On Wed, 4 Jun 2003, Ralf Baechle wrote:
> > But the need is to raise an exception after instr1 (at addr1) is executed.
> > One solution is using a break at instr2 (at addr2).
> > But suppose instr1 is a jmp then there is no point
> > in keeping a break at addr2.
> > (inorder to raise an exception after instr1 is executed).
>
> You understood correctly. Now jumps and even more so the conditional
> branches are sort of the ugly part of the whole thing. The easiest
> method is probably inserting a branch at the jump's destination address
> or in case of a branch at the branch target and the instruction following
> it's delay slot. So that's a lot of inserting and removing of
> breakpoints ...
In a more finegrained but also more complicated example, you probably
want to insert a breakpoint in the delay slot first and at the second step
evaluate the branch's condition and put a breakpoint at the next
instruction to be executed. I'm not sure if the current version of gdb
does the first step, but it inserts a single breakpoint in the second one
only. For branch likely instructions adjust the two steps as necessary.
--
+ Maciej W. Rozycki, Technical University of Gdansk, Poland +
+--------------------------------------------------------------+
+ e-mail: macro@ds2.pg.gda.pl, PGP key available +
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