// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** x86log.c x86/x64 code logging helpers. ***************************************************************************/ #include #include #include "emu.h" #include "x86log.h" /*************************************************************************** FUNCTION PROTOTYPES ***************************************************************************/ static void reset_log(x86log_context *log) noexcept; extern int i386_dasm_one_ex(char *buffer, UINT64 eip, const UINT8 *oprom, int mode); /*************************************************************************** EXTERNAL INTERFACES ***************************************************************************/ /*------------------------------------------------- x86log_create_context - create a new context -------------------------------------------------*/ x86log_context *x86log_create_context(const char *filename) { x86log_context *log; /* allocate the log */ log = global_alloc_clear(); /* allocate the filename */ log->filename.assign(filename); /* reset things */ reset_log(log); return log; } /*------------------------------------------------- x86log_free_context - release a context -------------------------------------------------*/ void x86log_free_context(x86log_context *log) noexcept { /* close any open files */ if (log->file != nullptr) fclose(log->file); /* free the structure */ global_free(log); } /*------------------------------------------------- x86log_mark_as_data - mark a given range as data for logging purposes -------------------------------------------------*/ void x86log_mark_as_data(x86log_context *log, x86code *base, x86code *end, int size) noexcept { data_range_t *data; assert(log->data_range_count < MAX_DATA_RANGES); assert(end >= base); assert(size == 1 || size == 2 || size == 4 || size == 8); /* we assume data ranges are registered in order; enforce this */ assert(log->data_range_count == 0 || base > log->data_range[log->data_range_count - 1].end); /* if we exceed the maxima, skip it */ if (log->data_range_count >= MAX_DATA_RANGES) return; /* fill in the new range */ data = &log->data_range[log->data_range_count++]; data->base = base; data->end = end; data->size = size; } /*------------------------------------------------- x86log_disasm_code_range - disassemble a range of code and reset accumulated information -------------------------------------------------*/ void x86log_disasm_code_range(x86log_context *log, const char *label, x86code *start, x86code *stop) { const log_comment *lastcomment = &log->comment_list[log->comment_count]; const log_comment *curcomment = &log->comment_list[0]; const data_range_t *lastdata = &log->data_range[log->data_range_count]; const data_range_t *curdata = &log->data_range[0]; x86code *cur = start; /* print the optional label */ if (label != nullptr) x86log_printf(log, "\n%s\n", label); /* loop from the start until the cache top */ while (cur < stop) { char buffer[100]; int bytes; /* skip past any past data ranges */ while (curdata < lastdata && cur > curdata->end) curdata++; /* skip past any past comments */ while (curcomment < lastcomment && cur > curcomment->base) curcomment++; /* if we're in a data range, output the next chunk and continue */ if (cur >= curdata->base && cur <= curdata->end) { bytes = curdata->size; switch (curdata->size) { default: case 1: sprintf(buffer, "db %02X", *cur); break; case 2: sprintf(buffer, "dw %04X", *(UINT16 *)cur); break; case 4: sprintf(buffer, "dd %08X", *(UINT32 *)cur); break; case 8: sprintf(buffer, "dq %08X%08X", ((UINT32 *)cur)[1], ((UINT32 *)cur)[0]); break; } } /* if we're not in the data range, skip filler opcodes */ else if (*cur == 0xcc) { cur++; continue; } /* otherwise, do a disassembly of the current instruction */ else { bytes = i386_dasm_one_ex(buffer, (FPTR)cur, cur, sizeof(void *) * 8) & DASMFLAG_LENGTHMASK; } /* if we have a matching comment, output it */ if (curcomment < lastcomment && cur == curcomment->base) { /* if we have additional matching comments at the same address, output them first */ for ( ; curcomment + 1 < lastcomment && cur == curcomment[1].base; curcomment++) x86log_printf(log, "%p: %-50s; %s\n", cur, "", curcomment->string); x86log_printf(log, "%p: %-50s; %s\n", cur, buffer, curcomment->string); } /* if we don't, just print the disassembly and move on */ else x86log_printf(log, "%p: %s\n", cur, buffer); /* advance past this instruction */ cur += bytes; } /* reset our state */ reset_log(log); } /*************************************************************************** LOCAL FUNCTIONS ***************************************************************************/ /*------------------------------------------------- reset_log - reset the state of the log -------------------------------------------------*/ static void reset_log(x86log_context *log) noexcept { log->data_range_count = 0; log->comment_count = 0; log->comment_pool_next = log->comment_pool; }