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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))
fixup general __syscall breakage introduced in x32 port the reordering of headers caused some risc archs to not see the __syscall declaration anymore. this caused build errors on mips with any compiler, and on arm and microblaze with clang. we now declare it locally just like the powerpc port does.
2014-02-24 21:49:42 +00:00
long (__syscall)(long, ...);
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
#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
}
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)
{
inline 5- and 6-argument syscalls on arm
2014-11-23 02:06:40 +00:00
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;
register long r4 __asm__("r4") = e;
__asm_syscall("r"(r7), "0"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4));
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/$(ARCH)/syscall_arch.h, and the amount of arch-specific stuff has been reduced to a minimum. changes still need to be reviewed/double-checked. minimal testing on i386 and mips has already been performed.
2012-09-09 02:43:14 +00:00
}
static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
{
inline 5- and 6-argument syscalls on arm
2014-11-23 02:06:40 +00:00
register long r7 __asm__("r7") = n;
register long r0 __asm__("r0") = a;
register long r1 __asm__("r1") = b;
register long r2 __asm__("r2") = c;
register long r3 __asm__("r3") = d;
register long r4 __asm__("r4") = e;
register long r5 __asm__("r5") = f;
__asm_syscall("r"(r7), "0"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5));
syscall organization overhaul now public syscall.h only exposes __NR_* and SYS_* constants and the variadic syscall function. no macros or inline functions, no __syscall_ret or other internal details, no 16-/32-bit legacy syscall renaming, etc. this logic has all been moved to src/internal/syscall.h with the arch-specific parts in arch/$(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
}