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authorWaldemar Brodkorb <wbx@openadk.org>2015-03-08 10:59:07 -0500
committerWaldemar Brodkorb <wbx@openadk.org>2015-03-08 14:02:59 -0500
commita22b1f00846fb4dc09fe8ddc32a44152875af7c2 (patch)
tree54884a15ca2a53ff5b176f98aacfa43ac81295fd /libc/sysdeps/linux/arm/bits
parent4123d99677a8e5872f947e8a444f3481c71ab759 (diff)
fix regression for ARM thumb mode
Sync with GNU libc, see here why r7 is not usable for thumb mode: https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/arm/sysdep.h;h=37eac192b1e2e7f53f112b16450b9ce57054e27f;hb=HEAD Remove old OABI support. Fixes build breakage for ARM noMMU builds. Still no runtime testing.
Diffstat (limited to 'libc/sysdeps/linux/arm/bits')
-rw-r--r--libc/sysdeps/linux/arm/bits/syscalls.h56
1 files changed, 20 insertions, 36 deletions
diff --git a/libc/sysdeps/linux/arm/bits/syscalls.h b/libc/sysdeps/linux/arm/bits/syscalls.h
index 6b747d91b..778cc3453 100644
--- a/libc/sysdeps/linux/arm/bits/syscalls.h
+++ b/libc/sysdeps/linux/arm/bits/syscalls.h
@@ -43,41 +43,7 @@
}) \
)
-#if !defined(__thumb__)
-#if defined(__ARM_EABI__)
-#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
-(__extension__ \
- ({unsigned int __internal_sys_result; \
- { \
- register int __a1 __asm__ ("r0"), _nr __asm__ ("r7"); \
- LOAD_ARGS_##nr (args) \
- _nr = (name); \
- __asm__ __volatile__ ("swi 0x0 @ syscall " #name \
- : "=r" (__a1) \
- : "r" (_nr) ASM_ARGS_##nr \
- : "memory"); \
- __internal_sys_result = __a1; \
- } \
- (int) __internal_sys_result; }) \
-)
-#else /* defined(__ARM_EABI__) */
-
-#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
-(__extension__ \
- ({ unsigned int __internal_sys_result; \
- { \
- register int __a1 __asm__ ("a1"); \
- LOAD_ARGS_##nr (args) \
- __asm__ __volatile__ ("swi %1 @ syscall " #name \
- : "=r" (__a1) \
- : "i" (name) ASM_ARGS_##nr \
- : "memory"); \
- __internal_sys_result = __a1; \
- } \
- (int) __internal_sys_result; }) \
-)
-#endif
-#else /* !defined(__thumb__) */
+#if defined(__thumb__)
/* We can't use push/pop inside the asm because that breaks
unwinding (ie. thread cancellation).
*/
@@ -101,7 +67,23 @@
} \
(int) __internal_sys_result; }) \
)
-#endif /*!defined(__thumb__)*/
+#else /* ARM */
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
+(__extension__ \
+ ({unsigned int __internal_sys_result; \
+ { \
+ register int __a1 __asm__ ("r0"), _nr __asm__ ("r7"); \
+ LOAD_ARGS_##nr (args) \
+ _nr = (name); \
+ __asm__ __volatile__ ("swi 0x0 @ syscall " #name \
+ : "=r" (__a1) \
+ : "r" (_nr) ASM_ARGS_##nr \
+ : "memory"); \
+ __internal_sys_result = __a1; \
+ } \
+ (int) __internal_sys_result; }) \
+)
+#endif
#define INTERNAL_SYSCALL_ERROR_P(val, err) \
((unsigned int) (val) >= 0xfffff001u)
@@ -138,11 +120,13 @@
LOAD_ARGS_5 (a1, a2, a3, a4, a5) \
register int _v2 __asm__ ("v2") = _v2tmp;
#define ASM_ARGS_6 ASM_ARGS_5, "r" (_v2)
+#ifndef __thumb__
#define LOAD_ARGS_7(a1, a2, a3, a4, a5, a6, a7) \
int _v3tmp = (int) (a7); \
LOAD_ARGS_6 (a1, a2, a3, a4, a5, a6) \
register int _v3 __asm__ ("v3") = _v3tmp;
#define ASM_ARGS_7 ASM_ARGS_6, "r" (_v3)
+#endif
#endif /* __ASSEMBLER__ */