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powerpc: Use Linux kABI for syscall return

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It changes the powerpc INTERNAL_VSYSCALL_CALL and INTERNAL_SYSCALL_NCS
to return a negative value instead of the returning the CR value in
the 'err' macro argument.

The macro INTERNAL_SYSCALL_DECL is no longer required, and the
INTERNAL_SYSCALL_ERROR_P macro follows the other Linux kABIs.

Checked on powerpc64-linux-gnu, powerpc64le-linux-gnu, and
powerpc-linux-gnu-power4.
This commit is contained in:
Adhemerval Zanella 2020-02-02 20:45:58 -03:00
parent cd72a13f22
commit e26b8a008a
1 changed files with 5 additions and 7 deletions
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12
sysdeps/unix/sysv/linux/powerpc/sysdep.h
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@ -57,9 +57,8 @@
: "+r" (r0), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), \
"+r" (r7), "+r" (r8) \
: : "r9", "r10", "r11", "r12", "cr0", "ctr", "lr", "memory"); \
err = (long int) r0; \
__asm__ __volatile__ ("" : "=r" (rval) : "r" (r3)); \
rval; \
(long int) r0 & (1 << 28) ? -rval : rval; \
})
#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
@ -107,21 +106,20 @@
: ASM_INPUT_##nr \
: "r9", "r10", "r11", "r12", \
"cr0", "ctr", "memory"); \
err = r0; \
r3; \
r0 & (1 << 28) ? -r3 : r3; \
})
#define INTERNAL_SYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL_NCS (__NR_##name, err, nr, args)
#undef INTERNAL_SYSCALL_DECL
#define INTERNAL_SYSCALL_DECL(err) long int err __attribute__ ((unused))
#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
#undef INTERNAL_SYSCALL_ERROR_P
#define INTERNAL_SYSCALL_ERROR_P(val, err) \
((void) (val), __builtin_expect ((err) & (1 << 28), 0))
((unsigned long int) (val) > -4096UL)
#undef INTERNAL_SYSCALL_ERRNO
#define INTERNAL_SYSCALL_ERRNO(val, err) (val)
#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
#if defined(__PPC64__) || defined(__powerpc64__)
# define SYSCALL_ARG_SIZE 8