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x86: merge __put_user_asm and its user.
Move both __put_user_asm and __put_user_size to uaccess.h. i386 already had a special function for 64-bit access, so for x86_64, we just define a macro with the same name. Note that for X86_64, CONFIG_X86_WP_WORKS_OK will always be defined, so the #else part will never be even compiled in. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Glauber Costa
Ingo Molnar
parent
d42e6af613
commit
dc70ddf409
@ -178,6 +178,90 @@ extern int __get_user_bad(void);
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__ret_gu; \
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})
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#ifdef CONFIG_X86_32
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#define __put_user_u64(x, addr, err) \
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asm volatile("1: movl %%eax,0(%2)\n" \
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"2: movl %%edx,4(%2)\n" \
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"3:\n" \
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".section .fixup,\"ax\"\n" \
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"4: movl %3,%0\n" \
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" jmp 3b\n" \
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".previous\n" \
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_ASM_EXTABLE(1b, 4b) \
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_ASM_EXTABLE(2b, 4b) \
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: "=r" (err) \
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: "A" (x), "r" (addr), "i" (-EFAULT), "0" (err))
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#else
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#define __put_user_u64(x, ptr, retval) \
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__put_user_asm(x, ptr, retval, "q", "", "Zr", -EFAULT)
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#endif
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#ifdef CONFIG_X86_WP_WORKS_OK
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#define __put_user_size(x, ptr, size, retval, errret) \
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do { \
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retval = 0; \
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__chk_user_ptr(ptr); \
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switch (size) { \
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case 1: \
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__put_user_asm(x, ptr, retval, "b", "b", "iq", errret); \
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break; \
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case 2: \
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__put_user_asm(x, ptr, retval, "w", "w", "ir", errret); \
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break; \
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case 4: \
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__put_user_asm(x, ptr, retval, "l", "k", "ir", errret);\
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break; \
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case 8: \
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__put_user_u64((__typeof__(*ptr))(x), ptr, retval); \
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break; \
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default: \
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__put_user_bad(); \
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} \
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} while (0)
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#else
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#define __put_user_size(x, ptr, size, retval, errret) \
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do { \
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__typeof__(*(ptr))__pus_tmp = x; \
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retval = 0; \
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\
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if (unlikely(__copy_to_user_ll(ptr, &__pus_tmp, size) != 0)) \
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retval = errret; \
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} while (0)
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#endif
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#define __put_user_nocheck(x, ptr, size) \
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({ \
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long __pu_err; \
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__put_user_size((x), (ptr), (size), __pu_err, -EFAULT); \
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__pu_err; \
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})
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/* FIXME: this hack is definitely wrong -AK */
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struct __large_struct { unsigned long buf[100]; };
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#define __m(x) (*(struct __large_struct __user *)(x))
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/*
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* Tell gcc we read from memory instead of writing: this is because
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* we do not write to any memory gcc knows about, so there are no
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* aliasing issues.
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*/
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#define __put_user_asm(x, addr, err, itype, rtype, ltype, errret) \
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asm volatile("1: mov"itype" %"rtype"1,%2\n" \
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"2:\n" \
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".section .fixup,\"ax\"\n" \
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"3: mov %3,%0\n" \
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" jmp 2b\n" \
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".previous\n" \
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_ASM_EXTABLE(1b, 3b) \
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: "=r"(err) \
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: ltype(x), "m" (__m(addr)), "i" (errret), "0" (err))
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#ifdef CONFIG_X86_32
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# include "uaccess_32.h"
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@ -145,83 +145,6 @@ extern void __put_user_8(void);
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#define __put_user(x, ptr) \
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__put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
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#define __put_user_nocheck(x, ptr, size) \
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({ \
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long __pu_err; \
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__put_user_size((x), (ptr), (size), __pu_err, -EFAULT); \
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__pu_err; \
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})
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#define __put_user_u64(x, addr, err) \
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asm volatile("1: movl %%eax,0(%2)\n" \
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"2: movl %%edx,4(%2)\n" \
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"3:\n" \
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".section .fixup,\"ax\"\n" \
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"4: movl %3,%0\n" \
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" jmp 3b\n" \
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".previous\n" \
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_ASM_EXTABLE(1b, 4b) \
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_ASM_EXTABLE(2b, 4b) \
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: "=r" (err) \
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: "A" (x), "r" (addr), "i" (-EFAULT), "0" (err))
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#ifdef CONFIG_X86_WP_WORKS_OK
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#define __put_user_size(x, ptr, size, retval, errret) \
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do { \
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retval = 0; \
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__chk_user_ptr(ptr); \
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switch (size) { \
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case 1: \
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__put_user_asm(x, ptr, retval, "b", "b", "iq", errret); \
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break; \
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case 2: \
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__put_user_asm(x, ptr, retval, "w", "w", "ir", errret); \
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break; \
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case 4: \
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__put_user_asm(x, ptr, retval, "l", "k", "ir", errret);\
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break; \
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case 8: \
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__put_user_u64((__typeof__(*ptr))(x), ptr, retval); \
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break; \
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default: \
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__put_user_bad(); \
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} \
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} while (0)
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#else
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#define __put_user_size(x, ptr, size, retval, errret) \
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do { \
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__typeof__(*(ptr))__pus_tmp = x; \
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retval = 0; \
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\
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if (unlikely(__copy_to_user_ll(ptr, &__pus_tmp, size) != 0)) \
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retval = errret; \
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} while (0)
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#endif
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struct __large_struct { unsigned long buf[100]; };
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#define __m(x) (*(struct __large_struct __user *)(x))
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/*
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* Tell gcc we read from memory instead of writing: this is because
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* we do not write to any memory gcc knows about, so there are no
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* aliasing issues.
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*/
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#define __put_user_asm(x, addr, err, itype, rtype, ltype, errret) \
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asm volatile("1: mov"itype" %"rtype"1,%2\n" \
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"2:\n" \
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".section .fixup,\"ax\"\n" \
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"3: movl %3,%0\n" \
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" jmp 2b\n" \
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".previous\n" \
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_ASM_EXTABLE(1b, 3b) \
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: "=r"(err) \
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: ltype (x), "m" (__m(addr)), "i" (errret), "0" (err))
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#define __get_user_nocheck(x, ptr, size) \
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({ \
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long __gu_err; \
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@ -34,14 +34,6 @@ extern void __put_user_bad(void);
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#define __get_user_unaligned __get_user
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#define __put_user_unaligned __put_user
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#define __put_user_nocheck(x, ptr, size) \
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({ \
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int __pu_err; \
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__put_user_size((x), (ptr), (size), __pu_err, -EFAULT); \
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__pu_err; \
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})
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#define __put_user_check(x, ptr, size) \
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({ \
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int __pu_err; \
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@ -65,49 +57,6 @@ extern void __put_user_bad(void);
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__pu_err; \
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})
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#define __put_user_size(x, ptr, size, retval, errret) \
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do { \
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retval = 0; \
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__chk_user_ptr(ptr); \
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switch (size) { \
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case 1: \
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__put_user_asm(x, ptr, retval, "b", "b", "iq", errret);\
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break; \
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case 2: \
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__put_user_asm(x, ptr, retval, "w", "w", "ir", errret);\
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break; \
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case 4: \
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__put_user_asm(x, ptr, retval, "l", "k", "ir", errret);\
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break; \
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case 8: \
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__put_user_asm(x, ptr, retval, "q", "", "Zr", errret); \
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break; \
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default: \
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__put_user_bad(); \
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} \
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} while (0)
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/* FIXME: this hack is definitely wrong -AK */
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struct __large_struct { unsigned long buf[100]; };
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#define __m(x) (*(struct __large_struct __user *)(x))
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/*
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* Tell gcc we read from memory instead of writing: this is because
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* we do not write to any memory gcc knows about, so there are no
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* aliasing issues.
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*/
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#define __put_user_asm(x, addr, err, itype, rtype, ltype, errno) \
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asm volatile("1: mov"itype" %"rtype"1,%2\n" \
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"2:\n" \
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".section .fixup, \"ax\"\n" \
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"3: mov %3,%0\n" \
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" jmp 2b\n" \
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".previous\n" \
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_ASM_EXTABLE(1b, 3b) \
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: "=r"(err) \
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: ltype (x), "m" (__m(addr)), "i" (errno), "0" (err))
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#define __get_user_nocheck(x, ptr, size) \
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({ \
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int __gu_err; \
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