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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))
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
}
arm: add vdso support vdso will be available on arm in linux v4.2, the user-space code for it is in kernel commit 8512287a8165592466cb9cb347ba94892e9c56a5
2015-06-03 09:32:14 +00:00
#define VDSO_USEFUL
#define VDSO_CGT_SYM "__vdso_clock_gettime"
#define VDSO_CGT_VER "LINUX_2.6"
fix posix_fadvise syscall args on powerpc, unify with arm fix commit 6d38c9cf80f47623e5e48190046673bbd0dc410b provided an arm-specific version of posix_fadvise to address the alternate argument order the kernel expects on arm, but neglected to address that powerpc (32-bit) has the same issue. instead of having arch variant files in duplicate, simply put the alternate version in the top-level file under the control of a macro defined in syscall_arch.h.
2016-07-01 17:32:35 +00:00
#define SYSCALL_FADVISE_6_ARG
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