xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[PATCH] Kprobes IA64: cmp ctype unc support

Browse Source 
The current Kprobes when patching the original instruction with the break
instruction tries to retain the original qualifying predicate(qp), however
for cmp.crel.ctype where ctype == unc, which is a special instruction
always needs to be executed irrespective of qp.  Hence, if the instruction
we are patching is of this type, then we should not copy the original qp to
the break instruction, this is because we always want the break fault to
happen so that we can emulate the instruction.

This patch is based on the feedback given by David Mosberger

Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Anil S Keshavamurthy
2005-06-23 00:09:33 -07:00
committed by Linus Torvalds
parent a5403183d8
commit 1674eafcbd
2 changed files with 58 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
include/asm-ia64/kprobes.h
View File

@@ -30,6 +30,23 @@
#define BREAK_INST (long)(__IA64_BREAK_KPROBE << 6)
typedef union cmp_inst {
struct {
unsigned long long qp : 6;
unsigned long long p1 : 6;
unsigned long long c : 1;
unsigned long long r2 : 7;
unsigned long long r3 : 7;
unsigned long long p2 : 6;
unsigned long long ta : 1;
unsigned long long x2 : 2;
unsigned long long tb : 1;
unsigned long long opcode : 4;
unsigned long long reserved : 23;
}f;
unsigned long long l;
} cmp_inst_t;
struct kprobe;
typedef struct _bundle {