From 377fad3acbb7e94ab9942a74e0d9ede8eeb2f039 Mon Sep 17 00:00:00 2001 From: Jeff Dike Date: Sun, 6 May 2007 14:51:25 -0700 Subject: uml: kernel segfaults should dump proper registers If there's a segfault inside the kernel, we want a dump of the registers at the point of the segfault, not the registers at the point of calling panic or the last userspace registers. sig_handler_common_skas now uses a static register set in the case of a SIGSEGV to avoid messing up the process registers if the segfault turns out to be non-fatal. The architecture sigcontext-to-pt_regs copying code was repurposed to copy data out of the SEGV stack frame. Signed-off-by: Jeff Dike Cc: Paolo 'Blaisorblade' Giarrusso Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/include/common-offsets.h | 2 ++ arch/um/include/kern_util.h | 2 ++ 2 files changed, 4 insertions(+) (limited to 'arch/um/include') diff --git a/arch/um/include/common-offsets.h b/arch/um/include/common-offsets.h index 461175f8b1d..5593a802708 100644 --- a/arch/um/include/common-offsets.h +++ b/arch/um/include/common-offsets.h @@ -24,5 +24,7 @@ DEFINE(UM_ELF_CLASS, ELF_CLASS); DEFINE(UM_ELFCLASS32, ELFCLASS32); DEFINE(UM_ELFCLASS64, ELFCLASS64); +DEFINE(UM_NR_CPUS, NR_CPUS); + /* For crypto assembler code. */ DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx)); diff --git a/arch/um/include/kern_util.h b/arch/um/include/kern_util.h index 092a2841556..50a49691e0e 100644 --- a/arch/um/include/kern_util.h +++ b/arch/um/include/kern_util.h @@ -115,4 +115,6 @@ extern void time_init_kern(void); extern int __cant_sleep(void); extern void sigio_handler(int sig, union uml_pt_regs *regs); +extern void copy_sc(union uml_pt_regs *regs, void *from); + #endif -- cgit v1.2.3