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-rw-r--r--arch/x86/include/asm/asm.h6
-rw-r--r--arch/x86/include/asm/processor.h1
-rw-r--r--arch/x86/include/asm/sigframe.h6
-rw-r--r--arch/x86/include/asm/sighandling.h3
-rw-r--r--arch/x86/include/asm/uaccess.h140
-rw-r--r--arch/x86/include/asm/uaccess_32.h27
-rw-r--r--arch/x86/include/asm/uaccess_64.h108
7 files changed, 3 insertions, 288 deletions
diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h
index cd339b88d5d4..0f63585edf5f 100644
--- a/arch/x86/include/asm/asm.h
+++ b/arch/x86/include/asm/asm.h
@@ -138,9 +138,6 @@
# define _ASM_EXTABLE_FAULT(from, to) \
_ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
-# define _ASM_EXTABLE_EX(from, to) \
- _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext)
-
# define _ASM_NOKPROBE(entry) \
.pushsection "_kprobe_blacklist","aw" ; \
_ASM_ALIGN ; \
@@ -166,9 +163,6 @@
# define _ASM_EXTABLE_FAULT(from, to) \
_ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
-# define _ASM_EXTABLE_EX(from, to) \
- _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext)
-
/* For C file, we already have NOKPROBE_SYMBOL macro */
#endif
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 09705ccc393c..19718fcfdd6a 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -541,7 +541,6 @@ struct thread_struct {
mm_segment_t addr_limit;
unsigned int sig_on_uaccess_err:1;
- unsigned int uaccess_err:1; /* uaccess failed */
/* Floating point and extended processor state */
struct fpu fpu;
diff --git a/arch/x86/include/asm/sigframe.h b/arch/x86/include/asm/sigframe.h
index f176114c04d4..84eab2724875 100644
--- a/arch/x86/include/asm/sigframe.h
+++ b/arch/x86/include/asm/sigframe.h
@@ -33,11 +33,7 @@ struct sigframe_ia32 {
* legacy application accessing/modifying it.
*/
struct _fpstate_32 fpstate_unused;
-#ifdef CONFIG_IA32_EMULATION
- unsigned int extramask[_COMPAT_NSIG_WORDS-1];
-#else /* !CONFIG_IA32_EMULATION */
- unsigned long extramask[_NSIG_WORDS-1];
-#endif /* CONFIG_IA32_EMULATION */
+ unsigned int extramask[1];
char retcode[8];
/* fp state follows here */
};
diff --git a/arch/x86/include/asm/sighandling.h b/arch/x86/include/asm/sighandling.h
index 2fcbd6f33ef7..35e0b579ffcb 100644
--- a/arch/x86/include/asm/sighandling.h
+++ b/arch/x86/include/asm/sighandling.h
@@ -14,9 +14,6 @@
X86_EFLAGS_CF | X86_EFLAGS_RF)
void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
-int setup_sigcontext(struct sigcontext __user *sc, void __user *fpstate,
- struct pt_regs *regs, unsigned long mask);
-
#ifdef CONFIG_X86_X32_ABI
asmlinkage long sys32_x32_rt_sigreturn(void);
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index 61d93f062a36..d11662f753d2 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -193,23 +193,12 @@ __typeof__(__builtin_choose_expr(sizeof(x) > sizeof(0UL), 0ULL, 0UL))
: : "A" (x), "r" (addr) \
: : label)
-#define __put_user_asm_ex_u64(x, addr) \
- asm volatile("\n" \
- "1: movl %%eax,0(%1)\n" \
- "2: movl %%edx,4(%1)\n" \
- "3:" \
- _ASM_EXTABLE_EX(1b, 2b) \
- _ASM_EXTABLE_EX(2b, 3b) \
- : : "A" (x), "r" (addr))
-
#define __put_user_x8(x, ptr, __ret_pu) \
asm volatile("call __put_user_8" : "=a" (__ret_pu) \
: "A" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx")
#else
#define __put_user_goto_u64(x, ptr, label) \
__put_user_goto(x, ptr, "q", "", "er", label)
-#define __put_user_asm_ex_u64(x, addr) \
- __put_user_asm_ex(x, addr, "q", "", "er")
#define __put_user_x8(x, ptr, __ret_pu) __put_user_x(8, x, ptr, __ret_pu)
#endif
@@ -289,31 +278,6 @@ do { \
} \
} while (0)
-/*
- * This doesn't do __uaccess_begin/end - the exception handling
- * around it must do that.
- */
-#define __put_user_size_ex(x, ptr, size) \
-do { \
- __chk_user_ptr(ptr); \
- switch (size) { \
- case 1: \
- __put_user_asm_ex(x, ptr, "b", "b", "iq"); \
- break; \
- case 2: \
- __put_user_asm_ex(x, ptr, "w", "w", "ir"); \
- break; \
- case 4: \
- __put_user_asm_ex(x, ptr, "l", "k", "ir"); \
- break; \
- case 8: \
- __put_user_asm_ex_u64((__typeof__(*ptr))(x), ptr); \
- break; \
- default: \
- __put_user_bad(); \
- } \
-} while (0)
-
#ifdef CONFIG_X86_32
#define __get_user_asm_u64(x, ptr, retval, errret) \
({ \
@@ -335,12 +299,9 @@ do { \
"i" (errret), "0" (retval)); \
})
-#define __get_user_asm_ex_u64(x, ptr) (x) = __get_user_bad()
#else
#define __get_user_asm_u64(x, ptr, retval, errret) \
__get_user_asm(x, ptr, retval, "q", "", "=r", errret)
-#define __get_user_asm_ex_u64(x, ptr) \
- __get_user_asm_ex(x, ptr, "q", "", "=r")
#endif
#define __get_user_size(x, ptr, size, retval, errret) \
@@ -378,53 +339,6 @@ do { \
: "=r" (err), ltype(x) \
: "m" (__m(addr)), "i" (errret), "0" (err))
-#define __get_user_asm_nozero(x, addr, err, itype, rtype, ltype, errret) \
- asm volatile("\n" \
- "1: mov"itype" %2,%"rtype"1\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: mov %3,%0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- _ASM_EXTABLE_UA(1b, 3b) \
- : "=r" (err), ltype(x) \
- : "m" (__m(addr)), "i" (errret), "0" (err))
-
-/*
- * This doesn't do __uaccess_begin/end - the exception handling
- * around it must do that.
- */
-#define __get_user_size_ex(x, ptr, size) \
-do { \
- __chk_user_ptr(ptr); \
- switch (size) { \
- case 1: \
- __get_user_asm_ex(x, ptr, "b", "b", "=q"); \
- break; \
- case 2: \
- __get_user_asm_ex(x, ptr, "w", "w", "=r"); \
- break; \
- case 4: \
- __get_user_asm_ex(x, ptr, "l", "k", "=r"); \
- break; \
- case 8: \
- __get_user_asm_ex_u64(x, ptr); \
- break; \
- default: \
- (x) = __get_user_bad(); \
- } \
-} while (0)
-
-#define __get_user_asm_ex(x, addr, itype, rtype, ltype) \
- asm volatile("1: mov"itype" %1,%"rtype"0\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3:xor"itype" %"rtype"0,%"rtype"0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- _ASM_EXTABLE_EX(1b, 3b) \
- : ltype(x) : "m" (__m(addr)))
-
#define __put_user_nocheck(x, ptr, size) \
({ \
__label__ __pu_label; \
@@ -480,29 +394,6 @@ struct __large_struct { unsigned long buf[100]; };
retval = __put_user_failed(x, addr, itype, rtype, ltype, errret); \
} while (0)
-#define __put_user_asm_ex(x, addr, itype, rtype, ltype) \
- asm volatile("1: mov"itype" %"rtype"0,%1\n" \
- "2:\n" \
- _ASM_EXTABLE_EX(1b, 2b) \
- : : ltype(x), "m" (__m(addr)))
-
-/*
- * uaccess_try and catch
- */
-#define uaccess_try do { \
- current->thread.uaccess_err = 0; \
- __uaccess_begin(); \
- barrier();
-
-#define uaccess_try_nospec do { \
- current->thread.uaccess_err = 0; \
- __uaccess_begin_nospec(); \
-
-#define uaccess_catch(err) \
- __uaccess_end(); \
- (err) |= (current->thread.uaccess_err ? -EFAULT : 0); \
-} while (0)
-
/**
* __get_user - Get a simple variable from user space, with less checking.
* @x: Variable to store result.
@@ -552,28 +443,6 @@ struct __large_struct { unsigned long buf[100]; };
#define __put_user(x, ptr) \
__put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
-/*
- * {get|put}_user_try and catch
- *
- * get_user_try {
- * get_user_ex(...);
- * } get_user_catch(err)
- */
-#define get_user_try uaccess_try_nospec
-#define get_user_catch(err) uaccess_catch(err)
-
-#define get_user_ex(x, ptr) do { \
- unsigned long __gue_val; \
- __get_user_size_ex((__gue_val), (ptr), (sizeof(*(ptr)))); \
- (x) = (__force __typeof__(*(ptr)))__gue_val; \
-} while (0)
-
-#define put_user_try uaccess_try
-#define put_user_catch(err) uaccess_catch(err)
-
-#define put_user_ex(x, ptr) \
- __put_user_size_ex((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
-
extern unsigned long
copy_from_user_nmi(void *to, const void __user *from, unsigned long n);
extern __must_check long
@@ -695,15 +564,6 @@ extern struct movsl_mask {
#endif
/*
- * We rely on the nested NMI work to allow atomic faults from the NMI path; the
- * nested NMI paths are careful to preserve CR2.
- *
- * Caller must use pagefault_enable/disable, or run in interrupt context,
- * and also do a uaccess_ok() check
- */
-#define __copy_from_user_nmi __copy_from_user_inatomic
-
-/*
* The "unsafe" user accesses aren't really "unsafe", but the naming
* is a big fat warning: you have to not only do the access_ok()
* checking before using them, but you have to surround them with the
diff --git a/arch/x86/include/asm/uaccess_32.h b/arch/x86/include/asm/uaccess_32.h
index ba2dc1930630..388a40660c7b 100644
--- a/arch/x86/include/asm/uaccess_32.h
+++ b/arch/x86/include/asm/uaccess_32.h
@@ -23,33 +23,6 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n)
static __always_inline unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
- if (__builtin_constant_p(n)) {
- unsigned long ret;
-
- switch (n) {
- case 1:
- ret = 0;
- __uaccess_begin_nospec();
- __get_user_asm_nozero(*(u8 *)to, from, ret,
- "b", "b", "=q", 1);
- __uaccess_end();
- return ret;
- case 2:
- ret = 0;
- __uaccess_begin_nospec();
- __get_user_asm_nozero(*(u16 *)to, from, ret,
- "w", "w", "=r", 2);
- __uaccess_end();
- return ret;
- case 4:
- ret = 0;
- __uaccess_begin_nospec();
- __get_user_asm_nozero(*(u32 *)to, from, ret,
- "l", "k", "=r", 4);
- __uaccess_end();
- return ret;
- }
- }
return __copy_user_ll(to, (__force const void *)from, n);
}
diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index 5cd1caa8bc65..bc10e3dc64fe 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -65,117 +65,13 @@ copy_to_user_mcsafe(void *to, const void *from, unsigned len)
static __always_inline __must_check unsigned long
raw_copy_from_user(void *dst, const void __user *src, unsigned long size)
{
- int ret = 0;
-
- if (!__builtin_constant_p(size))
- return copy_user_generic(dst, (__force void *)src, size);
- switch (size) {
- case 1:
- __uaccess_begin_nospec();
- __get_user_asm_nozero(*(u8 *)dst, (u8 __user *)src,
- ret, "b", "b", "=q", 1);
- __uaccess_end();
- return ret;
- case 2:
- __uaccess_begin_nospec();
- __get_user_asm_nozero(*(u16 *)dst, (u16 __user *)src,
- ret, "w", "w", "=r", 2);
- __uaccess_end();
- return ret;
- case 4:
- __uaccess_begin_nospec();
- __get_user_asm_nozero(*(u32 *)dst, (u32 __user *)src,
- ret, "l", "k", "=r", 4);
- __uaccess_end();
- return ret;
- case 8:
- __uaccess_begin_nospec();
- __get_user_asm_nozero(*(u64 *)dst, (u64 __user *)src,
- ret, "q", "", "=r", 8);
- __uaccess_end();
- return ret;
- case 10:
- __uaccess_begin_nospec();
- __get_user_asm_nozero(*(u64 *)dst, (u64 __user *)src,
- ret, "q", "", "=r", 10);
- if (likely(!ret))
- __get_user_asm_nozero(*(u16 *)(8 + (char *)dst),
- (u16 __user *)(8 + (char __user *)src),
- ret, "w", "w", "=r", 2);
- __uaccess_end();
- return ret;
- case 16:
- __uaccess_begin_nospec();
- __get_user_asm_nozero(*(u64 *)dst, (u64 __user *)src,
- ret, "q", "", "=r", 16);
- if (likely(!ret))
- __get_user_asm_nozero(*(u64 *)(8 + (char *)dst),
- (u64 __user *)(8 + (char __user *)src),
- ret, "q", "", "=r", 8);
- __uaccess_end();
- return ret;
- default:
- return copy_user_generic(dst, (__force void *)src, size);
- }
+ return copy_user_generic(dst, (__force void *)src, size);
}
static __always_inline __must_check unsigned long
raw_copy_to_user(void __user *dst, const void *src, unsigned long size)
{
- int ret = 0;
-
- if (!__builtin_constant_p(size))
- return copy_user_generic((__force void *)dst, src, size);
- switch (size) {
- case 1:
- __uaccess_begin();
- __put_user_asm(*(u8 *)src, (u8 __user *)dst,
- ret, "b", "b", "iq", 1);
- __uaccess_end();
- return ret;
- case 2:
- __uaccess_begin();
- __put_user_asm(*(u16 *)src, (u16 __user *)dst,
- ret, "w", "w", "ir", 2);
- __uaccess_end();
- return ret;
- case 4:
- __uaccess_begin();
- __put_user_asm(*(u32 *)src, (u32 __user *)dst,
- ret, "l", "k", "ir", 4);
- __uaccess_end();
- return ret;
- case 8:
- __uaccess_begin();
- __put_user_asm(*(u64 *)src, (u64 __user *)dst,
- ret, "q", "", "er", 8);
- __uaccess_end();
- return ret;
- case 10:
- __uaccess_begin();
- __put_user_asm(*(u64 *)src, (u64 __user *)dst,
- ret, "q", "", "er", 10);
- if (likely(!ret)) {
- asm("":::"memory");
- __put_user_asm(4[(u16 *)src], 4 + (u16 __user *)dst,
- ret, "w", "w", "ir", 2);
- }
- __uaccess_end();
- return ret;
- case 16:
- __uaccess_begin();
- __put_user_asm(*(u64 *)src, (u64 __user *)dst,
- ret, "q", "", "er", 16);
- if (likely(!ret)) {
- asm("":::"memory");
- __put_user_asm(1[(u64 *)src], 1 + (u64 __user *)dst,
- ret, "q", "", "er", 8);
- }
- __uaccess_end();
- return ret;
- default:
- return copy_user_generic((__force void *)dst, src, size);
- }
+ return copy_user_generic((__force void *)dst, src, size);
}
static __always_inline __must_check
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-15 02:40:57 +0000