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musl/arch/arm/syscall_arch.h

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syscall organization overhaul 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.
2012-09-09 02:43:14 +00:00
#define __SYSCALL_LL_E(x) \
((union { long long ll; long l[2]; }){ .ll = x }).l[0], \
((union { long long ll; long l[2]; }){ .ll = x }).l[1]
#define __SYSCALL_LL_O(x) 0, __SYSCALL_LL_E((x))
#define __SYSCALL_SSLEN 8
inline syscall support for arm most pure-syscall-wrapper functions compile to the smallest/simplest code possible (save r7 ; load syscall # ; svc 0 ; restore r7 ; tail call to __syscall_ret).
2012-09-09 05:29:19 +00:00
#ifndef __clang__
#define __asm_syscall(...) do { \
__asm__ __volatile__ ( "svc 0" \
: "=r"(r0) : __VA_ARGS__ : "memory"); \
return r0; \
} while (0)
static inline long __syscall0(long n)
{
register long r7 __asm__("r7") = n;
register long r0 __asm__("r0");
__asm_syscall("r"(r7));
}
static inline long __syscall1(long n, long a)
{
register long r7 __asm__("r7") = n;
register long r0 __asm__("r0") = a;
fix syscall asm constraints for arm too no problems were detected so far, but the constraints seem to have been invalid just like the mips ones.
2012-09-15 07:19:41 +00:00
__asm_syscall("r"(r7), "0"(r0));
inline syscall support for arm most pure-syscall-wrapper functions compile to the smallest/simplest code possible (save r7 ; load syscall # ; svc 0 ; restore r7 ; tail call to __syscall_ret).
2012-09-09 05:29:19 +00:00
}
static inline long __syscall2(long n, long a, long b)
{
register long r7 __asm__("r7") = n;
register long r0 __asm__("r0") = a;
register long r1 __asm__("r1") = b;
fix syscall asm constraints for arm too no problems were detected so far, but the constraints seem to have been invalid just like the mips ones.
2012-09-15 07:19:41 +00:00
__asm_syscall("r"(r7), "0"(r0), "r"(r1));
inline syscall support for arm most pure-syscall-wrapper functions compile to the smallest/simplest code possible (save r7 ; load syscall # ; svc 0 ; restore r7 ; tail call to __syscall_ret).
2012-09-09 05:29:19 +00:00
}
static inline long __syscall3(long n, long a, long b, long c)
{
register long r7 __asm__("r7") = n;
register long r0 __asm__("r0") = a;
register long r1 __asm__("r1") = b;
register long r2 __asm__("r2") = c;
fix syscall asm constraints for arm too no problems were detected so far, but the constraints seem to have been invalid just like the mips ones.
2012-09-15 07:19:41 +00:00
__asm_syscall("r"(r7), "0"(r0), "r"(r1), "r"(r2));
inline syscall support for arm most pure-syscall-wrapper functions compile to the smallest/simplest code possible (save r7 ; load syscall # ; svc 0 ; restore r7 ; tail call to __syscall_ret).
2012-09-09 05:29:19 +00:00
}
static inline long __syscall4(long n, long a, long b, long c, long d)
{
register long r7 __asm__("r7") = n;
register long r0 __asm__("r0") = a;
register long r1 __asm__("r1") = b;
register long r2 __asm__("r2") = c;
register long r3 __asm__("r3") = d;
fix syscall asm constraints for arm too no problems were detected so far, but the constraints seem to have been invalid just like the mips ones.
2012-09-15 07:19:41 +00:00
__asm_syscall("r"(r7), "0"(r0), "r"(r1), "r"(r2), "r"(r3));
inline syscall support for arm most pure-syscall-wrapper functions compile to the smallest/simplest code possible (save r7 ; load syscall # ; svc 0 ; restore r7 ; tail call to __syscall_ret).
2012-09-09 05:29:19 +00:00
}
#else
syscall organization overhaul 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.
2012-09-09 02:43:14 +00:00
static inline long __syscall0(long n)
{
return (__syscall)(n);
}
static inline long __syscall1(long n, long a)
{
return (__syscall)(n, a);
}
static inline long __syscall2(long n, long a, long b)
{
return (__syscall)(n, a, b);
}
static inline long __syscall3(long n, long a, long b, long c)
{
return (__syscall)(n, a, b, c);
}
static inline long __syscall4(long n, long a, long b, long c, long d)
{
return (__syscall)(n, a, b, c, d);
}
inline syscall support for arm most pure-syscall-wrapper functions compile to the smallest/simplest code possible (save r7 ; load syscall # ; svc 0 ; restore r7 ; tail call to __syscall_ret).
2012-09-09 05:29:19 +00:00
#endif
syscall organization overhaul 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.
2012-09-09 02:43:14 +00:00
static inline long __syscall5(long n, long a, long b, long c, long d, long e)
{
return (__syscall)(n, a, b, c, d, e);
}
static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
{
return (__syscall)(n, a, b, c, d, e, f);
}