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David Brownell <david-b@pacbell.net>: 

More instructions decoded:

	A5.3.5 Load/store multiple 

The preferred PUSH/POP syntax is shown when appropriate.


git-svn-id: svn://svn.berlios.de/openocd/trunk@2539 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
zwelch 2009-07-15 23:48:54 +00:00
parent 421b8e133a
commit 930269b483
1 changed files with 53 additions and 0 deletions
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53
src/target/arm_disassembler.c
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@ -2940,6 +2940,55 @@ static int t2ev_mul64_div(uint32_t opcode, uint32_t address,
return ERROR_OK;
}
static int t2ev_ldm_stm(uint32_t opcode, uint32_t address,
arm_instruction_t *instruction, char *cp)
{
int rn = (opcode >> 16) & 0xf;
int op = (opcode >> 22) & 0x6;
int t = (opcode >> 21) & 1;
unsigned registers = opcode & 0xffff;
if (opcode & (1 << 20))
op |= 1;
switch (op) {
case 2:
sprintf(cp, "STMB\tr%d%s, ", rn, t ? "!" : "");
break;
case 3:
if (rn == 13 && t)
sprintf(cp, "POP\t");
else
sprintf(cp, "LDM\tr%d%s, ", rn, t ? "!" : "");
break;
case 4:
if (rn == 13 && t)
sprintf(cp, "PUSH\t");
else
sprintf(cp, "STM\tr%d%s, ", rn, t ? "!" : "");
break;
case 5:
sprintf(cp, "LDMB\tr%d%s, ", rn, t ? "!" : "");
break;
default:
return ERROR_INVALID_ARGUMENTS;
}
cp = strchr(cp, 0);
*cp++ = '{';
for (t = 0; registers; t++, registers >>= 1) {
if ((registers & 1) == 0)
continue;
registers &= ~1;
sprintf(cp, "r%d%s", t, registers ? "," : "");
cp = strchr(cp, 0);
}
*cp++ = '}';
*cp++ = 0;
return ERROR_OK;
}
/*
* REVISIT for Thumb2 instructions, instruction->type and friends aren't
* always set. That means eventual arm_simulate_step() support for Thumb2
@ -2999,6 +3048,10 @@ int thumb2_opcode(target_t *target, uint32_t address, arm_instruction_t *instruc
else if ((opcode & 0x18008000) == 0x10008000)
retval = t2ev_b_misc(opcode, address, instruction, cp);
/* ARMv7-M: A5.3.5 Load/store multiple */
else if ((opcode & 0x1e400000) == 0x08000000)
retval = t2ev_ldm_stm(opcode, address, instruction, cp);
/* ARMv7-M: A5.3.10 Store single data item */
else if ((opcode & 0x1f100000) == 0x18000000)
retval = t2ev_store_single(opcode, address, instruction, cp);