mirror of
https://github.com/digarok/gsplus.git
synced 2024-05-31 17:41:28 +00:00
d7a92f4441
cop=1 brk=1 to enable brk/cop support. cop/brk instructions will be caught *BEFORE* execution and drop into the debugger shell. step/go/next will execute the instruction as normal. %pc++ will skip over the instruction.
1563 lines
30 KiB
Plaintext
1563 lines
30 KiB
Plaintext
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/*
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* requires re2c (http://re2c.org)
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*
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*/
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#include <stdio.h>
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#include <stdarg.h>
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#include <ctype.h>
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#include <string.h>
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#include <unistd.h>
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#include <signal.h>
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#include "defc.h"
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#include "disasm.h"
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extern char *x_readline(const char *prompt);
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extern int g_fullscreen;
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extern int g_config_control_panel;
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extern Engine_reg engine;
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extern int halt_sim;
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int g_num_mp_breakpoints = 0;
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word32 g_mp_breakpoints[MAX_BREAK_POINTS];
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int g_num_bp_breakpoints = 0;
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word32 g_bp_breakpoints[MAX_BREAK_POINTS];
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int g_num_tp_breakpoints = 0;
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word32 g_tp_breakpoints[MAX_BREAK_POINTS];
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int g_dbg_shell = 0;
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int g_stepping = 0;
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word32 g_abort_address = 0;
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word32 g_abort_value = 0;
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word32 g_abort_bytes = 0;
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static word32 g_prev_address = 0;
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static word32 g_prev_stack_address = 0;
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static word32 g_prev_stack_bank = 0;
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static int g_templates_loaded = 0;
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extern void debug_load_templates(const char *path);
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extern word32 debug_apply_template(word32 address, const char *name);
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extern void debug_load_nifty(const char *path);
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extern const char *debug_tool_name(unsigned, unsigned vector);
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#if defined(__APPLE__)
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#include <mach-o/dyld.h>
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static char *get_resource_path(const char *leaf) {
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uint32_t size = 0;
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char *buffer = 0;
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int ok;
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char *cp;
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int l;
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l = strlen(leaf);
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ok = _NSGetExecutablePath(NULL, &size);
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size += l + 1 + sizeof("Resources/");
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buffer = malloc(size);
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if (!buffer) return NULL;
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/*
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* expect .../GSPlus.app/Contents/MacOS/GSPlus
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* drop
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*/
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ok = _NSGetExecutablePath(buffer, &size);
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if (ok < 0) {
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free(buffer);
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return NULL;
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}
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cp = strrchr(buffer, '/');
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if (!cp) { free(buffer); return NULL; }
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*cp = 0;
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cp = strrchr(buffer, '/');
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if (!cp) { free(buffer); return NULL; }
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strcpy(cp + 1, "Resources/");
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strcat(cp, leaf);
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return buffer;
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}
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#elif defined(_WIN32)
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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/* todo -- something clever like find the home directory */
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static char *get_resource_path(const char *leaf) {
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DWORD size;
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char *buffer = 0;
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char *cp;
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int l;
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l = strlen(leaf);
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size = GetModuleFileName(NULL, buffer, 0);
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if (size == 0) return strdup(leaf);
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size += l + 2;
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buffer = malloc(size);
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if (!buffer) return NULL;
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size = GetModuleFileName(NULL, buffer, size);
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if (!size) return strdup(leaf);
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cp = strrchr(buffer, '\\');
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strcpy(cp + 1, leaf);
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return buffer;
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}
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#else
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static char *get_resource_path(const char *leaf) {
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int l;
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char *cp;
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static char path[] = "/usr/local/share/gsplus/";
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l = strlen(leaf);
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cp = malloc(l + sizeof(path) + 1);
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if (!cp) return NULL;
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strcpy(cp, path);
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strcat(cp, leaf);
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return cp;
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}
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#endif
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/*
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* todo
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* - tool break support
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* - gs/os break support
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* - p8 break support
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* - nifty list data files
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* - gsbug template files
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* - r -> run to next rts/rtl
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* - n -> step over jsl/jsr [ temporary breakpoints? ]
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* - ! -> mini assembler
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* - option to drop into debug shell on BRK command
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*/
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word32 do_hexdump(word32 address, int lines) {
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static char hex[] = "0123456789abcdef";
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char buffer1[64];
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char buffer2[20];
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int i;
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while (--lines) {
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char *cp = buffer1;
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for (i = 0; i < 16; ++i) {
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uint8_t c = get_memory_c(address + i, 0);
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*cp++ = hex[c >> 4];
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*cp++ = hex[c & 0x0f];
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*cp++ = ' ';
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if (i == 7) *cp++ = ' ';
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buffer2[i] = (c < 0x80) && isprint(c) ? c : '.';
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}
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*cp = 0;
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buffer2[16] = 0;
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printf("%02x/%04x: %s %s\n",
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address >> 16, address & 0xffff,
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buffer1, buffer2
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);
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address += 16;
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address &= 0xffffff;
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}
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return address;
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}
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static int check_stack_rts(word32 address, unsigned bank, char *buffer) {
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word32 rt;
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unsigned op;
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rt = get_memory24_c(address, 0);
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if (rt == 0) return 0;
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rt = (rt & 0xff0000) | ((rt - 3) & 0xffff);
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op = get_memory_c(rt, 0);
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if (op == 0x22) {
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word32 tmp = get_memory24_c(rt + 1, 0); /* crosses bank :/ */
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/* todo -- check if tmp is known address, include below */
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/* todo -- if jsl e10000, check for prev. ldx # */
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sprintf(buffer, "%02x/%04x: JSL %06x",
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rt >> 16, rt & 0xffff, tmp);
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return 3;
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}
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/* sigh... this might re-check 0000 a lot */
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rt = get_memory16_c(address, 0);
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rt = bank | ((rt - 2) & 0xffff);
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op = get_memory_c(rt, 0);
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if (op == 0x20 || op == 0xfc) {
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word32 tmp = get_memory16_c(rt + 1, 0);
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if (op == 0x20) {
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sprintf(buffer, "%02x/%04x: JSR %04x",
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rt >> 16, rt & 0xffff, tmp);
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}
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if (op == 0xfc) {
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sprintf(buffer, "%02x/%04x: JSR (%04x,x)",
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rt >> 16, rt & 0xffff, tmp);
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}
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return 2;
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}
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return 0;
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}
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word32 do_stack(word32 address, unsigned bank) {
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/* scan through stack.
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* if address looks like jsr return address
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* or jsl return address, print it.
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* otherwise, hexdump it.
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*
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* jsr absolute = 0x20
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* jsr (absolute,x) = 0xfc
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* jsl abslong = 0x22
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*
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*
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* TODO - in Niftylist, JSL updates the bank.
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* TODO - don't display c000, etc.
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*/
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static char hex[] = "0123456789abcdef";
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char buffer1[64];
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char buffer2[64];
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unsigned offset = 0;
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unsigned line = 0;
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char *cp = buffer1;
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++address;
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while(line < 20) {
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unsigned c;
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int tmp = check_stack_rts(address + offset, bank, buffer2);
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if (tmp) {
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/* flush any pending data */
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if (offset) {
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*cp = 0;
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printf("%02x/%04x: %s\n",
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address >> 16, address & 0xffff, buffer1);
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++line;
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address += offset;
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offset = 0;
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cp = buffer1;
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}
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for (offset = 0; offset < tmp; ++offset) {
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c = get_memory_c(address + offset, 0);
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*cp++ = hex[c >> 4];
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*cp++ = hex[c & 0x0f];
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*cp++ = ' ';
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}
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*cp = 0;
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printf("%02x/%04x: %-12s%s\n",
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address >> 16, address & 0xffff, buffer1, buffer2);
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++line;
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address += offset;
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offset = 0;
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cp = buffer1;
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continue;
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}
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c = get_memory_c(address + offset, 0);
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*cp++ = hex[c >> 4];
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*cp++ = hex[c & 0x0f];
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*cp++ = ' ';
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if (offset == 7) *cp++ = ' ';
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++offset;
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if (offset == 16) {
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*cp = 0;
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printf("%02x/%04x: %s\n",
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address >> 16, address & 0xffff, buffer1);
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++line;
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address += offset;
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offset = 0;
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cp = buffer1;
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}
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}
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return address;
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}
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struct disasm_cookie {
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unsigned psr;
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unsigned x;
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};
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static int is_jsl_e10000(word32 address) {
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return get_memory_c(address, 0) == 0x22 &&
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get_memory24_c(address + 1, 0) == 0xe10000;
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}
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static int is_jsl_e10008(word32 address) {
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return get_memory_c(address, 0) == 0x22 &&
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get_memory24_c(address + 1, 0) == 0xe10008;
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}
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static int is_jsl_e100a8(word32 address) {
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return get_memory_c(address, 0) == 0x22 &&
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get_memory24_c(address + 1, 0) == 0xe100a8;
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}
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static int is_jsl_e100b0(word32 address) {
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return get_memory_c(address, 0) == 0x22 &&
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get_memory24_c(address + 1, 0) == 0xe100b0;
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}
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static int is_jsr_bf00(word32 address) {
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return get_memory_c(address, 0) == 0x20 &&
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get_memory16_c(address + 1, 0) == 0xbf00;
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}
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static int g_disasm_psr;
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word32 do_list(word32 address, int lines) {
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unsigned char buffer2[32];
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char buffer[32];
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const char *opcode_string;
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const char *comment;
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unsigned opcode;
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unsigned dtype;
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unsigned operand;
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word32 pc;
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int i;
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int args;
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int n;
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while (lines--) {
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int bsize = 0;
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unsigned bank;
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pc = address;
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opcode = get_memory_c(address++, 0);
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dtype = disasm_types[opcode];
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args = dtype >> 8;
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buffer2[bsize++] = opcode;
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opcode_string = disasm_opcodes[opcode];
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comment = NULL;
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switch (args) {
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case 4:
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args = g_disasm_psr & 0x20 ? 1 : 2;
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break;
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case 5:
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args = g_disasm_psr & 0x10 ? 1 : 2;
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break;
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}
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operand = 0;
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switch(args) {
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case 1:
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operand = get_memory_c(address, 0);
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buffer2[bsize++] = operand;
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break;
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case 2:
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operand = get_memory16_c(address, 0);
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buffer2[bsize++] = operand;
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buffer2[bsize++] = operand >> 8;
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break;
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case 3:
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operand = get_memory24_c(address, 0);
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buffer2[bsize++] = operand;
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buffer2[bsize++] = operand >> 8;
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buffer2[bsize++] = operand >> 16;
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break;
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}
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address += args;
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buffer[0] = 0;
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switch(dtype & 0xff) {
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case ABS:
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sprintf(buffer, "$%04x", operand);
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break;
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case ABSX:
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sprintf(buffer, "$%04x,x", operand);
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break;
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case ABSY:
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sprintf(buffer, "$%04x,y", operand);
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break;
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case ABSIND:
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sprintf(buffer,"($%04x)",operand );
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break;
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case ABSXIND:
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sprintf(buffer,"($%04x,x)",operand );
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break;
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case IMPLY:
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break;
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case ACCUM:
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break;
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case IMMED:
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sprintf(buffer,"#$%0*x",args * 2, operand);
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break;
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case JUST8:
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sprintf(buffer,"$%02x",operand);
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break;
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case DLOC:
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sprintf(buffer,"$%02x",operand);
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break;
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case DLOCX:
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sprintf(buffer,"$%02x,x",operand);
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break;
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case DLOCY:
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sprintf(buffer,"$%02x,y",operand);
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break;
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case ABSLONG:
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sprintf(buffer,"$%06x",operand);
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bank = operand >> 16;
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if (bank == 0xe0 || bank == 0xe1 || bank == 0x01 || bank == 0xff)
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comment = debug_tool_name(operand & 0xffff, bank);
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break;
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case ABSLONGX:
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sprintf(buffer,"$%06x,x",operand);
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bank = operand >> 16;
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if (bank == 0xe0 || bank == 0xe1 || bank == 0x01 || bank == 0xff)
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comment = debug_tool_name(operand & 0xffff, bank);
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break;
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case DLOCIND:
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sprintf(buffer,"($%02x)",operand);
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break;
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case DLOCINDY:
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sprintf(buffer,"($%02x),y",operand);
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break;
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case DLOCXIND:
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sprintf(buffer,"($%02x,x)",operand);
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break;
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case DLOCBRAK:
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sprintf(buffer,"[$%02x]",operand);
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break;
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case DLOCBRAKY:
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sprintf(buffer,"[$%02x],y",operand);
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break;
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case DISP8:
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sprintf(buffer,"$%04x",
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(address+(int8_t)operand) & 0xffff);
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break;
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case DISP8S:
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sprintf(buffer,"$%02x,s",operand);
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break;
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case DISP8SINDY:
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sprintf(buffer,"($%02x,s),y",operand);
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break;
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case DISP16:
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sprintf(buffer,"$%04x",
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(address+(int16_t)(operand)) & 0xffff);
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break;
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case MVPMVN:
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sprintf(buffer,"$%02x,$%02x",operand & 0xff,operand >> 8);
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break;
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case SEPVAL:
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case REPVAL:
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sprintf(buffer,"#$%02x",operand);
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break;
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}
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if (!comment) {
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bank = pc >> 16;
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if (bank == 0xe0 || bank == 0xe1 || bank == 0x01 || bank == 0xff)
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comment = debug_tool_name(pc & 0xffff, bank);
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}
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switch (opcode) {
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case 0xe2: /* sep */
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g_disasm_psr|= operand;
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break;
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case 0xc2: /* rep */
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g_disasm_psr &= ~operand;
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break;
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case 0xfb: /* xce */
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g_disasm_psr |= 0x0130;
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break;
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case 0xa2: /* ldx # */
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if (is_jsl_e10000(address)) {
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/* tool call ... */
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const char *name = debug_tool_name(operand, 0xe10000);
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if (name) {
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opcode_string = name;
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buffer[0] = 0;
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for (i = 0; i < 4; ++i) {
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buffer2[bsize++] = get_memory_c(address++, 0);
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}
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}
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}
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break;
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case 0xae: /* ldx ... */
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case 0xbe:
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case 0xa6:
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case 0xb6:
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case 0xfa: /* plx */
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case 0xaa: /* tax */
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case 0xba: /* tsx */
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case 0xbb: /* tyx */
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case 0xca: /* dex */
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case 0xe8: /* inx */
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break;
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case 0x22: /* jsl */
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if (operand == 0xe100a8) {
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/* inline GS/OS call? */
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unsigned num = get_memory16_c(address, 0);
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const char *name = debug_tool_name(num, operand);
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if (name) {
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comment = NULL;
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opcode_string = name;
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unsigned parms = get_memory24_c(address + 2, 0);
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sprintf(buffer, "$%06x", parms);
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for (i = 0; i < 6; ++i) {
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buffer2[bsize++] = get_memory_c(address++, 0);
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}
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}
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}
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break;
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case 0x20: /* jsr */
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if (operand == 0xbf00) {
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unsigned num = get_memory_c(address, 0);
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const char *name = debug_tool_name(num, operand);
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if (name) {
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opcode_string = name;
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unsigned parms = get_memory16_c(address + 1, 0);
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sprintf(buffer, "$%04x", parms);
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for (i = 0; i < 3; ++i) {
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buffer2[bsize++] = get_memory_c(address++, 0);
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}
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}
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}
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break;
|
|
}
|
|
|
|
n = printf("%02x/%04x: %s %s",
|
|
pc >> 16, pc & 0xffff,
|
|
opcode_string, buffer);
|
|
for(; n < 40; ++n) putchar(' ');
|
|
|
|
for(i = 0; i < bsize; ++i) {
|
|
n += printf(" %02x", buffer2[i]);
|
|
}
|
|
if (comment) {
|
|
printf("%*s; %s", 60 - n, "", comment);
|
|
}
|
|
fputc('\n', stdout);
|
|
}
|
|
return address;
|
|
}
|
|
|
|
#if 0
|
|
word32 next_pc(void) {
|
|
/* return next pc, skipping subroutines,
|
|
accounting for inline calls, and branches
|
|
*/
|
|
word32 pc = engine.kpc;
|
|
|
|
enum {
|
|
C = 1 << 0,
|
|
Z = 1 << 1,
|
|
I = 1 << 2,
|
|
D = 1 << 3,
|
|
X = 1 << 4,
|
|
M = 1 << 5,
|
|
V = 1 << 6,
|
|
N = 1 << 7,
|
|
E = 1 << 8
|
|
};
|
|
|
|
unsigned opcode = get_memory_c(pc++, 0);
|
|
unsigned operand = 0;
|
|
|
|
unsigned dtype = disasm_types[opcode];
|
|
unsigned args = dtype >> 8;
|
|
|
|
switch (args) {
|
|
case 4:
|
|
args = engine.psr & M ? 1 : 2;
|
|
break;
|
|
case 5:
|
|
args = engine.psr & X ? 1 : 2;
|
|
break;
|
|
}
|
|
operand = 0;
|
|
switch(args) {
|
|
case 1:
|
|
operand = get_memory_c(pc, 0);
|
|
break;
|
|
case 2:
|
|
operand = get_memory16_c(pc, 0);
|
|
break;
|
|
case 3:
|
|
operand = get_memory24_c(pc, 0);
|
|
break;
|
|
}
|
|
pc += args;
|
|
|
|
switch (opcode) {
|
|
case 0x20:
|
|
if ((pc & 0xff0000) == 0 && operand == 0xbf00)
|
|
return pc + 3;
|
|
break;
|
|
case 0x22:
|
|
if (operand == 0xe100a8)
|
|
return pc + 6;
|
|
break;
|
|
|
|
case 0x82: /* brl */
|
|
operand += pc & 0xffff;
|
|
return (pc & 0xff0000) | operand;
|
|
break;
|
|
case 0x80: /* bra */
|
|
operand = (pc + (int8_t)operand) & 0xffff;
|
|
return (pc & 0xff0000) | operand;
|
|
break;
|
|
|
|
case 0x90: /* bcc */
|
|
operand = (pc + (int8_t)operand) & 0xffff;
|
|
if (~engine.psr & C)
|
|
return (pc & 0xff0000) | operand;
|
|
break;
|
|
case 0xb0: /* bcc */
|
|
operand = (pc + (int8_t)operand) & 0xffff;
|
|
if (engine.psr & C)
|
|
return (pc & 0xff0000) | operand;
|
|
break;
|
|
|
|
case 0x10: /* bpl */
|
|
operand = (pc + (int8_t)operand) & 0xffff;
|
|
if (~engine.psr & N)
|
|
return (pc & 0xff0000) | operand;
|
|
break;
|
|
case 0x30: /* bmi */
|
|
operand = (pc + (int8_t)operand) & 0xffff;
|
|
if (engine.psr & N)
|
|
return (pc & 0xff0000) | operand;
|
|
break;
|
|
|
|
case 0x50: /* bvc */
|
|
operand = (pc + (int8_t)operand) & 0xffff;
|
|
if (~engine.psr & V)
|
|
return (pc & 0xff0000) | operand;
|
|
break;
|
|
case 0x70: /* bvs */
|
|
operand = (pc + (int8_t)operand) & 0xffff;
|
|
if (engine.psr & V)
|
|
return (pc & 0xff0000) | operand;
|
|
break;
|
|
|
|
case 0xd0: /* bvc */
|
|
operand = (pc + (int8_t)operand) & 0xffff;
|
|
if (~engine.psr & Z)
|
|
return (pc & 0xff0000) | operand;
|
|
break;
|
|
case 0xf0: /* beq */
|
|
operand = (pc + (int8_t)operand) & 0xffff;
|
|
if (engine.psr & Z)
|
|
return (pc & 0xff0000) | operand;
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* todo --
|
|
* should use tmp breakpoint instead of g_stepping?
|
|
* don't want to step into an interrupt, for example.
|
|
* also, step should steps over gs/os, toolbox calls
|
|
* (gsbug has protected memory ranges)
|
|
*/
|
|
int next_pc(void) {
|
|
|
|
word32 pc = engine.kpc;
|
|
unsigned opcode = get_memory_c(pc++, 0);
|
|
unsigned operand = 0;
|
|
|
|
switch (opcode) {
|
|
case 0x20: /* jsr abs */
|
|
operand = get_memory16_c(pc, 0);
|
|
pc += 2;
|
|
if ((pc & 0xff0000) == 0 && operand == 0xbf00)
|
|
pc += 3;
|
|
return pc;
|
|
break;
|
|
case 0xfc: /* jsr (abs,x) */
|
|
return pc + 2;
|
|
break;
|
|
case 0x22: /* jsl */
|
|
operand = get_memory24_c(pc, 0);
|
|
pc += 3;
|
|
if (operand == 0xe100a8)
|
|
pc += 6;
|
|
return pc;
|
|
break;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
enum {
|
|
REG_A,
|
|
REG_B,
|
|
REG_D,
|
|
REG_E,
|
|
REG_K,
|
|
REG_MX,
|
|
REG_P,
|
|
REG_PC,
|
|
REG_S,
|
|
REG_X,
|
|
REG_Y,
|
|
};
|
|
|
|
static word32 to_hex(const char *iter, const char *end) {
|
|
word32 rv = 0;
|
|
while(iter != end) {
|
|
char c = *iter++;
|
|
rv <<= 4;
|
|
if (isdigit(c)) rv |= c - '0';
|
|
else rv |= (c | 0x20) - 'a' + 10;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
|
|
/*!re2c
|
|
re2c:define:YYCTYPE = char;
|
|
re2c:yyfill:enable = 0;
|
|
eol = "\x00";
|
|
ws = [ \t];
|
|
x = [A-Fa-f0-9];
|
|
*/
|
|
|
|
static int do_assign(const char *cp, int reg) {
|
|
|
|
word32 addr = 0;
|
|
int has_bank = 0;
|
|
const char *YYCURSOR = cp;
|
|
const char *YYMARKER = NULL;
|
|
const char *YYCTXMARKER = NULL;
|
|
|
|
/*!re2c
|
|
|
|
* { return -1; }
|
|
x{6} eol {
|
|
addr = to_hex(cp, cp + 6);
|
|
has_bank = 1;
|
|
goto next;
|
|
}
|
|
x{2} "/" x{4} eol {
|
|
addr = to_hex(cp, cp + 2) << 16;
|
|
addr |= to_hex(cp + 3, cp + 7);
|
|
has_bank = 1;
|
|
goto next;
|
|
}
|
|
x{4} eol {
|
|
addr = to_hex(cp, cp + 4);
|
|
has_bank = 0;
|
|
goto next;
|
|
}
|
|
"%"[01]{2} eol {
|
|
if (reg != REG_MX) return -1;
|
|
if (cp[1] == '1') addr |= 0x20;
|
|
if (cp[2] == '1') addr |= 0x10;
|
|
goto next;
|
|
}
|
|
"%pc" eol {
|
|
addr = engine.kpc;
|
|
has_bank = 1;
|
|
goto next;
|
|
}
|
|
"%a" eol {
|
|
addr = engine.acc;
|
|
goto next;
|
|
}
|
|
"%x" eol {
|
|
addr = engine.xreg;
|
|
goto next;
|
|
}
|
|
"%y" eol {
|
|
addr = engine.yreg;
|
|
goto next;
|
|
}
|
|
"%d" eol {
|
|
addr = engine.direct;
|
|
goto next;
|
|
}
|
|
"%s" eol {
|
|
addr = engine.stack;
|
|
goto next;
|
|
}
|
|
"%b" eol {
|
|
addr = engine.dbank;
|
|
goto next;
|
|
}
|
|
"%k" eol {
|
|
addr = engine.kpc >> 16;
|
|
goto next;
|
|
}
|
|
"%p" eol {
|
|
addr = engine.psr & 0xff;
|
|
goto next;
|
|
}
|
|
"%e" eol {
|
|
addr = engine.psr >> 8;
|
|
goto next;
|
|
}
|
|
*/
|
|
|
|
next:
|
|
|
|
if (has_bank && reg != REG_PC) return -1;
|
|
|
|
switch(reg) {
|
|
case REG_A: engine.acc = addr; break;
|
|
case REG_X: engine.xreg = addr; break;
|
|
case REG_Y: engine.yreg = addr; break;
|
|
case REG_D: engine.direct = addr; break;
|
|
case REG_S: engine.stack = addr; break;
|
|
case REG_B: engine.dbank = addr & 0xff; break;
|
|
|
|
case REG_E:
|
|
engine.psr &= 0xff;
|
|
if (addr) engine.psr |= 0x0100;
|
|
break;
|
|
|
|
case REG_K:
|
|
addr = (addr & 0xff) << 16;
|
|
engine.kpc = (engine.kpc & 0xffff) | addr;
|
|
break;
|
|
|
|
case REG_PC:
|
|
if (!has_bank) addr |= (engine.kpc & 0xff0000);
|
|
engine.kpc = addr;
|
|
break;
|
|
|
|
case REG_P:
|
|
engine.psr &= ~0xff;
|
|
engine.psr |= (addr & 0xff);
|
|
break;
|
|
|
|
case REG_MX:
|
|
/* only 00, 10, 20, 30 are legal values */
|
|
if ((addr | 0x30) != 0x30) return -1;
|
|
engine.psr &= ~0x30;
|
|
engine.psr |= addr;
|
|
break;
|
|
|
|
|
|
}
|
|
|
|
/* fixup registers */
|
|
if (engine.psr & 0x0100) {
|
|
engine.psr |= 0x30;
|
|
engine.stack = (engine.stack & 0xff) | 0x0100;
|
|
}
|
|
if (engine.psr & 0x10) {
|
|
engine.xreg &= 0xff;
|
|
engine.yreg &= 0xff;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int do_brk_cop(const char *cp, int which) {
|
|
/* brk=1 / brk=0 */
|
|
|
|
const char *YYCURSOR = cp;
|
|
int value = 0;
|
|
|
|
/*!re2c
|
|
[01] eol {
|
|
value = *cp - '0';
|
|
goto next;
|
|
}
|
|
* { return -1; }
|
|
*/
|
|
next:
|
|
|
|
switch(which) {
|
|
case 0x00:
|
|
engine.flags &= ~FLAG_WANT_BRK;
|
|
if (value) engine.flags |= FLAG_WANT_BRK;
|
|
printf("brk intercept %s\n\n", value ? "on" : "off");
|
|
break;
|
|
case 0x02:
|
|
engine.flags &= ~FLAG_WANT_COP;
|
|
if (value) engine.flags |= FLAG_WANT_COP;
|
|
printf("cop intercept %s\n\n", value ? "on" : "off");
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static word32 do_mem_assign(word32 addr, const char *cp) {
|
|
/* "string" -> pokes ASCII chars */
|
|
/* 'string' -> pokes ASCII chars | 0x80 */
|
|
/* xx -> pokes hex byte */
|
|
|
|
const char *YYCURSOR = cp;
|
|
const char *YYMARKER = NULL;
|
|
const char *YYCTXMARKER = NULL;
|
|
|
|
for(;;) {
|
|
const char *start = YYCURSOR;
|
|
/*!re2c
|
|
eol { return addr; }
|
|
ws { continue; }
|
|
* {
|
|
fputs("Invalid data\n", stderr);
|
|
return addr;
|
|
}
|
|
x{2} {
|
|
set_memory_c(addr++, to_hex(start, YYCURSOR), 0);
|
|
continue;
|
|
}
|
|
["] [^"\x00]* ["] {
|
|
for(++start; start < YYCURSOR -1; ++start) {
|
|
set_memory_c(addr++, *start, 0);
|
|
}
|
|
continue;
|
|
}
|
|
['] [^'\x00]* ['] {
|
|
for(++start; start < YYCURSOR -1; ++start) {
|
|
set_memory_c(addr++, *start | 0x80, 0);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
*/
|
|
}
|
|
}
|
|
|
|
|
|
static int addr_cmp(const void *a, const void *b) {
|
|
word32 aa = *(const word32 *)a;
|
|
word32 bb = *(const word32 *)b;
|
|
|
|
return (int)aa - (int)bb;
|
|
}
|
|
|
|
|
|
|
|
void show_bp(int type) {
|
|
int i;
|
|
word32 addr;
|
|
word32 *breakpoints;
|
|
int num_breakpoints;
|
|
|
|
switch(type) {
|
|
case 'B':
|
|
breakpoints = g_bp_breakpoints;
|
|
num_breakpoints = g_num_bp_breakpoints;
|
|
break;
|
|
case 'M':
|
|
breakpoints = g_mp_breakpoints;
|
|
num_breakpoints = g_num_mp_breakpoints;
|
|
break;
|
|
|
|
case 'T':
|
|
breakpoints = g_tp_breakpoints;
|
|
num_breakpoints = g_num_tp_breakpoints;
|
|
break;
|
|
|
|
|
|
default:
|
|
fputs("Invalid breakpoint type\n", stderr);
|
|
return;
|
|
}
|
|
|
|
fputs("Breakpoints:\n", stdout);
|
|
for (i = 0; i < num_breakpoints; ++i) {
|
|
addr = breakpoints[i];
|
|
printf("%02x/%04x\n", addr >> 16, addr & 0xffff);
|
|
}
|
|
}
|
|
|
|
int set_bp(int type, word32 addr) {
|
|
int i;
|
|
|
|
word32 *breakpoints;
|
|
int num_breakpoints;
|
|
|
|
switch(type) {
|
|
case 'B':
|
|
breakpoints = g_bp_breakpoints;
|
|
num_breakpoints = g_num_bp_breakpoints;
|
|
break;
|
|
case 'M':
|
|
breakpoints = g_mp_breakpoints;
|
|
num_breakpoints = g_num_mp_breakpoints;
|
|
break;
|
|
case 'T':
|
|
breakpoints = g_tp_breakpoints;
|
|
num_breakpoints = g_num_tp_breakpoints;
|
|
break;
|
|
|
|
default:
|
|
fputs("Invalid breakpoint type\n", stderr);
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < num_breakpoints; ++i) {
|
|
if (breakpoints[i] == addr) break;
|
|
}
|
|
|
|
if (i < num_breakpoints) return 1; /* already set */
|
|
if (num_breakpoints == MAX_BREAK_POINTS) {
|
|
printf("Too many breakpoints.\n");
|
|
return 0;
|
|
}
|
|
breakpoints[num_breakpoints++] = addr;
|
|
|
|
switch(type) {
|
|
case 'B': g_num_bp_breakpoints = num_breakpoints; break;
|
|
case 'M': g_num_mp_breakpoints = num_breakpoints; break;
|
|
case 'T': g_num_tp_breakpoints = num_breakpoints; break;
|
|
}
|
|
|
|
qsort(breakpoints, num_breakpoints, sizeof(word32), addr_cmp);
|
|
fixup_brks();
|
|
return 1;
|
|
}
|
|
|
|
/* returns 1 if address deleted */
|
|
int delete_bp(int type, word32 addr) {
|
|
int i;
|
|
|
|
word32 *breakpoints;
|
|
int num_breakpoints;
|
|
|
|
switch(type) {
|
|
case 'B':
|
|
breakpoints = g_bp_breakpoints;
|
|
num_breakpoints = g_num_bp_breakpoints;
|
|
break;
|
|
case 'M':
|
|
breakpoints = g_mp_breakpoints;
|
|
num_breakpoints = g_num_mp_breakpoints;
|
|
break;
|
|
case 'T':
|
|
breakpoints = g_tp_breakpoints;
|
|
num_breakpoints = g_num_tp_breakpoints;
|
|
break;
|
|
|
|
default:
|
|
fputs("Invalid breakpoint type\n", stderr);
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < num_breakpoints; ++i) {
|
|
if (breakpoints[i] == addr) break;
|
|
}
|
|
|
|
if (i == num_breakpoints) return 0; /* not set */
|
|
breakpoints[i] = 0;
|
|
breakpoints[i] = breakpoints[--num_breakpoints];
|
|
|
|
switch(type) {
|
|
case 'B': g_num_bp_breakpoints = num_breakpoints; break;
|
|
case 'M': g_num_mp_breakpoints = num_breakpoints; break;
|
|
case 'T': g_num_tp_breakpoints = num_breakpoints; break;
|
|
}
|
|
|
|
qsort(breakpoints, num_breakpoints, sizeof(word32), addr_cmp);
|
|
fixup_brks();
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void do_help(void) {
|
|
|
|
fputs(
|
|
" * Print registers\n"
|
|
" reg=value Assign register (a,x,y,etc)\n"
|
|
" reset Reset computer\n"
|
|
" quit Exit debugger\n"
|
|
" s Single step\n"
|
|
" g Go\n"
|
|
" bp List PC breakpoints\n"
|
|
" mp List memory breakpoints\n"
|
|
"\n"
|
|
" [address];l List\n"
|
|
" [address];h Hexdump\n"
|
|
" [address];bp Set PC breakpoint\n"
|
|
" [address];bp- Remove PC breakpoint\n"
|
|
" [address];mp Set memory breakpoint\n"
|
|
" [address];mp- Remove memory breakpoint\n"
|
|
" [address]\\temp name Display template\n"
|
|
"\n"
|
|
"\n"
|
|
"Address = 12/3456, 123456, or 1234\n"
|
|
"Register = %%a, %%x, %%y, %%pc, etc\n",
|
|
stdout);
|
|
}
|
|
|
|
|
|
|
|
/* return -1 on error, 0 on success, 1 if debug shell should exit. */
|
|
static int parse_command(const char *cp) {
|
|
|
|
|
|
/* TODO:
|
|
! -> mini assembler mode.
|
|
require 2 successive ^Ds to exit
|
|
*/
|
|
|
|
const char *YYCURSOR = cp;
|
|
const char *YYMARKER = NULL;
|
|
const char *YYCTXMARKER = NULL;
|
|
|
|
int addr = 0;
|
|
int has_bank = 0;
|
|
int has_addr = 0;
|
|
|
|
while (*cp == ' ') ++cp;
|
|
|
|
/*!re2c
|
|
|
|
_ = (ws | eol);
|
|
|
|
* { --YYCURSOR; if (cp == YYCURSOR) goto command; return -1; }
|
|
|
|
"bp" eol { show_bp('B'); return 0; }
|
|
"mp" eol { show_bp('M'); return 0; }
|
|
|
|
"*" eol { show_regs(); return 0; }
|
|
|
|
("q" | "quit" | "exit" | "bye") eol { return 'q'; }
|
|
"reset" eol { do_reset(); return 0; }
|
|
("help" | "?") eol { do_help(); return 0; }
|
|
"brk=" { return do_brk_cop(YYCURSOR, 0x00); }
|
|
"cop=" { return do_brk_cop(YYCURSOR, 0x02); }
|
|
|
|
// register stuff
|
|
|
|
"%pc++" eol {
|
|
/* todo */
|
|
unsigned opcode = get_memory_c(engine.kpc, 0);
|
|
unsigned dtype = disasm_types[opcode];
|
|
unsigned args = dtype >> 8;
|
|
word32 tmp;
|
|
|
|
switch (args) {
|
|
case 4:
|
|
args = engine.psr & 0x20 ? 1 : 2;
|
|
break;
|
|
case 5:
|
|
args = engine.psr & 0x10 ? 1 : 2;
|
|
break;
|
|
}
|
|
tmp = engine.kpc + 1 + args;
|
|
tmp &= 0xffff;
|
|
engine.kpc = (engine.kpc & 0xff0000) | tmp;
|
|
return 0;
|
|
}
|
|
|
|
"%s++" eol {
|
|
unsigned tmp = engine.stack + 1;
|
|
if (engine.psr & 0x0100) {
|
|
tmp &= 0xff;
|
|
tmp |= 0x0100;
|
|
} else {
|
|
tmp &= 0xffff;
|
|
}
|
|
engine.stack = tmp;
|
|
}
|
|
|
|
"%s--" eol {
|
|
unsigned tmp = engine.stack + 1;
|
|
if (engine.psr & 0x0100) {
|
|
tmp &= 0xff;
|
|
tmp |= 0x0100;
|
|
} else {
|
|
tmp &= 0xffff;
|
|
}
|
|
engine.stack = tmp;
|
|
}
|
|
|
|
"%a=" { return do_assign(YYCURSOR, REG_A); }
|
|
"%x=" { return do_assign(YYCURSOR, REG_X); }
|
|
"%y=" { return do_assign(YYCURSOR, REG_Y); }
|
|
"%d=" { return do_assign(YYCURSOR, REG_D); }
|
|
"%e=" { return do_assign(YYCURSOR, REG_E); }
|
|
"5s=" { return do_assign(YYCURSOR, REG_S); }
|
|
"%k=" { return do_assign(YYCURSOR, REG_K); }
|
|
"%b=" { return do_assign(YYCURSOR, REG_B); }
|
|
"%p=" { return do_assign(YYCURSOR, REG_P); }
|
|
"%pc=" { return do_assign(YYCURSOR, REG_PC); }
|
|
"%mx=" { return do_assign(YYCURSOR, REG_MX); }
|
|
|
|
|
|
"%pc" {
|
|
addr = engine.kpc;
|
|
has_addr = 1;
|
|
has_bank = 1;
|
|
goto indir;
|
|
}
|
|
"%a" {
|
|
addr = engine.acc;
|
|
has_addr = 1;
|
|
has_bank = 0;
|
|
goto indir;
|
|
}
|
|
"%x" {
|
|
addr = engine.xreg;
|
|
has_addr = 1;
|
|
has_bank = 0;
|
|
goto indir;
|
|
}
|
|
"%y" {
|
|
addr = engine.yreg;
|
|
has_addr = 1;
|
|
has_bank = 0;
|
|
goto indir;
|
|
}
|
|
"%s" {
|
|
addr = engine.stack;
|
|
has_addr = 1;
|
|
has_bank = 1;
|
|
goto indir;
|
|
}
|
|
"%d" {
|
|
addr = engine.dbank;
|
|
has_addr = 1;
|
|
has_bank = 1;
|
|
goto indir;
|
|
}
|
|
|
|
|
|
|
|
x{6} {
|
|
addr = to_hex(cp, cp + 6);
|
|
has_bank = 1;
|
|
has_addr = 1;
|
|
goto indir;
|
|
}
|
|
x{2} "/" x{4} {
|
|
addr = to_hex(cp, cp + 2) << 16;
|
|
addr |= to_hex(cp + 3, cp + 7);
|
|
has_bank = 1;
|
|
has_addr = 1;
|
|
goto indir;
|
|
}
|
|
x{1,4} {
|
|
addr = to_hex(cp, YYCURSOR);
|
|
has_bank = 0;
|
|
has_addr = 1;
|
|
goto indir;
|
|
}
|
|
*/
|
|
indir:
|
|
cp = YYCURSOR;
|
|
/* only gets here if address specified */
|
|
for(;;) {
|
|
/*!re2c
|
|
"" { break; }
|
|
"^" {
|
|
/* 3-byte indirection */
|
|
if (!has_bank) addr = (g_prev_address & 0xff0000) | addr;
|
|
addr = get_memory24_c(addr, 0);
|
|
has_bank = 1;
|
|
continue;
|
|
}
|
|
"@" {
|
|
/* 2-byte indirection */
|
|
/* 3-byte indirection */
|
|
if (!has_bank) addr = (g_prev_address & 0xff0000) | addr;
|
|
word32 b = addr & 0xff0000;
|
|
addr = get_memory16_c(addr, 0) | b;
|
|
has_bank = 1;
|
|
continue;
|
|
}
|
|
*/
|
|
}
|
|
|
|
command:
|
|
if (!has_bank) {
|
|
addr |= (g_prev_address & 0xff0000);
|
|
}
|
|
if (!has_addr) {
|
|
addr = g_prev_address;
|
|
}
|
|
|
|
cp = YYCURSOR;
|
|
/*!re2c
|
|
* { return -1; }
|
|
|
|
":" {
|
|
g_prev_address = do_mem_assign(addr, YYCURSOR);
|
|
return 0;
|
|
}
|
|
|
|
(";l" | "l") eol {
|
|
g_prev_address = do_list(addr, 20);
|
|
return 0;
|
|
}
|
|
";h" eol {
|
|
g_prev_address = do_hexdump(addr, 20);
|
|
return 0;
|
|
}
|
|
|
|
";s" eol {
|
|
/* print the stack */
|
|
word32 bank;
|
|
if (!has_addr) {
|
|
addr = g_prev_stack_address;
|
|
bank = g_prev_stack_bank;
|
|
}
|
|
if (has_bank) {
|
|
bank = addr & 0xff0000;
|
|
addr &= 0xffff;
|
|
}
|
|
g_prev_stack_address = do_stack(addr,bank);
|
|
return 0;
|
|
}
|
|
|
|
"g" eol {
|
|
/* GO! */
|
|
if (has_addr) {
|
|
engine.kpc = addr;
|
|
}
|
|
g_stepping = 0;
|
|
return 1;
|
|
}
|
|
"s" eol {
|
|
/* step */
|
|
if (has_addr) {
|
|
engine.kpc = addr;
|
|
}
|
|
g_stepping = 1;
|
|
return 1;
|
|
}
|
|
|
|
"n" eol {
|
|
/* next. steps OVER jsr/jsl */
|
|
|
|
if (has_addr) {
|
|
engine.kpc = addr;
|
|
}
|
|
int tmp = next_pc();
|
|
if (tmp < 0) {
|
|
g_stepping = 1;
|
|
} else {
|
|
g_stepping = 0;
|
|
set_bp('T', tmp);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
";bp" [+-]? eol {
|
|
char plus = cp[3];
|
|
if (!has_addr && plus == 0) { show_bp('B'); return 0; }
|
|
if (!has_addr) return -1;
|
|
if (plus == '-') delete_bp('B', addr);
|
|
else set_bp('B', addr);
|
|
return 0;
|
|
}
|
|
|
|
";mp" [+-]? eol {
|
|
char plus = cp[3];
|
|
if (!has_addr && plus == 0) { show_bp('M'); return 0; }
|
|
if (!has_addr) return -1;
|
|
if (plus == '-') delete_bp('M', addr);
|
|
else set_bp('M', addr);
|
|
return 0;
|
|
}
|
|
"\\temp" / (ws|eol) {
|
|
/* apply a gsbug template to memory */
|
|
/* address\temp name */
|
|
while (isspace(*YYCURSOR)) ++YYCURSOR;
|
|
g_prev_address = debug_apply_template(addr, YYCURSOR);
|
|
return 0;
|
|
}
|
|
|
|
*/
|
|
}
|
|
|
|
enum {
|
|
MODE_NORMAL,
|
|
MODE_ASSEMBER
|
|
};
|
|
|
|
static int g_debugger_mode = MODE_NORMAL;
|
|
|
|
|
|
int debug_shell(int code) {
|
|
int c;
|
|
char *cp;
|
|
int control_d_count = 0;
|
|
|
|
fflush(stderr);
|
|
fflush(stdout);
|
|
|
|
if (!g_templates_loaded) {
|
|
char *path;
|
|
g_templates_loaded = 1;
|
|
|
|
path = get_resource_path("GSBug.Templates");
|
|
if (path) {
|
|
debug_load_templates(path);
|
|
free(path);
|
|
}
|
|
path = get_resource_path("NList.Data");
|
|
if (path) {
|
|
debug_load_nifty(path);
|
|
free(path);
|
|
}
|
|
}
|
|
|
|
|
|
/* todo -- only clear IF exit pc == entry pc ? */
|
|
if (code == RET_BP) {
|
|
|
|
/* check for temp. breakpoint */
|
|
if (!delete_bp('T', engine.kpc)) {
|
|
engine.flags |= FLAG_IGNORE_BP;
|
|
printf("Breakpoint hit:\n");
|
|
}
|
|
}
|
|
if (code == RET_MP) {
|
|
engine.flags |= FLAG_IGNORE_MP;
|
|
printf("Memory breakpoint hit\n");
|
|
switch (g_abort_bytes) {
|
|
case 1: g_abort_value &= 0xff; break;
|
|
case 2: g_abort_value &= 0xffff; break;
|
|
case 3: g_abort_value &= 0xffffff; break;
|
|
}
|
|
printf("%06x: %0*x\n", g_abort_address, g_abort_bytes * 2, g_abort_value);
|
|
}
|
|
if (code == RET_BRK || code == RET_COP) {
|
|
/* todo -- should do this at end, verify pc/memory unchanged */
|
|
engine.flags |= FLAG_IGNORE_BRK;
|
|
/* hit a BRK op */
|
|
}
|
|
if (code == RET_HALT) {
|
|
/* halt_printf */
|
|
}
|
|
|
|
|
|
g_prev_stack_address = engine.stack;
|
|
g_prev_stack_bank = engine.kpc & 0xff0000;
|
|
g_prev_address = engine.kpc;
|
|
g_disasm_psr = engine.psr;
|
|
do_list(engine.kpc, 1);
|
|
|
|
for(;;) {
|
|
cp = x_readline("> ");
|
|
if (!cp) {
|
|
if (++control_d_count < 2) {
|
|
fputs("\n", stdout);
|
|
continue;
|
|
}
|
|
return 0;
|
|
}
|
|
control_d_count = 0;
|
|
if (!*cp) continue;
|
|
c = parse_command(cp);
|
|
if (c < 0) printf("error.\n");
|
|
if (c == 'q') return 0;
|
|
if (c == 1) return 1;
|
|
}
|
|
}
|
|
|
|
static void do_sig_intr(int sig) {
|
|
/* todo -- raise() if halt already pending */
|
|
if (halt_sim & 4) {
|
|
abort();
|
|
}
|
|
set_halt(4);
|
|
}
|
|
|
|
/* also called by do_step */
|
|
void do_go() {
|
|
int ret;
|
|
int ok;
|
|
|
|
#ifndef _WIN32
|
|
/* if -g flag, start with debug shell ... */
|
|
if (isatty(STDIN_FILENO)) {
|
|
struct sigaction sa;
|
|
memset(&sa, 0, sizeof(sa));
|
|
sigemptyset(&sa.sa_mask);
|
|
sa.sa_handler = do_sig_intr;
|
|
sigaction(SIGINT, &sa, NULL);
|
|
|
|
} else {
|
|
g_dbg_shell = 0;
|
|
}
|
|
#endif
|
|
|
|
g_config_control_panel = 1;
|
|
if (g_dbg_shell) {
|
|
ok = debug_shell(0);
|
|
if (!ok) return;
|
|
}
|
|
|
|
g_config_control_panel = 0;
|
|
clear_halt();
|
|
|
|
for(;;) {
|
|
|
|
ret = run_prog();
|
|
if (halt_sim & HALT_WANTTOQUIT) return;
|
|
|
|
if (ret || g_stepping) {
|
|
g_config_control_panel = 1;
|
|
ok = debug_shell(ret);
|
|
if (!ok) return;
|
|
g_config_control_panel = 0;
|
|
halt_sim &= ~0x07; /* clear any pending control-Cs, etc. */
|
|
}
|
|
}
|
|
}
|
|
|
|
/* legacy */
|
|
|
|
|
|
|
|
void halt_printf(const char *fmt, ...) {
|
|
va_list args;
|
|
|
|
va_start(args, fmt);
|
|
vprintf(fmt, args);
|
|
va_end(args);
|
|
|
|
set_halt(1);
|
|
}
|
|
|
|
void halt2_printf(const char *fmt, ...) {
|
|
va_list args;
|
|
|
|
va_start(args, fmt);
|
|
vprintf(fmt, args);
|
|
va_end(args);
|
|
|
|
set_halt(2);
|
|
}
|