diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h | 46 |
1 files changed, 43 insertions, 3 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h index 9389d5ca12..d2cee1ffc7 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1992,97,98,99,2000,01,02 Free Software Foundation, Inc. +/* Copyright (C) 1992,97,98,99,2000,01,02,03 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -93,10 +93,50 @@ 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"); \ + register long r9 __asm__ ("r9"); \ + register long r10 __asm__ ("r10"); \ + register long r11 __asm__ ("r11"); \ + register long r12 __asm__ ("r12"); \ + 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), "=&r" (r9), "=&r" (r10), "=&r" (r11), "=&r" (r12) \ + : ASM_INPUT_##nr \ + : "cr0", "ctr", "memory"); \ + (int) r3; \ + }) + +#undef INTERNAL_SYSCALL_ERROR_P +#define INTERNAL_SYSCALL_ERROR_P(val) ((unsigned long) (val) >= -4095U) + +#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); \ r3 = (long) (arg1) # define LOADARGS_2(name, arg1, arg2) \ LOADARGS_1(name, arg1); \ |