I am trying to write a signal handler for SEGV that can figure out
what address was being accessed to cause the fault. Yes, I have a
good reason for wanting this.
The man page for sigaction() implies that the attached program below
should print "si_addr = 0x20". But when I run it on Linux/x86 2.2.14,
it says the si_addr field is always NULL. As near as I can tell by
grepping the sources, only the m68k port even tries to set si_addr
appropriately when a memory fault occurs.
Two questions:
1) Is there an easy way to do what I want on Linux/x86?
(Disassembling the instruction which caused the fault does not
qualify as "easy".)
2) Can the kernel not set si_addr in the siginfo_t correctly?
- Pat
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