mirror of
https://github.com/radareorg/radare2.git
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179 lines
3.9 KiB
C
179 lines
3.9 KiB
C
/* radare - LGPL - Copyright 2010 pancake<nopcode.org> */
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// TODO: use r_range here??
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#include <r_bp.h>
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#include <r_list.h>
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R_API void r_bp_traptrace_free(void *ptr) {
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RBreakpointTrace *trace = ptr;
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free (trace->buffer);
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free (trace->traps);
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free (trace->bits);
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free (trace);
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}
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R_API RList *r_bp_traptrace_new() {
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RList *list = r_list_new();
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if (!list) {
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return NULL;
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}
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list->free = &r_bp_traptrace_free;
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return list;
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}
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R_API void r_bp_traptrace_enable(RBreakpoint *bp, int enable) {
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RListIter *iter;
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RBreakpointTrace *trace;
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r_list_foreach (bp->traces, iter, trace) {
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ut8 *buf = (enable)?trace->traps:trace->buffer;
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bp->iob.write_at (bp->iob.io, trace->addr, buf, trace->length);
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}
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}
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R_API void r_bp_traptrace_reset(RBreakpoint *bp, int hard) {
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RListIter *iter;
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RBreakpointTrace *trace;
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r_list_foreach (bp->traces, iter, trace) {
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if (hard) {
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r_bp_traptrace_free (trace);
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// XXX: This segfaults
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//r_list_delete (bp->traces, r_list_iter_cur (iter));
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} else {
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memset (trace->bits, 0x00, trace->bitlen);
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}
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}
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if (hard) {
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// XXX: traces not freed correctly (memleak)
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bp->traces = r_list_new ();
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bp->traces->free = r_bp_traptrace_free;
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}
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}
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// FIX: efficiency
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R_API ut64 r_bp_traptrace_next(RBreakpoint *bp, ut64 addr) {
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int i, delta;
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RListIter *iter;
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RBreakpointTrace *trace;
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r_list_foreach (bp->traces, iter, trace) {
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if (addr>=trace->addr && addr<=trace->addr_end) {
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delta = (int)(addr-trace->addr);
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for (i=delta; i<trace->length; i++) {
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if (R_BIT_CHK (trace->bits, i)) {
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return addr + i;
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}
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}
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}
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}
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return 0LL;
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}
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R_API int r_bp_traptrace_add(RBreakpoint *bp, ut64 from, ut64 to) {
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RBreakpointTrace *trace;
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ut8 *buf, *trap, *bits;
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ut64 len;
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int bitlen;
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/* cannot map addr 0 */
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if (from == 0LL) {
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return false;
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}
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if (from > to) {
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return false;
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}
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len = to-from;
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if (len >= ST32_MAX) {
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return false;
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}
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buf = (ut8*) malloc ((int)len);
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if (!buf) {
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return false;
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}
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trap = (ut8*) malloc ((int)len+4);
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if (!trap) {
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free (buf);
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return false;
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}
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bitlen = (len>>4)+1;
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bits = malloc (bitlen);
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if (!bits) {
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free (buf);
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free (trap);
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return false;
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}
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// TODO: check return value
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bp->iob.read_at (bp->iob.io, from, buf, len);
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memset (bits, 0x00, bitlen);
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r_bp_get_bytes (bp, trap, len, bp->endian, 0);
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trace = R_NEW (RBreakpointTrace);
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if (!trace) {
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free (buf);
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free (trap);
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free (bits);
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return false;
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}
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trace->addr = from;
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trace->addr_end = to;
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trace->bits = bits;
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trace->traps = trap;
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trace->buffer = buf;
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trace->length = len;
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if (!r_list_append (bp->traces, trace)){
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free (buf);
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free (trap);
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free (trace);
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return false;
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}
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// read a memory, overwrite it as breakpointing area
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// everytime it is hitted, instruction is restored
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return true;
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}
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R_API int r_bp_traptrace_free_at(RBreakpoint *bp, ut64 from) {
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int ret = false;
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RListIter *iter, *iter_tmp;
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RBreakpointTrace *trace;
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r_list_foreach_safe (bp->traces, iter, iter_tmp, trace) {
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if (from>=trace->addr && from<=trace->addr_end) {
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bp->iob.write_at (bp->iob.io, trace->addr,
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trace->buffer, trace->length);
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r_bp_traptrace_free (trace);
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r_list_delete (bp->traces, iter);
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ret = true;
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}
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}
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return ret;
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}
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R_API void r_bp_traptrace_list(RBreakpoint *bp) {
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int i;
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RListIter *iter;
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RBreakpointTrace *trace;
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r_list_foreach (bp->traces, iter, trace) {
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for (i = 0; i < trace->bitlen; i++) {
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if (R_BIT_CHK (trace->bits, i)) {
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eprintf (" - 0x%08" PFMT64x "\n", trace->addr + (i << 4));
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}
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}
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}
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}
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R_API int r_bp_traptrace_at(RBreakpoint *bp, ut64 from, int len) {
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int delta;
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RListIter *iter;
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RBreakpointTrace *trace;
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r_list_foreach (bp->traces, iter, trace) {
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// TODO: do we really need len?
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if (from>=trace->addr && from+len<=trace->addr_end) {
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delta = (int) (from-trace->addr);
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if (R_BIT_CHK (trace->bits, delta)) {
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if (trace->traps[delta] == 0x00) {
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return false; // already traced..debugger should stop
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}
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}
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R_BIT_SET (trace->bits, delta);
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return true;
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}
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}
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return false;
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}
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