diff options
| author | Waldemar Brodkorb <wbx@openadk.org> | 2015-03-08 10:59:07 -0500 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2015-03-08 14:02:59 -0500 |
| commit | a22b1f00846fb4dc09fe8ddc32a44152875af7c2 (patch) | |
| tree | 54884a15ca2a53ff5b176f98aacfa43ac81295fd /libc/sysdeps/linux/arm/bits/syscalls.h | |
| parent | 4123d99677a8e5872f947e8a444f3481c71ab759 (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/syscalls.h')
| -rw-r--r-- | libc/sysdeps/linux/arm/bits/syscalls.h | 56 |
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__ */ |