diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 13:09:51 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 13:09:51 -0700 |
commit | b3fec0fe35a4ff048484f1408385a27695d4273b (patch) | |
tree | 088c23f098421ea681d9976a83aad73d15be1027 /arch/x86/mm/kmemcheck/selftest.c | |
parent | e1f5b94fd0c93c3e27ede88b7ab652d086dc960f (diff) | |
parent | 722f2a6c87f34ee0fd0130a8cf45f81e0705594a (diff) | |
download | linux-next-b3fec0fe35a4ff048484f1408385a27695d4273b.tar.gz |
Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/vegard/kmemcheck
* 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/vegard/kmemcheck: (39 commits)
signal: fix __send_signal() false positive kmemcheck warning
fs: fix do_mount_root() false positive kmemcheck warning
fs: introduce __getname_gfp()
trace: annotate bitfields in struct ring_buffer_event
net: annotate struct sock bitfield
c2port: annotate bitfield for kmemcheck
net: annotate inet_timewait_sock bitfields
ieee1394/csr1212: fix false positive kmemcheck report
ieee1394: annotate bitfield
net: annotate bitfields in struct inet_sock
net: use kmemcheck bitfields API for skbuff
kmemcheck: introduce bitfield API
kmemcheck: add opcode self-testing at boot
x86: unify pte_hidden
x86: make _PAGE_HIDDEN conditional
kmemcheck: make kconfig accessible for other architectures
kmemcheck: enable in the x86 Kconfig
kmemcheck: add hooks for the page allocator
kmemcheck: add hooks for page- and sg-dma-mappings
kmemcheck: don't track page tables
...
Diffstat (limited to 'arch/x86/mm/kmemcheck/selftest.c')
-rw-r--r-- | arch/x86/mm/kmemcheck/selftest.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/x86/mm/kmemcheck/selftest.c b/arch/x86/mm/kmemcheck/selftest.c new file mode 100644 index 000000000000..036efbea8b28 --- /dev/null +++ b/arch/x86/mm/kmemcheck/selftest.c @@ -0,0 +1,69 @@ +#include <linux/kernel.h> + +#include "opcode.h" +#include "selftest.h" + +struct selftest_opcode { + unsigned int expected_size; + const uint8_t *insn; + const char *desc; +}; + +static const struct selftest_opcode selftest_opcodes[] = { + /* REP MOVS */ + {1, "\xf3\xa4", "rep movsb <mem8>, <mem8>"}, + {4, "\xf3\xa5", "rep movsl <mem32>, <mem32>"}, + + /* MOVZX / MOVZXD */ + {1, "\x66\x0f\xb6\x51\xf8", "movzwq <mem8>, <reg16>"}, + {1, "\x0f\xb6\x51\xf8", "movzwq <mem8>, <reg32>"}, + + /* MOVSX / MOVSXD */ + {1, "\x66\x0f\xbe\x51\xf8", "movswq <mem8>, <reg16>"}, + {1, "\x0f\xbe\x51\xf8", "movswq <mem8>, <reg32>"}, + +#ifdef CONFIG_X86_64 + /* MOVZX / MOVZXD */ + {1, "\x49\x0f\xb6\x51\xf8", "movzbq <mem8>, <reg64>"}, + {2, "\x49\x0f\xb7\x51\xf8", "movzbq <mem16>, <reg64>"}, + + /* MOVSX / MOVSXD */ + {1, "\x49\x0f\xbe\x51\xf8", "movsbq <mem8>, <reg64>"}, + {2, "\x49\x0f\xbf\x51\xf8", "movsbq <mem16>, <reg64>"}, + {4, "\x49\x63\x51\xf8", "movslq <mem32>, <reg64>"}, +#endif +}; + +static bool selftest_opcode_one(const struct selftest_opcode *op) +{ + unsigned size; + + kmemcheck_opcode_decode(op->insn, &size); + + if (size == op->expected_size) + return true; + + printk(KERN_WARNING "kmemcheck: opcode %s: expected size %d, got %d\n", + op->desc, op->expected_size, size); + return false; +} + +static bool selftest_opcodes_all(void) +{ + bool pass = true; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(selftest_opcodes); ++i) + pass = pass && selftest_opcode_one(&selftest_opcodes[i]); + + return pass; +} + +bool kmemcheck_selftest(void) +{ + bool pass = true; + + pass = pass && selftest_opcodes_all(); + + return pass; +} |