From: akpm@osdl.org
To: torvalds@osdl.org
Cc: linux-kernel@vger.kernel.org, akpm@osdl.org, paulus@samba.org
Subject: [patch 029/198] ppc32: fix single-stepping of emulated instructions
Date: Tue, 12 Apr 2005 03:30:59 -0700 [thread overview]
Message-ID: <200504121031.j3CAV6mR005237@shell0.pdx.osdl.net> (raw)
From: Paul Mackerras <paulus@samba.org>
On ppc, we emulate instructions that cause alignment exceptions. If we are
single-stepping an instruction and it causes an alignment exception, we
will currently do the next instruction as well before taking the
single-step exception. This patch fixes that, so we take the single-step
exception after emulating the instruction.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
25-akpm/arch/ppc/kernel/traps.c | 1 +
1 files changed, 1 insertion(+)
diff -puN arch/ppc/kernel/traps.c~ppc32-fix-single-stepping-of-emulated-instructions arch/ppc/kernel/traps.c
--- 25/arch/ppc/kernel/traps.c~ppc32-fix-single-stepping-of-emulated-instructions 2005-04-12 03:21:10.375559576 -0700
+++ 25-akpm/arch/ppc/kernel/traps.c 2005-04-12 03:21:10.378559120 -0700
@@ -679,6 +679,7 @@ void AlignmentException(struct pt_regs *
fixed = fix_alignment(regs);
if (fixed == 1) {
regs->nip += 4; /* skip over emulated instruction */
+ emulate_single_step(regs);
return;
}
if (fixed == -EFAULT) {
_
reply other threads:[~2005-04-12 10:38 UTC|newest]
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