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Code Issues

Do not save variables in hi or lo across system calls, fixes issues with gcc-4.4 (#5351)

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SVN-Revision: 17742
This commit is contained in:
Florian Fainelli 2009-09-26 18:08:02 +00:00
parent 657788dc0d
commit 9e1759bfe6
1 changed files with 30 additions and 0 deletions
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30
toolchain/uClibc/patches-0.9.30.1/901-hi_lo_system_calls.patch Normal file
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@ -0,0 +1,30 @@
The kernel does not save these registers across system calls. GCC 4.4
has gotten more agressive about using them for temporary variables, so
this shows up as intermittent crashes if you use a recent compiler.
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
diff --git a/libc/sysdeps/linux/mips/bits/syscalls.h b/libc/sysdeps/linux/mips/bits/syscalls.h
index 3639913..28b0f91 100644
--- a/libc/sysdeps/linux/mips/bits/syscalls.h
+++ b/libc/sysdeps/linux/mips/bits/syscalls.h
@@ -261,7 +261,7 @@
})
#define __SYSCALL_CLOBBERS "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", \
- "$14", "$15", "$24", "$25", "memory"
+ "$14", "$15", "$24", "$25", "hi", "lo", "memory"
#else /* N32 || N64 */
@@ -318,7 +318,7 @@
})
#define __SYSCALL_CLOBBERS "$1", "$3", "$10", "$11", "$12", "$13", \
- "$14", "$15", "$24", "$25", "memory"
+ "$14", "$15", "$24", "$25", "hi", "lo", "memory"
#endif
--