/*
* Disassemble instruction at 'loc'.
* Return address of start of next instruction.
* Since this function is used by 'examine' and by 'step'
* "next instruction" does NOT mean the next instruction to
* be executed but the 'linear' next instruction.
*/
db_addr_t
mips_disassem(db_addr_t loc, char *di_buffer, int alt_dis_format)
{
u_int32_t instr;
if (alt_dis_format) { // use ARM register names for disassembly
reg_name = &alt_arm_reg_name[0];
}
sprintf_buffer = di_buffer; // quick 'n' dirty printf() vs sprintf()
sprintf_buf_len = 39; // should be passed in
instr = *(u_int32_t *)loc;
return (db_disasm_insn(instr, loc, false));
}
/*
* Disassemble instruction at 'loc'. 'altfmt' specifies an
* (optional) alternate format (altfmt for vax: don't assume
* that each external label is a procedure entry mask).
* Return address of start of next instruction.
* Since this function is used by 'examine' and by 'step'
* "next instruction" does NOT mean the next instruction to
* be executed but the 'linear' next instruction.
*/
db_addr_t
db_disasm(db_addr_t loc, bool altfmt)
{
u_int32_t instr;
/*
* Take some care with addresses to not UTLB here as it
* loses the current debugging context. KSEG2 not checked.
*/
if (loc < MIPS_KSEG0_START) {
instr = fuword((void *)loc);
if (instr == 0xffffffff) {
/* "sd ra, -1(ra)" is unlikely */
db_printf("invalid address.\n");
return loc;
}
}
else {
instr = *(u_int32_t *)loc;
}
return (db_disasm_insn(instr, loc, altfmt));
}