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nios2: Use Linux kABI for syscall return

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It changes the nios INTERNAL_SYSCALL_RAW macro to return a negative
value instead of the 'r2' register value on 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 with a build against nios2-linux-gnu.
This commit is contained in:
Adhemerval Zanella 2020-02-03 12:00:19 -03:00
parent cf1e05f599
commit 861be5fd66
1 changed files with 5 additions and 5 deletions
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10
sysdeps/unix/sysv/linux/nios2/sysdep.h
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@ -157,13 +157,14 @@
(int) result_var; })
#undef INTERNAL_SYSCALL_DECL
#define INTERNAL_SYSCALL_DECL(err) unsigned 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), (unsigned int) (err))
#define INTERNAL_SYSCALL_ERROR_P(val, err) \
((unsigned long int) (val) > -4096UL)
#undef INTERNAL_SYSCALL_ERRNO
#define INTERNAL_SYSCALL_ERRNO(val, err) ((void) (err), val)
#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
#undef INTERNAL_SYSCALL_RAW
#define INTERNAL_SYSCALL_RAW(name, err, nr, args...) \
@ -180,8 +181,7 @@
: "+r" (_r2), "=r" (_err) \
: ASM_ARGS_##nr \
: __SYSCALL_CLOBBERS); \
_sys_result = _r2; \
err = _err; \
_sys_result = _err != 0 ? -_r2 : -_r2; \
} \
(int) _sys_result; })