42 lines
1.4 KiB
Diff
42 lines
1.4 KiB
Diff
From 40145cc1f001e7eedff7753377fb8e4b9e8787f7 Mon Sep 17 00:00:00 2001
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From: Ming Wang <wangming01@loongson.cn>
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Date: Thu, 4 Jun 2026 19:52:43 +0800
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Subject: [PATCH 22/39] LoongArch64: Fix stack frame loop bounds for exception
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frames
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Remove the incorrect -32 padding from stacktop limits in loongarch64.c.
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In modern LoongArch64 kernels, pt_regs rests exactly at the top of the
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stack, and this -32 padding forces the backtrace loop to terminate
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prematurely before reaching the exception frame.
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Signed-off-by: Ming Wang <wangming01@loongson.cn>
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---
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loongarch64.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/loongarch64.c b/loongarch64.c
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index 3ec184c908f8..9980b35bdff1 100644
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--- a/loongarch64.c
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+++ b/loongarch64.c
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@@ -461,7 +461,7 @@ loongarch64_back_trace_cmd(struct bt_info *bt)
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previous.pc = current.ra = regs->regs[LOONGARCH64_EF_RA];
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}
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- while (current.sp <= bt->stacktop - 32 - SIZE(pt_regs)) {
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+ while (current.sp <= bt->stacktop - SIZE(pt_regs)) {
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struct syment *symbol = NULL;
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ulong offset;
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@@ -501,7 +501,7 @@ loongarch64_back_trace_cmd(struct bt_info *bt)
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* * ret_from_kernel_thread
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*/
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if (symbol && !STRNEQ(symbol->name, "ret_from") && !offset &&
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- !current.ra && current.sp < bt->stacktop - 32 - SIZE(pt_regs)) {
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+ !current.ra && current.sp < bt->stacktop - SIZE(pt_regs)) {
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if (CRASHDEBUG(8))
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fprintf(fp, "zero offset at %s, try previous symbol\n",
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symbol->name);
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--
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2.54.0
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