diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/ia64/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/ia64/sysdep.h | 101 |
1 files changed, 94 insertions, 7 deletions
diff --git a/sysdeps/unix/sysv/linux/ia64/sysdep.h b/sysdeps/unix/sysv/linux/ia64/sysdep.h index 57f7a7a40b..0a2c1bdc4b 100644 --- a/sysdeps/unix/sysv/linux/ia64/sysdep.h +++ b/sysdeps/unix/sysv/linux/ia64/sysdep.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1999, 2000 Free Software Foundation, Inc. +/* Copyright (C) 1999, 2000, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. Written by Jes Sorensen, <Jes.Sorensen@cern.ch>, April 1999. Based on code originally written by David Mosberger-Tang @@ -83,7 +83,7 @@ #define PSEUDO(name, syscall_name, args) \ ENTRY(name) \ DO_CALL (SYS_ify(syscall_name)); \ - cmp.eq p6,p0=-1,r10;; \ + cmp.eq p6,p0=-1,r10; \ (p6) br.cond.spnt.few __syscall_error; #define DO_CALL(num) \ @@ -102,11 +102,98 @@ #else /* not __ASSEMBLER__ */ -/* Define a macro which expands into the inline wrapper code for a system - call. */ -#if 0 +/* On IA-64 we have stacked registers for passing arguments. The + "out" registers end up being the called function's "in" + registers. + + Also, since we have plenty of registers we have two return values + from a syscall. r10 is set to -1 on error, whilst r8 contains the + (non-negative) errno on error or the return value on success. + */ #undef INLINE_SYSCALL -#define INLINE_SYSCALL(name, nr, args...) __##name (args) -#endif +#define INLINE_SYSCALL(name, nr, args...) \ + ({ \ + register long _r8 asm ("r8"); \ + register long _r10 asm ("r10"); \ + register long _r15 asm ("r15") = __NR_##name; \ + long _retval; \ + LOAD_ARGS_##nr (args); \ + __asm __volatile ("break %3;;\n\t" \ + : "=r" (_r8), "=r" (_r10), "=r" (_r15) \ + : "i" (__BREAK_SYSCALL), "2" (_r15) \ + ASM_ARGS_##nr \ + : "memory" ASM_CLOBBERS_##nr); \ + _retval = _r8; \ + if (_r10 == -1) \ + { \ + __set_errno (_retval); \ + _retval = -1; \ + } \ + _retval; }) + +#undef INTERNAL_SYSCALL +#define INTERNAL_SYSCALL(name, nr, args...) \ + ({ \ + register long _r8 asm ("r8"); \ + register long _r10 asm ("r10"); \ + register long _r15 asm ("r15") = __NR_##name; \ + long _retval; \ + LOAD_ARGS_##nr (args); \ + __asm __volatile ("break %3;;\n\t" \ + : "=r" (_r8), "=r" (_r10), "=r" (_r15) \ + : "i" (__BREAK_SYSCALL), "2" (_r15) \ + ASM_ARGS_##nr \ + : "memory" ASM_CLOBBERS_##nr); \ + _retval = _r8; \ + if (_r10 == -1) \ + _retval = -_retval; \ + _retval; }) + +#undef INTERNAL_SYSCALL_ERROR_P +#define INTERNAL_SYSCALL_ERROR_P(val) ((unsigned long) (val) >= -4095UL) + +#undef INTERNAL_SYSCALL_ERRNO +#define INTERNAL_SYSCALL_ERRNO(val) (-(val)) + +#define LOAD_ARGS_0() do { } while (0) +#define LOAD_ARGS_1(out0) \ + register long _out0 asm ("out0") = (long) (out0); \ + LOAD_ARGS_0 () +#define LOAD_ARGS_2(out0, out1) \ + register long _out1 asm ("out1") = (long) (out1); \ + LOAD_ARGS_1 (out0) +#define LOAD_ARGS_3(out0, out1, out2) \ + register long _out2 asm ("out2") = (long) (out2); \ + LOAD_ARGS_2 (out0, out1) +#define LOAD_ARGS_4(out0, out1, out2, out3) \ + register long _out3 asm ("out3") = (long) (out3); \ + LOAD_ARGS_3 (out0, out1, out2) +#define LOAD_ARGS_5(out0, out1, out2, out3, out4) \ + register long _out4 asm ("out4") = (long) (out4); \ + LOAD_ARGS_4 (out0, out1, out2, out3) + +#define ASM_ARGS_0 +#define ASM_ARGS_1 ASM_ARGS_0, "r" (_out0) +#define ASM_ARGS_2 ASM_ARGS_1, "r" (_out1) +#define ASM_ARGS_3 ASM_ARGS_2, "r" (_out2) +#define ASM_ARGS_4 ASM_ARGS_3, "r" (_out3) +#define ASM_ARGS_5 ASM_ARGS_4, "r" (_out4) + +#define ASM_CLOBBERS_0 ASM_CLOBBERS_1, "out0" +#define ASM_CLOBBERS_1 ASM_CLOBBERS_2, "out1" +#define ASM_CLOBBERS_2 ASM_CLOBBERS_3, "out2" +#define ASM_CLOBBERS_3 ASM_CLOBBERS_4, "out3" +#define ASM_CLOBBERS_4 ASM_CLOBBERS_5, "out4" +#define ASM_CLOBBERS_5 , "out5", "out6", "out7", \ + /* Non-stacked integer registers, minus r8, r10, r15. */ \ + "r2", "r3", "r9", "r11", "r12", "r13", "r14", "r16", "r17", "r18", \ + "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", \ + "r28", "r29", "r30", "r31", \ + /* Predicate registers. */ \ + "p6", "p7", "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15", \ + /* Non-rotating fp registers. */ \ + "f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ + /* Branch registers. */ \ + "b6", "b7" #endif /* not __ASSEMBLER__ */ |