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SEGV on display /i $pc with i386 target
- From: Christopher Faylor <cgf at redhat dot com>
- To: gdb at sources dot redhat dot com
- Date: Thu, 29 Aug 2002 01:51:03 -0400
- Subject: SEGV on display /i $pc with i386 target
I just noticed a SEGV whenever I do a 'display /i $pc' on cygwin.
I tried building a gdb for linux to see what was going wrong on
cygwin but it isn't much better:
(top-gdb) display /i $pc
1: x/i $(null) 0x8072f42 <main+6>: push $0x6
The problem comes from the fact that, while gdb understands that
$pc == $eip, it doesn't seem to know how to rename $pc to $eip
when it is outputting the register name. You can get the same
behavior by doing something like 'display /i $ps', too (even
if that doesn't make sense it shouldn't SEGV).
The simplest way to fix this is to extend the i386_register_names array
to include builtin register names, however, maybe the right way to fix
this is to add something to builtin-reg.c.
I noticed that i386_register_names seems to have 41 elements while
the sum of NUM_REGS + NUM_PSEUDO_REGS == 40. Is that intentional?
cgf