Currently when xmon is dumping instructions it reads a word at a time
and then prints that instruction (either as a hex number or by
disassembling it). For prefixed instructions it would be nice to show
its prefix and suffix as together. Use read_instr() so that if a prefix
is encountered its suffix is loaded too. Then print these in the form:
prefix:suffix
Xmon uses the disassembly routines from GNU binutils. These currently do
not support prefixed instructions so we will not disassemble the
prefixed instructions yet.
Signed-off-by: Jordan Niethe <jniet...@gmail.com>
---
arch/powerpc/xmon/xmon.c | 50 +++++++++++++++++++++++++++++++---------
1 file changed, 39 insertions(+), 11 deletions(-)
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 93259a06eadc..dc8b1c7b3e1b 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -2900,6 +2900,21 @@ prdump(unsigned long adrs, long ndump)
}
}
+static bool instrs_are_equal(unsigned long insta, unsigned long sufxa,
+ unsigned long instb, unsigned long sufxb)
+{
+ if (insta != instb)
+ return false;
+
+ if (!IS_PREFIX(insta) && !IS_PREFIX(instb))
+ return true;
+
+ if (IS_PREFIX(insta) && IS_PREFIX(instb))
+ return sufxa == sufxb;
+
+ return false;
+}
+
typedef int (*instruction_dump_func)(unsigned long inst, unsigned long addr);
static int
@@ -2908,12 +2923,11 @@ generic_inst_dump(unsigned long adr, long count, int
praddr,
{
int nr, dotted;
unsigned long first_adr;
- unsigned int inst, last_inst = 0;
- unsigned char val[4];
+ unsigned int inst, sufx, last_inst = 0, last_sufx = 0;
dotted = 0;
- for (first_adr = adr; count > 0; --count, adr += 4) {
- nr = mread(adr, val, 4);
+ for (first_adr = adr; count > 0; --count, adr += nr) {
+ nr = read_instr(adr, &inst, &sufx);
if (nr == 0) {
if (praddr) {
const char *x = fault_chars[fault_type];
@@ -2921,8 +2935,9 @@ generic_inst_dump(unsigned long adr, long count, int
praddr,
}
break;
}
- inst = GETWORD(val);
- if (adr > first_adr && inst == last_inst) {
+ if (adr > first_adr && instrs_are_equal(inst, sufx,
+ last_inst,
+ last_sufx)) {
if (!dotted) {
printf(" ...\n");
dotted = 1;
@@ -2931,11 +2946,24 @@ generic_inst_dump(unsigned long adr, long count, int
praddr,
}
dotted = 0;
last_inst = inst;
- if (praddr)
- printf(REG" %.8x", adr, inst);
- printf("\t");
- dump_func(inst, adr);
- printf("\n");
+ last_sufx = sufx;
+ if (IS_PREFIX(inst)) {
+ if (praddr)
+ printf(REG" %.8x:%.8x", adr, inst, sufx);
+ printf("\t");
+ /*
+ * Just use this until binutils ppc disassembly
+ * prints prefixed instructions.
+ */
+ printf("%.8x:%.8x", inst, sufx);
+ printf("\n");
+ } else {
+ if (praddr)
+ printf(REG" %.8x", adr, inst);
+ printf("\t");
+ dump_func(inst, adr);
+ printf("\n");
+ }
}
return adr - first_adr;
}
--
2.20.1
