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| author | Russell King <rmk+kernel@armlinux.org.uk> | 2019-12-22 19:39:40 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2020-02-21 19:58:50 +0300 |
| commit | 8d54a27593896895f6166a1ac69eac99c8a6a71a (patch) | |
| tree | e9afb17c3cb3b1d9a10f437f0f8f1c9eba9c7930 /arch/arm/kernel/unwind.c | |
| parent | bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9 (diff) | |
| download | linux-8d54a27593896895f6166a1ac69eac99c8a6a71a.tar.xz | |
ARM: allow unwinder to unwind recursive functions
Allow the unwinder to unwind recursive functions if the stack makes
progress, even if the PC is the same. This allows tracing through
recursive __switchdev_handle_port_attr_set() and similar.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/kernel/unwind.c')
| -rw-r--r-- | arch/arm/kernel/unwind.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c index 4574e6aea0a5..11a964fd66f4 100644 --- a/arch/arm/kernel/unwind.c +++ b/arch/arm/kernel/unwind.c @@ -444,7 +444,7 @@ int unwind_frame(struct stackframe *frame) ctrl.vrs[PC] = ctrl.vrs[LR]; /* check for infinite loop */ - if (frame->pc == ctrl.vrs[PC]) + if (frame->pc == ctrl.vrs[PC] && frame->sp == ctrl.vrs[SP]) return -URC_FAILURE; frame->fp = ctrl.vrs[FP]; |