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syscall organization overhaul

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now public syscall.h only exposes __NR_* and SYS_* constants and the
variadic syscall function. no macros or inline functions, no
__syscall_ret or other internal details, no 16-/32-bit legacy syscall
renaming, etc. this logic has all been moved to src/internal/syscall.h
with the arch-specific parts in arch/$(ARCH)/syscall_arch.h, and the
amount of arch-specific stuff has been reduced to a minimum.

changes still need to be reviewed/double-checked. minimal testing on
i386 and mips has already been performed.
This commit is contained in:
Rich Felker 2012-09-08 22:43:14 -04:00
commit 208eb584ef
10 changed files with 420 additions and 655 deletions
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68
arch/x86_64/bits/syscall.h
View file

@ -1,71 +1,3 @@
#define __SYSCALL_LL_E(x) (x)
#define __SYSCALL_LL_O(x) (x)
#define __SYSCALL_SSLEN 8
static __inline long __syscall0(long __n)
{
unsigned long __ret;
__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n) : "rcx", "r11", "memory");
return __ret;
}
static __inline long __syscall1(long __n, long __a1)
{
unsigned long __ret;
__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n), "D"(__a1) : "rcx", "r11", "memory");
return __ret;
}
static __inline long __syscall2(long __n, long __a1, long __a2)
{
unsigned long __ret;
__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n), "D"(__a1), "S"(__a2)
: "rcx", "r11", "memory");
return __ret;
}
static __inline long __syscall3(long __n, long __a1, long __a2, long __a3)
{
unsigned long __ret;
__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n), "D"(__a1), "S"(__a2),
"d"(__a3) : "rcx", "r11", "memory");
return __ret;
}
static __inline long __syscall4(long __n, long __a1, long __a2, long __a3, long __a4)
{
unsigned long __ret;
register long __r10 __asm__("r10") = __a4;
__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n), "D"(__a1), "S"(__a2),
"d"(__a3), "r"(__r10): "rcx", "r11", "memory");
return __ret;
}
static __inline long __syscall5(long __n, long __a1, long __a2, long __a3, long __a4, long __a5)
{
unsigned long __ret;
register long __r10 __asm__("r10") = __a4;
register long __r8 __asm__("r8") = __a5;
__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n), "D"(__a1), "S"(__a2),
"d"(__a3), "r"(__r10), "r"(__r8) : "rcx", "r11", "memory");
return __ret;
}
static __inline long __syscall6(long __n, long __a1, long __a2, long __a3, long __a4, long __a5, long __a6)
{
unsigned long __ret;
register long __r10 __asm__("r10") = __a4;
register long __r8 __asm__("r8") = __a5;
register long __r9 __asm__("r9") = __a6;
__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n), "D"(__a1), "S"(__a2),
"d"(__a3), "r"(__r10), "r"(__r8), "r"(__r9) : "rcx", "r11", "memory");
return __ret;
}
#define __socketcall(nm,a,b,c,d,e,f) syscall(__NR_##nm, a, b, c, d, e, f)
#define __socketcall_cp(nm,a,b,c,d,e,f) syscall_cp(__NR_##nm, a, b, c, d, e, f)
#define __NR_read 0
#define __NR_write 1
#define __NR_open 2