X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-parisc%2Fuaccess.h;h=4878b9501f245ec77bb826a800d2878e34c7cc0e;hb=22ab019b6ff8f3f93ddc93135d7e7ff24d982fe0;hp=f6c417c8c484a8965eee6ac6cfd175d45a82c8d4;hpb=5d54e69c68c05b162a56f9914cae72afd7e6f40a;p=linux-2.6-omap-h63xx.git diff --git a/include/asm-parisc/uaccess.h b/include/asm-parisc/uaccess.h index f6c417c8c48..4878b9501f2 100644 --- a/include/asm-parisc/uaccess.h +++ b/include/asm-parisc/uaccess.h @@ -4,7 +4,6 @@ /* * User space memory access functions */ -#include #include #include #include @@ -43,16 +42,18 @@ static inline long access_ok(int type, const void __user * addr, #define put_user __put_user #define get_user __get_user -#if BITS_PER_LONG == 32 +#if !defined(CONFIG_64BIT) #define LDD_KERNEL(ptr) __get_kernel_bad(); #define LDD_USER(ptr) __get_user_bad(); #define STD_KERNEL(x, ptr) __put_kernel_asm64(x,ptr) #define STD_USER(x, ptr) __put_user_asm64(x,ptr) +#define ASM_WORD_INSN ".word\t" #else -#define LDD_KERNEL(ptr) __get_kernel_asm("ldd",ptr) -#define LDD_USER(ptr) __get_user_asm("ldd",ptr) -#define STD_KERNEL(x, ptr) __put_kernel_asm("std",x,ptr) -#define STD_USER(x, ptr) __put_user_asm("std",x,ptr) +#define LDD_KERNEL(ptr) __get_kernel_asm("ldd",ptr) +#define LDD_USER(ptr) __get_user_asm("ldd",ptr) +#define STD_KERNEL(x, ptr) __put_kernel_asm("std",x,ptr) +#define STD_USER(x, ptr) __put_user_asm("std",x,ptr) +#define ASM_WORD_INSN ".dword\t" #endif /* @@ -66,6 +67,11 @@ struct exception_table_entry { long fixup; /* fixup routine */ }; +#define ASM_EXCEPTIONTABLE_ENTRY( fault_addr, except_addr )\ + ".section __ex_table,\"aw\"\n" \ + ASM_WORD_INSN #fault_addr ", " #except_addr "\n\t" \ + ".previous\n" + /* * The page fault handler stores, in a per-cpu area, the following information * if a fixup routine is available. @@ -104,43 +110,19 @@ struct exception_data { __gu_err; \ }) -#ifdef __LP64__ -#define __get_kernel_asm(ldx,ptr) \ - __asm__("\n1:\t" ldx "\t0(%2),%0\n" \ - "\t.section __ex_table,\"aw\"\n" \ - "\t.dword\t1b,fixup_get_user_skip_1\n" \ - "\t.previous" \ - : "=r"(__gu_val), "=r"(__gu_err) \ - : "r"(ptr), "1"(__gu_err) \ - : "r1"); - -#define __get_user_asm(ldx,ptr) \ - __asm__("\n1:\t" ldx "\t0(%%sr3,%2),%0\n" \ - "\t.section __ex_table,\"aw\"\n" \ - "\t.dword\t1b,fixup_get_user_skip_1\n" \ - "\t.previous" \ - : "=r"(__gu_val), "=r"(__gu_err) \ - : "r"(ptr), "1"(__gu_err) \ - : "r1"); -#else #define __get_kernel_asm(ldx,ptr) \ - __asm__("\n1:\t" ldx "\t0(%2),%0\n" \ - "\t.section __ex_table,\"aw\"\n" \ - "\t.word\t1b,fixup_get_user_skip_1\n" \ - "\t.previous" \ + __asm__("\n1:\t" ldx "\t0(%2),%0\n\t" \ + ASM_EXCEPTIONTABLE_ENTRY(1b, fixup_get_user_skip_1)\ : "=r"(__gu_val), "=r"(__gu_err) \ : "r"(ptr), "1"(__gu_err) \ : "r1"); #define __get_user_asm(ldx,ptr) \ - __asm__("\n1:\t" ldx "\t0(%%sr3,%2),%0\n" \ - "\t.section __ex_table,\"aw\"\n" \ - "\t.word\t1b,fixup_get_user_skip_1\n" \ - "\t.previous" \ + __asm__("\n1:\t" ldx "\t0(%%sr3,%2),%0\n\t" \ + ASM_EXCEPTIONTABLE_ENTRY(1b,fixup_get_user_skip_1)\ : "=r"(__gu_val), "=r"(__gu_err) \ : "r"(ptr), "1"(__gu_err) \ : "r1"); -#endif /* !__LP64__ */ #define __put_user(x,ptr) \ ({ \ @@ -172,82 +154,61 @@ struct exception_data { /* * The "__put_user/kernel_asm()" macros tell gcc they read from memory * instead of writing. This is because they do not write to any memory - * gcc knows about, so there are no aliasing issues. + * gcc knows about, so there are no aliasing issues. These macros must + * also be aware that "fixup_put_user_skip_[12]" are executed in the + * context of the fault, and any registers used there must be listed + * as clobbers. In this case only "r1" is used by the current routines. + * r8/r9 are already listed as err/val. */ -#ifdef __LP64__ -#define __put_kernel_asm(stx,x,ptr) \ - __asm__ __volatile__ ( \ - "\n1:\t" stx "\t%2,0(%1)\n" \ - "\t.section __ex_table,\"aw\"\n" \ - "\t.dword\t1b,fixup_put_user_skip_1\n" \ - "\t.previous" \ - : "=r"(__pu_err) \ - : "r"(ptr), "r"(x), "0"(__pu_err)) - -#define __put_user_asm(stx,x,ptr) \ - __asm__ __volatile__ ( \ - "\n1:\t" stx "\t%2,0(%%sr3,%1)\n" \ - "\t.section __ex_table,\"aw\"\n" \ - "\t.dword\t1b,fixup_put_user_skip_1\n" \ - "\t.previous" \ - : "=r"(__pu_err) \ - : "r"(ptr), "r"(x), "0"(__pu_err) \ - : "r1") -#else #define __put_kernel_asm(stx,x,ptr) \ __asm__ __volatile__ ( \ - "\n1:\t" stx "\t%2,0(%1)\n" \ - "\t.section __ex_table,\"aw\"\n" \ - "\t.word\t1b,fixup_put_user_skip_1\n" \ - "\t.previous" \ + "\n1:\t" stx "\t%2,0(%1)\n\t" \ + ASM_EXCEPTIONTABLE_ENTRY(1b,fixup_put_user_skip_1)\ : "=r"(__pu_err) \ : "r"(ptr), "r"(x), "0"(__pu_err) \ - : "r1") + : "r1") #define __put_user_asm(stx,x,ptr) \ __asm__ __volatile__ ( \ - "\n1:\t" stx "\t%2,0(%%sr3,%1)\n" \ - "\t.section __ex_table,\"aw\"\n" \ - "\t.word\t1b,fixup_put_user_skip_1\n" \ - "\t.previous" \ + "\n1:\t" stx "\t%2,0(%%sr3,%1)\n\t" \ + ASM_EXCEPTIONTABLE_ENTRY(1b,fixup_put_user_skip_1)\ : "=r"(__pu_err) \ : "r"(ptr), "r"(x), "0"(__pu_err) \ : "r1") -#define __put_kernel_asm64(__val,ptr) do { \ - u64 __val64 = (u64)(__val); \ - u32 hi = (__val64) >> 32; \ - u32 lo = (__val64) & 0xffffffff; \ + +#if !defined(CONFIG_64BIT) + +#define __put_kernel_asm64(__val,ptr) do { \ + u64 __val64 = (u64)(__val); \ + u32 hi = (__val64) >> 32; \ + u32 lo = (__val64) & 0xffffffff; \ __asm__ __volatile__ ( \ - "\n1:\tstw %2,0(%1)\n" \ - "\n2:\tstw %3,4(%1)\n" \ - "\t.section __ex_table,\"aw\"\n" \ - "\t.word\t1b,fixup_put_user_skip_2\n" \ - "\t.word\t2b,fixup_put_user_skip_1\n" \ - "\t.previous" \ + "\n1:\tstw %2,0(%1)" \ + "\n2:\tstw %3,4(%1)\n\t" \ + ASM_EXCEPTIONTABLE_ENTRY(1b,fixup_put_user_skip_2)\ + ASM_EXCEPTIONTABLE_ENTRY(2b,fixup_put_user_skip_1)\ : "=r"(__pu_err) \ : "r"(ptr), "r"(hi), "r"(lo), "0"(__pu_err) \ : "r1"); \ } while (0) -#define __put_user_asm64(__val,ptr) do { \ - u64 __val64 = (u64)__val; \ - u32 hi = (__val64) >> 32; \ - u32 lo = (__val64) & 0xffffffff; \ +#define __put_user_asm64(__val,ptr) do { \ + u64 __val64 = (u64)(__val); \ + u32 hi = (__val64) >> 32; \ + u32 lo = (__val64) & 0xffffffff; \ __asm__ __volatile__ ( \ - "\n1:\tstw %2,0(%%sr3,%1)\n" \ - "\n2:\tstw %3,4(%%sr3,%1)\n" \ - "\t.section __ex_table,\"aw\"\n" \ - "\t.word\t1b,fixup_get_user_skip_2\n" \ - "\t.word\t2b,fixup_get_user_skip_1\n" \ - "\t.previous" \ + "\n1:\tstw %2,0(%%sr3,%1)" \ + "\n2:\tstw %3,4(%%sr3,%1)\n\t" \ + ASM_EXCEPTIONTABLE_ENTRY(1b,fixup_put_user_skip_2)\ + ASM_EXCEPTIONTABLE_ENTRY(2b,fixup_put_user_skip_1)\ : "=r"(__pu_err) \ : "r"(ptr), "r"(hi), "r"(lo), "0"(__pu_err) \ : "r1"); \ } while (0) -#endif /* !__LP64__ */ +#endif /* !defined(CONFIG_64BIT) */ /*