2db55d344e
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
320 lines
8 KiB
C
320 lines
8 KiB
C
/*
|
|
* Written 2000,2002 by Andi Kleen.
|
|
*
|
|
* Loosely based on the sparc64 and IA64 32bit emulation loaders.
|
|
* This tricks binfmt_elf.c into loading 32bit binaries using lots
|
|
* of ugly preprocessor tricks. Talk about very very poor man's inheritance.
|
|
*/
|
|
#define __ASM_X86_64_ELF_H 1
|
|
|
|
#undef ELF_CLASS
|
|
#define ELF_CLASS ELFCLASS32
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/string.h>
|
|
#include <linux/binfmts.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/security.h>
|
|
|
|
#include <asm/segment.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/user32.h>
|
|
#include <asm/sigcontext32.h>
|
|
#include <asm/fpu32.h>
|
|
#include <asm/i387.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/ia32.h>
|
|
#include <asm/vsyscall32.h>
|
|
|
|
#define ELF_NAME "elf/i386"
|
|
|
|
#define AT_SYSINFO 32
|
|
#define AT_SYSINFO_EHDR 33
|
|
|
|
int sysctl_vsyscall32 = 1;
|
|
|
|
#undef ARCH_DLINFO
|
|
#define ARCH_DLINFO do { \
|
|
if (sysctl_vsyscall32) { \
|
|
current->mm->context.vdso = (void *)VSYSCALL32_BASE; \
|
|
NEW_AUX_ENT(AT_SYSINFO, (u32)(u64)VSYSCALL32_VSYSCALL); \
|
|
NEW_AUX_ENT(AT_SYSINFO_EHDR, VSYSCALL32_BASE); \
|
|
} \
|
|
} while(0)
|
|
|
|
struct file;
|
|
struct elf_phdr;
|
|
|
|
#define IA32_EMULATOR 1
|
|
|
|
#define ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)
|
|
|
|
#undef ELF_ARCH
|
|
#define ELF_ARCH EM_386
|
|
|
|
#define ELF_DATA ELFDATA2LSB
|
|
|
|
#define USE_ELF_CORE_DUMP 1
|
|
|
|
/* Override elfcore.h */
|
|
#define _LINUX_ELFCORE_H 1
|
|
typedef unsigned int elf_greg_t;
|
|
|
|
#define ELF_NGREG (sizeof (struct user_regs_struct32) / sizeof(elf_greg_t))
|
|
typedef elf_greg_t elf_gregset_t[ELF_NGREG];
|
|
|
|
struct elf_siginfo
|
|
{
|
|
int si_signo; /* signal number */
|
|
int si_code; /* extra code */
|
|
int si_errno; /* errno */
|
|
};
|
|
|
|
#define jiffies_to_timeval(a,b) do { (b)->tv_usec = 0; (b)->tv_sec = (a)/HZ; }while(0)
|
|
|
|
struct elf_prstatus
|
|
{
|
|
struct elf_siginfo pr_info; /* Info associated with signal */
|
|
short pr_cursig; /* Current signal */
|
|
unsigned int pr_sigpend; /* Set of pending signals */
|
|
unsigned int pr_sighold; /* Set of held signals */
|
|
pid_t pr_pid;
|
|
pid_t pr_ppid;
|
|
pid_t pr_pgrp;
|
|
pid_t pr_sid;
|
|
struct compat_timeval pr_utime; /* User time */
|
|
struct compat_timeval pr_stime; /* System time */
|
|
struct compat_timeval pr_cutime; /* Cumulative user time */
|
|
struct compat_timeval pr_cstime; /* Cumulative system time */
|
|
elf_gregset_t pr_reg; /* GP registers */
|
|
int pr_fpvalid; /* True if math co-processor being used. */
|
|
};
|
|
|
|
#define ELF_PRARGSZ (80) /* Number of chars for args */
|
|
|
|
struct elf_prpsinfo
|
|
{
|
|
char pr_state; /* numeric process state */
|
|
char pr_sname; /* char for pr_state */
|
|
char pr_zomb; /* zombie */
|
|
char pr_nice; /* nice val */
|
|
unsigned int pr_flag; /* flags */
|
|
__u16 pr_uid;
|
|
__u16 pr_gid;
|
|
pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
|
|
/* Lots missing */
|
|
char pr_fname[16]; /* filename of executable */
|
|
char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
|
|
};
|
|
|
|
#define __STR(x) #x
|
|
#define STR(x) __STR(x)
|
|
|
|
#define _GET_SEG(x) \
|
|
({ __u32 seg; asm("movl %%" STR(x) ",%0" : "=r"(seg)); seg; })
|
|
|
|
/* Assumes current==process to be dumped */
|
|
#define ELF_CORE_COPY_REGS(pr_reg, regs) \
|
|
pr_reg[0] = regs->rbx; \
|
|
pr_reg[1] = regs->rcx; \
|
|
pr_reg[2] = regs->rdx; \
|
|
pr_reg[3] = regs->rsi; \
|
|
pr_reg[4] = regs->rdi; \
|
|
pr_reg[5] = regs->rbp; \
|
|
pr_reg[6] = regs->rax; \
|
|
pr_reg[7] = _GET_SEG(ds); \
|
|
pr_reg[8] = _GET_SEG(es); \
|
|
pr_reg[9] = _GET_SEG(fs); \
|
|
pr_reg[10] = _GET_SEG(gs); \
|
|
pr_reg[11] = regs->orig_rax; \
|
|
pr_reg[12] = regs->rip; \
|
|
pr_reg[13] = regs->cs; \
|
|
pr_reg[14] = regs->eflags; \
|
|
pr_reg[15] = regs->rsp; \
|
|
pr_reg[16] = regs->ss;
|
|
|
|
#define user user32
|
|
|
|
#undef elf_read_implies_exec
|
|
#define elf_read_implies_exec(ex, executable_stack) (executable_stack != EXSTACK_DISABLE_X)
|
|
//#include <asm/ia32.h>
|
|
#include <linux/elf.h>
|
|
|
|
typedef struct user_i387_ia32_struct elf_fpregset_t;
|
|
typedef struct user32_fxsr_struct elf_fpxregset_t;
|
|
|
|
|
|
static inline void elf_core_copy_regs(elf_gregset_t *elfregs, struct pt_regs *regs)
|
|
{
|
|
ELF_CORE_COPY_REGS((*elfregs), regs)
|
|
}
|
|
|
|
static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t* elfregs)
|
|
{
|
|
struct pt_regs *pp = task_pt_regs(t);
|
|
ELF_CORE_COPY_REGS((*elfregs), pp);
|
|
/* fix wrong segments */
|
|
(*elfregs)[7] = t->thread.ds;
|
|
(*elfregs)[9] = t->thread.fsindex;
|
|
(*elfregs)[10] = t->thread.gsindex;
|
|
(*elfregs)[8] = t->thread.es;
|
|
return 1;
|
|
}
|
|
|
|
static inline int
|
|
elf_core_copy_task_fpregs(struct task_struct *tsk, struct pt_regs *regs, elf_fpregset_t *fpu)
|
|
{
|
|
struct _fpstate_ia32 *fpstate = (void*)fpu;
|
|
mm_segment_t oldfs = get_fs();
|
|
|
|
if (!tsk_used_math(tsk))
|
|
return 0;
|
|
if (!regs)
|
|
regs = task_pt_regs(tsk);
|
|
if (tsk == current)
|
|
unlazy_fpu(tsk);
|
|
set_fs(KERNEL_DS);
|
|
save_i387_ia32(tsk, fpstate, regs, 1);
|
|
/* Correct for i386 bug. It puts the fop into the upper 16bits of
|
|
the tag word (like FXSAVE), not into the fcs*/
|
|
fpstate->cssel |= fpstate->tag & 0xffff0000;
|
|
set_fs(oldfs);
|
|
return 1;
|
|
}
|
|
|
|
#define ELF_CORE_COPY_XFPREGS 1
|
|
static inline int
|
|
elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t *xfpu)
|
|
{
|
|
struct pt_regs *regs = task_pt_regs(t);
|
|
if (!tsk_used_math(t))
|
|
return 0;
|
|
if (t == current)
|
|
unlazy_fpu(t);
|
|
memcpy(xfpu, &t->thread.i387.fxsave, sizeof(elf_fpxregset_t));
|
|
xfpu->fcs = regs->cs;
|
|
xfpu->fos = t->thread.ds; /* right? */
|
|
return 1;
|
|
}
|
|
|
|
#undef elf_check_arch
|
|
#define elf_check_arch(x) \
|
|
((x)->e_machine == EM_386)
|
|
|
|
extern int force_personality32;
|
|
|
|
#define ELF_EXEC_PAGESIZE PAGE_SIZE
|
|
#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
|
|
#define ELF_PLATFORM ("i686")
|
|
#define SET_PERSONALITY(ex, ibcs2) \
|
|
do { \
|
|
unsigned long new_flags = 0; \
|
|
if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \
|
|
new_flags = _TIF_IA32; \
|
|
if ((current_thread_info()->flags & _TIF_IA32) \
|
|
!= new_flags) \
|
|
set_thread_flag(TIF_ABI_PENDING); \
|
|
else \
|
|
clear_thread_flag(TIF_ABI_PENDING); \
|
|
/* XXX This overwrites the user set personality */ \
|
|
current->personality |= force_personality32; \
|
|
} while (0)
|
|
|
|
/* Override some function names */
|
|
#define elf_format elf32_format
|
|
|
|
#define init_elf_binfmt init_elf32_binfmt
|
|
#define exit_elf_binfmt exit_elf32_binfmt
|
|
|
|
#define load_elf_binary load_elf32_binary
|
|
|
|
#define ELF_PLAT_INIT(r, load_addr) elf32_init(r)
|
|
|
|
#undef start_thread
|
|
#define start_thread(regs,new_rip,new_rsp) do { \
|
|
asm volatile("movl %0,%%fs" :: "r" (0)); \
|
|
asm volatile("movl %0,%%es; movl %0,%%ds": :"r" (__USER32_DS)); \
|
|
load_gs_index(0); \
|
|
(regs)->rip = (new_rip); \
|
|
(regs)->rsp = (new_rsp); \
|
|
(regs)->eflags = 0x200; \
|
|
(regs)->cs = __USER32_CS; \
|
|
(regs)->ss = __USER32_DS; \
|
|
set_fs(USER_DS); \
|
|
} while(0)
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
MODULE_DESCRIPTION("Binary format loader for compatibility with IA32 ELF binaries.");
|
|
MODULE_AUTHOR("Eric Youngdale, Andi Kleen");
|
|
|
|
#undef MODULE_DESCRIPTION
|
|
#undef MODULE_AUTHOR
|
|
|
|
static void elf32_init(struct pt_regs *);
|
|
|
|
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
|
|
#define arch_setup_additional_pages syscall32_setup_pages
|
|
extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
|
|
|
|
#include "../../../fs/binfmt_elf.c"
|
|
|
|
static void elf32_init(struct pt_regs *regs)
|
|
{
|
|
struct task_struct *me = current;
|
|
regs->rdi = 0;
|
|
regs->rsi = 0;
|
|
regs->rdx = 0;
|
|
regs->rcx = 0;
|
|
regs->rax = 0;
|
|
regs->rbx = 0;
|
|
regs->rbp = 0;
|
|
regs->r8 = regs->r9 = regs->r10 = regs->r11 = regs->r12 =
|
|
regs->r13 = regs->r14 = regs->r15 = 0;
|
|
me->thread.fs = 0;
|
|
me->thread.gs = 0;
|
|
me->thread.fsindex = 0;
|
|
me->thread.gsindex = 0;
|
|
me->thread.ds = __USER_DS;
|
|
me->thread.es = __USER_DS;
|
|
}
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
/* Register vsyscall32 into the ABI table */
|
|
#include <linux/sysctl.h>
|
|
|
|
static ctl_table abi_table2[] = {
|
|
{
|
|
.ctl_name = 99,
|
|
.procname = "vsyscall32",
|
|
.data = &sysctl_vsyscall32,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
{}
|
|
};
|
|
|
|
static ctl_table abi_root_table2[] = {
|
|
{
|
|
.ctl_name = CTL_ABI,
|
|
.procname = "abi",
|
|
.mode = 0555,
|
|
.child = abi_table2
|
|
},
|
|
{}
|
|
};
|
|
|
|
static __init int ia32_binfmt_init(void)
|
|
{
|
|
register_sysctl_table(abi_root_table2);
|
|
return 0;
|
|
}
|
|
__initcall(ia32_binfmt_init);
|
|
#endif
|