musl/arch/m68k/syscall_arch.h
Rich Felker 0cd2be2314 work around broken kernel struct ipc_perm on some big endian archs
the mode member of struct ipc_perm is specified by POSIX to have type
mode_t, which is uniformly defined as unsigned int. however, Linux
defines it with type __kernel_mode_t, and defines __kernel_mode_t as
unsigned short on some archs. since there is a subsequent padding
field, treating it as a 32-bit unsigned int works on little endian
archs, but the order is backwards on big endian archs with the
erroneous definition.

since multiple archs are affected, remedy the situation with fixup
code in the affected functions (shmctl, semctl, and msgctl) rather
than repeating the same shims in syscall_arch.h for every affected
arch.
2018-06-20 00:07:09 -04:00

92 lines
2.7 KiB
C

#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) __SYSCALL_LL_E((x))
static __inline long __syscall0(long n)
{
register unsigned long d0 __asm__("d0") = n;
__asm__ __volatile__ ("trap #0" : "+r"(d0)
:
: "memory");
return d0;
}
static inline long __syscall1(long n, long a)
{
register unsigned long d0 __asm__("d0") = n;
register unsigned long d1 __asm__("d1") = a;
__asm__ __volatile__ ("trap #0" : "+r"(d0)
: "r"(d1)
: "memory");
return d0;
}
static inline long __syscall2(long n, long a, long b)
{
register unsigned long d0 __asm__("d0") = n;
register unsigned long d1 __asm__("d1") = a;
register unsigned long d2 __asm__("d2") = b;
__asm__ __volatile__ ("trap #0" : "+r"(d0)
: "r"(d1), "r"(d2)
: "memory");
return d0;
}
static inline long __syscall3(long n, long a, long b, long c)
{
register unsigned long d0 __asm__("d0") = n;
register unsigned long d1 __asm__("d1") = a;
register unsigned long d2 __asm__("d2") = b;
register unsigned long d3 __asm__("d3") = c;
__asm__ __volatile__ ("trap #0" : "+r"(d0)
: "r"(d1), "r"(d2), "r"(d3)
: "memory");
return d0;
}
static inline long __syscall4(long n, long a, long b, long c, long d)
{
register unsigned long d0 __asm__("d0") = n;
register unsigned long d1 __asm__("d1") = a;
register unsigned long d2 __asm__("d2") = b;
register unsigned long d3 __asm__("d3") = c;
register unsigned long d4 __asm__("d4") = d;
__asm__ __volatile__ ("trap #0" : "+r"(d0)
: "r"(d1), "r"(d2), "r"(d3), "r"(d4)
: "memory");
return d0;
}
static inline long __syscall5(long n, long a, long b, long c, long d, long e)
{
register unsigned long d0 __asm__("d0") = n;
register unsigned long d1 __asm__("d1") = a;
register unsigned long d2 __asm__("d2") = b;
register unsigned long d3 __asm__("d3") = c;
register unsigned long d4 __asm__("d4") = d;
register unsigned long d5 __asm__("d5") = e;
__asm__ __volatile__ ("trap #0" : "+r"(d0)
: "r"(d1), "r"(d2), "r"(d3), "r"(d4), "r"(d5)
: "memory");
return d0;
}
static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
{
register unsigned long d0 __asm__("d0") = n;
register unsigned long d1 __asm__("d1") = a;
register unsigned long d2 __asm__("d2") = b;
register unsigned long d3 __asm__("d3") = c;
register unsigned long d4 __asm__("d4") = d;
register unsigned long d5 __asm__("d5") = e;
register unsigned long a0 __asm__("a0") = f;
__asm__ __volatile__ ("trap #0" : "+r"(d0)
: "r"(d1), "r"(d2), "r"(d3), "r"(d4), "r"(d5), "r"(a0)
: "memory");
return d0;
}
#define SYSCALL_USE_SOCKETCALL
#define SYSCALL_IPC_BROKEN_MODE