2003-02-19 01:55:36 +03:00
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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 <sys/stat.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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2003-03-23 23:17:16 +03:00
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#include "qemu.h"
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2003-04-30 00:40:07 +04:00
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#include "disas.h"
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2003-02-19 01:55:36 +03:00
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2004-07-06 01:25:26 +04:00
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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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2003-04-08 01:33:03 +04:00
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#ifdef TARGET_I386
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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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/* 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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#define ELF_PLAT_INIT(_r) _r->edx = 0
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2003-06-16 00:05:50 +04:00
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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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}
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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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#define ELF_PLAT_INIT(_r) _r->ARM_r0 = 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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target_long *stack = (void *)infop->start_stack;
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memset(regs, 0, sizeof(*regs));
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regs->ARM_cpsr = 0x10;
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regs->ARM_pc = infop->entry;
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regs->ARM_sp = infop->start_stack;
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regs->ARM_r2 = tswapl(stack[2]); /* envp */
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regs->ARM_r1 = tswapl(stack[1]); /* argv */
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2003-07-09 21:13:37 +04:00
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/* XXX: it seems that r0 is zeroed after ! */
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// regs->ARM_r0 = tswapl(stack[0]); /* argc */
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2003-06-16 00:05:50 +04:00
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}
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2003-04-08 01:33:03 +04:00
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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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2003-10-01 00:58:32 +04:00
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#ifdef TARGET_SPARC
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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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/*XXX*/
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#define ELF_PLAT_INIT(_r)
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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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2004-01-04 18:46:50 +03:00
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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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2003-10-01 00:58:32 +04:00
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}
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#endif
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2003-11-23 20:05:30 +03:00
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#ifdef TARGET_PPC
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#define ELF_START_MMAP 0x80000000
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#define elf_check_arch(x) ( (x) == EM_PPC )
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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_PPC
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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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#define ELF_PLAT_INIT(_r) \
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do { \
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2004-05-21 01:56:27 +04:00
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target_ulong *pos = (target_ulong *)bprm->p, tmp = 1; \
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2003-11-23 20:05:30 +03:00
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_r->gpr[3] = bprm->argc; \
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_r->gpr[4] = (unsigned long)++pos; \
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for (; tmp != 0; pos++) \
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tmp = *pos; \
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2004-01-04 18:46:50 +03:00
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_r->gpr[5] = (unsigned long)pos; \
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2003-11-23 20:05:30 +03:00
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} while (0)
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2004-01-04 18:46:50 +03:00
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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 3
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#define ARCH_DLINFO \
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do { \
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sp -= DLINFO_ARCH_ITEMS * 2; \
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NEW_AUX_ENT(0, AT_DCACHEBSIZE, 0x20); \
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NEW_AUX_ENT(1, AT_ICACHEBSIZE, 0x20); \
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NEW_AUX_ENT(2, AT_UCACHEBSIZE, 0); \
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/* \
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* Now handle glibc compatibility. \
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*/ \
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sp -= 2*2; \
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NEW_AUX_ENT(0, AT_IGNOREPPC, AT_IGNOREPPC); \
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NEW_AUX_ENT(1, AT_IGNOREPPC, AT_IGNOREPPC); \
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} while (0)
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2003-11-23 20:05:30 +03:00
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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->msr = 1 << MSR_PR; /* Set user mode */
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_regs->gpr[1] = infop->start_stack;
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_regs->nip = infop->entry;
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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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2003-02-19 01:55:36 +03:00
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#include "elf.h"
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2003-04-10 04:03:40 +04:00
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/*
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* MAX_ARG_PAGES defines the number of pages allocated for arguments
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* and envelope for the new program. 32 should suffice, this gives
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* a maximum env+arg of 128kB w/4KB pages!
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*/
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#define MAX_ARG_PAGES 32
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/*
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* This structure is used to hold the arguments that are
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* used when loading binaries.
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*/
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struct linux_binprm {
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char buf[128];
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unsigned long page[MAX_ARG_PAGES];
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unsigned long p;
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int sh_bang;
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int fd;
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int e_uid, e_gid;
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int argc, envc;
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char * filename; /* Name of binary */
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unsigned long loader, exec;
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int dont_iput; /* binfmt handler has put inode */
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};
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struct exec
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{
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unsigned int a_info; /* Use macros N_MAGIC, etc for access */
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unsigned int a_text; /* length of text, in bytes */
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unsigned int a_data; /* length of data, in bytes */
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unsigned int a_bss; /* length of uninitialized data area, in bytes */
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unsigned int a_syms; /* length of symbol table data in file, in bytes */
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unsigned int a_entry; /* start address */
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unsigned int a_trsize; /* length of relocation info for text, in bytes */
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unsigned int a_drsize; /* length of relocation info for data, in bytes */
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};
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#define N_MAGIC(exec) ((exec).a_info & 0xffff)
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#define OMAGIC 0407
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#define NMAGIC 0410
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#define ZMAGIC 0413
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#define QMAGIC 0314
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/* max code+data+bss space allocated to elf interpreter */
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#define INTERP_MAP_SIZE (32 * 1024 * 1024)
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/* max code+data+bss+brk space allocated to ET_DYN executables */
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#define ET_DYN_MAP_SIZE (128 * 1024 * 1024)
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/* from personality.h */
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/* Flags for bug emulation. These occupy the top three bytes. */
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#define STICKY_TIMEOUTS 0x4000000
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#define WHOLE_SECONDS 0x2000000
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/* Personality types. These go in the low byte. Avoid using the top bit,
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* it will conflict with error returns.
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*/
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#define PER_MASK (0x00ff)
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#define PER_LINUX (0x0000)
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#define PER_SVR4 (0x0001 | STICKY_TIMEOUTS)
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#define PER_SVR3 (0x0002 | STICKY_TIMEOUTS)
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#define PER_SCOSVR3 (0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS)
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#define PER_WYSEV386 (0x0004 | STICKY_TIMEOUTS)
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#define PER_ISCR4 (0x0005 | STICKY_TIMEOUTS)
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#define PER_BSD (0x0006)
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#define PER_XENIX (0x0007 | STICKY_TIMEOUTS)
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2003-02-19 01:55:36 +03:00
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/* Necessary parameters */
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#define NGROUPS 32
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2003-05-13 04:25:15 +04:00
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#define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
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#define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1))
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#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
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2003-02-19 01:55:36 +03:00
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#define INTERPRETER_NONE 0
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#define INTERPRETER_AOUT 1
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#define INTERPRETER_ELF 2
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2004-01-04 18:46:50 +03:00
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#define DLINFO_ITEMS 11
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2003-02-19 01:55:36 +03:00
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2003-04-10 04:03:40 +04:00
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static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
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{
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memcpy(to, from, n);
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}
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2003-03-25 00:58:34 +03:00
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2003-02-19 01:55:36 +03:00
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extern unsigned long x86_stack_size;
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static int load_aout_interp(void * exptr, int interp_fd);
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#ifdef BSWAP_NEEDED
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static void bswap_ehdr(Elf32_Ehdr *ehdr)
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{
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bswap16s(&ehdr->e_type); /* Object file type */
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bswap16s(&ehdr->e_machine); /* Architecture */
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bswap32s(&ehdr->e_version); /* Object file version */
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bswap32s(&ehdr->e_entry); /* Entry point virtual address */
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bswap32s(&ehdr->e_phoff); /* Program header table file offset */
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bswap32s(&ehdr->e_shoff); /* Section header table file offset */
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bswap32s(&ehdr->e_flags); /* Processor-specific flags */
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bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
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bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
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bswap16s(&ehdr->e_phnum); /* Program header table entry count */
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bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
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bswap16s(&ehdr->e_shnum); /* Section header table entry count */
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bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
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}
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static void bswap_phdr(Elf32_Phdr *phdr)
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{
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bswap32s(&phdr->p_type); /* Segment type */
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bswap32s(&phdr->p_offset); /* Segment file offset */
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bswap32s(&phdr->p_vaddr); /* Segment virtual address */
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bswap32s(&phdr->p_paddr); /* Segment physical address */
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bswap32s(&phdr->p_filesz); /* Segment size in file */
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bswap32s(&phdr->p_memsz); /* Segment size in memory */
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bswap32s(&phdr->p_flags); /* Segment flags */
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bswap32s(&phdr->p_align); /* Segment alignment */
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}
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2003-04-30 00:40:07 +04:00
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static void bswap_shdr(Elf32_Shdr *shdr)
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{
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bswap32s(&shdr->sh_name);
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bswap32s(&shdr->sh_type);
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bswap32s(&shdr->sh_flags);
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bswap32s(&shdr->sh_addr);
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bswap32s(&shdr->sh_offset);
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bswap32s(&shdr->sh_size);
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bswap32s(&shdr->sh_link);
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bswap32s(&shdr->sh_info);
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bswap32s(&shdr->sh_addralign);
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bswap32s(&shdr->sh_entsize);
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}
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static void bswap_sym(Elf32_Sym *sym)
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{
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bswap32s(&sym->st_name);
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bswap32s(&sym->st_value);
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bswap32s(&sym->st_size);
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|
|
bswap16s(&sym->st_shndx);
|
|
|
|
}
|
2003-02-19 01:55:36 +03:00
|
|
|
#endif
|
|
|
|
|
|
|
|
static void * get_free_page(void)
|
|
|
|
{
|
|
|
|
void * retval;
|
|
|
|
|
|
|
|
/* User-space version of kernel get_free_page. Returns a page-aligned
|
|
|
|
* page-sized chunk of memory.
|
|
|
|
*/
|
2004-07-06 01:25:26 +04:00
|
|
|
retval = (void *)target_mmap(0, qemu_host_page_size, PROT_READ|PROT_WRITE,
|
2003-05-13 04:25:15 +04:00
|
|
|
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
|
2003-02-19 01:55:36 +03:00
|
|
|
|
|
|
|
if((long)retval == -1) {
|
|
|
|
perror("get_free_page");
|
|
|
|
exit(-1);
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
return(retval);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void free_page(void * pageaddr)
|
|
|
|
{
|
2004-07-06 01:25:26 +04:00
|
|
|
target_munmap((unsigned long)pageaddr, qemu_host_page_size);
|
2003-02-19 01:55:36 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 'copy_string()' copies argument/envelope strings from user
|
|
|
|
* memory to free pages in kernel mem. These are in a format ready
|
|
|
|
* to be put directly into the top of new user memory.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static unsigned long copy_strings(int argc,char ** argv,unsigned long *page,
|
|
|
|
unsigned long p)
|
|
|
|
{
|
|
|
|
char *tmp, *tmp1, *pag = NULL;
|
|
|
|
int len, offset = 0;
|
|
|
|
|
|
|
|
if (!p) {
|
|
|
|
return 0; /* bullet-proofing */
|
|
|
|
}
|
|
|
|
while (argc-- > 0) {
|
2004-02-22 16:40:13 +03:00
|
|
|
tmp = argv[argc];
|
|
|
|
if (!tmp) {
|
2003-02-19 01:55:36 +03:00
|
|
|
fprintf(stderr, "VFS: argc is wrong");
|
|
|
|
exit(-1);
|
|
|
|
}
|
2004-02-22 16:40:13 +03:00
|
|
|
tmp1 = tmp;
|
|
|
|
while (*tmp++);
|
2003-02-19 01:55:36 +03:00
|
|
|
len = tmp - tmp1;
|
|
|
|
if (p < len) { /* this shouldn't happen - 128kB */
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
while (len) {
|
|
|
|
--p; --tmp; --len;
|
|
|
|
if (--offset < 0) {
|
2003-05-13 04:25:15 +04:00
|
|
|
offset = p % TARGET_PAGE_SIZE;
|
2004-01-19 01:05:44 +03:00
|
|
|
pag = (char *) page[p/TARGET_PAGE_SIZE];
|
|
|
|
if (!pag) {
|
|
|
|
pag = (char *)get_free_page();
|
|
|
|
page[p/TARGET_PAGE_SIZE] = (unsigned long)pag;
|
|
|
|
if (!pag)
|
|
|
|
return 0;
|
2003-02-19 01:55:36 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
if (len == 0 || offset == 0) {
|
2004-02-22 16:40:13 +03:00
|
|
|
*(pag + offset) = *tmp;
|
2003-02-19 01:55:36 +03:00
|
|
|
}
|
|
|
|
else {
|
|
|
|
int bytes_to_copy = (len > offset) ? offset : len;
|
|
|
|
tmp -= bytes_to_copy;
|
|
|
|
p -= bytes_to_copy;
|
|
|
|
offset -= bytes_to_copy;
|
|
|
|
len -= bytes_to_copy;
|
|
|
|
memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return p;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int in_group_p(gid_t g)
|
|
|
|
{
|
|
|
|
/* return TRUE if we're in the specified group, FALSE otherwise */
|
|
|
|
int ngroup;
|
|
|
|
int i;
|
|
|
|
gid_t grouplist[NGROUPS];
|
|
|
|
|
|
|
|
ngroup = getgroups(NGROUPS, grouplist);
|
|
|
|
for(i = 0; i < ngroup; i++) {
|
|
|
|
if(grouplist[i] == g) {
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int count(char ** vec)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for(i = 0; *vec; i++) {
|
|
|
|
vec++;
|
|
|
|
}
|
|
|
|
|
|
|
|
return(i);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int prepare_binprm(struct linux_binprm *bprm)
|
|
|
|
{
|
|
|
|
struct stat st;
|
|
|
|
int mode;
|
|
|
|
int retval, id_change;
|
|
|
|
|
|
|
|
if(fstat(bprm->fd, &st) < 0) {
|
|
|
|
return(-errno);
|
|
|
|
}
|
|
|
|
|
|
|
|
mode = st.st_mode;
|
|
|
|
if(!S_ISREG(mode)) { /* Must be regular file */
|
|
|
|
return(-EACCES);
|
|
|
|
}
|
|
|
|
if(!(mode & 0111)) { /* Must have at least one execute bit set */
|
|
|
|
return(-EACCES);
|
|
|
|
}
|
|
|
|
|
|
|
|
bprm->e_uid = geteuid();
|
|
|
|
bprm->e_gid = getegid();
|
|
|
|
id_change = 0;
|
|
|
|
|
|
|
|
/* Set-uid? */
|
|
|
|
if(mode & S_ISUID) {
|
|
|
|
bprm->e_uid = st.st_uid;
|
|
|
|
if(bprm->e_uid != geteuid()) {
|
|
|
|
id_change = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Set-gid? */
|
|
|
|
/*
|
|
|
|
* If setgid is set but no group execute bit then this
|
|
|
|
* is a candidate for mandatory locking, not a setgid
|
|
|
|
* executable.
|
|
|
|
*/
|
|
|
|
if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
|
|
|
|
bprm->e_gid = st.st_gid;
|
|
|
|
if (!in_group_p(bprm->e_gid)) {
|
|
|
|
id_change = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
memset(bprm->buf, 0, sizeof(bprm->buf));
|
|
|
|
retval = lseek(bprm->fd, 0L, SEEK_SET);
|
|
|
|
if(retval >= 0) {
|
|
|
|
retval = read(bprm->fd, bprm->buf, 128);
|
|
|
|
}
|
|
|
|
if(retval < 0) {
|
|
|
|
perror("prepare_binprm");
|
|
|
|
exit(-1);
|
|
|
|
/* return(-errno); */
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
return(retval);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned long setup_arg_pages(unsigned long p, struct linux_binprm * bprm,
|
|
|
|
struct image_info * info)
|
|
|
|
{
|
2003-04-10 04:03:40 +04:00
|
|
|
unsigned long stack_base, size, error;
|
2003-02-19 01:55:36 +03:00
|
|
|
int i;
|
|
|
|
|
2003-04-10 04:03:40 +04:00
|
|
|
/* Create enough stack to hold everything. If we don't use
|
|
|
|
* it for args, we'll use it for something else...
|
|
|
|
*/
|
|
|
|
size = x86_stack_size;
|
2003-05-13 04:25:15 +04:00
|
|
|
if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE)
|
|
|
|
size = MAX_ARG_PAGES*TARGET_PAGE_SIZE;
|
|
|
|
error = target_mmap(0,
|
2004-07-06 01:25:26 +04:00
|
|
|
size + qemu_host_page_size,
|
2003-05-13 04:25:15 +04:00
|
|
|
PROT_READ | PROT_WRITE,
|
|
|
|
MAP_PRIVATE | MAP_ANONYMOUS,
|
|
|
|
-1, 0);
|
2003-04-10 04:03:40 +04:00
|
|
|
if (error == -1) {
|
|
|
|
perror("stk mmap");
|
|
|
|
exit(-1);
|
|
|
|
}
|
|
|
|
/* we reserve one extra page at the top of the stack as guard */
|
2004-07-06 01:25:26 +04:00
|
|
|
target_mprotect(error + size, qemu_host_page_size, PROT_NONE);
|
2003-02-19 01:55:36 +03:00
|
|
|
|
2003-05-13 04:25:15 +04:00
|
|
|
stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE;
|
2003-02-19 01:55:36 +03:00
|
|
|
p += stack_base;
|
2003-04-10 04:03:40 +04:00
|
|
|
|
2003-02-19 01:55:36 +03:00
|
|
|
if (bprm->loader) {
|
|
|
|
bprm->loader += stack_base;
|
|
|
|
}
|
|
|
|
bprm->exec += stack_base;
|
|
|
|
|
|
|
|
for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
|
|
|
|
if (bprm->page[i]) {
|
|
|
|
info->rss++;
|
|
|
|
|
2003-05-13 04:25:15 +04:00
|
|
|
memcpy((void *)stack_base, (void *)bprm->page[i], TARGET_PAGE_SIZE);
|
2003-02-19 01:55:36 +03:00
|
|
|
free_page((void *)bprm->page[i]);
|
|
|
|
}
|
2003-05-13 04:25:15 +04:00
|
|
|
stack_base += TARGET_PAGE_SIZE;
|
2003-02-19 01:55:36 +03:00
|
|
|
}
|
|
|
|
return p;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void set_brk(unsigned long start, unsigned long end)
|
|
|
|
{
|
|
|
|
/* page-align the start and end addresses... */
|
2003-05-13 04:25:15 +04:00
|
|
|
start = HOST_PAGE_ALIGN(start);
|
|
|
|
end = HOST_PAGE_ALIGN(end);
|
2003-02-19 01:55:36 +03:00
|
|
|
if (end <= start)
|
|
|
|
return;
|
2003-05-13 04:25:15 +04:00
|
|
|
if(target_mmap(start, end - start,
|
|
|
|
PROT_READ | PROT_WRITE | PROT_EXEC,
|
|
|
|
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0) == -1) {
|
2003-02-19 01:55:36 +03:00
|
|
|
perror("cannot mmap brk");
|
|
|
|
exit(-1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2003-10-01 00:58:32 +04:00
|
|
|
/* We need to explicitly zero any fractional pages after the data
|
|
|
|
section (i.e. bss). This would contain the junk from the file that
|
|
|
|
should not be in memory. */
|
2003-02-19 01:55:36 +03:00
|
|
|
static void padzero(unsigned long elf_bss)
|
|
|
|
{
|
|
|
|
unsigned long nbyte;
|
|
|
|
char * fpnt;
|
|
|
|
|
2003-10-01 00:58:32 +04:00
|
|
|
/* XXX: this is really a hack : if the real host page size is
|
|
|
|
smaller than the target page size, some pages after the end
|
|
|
|
of the file may not be mapped. A better fix would be to
|
|
|
|
patch target_mmap(), but it is more complicated as the file
|
|
|
|
size must be known */
|
2004-07-06 01:25:26 +04:00
|
|
|
if (qemu_real_host_page_size < qemu_host_page_size) {
|
2003-10-01 00:58:32 +04:00
|
|
|
unsigned long end_addr, end_addr1;
|
2004-07-06 01:25:26 +04:00
|
|
|
end_addr1 = (elf_bss + qemu_real_host_page_size - 1) &
|
|
|
|
~(qemu_real_host_page_size - 1);
|
2003-10-01 00:58:32 +04:00
|
|
|
end_addr = HOST_PAGE_ALIGN(elf_bss);
|
|
|
|
if (end_addr1 < end_addr) {
|
|
|
|
mmap((void *)end_addr1, end_addr - end_addr1,
|
|
|
|
PROT_READ|PROT_WRITE|PROT_EXEC,
|
|
|
|
MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2004-07-06 01:25:26 +04:00
|
|
|
nbyte = elf_bss & (qemu_host_page_size-1);
|
2003-02-19 01:55:36 +03:00
|
|
|
if (nbyte) {
|
2004-07-06 01:25:26 +04:00
|
|
|
nbyte = qemu_host_page_size - nbyte;
|
2003-02-19 01:55:36 +03:00
|
|
|
fpnt = (char *) elf_bss;
|
|
|
|
do {
|
|
|
|
*fpnt++ = 0;
|
|
|
|
} while (--nbyte);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static unsigned int * create_elf_tables(char *p, int argc, int envc,
|
2003-04-10 04:03:40 +04:00
|
|
|
struct elfhdr * exec,
|
|
|
|
unsigned long load_addr,
|
|
|
|
unsigned long load_bias,
|
|
|
|
unsigned long interp_load_addr, int ibcs,
|
|
|
|
struct image_info *info)
|
2003-02-19 01:55:36 +03:00
|
|
|
{
|
2004-01-04 18:46:50 +03:00
|
|
|
target_ulong *argv, *envp;
|
|
|
|
target_ulong *sp, *csp;
|
2004-02-22 16:40:13 +03:00
|
|
|
int v;
|
|
|
|
|
2004-01-04 18:46:50 +03:00
|
|
|
/*
|
|
|
|
* Force 16 byte _final_ alignment here for generality.
|
|
|
|
*/
|
2003-02-19 01:55:36 +03:00
|
|
|
sp = (unsigned int *) (~15UL & (unsigned long) p);
|
2004-01-04 18:46:50 +03:00
|
|
|
csp = sp;
|
|
|
|
csp -= (DLINFO_ITEMS + 1) * 2;
|
|
|
|
#ifdef DLINFO_ARCH_ITEMS
|
|
|
|
csp -= DLINFO_ARCH_ITEMS*2;
|
|
|
|
#endif
|
|
|
|
csp -= envc+1;
|
|
|
|
csp -= argc+1;
|
|
|
|
csp -= (!ibcs ? 3 : 1); /* argc itself */
|
|
|
|
if ((unsigned long)csp & 15UL)
|
|
|
|
sp -= ((unsigned long)csp & 15UL) / sizeof(*sp);
|
|
|
|
|
|
|
|
#define NEW_AUX_ENT(nr, id, val) \
|
2004-02-22 16:40:13 +03:00
|
|
|
put_user (id, sp + (nr * 2)); \
|
|
|
|
put_user (val, sp + (nr * 2 + 1))
|
2004-01-04 18:46:50 +03:00
|
|
|
sp -= 2;
|
|
|
|
NEW_AUX_ENT (0, AT_NULL, 0);
|
|
|
|
|
|
|
|
sp -= DLINFO_ITEMS*2;
|
|
|
|
NEW_AUX_ENT( 0, AT_PHDR, (target_ulong)(load_addr + exec->e_phoff));
|
|
|
|
NEW_AUX_ENT( 1, AT_PHENT, (target_ulong)(sizeof (struct elf_phdr)));
|
|
|
|
NEW_AUX_ENT( 2, AT_PHNUM, (target_ulong)(exec->e_phnum));
|
|
|
|
NEW_AUX_ENT( 3, AT_PAGESZ, (target_ulong)(TARGET_PAGE_SIZE));
|
|
|
|
NEW_AUX_ENT( 4, AT_BASE, (target_ulong)(interp_load_addr));
|
|
|
|
NEW_AUX_ENT( 5, AT_FLAGS, (target_ulong)0);
|
|
|
|
NEW_AUX_ENT( 6, AT_ENTRY, load_bias + exec->e_entry);
|
|
|
|
NEW_AUX_ENT( 7, AT_UID, (target_ulong) getuid());
|
|
|
|
NEW_AUX_ENT( 8, AT_EUID, (target_ulong) geteuid());
|
|
|
|
NEW_AUX_ENT( 9, AT_GID, (target_ulong) getgid());
|
|
|
|
NEW_AUX_ENT(11, AT_EGID, (target_ulong) getegid());
|
|
|
|
#ifdef ARCH_DLINFO
|
|
|
|
/*
|
|
|
|
* ARCH_DLINFO must come last so platform specific code can enforce
|
|
|
|
* special alignment requirements on the AUXV if necessary (eg. PPC).
|
|
|
|
*/
|
|
|
|
ARCH_DLINFO;
|
|
|
|
#endif
|
|
|
|
#undef NEW_AUX_ENT
|
|
|
|
|
2003-02-19 01:55:36 +03:00
|
|
|
sp -= envc+1;
|
|
|
|
envp = sp;
|
|
|
|
sp -= argc+1;
|
|
|
|
argv = sp;
|
|
|
|
if (!ibcs) {
|
2004-02-22 16:40:13 +03:00
|
|
|
put_user((target_ulong)envp,--sp);
|
|
|
|
put_user((target_ulong)argv,--sp);
|
2003-02-19 01:55:36 +03:00
|
|
|
}
|
2004-02-22 16:40:13 +03:00
|
|
|
put_user(argc,--sp);
|
2003-02-19 01:55:36 +03:00
|
|
|
info->arg_start = (unsigned int)((unsigned long)p & 0xffffffff);
|
|
|
|
while (argc-->0) {
|
2004-02-22 16:40:13 +03:00
|
|
|
put_user((target_ulong)p,argv++);
|
|
|
|
do {
|
|
|
|
get_user(v, p);
|
|
|
|
p++;
|
|
|
|
} while (v != 0);
|
2003-02-19 01:55:36 +03:00
|
|
|
}
|
|
|
|
put_user(0,argv);
|
|
|
|
info->arg_end = info->env_start = (unsigned int)((unsigned long)p & 0xffffffff);
|
|
|
|
while (envc-->0) {
|
2004-02-22 16:40:13 +03:00
|
|
|
put_user((target_ulong)p,envp++);
|
|
|
|
do {
|
|
|
|
get_user(v, p);
|
|
|
|
p++;
|
|
|
|
} while (v != 0);
|
2003-02-19 01:55:36 +03:00
|
|
|
}
|
|
|
|
put_user(0,envp);
|
|
|
|
info->env_end = (unsigned int)((unsigned long)p & 0xffffffff);
|
|
|
|
return sp;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static unsigned long load_elf_interp(struct elfhdr * interp_elf_ex,
|
|
|
|
int interpreter_fd,
|
|
|
|
unsigned long *interp_load_addr)
|
|
|
|
{
|
|
|
|
struct elf_phdr *elf_phdata = NULL;
|
|
|
|
struct elf_phdr *eppnt;
|
2003-04-10 04:03:40 +04:00
|
|
|
unsigned long load_addr = 0;
|
2003-02-19 01:55:36 +03:00
|
|
|
int load_addr_set = 0;
|
|
|
|
int retval;
|
|
|
|
unsigned long last_bss, elf_bss;
|
|
|
|
unsigned long error;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
elf_bss = 0;
|
|
|
|
last_bss = 0;
|
|
|
|
error = 0;
|
|
|
|
|
2003-03-25 02:00:36 +03:00
|
|
|
#ifdef BSWAP_NEEDED
|
|
|
|
bswap_ehdr(interp_elf_ex);
|
|
|
|
#endif
|
2003-02-19 01:55:36 +03:00
|
|
|
/* First of all, some simple consistency checks */
|
|
|
|
if ((interp_elf_ex->e_type != ET_EXEC &&
|
2003-04-10 04:03:40 +04:00
|
|
|
interp_elf_ex->e_type != ET_DYN) ||
|
2003-02-19 01:55:36 +03:00
|
|
|
!elf_check_arch(interp_elf_ex->e_machine)) {
|
|
|
|
return ~0UL;
|
|
|
|
}
|
|
|
|
|
2003-03-25 02:00:36 +03:00
|
|
|
|
2003-02-19 01:55:36 +03:00
|
|
|
/* Now read in all of the header information */
|
|
|
|
|
2003-05-13 04:25:15 +04:00
|
|
|
if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > TARGET_PAGE_SIZE)
|
2003-02-19 01:55:36 +03:00
|
|
|
return ~0UL;
|
|
|
|
|
|
|
|
elf_phdata = (struct elf_phdr *)
|
|
|
|
malloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
|
|
|
|
|
|
|
|
if (!elf_phdata)
|
|
|
|
return ~0UL;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the size of this structure has changed, then punt, since
|
|
|
|
* we will be doing the wrong thing.
|
|
|
|
*/
|
2003-04-10 04:03:40 +04:00
|
|
|
if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr)) {
|
2003-02-19 01:55:36 +03:00
|
|
|
free(elf_phdata);
|
|
|
|
return ~0UL;
|
2003-04-10 04:03:40 +04:00
|
|
|
}
|
2003-02-19 01:55:36 +03:00
|
|
|
|
|
|
|
retval = lseek(interpreter_fd, interp_elf_ex->e_phoff, SEEK_SET);
|
|
|
|
if(retval >= 0) {
|
|
|
|
retval = read(interpreter_fd,
|
|
|
|
(char *) elf_phdata,
|
|
|
|
sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
|
|
|
|
}
|
|
|
|
if (retval < 0) {
|
|
|
|
perror("load_elf_interp");
|
|
|
|
exit(-1);
|
|
|
|
free (elf_phdata);
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
#ifdef BSWAP_NEEDED
|
|
|
|
eppnt = elf_phdata;
|
|
|
|
for (i=0; i<interp_elf_ex->e_phnum; i++, eppnt++) {
|
|
|
|
bswap_phdr(eppnt);
|
|
|
|
}
|
|
|
|
#endif
|
2003-04-10 04:03:40 +04:00
|
|
|
|
|
|
|
if (interp_elf_ex->e_type == ET_DYN) {
|
|
|
|
/* in order to avoid harcoding the interpreter load
|
|
|
|
address in qemu, we allocate a big enough memory zone */
|
2003-05-13 04:25:15 +04:00
|
|
|
error = target_mmap(0, INTERP_MAP_SIZE,
|
|
|
|
PROT_NONE, MAP_PRIVATE | MAP_ANON,
|
|
|
|
-1, 0);
|
2003-04-10 04:03:40 +04:00
|
|
|
if (error == -1) {
|
|
|
|
perror("mmap");
|
|
|
|
exit(-1);
|
|
|
|
}
|
|
|
|
load_addr = error;
|
|
|
|
load_addr_set = 1;
|
|
|
|
}
|
|
|
|
|
2003-02-19 01:55:36 +03:00
|
|
|
eppnt = elf_phdata;
|
|
|
|
for(i=0; i<interp_elf_ex->e_phnum; i++, eppnt++)
|
|
|
|
if (eppnt->p_type == PT_LOAD) {
|
|
|
|
int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
|
|
|
|
int elf_prot = 0;
|
|
|
|
unsigned long vaddr = 0;
|
|
|
|
unsigned long k;
|
|
|
|
|
|
|
|
if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
|
|
|
|
if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
|
|
|
|
if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
|
|
|
|
if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) {
|
|
|
|
elf_type |= MAP_FIXED;
|
|
|
|
vaddr = eppnt->p_vaddr;
|
|
|
|
}
|
2003-05-13 04:25:15 +04:00
|
|
|
error = target_mmap(load_addr+TARGET_ELF_PAGESTART(vaddr),
|
|
|
|
eppnt->p_filesz + TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr),
|
2003-02-19 01:55:36 +03:00
|
|
|
elf_prot,
|
|
|
|
elf_type,
|
|
|
|
interpreter_fd,
|
2003-05-13 04:25:15 +04:00
|
|
|
eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr));
|
2003-02-19 01:55:36 +03:00
|
|
|
|
|
|
|
if (error > -1024UL) {
|
|
|
|
/* Real error */
|
|
|
|
close(interpreter_fd);
|
|
|
|
free(elf_phdata);
|
|
|
|
return ~0UL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
|
|
|
|
load_addr = error;
|
|
|
|
load_addr_set = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Find the end of the file mapping for this phdr, and keep
|
|
|
|
* track of the largest address we see for this.
|
|
|
|
*/
|
|
|
|
k = load_addr + eppnt->p_vaddr + eppnt->p_filesz;
|
|
|
|
if (k > elf_bss) elf_bss = k;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Do the same thing for the memory mapping - between
|
|
|
|
* elf_bss and last_bss is the bss section.
|
|
|
|
*/
|
|
|
|
k = load_addr + eppnt->p_memsz + eppnt->p_vaddr;
|
|
|
|
if (k > last_bss) last_bss = k;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Now use mmap to map the library into memory. */
|
|
|
|
|
|
|
|
close(interpreter_fd);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Now fill out the bss section. First pad the last page up
|
|
|
|
* to the page boundary, and then perform a mmap to make sure
|
|
|
|
* that there are zeromapped pages up to and including the last
|
|
|
|
* bss page.
|
|
|
|
*/
|
|
|
|
padzero(elf_bss);
|
2004-07-06 01:25:26 +04:00
|
|
|
elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */
|
2003-02-19 01:55:36 +03:00
|
|
|
|
|
|
|
/* Map the last of the bss segment */
|
|
|
|
if (last_bss > elf_bss) {
|
2003-05-13 04:25:15 +04:00
|
|
|
target_mmap(elf_bss, last_bss-elf_bss,
|
|
|
|
PROT_READ|PROT_WRITE|PROT_EXEC,
|
|
|
|
MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
|
2003-02-19 01:55:36 +03:00
|
|
|
}
|
|
|
|
free(elf_phdata);
|
|
|
|
|
|
|
|
*interp_load_addr = load_addr;
|
|
|
|
return ((unsigned long) interp_elf_ex->e_entry) + load_addr;
|
|
|
|
}
|
|
|
|
|
2003-04-30 00:40:07 +04:00
|
|
|
/* Best attempt to load symbols from this ELF object. */
|
|
|
|
static void load_symbols(struct elfhdr *hdr, int fd)
|
|
|
|
{
|
|
|
|
unsigned int i;
|
|
|
|
struct elf_shdr sechdr, symtab, strtab;
|
|
|
|
char *strings;
|
|
|
|
|
|
|
|
lseek(fd, hdr->e_shoff, SEEK_SET);
|
|
|
|
for (i = 0; i < hdr->e_shnum; i++) {
|
|
|
|
if (read(fd, &sechdr, sizeof(sechdr)) != sizeof(sechdr))
|
|
|
|
return;
|
|
|
|
#ifdef BSWAP_NEEDED
|
|
|
|
bswap_shdr(&sechdr);
|
|
|
|
#endif
|
|
|
|
if (sechdr.sh_type == SHT_SYMTAB) {
|
|
|
|
symtab = sechdr;
|
|
|
|
lseek(fd, hdr->e_shoff
|
|
|
|
+ sizeof(sechdr) * sechdr.sh_link, SEEK_SET);
|
|
|
|
if (read(fd, &strtab, sizeof(strtab))
|
|
|
|
!= sizeof(strtab))
|
|
|
|
return;
|
|
|
|
#ifdef BSWAP_NEEDED
|
|
|
|
bswap_shdr(&strtab);
|
|
|
|
#endif
|
|
|
|
goto found;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return; /* Shouldn't happen... */
|
|
|
|
|
|
|
|
found:
|
|
|
|
/* Now know where the strtab and symtab are. Snarf them. */
|
|
|
|
disas_symtab = malloc(symtab.sh_size);
|
|
|
|
disas_strtab = strings = malloc(strtab.sh_size);
|
|
|
|
if (!disas_symtab || !disas_strtab)
|
|
|
|
return;
|
|
|
|
|
|
|
|
lseek(fd, symtab.sh_offset, SEEK_SET);
|
|
|
|
if (read(fd, disas_symtab, symtab.sh_size) != symtab.sh_size)
|
|
|
|
return;
|
2003-02-19 01:55:36 +03:00
|
|
|
|
2003-04-30 00:40:07 +04:00
|
|
|
#ifdef BSWAP_NEEDED
|
|
|
|
for (i = 0; i < symtab.sh_size / sizeof(struct elf_sym); i++)
|
|
|
|
bswap_sym(disas_symtab + sizeof(struct elf_sym)*i);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
lseek(fd, strtab.sh_offset, SEEK_SET);
|
|
|
|
if (read(fd, strings, strtab.sh_size) != strtab.sh_size)
|
|
|
|
return;
|
|
|
|
disas_num_syms = symtab.sh_size / sizeof(struct elf_sym);
|
|
|
|
}
|
2003-02-19 01:55:36 +03:00
|
|
|
|
2003-02-19 02:32:15 +03:00
|
|
|
static int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
|
|
|
|
struct image_info * info)
|
2003-02-19 01:55:36 +03:00
|
|
|
{
|
|
|
|
struct elfhdr elf_ex;
|
|
|
|
struct elfhdr interp_elf_ex;
|
|
|
|
struct exec interp_ex;
|
|
|
|
int interpreter_fd = -1; /* avoid warning */
|
2003-04-10 04:03:40 +04:00
|
|
|
unsigned long load_addr, load_bias;
|
2003-02-19 01:55:36 +03:00
|
|
|
int load_addr_set = 0;
|
|
|
|
unsigned int interpreter_type = INTERPRETER_NONE;
|
|
|
|
unsigned char ibcs2_interpreter;
|
|
|
|
int i;
|
2003-05-13 04:25:15 +04:00
|
|
|
unsigned long mapped_addr;
|
2003-02-19 01:55:36 +03:00
|
|
|
struct elf_phdr * elf_ppnt;
|
|
|
|
struct elf_phdr *elf_phdata;
|
|
|
|
unsigned long elf_bss, k, elf_brk;
|
|
|
|
int retval;
|
|
|
|
char * elf_interpreter;
|
|
|
|
unsigned long elf_entry, interp_load_addr = 0;
|
|
|
|
int status;
|
|
|
|
unsigned long start_code, end_code, end_data;
|
|
|
|
unsigned long elf_stack;
|
|
|
|
char passed_fileno[6];
|
|
|
|
|
|
|
|
ibcs2_interpreter = 0;
|
|
|
|
status = 0;
|
|
|
|
load_addr = 0;
|
2003-04-10 04:03:40 +04:00
|
|
|
load_bias = 0;
|
2003-02-19 01:55:36 +03:00
|
|
|
elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */
|
|
|
|
#ifdef BSWAP_NEEDED
|
|
|
|
bswap_ehdr(&elf_ex);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
if (elf_ex.e_ident[0] != 0x7f ||
|
|
|
|
strncmp(&elf_ex.e_ident[1], "ELF",3) != 0) {
|
|
|
|
return -ENOEXEC;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* First of all, some simple consistency checks */
|
|
|
|
if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||
|
|
|
|
(! elf_check_arch(elf_ex.e_machine))) {
|
|
|
|
return -ENOEXEC;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Now read in all of the header information */
|
|
|
|
elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum);
|
|
|
|
if (elf_phdata == NULL) {
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
retval = lseek(bprm->fd, elf_ex.e_phoff, SEEK_SET);
|
|
|
|
if(retval > 0) {
|
|
|
|
retval = read(bprm->fd, (char *) elf_phdata,
|
|
|
|
elf_ex.e_phentsize * elf_ex.e_phnum);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (retval < 0) {
|
|
|
|
perror("load_elf_binary");
|
|
|
|
exit(-1);
|
|
|
|
free (elf_phdata);
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
2003-02-19 02:32:15 +03:00
|
|
|
#ifdef BSWAP_NEEDED
|
|
|
|
elf_ppnt = elf_phdata;
|
|
|
|
for (i=0; i<elf_ex.e_phnum; i++, elf_ppnt++) {
|
|
|
|
bswap_phdr(elf_ppnt);
|
|
|
|
}
|
|
|
|
#endif
|
2003-02-19 01:55:36 +03:00
|
|
|
elf_ppnt = elf_phdata;
|
|
|
|
|
|
|
|
elf_bss = 0;
|
|
|
|
elf_brk = 0;
|
|
|
|
|
|
|
|
|
|
|
|
elf_stack = ~0UL;
|
|
|
|
elf_interpreter = NULL;
|
|
|
|
start_code = ~0UL;
|
|
|
|
end_code = 0;
|
|
|
|
end_data = 0;
|
|
|
|
|
|
|
|
for(i=0;i < elf_ex.e_phnum; i++) {
|
|
|
|
if (elf_ppnt->p_type == PT_INTERP) {
|
|
|
|
if ( elf_interpreter != NULL )
|
|
|
|
{
|
|
|
|
free (elf_phdata);
|
|
|
|
free(elf_interpreter);
|
|
|
|
close(bprm->fd);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* This is the program interpreter used for
|
|
|
|
* shared libraries - for now assume that this
|
|
|
|
* is an a.out format binary
|
|
|
|
*/
|
|
|
|
|
2003-04-11 04:16:16 +04:00
|
|
|
elf_interpreter = (char *)malloc(elf_ppnt->p_filesz);
|
2003-02-19 01:55:36 +03:00
|
|
|
|
|
|
|
if (elf_interpreter == NULL) {
|
|
|
|
free (elf_phdata);
|
|
|
|
close(bprm->fd);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
retval = lseek(bprm->fd, elf_ppnt->p_offset, SEEK_SET);
|
|
|
|
if(retval >= 0) {
|
2003-04-11 04:16:16 +04:00
|
|
|
retval = read(bprm->fd, elf_interpreter, elf_ppnt->p_filesz);
|
2003-02-19 01:55:36 +03:00
|
|
|
}
|
|
|
|
if(retval < 0) {
|
|
|
|
perror("load_elf_binary2");
|
|
|
|
exit(-1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If the program interpreter is one of these two,
|
|
|
|
then assume an iBCS2 image. Otherwise assume
|
|
|
|
a native linux image. */
|
|
|
|
|
|
|
|
/* JRP - Need to add X86 lib dir stuff here... */
|
|
|
|
|
|
|
|
if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 ||
|
|
|
|
strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0) {
|
|
|
|
ibcs2_interpreter = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
#if 0
|
|
|
|
printf("Using ELF interpreter %s\n", elf_interpreter);
|
|
|
|
#endif
|
|
|
|
if (retval >= 0) {
|
2003-04-11 04:16:16 +04:00
|
|
|
retval = open(path(elf_interpreter), O_RDONLY);
|
2003-02-19 01:55:36 +03:00
|
|
|
if(retval >= 0) {
|
|
|
|
interpreter_fd = retval;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
perror(elf_interpreter);
|
|
|
|
exit(-1);
|
|
|
|
/* retval = -errno; */
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (retval >= 0) {
|
|
|
|
retval = lseek(interpreter_fd, 0, SEEK_SET);
|
|
|
|
if(retval >= 0) {
|
|
|
|
retval = read(interpreter_fd,bprm->buf,128);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (retval >= 0) {
|
|
|
|
interp_ex = *((struct exec *) bprm->buf); /* aout exec-header */
|
|
|
|
interp_elf_ex=*((struct elfhdr *) bprm->buf); /* elf exec-header */
|
|
|
|
}
|
|
|
|
if (retval < 0) {
|
|
|
|
perror("load_elf_binary3");
|
|
|
|
exit(-1);
|
|
|
|
free (elf_phdata);
|
|
|
|
free(elf_interpreter);
|
|
|
|
close(bprm->fd);
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
elf_ppnt++;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Some simple consistency checks for the interpreter */
|
|
|
|
if (elf_interpreter){
|
|
|
|
interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT;
|
|
|
|
|
|
|
|
/* Now figure out which format our binary is */
|
|
|
|
if ((N_MAGIC(interp_ex) != OMAGIC) && (N_MAGIC(interp_ex) != ZMAGIC) &&
|
|
|
|
(N_MAGIC(interp_ex) != QMAGIC)) {
|
|
|
|
interpreter_type = INTERPRETER_ELF;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (interp_elf_ex.e_ident[0] != 0x7f ||
|
|
|
|
strncmp(&interp_elf_ex.e_ident[1], "ELF",3) != 0) {
|
|
|
|
interpreter_type &= ~INTERPRETER_ELF;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!interpreter_type) {
|
|
|
|
free(elf_interpreter);
|
|
|
|
free(elf_phdata);
|
|
|
|
close(bprm->fd);
|
|
|
|
return -ELIBBAD;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* OK, we are done with that, now set up the arg stuff,
|
|
|
|
and then start this sucker up */
|
|
|
|
|
|
|
|
if (!bprm->sh_bang) {
|
|
|
|
char * passed_p;
|
|
|
|
|
|
|
|
if (interpreter_type == INTERPRETER_AOUT) {
|
2004-06-19 21:23:39 +04:00
|
|
|
snprintf(passed_fileno, sizeof(passed_fileno), "%d", bprm->fd);
|
2003-02-19 01:55:36 +03:00
|
|
|
passed_p = passed_fileno;
|
|
|
|
|
|
|
|
if (elf_interpreter) {
|
|
|
|
bprm->p = copy_strings(1,&passed_p,bprm->page,bprm->p);
|
|
|
|
bprm->argc++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!bprm->p) {
|
|
|
|
if (elf_interpreter) {
|
|
|
|
free(elf_interpreter);
|
|
|
|
}
|
|
|
|
free (elf_phdata);
|
|
|
|
close(bprm->fd);
|
|
|
|
return -E2BIG;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* OK, This is the point of no return */
|
|
|
|
info->end_data = 0;
|
|
|
|
info->end_code = 0;
|
|
|
|
info->start_mmap = (unsigned long)ELF_START_MMAP;
|
|
|
|
info->mmap = 0;
|
|
|
|
elf_entry = (unsigned long) elf_ex.e_entry;
|
|
|
|
|
|
|
|
/* Do this so that we can load the interpreter, if need be. We will
|
|
|
|
change some of these later */
|
|
|
|
info->rss = 0;
|
|
|
|
bprm->p = setup_arg_pages(bprm->p, bprm, info);
|
|
|
|
info->start_stack = bprm->p;
|
|
|
|
|
|
|
|
/* Now we do a little grungy work by mmaping the ELF image into
|
|
|
|
* the correct location in memory. At this point, we assume that
|
|
|
|
* the image should be loaded at fixed address, not at a variable
|
|
|
|
* address.
|
|
|
|
*/
|
|
|
|
|
|
|
|
for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) {
|
2003-04-10 04:03:40 +04:00
|
|
|
int elf_prot = 0;
|
|
|
|
int elf_flags = 0;
|
|
|
|
unsigned long error;
|
|
|
|
|
|
|
|
if (elf_ppnt->p_type != PT_LOAD)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
|
|
|
|
if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
|
|
|
|
if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
|
|
|
|
elf_flags = MAP_PRIVATE | MAP_DENYWRITE;
|
|
|
|
if (elf_ex.e_type == ET_EXEC || load_addr_set) {
|
|
|
|
elf_flags |= MAP_FIXED;
|
|
|
|
} else if (elf_ex.e_type == ET_DYN) {
|
|
|
|
/* Try and get dynamic programs out of the way of the default mmap
|
|
|
|
base, as well as whatever program they might try to exec. This
|
|
|
|
is because the brk will follow the loader, and is not movable. */
|
|
|
|
/* NOTE: for qemu, we do a big mmap to get enough space
|
|
|
|
without harcoding any address */
|
2003-05-13 04:25:15 +04:00
|
|
|
error = target_mmap(0, ET_DYN_MAP_SIZE,
|
|
|
|
PROT_NONE, MAP_PRIVATE | MAP_ANON,
|
|
|
|
-1, 0);
|
2003-04-10 04:03:40 +04:00
|
|
|
if (error == -1) {
|
|
|
|
perror("mmap");
|
|
|
|
exit(-1);
|
|
|
|
}
|
2003-05-13 04:25:15 +04:00
|
|
|
load_bias = TARGET_ELF_PAGESTART(error - elf_ppnt->p_vaddr);
|
2003-04-10 04:03:40 +04:00
|
|
|
}
|
|
|
|
|
2003-05-13 04:25:15 +04:00
|
|
|
error = target_mmap(TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr),
|
|
|
|
(elf_ppnt->p_filesz +
|
|
|
|
TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)),
|
|
|
|
elf_prot,
|
|
|
|
(MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE),
|
|
|
|
bprm->fd,
|
|
|
|
(elf_ppnt->p_offset -
|
|
|
|
TARGET_ELF_PAGEOFFSET(elf_ppnt->p_vaddr)));
|
2003-04-10 04:03:40 +04:00
|
|
|
if (error == -1) {
|
|
|
|
perror("mmap");
|
|
|
|
exit(-1);
|
|
|
|
}
|
2003-02-19 01:55:36 +03:00
|
|
|
|
|
|
|
#ifdef LOW_ELF_STACK
|
2003-05-13 04:25:15 +04:00
|
|
|
if (TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
|
|
|
|
elf_stack = TARGET_ELF_PAGESTART(elf_ppnt->p_vaddr);
|
2003-02-19 01:55:36 +03:00
|
|
|
#endif
|
2003-04-10 04:03:40 +04:00
|
|
|
|
|
|
|
if (!load_addr_set) {
|
|
|
|
load_addr_set = 1;
|
|
|
|
load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset;
|
|
|
|
if (elf_ex.e_type == ET_DYN) {
|
|
|
|
load_bias += error -
|
2003-05-13 04:25:15 +04:00
|
|
|
TARGET_ELF_PAGESTART(load_bias + elf_ppnt->p_vaddr);
|
2003-04-10 04:03:40 +04:00
|
|
|
load_addr += load_bias;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
k = elf_ppnt->p_vaddr;
|
|
|
|
if (k < start_code)
|
|
|
|
start_code = k;
|
|
|
|
k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz;
|
|
|
|
if (k > elf_bss)
|
|
|
|
elf_bss = k;
|
|
|
|
if ((elf_ppnt->p_flags & PF_X) && end_code < k)
|
|
|
|
end_code = k;
|
|
|
|
if (end_data < k)
|
|
|
|
end_data = k;
|
|
|
|
k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz;
|
|
|
|
if (k > elf_brk) elf_brk = k;
|
2003-02-19 01:55:36 +03:00
|
|
|
}
|
|
|
|
|
2003-04-10 04:03:40 +04:00
|
|
|
elf_entry += load_bias;
|
|
|
|
elf_bss += load_bias;
|
|
|
|
elf_brk += load_bias;
|
|
|
|
start_code += load_bias;
|
|
|
|
end_code += load_bias;
|
|
|
|
// start_data += load_bias;
|
|
|
|
end_data += load_bias;
|
|
|
|
|
2003-02-19 01:55:36 +03:00
|
|
|
if (elf_interpreter) {
|
|
|
|
if (interpreter_type & 1) {
|
|
|
|
elf_entry = load_aout_interp(&interp_ex, interpreter_fd);
|
|
|
|
}
|
|
|
|
else if (interpreter_type & 2) {
|
|
|
|
elf_entry = load_elf_interp(&interp_elf_ex, interpreter_fd,
|
|
|
|
&interp_load_addr);
|
|
|
|
}
|
|
|
|
|
|
|
|
close(interpreter_fd);
|
|
|
|
free(elf_interpreter);
|
|
|
|
|
|
|
|
if (elf_entry == ~0UL) {
|
|
|
|
printf("Unable to load interpreter\n");
|
|
|
|
free(elf_phdata);
|
|
|
|
exit(-1);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
free(elf_phdata);
|
|
|
|
|
2003-04-30 00:40:07 +04:00
|
|
|
if (loglevel)
|
|
|
|
load_symbols(&elf_ex, bprm->fd);
|
|
|
|
|
2003-02-19 01:55:36 +03:00
|
|
|
if (interpreter_type != INTERPRETER_AOUT) close(bprm->fd);
|
|
|
|
info->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX);
|
|
|
|
|
|
|
|
#ifdef LOW_ELF_STACK
|
|
|
|
info->start_stack = bprm->p = elf_stack - 4;
|
|
|
|
#endif
|
|
|
|
bprm->p = (unsigned long)
|
|
|
|
create_elf_tables((char *)bprm->p,
|
|
|
|
bprm->argc,
|
|
|
|
bprm->envc,
|
2003-07-09 21:13:37 +04:00
|
|
|
&elf_ex,
|
2003-04-10 04:03:40 +04:00
|
|
|
load_addr, load_bias,
|
2003-02-19 01:55:36 +03:00
|
|
|
interp_load_addr,
|
|
|
|
(interpreter_type == INTERPRETER_AOUT ? 0 : 1),
|
|
|
|
info);
|
|
|
|
if (interpreter_type == INTERPRETER_AOUT)
|
|
|
|
info->arg_start += strlen(passed_fileno) + 1;
|
|
|
|
info->start_brk = info->brk = elf_brk;
|
|
|
|
info->end_code = end_code;
|
|
|
|
info->start_code = start_code;
|
|
|
|
info->end_data = end_data;
|
|
|
|
info->start_stack = bprm->p;
|
|
|
|
|
|
|
|
/* Calling set_brk effectively mmaps the pages that we need for the bss and break
|
|
|
|
sections */
|
|
|
|
set_brk(elf_bss, elf_brk);
|
|
|
|
|
|
|
|
padzero(elf_bss);
|
|
|
|
|
|
|
|
#if 0
|
|
|
|
printf("(start_brk) %x\n" , info->start_brk);
|
|
|
|
printf("(end_code) %x\n" , info->end_code);
|
|
|
|
printf("(start_code) %x\n" , info->start_code);
|
|
|
|
printf("(end_data) %x\n" , info->end_data);
|
|
|
|
printf("(start_stack) %x\n" , info->start_stack);
|
|
|
|
printf("(brk) %x\n" , info->brk);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
if ( info->personality == PER_SVR4 )
|
|
|
|
{
|
|
|
|
/* Why this, you ask??? Well SVr4 maps page 0 as read-only,
|
|
|
|
and some applications "depend" upon this behavior.
|
|
|
|
Since we do not have the power to recompile these, we
|
|
|
|
emulate the SVr4 behavior. Sigh. */
|
2004-07-06 01:25:26 +04:00
|
|
|
mapped_addr = target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
|
2003-05-13 04:25:15 +04:00
|
|
|
MAP_FIXED | MAP_PRIVATE, -1, 0);
|
2003-02-19 01:55:36 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef ELF_PLAT_INIT
|
|
|
|
/*
|
|
|
|
* The ABI may specify that certain registers be set up in special
|
|
|
|
* ways (on i386 %edx is the address of a DT_FINI function, for
|
|
|
|
* example. This macro performs whatever initialization to
|
|
|
|
* the regs structure is required.
|
|
|
|
*/
|
|
|
|
ELF_PLAT_INIT(regs);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
|
|
info->entry = elf_entry;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
2003-04-11 04:16:16 +04:00
|
|
|
int elf_exec(const char * filename, char ** argv, char ** envp,
|
2003-02-19 02:32:15 +03:00
|
|
|
struct target_pt_regs * regs, struct image_info *infop)
|
2003-02-19 01:55:36 +03:00
|
|
|
{
|
|
|
|
struct linux_binprm bprm;
|
|
|
|
int retval;
|
|
|
|
int i;
|
|
|
|
|
2003-05-13 04:25:15 +04:00
|
|
|
bprm.p = TARGET_PAGE_SIZE*MAX_ARG_PAGES-sizeof(unsigned int);
|
2003-02-19 01:55:36 +03:00
|
|
|
for (i=0 ; i<MAX_ARG_PAGES ; i++) /* clear page-table */
|
|
|
|
bprm.page[i] = 0;
|
|
|
|
retval = open(filename, O_RDONLY);
|
2004-01-19 01:55:23 +03:00
|
|
|
if (retval < 0)
|
|
|
|
return retval;
|
|
|
|
bprm.fd = retval;
|
2003-02-19 01:55:36 +03:00
|
|
|
bprm.filename = (char *)filename;
|
|
|
|
bprm.sh_bang = 0;
|
|
|
|
bprm.loader = 0;
|
|
|
|
bprm.exec = 0;
|
|
|
|
bprm.dont_iput = 0;
|
|
|
|
bprm.argc = count(argv);
|
|
|
|
bprm.envc = count(envp);
|
|
|
|
|
|
|
|
retval = prepare_binprm(&bprm);
|
|
|
|
|
|
|
|
if(retval>=0) {
|
|
|
|
bprm.p = copy_strings(1, &bprm.filename, bprm.page, bprm.p);
|
|
|
|
bprm.exec = bprm.p;
|
|
|
|
bprm.p = copy_strings(bprm.envc,envp,bprm.page,bprm.p);
|
|
|
|
bprm.p = copy_strings(bprm.argc,argv,bprm.page,bprm.p);
|
|
|
|
if (!bprm.p) {
|
|
|
|
retval = -E2BIG;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if(retval>=0) {
|
|
|
|
retval = load_elf_binary(&bprm,regs,infop);
|
|
|
|
}
|
|
|
|
if(retval>=0) {
|
|
|
|
/* success. Initialize important registers */
|
2003-06-16 00:05:50 +04:00
|
|
|
init_thread(regs, infop);
|
2003-02-19 01:55:36 +03:00
|
|
|
return retval;
|
|
|
|
}
|
|
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/* Something went wrong, return the inode and free the argument pages*/
|
|
|
|
for (i=0 ; i<MAX_ARG_PAGES ; i++) {
|
|
|
|
free_page((void *)bprm.page[i]);
|
|
|
|
}
|
|
|
|
return(retval);
|
|
|
|
}
|
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|
|
static int load_aout_interp(void * exptr, int interp_fd)
|
|
|
|
{
|
|
|
|
printf("a.out interpreter not yet supported\n");
|
|
|
|
return(0);
|
|
|
|
}
|
|
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|
|