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debug.c
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#include "debug.h"
#include "bbc.h"
#include "bbc_options.h"
#include "cpu_driver.h"
#include "defs_6502.h"
#include "disc_drive.h"
#include "disc_tool.h"
#include "expression.h"
#include "keyboard.h"
#include "log.h"
#include "render.h"
#include "state.h"
#include "state_6502.h"
#include "timing.h"
#include "util.h"
#include "util_string.h"
#include "via.h"
#include "video.h"
#include "os_fault.h"
#include "os_terminal.h"
#include <assert.h>
#include <inttypes.h>
#include <ctype.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static const size_t k_max_opcode_len = (13 + 1);
static const size_t k_max_extra_len = 32;
enum {
k_max_break = 16,
};
enum {
k_max_input_len = 1024,
};
struct debug_breakpoint {
int is_in_use;
int is_enabled;
uint64_t num_hits;
int has_exec_range;
int has_memory_range;
int is_memory_read;
int is_memory_write;
int32_t exec_start;
int32_t exec_end;
int32_t memory_start;
int32_t memory_end;
int do_print;
int do_stop;
char* p_command_list_str;
struct util_string_list_struct* p_command_list;
struct expression_struct* p_expression;
};
struct debug_struct {
struct bbc_struct* p_bbc;
struct state_6502* p_state_6502;
uint8_t* p_mem_read;
struct timing_struct* p_timing;
struct video_struct* p_video;
struct render_struct* p_render;
struct via_struct* p_system_via;
struct via_struct* p_user_via;
struct disc_tool_struct* p_tool;
int debug_active;
int debug_running;
int debug_running_print;
uint8_t* p_opcode_types;
uint8_t* p_opcode_modes;
uint8_t* p_opcode_mem;
uint8_t* p_opcode_cycles;
struct util_string_list_struct* p_command_strings;
struct util_string_list_struct* p_pending_commands;
/* Modifiable register / machine state. */
uint8_t reg_a;
uint8_t reg_x;
uint8_t reg_y;
uint8_t reg_s;
uint16_t reg_pc;
/* Other machine state, some calculated. */
uint8_t reg_flags;
int32_t addr_6502;
int is_read;
int is_write;
/* Breakpointing. */
int32_t next_or_finish_stop_addr;
struct debug_breakpoint breakpoints[k_max_break];
uint32_t max_breakpoint_used_plus_one;
int64_t temp_storage[16];
int is_sub_instruction_active;
uint32_t timer_id_sub_instruction;
uint32_t sub_instruction_tick;
int32_t breakpoint_continue;
uint32_t breakpoint_continue_count;
/* Stats. */
int stats;
uint64_t count_addr[k_6502_addr_space_size];
uint64_t count_opcode[k_6502_op_num_opcodes];
uint64_t count_optype[k_6502_op_num_types];
uint64_t count_opmode[k_6502_op_num_modes];
uint64_t rom_write_faults;
uint64_t branch_not_taken;
uint64_t branch_taken;
uint64_t branch_taken_page_crossing;
uint64_t abn_reads;
uint64_t abn_reads_with_page_crossing;
uint64_t idy_reads;
uint64_t idy_reads_with_page_crossing;
uint64_t adc_sbc_count;
uint64_t adc_sbc_with_decimal_count;
uint64_t register_reads;
uint64_t register_writes;
/* Other. */
uint8_t warn_at_addr_count[k_6502_addr_space_size];
int32_t timer_id_debug;
char previous_commands[k_max_input_len];
};
static int s_interrupt_received;
static struct debug_struct* s_p_debug;
static void
debug_interrupt_callback(void) {
s_interrupt_received = 1;
}
static void
debug_clear_breakpoint(struct debug_struct* p_debug, uint32_t i) {
struct debug_breakpoint* p_breakpoint = &p_debug->breakpoints[i];
if (p_breakpoint->p_command_list) {
util_free(p_breakpoint->p_command_list_str);
util_string_list_free(p_breakpoint->p_command_list);
}
if (p_breakpoint->p_expression) {
expression_destroy(p_breakpoint->p_expression);
}
(void) memset(p_breakpoint, '\0', sizeof(struct debug_breakpoint));
p_breakpoint->exec_start = -1;
p_breakpoint->exec_end = -1;
p_breakpoint->memory_start = -1;
p_breakpoint->memory_end = -1;
}
static void
debug_timer_callback(void* p) {
struct debug_struct* p_debug = (struct debug_struct*) p;
(void) timing_stop_timer(p_debug->p_timing, p_debug->timer_id_debug);
s_interrupt_received = 1;
}
void
debug_init(struct debug_struct* p_debug) {
struct cpu_driver* p_cpu_driver = bbc_get_cpu_driver(p_debug->p_bbc);
p_cpu_driver->p_funcs->get_opcode_maps(p_cpu_driver,
&p_debug->p_opcode_types,
&p_debug->p_opcode_modes,
&p_debug->p_opcode_mem,
&p_debug->p_opcode_cycles);
}
void
debug_destroy(struct debug_struct* p_debug) {
disc_tool_destroy(p_debug->p_tool);
util_string_list_free(p_debug->p_command_strings);
util_string_list_free(p_debug->p_pending_commands);
free(p_debug);
}
volatile int*
debug_get_interrupt(struct debug_struct* p_debug) {
(void) p_debug;
return &s_interrupt_received;
}
int
debug_subsystem_active(void* p) {
struct debug_struct* p_debug = (struct debug_struct*) p;
return p_debug->debug_active;
}
static void
debug_print_opcode(struct debug_struct* p_debug,
char* buf,
size_t buf_len,
uint8_t opcode,
uint8_t operand1,
uint8_t operand2,
uint16_t reg_pc,
int do_irq) {
uint8_t optype;
uint8_t opmode;
const char* opname;
uint16_t addr;
if (do_irq) {
struct state_6502* p_state_6502 = bbc_get_6502(p_debug->p_bbc);
/* Very close approximation. It's possible a non-NMI IRQ will be reported
* but then an NMI occurs if the NMI is raised within the first few cycles
* of the IRQ BRK.
*/
if (state_6502_check_irq_firing(p_state_6502, k_state_6502_irq_nmi)) {
(void) snprintf(buf, buf_len, "IRQ (NMI)");
} else {
(void) snprintf(buf, buf_len, "IRQ (IRQ)");
}
return;
}
optype = p_debug->p_opcode_types[opcode];
opmode = p_debug->p_opcode_modes[opcode];
opname = g_p_opnames[optype];
addr = (operand1 | (operand2 << 8));
switch (opmode) {
case k_nil:
case k_nil1:
(void) snprintf(buf, buf_len, "%s", opname);
break;
case k_acc:
(void) snprintf(buf, buf_len, "%s A", opname);
break;
case k_imm:
(void) snprintf(buf, buf_len, "%s #$%.2"PRIX8, opname, operand1);
break;
case k_zpg:
(void) snprintf(buf, buf_len, "%s $%.2"PRIX8, opname, operand1);
break;
case k_abs:
(void) snprintf(buf, buf_len, "%s $%.4"PRIX16, opname, addr);
break;
case k_zpx:
(void) snprintf(buf, buf_len, "%s $%.2"PRIX8",X", opname, operand1);
break;
case k_zpy:
(void) snprintf(buf, buf_len, "%s $%.2"PRIX8",Y", opname, operand1);
break;
case k_abx:
(void) snprintf(buf, buf_len, "%s $%.4"PRIX16",X", opname, addr);
break;
case k_aby:
(void) snprintf(buf, buf_len, "%s $%.4"PRIX16",Y", opname, addr);
break;
case k_idx:
(void) snprintf(buf, buf_len, "%s ($%.2"PRIX8",X)", opname, operand1);
break;
case k_idy:
(void) snprintf(buf, buf_len, "%s ($%.2"PRIX8"),Y", opname, operand1);
break;
case k_ind:
(void) snprintf(buf, buf_len, "%s ($%.4"PRIX16")", opname, addr);
break;
case k_rel:
addr = (reg_pc + 2 + (int8_t) operand1);
(void) snprintf(buf, buf_len, "%s $%.4"PRIX16, opname, addr);
break;
case k_iax:
(void) snprintf(buf, buf_len, "%s ($%.4"PRIX16",X)", opname, addr);
break;
case k_id:
(void) snprintf(buf, buf_len, "%s ($%.2"PRIX8")", opname, operand1);
break;
case 0:
(void) snprintf(buf, buf_len, "%s: $%.2"PRIX8, opname, opcode);
break;
default:
assert(0);
break;
}
}
static inline int
debug_flag_z(uint8_t reg_flags) {
return !!(reg_flags & 0x02);
}
static inline int
debug_flag_n(uint8_t reg_flags) {
return !!(reg_flags & 0x80);
}
static inline int
debug_flag_c(uint8_t reg_flags) {
return !!(reg_flags & 0x01);
}
static inline int
debug_flag_o(uint8_t reg_flags) {
return !!(reg_flags & 0x40);
}
static inline int
debug_flag_d(uint8_t reg_flags) {
return !!(reg_flags & 0x08);
}
static inline int
debug_flag_i(uint8_t reg_flags) {
return !!(reg_flags & 0x04);
}
static inline void
debug_get_details(int* p_addr_6502,
int* p_branch_taken,
int* p_is_read,
int* p_is_write,
int* p_is_rom,
int* p_is_register,
int* p_wrapped_8bit,
int* p_wrapped_16bit,
struct debug_struct* p_debug,
uint8_t opmode,
uint8_t optype,
uint8_t opmem,
uint8_t operand1,
uint8_t operand2,
uint8_t* p_mem) {
uint16_t addr_addr;
int32_t addr = -1;
int check_wrap_8bit = 1;
*p_addr_6502 = -1;
*p_branch_taken = -1;
*p_wrapped_8bit = 0;
*p_wrapped_16bit = 0;
switch (opmode) {
case k_zpg:
addr = operand1;
*p_addr_6502 = addr;
break;
case k_zpx:
addr = (operand1 + p_debug->reg_x);
*p_addr_6502 = (uint8_t) addr;
break;
case k_zpy:
addr = (operand1 + p_debug->reg_y);
*p_addr_6502 = (uint8_t) addr;
break;
case k_abs:
check_wrap_8bit = 0;
if (optype != k_jsr && optype != k_jmp) {
addr = (operand1 + (operand2 << 8));
*p_addr_6502 = addr;
}
break;
case k_abx:
addr = (operand1 + (operand2 << 8) + p_debug->reg_x);
check_wrap_8bit = 0;
*p_addr_6502 = (uint16_t) addr;
break;
case k_aby:
addr = (operand1 + (operand2 << 8) + p_debug->reg_y);
check_wrap_8bit = 0;
*p_addr_6502 = (uint16_t) addr;
break;
case k_idx:
addr_addr = (operand1 + p_debug->reg_x);
addr = (uint8_t) addr_addr;
if ((addr != addr_addr) || (addr == 0xFF)) {
*p_wrapped_8bit = 1;
}
*p_addr_6502 = p_mem[(uint8_t) (addr + 1)];
*p_addr_6502 <<= 8;
*p_addr_6502 |= p_mem[addr];
addr = *p_addr_6502;
check_wrap_8bit = 0;
break;
case k_idy:
if (operand1 == 0xFF) {
*p_wrapped_8bit = 1;
}
addr = p_mem[(uint8_t) (operand1 + 1)];
addr <<= 8;
addr |= p_mem[operand1];
addr = (addr + p_debug->reg_y);
check_wrap_8bit = 0;
*p_addr_6502 = (uint16_t) addr;
break;
case k_id:
if (operand1 == 0xFF) {
*p_wrapped_8bit = 1;
}
addr = p_mem[(uint8_t) (operand1 + 1)];
addr <<= 8;
addr |= p_mem[operand1];
*p_addr_6502 = (uint16_t) addr;
break;
case k_rel:
addr_addr = (p_debug->reg_pc + 2);
addr = (uint16_t) (addr_addr + (int8_t) operand1);
switch (optype) {
case k_bpl:
*p_branch_taken = !debug_flag_n(p_debug->reg_flags);
break;
case k_bmi:
*p_branch_taken = debug_flag_n(p_debug->reg_flags);
break;
case k_bvc:
*p_branch_taken = !debug_flag_o(p_debug->reg_flags);
break;
case k_bvs:
*p_branch_taken = debug_flag_o(p_debug->reg_flags);
break;
case k_bcc:
*p_branch_taken = !debug_flag_c(p_debug->reg_flags);
break;
case k_bcs:
*p_branch_taken = debug_flag_c(p_debug->reg_flags);
break;
case k_bne:
*p_branch_taken = !debug_flag_z(p_debug->reg_flags);
break;
case k_beq:
*p_branch_taken = debug_flag_z(p_debug->reg_flags);
break;
case k_bra:
*p_branch_taken = 1;
break;
default:
assert(0);
break;
}
if (*p_branch_taken) {
if ((addr_addr & 0x100) ^ (addr & 0x100)) {
*p_wrapped_8bit = 1;
}
}
break;
default:
break;
}
if ((opmode != k_rel) && (addr != *p_addr_6502)) {
if (check_wrap_8bit) {
*p_wrapped_8bit = 1;
} else {
*p_wrapped_16bit = 1;
}
}
*p_is_read = !!(opmem & k_opmem_read_flag);
*p_is_write = !!(opmem & k_opmem_write_flag);
bbc_get_address_details(p_debug->p_bbc,
p_is_register,
p_is_rom,
*p_addr_6502);
}
static uint16_t
debug_disass(struct debug_struct* p_debug,
struct cpu_driver* p_cpu_driver,
uint16_t addr_6502) {
size_t i;
uint8_t* p_mem_read = p_debug->p_mem_read;
for (i = 0; i < 20; ++i) {
char opcode_buf[k_max_opcode_len];
uint16_t addr_plus_1 = (addr_6502 + 1);
uint16_t addr_plus_2 = (addr_6502 + 2);
uint8_t opcode = p_mem_read[addr_6502];
uint8_t opmode = p_debug->p_opcode_modes[opcode];
uint8_t oplen = g_opmodelens[opmode];
uint8_t operand1 = p_mem_read[addr_plus_1];
uint8_t operand2 = p_mem_read[addr_plus_2];
const char* p_address_info = "";
if (p_cpu_driver != NULL) {
p_address_info = p_cpu_driver->p_funcs->get_address_info(
p_cpu_driver, addr_6502);
}
debug_print_opcode(p_debug,
opcode_buf,
sizeof(opcode_buf),
opcode,
operand1,
operand2,
addr_6502,
0);
(void) printf("[%s] %.4"PRIX16": %s\n",
p_address_info,
addr_6502,
opcode_buf);
addr_6502 += oplen;
}
return addr_6502;
}
static void
debug_dump_via(struct bbc_struct* p_bbc, int id) {
struct via_struct* p_via;
uint8_t ORA;
uint8_t ORB;
uint8_t DDRA;
uint8_t DDRB;
uint8_t SR;
uint8_t ACR;
uint8_t PCR;
uint8_t IFR;
uint8_t IER;
uint8_t peripheral_a;
uint8_t peripheral_b;
int32_t T1C_raw;
int32_t T1L;
int32_t T2C_raw;
int32_t T2L;
uint8_t t1_oneshot_fired;
uint8_t t2_oneshot_fired;
uint8_t t1_pb7;
int CA1;
int CA2;
int CB1;
int CB2;
if (id == k_via_system) {
(void) printf("System VIA\n");
p_via = bbc_get_sysvia(p_bbc);
} else if (id == k_via_user) {
(void) printf("User VIA\n");
p_via = bbc_get_uservia(p_bbc);
} else {
assert(0);
p_via = NULL;
}
via_get_registers(p_via,
&ORA,
&ORB,
&DDRA,
&DDRB,
&SR,
&ACR,
&PCR,
&IFR,
&IER,
&peripheral_a,
&peripheral_b,
&T1C_raw,
&T1L,
&T2C_raw,
&T2L,
&t1_oneshot_fired,
&t2_oneshot_fired,
&t1_pb7);
via_get_all_CAB(p_via, &CA1, &CA2, &CB1, &CB2);
(void) printf("IFR %.2"PRIX8" IER %.2"PRIX8"\n", IFR, IER);
(void) printf("ORA %.2"PRIX8" DDRA %.2"PRIX8" periph %.2"PRIX8"\n",
ORA,
DDRA,
peripheral_a);
(void) printf("ORB %.2"PRIX8" DDRB %.2"PRIX8" periph %.2"PRIX8"\n",
ORB,
DDRB,
peripheral_b);
(void) printf("SR %.2"PRIX8" ACR %.2"PRIX8" PCR %.2"PRIX8"\n", SR, ACR, PCR);
(void) printf("T1L %.4"PRIX16" T1C %.4"PRIX16" oneshot hit %d PB7 %d\n",
(uint16_t) T1L,
(uint16_t) (T1C_raw >> 1),
(int) t1_oneshot_fired,
(int) t1_pb7);
(void) printf("T2L %.4"PRIX16" T2C %.4"PRIX16" oneshot hit %d\n",
(uint16_t) T2L,
(uint16_t) (T2C_raw >> 1),
(int) t2_oneshot_fired);
(void) printf("CA1 %d CA2 %d CB1 %d CB2 %d\n", CA1, CA2, CB1, CB2);
/* IC32 isn't really a VIA thing but put it here for convenience. */
if (id == k_via_system) {
uint8_t IC32 = bbc_get_IC32(p_bbc);
(void) printf("IC32 %.2"PRIX8"\n", IC32);
}
}
static void
debug_dump_crtc(struct bbc_struct* p_bbc) {
uint32_t i;
uint8_t horiz_counter;
uint8_t scanline_counter;
uint8_t vert_counter;
uint16_t address_counter;
uint64_t crtc_frames;
int is_in_vert_adjust;
int is_in_dummy_raster;
uint8_t regs[k_video_crtc_num_registers];
uint32_t horiz_pos;
uint32_t vert_pos;
struct video_struct* p_video = bbc_get_video(p_bbc);
struct render_struct* p_render = bbc_get_render(p_bbc);
horiz_pos = render_get_horiz_pos(p_render);
vert_pos = render_get_vert_pos(p_render);
(void) printf("beam pos: horiz %d vert %d\n", horiz_pos, vert_pos);
video_get_crtc_state(p_video,
&horiz_counter,
&scanline_counter,
&vert_counter,
&address_counter,
&crtc_frames,
&is_in_vert_adjust,
&is_in_dummy_raster);
video_get_crtc_registers(p_video, ®s[0]);
(void) printf("horiz %"PRId8" scanline %"PRId8" vert %"PRId8
" addr $%.4"PRIX16" frames %"PRIu64"\n",
horiz_counter,
scanline_counter,
vert_counter,
address_counter,
crtc_frames);
(void) printf("is_in_vert_adjust %d is_in_dummy_raster %d\n",
is_in_vert_adjust,
is_in_dummy_raster);
for (i = 0; i < k_video_crtc_num_registers; ++i) {
(void) printf("R%.2d $%.2X ", i, regs[i]);
if ((i & 7) == 7) {
(void) printf("\n");
}
}
(void) printf("\n");
}
static void
debug_dump_bbc(struct bbc_struct* p_bbc) {
uint32_t i;
uint8_t ula_palette[16];
struct video_struct* p_video = bbc_get_video(p_bbc);
uint8_t ula_ctrl = video_get_ula_control(p_video);
video_get_ula_full_palette(p_video, &ula_palette[0]);
(void) printf("ROMSEL $%.2X ACCCON $%.2X IC32 $%.2X\n",
bbc_get_romsel(p_bbc),
bbc_get_acccon(p_bbc),
bbc_get_IC32(p_bbc));
(void) printf("ULA control $%.2X\n", ula_ctrl);
(void) printf("ULA palette ");
for (i = 0; i < 16; ++i) {
(void) printf("$%.2X ", ula_palette[i]);
}
printf("\n");
}
static struct debug_breakpoint*
debug_get_free_breakpoint(struct debug_struct* p_debug) {
uint32_t i;
for (i = 0; i < k_max_break; ++i) {
struct debug_breakpoint* p_breakpoint = &p_debug->breakpoints[i];
if (!p_breakpoint->is_in_use) {
p_breakpoint->is_in_use = 1;
if ((i + 1) > p_debug->max_breakpoint_used_plus_one) {
p_debug->max_breakpoint_used_plus_one = (i + 1);
}
return p_breakpoint;
}
}
return NULL;
}
static inline void
debug_calculate_max_breakpoint(struct debug_struct* p_debug) {
uint32_t i;
p_debug->max_breakpoint_used_plus_one = 0;
for (i = 0; i < k_max_break; ++i) {
struct debug_breakpoint* p_breakpoint = &p_debug->breakpoints[i];
if (p_breakpoint->is_in_use) {
p_debug->max_breakpoint_used_plus_one = (i + 1);
}
}
}
static inline void
debug_check_breakpoints(struct debug_struct* p_debug,
int* p_out_print,
int* p_out_stop,
uint8_t opmem) {
uint32_t i;
uint32_t max_breakpoint_used_plus_one = p_debug->max_breakpoint_used_plus_one;
if (p_debug->reg_pc == p_debug->next_or_finish_stop_addr) {
*p_out_print = 1;
*p_out_stop = 1;
}
for (i = 0; i < max_breakpoint_used_plus_one; ++i) {
struct debug_breakpoint* p_breakpoint = &p_debug->breakpoints[i];
if (!p_breakpoint->is_in_use) {
continue;
}
if (!p_breakpoint->is_enabled) {
continue;
}
if (p_breakpoint->has_exec_range) {
if ((p_debug->reg_pc < p_breakpoint->exec_start) ||
(p_debug->reg_pc > p_breakpoint->exec_end)) {
continue;
}
}
if (p_breakpoint->has_memory_range) {
if ((p_debug->addr_6502 < p_breakpoint->memory_start) ||
(p_debug->addr_6502 > p_breakpoint->memory_end)) {
continue;
}
if (p_breakpoint->is_memory_read && (opmem & k_opmem_read_flag)) {
/* Match. */
} else if (p_breakpoint->is_memory_write &&
(opmem & k_opmem_write_flag)) {
/* Match. */
} else {
continue;
}
}
if (p_breakpoint->p_expression != NULL) {
int64_t expression_ret = expression_execute(p_breakpoint->p_expression);
if (expression_ret == 0) {
continue;
}
}
/* If we arrive here, it's a hit. */
p_breakpoint->num_hits++;
if (p_breakpoint->do_stop && p_breakpoint->do_print) {
(void) printf("breakpoint %"PRIu32" hit %"PRIu64" times\n",
i,
p_breakpoint->num_hits);
}
*p_out_print |= p_breakpoint->do_print;
*p_out_stop |= p_breakpoint->do_stop;
if (p_breakpoint->p_command_list != NULL) {
util_string_list_append_list(p_debug->p_pending_commands,
p_breakpoint->p_command_list);
}
}
}
static int
debug_sort_opcodes(const void* p_op1, const void* p_op2) {
uint8_t op1 = *(uint8_t*) p_op1;
uint8_t op2 = *(uint8_t*) p_op2;
return (s_p_debug->count_opcode[op1] - s_p_debug->count_opcode[op2]);
}
static int
debug_sort_addrs(const void* p_addr1, const void* p_addr2) {
uint16_t addr1 = *(uint16_t*) p_addr1;
uint16_t addr2 = *(uint16_t*) p_addr2;
return (s_p_debug->count_addr[addr1] - s_p_debug->count_addr[addr2]);
}
static void
debug_clear_stats(struct debug_struct* p_debug) {
uint32_t i;
for (i = 0; i < k_6502_addr_space_size; ++i) {
p_debug->count_addr[i] = 0;
}
for (i = 0; i < k_6502_op_num_opcodes; ++i) {
p_debug->count_opcode[i] = 0;
}
for (i = 0; i < k_6502_op_num_types; ++i) {
p_debug->count_optype[i] = 0;
}
for (i = 0; i < k_6502_op_num_modes; ++i) {
p_debug->count_opmode[i] = 0;
}
p_debug->rom_write_faults = 0;
p_debug->branch_not_taken = 0;
p_debug->branch_taken = 0;
p_debug->branch_taken_page_crossing = 0;
p_debug->abn_reads = 0;
p_debug->abn_reads_with_page_crossing = 0;
p_debug->idy_reads = 0;
p_debug->idy_reads_with_page_crossing = 0;
p_debug->adc_sbc_count = 0;
p_debug->adc_sbc_with_decimal_count = 0;
p_debug->register_reads = 0;
p_debug->register_writes = 0;
}
static void
debug_dump_stats(struct debug_struct* p_debug) {
size_t i;
uint8_t sorted_opcodes[k_6502_op_num_opcodes];
uint16_t sorted_addrs[k_6502_addr_space_size];
for (i = 0; i < k_6502_op_num_opcodes; ++i) {
sorted_opcodes[i] = i;
}
qsort(sorted_opcodes,
k_6502_op_num_opcodes,
sizeof(uint8_t),
debug_sort_opcodes);
(void) printf("=== Opcodes ===\n");
for (i = 0; i < k_6502_op_num_opcodes; ++i) {
char opcode_buf[k_max_opcode_len];
uint8_t opcode = sorted_opcodes[i];
uint64_t count = p_debug->count_opcode[opcode];
if (!count) {
continue;
}
debug_print_opcode(p_debug,
opcode_buf,
sizeof(opcode_buf),
opcode,
0,
0,
0xFFFE,
0);
(void) printf("%14s: %"PRIu64"\n", opcode_buf, count);
}
for (i = 0; i < k_6502_addr_space_size; ++i) {
sorted_addrs[i] = i;
}
qsort(sorted_addrs,
k_6502_addr_space_size,
sizeof(uint16_t),
debug_sort_addrs);
(void) printf("=== Addrs ===\n");
for (i = k_6502_addr_space_size - 256; i < k_6502_addr_space_size; ++i) {
uint16_t addr = sorted_addrs[i];
uint64_t count = p_debug->count_addr[addr];
if (!count) {
continue;
}
(void) printf("%4"PRIX16": %"PRIu64"\n", addr, count);
}
(void) printf("--> rom_write_faults: %"PRIu64"\n", p_debug->rom_write_faults);
(void) printf("--> branch (not taken, taken, page cross): "
"%"PRIu64", %"PRIu64", %"PRIu64"\n",
p_debug->branch_not_taken,
p_debug->branch_taken,
p_debug->branch_taken_page_crossing);
(void) printf("--> abn reads (total, page crossing): %"PRIu64", %"PRIu64"\n",
p_debug->abn_reads,
p_debug->abn_reads_with_page_crossing);
(void) printf("--> idy reads (total, page crossing): %"PRIu64", %"PRIu64"\n",
p_debug->idy_reads,
p_debug->idy_reads_with_page_crossing);
(void) printf("--> abc/sbc (total, with decimal flag): "
"%"PRIu64", %"PRIu64"\n",
p_debug->adc_sbc_count,
p_debug->adc_sbc_with_decimal_count);
(void) printf("--> register hits (read / write): %"PRIu64", %"PRIu64"\n",
p_debug->register_reads,
p_debug->register_writes);
}
static void
debug_dump_breakpoints(struct debug_struct* p_debug) {
uint32_t i;
for (i = 0; i < k_max_break; ++i) {
struct debug_breakpoint* p_breakpoint = &p_debug->breakpoints[i];
if (!p_breakpoint->is_in_use) {
continue;
}
(void) printf("breakpoint %"PRIu32":", i);
if (p_breakpoint->has_exec_range) {
(void) printf(" exec @$%.4"PRIX16"-$%.4"PRIX16,
(uint16_t) p_breakpoint->exec_start,
(uint16_t) p_breakpoint->exec_end);
}
if (p_breakpoint->has_memory_range) {
const char* p_name = "read";
if (p_breakpoint->is_memory_write) {
if (p_breakpoint->is_memory_read) {
p_name = "rw";
} else {
p_name = "write";
}
}
(void) printf(" %s @$%.4"PRIX16"-$%.4"PRIX16,
p_name,
(uint16_t) p_breakpoint->memory_start,
(uint16_t) p_breakpoint->memory_end);
}
if (p_breakpoint->p_expression != NULL) {
const char* p_str = expression_get_original_string(
p_breakpoint->p_expression);
(void) printf(" expr '%s'", p_str);
}
if (p_breakpoint->p_command_list != NULL) {
(void) printf(" commands '%s'", p_breakpoint->p_command_list_str);
}
if (!p_breakpoint->is_enabled) {
(void) printf(" disabled");
}
(void) printf(" hit %"PRIu64, p_breakpoint->num_hits);
(void) printf("\n");
}
}
static inline void
debug_check_unusual(struct debug_struct* p_debug,
uint8_t opcode,
uint8_t operand1,
uint8_t optype,
uint8_t opmode,
int is_rom,
int is_register,
int wrapped_8bit,
int wrapped_16bit) {
int warned;
uint8_t warn_count = p_debug->warn_at_addr_count[p_debug->reg_pc];
if (!warn_count) {
return;
}
warned = 0;
if (is_register && ((opmode == k_idx) || (opmode == k_idy))) {
(void) printf("DEBUG (UNUSUAL): "
"Indirect access to register $%.4"PRIX16" at $%.4"PRIX16"\n",
(uint16_t) p_debug->addr_6502,
p_debug->reg_pc);
warned = 1;
}
/* Handled via various means but worth noting. */
if (p_debug->is_write && is_rom) {
(void) printf("DEBUG: Code at $%.4"PRIX16" is writing to ROM "
"at $%.4"PRIX16"\n",
p_debug->reg_pc,
(uint16_t) p_debug->addr_6502);
warned = 1;
}
/* Look for zero page wrap or full address space wraps. */
if ((opmode != k_rel) && wrapped_8bit) {
if (opmode == k_idx) {
(void) printf("DEBUG (VERY UNUSUAL): "
"8-bit IDX ADDRESS WRAP at $%.4"PRIX16" to $%.4"PRIX16"\n",
p_debug->reg_pc,
(uint16_t) (uint8_t) (operand1 + p_debug->reg_x));
warned = 1;
} else {
(void) printf("DEBUG (UNUSUAL): 8-bit ADDRESS WRAP at "
"$%.4"PRIX16" to $%.4"PRIX16"\n",
p_debug->reg_pc,
(uint16_t) p_debug->addr_6502);
warned = 1;
}
}
if (wrapped_16bit) {
(void) printf("DEBUG (VERY UNUSUAL): "
"16-bit ADDRESS WRAP at $%.4"PRIX16" to $%.4"PRIX16"\n",
p_debug->reg_pc,
(uint16_t) p_debug->addr_6502);
warned = 1;
}
if (((opmode == k_idy) || (opmode == k_ind)) && (operand1 == 0xFF)) {
(void) printf("DEBUG (PSYCHOTIC): $FF ADDRESS FETCH at $%.4"PRIX16"\n",
p_debug->reg_pc);
warned = 1;
} else if ((opmode == k_idx) &&
(((uint8_t) (operand1 + p_debug->reg_x)) == 0xFF)) {
(void) printf("DEBUG (PSYCHOTIC): $FF ADDRESS FETCH at $%.4"PRIX16"\n",
p_debug->reg_pc);
warned = 1;
}
if ((optype >= k_first_6502_undocumented) &&
(optype <= k_last_6502_undocumented)) {
(void) printf("DEBUG: undocumented opcode $%.2X at $%.4"PRIX16"\n",
opcode,
p_debug->reg_pc);
warned = 1;
}
if (!warned) {
return;
}
warn_count--;
if (!warn_count) {
(void) printf("DEBUG: log suppressed for this address\n");
}
p_debug->warn_at_addr_count[p_debug->reg_pc] = warn_count;
}
static void
debug_load_raw(struct debug_struct* p_debug,
const char* p_file_name,