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| author | Romain Naour <romain.naour@gmail.com> | 2020-05-08 18:39:45 +0200 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2020-05-17 12:07:55 +0200 |
| commit | 85ec6b449f32a9c49bfbff1d1a115c318c38c88b (patch) | |
| tree | 51be0d5fd1672fcc229e4ae0ae217f9ee97fbb81 /libc | |
| parent | 40a337ce799d936ed483dfbf348bc9528b34c6ed (diff) | |
mips: Do not include hi and lo in __SYSCALL_CLOBBERS for R6
From [1]
"GCC 10 (PR 91233) won't silently allow registers that are not architecturally
available to be present in the clobber list anymore, resulting in build failure
for mips*r6 targets in form of:
...
.../sysdep.h:146:2: error: the register ‘lo’ cannot be clobbered in ‘asm’ for the current target
146 | __asm__ volatile ( \
| ^~~~~~~
This is because base R6 ISA doesn't define hi and lo registers w/o DSP extension.
This patch provides the alternative definitions of __SYSCALL_CLOBBERS for r6
targets that won't include those registers."
[1] https://sourceware.org/git/?p=glibc.git;a=commit;h=020b2a97bb15f807c0482f0faee2184ed05bcad8
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Waldemar Brodkorb <wbx@openadk.org>
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/sysdeps/linux/mips/bits/syscalls.h | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/libc/sysdeps/linux/mips/bits/syscalls.h b/libc/sysdeps/linux/mips/bits/syscalls.h index b8f80597e..13728ac55 100644 --- a/libc/sysdeps/linux/mips/bits/syscalls.h +++ b/libc/sysdeps/linux/mips/bits/syscalls.h @@ -270,8 +270,13 @@ _sys_result; \ }) -#define __SYSCALL_CLOBBERS "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", \ - "$14", "$15", "$24", "$25", "hi", "lo", "memory" +#if __mips_isa_rev >= 6 +# define __SYSCALL_CLOBBERS "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", \ + "$14", "$15", "$24", "$25", "memory" +#else +# define __SYSCALL_CLOBBERS "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", \ + "$14", "$15", "$24", "$25", "hi", "lo", "memory" +#endif #else /* N32 || N64 */ @@ -327,8 +332,13 @@ _sys_result; \ }) -#define __SYSCALL_CLOBBERS "$1", "$3", "$10", "$11", "$12", "$13", \ - "$14", "$15", "$24", "$25", "hi", "lo", "memory" +#if __mips_isa_rev >= 6 +# define __SYSCALL_CLOBBERS "$1", "$3", "$10", "$11", "$12", "$13", \ + "$14", "$15", "$24", "$25", "memory" +#else +# define __SYSCALL_CLOBBERS "$1", "$3", "$10", "$11", "$12", "$13", \ + "$14", "$15", "$24", "$25", "hi", "lo", "memory" +#endif #endif |