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authorLinus Torvalds <torvalds@linux-foundation.org>2018-01-17 22:54:56 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-01-17 22:54:56 +0300
commit88dc7fca18001fd883e5ace775afa316b68c8f2c (patch)
tree224bd71272b4cbc268ced27d9b3160fabb5755d8 /tools/objtool
parentdd43f3465d138439db451a5e7ddccefc5af2fa85 (diff)
parent6cfb521ac0d5b97470883ff9b7facae264b7ab12 (diff)
downloadlinux-88dc7fca18001fd883e5ace775afa316b68c8f2c.tar.xz
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 pti bits and fixes from Thomas Gleixner: "This last update contains: - An objtool fix to prevent a segfault with the gold linker by changing the invocation order. That's not just for gold, it's a general robustness improvement. - An improved error message for objtool which spares tearing hairs. - Make KASAN fail loudly if there is not enough memory instead of oopsing at some random place later - RSB fill on context switch to prevent RSB underflow and speculation through other units. - Make the retpoline/RSB functionality work reliably for both Intel and AMD - Add retpoline to the module version magic so mismatch can be detected - A small (non-fix) update for cpufeatures which prevents cpu feature clashing for the upcoming extra mitigation bits to ease backporting" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: module: Add retpoline tag to VERMAGIC x86/cpufeature: Move processor tracing out of scattered features objtool: Improve error message for bad file argument objtool: Fix seg fault with gold linker x86/retpoline: Add LFENCE to the retpoline/RSB filling RSB macros x86/retpoline: Fill RSB on context switch for affected CPUs x86/kasan: Panic if there is not enough memory to boot
Diffstat (limited to 'tools/objtool')
-rw-r--r--tools/objtool/elf.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c
index 24460155c82c..c1c338661699 100644
--- a/tools/objtool/elf.c
+++ b/tools/objtool/elf.c
@@ -26,6 +26,7 @@
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <errno.h>
#include "elf.h"
#include "warn.h"
@@ -358,7 +359,8 @@ struct elf *elf_open(const char *name, int flags)
elf->fd = open(name, flags);
if (elf->fd == -1) {
- perror("open");
+ fprintf(stderr, "objtool: Can't open '%s': %s\n",
+ name, strerror(errno));
goto err;
}