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/* This is the Linux kernel elf-loading code, ported into user space */
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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 <stdlib.h> |
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#include <string.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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/* from personality.h */
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/*
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* Flags for bug emulation.
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*
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* These occupy the top three bytes.
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*/
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enum {
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ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */ |
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FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors |
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* (signal handling)
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*/
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MMAP_PAGE_ZERO = 0x0100000,
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ADDR_COMPAT_LAYOUT = 0x0200000,
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READ_IMPLIES_EXEC = 0x0400000,
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ADDR_LIMIT_32BIT = 0x0800000,
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SHORT_INODE = 0x1000000,
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WHOLE_SECONDS = 0x2000000,
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STICKY_TIMEOUTS = 0x4000000,
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ADDR_LIMIT_3GB = 0x8000000,
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}; |
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/*
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* Personality types.
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*
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* These go in the low byte. Avoid using the top bit, it will
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* conflict with error returns.
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*/
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enum {
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PER_LINUX = 0x0000,
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PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
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PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
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PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
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PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
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PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS |
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WHOLE_SECONDS | SHORT_INODE, |
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PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
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PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
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PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
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PER_BSD = 0x0006,
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PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
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PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
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PER_LINUX32 = 0x0008,
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PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
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PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */ |
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PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */ |
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PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */ |
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PER_RISCOS = 0x000c,
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PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
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PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
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PER_OSF4 = 0x000f, /* OSF/1 v4 */ |
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PER_HPUX = 0x0010,
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PER_MASK = 0x00ff,
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}; |
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/*
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* Return the base personality without flags.
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*/
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#define personality(pers) (pers & PER_MASK)
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/* this flag is uneffective under linux too, should be deleted */
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#ifndef MAP_DENYWRITE
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#define MAP_DENYWRITE 0 |
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#endif
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/* should probably go in elf.h */
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#ifndef ELIBBAD
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#define ELIBBAD 80 |
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#endif
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#ifdef TARGET_I386
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#define ELF_PLATFORM get_elf_platform()
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static const char *get_elf_platform(void) |
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{ |
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static char elf_platform[] = "i386"; |
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int family = (thread_env->cpuid_version >> 8) & 0xff; |
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if (family > 6) |
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family = 6;
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if (family >= 3) |
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elf_platform[1] = '0' + family; |
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return elf_platform;
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} |
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#define ELF_HWCAP get_elf_hwcap()
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static uint32_t get_elf_hwcap(void) |
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{ |
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return thread_env->cpuid_features;
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} |
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#ifdef TARGET_X86_64
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#define ELF_START_MMAP 0x2aaaaab000ULL |
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#define elf_check_arch(x) ( ((x) == ELF_ARCH) )
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#define ELF_CLASS ELFCLASS64
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#define ELF_DATA ELFDATA2LSB
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#define ELF_ARCH EM_X86_64
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static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
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{ |
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regs->rax = 0;
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regs->rsp = infop->start_stack; |
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regs->rip = infop->entry; |
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if (bsd_type == target_freebsd) {
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regs->rdi = infop->start_stack; |
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} |
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} |
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#else
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#define ELF_START_MMAP 0x80000000 |
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/*
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* 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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#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 USE_ELF_CORE_DUMP
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#define ELF_EXEC_PAGESIZE 4096 |
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enum
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{ |
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ARM_HWCAP_ARM_SWP = 1 << 0, |
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ARM_HWCAP_ARM_HALF = 1 << 1, |
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ARM_HWCAP_ARM_THUMB = 1 << 2, |
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ARM_HWCAP_ARM_26BIT = 1 << 3, |
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ARM_HWCAP_ARM_FAST_MULT = 1 << 4, |
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ARM_HWCAP_ARM_FPA = 1 << 5, |
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ARM_HWCAP_ARM_VFP = 1 << 6, |
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ARM_HWCAP_ARM_EDSP = 1 << 7, |
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}; |
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#define ELF_HWCAP (ARM_HWCAP_ARM_SWP | ARM_HWCAP_ARM_HALF \
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| ARM_HWCAP_ARM_THUMB | ARM_HWCAP_ARM_FAST_MULT \ |
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| ARM_HWCAP_ARM_FPA | ARM_HWCAP_ARM_VFP) |
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#endif
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#ifdef TARGET_SPARC
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#ifdef TARGET_SPARC64
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#define ELF_START_MMAP 0x80000000 |
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#ifndef TARGET_ABI32
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#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
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#else
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#define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
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#endif
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#define ELF_CLASS ELFCLASS64
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#define ELF_DATA ELFDATA2MSB
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#define ELF_ARCH EM_SPARCV9
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#define STACK_BIAS 2047 |
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static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
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{ |
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#ifndef TARGET_ABI32
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regs->tstate = 0;
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#endif
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regs->pc = infop->entry; |
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regs->npc = regs->pc + 4;
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regs->y = 0;
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#ifdef TARGET_ABI32
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regs->u_regs[14] = infop->start_stack - 16 * 4; |
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#else
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if (personality(infop->personality) == PER_LINUX32)
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regs->u_regs[14] = infop->start_stack - 16 * 4; |
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else {
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regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS; |
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if (bsd_type == target_freebsd) {
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regs->u_regs[8] = infop->start_stack;
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regs->u_regs[11] = infop->start_stack;
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} |
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} |
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#endif
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} |
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#else
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#define ELF_START_MMAP 0x80000000 |
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#define elf_check_arch(x) ( (x) == EM_SPARC )
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#define ELF_CLASS ELFCLASS32
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#define ELF_DATA ELFDATA2MSB
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#define ELF_ARCH EM_SPARC
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static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
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{ |
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regs->psr = 0;
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regs->pc = infop->entry; |
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regs->npc = regs->pc + 4;
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regs->y = 0;
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regs->u_regs[14] = infop->start_stack - 16 * 4; |
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} |
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#endif
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#endif
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#ifdef TARGET_PPC
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#define ELF_START_MMAP 0x80000000 |
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#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
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#define elf_check_arch(x) ( (x) == EM_PPC64 )
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#define ELF_CLASS ELFCLASS64
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#else
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#define elf_check_arch(x) ( (x) == EM_PPC )
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#define ELF_CLASS ELFCLASS32
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#endif
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#ifdef TARGET_WORDS_BIGENDIAN
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#define ELF_DATA ELFDATA2MSB
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#else
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#define ELF_DATA ELFDATA2LSB
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#endif
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#define ELF_ARCH EM_PPC
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/*
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* We need to put in some extra aux table entries to tell glibc what
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* the cache block size is, so it can use the dcbz instruction safely.
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*/
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#define AT_DCACHEBSIZE 19 |
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#define AT_ICACHEBSIZE 20 |
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#define AT_UCACHEBSIZE 21 |
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/* A special ignored type value for PPC, for glibc compatibility. */
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#define AT_IGNOREPPC 22 |
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/*
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* The requirements here are:
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* - keep the final alignment of sp (sp & 0xf)
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* - make sure the 32-bit value at the first 16 byte aligned position of
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* AUXV is greater than 16 for glibc compatibility.
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* AT_IGNOREPPC is used for that.
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* - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
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* even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
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*/
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#define DLINFO_ARCH_ITEMS 5 |
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#define ARCH_DLINFO \
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do { \
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NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
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NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
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NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
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/* \
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* Now handle glibc compatibility. \
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*/ \
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NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
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NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ |
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} while (0) |
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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_ulong pos = infop->start_stack; |
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abi_ulong tmp; |
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#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
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abi_ulong entry, toc; |
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#endif
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_regs->gpr[1] = infop->start_stack;
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#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
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entry = ldq_raw(infop->entry) + infop->load_addr; |
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toc = ldq_raw(infop->entry + 8) + infop->load_addr;
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_regs->gpr[2] = toc;
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infop->entry = entry; |
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#endif
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_regs->nip = infop->entry; |
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/* Note that isn't exactly what regular kernel does
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* but this is what the ABI wants and is needed to allow
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* execution of PPC BSD programs.
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*/
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/* FIXME - what to for failure of get_user()? */
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get_user_ual(_regs->gpr[3], pos);
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pos += sizeof(abi_ulong);
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_regs->gpr[4] = pos;
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for (tmp = 1; tmp != 0; pos += sizeof(abi_ulong)) |
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tmp = ldl(pos); |
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_regs->gpr[5] = pos;
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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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#endif
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#ifdef TARGET_MIPS
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#define ELF_START_MMAP 0x80000000 |
379 |
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#define elf_check_arch(x) ( (x) == EM_MIPS )
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#ifdef TARGET_MIPS64
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#define ELF_CLASS ELFCLASS64
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#else
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#define ELF_CLASS ELFCLASS32
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#endif
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#ifdef TARGET_WORDS_BIGENDIAN
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#define ELF_DATA ELFDATA2MSB
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#else
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#define ELF_DATA ELFDATA2LSB
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#endif
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#define ELF_ARCH EM_MIPS
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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->cp0_status = 2 << CP0St_KSU;
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regs->cp0_epc = infop->entry; |
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regs->regs[29] = infop->start_stack;
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} |
400 |
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#define USE_ELF_CORE_DUMP
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#define ELF_EXEC_PAGESIZE 4096 |
403 |
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#endif /* TARGET_MIPS */ |
405 |
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#ifdef TARGET_SH4
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#define ELF_START_MMAP 0x80000000 |
409 |
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#define elf_check_arch(x) ( (x) == EM_SH )
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411 |
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#define ELF_CLASS ELFCLASS32
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#define ELF_DATA ELFDATA2LSB
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#define ELF_ARCH EM_SH
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static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
417 |
{ |
418 |
/* Check other registers XXXXX */
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regs->pc = infop->entry; |
420 |
regs->regs[15] = infop->start_stack;
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} |
422 |
|
423 |
#define USE_ELF_CORE_DUMP
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#define ELF_EXEC_PAGESIZE 4096 |
425 |
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#endif
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427 |
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428 |
#ifdef TARGET_CRIS
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429 |
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430 |
#define ELF_START_MMAP 0x80000000 |
431 |
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#define elf_check_arch(x) ( (x) == EM_CRIS )
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433 |
|
434 |
#define ELF_CLASS ELFCLASS32
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#define ELF_DATA ELFDATA2LSB
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#define ELF_ARCH EM_CRIS
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|
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static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
439 |
{ |
440 |
regs->erp = infop->entry; |
441 |
} |
442 |
|
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#define USE_ELF_CORE_DUMP
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#define ELF_EXEC_PAGESIZE 8192 |
445 |
|
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#endif
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447 |
|
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#ifdef TARGET_M68K
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|
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#define ELF_START_MMAP 0x80000000 |
451 |
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#define elf_check_arch(x) ( (x) == EM_68K )
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#define ELF_CLASS ELFCLASS32
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#define ELF_DATA ELFDATA2MSB
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#define ELF_ARCH EM_68K
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/* ??? Does this need to do anything?
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#define ELF_PLAT_INIT(_r) */
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|
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static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
462 |
{ |
463 |
regs->usp = infop->start_stack; |
464 |
regs->sr = 0;
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regs->pc = infop->entry; |
466 |
} |
467 |
|
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#define USE_ELF_CORE_DUMP
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#define ELF_EXEC_PAGESIZE 8192 |
470 |
|
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#endif
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472 |
|
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#ifdef TARGET_ALPHA
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|
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#define ELF_START_MMAP (0x30000000000ULL) |
476 |
|
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#define elf_check_arch(x) ( (x) == ELF_ARCH )
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478 |
|
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#define ELF_CLASS ELFCLASS64
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#define ELF_DATA ELFDATA2MSB
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#define ELF_ARCH EM_ALPHA
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482 |
|
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static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) |
484 |
{ |
485 |
regs->pc = infop->entry; |
486 |
regs->ps = 8;
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regs->usp = infop->start_stack; |
488 |
regs->unique = infop->start_data; /* ? */
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printf("Set unique value to " TARGET_FMT_lx " (" TARGET_FMT_lx ")\n", |
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regs->unique, infop->start_data); |
491 |
} |
492 |
|
493 |
#define USE_ELF_CORE_DUMP
|
494 |
#define ELF_EXEC_PAGESIZE 8192 |
495 |
|
496 |
#endif /* TARGET_ALPHA */ |
497 |
|
498 |
#ifndef ELF_PLATFORM
|
499 |
#define ELF_PLATFORM (NULL) |
500 |
#endif
|
501 |
|
502 |
#ifndef ELF_HWCAP
|
503 |
#define ELF_HWCAP 0 |
504 |
#endif
|
505 |
|
506 |
#ifdef TARGET_ABI32
|
507 |
#undef ELF_CLASS
|
508 |
#define ELF_CLASS ELFCLASS32
|
509 |
#undef bswaptls
|
510 |
#define bswaptls(ptr) bswap32s(ptr)
|
511 |
#endif
|
512 |
|
513 |
#include "elf.h" |
514 |
|
515 |
struct exec
|
516 |
{ |
517 |
unsigned int a_info; /* Use macros N_MAGIC, etc for access */ |
518 |
unsigned int a_text; /* length of text, in bytes */ |
519 |
unsigned int a_data; /* length of data, in bytes */ |
520 |
unsigned int a_bss; /* length of uninitialized data area, in bytes */ |
521 |
unsigned int a_syms; /* length of symbol table data in file, in bytes */ |
522 |
unsigned int a_entry; /* start address */ |
523 |
unsigned int a_trsize; /* length of relocation info for text, in bytes */ |
524 |
unsigned int a_drsize; /* length of relocation info for data, in bytes */ |
525 |
}; |
526 |
|
527 |
|
528 |
#define N_MAGIC(exec) ((exec).a_info & 0xffff) |
529 |
#define OMAGIC 0407 |
530 |
#define NMAGIC 0410 |
531 |
#define ZMAGIC 0413 |
532 |
#define QMAGIC 0314 |
533 |
|
534 |
/* max code+data+bss space allocated to elf interpreter */
|
535 |
#define INTERP_MAP_SIZE (32 * 1024 * 1024) |
536 |
|
537 |
/* max code+data+bss+brk space allocated to ET_DYN executables */
|
538 |
#define ET_DYN_MAP_SIZE (128 * 1024 * 1024) |
539 |
|
540 |
/* Necessary parameters */
|
541 |
#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
|
542 |
#define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1)) |
543 |
#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1)) |
544 |
|
545 |
#define INTERPRETER_NONE 0 |
546 |
#define INTERPRETER_AOUT 1 |
547 |
#define INTERPRETER_ELF 2 |
548 |
|
549 |
#define DLINFO_ITEMS 12 |
550 |
|
551 |
static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) |
552 |
{ |
553 |
memcpy(to, from, n); |
554 |
} |
555 |
|
556 |
static int load_aout_interp(void * exptr, int interp_fd); |
557 |
|
558 |
#ifdef BSWAP_NEEDED
|
559 |
static void bswap_ehdr(struct elfhdr *ehdr) |
560 |
{ |
561 |
bswap16s(&ehdr->e_type); /* Object file type */
|
562 |
bswap16s(&ehdr->e_machine); /* Architecture */
|
563 |
bswap32s(&ehdr->e_version); /* Object file version */
|
564 |
bswaptls(&ehdr->e_entry); /* Entry point virtual address */
|
565 |
bswaptls(&ehdr->e_phoff); /* Program header table file offset */
|
566 |
bswaptls(&ehdr->e_shoff); /* Section header table file offset */
|
567 |
bswap32s(&ehdr->e_flags); /* Processor-specific flags */
|
568 |
bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
|
569 |
bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
|
570 |
bswap16s(&ehdr->e_phnum); /* Program header table entry count */
|
571 |
bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
|
572 |
bswap16s(&ehdr->e_shnum); /* Section header table entry count */
|
573 |
bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
|
574 |
} |
575 |
|
576 |
static void bswap_phdr(struct elf_phdr *phdr) |
577 |
{ |
578 |
bswap32s(&phdr->p_type); /* Segment type */
|
579 |
bswaptls(&phdr->p_offset); /* Segment file offset */
|
580 |
bswaptls(&phdr->p_vaddr); /* Segment virtual address */
|
581 |
bswaptls(&phdr->p_paddr); /* Segment physical address */
|
582 |
bswaptls(&phdr->p_filesz); /* Segment size in file */
|
583 |
bswaptls(&phdr->p_memsz); /* Segment size in memory */
|
584 |
bswap32s(&phdr->p_flags); /* Segment flags */
|
585 |
bswaptls(&phdr->p_align); /* Segment alignment */
|
586 |
} |
587 |
|
588 |
static void bswap_shdr(struct elf_shdr *shdr) |
589 |
{ |
590 |
bswap32s(&shdr->sh_name); |
591 |
bswap32s(&shdr->sh_type); |
592 |
bswaptls(&shdr->sh_flags); |
593 |
bswaptls(&shdr->sh_addr); |
594 |
bswaptls(&shdr->sh_offset); |
595 |
bswaptls(&shdr->sh_size); |
596 |
bswap32s(&shdr->sh_link); |
597 |
bswap32s(&shdr->sh_info); |
598 |
bswaptls(&shdr->sh_addralign); |
599 |
bswaptls(&shdr->sh_entsize); |
600 |
} |
601 |
|
602 |
static void bswap_sym(struct elf_sym *sym) |
603 |
{ |
604 |
bswap32s(&sym->st_name); |
605 |
bswaptls(&sym->st_value); |
606 |
bswaptls(&sym->st_size); |
607 |
bswap16s(&sym->st_shndx); |
608 |
} |
609 |
#endif
|
610 |
|
611 |
/*
|
612 |
* 'copy_elf_strings()' copies argument/envelope strings from user
|
613 |
* memory to free pages in kernel mem. These are in a format ready
|
614 |
* to be put directly into the top of new user memory.
|
615 |
*
|
616 |
*/
|
617 |
static abi_ulong copy_elf_strings(int argc,char ** argv, void **page, |
618 |
abi_ulong p) |
619 |
{ |
620 |
char *tmp, *tmp1, *pag = NULL; |
621 |
int len, offset = 0; |
622 |
|
623 |
if (!p) {
|
624 |
return 0; /* bullet-proofing */ |
625 |
} |
626 |
while (argc-- > 0) { |
627 |
tmp = argv[argc]; |
628 |
if (!tmp) {
|
629 |
fprintf(stderr, "VFS: argc is wrong");
|
630 |
exit(-1);
|
631 |
} |
632 |
tmp1 = tmp; |
633 |
while (*tmp++);
|
634 |
len = tmp - tmp1; |
635 |
if (p < len) { /* this shouldn't happen - 128kB */ |
636 |
return 0; |
637 |
} |
638 |
while (len) {
|
639 |
--p; --tmp; --len; |
640 |
if (--offset < 0) { |
641 |
offset = p % TARGET_PAGE_SIZE; |
642 |
pag = (char *)page[p/TARGET_PAGE_SIZE];
|
643 |
if (!pag) {
|
644 |
pag = (char *)malloc(TARGET_PAGE_SIZE);
|
645 |
memset(pag, 0, TARGET_PAGE_SIZE);
|
646 |
page[p/TARGET_PAGE_SIZE] = pag; |
647 |
if (!pag)
|
648 |
return 0; |
649 |
} |
650 |
} |
651 |
if (len == 0 || offset == 0) { |
652 |
*(pag + offset) = *tmp; |
653 |
} |
654 |
else {
|
655 |
int bytes_to_copy = (len > offset) ? offset : len;
|
656 |
tmp -= bytes_to_copy; |
657 |
p -= bytes_to_copy; |
658 |
offset -= bytes_to_copy; |
659 |
len -= bytes_to_copy; |
660 |
memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
|
661 |
} |
662 |
} |
663 |
} |
664 |
return p;
|
665 |
} |
666 |
|
667 |
static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm, |
668 |
struct image_info *info)
|
669 |
{ |
670 |
abi_ulong stack_base, size, error; |
671 |
int i;
|
672 |
|
673 |
/* Create enough stack to hold everything. If we don't use
|
674 |
* it for args, we'll use it for something else...
|
675 |
*/
|
676 |
size = x86_stack_size; |
677 |
if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE)
|
678 |
size = MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
679 |
error = target_mmap(0,
|
680 |
size + qemu_host_page_size, |
681 |
PROT_READ | PROT_WRITE, |
682 |
MAP_PRIVATE | MAP_ANON, |
683 |
-1, 0); |
684 |
if (error == -1) { |
685 |
perror("stk mmap");
|
686 |
exit(-1);
|
687 |
} |
688 |
/* we reserve one extra page at the top of the stack as guard */
|
689 |
target_mprotect(error + size, qemu_host_page_size, PROT_NONE); |
690 |
|
691 |
stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE; |
692 |
p += stack_base; |
693 |
|
694 |
for (i = 0 ; i < MAX_ARG_PAGES ; i++) { |
695 |
if (bprm->page[i]) {
|
696 |
info->rss++; |
697 |
/* FIXME - check return value of memcpy_to_target() for failure */
|
698 |
memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE); |
699 |
free(bprm->page[i]); |
700 |
} |
701 |
stack_base += TARGET_PAGE_SIZE; |
702 |
} |
703 |
return p;
|
704 |
} |
705 |
|
706 |
static void set_brk(abi_ulong start, abi_ulong end) |
707 |
{ |
708 |
/* page-align the start and end addresses... */
|
709 |
start = HOST_PAGE_ALIGN(start); |
710 |
end = HOST_PAGE_ALIGN(end); |
711 |
if (end <= start)
|
712 |
return;
|
713 |
if(target_mmap(start, end - start,
|
714 |
PROT_READ | PROT_WRITE | PROT_EXEC, |
715 |
MAP_FIXED | MAP_PRIVATE | MAP_ANON, -1, 0) == -1) { |
716 |
perror("cannot mmap brk");
|
717 |
exit(-1);
|
718 |
} |
719 |
} |
720 |
|
721 |
|
722 |
/* We need to explicitly zero any fractional pages after the data
|
723 |
section (i.e. bss). This would contain the junk from the file that
|
724 |
should not be in memory. */
|
725 |
static void padzero(abi_ulong elf_bss, abi_ulong last_bss) |
726 |
{ |
727 |
abi_ulong nbyte; |
728 |
|
729 |
if (elf_bss >= last_bss)
|
730 |
return;
|
731 |
|
732 |
/* XXX: this is really a hack : if the real host page size is
|
733 |
smaller than the target page size, some pages after the end
|
734 |
of the file may not be mapped. A better fix would be to
|
735 |
patch target_mmap(), but it is more complicated as the file
|
736 |
size must be known */
|
737 |
if (qemu_real_host_page_size < qemu_host_page_size) {
|
738 |
abi_ulong end_addr, end_addr1; |
739 |
end_addr1 = (elf_bss + qemu_real_host_page_size - 1) &
|
740 |
~(qemu_real_host_page_size - 1);
|
741 |
end_addr = HOST_PAGE_ALIGN(elf_bss); |
742 |
if (end_addr1 < end_addr) {
|
743 |
mmap((void *)g2h(end_addr1), end_addr - end_addr1,
|
744 |
PROT_READ|PROT_WRITE|PROT_EXEC, |
745 |
MAP_FIXED|MAP_PRIVATE|MAP_ANON, -1, 0); |
746 |
} |
747 |
} |
748 |
|
749 |
nbyte = elf_bss & (qemu_host_page_size-1);
|
750 |
if (nbyte) {
|
751 |
nbyte = qemu_host_page_size - nbyte; |
752 |
do {
|
753 |
/* FIXME - what to do if put_user() fails? */
|
754 |
put_user_u8(0, elf_bss);
|
755 |
elf_bss++; |
756 |
} while (--nbyte);
|
757 |
} |
758 |
} |
759 |
|
760 |
|
761 |
static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, |
762 |
struct elfhdr * exec,
|
763 |
abi_ulong load_addr, |
764 |
abi_ulong load_bias, |
765 |
abi_ulong interp_load_addr, int ibcs,
|
766 |
struct image_info *info)
|
767 |
{ |
768 |
abi_ulong sp; |
769 |
int size;
|
770 |
abi_ulong u_platform; |
771 |
const char *k_platform; |
772 |
const int n = sizeof(elf_addr_t); |
773 |
|
774 |
sp = p; |
775 |
u_platform = 0;
|
776 |
k_platform = ELF_PLATFORM; |
777 |
if (k_platform) {
|
778 |
size_t len = strlen(k_platform) + 1;
|
779 |
sp -= (len + n - 1) & ~(n - 1); |
780 |
u_platform = sp; |
781 |
/* FIXME - check return value of memcpy_to_target() for failure */
|
782 |
memcpy_to_target(sp, k_platform, len); |
783 |
} |
784 |
/*
|
785 |
* Force 16 byte _final_ alignment here for generality.
|
786 |
*/
|
787 |
sp = sp &~ (abi_ulong)15;
|
788 |
size = (DLINFO_ITEMS + 1) * 2; |
789 |
if (k_platform)
|
790 |
size += 2;
|
791 |
#ifdef DLINFO_ARCH_ITEMS
|
792 |
size += DLINFO_ARCH_ITEMS * 2;
|
793 |
#endif
|
794 |
size += envc + argc + 2;
|
795 |
size += (!ibcs ? 3 : 1); /* argc itself */ |
796 |
size *= n; |
797 |
if (size & 15) |
798 |
sp -= 16 - (size & 15); |
799 |
|
800 |
/* This is correct because Linux defines
|
801 |
* elf_addr_t as Elf32_Off / Elf64_Off
|
802 |
*/
|
803 |
#define NEW_AUX_ENT(id, val) do { \ |
804 |
sp -= n; put_user_ual(val, sp); \ |
805 |
sp -= n; put_user_ual(id, sp); \ |
806 |
} while(0) |
807 |
|
808 |
NEW_AUX_ENT (AT_NULL, 0);
|
809 |
|
810 |
/* There must be exactly DLINFO_ITEMS entries here. */
|
811 |
NEW_AUX_ENT(AT_PHDR, (abi_ulong)(load_addr + exec->e_phoff)); |
812 |
NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr))); |
813 |
NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum)); |
814 |
NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE)); |
815 |
NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_load_addr)); |
816 |
NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
|
817 |
NEW_AUX_ENT(AT_ENTRY, load_bias + exec->e_entry); |
818 |
NEW_AUX_ENT(AT_UID, (abi_ulong) getuid()); |
819 |
NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid()); |
820 |
NEW_AUX_ENT(AT_GID, (abi_ulong) getgid()); |
821 |
NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid()); |
822 |
NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP); |
823 |
NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK)); |
824 |
if (k_platform)
|
825 |
NEW_AUX_ENT(AT_PLATFORM, u_platform); |
826 |
#ifdef ARCH_DLINFO
|
827 |
/*
|
828 |
* ARCH_DLINFO must come last so platform specific code can enforce
|
829 |
* special alignment requirements on the AUXV if necessary (eg. PPC).
|
830 |
*/
|
831 |
ARCH_DLINFO; |
832 |
#endif
|
833 |
#undef NEW_AUX_ENT
|
834 |
|
835 |
sp = loader_build_argptr(envc, argc, sp, p, !ibcs); |
836 |
return sp;
|
837 |
} |
838 |
|
839 |
|
840 |
static abi_ulong load_elf_interp(struct elfhdr * interp_elf_ex, |
841 |
int interpreter_fd,
|
842 |
abi_ulong *interp_load_addr) |
843 |
{ |
844 |
struct elf_phdr *elf_phdata = NULL; |
845 |
struct elf_phdr *eppnt;
|
846 |
abi_ulong load_addr = 0;
|
847 |
int load_addr_set = 0; |
848 |
int retval;
|
849 |
abi_ulong last_bss, elf_bss; |
850 |
abi_ulong error; |
851 |
int i;
|
852 |
|
853 |
elf_bss = 0;
|
854 |
last_bss = 0;
|
855 |
error = 0;
|
856 |
|
857 |
#ifdef BSWAP_NEEDED
|
858 |
bswap_ehdr(interp_elf_ex); |
859 |
#endif
|
860 |
/* First of all, some simple consistency checks */
|
861 |
if ((interp_elf_ex->e_type != ET_EXEC &&
|
862 |
interp_elf_ex->e_type != ET_DYN) || |
863 |
!elf_check_arch(interp_elf_ex->e_machine)) { |
864 |
return ~((abi_ulong)0UL); |
865 |
} |
866 |
|
867 |
|
868 |
/* Now read in all of the header information */
|
869 |
|
870 |
if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE) |
871 |
return ~(abi_ulong)0UL; |
872 |
|
873 |
elf_phdata = (struct elf_phdr *)
|
874 |
malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); |
875 |
|
876 |
if (!elf_phdata)
|
877 |
return ~((abi_ulong)0UL); |
878 |
|
879 |
/*
|
880 |
* If the size of this structure has changed, then punt, since
|
881 |
* we will be doing the wrong thing.
|
882 |
*/
|
883 |
if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) { |
884 |
free(elf_phdata); |
885 |
return ~((abi_ulong)0UL); |
886 |
} |
887 |
|
888 |
retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET); |
889 |
if(retval >= 0) { |
890 |
retval = read(interpreter_fd, |
891 |
(char *) elf_phdata,
|
892 |
sizeof(struct elf_phdr) * interp_elf_ex->e_phnum); |
893 |
} |
894 |
if (retval < 0) { |
895 |
perror("load_elf_interp");
|
896 |
exit(-1);
|
897 |
free (elf_phdata); |
898 |
return retval;
|
899 |
} |
900 |
#ifdef BSWAP_NEEDED
|
901 |
eppnt = elf_phdata; |
902 |
for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) { |
903 |
bswap_phdr(eppnt); |
904 |
} |
905 |
#endif
|
906 |
|
907 |
if (interp_elf_ex->e_type == ET_DYN) {
|
908 |
/* in order to avoid hardcoding the interpreter load
|
909 |
address in qemu, we allocate a big enough memory zone */
|
910 |
error = target_mmap(0, INTERP_MAP_SIZE,
|
911 |
PROT_NONE, MAP_PRIVATE | MAP_ANON, |
912 |
-1, 0); |
913 |
if (error == -1) { |
914 |
perror("mmap");
|
915 |
exit(-1);
|
916 |
} |
917 |
load_addr = error; |
918 |
load_addr_set = 1;
|
919 |
} |
920 |
|
921 |
eppnt = elf_phdata; |
922 |
for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) |
923 |
if (eppnt->p_type == PT_LOAD) {
|
924 |
int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
|
925 |
int elf_prot = 0; |
926 |
abi_ulong vaddr = 0;
|
927 |
abi_ulong k; |
928 |
|
929 |
if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
|
930 |
if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
|
931 |
if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
|
932 |
if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) {
|
933 |
elf_type |= MAP_FIXED; |
934 |
vaddr = eppnt->p_vaddr; |
935 |
} |
936 |
error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr), |
937 |
eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr), |
938 |
elf_prot, |
939 |
elf_type, |
940 |
interpreter_fd, |
941 |
eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr)); |
942 |
|
943 |
if (error == -1) { |
944 |
/* Real error */
|
945 |
close(interpreter_fd); |
946 |
free(elf_phdata); |
947 |
return ~((abi_ulong)0UL); |
948 |
} |
949 |
|
950 |
if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
|
951 |
load_addr = error; |
952 |
load_addr_set = 1;
|
953 |
} |
954 |
|
955 |
/*
|
956 |
* Find the end of the file mapping for this phdr, and keep
|
957 |
* track of the largest address we see for this.
|
958 |
*/
|
959 |
k = load_addr + eppnt->p_vaddr + eppnt->p_filesz; |
960 |
if (k > elf_bss) elf_bss = k;
|
961 |
|
962 |
/*
|
963 |
* Do the same thing for the memory mapping - between
|
964 |
* elf_bss and last_bss is the bss section.
|
965 |
*/
|
966 |
k = load_addr + eppnt->p_memsz + eppnt->p_vaddr; |
967 |
if (k > last_bss) last_bss = k;
|
968 |
} |
969 |
|
970 |
/* Now use mmap to map the library into memory. */
|
971 |
|
972 |
close(interpreter_fd); |
973 |
|
974 |
/*
|
975 |
* Now fill out the bss section. First pad the last page up
|
976 |
* to the page boundary, and then perform a mmap to make sure
|
977 |
* that there are zeromapped pages up to and including the last
|
978 |
* bss page.
|
979 |
*/
|
980 |
padzero(elf_bss, last_bss); |
981 |
elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */ |
982 |
|
983 |
/* Map the last of the bss segment */
|
984 |
if (last_bss > elf_bss) {
|
985 |
target_mmap(elf_bss, last_bss-elf_bss, |
986 |
PROT_READ|PROT_WRITE|PROT_EXEC, |
987 |
MAP_FIXED|MAP_PRIVATE|MAP_ANON, -1, 0); |
988 |
} |
989 |
free(elf_phdata); |
990 |
|
991 |
*interp_load_addr = load_addr; |
992 |
return ((abi_ulong) interp_elf_ex->e_entry) + load_addr;
|
993 |
} |
994 |
|
995 |
static int symfind(const void *s0, const void *s1) |
996 |
{ |
997 |
struct elf_sym *key = (struct elf_sym *)s0; |
998 |
struct elf_sym *sym = (struct elf_sym *)s1; |
999 |
int result = 0; |
1000 |
if (key->st_value < sym->st_value) {
|
1001 |
result = -1;
|
1002 |
} else if (key->st_value > sym->st_value + sym->st_size) { |
1003 |
result = 1;
|
1004 |
} |
1005 |
return result;
|
1006 |
} |
1007 |
|
1008 |
static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr) |
1009 |
{ |
1010 |
#if ELF_CLASS == ELFCLASS32
|
1011 |
struct elf_sym *syms = s->disas_symtab.elf32;
|
1012 |
#else
|
1013 |
struct elf_sym *syms = s->disas_symtab.elf64;
|
1014 |
#endif
|
1015 |
|
1016 |
// binary search
|
1017 |
struct elf_sym key;
|
1018 |
struct elf_sym *sym;
|
1019 |
|
1020 |
key.st_value = orig_addr; |
1021 |
|
1022 |
sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), symfind);
|
1023 |
if (sym != NULL) { |
1024 |
return s->disas_strtab + sym->st_name;
|
1025 |
} |
1026 |
|
1027 |
return ""; |
1028 |
} |
1029 |
|
1030 |
/* FIXME: This should use elf_ops.h */
|
1031 |
static int symcmp(const void *s0, const void *s1) |
1032 |
{ |
1033 |
struct elf_sym *sym0 = (struct elf_sym *)s0; |
1034 |
struct elf_sym *sym1 = (struct elf_sym *)s1; |
1035 |
return (sym0->st_value < sym1->st_value)
|
1036 |
? -1
|
1037 |
: ((sym0->st_value > sym1->st_value) ? 1 : 0); |
1038 |
} |
1039 |
|
1040 |
/* Best attempt to load symbols from this ELF object. */
|
1041 |
static void load_symbols(struct elfhdr *hdr, int fd) |
1042 |
{ |
1043 |
unsigned int i, nsyms; |
1044 |
struct elf_shdr sechdr, symtab, strtab;
|
1045 |
char *strings;
|
1046 |
struct syminfo *s;
|
1047 |
struct elf_sym *syms;
|
1048 |
|
1049 |
lseek(fd, hdr->e_shoff, SEEK_SET); |
1050 |
for (i = 0; i < hdr->e_shnum; i++) { |
1051 |
if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr)) |
1052 |
return;
|
1053 |
#ifdef BSWAP_NEEDED
|
1054 |
bswap_shdr(&sechdr); |
1055 |
#endif
|
1056 |
if (sechdr.sh_type == SHT_SYMTAB) {
|
1057 |
symtab = sechdr; |
1058 |
lseek(fd, hdr->e_shoff |
1059 |
+ sizeof(sechdr) * sechdr.sh_link, SEEK_SET);
|
1060 |
if (read(fd, &strtab, sizeof(strtab)) |
1061 |
!= sizeof(strtab))
|
1062 |
return;
|
1063 |
#ifdef BSWAP_NEEDED
|
1064 |
bswap_shdr(&strtab); |
1065 |
#endif
|
1066 |
goto found;
|
1067 |
} |
1068 |
} |
1069 |
return; /* Shouldn't happen... */ |
1070 |
|
1071 |
found:
|
1072 |
/* Now know where the strtab and symtab are. Snarf them. */
|
1073 |
s = malloc(sizeof(*s));
|
1074 |
syms = malloc(symtab.sh_size); |
1075 |
if (!syms)
|
1076 |
return;
|
1077 |
s->disas_strtab = strings = malloc(strtab.sh_size); |
1078 |
if (!s->disas_strtab)
|
1079 |
return;
|
1080 |
|
1081 |
lseek(fd, symtab.sh_offset, SEEK_SET); |
1082 |
if (read(fd, syms, symtab.sh_size) != symtab.sh_size)
|
1083 |
return;
|
1084 |
|
1085 |
nsyms = symtab.sh_size / sizeof(struct elf_sym); |
1086 |
|
1087 |
i = 0;
|
1088 |
while (i < nsyms) {
|
1089 |
#ifdef BSWAP_NEEDED
|
1090 |
bswap_sym(syms + i); |
1091 |
#endif
|
1092 |
// Throw away entries which we do not need.
|
1093 |
if (syms[i].st_shndx == SHN_UNDEF ||
|
1094 |
syms[i].st_shndx >= SHN_LORESERVE || |
1095 |
ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) { |
1096 |
nsyms--; |
1097 |
if (i < nsyms) {
|
1098 |
syms[i] = syms[nsyms]; |
1099 |
} |
1100 |
continue;
|
1101 |
} |
1102 |
#if defined(TARGET_ARM) || defined (TARGET_MIPS)
|
1103 |
/* The bottom address bit marks a Thumb or MIPS16 symbol. */
|
1104 |
syms[i].st_value &= ~(target_ulong)1;
|
1105 |
#endif
|
1106 |
i++; |
1107 |
} |
1108 |
syms = realloc(syms, nsyms * sizeof(*syms));
|
1109 |
|
1110 |
qsort(syms, nsyms, sizeof(*syms), symcmp);
|
1111 |
|
1112 |
lseek(fd, strtab.sh_offset, SEEK_SET); |
1113 |
if (read(fd, strings, strtab.sh_size) != strtab.sh_size)
|
1114 |
return;
|
1115 |
s->disas_num_syms = nsyms; |
1116 |
#if ELF_CLASS == ELFCLASS32
|
1117 |
s->disas_symtab.elf32 = syms; |
1118 |
s->lookup_symbol = (lookup_symbol_t)lookup_symbolxx; |
1119 |
#else
|
1120 |
s->disas_symtab.elf64 = syms; |
1121 |
s->lookup_symbol = (lookup_symbol_t)lookup_symbolxx; |
1122 |
#endif
|
1123 |
s->next = syminfos; |
1124 |
syminfos = s; |
1125 |
} |
1126 |
|
1127 |
int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, |
1128 |
struct image_info * info)
|
1129 |
{ |
1130 |
struct elfhdr elf_ex;
|
1131 |
struct elfhdr interp_elf_ex;
|
1132 |
struct exec interp_ex;
|
1133 |
int interpreter_fd = -1; /* avoid warning */ |
1134 |
abi_ulong load_addr, load_bias; |
1135 |
int load_addr_set = 0; |
1136 |
unsigned int interpreter_type = INTERPRETER_NONE; |
1137 |
unsigned char ibcs2_interpreter; |
1138 |
int i;
|
1139 |
abi_ulong mapped_addr; |
1140 |
struct elf_phdr * elf_ppnt;
|
1141 |
struct elf_phdr *elf_phdata;
|
1142 |
abi_ulong elf_bss, k, elf_brk; |
1143 |
int retval;
|
1144 |
char * elf_interpreter;
|
1145 |
abi_ulong elf_entry, interp_load_addr = 0;
|
1146 |
int status;
|
1147 |
abi_ulong start_code, end_code, start_data, end_data; |
1148 |
abi_ulong reloc_func_desc = 0;
|
1149 |
abi_ulong elf_stack; |
1150 |
char passed_fileno[6]; |
1151 |
|
1152 |
ibcs2_interpreter = 0;
|
1153 |
status = 0;
|
1154 |
load_addr = 0;
|
1155 |
load_bias = 0;
|
1156 |
elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */ |
1157 |
#ifdef BSWAP_NEEDED
|
1158 |
bswap_ehdr(&elf_ex); |
1159 |
#endif
|
1160 |
|
1161 |
/* First of all, some simple consistency checks */
|
1162 |
if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||
|
1163 |
(! elf_check_arch(elf_ex.e_machine))) { |
1164 |
return -ENOEXEC;
|
1165 |
} |
1166 |
|
1167 |
bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
|
1168 |
bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p); |
1169 |
bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p); |
1170 |
if (!bprm->p) {
|
1171 |
retval = -E2BIG; |
1172 |
} |
1173 |
|
1174 |
/* Now read in all of the header information */
|
1175 |
elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum);
|
1176 |
if (elf_phdata == NULL) { |
1177 |
return -ENOMEM;
|
1178 |
} |
1179 |
|
1180 |
retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET); |
1181 |
if(retval > 0) { |
1182 |
retval = read(bprm->fd, (char *) elf_phdata,
|
1183 |
elf_ex.e_phentsize * elf_ex.e_phnum); |
1184 |
} |
1185 |
|
1186 |
if (retval < 0) { |
1187 |
perror("load_elf_binary");
|
1188 |
exit(-1);
|
1189 |
free (elf_phdata); |
1190 |
return -errno;
|
1191 |
} |
1192 |
|
1193 |
#ifdef BSWAP_NEEDED
|
1194 |
elf_ppnt = elf_phdata; |
1195 |
for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) { |
1196 |
bswap_phdr(elf_ppnt); |
1197 |
} |
1198 |
#endif
|
1199 |
elf_ppnt = elf_phdata; |
1200 |
|
1201 |
elf_bss = 0;
|
1202 |
elf_brk = 0;
|
1203 |
|
1204 |
|
1205 |
elf_stack = ~((abi_ulong)0UL);
|
1206 |
elf_interpreter = NULL;
|
1207 |
start_code = ~((abi_ulong)0UL);
|
1208 |
end_code = 0;
|
1209 |
start_data = 0;
|
1210 |
end_data = 0;
|
1211 |
interp_ex.a_info = 0;
|
1212 |
|
1213 |
for(i=0;i < elf_ex.e_phnum; i++) { |
1214 |
if (elf_ppnt->p_type == PT_INTERP) {
|
1215 |
if ( elf_interpreter != NULL ) |
1216 |
{ |
1217 |
free (elf_phdata); |
1218 |
free(elf_interpreter); |
1219 |
close(bprm->fd); |
1220 |
return -EINVAL;
|
1221 |
} |
1222 |
|
1223 |
/* This is the program interpreter used for
|
1224 |
* shared libraries - for now assume that this
|
1225 |
* is an a.out format binary
|
1226 |
*/
|
1227 |
|
1228 |
elf_interpreter = (char *)malloc(elf_ppnt->p_filesz);
|
1229 |
|
1230 |
if (elf_interpreter == NULL) { |
1231 |
free (elf_phdata); |
1232 |
close(bprm->fd); |
1233 |
return -ENOMEM;
|
1234 |
} |
1235 |
|
1236 |
retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET); |
1237 |
if(retval >= 0) { |
1238 |
retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz); |
1239 |
} |
1240 |
if(retval < 0) { |
1241 |
perror("load_elf_binary2");
|
1242 |
exit(-1);
|
1243 |
} |
1244 |
|
1245 |
/* If the program interpreter is one of these two,
|
1246 |
then assume an iBCS2 image. Otherwise assume
|
1247 |
a native linux image. */
|
1248 |
|
1249 |
/* JRP - Need to add X86 lib dir stuff here... */
|
1250 |
|
1251 |
if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 || |
1252 |
strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) { |
1253 |
ibcs2_interpreter = 1;
|
1254 |
} |
1255 |
|
1256 |
#if 0
|
1257 |
printf("Using ELF interpreter %s\n", path(elf_interpreter));
|
1258 |
#endif
|
1259 |
if (retval >= 0) { |
1260 |
retval = open(path(elf_interpreter), O_RDONLY); |
1261 |
if(retval >= 0) { |
1262 |
interpreter_fd = retval; |
1263 |
} |
1264 |
else {
|
1265 |
perror(elf_interpreter); |
1266 |
exit(-1);
|
1267 |
/* retval = -errno; */
|
1268 |
} |
1269 |
} |
1270 |
|
1271 |
if (retval >= 0) { |
1272 |
retval = lseek(interpreter_fd, 0, SEEK_SET);
|
1273 |
if(retval >= 0) { |
1274 |
retval = read(interpreter_fd,bprm->buf,128);
|
1275 |
} |
1276 |
} |
1277 |
if (retval >= 0) { |
1278 |
interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */ |
1279 |
interp_elf_ex = *((struct elfhdr *) bprm->buf); /* elf exec-header */ |
1280 |
} |
1281 |
if (retval < 0) { |
1282 |
perror("load_elf_binary3");
|
1283 |
exit(-1);
|
1284 |
free (elf_phdata); |
1285 |
free(elf_interpreter); |
1286 |
close(bprm->fd); |
1287 |
return retval;
|
1288 |
} |
1289 |
} |
1290 |
elf_ppnt++; |
1291 |
} |
1292 |
|
1293 |
/* Some simple consistency checks for the interpreter */
|
1294 |
if (elf_interpreter){
|
1295 |
interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT; |
1296 |
|
1297 |
/* Now figure out which format our binary is */
|
1298 |
if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) &&
|
1299 |
(N_MAGIC(interp_ex) != QMAGIC)) { |
1300 |
interpreter_type = INTERPRETER_ELF; |
1301 |
} |
1302 |
|
1303 |
if (interp_elf_ex.e_ident[0] != 0x7f || |
1304 |
strncmp((char *)&interp_elf_ex.e_ident[1], "ELF",3) != 0) { |
1305 |
interpreter_type &= ~INTERPRETER_ELF; |
1306 |
} |
1307 |
|
1308 |
if (!interpreter_type) {
|
1309 |
free(elf_interpreter); |
1310 |
free(elf_phdata); |
1311 |
close(bprm->fd); |
1312 |
return -ELIBBAD;
|
1313 |
} |
1314 |
} |
1315 |
|
1316 |
/* OK, we are done with that, now set up the arg stuff,
|
1317 |
and then start this sucker up */
|
1318 |
|
1319 |
{ |
1320 |
char * passed_p;
|
1321 |
|
1322 |
if (interpreter_type == INTERPRETER_AOUT) {
|
1323 |
snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd); |
1324 |
passed_p = passed_fileno; |
1325 |
|
1326 |
if (elf_interpreter) {
|
1327 |
bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p);
|
1328 |
bprm->argc++; |
1329 |
} |
1330 |
} |
1331 |
if (!bprm->p) {
|
1332 |
if (elf_interpreter) {
|
1333 |
free(elf_interpreter); |
1334 |
} |
1335 |
free (elf_phdata); |
1336 |
close(bprm->fd); |
1337 |
return -E2BIG;
|
1338 |
} |
1339 |
} |
1340 |
|
1341 |
/* OK, This is the point of no return */
|
1342 |
info->end_data = 0;
|
1343 |
info->end_code = 0;
|
1344 |
info->start_mmap = (abi_ulong)ELF_START_MMAP; |
1345 |
info->mmap = 0;
|
1346 |
elf_entry = (abi_ulong) elf_ex.e_entry; |
1347 |
|
1348 |
#if defined(CONFIG_USE_GUEST_BASE)
|
1349 |
/*
|
1350 |
* In case where user has not explicitly set the guest_base, we
|
1351 |
* probe here that should we set it automatically.
|
1352 |
*/
|
1353 |
if (!have_guest_base) {
|
1354 |
/*
|
1355 |
* Go through ELF program header table and find out whether
|
1356 |
* any of the segments drop below our current mmap_min_addr and
|
1357 |
* in that case set guest_base to corresponding address.
|
1358 |
*/
|
1359 |
for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; |
1360 |
i++, elf_ppnt++) { |
1361 |
if (elf_ppnt->p_type != PT_LOAD)
|
1362 |
continue;
|
1363 |
if (HOST_PAGE_ALIGN(elf_ppnt->p_vaddr) < mmap_min_addr) {
|
1364 |
guest_base = HOST_PAGE_ALIGN(mmap_min_addr); |
1365 |
break;
|
1366 |
} |
1367 |
} |
1368 |
} |
1369 |
#endif /* CONFIG_USE_GUEST_BASE */ |
1370 |
|
1371 |
/* Do this so that we can load the interpreter, if need be. We will
|
1372 |
change some of these later */
|
1373 |
info->rss = 0;
|
1374 |
bprm->p = setup_arg_pages(bprm->p, bprm, info); |
1375 |
info->start_stack = bprm->p; |
1376 |
|
1377 |
/* Now we do a little grungy work by mmaping the ELF image into
|
1378 |
* the correct location in memory. At this point, we assume that
|
1379 |
* the image should be loaded at fixed address, not at a variable
|
1380 |
* address.
|
1381 |
*/
|
1382 |
|
1383 |
for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) { |
1384 |
int elf_prot = 0; |
1385 |
int elf_flags = 0; |
1386 |
abi_ulong error; |
1387 |
|
1388 |
if (elf_ppnt->p_type != PT_LOAD)
|
1389 |
continue;
|
1390 |
|
1391 |
if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
|
1392 |
if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
|
1393 |
if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
|
1394 |
elf_flags = MAP_PRIVATE | MAP_DENYWRITE; |
1395 |
if (elf_ex.e_type == ET_EXEC || load_addr_set) {
|
1396 |
elf_flags |= MAP_FIXED; |
1397 |
} else if (elf_ex.e_type == ET_DYN) { |
1398 |
/* Try and get dynamic programs out of the way of the default mmap
|
1399 |
base, as well as whatever program they might try to exec. This
|
1400 |
is because the brk will follow the loader, and is not movable. */
|
1401 |
/* NOTE: for qemu, we do a big mmap to get enough space
|
1402 |
without hardcoding any address */
|
1403 |
error = target_mmap(0, ET_DYN_MAP_SIZE,
|
1404 |
PROT_NONE, MAP_PRIVATE | MAP_ANON, |
1405 |
-1, 0); |
1406 |
if (error == -1) { |
1407 |
perror("mmap");
|
1408 |
exit(-1);
|
1409 |
} |
1410 |
load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr); |
1411 |
} |
1412 |
|
1413 |
error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr), |
1414 |
(elf_ppnt->p_filesz + |
1415 |
TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)), |
1416 |
elf_prot, |
1417 |
(MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE), |
1418 |
bprm->fd, |
1419 |
(elf_ppnt->p_offset - |
1420 |
TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr))); |
1421 |
if (error == -1) { |
1422 |
perror("mmap");
|
1423 |
exit(-1);
|
1424 |
} |
1425 |
|
1426 |
#ifdef LOW_ELF_STACK
|
1427 |
if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
|
1428 |
elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr); |
1429 |
#endif
|
1430 |
|
1431 |
if (!load_addr_set) {
|
1432 |
load_addr_set = 1;
|
1433 |
load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset; |
1434 |
if (elf_ex.e_type == ET_DYN) {
|
1435 |
load_bias += error - |
1436 |
TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr); |
1437 |
load_addr += load_bias; |
1438 |
reloc_func_desc = load_bias; |
1439 |
} |
1440 |
} |
1441 |
k = elf_ppnt->p_vaddr; |
1442 |
if (k < start_code)
|
1443 |
start_code = k; |
1444 |
if (start_data < k)
|
1445 |
start_data = k; |
1446 |
k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz; |
1447 |
if (k > elf_bss)
|
1448 |
elf_bss = k; |
1449 |
if ((elf_ppnt->p_flags & PF_X) && end_code < k)
|
1450 |
end_code = k; |
1451 |
if (end_data < k)
|
1452 |
end_data = k; |
1453 |
k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz; |
1454 |
if (k > elf_brk) elf_brk = k;
|
1455 |
} |
1456 |
|
1457 |
elf_entry += load_bias; |
1458 |
elf_bss += load_bias; |
1459 |
elf_brk += load_bias; |
1460 |
start_code += load_bias; |
1461 |
end_code += load_bias; |
1462 |
start_data += load_bias; |
1463 |
end_data += load_bias; |
1464 |
|
1465 |
if (elf_interpreter) {
|
1466 |
if (interpreter_type & 1) { |
1467 |
elf_entry = load_aout_interp(&interp_ex, interpreter_fd); |
1468 |
} |
1469 |
else if (interpreter_type & 2) { |
1470 |
elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd, |
1471 |
&interp_load_addr); |
1472 |
} |
1473 |
reloc_func_desc = interp_load_addr; |
1474 |
|
1475 |
close(interpreter_fd); |
1476 |
free(elf_interpreter); |
1477 |
|
1478 |
if (elf_entry == ~((abi_ulong)0UL)) { |
1479 |
printf("Unable to load interpreter\n");
|
1480 |
free(elf_phdata); |
1481 |
exit(-1);
|
1482 |
return 0; |
1483 |
} |
1484 |
} |
1485 |
|
1486 |
free(elf_phdata); |
1487 |
|
1488 |
if (qemu_log_enabled())
|
1489 |
load_symbols(&elf_ex, bprm->fd); |
1490 |
|
1491 |
if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd);
|
1492 |
info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX); |
1493 |
|
1494 |
#ifdef LOW_ELF_STACK
|
1495 |
info->start_stack = bprm->p = elf_stack - 4;
|
1496 |
#endif
|
1497 |
bprm->p = create_elf_tables(bprm->p, |
1498 |
bprm->argc, |
1499 |
bprm->envc, |
1500 |
&elf_ex, |
1501 |
load_addr, load_bias, |
1502 |
interp_load_addr, |
1503 |
(interpreter_type == INTERPRETER_AOUT ? 0 : 1), |
1504 |
info); |
1505 |
info->load_addr = reloc_func_desc; |
1506 |
info->start_brk = info->brk = elf_brk; |
1507 |
info->end_code = end_code; |
1508 |
info->start_code = start_code; |
1509 |
info->start_data = start_data; |
1510 |
info->end_data = end_data; |
1511 |
info->start_stack = bprm->p; |
1512 |
|
1513 |
/* Calling set_brk effectively mmaps the pages that we need for the bss and break
|
1514 |
sections */
|
1515 |
set_brk(elf_bss, elf_brk); |
1516 |
|
1517 |
padzero(elf_bss, elf_brk); |
1518 |
|
1519 |
#if 0
|
1520 |
printf("(start_brk) %x\n" , info->start_brk);
|
1521 |
printf("(end_code) %x\n" , info->end_code);
|
1522 |
printf("(start_code) %x\n" , info->start_code);
|
1523 |
printf("(end_data) %x\n" , info->end_data);
|
1524 |
printf("(start_stack) %x\n" , info->start_stack);
|
1525 |
printf("(brk) %x\n" , info->brk);
|
1526 |
#endif
|
1527 |
|
1528 |
if ( info->personality == PER_SVR4 )
|
1529 |
{ |
1530 |
/* Why this, you ask??? Well SVr4 maps page 0 as read-only,
|
1531 |
and some applications "depend" upon this behavior.
|
1532 |
Since we do not have the power to recompile these, we
|
1533 |
emulate the SVr4 behavior. Sigh. */
|
1534 |
mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
|
1535 |
MAP_FIXED | MAP_PRIVATE, -1, 0); |
1536 |
} |
1537 |
|
1538 |
info->entry = elf_entry; |
1539 |
|
1540 |
return 0; |
1541 |
} |
1542 |
|
1543 |
static int load_aout_interp(void * exptr, int interp_fd) |
1544 |
{ |
1545 |
printf("a.out interpreter not yet supported\n");
|
1546 |
return(0); |
1547 |
} |
1548 |
|
1549 |
void do_init_thread(struct target_pt_regs *regs, struct image_info *infop) |
1550 |
{ |
1551 |
init_thread(regs, infop); |
1552 |
} |