mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-15 05:11:32 +00:00
x86: compat_binfmt_elf
This switches x86-64's 32-bit ELF support to use the shared fs/compat_binfmt_elf.c code instead of our own ia32_binfmt.c. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Roland McGrath
Ingo Molnar
parent
60b3b9af35
commit
a97f52e678
@ -1532,6 +1532,7 @@ source "fs/Kconfig.binfmt"
|
||||
config IA32_EMULATION
|
||||
bool "IA32 Emulation"
|
||||
depends on X86_64
|
||||
select COMPAT_BINFMT_ELF
|
||||
help
|
||||
Include code to run 32-bit programs under a 64-bit kernel. You should
|
||||
likely turn this on, unless you're 100% sure that you don't have any
|
||||
|
||||
@ -2,8 +2,7 @@
|
||||
# Makefile for the ia32 kernel emulation subsystem.
|
||||
#
|
||||
|
||||
obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o \
|
||||
ia32_binfmt.o
|
||||
obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o
|
||||
|
||||
sysv-$(CONFIG_SYSVIPC) := ipc32.o
|
||||
obj-$(CONFIG_IA32_EMULATION) += $(sysv-y)
|
||||
|
||||
@ -377,6 +377,39 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int exstack)
|
||||
|
||||
__initcall(sysenter_setup);
|
||||
|
||||
#ifdef CONFIG_SYSCTL
|
||||
/* Register vsyscall32 into the ABI table */
|
||||
#include <linux/sysctl.h>
|
||||
|
||||
static ctl_table abi_table2[] = {
|
||||
{
|
||||
.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
|
||||
|
||||
#else /* CONFIG_X86_32 */
|
||||
|
||||
const char *arch_vma_name(struct vm_area_struct *vma)
|
||||
|
||||
@ -73,6 +73,9 @@ typedef struct user_fxsr_struct elf_fpxregset_t;
|
||||
#endif
|
||||
|
||||
#ifdef __KERNEL__
|
||||
#include <asm/vdso.h>
|
||||
|
||||
extern unsigned int vdso_enabled;
|
||||
|
||||
/*
|
||||
* This is used to ensure we don't load something for the wrong architecture.
|
||||
@ -84,7 +87,6 @@ typedef struct user_fxsr_struct elf_fpxregset_t;
|
||||
#include <asm/processor.h>
|
||||
#include <asm/system.h> /* for savesegment */
|
||||
#include <asm/desc.h>
|
||||
#include <asm/vdso.h>
|
||||
|
||||
#define elf_check_arch(x) elf_check_arch_ia32(x)
|
||||
|
||||
@ -106,7 +108,6 @@ typedef struct user_fxsr_struct elf_fpxregset_t;
|
||||
|
||||
#define ELF_PLATFORM (utsname()->machine)
|
||||
#define set_personality_64bit() do { } while (0)
|
||||
extern unsigned int vdso_enabled;
|
||||
|
||||
#else /* CONFIG_X86_32 */
|
||||
|
||||
@ -118,29 +119,57 @@ extern unsigned int vdso_enabled;
|
||||
#define elf_check_arch(x) \
|
||||
((x)->e_machine == EM_X86_64)
|
||||
|
||||
#define compat_elf_check_arch(x) elf_check_arch_ia32(x)
|
||||
|
||||
static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp)
|
||||
{
|
||||
asm volatile("movl %0,%%fs" :: "r" (0));
|
||||
asm volatile("movl %0,%%es; movl %0,%%ds" : : "r" (__USER32_DS));
|
||||
load_gs_index(0);
|
||||
regs->ip = ip;
|
||||
regs->sp = sp;
|
||||
regs->flags = X86_EFLAGS_IF;
|
||||
regs->cs = __USER32_CS;
|
||||
regs->ss = __USER32_DS;
|
||||
}
|
||||
|
||||
static inline void elf_common_init(struct thread_struct *t,
|
||||
struct pt_regs *regs, const u16 ds)
|
||||
{
|
||||
regs->ax = regs->bx = regs->cx = regs->dx = 0;
|
||||
regs->si = regs->di = regs->bp = 0;
|
||||
regs->r8 = regs->r9 = regs->r10 = regs->r11 = 0;
|
||||
regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0;
|
||||
t->fs = t->gs = 0;
|
||||
t->fsindex = t->gsindex = 0;
|
||||
t->ds = t->es = ds;
|
||||
}
|
||||
|
||||
#define ELF_PLAT_INIT(_r, load_addr) do { \
|
||||
struct task_struct *cur = current; \
|
||||
(_r)->bx = 0; (_r)->cx = 0; (_r)->dx = 0; \
|
||||
(_r)->si = 0; (_r)->di = 0; (_r)->bp = 0; \
|
||||
(_r)->ax = 0; \
|
||||
(_r)->r8 = 0; \
|
||||
(_r)->r9 = 0; \
|
||||
(_r)->r10 = 0; \
|
||||
(_r)->r11 = 0; \
|
||||
(_r)->r12 = 0; \
|
||||
(_r)->r13 = 0; \
|
||||
(_r)->r14 = 0; \
|
||||
(_r)->r15 = 0; \
|
||||
cur->thread.fs = 0; cur->thread.gs = 0; \
|
||||
cur->thread.fsindex = 0; cur->thread.gsindex = 0; \
|
||||
cur->thread.ds = 0; cur->thread.es = 0; \
|
||||
elf_common_init(¤t->thread, _r, 0); \
|
||||
clear_thread_flag(TIF_IA32); \
|
||||
} while (0)
|
||||
|
||||
#define COMPAT_ELF_PLAT_INIT(regs, load_addr) \
|
||||
elf_common_init(¤t->thread, regs, __USER_DS)
|
||||
#define compat_start_thread(regs, ip, sp) do { \
|
||||
start_ia32_thread(regs, ip, sp); \
|
||||
set_fs(USER_DS); \
|
||||
} while (0)
|
||||
#define COMPAT_SET_PERSONALITY(ex, ibcs2) do { \
|
||||
if (test_thread_flag(TIF_IA32)) \
|
||||
clear_thread_flag(TIF_ABI_PENDING); \
|
||||
else \
|
||||
set_thread_flag(TIF_ABI_PENDING); \
|
||||
current->personality |= force_personality32; \
|
||||
} while (0)
|
||||
#define COMPAT_ELF_PLATFORM ("i686")
|
||||
|
||||
/* I'm not sure if we can use '-' here */
|
||||
#define ELF_PLATFORM ("x86_64")
|
||||
extern void set_personality_64bit(void);
|
||||
extern int vdso_enabled;
|
||||
extern unsigned int sysctl_vsyscall32;
|
||||
extern int force_personality32;
|
||||
|
||||
#endif /* !CONFIG_X86_32 */
|
||||
|
||||
@ -179,18 +208,20 @@ extern int vdso_enabled;
|
||||
|
||||
struct task_struct;
|
||||
|
||||
#ifdef CONFIG_X86_32
|
||||
|
||||
#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
|
||||
|
||||
/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
|
||||
|
||||
#define ARCH_DLINFO \
|
||||
#define ARCH_DLINFO_IA32(vdso_enabled) \
|
||||
do if (vdso_enabled) { \
|
||||
NEW_AUX_ENT(AT_SYSINFO, VDSO_ENTRY); \
|
||||
NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE); \
|
||||
} while (0)
|
||||
|
||||
#ifdef CONFIG_X86_32
|
||||
|
||||
#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))
|
||||
|
||||
#define ARCH_DLINFO ARCH_DLINFO_IA32(vdso_enabled)
|
||||
|
||||
/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
|
||||
|
||||
#else /* CONFIG_X86_32 */
|
||||
|
||||
#define VDSO_HIGH_BASE 0xffffe000U /* CONFIG_COMPAT_VDSO address */
|
||||
@ -203,6 +234,12 @@ do if (vdso_enabled) { \
|
||||
NEW_AUX_ENT(AT_SYSINFO_EHDR,(unsigned long)current->mm->context.vdso);\
|
||||
} while (0)
|
||||
|
||||
#define AT_SYSINFO 32
|
||||
|
||||
#define COMPAT_ARCH_DLINFO ARCH_DLINFO_IA32(sysctl_vsyscall32)
|
||||
|
||||
#define COMPAT_ELF_ET_DYN_BASE (TASK_UNMAPPED_BASE + 0x1000000)
|
||||
|
||||
#endif /* !CONFIG_X86_32 */
|
||||
|
||||
#define VDSO_CURRENT_BASE ((unsigned long)current->mm->context.vdso)
|
||||
@ -216,6 +253,9 @@ struct linux_binprm;
|
||||
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
|
||||
int executable_stack);
|
||||
|
||||
extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
|
||||
#define compat_arch_setup_additional_pages syscall32_setup_pages
|
||||
|
||||
extern unsigned long arch_randomize_brk(struct mm_struct *mm);
|
||||
#define arch_randomize_brk arch_randomize_brk
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user