mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 15:27:46 -04:00
118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
/*
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* DRC host disassembler interface for MIPS/ARM32 for use without binutils
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* (C) kub, 2018,2019
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#if defined __mips__
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#include "dismips.c"
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#define disasm dismips
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#elif defined __arm__
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#include "disarm.c"
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#define disasm disarm
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#endif
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/* symbols */
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typedef struct { const char *name; void *value; } asymbol;
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static asymbol **symbols;
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static long symcount, symstorage = 8;
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static const char *lookup_name(void *addr)
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{
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asymbol **sptr = symbols;
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int i;
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for (i = 0; i < symcount; i++) {
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asymbol *sym = *sptr++;
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if (addr == sym->value)
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return sym->name;
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}
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return NULL;
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}
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#ifdef disasm
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void host_dasm(void *addr, int len)
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{
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void *end = (char *)addr + len;
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const char *name;
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char buf[64];
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unsigned long insn, symaddr;
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while (addr < end) {
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name = lookup_name(addr);
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if (name != NULL)
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printf("%s:\n", name);
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insn = *(unsigned long *)addr;
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printf(" %08lx %08lx ", (long)addr, insn);
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if(disasm((uintptr_t)addr, insn, buf, sizeof(buf), &symaddr))
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{
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if (symaddr)
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name = lookup_name((void *)symaddr);
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if (symaddr && name)
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printf("%s <%s>\n", buf, name);
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else if (symaddr && !name)
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printf("%s <unknown>\n", buf);
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else
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printf("%s\n", buf);
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} else
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printf("unknown (0x%08lx)\n", insn);
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addr = (char *)addr + sizeof(long);
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}
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}
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#else
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void host_dasm(void *addr, int len)
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{
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char *end = (char *)addr + len;
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char buf[64];
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char *p = addr;
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int i = 0, o = 0;
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o = snprintf(buf, sizeof(buf), "%p: ", p);
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while (p < end) {
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o += snprintf(buf+o, sizeof(buf)-o, "%02x ", *p++);
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if (++i >= 16) {
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buf[o] = '\0';
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printf("%s\n", buf);
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o = snprintf(buf, sizeof(buf), "%p: ", p);
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i = 0;
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}
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}
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if (i) {
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buf[o] = '\0';
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printf("%s\n", buf);
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}
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}
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#endif
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void host_dasm_new_symbol_(void *addr, const char *name)
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{
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asymbol *sym, **tmp;
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if (symbols == NULL)
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symbols = malloc(symstorage);
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if (symstorage <= symcount * sizeof(symbols[0])) {
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tmp = realloc(symbols, symstorage * 2);
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if (tmp == NULL)
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return;
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symstorage *= 2;
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symbols = tmp;
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}
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symbols[symcount] = calloc(sizeof(*symbols[0]), 1);
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if (symbols[symcount] == NULL)
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return;
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// a HACK (should use correct section), but ohwell
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sym = symbols[symcount];
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sym->value = addr;
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sym->name = name;
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symcount++;
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}
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