[PATCH v4 14/23] powerpc/syscall: Save r3 in regs->orig_r3
From: Christophe Leroy <hidden>
Date: 2021-01-26 06:48:18
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
Save r3 in regs->orig_r3 in system_call_exception() Signed-off-by: Christophe Leroy <redacted> --- arch/powerpc/kernel/entry_64.S | 1 - arch/powerpc/kernel/syscall.c | 2 ++ 2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index aa1af139d947..a562a4240aa6 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S@@ -278,7 +278,6 @@ END_BTB_FLUSH_SECTION std r10,_LINK(r1) std r11,_TRAP(r1) std r12,_CCR(r1) - std r3,ORIG_GPR3(r1) addi r10,r1,STACK_FRAME_OVERHEAD ld r11,exception_marker@toc(r2) std r11,-16(r10) /* "regshere" marker */
diff --git a/arch/powerpc/kernel/syscall.c b/arch/powerpc/kernel/syscall.c
index cb415170b8f2..b66cfcbcb755 100644
--- a/arch/powerpc/kernel/syscall.c
+++ b/arch/powerpc/kernel/syscall.c@@ -29,6 +29,8 @@ notrace long system_call_exception(long r3, long r4, long r5, { syscall_fn f; + regs->orig_gpr3 = r3; + if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG)) BUG_ON(irq_soft_mask_return() != IRQS_ALL_DISABLED);
--
2.25.0