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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2020-02-03 12:00:19 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2020-02-14 21:09:12 -0300
commit861be5fd6601bed58b63ae0eb23097abf1ac0e1c (patch)
tree68ef62a9898692a0aef9d5c192266dcb70285f25 /sysdeps
parentcf1e05f5990aba073864cd0bc681cd017e663351 (diff)
downloadglibc-861be5fd6601bed58b63ae0eb23097abf1ac0e1c.tar.gz
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nios2: Use Linux kABI for syscall return
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.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/nios2/sysdep.h10
1 files changed, 5 insertions, 5 deletions
diff --git a/sysdeps/unix/sysv/linux/nios2/sysdep.h b/sysdeps/unix/sysv/linux/nios2/sysdep.h
index b02730bd23..ae2f2a583f 100644
--- a/sysdeps/unix/sysv/linux/nios2/sysdep.h
+++ b/sysdeps/unix/sysv/linux/nios2/sysdep.h
@@ -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; })