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authorJeff Dike <jdike@addtoit.com>2007-05-06 14:51:25 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-07 12:13:02 -0700
commit377fad3acbb7e94ab9942a74e0d9ede8eeb2f039 (patch)
tree0bf8046bb1fa6ccb51df76b56819dee6b6d7487b /arch/um/include
parent5d86456d3852cb95a38d2b23fe01cede54984ba5 (diff)
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 <jdike@linux.intel.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/include')
-rw-r--r--arch/um/include/common-offsets.h2
-rw-r--r--arch/um/include/kern_util.h2
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/um/include/common-offsets.h b/arch/um/include/common-offsets.h
index 461175f8b1d9..5593a8027083 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 092a2841556f..50a49691e0e6 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