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b5cdb5797d
If enable is moved by GCC in a register its value may not be preserved after coming back there with longjmp(). So, mark it as volatile to prevent this; this is suggested (it seems) in info gcc, when it talks about -Wuninitialized. I re-read this and it seems to say something different, but I still believe this may be needed. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
23 lines
401 B
C
23 lines
401 B
C
#ifndef __UML_LONGJMP_H
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#define __UML_LONGJMP_H
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#include "sysdep/archsetjmp.h"
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#include "os.h"
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extern int setjmp(jmp_buf);
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extern void longjmp(jmp_buf, int);
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#define UML_LONGJMP(buf, val) do { \
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longjmp(*buf, val); \
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} while(0)
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#define UML_SETJMP(buf) ({ \
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int n; \
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volatile int enable; \
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enable = get_signals(); \
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n = setjmp(*buf); \
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if(n != 0) \
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set_signals(enable); \
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n; })
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#endif
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