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David Brownell <david-b@pacbell.net> More instruction decoding fixes: 

A5.3.5 Load/store multiple
       A5.3.7 Load word

There was a longstanding bug in Thumb-1 LDM; the rest of the LDM/STM
fixes are just using width specs to match UAL syntax, except for two
opcode name typos.  Load word had two bitmask goofs.

git-svn-id: svn://svn.berlios.de/openocd/trunk@2565 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
oharboe 2009-07-26 19:56:58 +00:00
parent 67dbf35896
commit fc318c0298
1 changed files with 12 additions and 8 deletions
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20
src/target/arm_disassembler.c
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@ -1944,17 +1944,21 @@ int evaluate_load_store_multiple_thumb(uint16_t opcode, uint32_t address, arm_in
if ((opcode & 0xf000) == 0xc000)
{ /* generic load/store multiple */
char *wback = "!";
if (L)
{
instruction->type = ARM_LDM;
mnemonic = "LDM";
if (opcode & (1 << Rn))
wback = "";
}
else
{
instruction->type = ARM_STM;
mnemonic = "STM";
}
snprintf(ptr_name,7,"r%i!, ",Rn);
snprintf(ptr_name, sizeof ptr_name, "r%i%s, ", Rn, wback);
}
else
{ /* push/pop */
@ -2965,22 +2969,22 @@ static int t2ev_ldm_stm(uint32_t opcode, uint32_t address,
switch (op) {
case 2:
sprintf(cp, "STMB\tr%d%s, ", rn, t ? "!" : "");
sprintf(cp, "STM.W\tr%d%s, ", rn, t ? "!" : "");
break;
case 3:
if (rn == 13 && t)
sprintf(cp, "POP\t");
sprintf(cp, "POP.W\t");
else
sprintf(cp, "LDM.W\tr%d%s, ", rn, t ? "!" : "");
break;
case 4:
if (rn == 13 && t)
sprintf(cp, "PUSH\t");
sprintf(cp, "PUSH.W\t");
else
sprintf(cp, "STM.W\tr%d%s, ", rn, t ? "!" : "");
sprintf(cp, "STMDB\tr%d%s, ", rn, t ? "!" : "");
break;
case 5:
sprintf(cp, "LDMB\tr%d%s, ", rn, t ? "!" : "");
sprintf(cp, "LDMDB.W\tr%d%s, ", rn, t ? "!" : "");
break;
default:
return ERROR_INVALID_ARGUMENTS;
@ -3279,7 +3283,7 @@ static int t2ev_load_word(uint32_t opcode, uint32_t address,
if (rn == 0xf) {
immed = opcode & 0x0fff;
if (opcode & (1 << 23))
if ((opcode & (1 << 23)) == 0)
immed = -immed;
sprintf(cp, "LDR\tr%d, %#8.8" PRIx32,
(int) (opcode >> 12) & 0xf,
@ -3317,7 +3321,7 @@ static int t2ev_load_word(uint32_t opcode, uint32_t address,
if (((opcode >> 8) & 0xf) == 0xc || (opcode & 0x0900) == 0x0900) {
char *p1 = "]", *p2 = "";
if (!(opcode & 0x0600))
if (!(opcode & 0x0500))
return ERROR_INVALID_ARGUMENTS;
immed = opcode & 0x00ff;