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Improve variable names in r_debug_execute

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Lazula 2022-04-10 19:37:13 -05:00 committed by pancake
parent 2a3b6cc550
commit cc8e2b3f55
1 changed files with 15 additions and 17 deletions
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32
libr/debug/debug.c
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@ -507,15 +507,13 @@ R_API bool r_debug_set_arch(RDebug *dbg, const char *arch, int bits) {
return false;
}
/*
* Save 4096 bytes from %esp
/* Save 4096 bytes from the stack pointer
* TODO: Add support for reverse stack architectures
* Also known as r_debug_inject()
*/
R_API ut64 r_debug_execute(RDebug *dbg, const ut8 *buf, int len, int restore) {
int orig_sz;
ut8 stackbackup[4096];
ut8 *backup, *orig = NULL;
ut8 stack_backup[4096];
ut8 *pc_backup, *reg_backup = NULL;
RRegItem *ri, *risp, *ripc;
ut64 rsp, rpc, ra0 = 0LL;
if (r_debug_is_dead (dbg)) {
@ -525,21 +523,21 @@ R_API ut64 r_debug_execute(RDebug *dbg, const ut8 *buf, int len, int restore) {
risp = r_reg_get (dbg->reg, dbg->reg->name[R_REG_NAME_SP], R_REG_TYPE_GPR);
if (ripc) {
r_debug_reg_sync (dbg, R_REG_TYPE_GPR, false);
orig = r_reg_get_bytes (dbg->reg, R_REG_TYPE_ALL, &orig_sz);
if (!orig) {
reg_backup = r_reg_get_bytes (dbg->reg, R_REG_TYPE_ALL, &orig_sz);
if (!reg_backup) {
eprintf ("Cannot get register arena bytes\n");
return 0LL;
}
rpc = r_reg_get_value (dbg->reg, ripc);
rsp = r_reg_get_value (dbg->reg, risp);
backup = malloc (len);
if (!backup) {
free (orig);
pc_backup = malloc (len);
if (!pc_backup) {
free (reg_backup);
return 0LL;
}
dbg->iob.read_at (dbg->iob.io, rpc, backup, len);
dbg->iob.read_at (dbg->iob.io, rsp, stackbackup, len);
dbg->iob.read_at (dbg->iob.io, rpc, pc_backup, len);
dbg->iob.read_at (dbg->iob.io, rsp, stack_backup, len);
r_bp_add_sw (dbg->bp, rpc+len, dbg->bpsize, R_BP_PROT_EXEC);
@ -551,22 +549,22 @@ R_API ut64 r_debug_execute(RDebug *dbg, const ut8 *buf, int len, int restore) {
/* TODO: check if stopped in breakpoint or not */
r_bp_del (dbg->bp, rpc+len);
dbg->iob.write_at (dbg->iob.io, rpc, backup, len);
dbg->iob.write_at (dbg->iob.io, rpc, pc_backup, len);
if (restore) {
dbg->iob.write_at (dbg->iob.io, rsp, stackbackup, len);
dbg->iob.write_at (dbg->iob.io, rsp, stack_backup, len);
}
r_debug_reg_sync (dbg, R_REG_TYPE_GPR, false);
ri = r_reg_get (dbg->reg, dbg->reg->name[R_REG_NAME_A0], R_REG_TYPE_GPR);
ra0 = r_reg_get_value (dbg->reg, ri);
if (restore) {
r_reg_read_regs (dbg->reg, orig, orig_sz);
r_reg_read_regs (dbg->reg, reg_backup, orig_sz);
} else {
r_reg_set_value (dbg->reg, ripc, rpc);
}
r_debug_reg_sync (dbg, R_REG_TYPE_GPR, true);
free (backup);
free (orig);
free (pc_backup);
free (reg_backup);
eprintf ("ra0=0x%08"PFMT64x"\n", ra0);
} else {
eprintf ("r_debug_execute: Cannot get program counter\n");