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powerpc/xmon: Dump memory in CPU endian format 

Extend the dump command to allow display of 2, 4, and 8 byte words in
CPU endian format. Also adds dump command for "1 byte values" for the
sake of symmetry. New commands are:

  d1	dump 1 byte values
  d2	dump 2 byte values
  d4	dump 4 byte values
  d8	dump 8 byte values

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Douglas Miller <dougmill@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
This commit is contained in:
Douglas Miller 2017-02-07 07:40:44 -06:00 committed by Michael Ellerman
parent 943db62c31
commit 5e48dc0aa4
1 changed files with 55 additions and 3 deletions
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58
arch/powerpc/xmon/xmon.c
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@ -212,6 +212,10 @@ Commands:\n\
"\
C checksum\n\
d dump bytes\n\
d1 dump 1 byte values\n\
d2 dump 2 byte values\n\
d4 dump 4 byte values\n\
d8 dump 8 byte values\n\
di dump instructions\n\
df dump float values\n\
dd dump double values\n\
@ -2334,9 +2338,42 @@ static void dump_pacas(void)
}
#endif
static void dump_by_size(unsigned long addr, long count, int size)
{
unsigned char temp[16];
int i, j;
u64 val;
count = ALIGN(count, 16);
for (i = 0; i < count; i += 16, addr += 16) {
printf(REG, addr);
if (mread(addr, temp, 16) != 16) {
printf("\nFaulted reading %d bytes from 0x"REG"\n", 16, addr);
return;
}
for (j = 0; j < 16; j += size) {
putchar(' ');
switch (size) {
case 1: val = temp[j]; break;
case 2: val = *(u16 *)&temp[j]; break;
case 4: val = *(u32 *)&temp[j]; break;
case 8: val = *(u64 *)&temp[j]; break;
default: val = 0;
}
printf("%0*lx", size * 2, val);
}
printf("\n");
}
}
static void
dump(void)
{
static char last[] = { "d?\n" };
int c;
c = inchar();
@ -2350,8 +2387,9 @@ dump(void)
}
#endif
if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n')
if (c == '\n')
termch = c;
scanhex((void *)&adrs);
if (termch != '\n')
termch = 0;
@ -2383,9 +2421,23 @@ dump(void)
ndump = 64;
else if (ndump > MAX_DUMP)
ndump = MAX_DUMP;
prdump(adrs, ndump);
switch (c) {
case '8':
case '4':
case '2':
case '1':
ndump = ALIGN(ndump, 16);
dump_by_size(adrs, ndump, c - '0');
last[1] = c;
last_cmd = last;
break;
default:
prdump(adrs, ndump);
last_cmd = "d\n";
}
adrs += ndump;
last_cmd = "d\n";
}
}