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Diffstat (limited to 'libc/sysdeps/linux/i386/bits/syscalls.h')
-rw-r--r--libc/sysdeps/linux/i386/bits/syscalls.h42
1 files changed, 27 insertions, 15 deletions
diff --git a/libc/sysdeps/linux/i386/bits/syscalls.h b/libc/sysdeps/linux/i386/bits/syscalls.h
index d612071b4..eb77ea8d0 100644
--- a/libc/sysdeps/linux/i386/bits/syscalls.h
+++ b/libc/sysdeps/linux/i386/bits/syscalls.h
@@ -15,6 +15,13 @@
#define SYS_ify(syscall_name) (__NR_##syscall_name)
+#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
+
+#define INTERNAL_SYSCALL_ERROR_P(val, err) \
+ ((unsigned int) (val) >= 0xfffff001u)
+
+#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
+
/* We need some help from the assembler to generate optimal code. We
define some macros here which later will be used. */
@@ -145,24 +152,29 @@ type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5, type6 arg6) \
{ \
return (type) (INLINE_SYSCALL(name, 6, arg1, arg2, arg3, arg4, arg5, arg6)); \
}
-
#define INLINE_SYSCALL(name, nr, args...) \
- ({ \
- unsigned int resultvar; \
- __asm__ __volatile__ ( \
- LOADARGS_##nr \
- "movl %1, %%eax\n\t" \
- "int $0x80\n\t" \
- RESTOREARGS_##nr \
- : "=a" (resultvar) \
- : "i" (__NR_##name) ASMFMT_##nr(args) : "memory", "cc"); \
- if (resultvar >= 0xfffff001) \
- { \
- __set_errno (-resultvar); \
- resultvar = 0xffffffff; \
- } \
+ ({ \
+ unsigned int result = INTERNAL_SYSCALL (name, , nr, args); \
+ if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, ), 0)) \
+ { \
+ __set_errno (INTERNAL_SYSCALL_ERRNO (result, )); \
+ result = 0xffffffff; \
+ } \
+ (int) result; })
+
+#define INTERNAL_SYSCALL(name, err, nr, args...) \
+ ({ \
+ unsigned int resultvar; \
+ __asm__ __volatile__ ( \
+ LOADARGS_##nr \
+ "movl %1, %%eax\n\t" \
+ "int $0x80\n\t" \
+ RESTOREARGS_##nr \
+ : "=a" (resultvar) \
+ : "i" (__NR_##name) ASMFMT_##nr(args) : "memory", "cc"); \
(int) resultvar; })
+
#define LOADARGS_0
#define LOADARGS_1 \
"bpushl .L__X'%k2, %k2\n\t" \