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Disassembly bug fixes (find constant-gens for single operands).

This commit is contained in:
Daniel Beer 2010-03-29 20:43:03 +13:00
parent 749faf4107
commit 19bb129f81
1 changed files with 37 additions and 21 deletions
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58
dis.c
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@ -191,32 +191,44 @@ static int decode_jump(u_int8_t *code, u_int16_t offset, u_int16_t len,
return 2;
}
static void remap_cgen(msp430_amode_t *mode,
u_int16_t *addr,
msp430_reg_t *reg)
{
if (*reg == MSP430_REG_SR) {
if (*mode == MSP430_AMODE_INDIRECT) {
*mode = MSP430_AMODE_IMMEDIATE;
*addr = 4;
} else if (*mode == MSP430_AMODE_INDIRECT_INC) {
*mode = MSP430_AMODE_IMMEDIATE;
*addr = 8;
}
} else if (*reg == MSP430_REG_R3) {
if (*mode == MSP430_AMODE_REGISTER)
*addr = 0;
else if (*mode == MSP430_AMODE_INDEXED)
*addr = 1;
else if (*mode == MSP430_AMODE_INDIRECT)
*addr = 2;
else if (*mode == MSP430_AMODE_INDIRECT_INC)
*addr = 0xffff;
*mode = MSP430_AMODE_IMMEDIATE;
}
}
/* Take a decoded instruction and replace certain addressing modes of
* the constant generator registers with their corresponding immediate
* values.
*/
static void find_cgens(struct msp430_instruction *insn)
{
if (insn->src_reg == MSP430_REG_SR) {
if (insn->src_mode == MSP430_AMODE_INDIRECT) {
insn->src_mode = MSP430_AMODE_IMMEDIATE;
insn->src_addr = 4;
} else if (insn->src_mode == MSP430_AMODE_INDIRECT_INC) {
insn->src_mode = MSP430_AMODE_IMMEDIATE;
insn->src_addr = 8;
}
} else if (insn->src_reg == MSP430_REG_R3) {
if (insn->src_mode == MSP430_AMODE_REGISTER)
insn->src_addr = 0;
else if (insn->src_mode == MSP430_AMODE_INDEXED)
insn->src_addr = 1;
else if (insn->src_mode == MSP430_AMODE_INDIRECT)
insn->src_addr = 2;
else if (insn->src_mode == MSP430_AMODE_INDIRECT_INC)
insn->src_addr = 0xffff;
insn->src_mode = MSP430_AMODE_IMMEDIATE;
}
if (insn->itype == MSP430_ITYPE_DOUBLE)
remap_cgen(&insn->src_mode, &insn->src_addr,
&insn->src_reg);
else if (insn->itype == MSP430_ITYPE_SINGLE)
remap_cgen(&insn->dst_mode, &insn->dst_addr,
&insn->dst_reg);
}
/* Recognise special cases of real instructions and translate them to
@ -595,7 +607,11 @@ int dis_format(char *buf, int max_len,
if (count + 1 < max_len)
buf[count++] = ',';
while (count < 20 && count + 1 < max_len)
while (count < 19 && count + 1 < max_len)
buf[count++] = ' ';
if (count + 1 < max_len)
buf[count++] = ' ';
}