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

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17742 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
florian 2009-09-26 18:08:02 +00:00
parent 607f1b1b96
commit 2d0f2c9a88
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
--