diff options
Diffstat (limited to 'libc/sysdeps')
| -rw-r--r-- | libc/sysdeps/linux/m68k/bits/syscalls.h | 290 |
1 files changed, 154 insertions, 136 deletions
diff --git a/libc/sysdeps/linux/m68k/bits/syscalls.h b/libc/sysdeps/linux/m68k/bits/syscalls.h index c833cf777..777ff70c3 100644 --- a/libc/sysdeps/linux/m68k/bits/syscalls.h +++ b/libc/sysdeps/linux/m68k/bits/syscalls.h @@ -13,64 +13,8 @@ # define __set_errno(val) (*__errno_location ()) = (val) #endif -/* - Some of the sneaky macros in the code were taken from - glibc-2.2.5/sysdeps/unix/sysv/linux/m68k/sysdep.h -*/ - #ifndef __ASSEMBLER__ -#undef _syscall0 -#define _syscall0(type,name) \ -type name(void) \ -{ \ -return (type) (INLINE_SYSCALL(name, 0)); \ -} - -#undef _syscall1 -#define _syscall1(type,name,type1,arg1) \ -type name(type1 arg1) \ -{ \ -return (type) (INLINE_SYSCALL(name, 1, arg1)); \ -} - -#undef _syscall2 -#define _syscall2(type,name,type1,arg1,type2,arg2) \ -type name(type1 arg1,type2 arg2) \ -{ \ -return (type) (INLINE_SYSCALL(name, 2, arg1, arg2)); \ -} - -#undef _syscall3 -#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \ -type name(type1 arg1,type2 arg2,type3 arg3) \ -{ \ -return (type) (INLINE_SYSCALL(name, 3, arg1, arg2, arg3)); \ -} - -#undef _syscall4 -#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \ -type name (type1 arg1, type2 arg2, type3 arg3, type4 arg4) \ -{ \ -return (type) (INLINE_SYSCALL(name, 4, arg1, arg2, arg3, arg4)); \ -} - -#undef _syscall5 -#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \ - type5,arg5) \ -type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \ -{ \ -return (type) (INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5)); \ -} - -#undef _syscall6 -#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \ - type5,arg5,type6,arg6) \ -type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \ -{ \ -return (type) (INLINE_SYSCALL(name, 6, arg1, arg2, arg3, arg4, arg5, arg6)); \ -} - /* Linux takes system call arguments in registers: syscall number %d0 call-clobbered @@ -96,86 +40,160 @@ return (type) (INLINE_SYSCALL(name, 6, arg1, arg2, arg3, arg4, arg5, arg6)); \ speed is more important, we don't use movem. Since %a0 and %a1 are scratch registers, we can use them for saving as well. */ -#undef INLINE_SYSCALL -#define INLINE_SYSCALL(name, nr, args...) \ - ({ unsigned int _sys_result = INTERNAL_SYSCALL (name, , nr, args); \ - if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sys_result, ), 0))\ - { \ - __set_errno (INTERNAL_SYSCALL_ERRNO (_sys_result, )); \ - _sys_result = (unsigned int) -1; \ - } \ - (int) _sys_result; }) - -#undef INTERNAL_SYSCALL -#define INTERNAL_SYSCALL(name, err, nr, args...) \ - ({ 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_REGS_##nr \ - register int _d0 asm ("%d0") = __NR_##name; \ - asm volatile ("trap #0" \ - : "=d" (_d0) \ - : "0" (_d0) ASM_ARGS_##nr \ - : "memory"); \ - _sys_result = _d0; \ - } \ - (int) _sys_result; }) - -#undef INTERNAL_SYSCALL_ERROR_P -#define INTERNAL_SYSCALL_ERROR_P(val, err) \ - ((unsigned int) (val) >= -4095U) - -#undef INTERNAL_SYSCALL_ERRNO -#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val)) - -#define LOAD_ARGS_0() -#define LOAD_REGS_0 -#define ASM_ARGS_0 -#define LOAD_ARGS_1(a1) \ - 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 LOAD_ARGS_2(a1, a2) \ - 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 LOAD_ARGS_3(a1, a2, a3) \ - 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 LOAD_ARGS_4(a1, a2, a3, a4) \ - 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 LOAD_ARGS_5(a1, a2, a3, a4, a5) \ - 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 LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \ - 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 __syscall_return(type, res) \ +do { \ + if ((unsigned long)(res) >= (unsigned long)(-125)) { \ + /* avoid using res which is declared to be in register d0; \ + errno might expand to a function call and clobber it. */ \ + int __err = -(res); \ + __set_errno(__err); \ + res = -1; \ + } \ + return (type) (res); \ +} while (0) + +#define _syscall0(type, name) \ +type name(void) \ +{ \ + long __res; \ + __asm__ __volatile__ ( \ + "movel %1, %%d0\n\t" \ + "trap #0\n\t" \ + "movel %%d0, %0" \ + : "=g" (__res) \ + : "i" (__NR_##name) \ + : "cc", "%d0"); \ + __syscall_return(type, __res); \ +} + +#define _syscall1(type, name, atype, a) \ +type name(atype a) \ +{ \ + long __res; \ + __asm__ __volatile__ ( \ + "movel %2, %%d1\n\t" \ + "movel %1, %%d0\n\t" \ + "trap #0\n\t" \ + "movel %%d0, %0" \ + : "=g" (__res) \ + : "i" (__NR_##name), \ + "g" ((long)a) \ + : "cc", "%d0", "%d1"); \ + __syscall_return(type, __res); \ +} + +#define _syscall2(type, name, atype, a, btype, b) \ +type name(atype a, btype b) \ +{ \ + long __res; \ + __asm__ __volatile__ ( \ + "movel %3, %%d2\n\t" \ + "movel %2, %%d1\n\t" \ + "movel %1, %%d0\n\t" \ + "trap #0\n\t" \ + "movel %%d0, %0" \ + : "=g" (__res) \ + : "i" (__NR_##name), \ + "a" ((long)a), \ + "g" ((long)b) \ + : "cc", "%d0", "%d1", "%d2"); \ + __syscall_return(type, __res); \ +} + +#define _syscall3(type, name, atype, a, btype, b, ctype, c) \ +type name(atype a, btype b, ctype c) \ +{ \ + long __res; \ + __asm__ __volatile__ ( \ + "movel %4, %%d3\n\t" \ + "movel %3, %%d2\n\t" \ + "movel %2, %%d1\n\t" \ + "movel %1, %%d0\n\t" \ + "trap #0\n\t" \ + "movel %%d0, %0" \ + : "=g" (__res) \ + : "i" (__NR_##name), \ + "a" ((long)a), \ + "a" ((long)b), \ + "g" ((long)c) \ + : "cc", "%d0", "%d1", "%d2", "%d3"); \ + __syscall_return(type, __res); \ +} + +#define _syscall4(type, name, atype, a, btype, b, ctype, c, dtype, d) \ +type name(atype a, btype b, ctype c, dtype d) \ +{ \ + long __res; \ + __asm__ __volatile__ ( \ + "movel %5, %%d4\n\t" \ + "movel %4, %%d3\n\t" \ + "movel %3, %%d2\n\t" \ + "movel %2, %%d1\n\t" \ + "movel %1, %%d0\n\t" \ + "trap #0\n\t" \ + "movel %%d0, %0" \ + : "=g" (__res) \ + : "i" (__NR_##name), \ + "a" ((long)a), \ + "a" ((long)b), \ + "a" ((long)c), \ + "g" ((long)d) \ + : "cc", "%d0", "%d1", "%d2", "%d3", \ + "%d4"); \ + __syscall_return(type, __res); \ +} + +#define _syscall5(type, name, atype, a, btype, b, ctype, c, dtype, d, etype, e) \ +type name(atype a, btype b, ctype c, dtype d, etype e) \ +{ \ + long __res; \ + __asm__ __volatile__ ( \ + "movel %6, %%d5\n\t" \ + "movel %5, %%d4\n\t" \ + "movel %4, %%d3\n\t" \ + "movel %3, %%d2\n\t" \ + "movel %2, %%d1\n\t" \ + "movel %1, %%d0\n\t" \ + "trap #0\n\t" \ + "movel %%d0, %0" \ + : "=g" (__res) \ + : "i" (__NR_##name), \ + "a" ((long)a), \ + "a" ((long)b), \ + "a" ((long)c), \ + "a" ((long)d), \ + "g" ((long)e) \ + : "cc", "%d0", "%d1", "%d2", "%d3", \ + "%d4", "%d5"); \ + __syscall_return(type, __res); \ +} + +#define _syscall6(type, name, atype, a, btype, b, ctype, c, dtype, d, etype, e, ftype, f) \ +type name(atype a, btype b, ctype c, dtype d, etype e, ftype f) \ +{ \ + long __res; \ + __asm__ __volatile__ ( \ + "movel %7, %%a0\n\t" \ + "movel %6, %%d5\n\t" \ + "movel %5, %%d4\n\t" \ + "movel %4, %%d3\n\t" \ + "movel %3, %%d2\n\t" \ + "movel %2, %%d1\n\t" \ + "movel %1, %%d0\n\t" \ + "trap #0\n\t" \ + "movel %%d0, %0" \ + : "=g" (__res) \ + : "i" (__NR_##name), \ + "a" ((long)a), \ + "a" ((long)b), \ + "a" ((long)c), \ + "a" ((long)d), \ + "a" ((long)e), \ + "g" ((long)f) \ + : "cc", "%d0", "%d1", "%d2", "%d3", \ + "%d4", "%d5", "%a0"); \ + __syscall_return(type, __res); \ +} #endif /* __ASSEMBLER__ */ #endif /* _BITS_SYSCALLS_H */ |