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Merge pull request #261 from JL2210/ld-b-b

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Add ld b, b breakpoint
This commit is contained in:
Lior Halphon 2020-05-31 00:55:17 +03:00 committed by GitHub
commit 5f4aee8ca1
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 28 additions and 2 deletions
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18
Core/debugger.c
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@ -832,6 +832,23 @@ static bool registers(GB_gameboy_t *gb, char *arguments, char *modifiers, const
return true;
}
/* Enable or disable software breakpoints */
static bool softbreak(GB_gameboy_t *gb, char *arguments, char *modifiers, const debugger_command_t *command)
{
NO_MODIFIERS
if (strcmp(lstrip(arguments), "on") == 0 || !strlen(lstrip(arguments))) {
gb->has_software_breakpoints = true;
}
else if (strcmp(lstrip(arguments), "off") == 0) {
gb->has_software_breakpoints = false;
}
else {
print_usage(gb, command);
}
return true;
}
/* Find the index of the closest breakpoint equal or greater to addr */
static uint16_t find_breakpoint(GB_gameboy_t *gb, value_t addr)
{
@ -1782,6 +1799,7 @@ static const debugger_command_t commands[] = {
"a more (c)ompact one, or a one-(l)iner", "", "(f|c|l)"},
{"lcd", 3, lcd, "Displays information about the current state of the LCD controller"},
{"palettes", 3, palettes, "Displays the current CGB palettes"},
{"softbreak", 2, softbreak, "Enables or disables software breakpoints", "(on|off)"},
{"breakpoint", 1, breakpoint, "Add a new breakpoint at the specified address/expression" HELP_NEWLINE
"Can also modify the condition of existing breakpoints." HELP_NEWLINE
"If the j modifier is used, the breakpoint will occur just before" HELP_NEWLINE

2
Core/gb.h
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@ -616,7 +616,7 @@ struct GB_gameboy_internal_s {
/* Breakpoints */
uint16_t n_breakpoints;
struct GB_breakpoint_s *breakpoints;
bool has_jump_to_breakpoints;
bool has_jump_to_breakpoints, has_software_breakpoints;
void *nontrivial_jump_state;
bool non_trivial_jump_breakpoint_occured;

10
Core/sm83_cpu.c
View File

@ -1,6 +1,7 @@
#include <stdio.h>
#include <stdbool.h>
#include <assert.h>
#include "debugger.h"
#include "gb.h"
@ -789,6 +790,13 @@ LD_X_Y(l,b) LD_X_Y(l,c) LD_X_Y(l,d) LD_X_Y(l,e) LD_X_Y(l,h) LD_X_DHL
LD_DHL_Y(b) LD_DHL_Y(c) LD_DHL_Y(d) LD_DHL_Y(e) LD_DHL_Y(h) LD_DHL_Y(l) LD_DHL_Y(a)
LD_X_Y(a,b) LD_X_Y(a,c) LD_X_Y(a,d) LD_X_Y(a,e) LD_X_Y(a,h) LD_X_Y(a,l) LD_X_DHL(a)
// fire the debugger if software breakpoints are enabled
static void ld_b_b(GB_gameboy_t *gb, uint8_t opcode)
{
if (gb->has_software_breakpoints) {
GB_debugger_break(gb);
}
}
static void add_a_r(GB_gameboy_t *gb, uint8_t opcode)
{
@ -1459,7 +1467,7 @@ static GB_opcode_t *opcodes[256] = {
jr_cc_r8, add_hl_rr, ld_a_dhli, dec_rr, inc_lr, dec_lr, ld_lr_d8, cpl,
jr_cc_r8, ld_rr_d16, ld_dhld_a, inc_rr, inc_dhl, dec_dhl, ld_dhl_d8, scf, /* 3X */
jr_cc_r8, add_hl_rr, ld_a_dhld, dec_rr, inc_hr, dec_hr, ld_hr_d8, ccf,
nop, ld_b_c, ld_b_d, ld_b_e, ld_b_h, ld_b_l, ld_b_dhl, ld_b_a, /* 4X */
ld_b_b, ld_b_c, ld_b_d, ld_b_e, ld_b_h, ld_b_l, ld_b_dhl, ld_b_a, /* 4X */
ld_c_b, nop, ld_c_d, ld_c_e, ld_c_h, ld_c_l, ld_c_dhl, ld_c_a,
ld_d_b, ld_d_c, nop, ld_d_e, ld_d_h, ld_d_l, ld_d_dhl, ld_d_a, /* 5X */
ld_e_b, ld_e_c, ld_e_d, nop, ld_e_h, ld_e_l, ld_e_dhl, ld_e_a,