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signals: demultiplexing SIGTRAP signal

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Currently a SIGTRAP can denote any one of below reasons.
	- Breakpoint hit
	- H/W debug register hit
	- Single step
	- Signal sent through kill() or rasie()

Architectures like powerpc/parisc provides infrastructure to demultiplex
SIGTRAP signal by passing down the information for receiving SIGTRAP through
si_code of siginfot_t structure. Here is an attempt is generalise this
infrastructure by extending it to x86 and x86_64 archs.

Signed-off-by: Srinivasa DS <srinivasa@in.ibm.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: akpm@linux-foundation.org
Cc: paulus@samba.org
Cc: linuxppc-dev@ozlabs.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Srinivasa Ds
2008-09-23 15:23:52 +05:30
committed by Ingo Molnar
parent 101d5b7137
commit da654b74bd
9 changed files with 21 additions and 21 deletions
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2
include/asm-generic/siginfo.h
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@@ -199,6 +199,8 @@ typedef struct siginfo {
*/
#define TRAP_BRKPT (__SI_FAULT|1) /* process breakpoint */
#define TRAP_TRACE (__SI_FAULT|2) /* process trace trap */
#define TRAP_BRANCH (__SI_FAULT|3) /* process taken branch trap */
#define TRAP_HWBKPT (__SI_FAULT|4) /* hardware breakpoint/watchpoint */
#define NSIGTRAP 2
/*