->pr_sighold); |
2074 |
prstatus->pr_pid = tswap32(prstatus->pr_pid); |
2075 |
prstatus->pr_ppid = tswap32(prstatus->pr_ppid); |
2076 |
prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp); |
2077 |
prstatus->pr_sid = tswap32(prstatus->pr_sid); |
2078 |
/* cpu times are not filled, so we skip them */
|
2079 |
/* regs should be in correct format already */
|
2080 |
prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid); |
2081 |
} |
2082 |
|
2083 |
static void bswap_psinfo(struct target_elf_prpsinfo *psinfo) |
2084 |
{ |
2085 |
psinfo->pr_flag = tswapl(psinfo->pr_flag); |
2086 |
psinfo->pr_uid = tswap16(psinfo->pr_uid); |
2087 |
psinfo->pr_gid = tswap16(psinfo->pr_gid); |
2088 |
psinfo->pr_pid = tswap32(psinfo->pr_pid); |
2089 |
psinfo->pr_ppid = tswap32(psinfo->pr_ppid); |
2090 |
psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp); |
2091 |
psinfo->pr_sid = tswap32(psinfo->pr_sid); |
2092 |
} |
2093 |
#endif /* BSWAP_NEEDED */ |
2094 |
|
2095 |
/*
|
2096 |
* Minimal support for linux memory regions. These are needed
|
2097 |
* when we are finding out what memory exactly belongs to
|
2098 |
* emulated process. No locks needed here, as long as
|
2099 |
* thread that received the signal is stopped.
|
2100 |
*/
|
2101 |
|
2102 |
static struct mm_struct *vma_init(void) |
2103 |
{ |
2104 |
struct mm_struct *mm;
|
2105 |
|
2106 |
if ((mm = qemu_malloc(sizeof (*mm))) == NULL) |
2107 |
return (NULL); |
2108 |
|
2109 |
mm->mm_count = 0;
|
2110 |
QTAILQ_INIT(&mm->mm_mmap); |
2111 |
|
2112 |
return (mm);
|
2113 |
} |
2114 |
|
2115 |
static void vma_delete(struct mm_struct *mm) |
2116 |
{ |
2117 |
struct vm_area_struct *vma;
|
2118 |
|
2119 |
while ((vma = vma_first(mm)) != NULL) { |
2120 |
QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link); |
2121 |
qemu_free(vma); |
2122 |
} |
2123 |
qemu_free(mm); |
2124 |
} |
2125 |
|
2126 |
static int vma_add_mapping(struct mm_struct *mm, abi_ulong start, |
2127 |
abi_ulong end, abi_ulong flags) |
2128 |
{ |
2129 |
struct vm_area_struct *vma;
|
2130 |
|
2131 |
if ((vma = qemu_mallocz(sizeof (*vma))) == NULL) |
2132 |
return (-1); |
2133 |
|
2134 |
vma->vma_start = start; |
2135 |
vma->vma_end = end; |
2136 |
vma->vma_flags = flags; |
2137 |
|
2138 |
QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link); |
2139 |
mm->mm_count++; |
2140 |
|
2141 |
return (0); |
2142 |
} |
2143 |
|
2144 |
static struct vm_area_struct *vma_first(const struct mm_struct *mm) |
2145 |
{ |
2146 |
return (QTAILQ_FIRST(&mm->mm_mmap));
|
2147 |
} |
2148 |
|
2149 |
static struct vm_area_struct *vma_next(struct vm_area_struct *vma) |
2150 |
{ |
2151 |
return (QTAILQ_NEXT(vma, vma_link));
|
2152 |
} |
2153 |
|
2154 |
static int vma_get_mapping_count(const struct mm_struct *mm) |
2155 |
{ |
2156 |
return (mm->mm_count);
|
2157 |
} |
2158 |
|
2159 |
/*
|
2160 |
* Calculate file (dump) size of given memory region.
|
2161 |
*/
|
2162 |
static abi_ulong vma_dump_size(const struct vm_area_struct *vma) |
2163 |
{ |
2164 |
/* if we cannot even read the first page, skip it */
|
2165 |
if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
|
2166 |
return (0); |
2167 |
|
2168 |
/*
|
2169 |
* Usually we don't dump executable pages as they contain
|
2170 |
* non-writable code that debugger can read directly from
|
2171 |
* target library etc. However, thread stacks are marked
|
2172 |
* also executable so we read in first page of given region
|
2173 |
* and check whether it contains elf header. If there is
|
2174 |
* no elf header, we dump it.
|
2175 |
*/
|
2176 |
if (vma->vma_flags & PROT_EXEC) {
|
2177 |
char page[TARGET_PAGE_SIZE];
|
2178 |
|
2179 |
copy_from_user(page, vma->vma_start, sizeof (page));
|
2180 |
if ((page[EI_MAG0] == ELFMAG0) &&
|
2181 |
(page[EI_MAG1] == ELFMAG1) && |
2182 |
(page[EI_MAG2] == ELFMAG2) && |
2183 |
(page[EI_MAG3] == ELFMAG3)) { |
2184 |
/*
|
2185 |
* Mappings are possibly from ELF binary. Don't dump
|
2186 |
* them.
|
2187 |
*/
|
2188 |
return (0); |
2189 |
} |
2190 |
} |
2191 |
|
2192 |
return (vma->vma_end - vma->vma_start);
|
2193 |
} |
2194 |
|
2195 |
static int vma_walker(void *priv, abi_ulong start, abi_ulong end, |
2196 |
unsigned long flags) |
2197 |
{ |
2198 |
struct mm_struct *mm = (struct mm_struct *)priv; |
2199 |
|
2200 |
vma_add_mapping(mm, start, end, flags); |
2201 |
return (0); |
2202 |
} |
2203 |
|
2204 |
static void fill_note(struct memelfnote *note, const char *name, int type, |
2205 |
unsigned int sz, void *data) |
2206 |
{ |
2207 |
unsigned int namesz; |
2208 |
|
2209 |
namesz = strlen(name) + 1;
|
2210 |
note->name = name; |
2211 |
note->namesz = namesz; |
2212 |
note->namesz_rounded = roundup(namesz, sizeof (int32_t));
|
2213 |
note->type = type; |
2214 |
note->datasz = roundup(sz, sizeof (int32_t));;
|
2215 |
note->data = data; |
2216 |
|
2217 |
/*
|
2218 |
* We calculate rounded up note size here as specified by
|
2219 |
* ELF document.
|
2220 |
*/
|
2221 |
note->notesz = sizeof (struct elf_note) + |
2222 |
note->namesz_rounded + note->datasz; |
2223 |
} |
2224 |
|
2225 |
static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine, |
2226 |
uint32_t flags) |
2227 |
{ |
2228 |
(void) memset(elf, 0, sizeof(*elf)); |
2229 |
|
2230 |
(void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
|
2231 |
elf->e_ident[EI_CLASS] = ELF_CLASS; |
2232 |
elf->e_ident[EI_DATA] = ELF_DATA; |
2233 |
elf->e_ident[EI_VERSION] = EV_CURRENT; |
2234 |
elf->e_ident[EI_OSABI] = ELF_OSABI; |
2235 |
|
2236 |
elf->e_type = ET_CORE; |
2237 |
elf->e_machine = machine; |
2238 |
elf->e_version = EV_CURRENT; |
2239 |
elf->e_phoff = sizeof(struct elfhdr); |
2240 |
elf->e_flags = flags; |
2241 |
elf->e_ehsize = sizeof(struct elfhdr); |
2242 |
elf->e_phentsize = sizeof(struct elf_phdr); |
2243 |
elf->e_phnum = segs; |
2244 |
|
2245 |
#ifdef BSWAP_NEEDED
|
2246 |
bswap_ehdr(elf); |
2247 |
#endif
|
2248 |
} |
2249 |
|
2250 |
static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset) |
2251 |
{ |
2252 |
phdr->p_type = PT_NOTE; |
2253 |
phdr->p_offset = offset; |
2254 |
phdr->p_vaddr = 0;
|
2255 |
phdr->p_paddr = 0;
|
2256 |
phdr->p_filesz = sz; |
2257 |
phdr->p_memsz = 0;
|
2258 |
phdr->p_flags = 0;
|
2259 |
phdr->p_align = 0;
|
2260 |
|
2261 |
#ifdef BSWAP_NEEDED
|
2262 |
bswap_phdr(phdr); |
2263 |
#endif
|
2264 |
} |
2265 |
|
2266 |
static size_t note_size(const struct memelfnote *note) |
2267 |
{ |
2268 |
return (note->notesz);
|
2269 |
} |
2270 |
|
2271 |
static void fill_prstatus(struct target_elf_prstatus *prstatus, |
2272 |
const TaskState *ts, int signr) |
2273 |
{ |
2274 |
(void) memset(prstatus, 0, sizeof (*prstatus)); |
2275 |
prstatus->pr_info.si_signo = prstatus->pr_cursig = signr; |
2276 |
prstatus->pr_pid = ts->ts_tid; |
2277 |
prstatus->pr_ppid = getppid(); |
2278 |
prstatus->pr_pgrp = getpgrp(); |
2279 |
prstatus->pr_sid = getsid(0);
|
2280 |
|
2281 |
#ifdef BSWAP_NEEDED
|
2282 |
bswap_prstatus(prstatus); |
2283 |
#endif
|
2284 |
} |
2285 |
|
2286 |
static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts) |
2287 |
{ |
2288 |
char *filename, *base_filename;
|
2289 |
unsigned int i, len; |
2290 |
|
2291 |
(void) memset(psinfo, 0, sizeof (*psinfo)); |
2292 |
|
2293 |
len = ts->info->arg_end - ts->info->arg_start; |
2294 |
if (len >= ELF_PRARGSZ)
|
2295 |
len = ELF_PRARGSZ - 1;
|
2296 |
if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
|
2297 |
return -EFAULT;
|
2298 |
for (i = 0; i < len; i++) |
2299 |
if (psinfo->pr_psargs[i] == 0) |
2300 |
psinfo->pr_psargs[i] = ' ';
|
2301 |
psinfo->pr_psargs[len] = 0;
|
2302 |
|
2303 |
psinfo->pr_pid = getpid(); |
2304 |
psinfo->pr_ppid = getppid(); |
2305 |
psinfo->pr_pgrp = getpgrp(); |
2306 |
psinfo->pr_sid = getsid(0);
|
2307 |
psinfo->pr_uid = getuid(); |
2308 |
psinfo->pr_gid = getgid(); |
2309 |
|
2310 |
filename = strdup(ts->bprm->filename); |
2311 |
base_filename = strdup(basename(filename)); |
2312 |
(void) strncpy(psinfo->pr_fname, base_filename,
|
2313 |
sizeof(psinfo->pr_fname));
|
2314 |
free(base_filename); |
2315 |
free(filename); |
2316 |
|
2317 |
#ifdef BSWAP_NEEDED
|
2318 |
bswap_psinfo(psinfo); |
2319 |
#endif
|
2320 |
return (0); |
2321 |
} |
2322 |
|
2323 |
static void fill_auxv_note(struct memelfnote *note, const TaskState *ts) |
2324 |
{ |
2325 |
elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv; |
2326 |
elf_addr_t orig_auxv = auxv; |
2327 |
abi_ulong val; |
2328 |
void *ptr;
|
2329 |
int i, len;
|
2330 |
|
2331 |
/*
|
2332 |
* Auxiliary vector is stored in target process stack. It contains
|
2333 |
* {type, value} pairs that we need to dump into note. This is not
|
2334 |
* strictly necessary but we do it here for sake of completeness.
|
2335 |
*/
|
2336 |
|
2337 |
/* find out lenght of the vector, AT_NULL is terminator */
|
2338 |
i = len = 0;
|
2339 |
do {
|
2340 |
get_user_ual(val, auxv); |
2341 |
i += 2;
|
2342 |
auxv += 2 * sizeof (elf_addr_t); |
2343 |
} while (val != AT_NULL);
|
2344 |
len = i * sizeof (elf_addr_t);
|
2345 |
|
2346 |
/* read in whole auxv vector and copy it to memelfnote */
|
2347 |
ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
|
2348 |
if (ptr != NULL) { |
2349 |
fill_note(note, "CORE", NT_AUXV, len, ptr);
|
2350 |
unlock_user(ptr, auxv, len); |
2351 |
} |
2352 |
} |
2353 |
|
2354 |
/*
|
2355 |
* Constructs name of coredump file. We have following convention
|
2356 |
* for the name:
|
2357 |
* qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
|
2358 |
*
|
2359 |
* Returns 0 in case of success, -1 otherwise (errno is set).
|
2360 |
*/
|
2361 |
static int core_dump_filename(const TaskState *ts, char *buf, |
2362 |
size_t bufsize) |
2363 |
{ |
2364 |
char timestamp[64]; |
2365 |
char *filename = NULL; |
2366 |
char *base_filename = NULL; |
2367 |
struct timeval tv;
|
2368 |
struct tm tm;
|
2369 |
|
2370 |
assert(bufsize >= PATH_MAX); |
2371 |
|
2372 |
if (gettimeofday(&tv, NULL) < 0) { |
2373 |
(void) fprintf(stderr, "unable to get current timestamp: %s", |
2374 |
strerror(errno)); |
2375 |
return (-1); |
2376 |
} |
2377 |
|
2378 |
filename = strdup(ts->bprm->filename); |
2379 |
base_filename = strdup(basename(filename)); |
2380 |
(void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S", |
2381 |
localtime_r(&tv.tv_sec, &tm)); |
2382 |
(void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core", |
2383 |
base_filename, timestamp, (int)getpid());
|
2384 |
free(base_filename); |
2385 |
free(filename); |
2386 |
|
2387 |
return (0); |
2388 |
} |
2389 |
|
2390 |
static int dump_write(int fd, const void *ptr, size_t size) |
2391 |
{ |
2392 |
const char *bufp = (const char *)ptr; |
2393 |
ssize_t bytes_written, bytes_left; |
2394 |
struct rlimit dumpsize;
|
2395 |
off_t pos; |
2396 |
|
2397 |
bytes_written = 0;
|
2398 |
getrlimit(RLIMIT_CORE, &dumpsize); |
2399 |
if ((pos = lseek(fd, 0, SEEK_CUR))==-1) { |
2400 |
if (errno == ESPIPE) { /* not a seekable stream */ |
2401 |
bytes_left = size; |
2402 |
} else {
|
2403 |
return pos;
|
2404 |
} |
2405 |
} else {
|
2406 |
if (dumpsize.rlim_cur <= pos) {
|
2407 |
return -1; |
2408 |
} else if (dumpsize.rlim_cur == RLIM_INFINITY) { |
2409 |
bytes_left = size; |
2410 |
} else {
|
2411 |
size_t limit_left=dumpsize.rlim_cur - pos; |
2412 |
bytes_left = limit_left >= size ? size : limit_left ; |
2413 |
} |
2414 |
} |
2415 |
|
2416 |
/*
|
2417 |
* In normal conditions, single write(2) should do but
|
2418 |
* in case of socket etc. this mechanism is more portable.
|
2419 |
*/
|
2420 |
do {
|
2421 |
bytes_written = write(fd, bufp, bytes_left); |
2422 |
if (bytes_written < 0) { |
2423 |
if (errno == EINTR)
|
2424 |
continue;
|
2425 |
return (-1); |
2426 |
} else if (bytes_written == 0) { /* eof */ |
2427 |
return (-1); |
2428 |
} |
2429 |
bufp += bytes_written; |
2430 |
bytes_left -= bytes_written; |
2431 |
} while (bytes_left > 0); |
2432 |
|
2433 |
return (0); |
2434 |
} |
2435 |
|
2436 |
static int write_note(struct memelfnote *men, int fd) |
2437 |
{ |
2438 |
struct elf_note en;
|
2439 |
|
2440 |
en.n_namesz = men->namesz; |
2441 |
en.n_type = men->type; |
2442 |
en.n_descsz = men->datasz; |
2443 |
|
2444 |
#ifdef BSWAP_NEEDED
|
2445 |
bswap_note(&en); |
2446 |
#endif
|
2447 |
|
2448 |
if (dump_write(fd, &en, sizeof(en)) != 0) |
2449 |
return (-1); |
2450 |
if (dump_write(fd, men->name, men->namesz_rounded) != 0) |
2451 |
return (-1); |
2452 |
if (dump_write(fd, men->data, men->datasz) != 0) |
2453 |
return (-1); |
2454 |
|
2455 |
return (0); |
2456 |
} |
2457 |
|
2458 |
static void fill_thread_info(struct elf_note_info *info, const CPUState *env) |
2459 |
{ |
2460 |
TaskState *ts = (TaskState *)env->opaque; |
2461 |
struct elf_thread_status *ets;
|
2462 |
|
2463 |
ets = qemu_mallocz(sizeof (*ets));
|
2464 |
ets->num_notes = 1; /* only prstatus is dumped */ |
2465 |
fill_prstatus(&ets->prstatus, ts, 0);
|
2466 |
elf_core_copy_regs(&ets->prstatus.pr_reg, env); |
2467 |
fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus), |
2468 |
&ets->prstatus); |
2469 |
|
2470 |
QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link); |
2471 |
|
2472 |
info->notes_size += note_size(&ets->notes[0]);
|
2473 |
} |
2474 |
|
2475 |
static int fill_note_info(struct elf_note_info *info, |
2476 |
long signr, const CPUState *env) |
2477 |
{ |
2478 |
#define NUMNOTES 3 |
2479 |
CPUState *cpu = NULL;
|
2480 |
TaskState *ts = (TaskState *)env->opaque; |
2481 |
int i;
|
2482 |
|
2483 |
(void) memset(info, 0, sizeof (*info)); |
2484 |
|
2485 |
QTAILQ_INIT(&info->thread_list); |
2486 |
|
2487 |
info->notes = qemu_mallocz(NUMNOTES * sizeof (struct memelfnote)); |
2488 |
if (info->notes == NULL) |
2489 |
return (-ENOMEM);
|
2490 |
info->prstatus = qemu_mallocz(sizeof (*info->prstatus));
|
2491 |
if (info->prstatus == NULL) |
2492 |
return (-ENOMEM);
|
2493 |
info->psinfo = qemu_mallocz(sizeof (*info->psinfo));
|
2494 |
if (info->prstatus == NULL) |
2495 |
return (-ENOMEM);
|
2496 |
|
2497 |
/*
|
2498 |
* First fill in status (and registers) of current thread
|
2499 |
* including process info & aux vector.
|
2500 |
*/
|
2501 |
fill_prstatus(info->prstatus, ts, signr); |
2502 |
elf_core_copy_regs(&info->prstatus->pr_reg, env); |
2503 |
fill_note(&info->notes[0], "CORE", NT_PRSTATUS, |
2504 |
sizeof (*info->prstatus), info->prstatus);
|
2505 |
fill_psinfo(info->psinfo, ts); |
2506 |
fill_note(&info->notes[1], "CORE", NT_PRPSINFO, |
2507 |
sizeof (*info->psinfo), info->psinfo);
|
2508 |
fill_auxv_note(&info->notes[2], ts);
|
2509 |
info->numnote = 3;
|
2510 |
|
2511 |
info->notes_size = 0;
|
2512 |
for (i = 0; i < info->numnote; i++) |
2513 |
info->notes_size += note_size(&info->notes[i]); |
2514 |
|
2515 |
/* read and fill status of all threads */
|
2516 |
cpu_list_lock(); |
2517 |
for (cpu = first_cpu; cpu != NULL; cpu = cpu->next_cpu) { |
2518 |
if (cpu == thread_env)
|
2519 |
continue;
|
2520 |
fill_thread_info(info, cpu); |
2521 |
} |
2522 |
cpu_list_unlock(); |
2523 |
|
2524 |
return (0); |
2525 |
} |
2526 |
|
2527 |
static void free_note_info(struct elf_note_info *info) |
2528 |
{ |
2529 |
struct elf_thread_status *ets;
|
2530 |
|
2531 |
while (!QTAILQ_EMPTY(&info->thread_list)) {
|
2532 |
ets = QTAILQ_FIRST(&info->thread_list); |
2533 |
QTAILQ_REMOVE(&info->thread_list, ets, ets_link); |
2534 |
qemu_free(ets); |
2535 |
} |
2536 |
|
2537 |
qemu_free(info->prstatus); |
2538 |
qemu_free(info->psinfo); |
2539 |
qemu_free(info->notes); |
2540 |
} |
2541 |
|
2542 |
static int write_note_info(struct elf_note_info *info, int fd) |
2543 |
{ |
2544 |
struct elf_thread_status *ets;
|
2545 |
int i, error = 0; |
2546 |
|
2547 |
/* write prstatus, psinfo and auxv for current thread */
|
2548 |
for (i = 0; i < info->numnote; i++) |
2549 |
if ((error = write_note(&info->notes[i], fd)) != 0) |
2550 |
return (error);
|
2551 |
|
2552 |
/* write prstatus for each thread */
|
2553 |
for (ets = info->thread_list.tqh_first; ets != NULL; |
2554 |
ets = ets->ets_link.tqe_next) { |
2555 |
if ((error = write_note(&ets->notes[0], fd)) != 0) |
2556 |
return (error);
|
2557 |
} |
2558 |
|
2559 |
return (0); |
2560 |
} |
2561 |
|
2562 |
/*
|
2563 |
* Write out ELF coredump.
|
2564 |
*
|
2565 |
* See documentation of ELF object file format in:
|
2566 |
* http://www.caldera.com/developers/devspecs/gabi41.pdf
|
2567 |
*
|
2568 |
* Coredump format in linux is following:
|
2569 |
*
|
2570 |
* 0 +----------------------+ \
|
2571 |
* | ELF header | ET_CORE |
|
2572 |
* +----------------------+ |
|
2573 |
* | ELF program headers | |--- headers
|
2574 |
* | - NOTE section | |
|
2575 |
* | - PT_LOAD sections | |
|
2576 |
* +----------------------+ /
|
2577 |
* | NOTEs: |
|
2578 |
* | - NT_PRSTATUS |
|
2579 |
* | - NT_PRSINFO |
|
2580 |
* | - NT_AUXV |
|
2581 |
* +----------------------+ <-- aligned to target page
|
2582 |
* | Process memory dump |
|
2583 |
* : :
|
2584 |
* . .
|
2585 |
* : :
|
2586 |
* | |
|
2587 |
* +----------------------+
|
2588 |
*
|
2589 |
* NT_PRSTATUS -> struct elf_prstatus (per thread)
|
2590 |
* NT_PRSINFO -> struct elf_prpsinfo
|
2591 |
* NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
|
2592 |
*
|
2593 |
* Format follows System V format as close as possible. Current
|
2594 |
* version limitations are as follows:
|
2595 |
* - no floating point registers are dumped
|
2596 |
*
|
2597 |
* Function returns 0 in case of success, negative errno otherwise.
|
2598 |
*
|
2599 |
* TODO: make this work also during runtime: it should be
|
2600 |
* possible to force coredump from running process and then
|
2601 |
* continue processing. For example qemu could set up SIGUSR2
|
2602 |
* handler (provided that target process haven't registered
|
2603 |
* handler for that) that does the dump when signal is received.
|
2604 |
*/
|
2605 |
static int elf_core_dump(int signr, const CPUState *env) |
2606 |
{ |
2607 |
const TaskState *ts = (const TaskState *)env->opaque; |
2608 |
struct vm_area_struct *vma = NULL; |
2609 |
char corefile[PATH_MAX];
|
2610 |
struct elf_note_info info;
|
2611 |
struct elfhdr elf;
|
2612 |
struct elf_phdr phdr;
|
2613 |
struct rlimit dumpsize;
|
2614 |
struct mm_struct *mm = NULL; |
2615 |
off_t offset = 0, data_offset = 0; |
2616 |
int segs = 0; |
2617 |
int fd = -1; |
2618 |
|
2619 |
errno = 0;
|
2620 |
getrlimit(RLIMIT_CORE, &dumpsize); |
2621 |
if (dumpsize.rlim_cur == 0) |
2622 |
return 0; |
2623 |
|
2624 |
if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0) |
2625 |
return (-errno);
|
2626 |
|
2627 |
if ((fd = open(corefile, O_WRONLY | O_CREAT,
|
2628 |
S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
|
2629 |
return (-errno);
|
2630 |
|
2631 |
/*
|
2632 |
* Walk through target process memory mappings and
|
2633 |
* set up structure containing this information. After
|
2634 |
* this point vma_xxx functions can be used.
|
2635 |
*/
|
2636 |
if ((mm = vma_init()) == NULL) |
2637 |
goto out;
|
2638 |
|
2639 |
walk_memory_regions(mm, vma_walker); |
2640 |
segs = vma_get_mapping_count(mm); |
2641 |
|
2642 |
/*
|
2643 |
* Construct valid coredump ELF header. We also
|
2644 |
* add one more segment for notes.
|
2645 |
*/
|
2646 |
fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0); |
2647 |
if (dump_write(fd, &elf, sizeof (elf)) != 0) |
2648 |
goto out;
|
2649 |
|
2650 |
/* fill in in-memory version of notes */
|
2651 |
if (fill_note_info(&info, signr, env) < 0) |
2652 |
goto out;
|
2653 |
|
2654 |
offset += sizeof (elf); /* elf header */ |
2655 |
offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */ |
2656 |
|
2657 |
/* write out notes program header */
|
2658 |
fill_elf_note_phdr(&phdr, info.notes_size, offset); |
2659 |
|
2660 |
offset += info.notes_size; |
2661 |
if (dump_write(fd, &phdr, sizeof (phdr)) != 0) |
2662 |
goto out;
|
2663 |
|
2664 |
/*
|
2665 |
* ELF specification wants data to start at page boundary so
|
2666 |
* we align it here.
|
2667 |
*/
|
2668 |
offset = roundup(offset, ELF_EXEC_PAGESIZE); |
2669 |
|
2670 |
/*
|
2671 |
* Write program headers for memory regions mapped in
|
2672 |
* the target process.
|
2673 |
*/
|
2674 |
for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) { |
2675 |
(void) memset(&phdr, 0, sizeof (phdr)); |
2676 |
|
2677 |
phdr.p_type = PT_LOAD; |
2678 |
phdr.p_offset = offset; |
2679 |
phdr.p_vaddr = vma->vma_start; |
2680 |
phdr.p_paddr = 0;
|
2681 |
phdr.p_filesz = vma_dump_size(vma); |
2682 |
offset += phdr.p_filesz; |
2683 |
phdr.p_memsz = vma->vma_end - vma->vma_start; |
2684 |
phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
|
2685 |
if (vma->vma_flags & PROT_WRITE)
|
2686 |
phdr.p_flags |= PF_W; |
2687 |
if (vma->vma_flags & PROT_EXEC)
|
2688 |
phdr.p_flags |= PF_X; |
2689 |
phdr.p_align = ELF_EXEC_PAGESIZE; |
2690 |
|
2691 |
dump_write(fd, &phdr, sizeof (phdr));
|
2692 |
} |
2693 |
|
2694 |
/*
|
2695 |
* Next we write notes just after program headers. No
|
2696 |
* alignment needed here.
|
2697 |
*/
|
2698 |
if (write_note_info(&info, fd) < 0) |
2699 |
goto out;
|
2700 |
|
2701 |
/* align data to page boundary */
|
2702 |
data_offset = lseek(fd, 0, SEEK_CUR);
|
2703 |
data_offset = TARGET_PAGE_ALIGN(data_offset); |
2704 |
if (lseek(fd, data_offset, SEEK_SET) != data_offset)
|
2705 |
goto out;
|
2706 |
|
2707 |
/*
|
2708 |
* Finally we can dump process memory into corefile as well.
|
2709 |
*/
|
2710 |
for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) { |
2711 |
abi_ulong addr; |
2712 |
abi_ulong end; |
2713 |
|
2714 |
end = vma->vma_start + vma_dump_size(vma); |
2715 |
|
2716 |
for (addr = vma->vma_start; addr < end;
|
2717 |
addr += TARGET_PAGE_SIZE) { |
2718 |
char page[TARGET_PAGE_SIZE];
|
2719 |
int error;
|
2720 |
|
2721 |
/*
|
2722 |
* Read in page from target process memory and
|
2723 |
* write it to coredump file.
|
2724 |
*/
|
2725 |
error = copy_from_user(page, addr, sizeof (page));
|
2726 |
if (error != 0) { |
2727 |
(void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n", |
2728 |
addr); |
2729 |
errno = -error; |
2730 |
goto out;
|
2731 |
} |
2732 |
if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0) |
2733 |
goto out;
|
2734 |
} |
2735 |
} |
2736 |
|
2737 |
out:
|
2738 |
free_note_info(&info); |
2739 |
if (mm != NULL) |
2740 |
vma_delete(mm); |
2741 |
(void) close(fd);
|
2742 |
|
2743 |
if (errno != 0) |
2744 |
return (-errno);
|
2745 |
return (0); |
2746 |
} |
2747 |
|
2748 |
#endif /* USE_ELF_CORE_DUMP */ |
2749 |
|
2750 |
static int load_aout_interp(void * exptr, int interp_fd) |
2751 |
{ |
2752 |
printf("a.out interpreter not yet supported\n");
|
2753 |
return(0); |
2754 |
} |
2755 |
|
2756 |
void do_init_thread(struct target_pt_regs *regs, struct image_info *infop) |
2757 |
{ |
2758 |
init_thread(regs, infop); |
2759 |
} |