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(INTERNAL_SYSCALL): Add 

LOAD_REGS_##nr.
(LOAD_ARGS_0, LOAD_ARGS_1, LOAD_ARGS_2, LOAD_ARGS_3, LOAD_ARGS_4)
(LOAD_ARGS_5, LOAD_ARGS_6): Load argument values into temporary
variables.
(LOAD_REGS_0, LOAD_REGS_1, LOAD_REGS_2, LOAD_REGS_3, LOAD_REGS_4)
(LOAD_REGS_5, LOAD_REGS_6): New macros to actually load the
syscall argument registers.
This commit is contained in:
Andreas Schwab 2004-04-08 23:30:26 +00:00
parent 635d5fe388
commit 693687e64e
1 changed files with 36 additions and 13 deletions
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49
sysdeps/unix/sysv/linux/m68k/sysdep.h
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@ -1,4 +1,4 @@
/* Copyright (C) 1996, 1997, 1998, 2000, 2003 Free Software Foundation, Inc. /* Copyright (C) 1996, 1997, 1998, 2000, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
Written by Andreas Schwab, <schwab@issan.informatik.uni-dortmund.de>, Written by Andreas Schwab, <schwab@issan.informatik.uni-dortmund.de>,
December 1995. December 1995.
@ -225,7 +225,11 @@ SYSCALL_ERROR_LABEL: \
#define INTERNAL_SYSCALL(name, err, nr, args...) \ #define INTERNAL_SYSCALL(name, err, nr, args...) \
({ unsigned int _sys_result; \ ({ unsigned int _sys_result; \
{ \ { \
/* Load argument values in temporary variables
to perform side effects like function calls
before the call used registers are set. */ \
LOAD_ARGS_##nr (args) \ LOAD_ARGS_##nr (args) \
LOAD_REGS_##nr \
register int _d0 asm ("%d0") = __NR_##name; \ register int _d0 asm ("%d0") = __NR_##name; \
asm volatile ("trap #0" \ asm volatile ("trap #0" \
: "=d" (_d0) \ : "=d" (_d0) \
@ -243,30 +247,49 @@ SYSCALL_ERROR_LABEL: \
#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val)) #define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
#define LOAD_ARGS_0() #define LOAD_ARGS_0()
#define LOAD_REGS_0
#define ASM_ARGS_0 #define ASM_ARGS_0
#define LOAD_ARGS_1(a1) \ #define LOAD_ARGS_1(a1) \
register int _d1 asm ("d1") = (int) (a1); \ LOAD_ARGS_0 () \
LOAD_ARGS_0 () int __arg1 = (int) (a1);
#define LOAD_REGS_1 \
register int _d1 asm ("d1") = __arg1; \
LOAD_REGS_0
#define ASM_ARGS_1 ASM_ARGS_0, "d" (_d1) #define ASM_ARGS_1 ASM_ARGS_0, "d" (_d1)
#define LOAD_ARGS_2(a1, a2) \ #define LOAD_ARGS_2(a1, a2) \
register int _d2 asm ("d2") = (int) (a2); \ LOAD_ARGS_1 (a1) \
LOAD_ARGS_1 (a1) int __arg2 = (int) (a2);
#define LOAD_REGS_2 \
register int _d2 asm ("d2") = __arg2; \
LOAD_REGS_1
#define ASM_ARGS_2 ASM_ARGS_1, "d" (_d2) #define ASM_ARGS_2 ASM_ARGS_1, "d" (_d2)
#define LOAD_ARGS_3(a1, a2, a3) \ #define LOAD_ARGS_3(a1, a2, a3) \
register int _d3 asm ("d3") = (int) (a3); \ LOAD_ARGS_2 (a1, a2) \
LOAD_ARGS_2 (a1, a2) int __arg3 = (int) (a3);
#define LOAD_REGS_3 \
register int _d3 asm ("d3") = __arg3; \
LOAD_REGS_2
#define ASM_ARGS_3 ASM_ARGS_2, "d" (_d3) #define ASM_ARGS_3 ASM_ARGS_2, "d" (_d3)
#define LOAD_ARGS_4(a1, a2, a3, a4) \ #define LOAD_ARGS_4(a1, a2, a3, a4) \
register int _d4 asm ("d4") = (int) (a4); \ LOAD_ARGS_3 (a1, a2, a3) \
LOAD_ARGS_3 (a1, a2, a3) int __arg4 = (int) (a4);
#define LOAD_REGS_4 \
register int _d4 asm ("d4") = __arg4; \
LOAD_REGS_3
#define ASM_ARGS_4 ASM_ARGS_3, "d" (_d4) #define ASM_ARGS_4 ASM_ARGS_3, "d" (_d4)
#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \ #define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
register int _d5 asm ("d5") = (int) (a5); \ LOAD_ARGS_4 (a1, a2, a3, a4) \
LOAD_ARGS_4 (a1, a2, a3, a4) int __arg5 = (int) (a5);
#define LOAD_REGS_5 \
register int _d5 asm ("d5") = __arg5; \
LOAD_REGS_4
#define ASM_ARGS_5 ASM_ARGS_4, "d" (_d5) #define ASM_ARGS_5 ASM_ARGS_4, "d" (_d5)
#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \ #define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
register int _a0 asm ("a0") = (int) (a6); \ LOAD_ARGS_5 (a1, a2, a3, a4, a5) \
LOAD_ARGS_5 (a1, a2, a3, a4, a5) int __arg6 = (int) (a6);
#define LOAD_REGS_6 \
register int _a0 asm ("a0") = __arg6; \
LOAD_REGS_5
#define ASM_ARGS_6 ASM_ARGS_5, "a" (_a0) #define ASM_ARGS_6 ASM_ARGS_5, "a" (_a0)
#endif /* not __ASSEMBLER__ */ #endif /* not __ASSEMBLER__ */