diff options
Diffstat (limited to 'src/target/nds32_v2.c')
| -rw-r--r-- | src/target/nds32_v2.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/target/nds32_v2.c b/src/target/nds32_v2.c index 90961d7d..3f5f636f 100644 --- a/src/target/nds32_v2.c +++ b/src/target/nds32_v2.c @@ -534,6 +534,42 @@ static int nds32_v2_get_exception_address(struct nds32 *nds32, return ERROR_OK; } +/** + * find out which watchpoint hits + * get exception address and compare the address to watchpoints + */ +static int nds32_v2_hit_watchpoint(struct target *target, + struct watchpoint **hit_watchpoint) +{ + uint32_t exception_address; + struct watchpoint *wp; + static struct watchpoint scan_all_watchpoint; + struct nds32 *nds32 = target_to_nds32(target); + + scan_all_watchpoint.address = 0; + scan_all_watchpoint.rw = WPT_WRITE; + scan_all_watchpoint.next = 0; + scan_all_watchpoint.unique_id = 0x5CA8; + + exception_address = nds32->watched_address; + + if (exception_address == 0) { + /* send watch:0 to tell GDB to do software scan for hitting multiple watchpoints */ + *hit_watchpoint = &scan_all_watchpoint; + return ERROR_OK; + } + + for (wp = target->watchpoints; wp; wp = wp->next) { + if (((exception_address ^ wp->address) & (~wp->mask)) == 0) { + /* TODO: dispel false match */ + *hit_watchpoint = wp; + return ERROR_OK; + } + } + + return ERROR_FAIL; +} + static int nds32_v2_run_algorithm(struct target *target, int num_mem_params, struct mem_param *mem_params, @@ -747,6 +783,7 @@ struct target_type nds32_v2_target = { .remove_breakpoint = nds32_v2_remove_breakpoint, .add_watchpoint = nds32_v2_add_watchpoint, .remove_watchpoint = nds32_v2_remove_watchpoint, + .hit_watchpoint = nds32_v2_hit_watchpoint, /* MMU */ .mmu = nds32_mmu, |