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Date: Tue, 10 Aug 2021 16:13:17 +0000 (UTC) From: Christophe Leroy <christophe.leroy@...roup.eu> To: Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...ba.org>, Michael Ellerman <mpe@...erman.id.au>, npiggin@...il.com, userm57@...oo.com, fthain@...ux-m68k.org Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org Subject: [PATCH] powerpc/interrupt: Do not call single_step_exception() from other exceptions single_step_exception() is called by emulate_single_step() which is called from (at least) alignment exception() handler and program_check_exception() handler. Redefine it as a regular __single_step_exception() which is called by both single_step_exception() handler and emulate_single_step() function. Fixes: 3a96570ffceb ("powerpc: convert interrupt handlers to use wrappers") Cc: stable@...r.kernel.org Cc: Stan Johnson <userm57@...oo.com> Cc: Nicholas Piggin <npiggin@...il.com> Cc: Finn Thain <fthain@...ux-m68k.org> Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu> --- arch/powerpc/kernel/traps.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index dfbce527c98e..d56254f05e17 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -1104,7 +1104,7 @@ DEFINE_INTERRUPT_HANDLER(RunModeException) _exception(SIGTRAP, regs, TRAP_UNK, 0); } -DEFINE_INTERRUPT_HANDLER(single_step_exception) +static void __single_step_exception(struct pt_regs *regs) { clear_single_step(regs); clear_br_trace(regs); @@ -1121,6 +1121,11 @@ DEFINE_INTERRUPT_HANDLER(single_step_exception) _exception(SIGTRAP, regs, TRAP_TRACE, regs->nip); } +DEFINE_INTERRUPT_HANDLER(single_step_exception) +{ + __single_step_exception(regs); +} + /* * After we have successfully emulated an instruction, we have to * check if the instruction was being single-stepped, and if so, @@ -1130,7 +1135,7 @@ DEFINE_INTERRUPT_HANDLER(single_step_exception) static void emulate_single_step(struct pt_regs *regs) { if (single_stepping(regs)) - single_step_exception(regs); + __single_step_exception(regs); } static inline int __parse_fpscr(unsigned long fpscr) -- 2.25.0
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