summaryrefslogtreecommitdiff
path: root/arch/x86
diff options
context:
space:
mode:
authorOleg Nesterov <oleg@redhat.com>2013-11-04 20:27:13 +0100
committerOleg Nesterov <oleg@redhat.com>2013-11-06 20:00:05 +0100
commit8a8de66c4f6ebd0f6d3da026ec24339aa5d1db12 (patch)
tree8e8ac183b41f6b1249e819017c93fc24e332a1dd /arch/x86
parent736e89d9f782a7dd9a38ecda13b2db916fa72f33 (diff)
uprobes: Introduce arch_uprobe->ixol
Currently xol_get_insn_slot() assumes that we should simply copy arch_uprobe->insn[] which is (ignoring arch_uprobe_analyze_insn) just the copy of the original insn. This is not true for arm which needs to create another insn to execute it out-of-line. So this patch simply adds the new member, ->ixol into the union. This doesn't make any difference for x86 and powerpc, but arm can divorce insn/ixol and initialize the correct xol insn in arch_uprobe_analyze_insn(). Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/asm/uprobes.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/include/asm/uprobes.h b/arch/x86/include/asm/uprobes.h
index b20b4d68b934..3087ea9c5f2e 100644
--- a/arch/x86/include/asm/uprobes.h
+++ b/arch/x86/include/asm/uprobes.h
@@ -35,7 +35,10 @@ typedef u8 uprobe_opcode_t;
struct arch_uprobe {
u16 fixups;
- u8 insn[MAX_UINSN_BYTES];
+ union {
+ u8 insn[MAX_UINSN_BYTES];
+ u8 ixol[MAX_UINSN_BYTES];
+ };
#ifdef CONFIG_X86_64
unsigned long rip_rela_target_address;
#endif