diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h | 131 |
1 files changed, 60 insertions, 71 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h index d56ff877ac..d37be2ef4f 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h @@ -69,65 +69,7 @@ #endif /* __ASSEMBLER__ */ #undef INLINE_SYSCALL -#if 1 -#define INLINE_SYSCALL(name, nr, args...) \ - ({ \ - DECLARGS_##nr; \ - long ret, err; \ - LOADARGS_##nr(name, args); \ - __asm __volatile ("sc\n\t" \ - "mfcr %1\n\t" \ - : "=r" (r3), "=r" (err) \ - : ASM_INPUT_##nr \ - : "cc", "memory"); \ - ret = r3; \ - if (err & 1 << 28) \ - { \ - __set_errno (ret); \ - ret = -1L; \ - } \ - ret; \ - }) - -#define DECLARGS_0 register long r0 __asm__ ("r0"); \ - register long r3 __asm__ ("r3") -#define DECLARGS_1 DECLARGS_0 -#define DECLARGS_2 DECLARGS_1; register long r4 __asm__ ("r4") -#define DECLARGS_3 DECLARGS_2; register long r5 __asm__ ("r5") -#define DECLARGS_4 DECLARGS_3; register long r6 __asm__ ("r6") -#define DECLARGS_5 DECLARGS_4; register long r7 __asm__ ("r7") -#define DECLARGS_6 DECLARGS_5; register long r8 __asm__ ("r8") - -#define LOADARGS_0(name) \ - r0 = __NR_##name -#define LOADARGS_1(name, arg1) \ - LOADARGS_0(name); \ - r3 = (long) (arg1) -#define LOADARGS_2(name, arg1, arg2) \ - LOADARGS_1(name, arg1); \ - r4 = (long) (arg2) -#define LOADARGS_3(name, arg1, arg2, arg3) \ - LOADARGS_2(name, arg1, arg2); \ - r5 = (long) (arg3) -#define LOADARGS_4(name, arg1, arg2, arg3, arg4) \ - LOADARGS_3(name, arg1, arg2, arg3); \ - r6 = (long) (arg4) -#define LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5) \ - LOADARGS_4(name, arg1, arg2, arg3, arg4); \ - r7 = (long) (arg5) -#define LOADARGS_6(name, arg1, arg2, arg3, arg4, arg5, arg6) \ - LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5); \ - r8 = (long) (arg6) - -#define ASM_INPUT_0 "r" (r0) -#define ASM_INPUT_1 ASM_INPUT_0, "0" (r3) -#define ASM_INPUT_2 ASM_INPUT_1, "r" (r4) -#define ASM_INPUT_3 ASM_INPUT_2, "r" (r5) -#define ASM_INPUT_4 ASM_INPUT_3, "r" (r6) -#define ASM_INPUT_5 ASM_INPUT_4, "r" (r7) -#define ASM_INPUT_6 ASM_INPUT_5, "r" (r8) -#else /* This version is for kernels that implement system calls that behave like function calls as far as register saving. */ #define INLINE_SYSCALL(name, nr, args...) \ @@ -149,40 +91,89 @@ : ASM_INPUT_##nr \ : "r9", "r10", "r11", "r12", \ "fr0", "fr1", "fr2", "fr3", \ - "fr4", "fr5", "fr6", "fr7", \ - "fr8", "fr9", "fr10", "fr11", \ - "fr12", "fr13", \ - "ctr", "lr", \ - "cr0", "cr1", "cr5", "cr6", "cr7", \ - "memory"); \ + "fr4", "fr5", "fr6", "fr7", \ + "fr8", "fr9", "fr10", "fr11", \ + "fr12", "fr13", \ + "ctr", "lr", \ + "cr0", "cr1", "cr5", "cr6", "cr7", \ + "memory"); \ ret = r3; \ - if (err & 1 << 28) \ + if (__builtin_expect ((err & (1 << 28)), 0)) \ { \ - __set_errno (ret); \ - ret = -1L; \ + __set_errno (ret); \ + ret = -1L; \ } \ ret; \ }) -#define LOADARGS_0(name) \ +/* Define a macro which expands inline into the wrapper code for a system + call. This use is for internal calls that do not need to handle errors + normally. It will never touch errno. This returns just what the kernel + gave back in the non-error (CR0.SO cleared) case, otherwise (CR0.SO set) + the negation of the return value in the kernel gets reverted. */ + +# undef INTERNAL_SYSCALL +# define INTERNAL_SYSCALL(name, nr, args...) \ + ({ \ + register long r0 __asm__ ("r0"); \ + register long r3 __asm__ ("r3"); \ + register long r4 __asm__ ("r4"); \ + register long r5 __asm__ ("r5"); \ + register long r6 __asm__ ("r6"); \ + register long r7 __asm__ ("r7"); \ + register long r8 __asm__ ("r8"); \ + LOADARGS_##nr(name, args); \ + __asm__ __volatile__ \ + ("sc\n\t" \ + "bns+ 0f\n\t" \ + "neg %1,%1\n" \ + "0:" \ + : "=&r" (r0), \ + "=&r" (r3), "=&r" (r4), "=&r" (r5), \ + "=&r" (r6), "=&r" (r7), "=&r" (r8) \ + : ASM_INPUT_##nr \ + : "r9", "r10", "r11", "r12", \ + "cr0", "ctr", "memory"); \ + (int) r3; \ + }) + +# undef INTERNAL_SYSCALL_ERROR_P +# define INTERNAL_SYSCALL_ERROR_P(val) ((unsigned long) (val) >= 0xfffffffffffff001u) + +# undef INTERNAL_SYSCALL_ERRNO +# define INTERNAL_SYSCALL_ERRNO(val) (-(val)) + +#define LOADARGS_0(name, dummy) \ r0 = __NR_##name #define LOADARGS_1(name, arg1) \ - LOADARGS_0(name); \ + LOADARGS_0(name, 0); \ + extern void __illegally_sized_syscall_##name##_arg1 (void); \ + if (sizeof (arg1) > 8) __illegally_sized_syscall_##name##_arg1 (); \ r3 = (long) (arg1) #define LOADARGS_2(name, arg1, arg2) \ LOADARGS_1(name, arg1); \ + extern void __illegally_sized_syscall_##name##_arg2 (void); \ + if (sizeof (arg2) > 8) __illegally_sized_syscall_##name##_arg2 (); \ r4 = (long) (arg2) #define LOADARGS_3(name, arg1, arg2, arg3) \ LOADARGS_2(name, arg1, arg2); \ + extern void __illegally_sized_syscall_##name##_arg3 (void); \ + if (sizeof (arg3) > 8) __illegally_sized_syscall_##name##_arg3 (); \ r5 = (long) (arg3) #define LOADARGS_4(name, arg1, arg2, arg3, arg4) \ LOADARGS_3(name, arg1, arg2, arg3); \ + extern void __illegally_sized_syscall_##name##_arg4 (void); \ + if (sizeof (arg4) > 8) __illegally_sized_syscall_##name##_arg4 (); \ r6 = (long) (arg4) #define LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5) \ LOADARGS_4(name, arg1, arg2, arg3, arg4); \ + extern void __illegally_sized_syscall_##name##_arg5 (void); \ + if (sizeof (arg5) > 8) __illegally_sized_syscall_##name##_arg5 (); \ r7 = (long) (arg5) #define LOADARGS_6(name, arg1, arg2, arg3, arg4, arg5, arg6) \ LOADARGS_5(name, arg1, arg2, arg3, arg4, arg5); \ + extern void __illegally_sized_syscall_##name##_arg6 (void); \ + if (sizeof (arg6) > 8) __illegally_sized_syscall_##name##_arg6 (); \ r8 = (long) (arg6) #define ASM_INPUT_0 "0" (r0) @@ -193,6 +184,4 @@ #define ASM_INPUT_5 ASM_INPUT_4, "5" (r7) #define ASM_INPUT_6 ASM_INPUT_5, "6" (r8) -#endif - #endif /* linux/powerpc/powerpc64/sysdep.h */ |