mirror of https://github.com/cc65/cc65.git
861 lines
20 KiB
C
861 lines
20 KiB
C
/*****************************************************************************/
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/* */
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/* handler.c */
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/* */
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/* Opcode handler functions for the disassembler */
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/* */
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/* */
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/* */
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/* (C) 2000-2011, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <stdarg.h>
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/* common */
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#include "xmalloc.h"
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#include "xsprintf.h"
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/* da65 */
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#include "attrtab.h"
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#include "code.h"
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#include "error.h"
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#include "global.h"
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#include "handler.h"
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#include "labels.h"
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#include "opctable.h"
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#include "output.h"
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static unsigned short SubroutineParamSize[0x10000];
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/*****************************************************************************/
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/* Helper functions */
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/*****************************************************************************/
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static void Mnemonic (const char* M)
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/* Indent and output a mnemonic */
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{
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Indent (MCol);
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Output ("%s", M);
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}
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static void OneLine (const OpcDesc* D, const char* Arg, ...) attribute ((format(printf, 2, 3)));
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static void OneLine (const OpcDesc* D, const char* Arg, ...)
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/* Output one line with the given mnemonic and argument */
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{
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char Buf [256];
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va_list ap;
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/* Mnemonic */
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Mnemonic (D->Mnemo);
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/* Argument */
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va_start (ap, Arg);
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xvsprintf (Buf, sizeof (Buf), Arg, ap);
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va_end (ap);
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Indent (ACol);
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Output ("%s", Buf);
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/* Add the code stuff as comment */
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LineComment (PC, D->Size);
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/* End the line */
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LineFeed ();
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}
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static const char* GetAbsOverride (unsigned Flags, unsigned Addr)
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/* If the instruction requires an abs override modifier, return the necessary
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** string, otherwise return the empty string.
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*/
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{
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if ((Flags & flFarOverride) != 0 && Addr < 0x10000) {
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return "f:";
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} else if ((Flags & flAbsOverride) != 0 && Addr < 0x100) {
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return "a:";
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} else {
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return "";
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}
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}
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static const char* GetAddrArg (unsigned Flags, unsigned Addr)
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/* Return an address argument - a label if we have one, or the address itself */
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{
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const char* Label = 0;
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if (Flags & flUseLabel) {
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Label = GetLabel (Addr, PC);
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}
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if (Label) {
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return Label;
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} else {
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static char Buf [32];
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if (Addr < 0x100) {
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xsprintf (Buf, sizeof (Buf), "$%02X", Addr);
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} else if (Addr < 0x10000) {
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xsprintf (Buf, sizeof (Buf), "$%04X", Addr);
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} else {
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xsprintf (Buf, sizeof (Buf), "$%06X", Addr);
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}
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return Buf;
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}
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}
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static void GenerateLabel (unsigned Flags, unsigned Addr)
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/* Generate a label in pass one if requested */
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{
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/* Generate labels in pass #1, and only if we don't have a label already */
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if (Pass == 1 && !HaveLabel (Addr) &&
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/* Check if we must create a label */
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((Flags & flGenLabel) != 0 ||
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((Flags & flUseLabel) != 0 && Addr >= CodeStart && Addr <= CodeEnd))) {
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/* As a special case, handle ranges with tables or similar. Within
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** such a range with a granularity > 1, do only generate dependent
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** labels for all addresses but the first one. Be sure to generate
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** a label for the start of the range, however.
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*/
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attr_t Style = GetStyleAttr (Addr);
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unsigned Granularity = GetGranularity (Style);
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if (Granularity == 1) {
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/* Just add the label */
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AddIntLabel (Addr);
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} else {
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/* THIS CODE IS A MESS AND WILL FAIL ON SEVERAL CONDITIONS! ### */
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/* Search for the start of the range or the last non dependent
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** label in the range.
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*/
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unsigned Offs;
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attr_t LabelAttr;
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unsigned LabelAddr = Addr;
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while (LabelAddr > CodeStart) {
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if (Style != GetStyleAttr (LabelAddr-1)) {
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/* End of range reached */
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break;
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}
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--LabelAddr;
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LabelAttr = GetLabelAttr (LabelAddr);
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if ((LabelAttr & (atIntLabel|atExtLabel)) != 0) {
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/* The address has an internal or external label */
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break;
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}
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}
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/* If the proposed label address doesn't have a label, define one */
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if ((GetLabelAttr (LabelAddr) & (atIntLabel|atExtLabel)) == 0) {
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AddIntLabel (LabelAddr);
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}
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/* Create the label */
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Offs = Addr - LabelAddr;
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if (Offs == 0) {
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AddIntLabel (Addr);
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} else {
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AddDepLabel (Addr, atIntLabel, GetLabelName (LabelAddr), Offs);
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}
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}
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}
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}
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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void OH_Illegal (const OpcDesc* D attribute ((unused)))
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{
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DataByteLine (1);
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}
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void OH_Accumulator (const OpcDesc* D)
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{
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OneLine (D, "a");
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}
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void OH_Implicit (const OpcDesc* D)
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{
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Mnemonic (D->Mnemo);
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LineComment (PC, D->Size);
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LineFeed ();
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}
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void OH_Immediate (const OpcDesc* D)
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{
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OneLine (D, "#$%02X", GetCodeByte (PC+1));
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}
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void OH_Immediate65816M (const OpcDesc* D)
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{
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if (GetAttr (PC) & atMem16) {
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OneLine (D, "#$%04X", GetCodeWord (PC+1));
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} else {
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OneLine (D, "#$%02X", GetCodeByte (PC+1));
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}
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}
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void OH_Immediate65816X (const OpcDesc* D)
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{
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if (GetAttr (PC) & atIdx16) {
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OneLine (D, "#$%04X", GetCodeWord (PC+1));
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} else {
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OneLine (D, "#$%02X", GetCodeByte (PC+1));
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}
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}
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void OH_ImmediateWord (const OpcDesc* D)
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{
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OneLine (D, "#$%04X", GetCodeWord (PC+1));
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}
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void OH_Direct (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "%s", GetAddrArg (D->Flags, Addr));
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}
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void OH_DirectX (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "%s,x", GetAddrArg (D->Flags, Addr));
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}
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void OH_DirectY (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "%s,y", GetAddrArg (D->Flags, Addr));
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}
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void OH_Absolute (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeWord (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "%s%s", GetAbsOverride (D->Flags, Addr), GetAddrArg (D->Flags, Addr));
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}
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void OH_AbsoluteX (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeWord (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "%s%s,x", GetAbsOverride (D->Flags, Addr), GetAddrArg (D->Flags, Addr));
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}
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void OH_AbsoluteY (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeWord (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "%s%s,y", GetAbsOverride (D->Flags, Addr), GetAddrArg (D->Flags, Addr));
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}
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void OH_AbsoluteLong (const OpcDesc* D attribute ((unused)))
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{
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/* Get the operand */
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unsigned Addr = GetCodeLongAddr (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "%s%s", GetAbsOverride (D->Flags, Addr), GetAddrArg (D->Flags, Addr));
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}
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void OH_AbsoluteLongX (const OpcDesc* D attribute ((unused)))
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{
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/* Get the operand */
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unsigned Addr = GetCodeLongAddr (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "%s%s,x", GetAbsOverride (D->Flags, Addr), GetAddrArg (D->Flags, Addr));
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}
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void OH_Relative (const OpcDesc* D)
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{
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/* Get the operand */
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signed char Offs = GetCodeByte (PC+1);
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/* Calculate the target address */
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unsigned Addr = (((int) PC+2) + Offs) & 0xFFFF;
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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if (HaveLabel(Addr)) {
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OneLine (D, "%s", GetAddrArg (D->Flags, Addr));
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} else {
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/* No label -- make a relative address expression */
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OneLine (D, "* + (%d)", (int) Offs + 2);
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}
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}
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void OH_RelativeLong (const OpcDesc* D attribute ((unused)))
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{
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/* Get the operand */
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signed short Offs = GetCodeWord (PC+1);
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/* Calculate the target address */
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unsigned Addr = (((int) PC+3) + Offs) & 0xFFFF;
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "%s", GetAddrArg (D->Flags, Addr));
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}
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void OH_RelativeLong4510 (const OpcDesc* D attribute ((unused)))
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{
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/* Get the operand */
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signed short Offs = GetCodeWord (PC+1);
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/* Calculate the target address */
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unsigned Addr = (((int) PC+2) + Offs) & 0xFFFF;
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "%s", GetAddrArg (D->Flags, Addr));
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}
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void OH_DirectIndirect (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "(%s)", GetAddrArg (D->Flags, Addr));
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}
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void OH_DirectIndirectY (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "(%s),y", GetAddrArg (D->Flags, Addr));
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}
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void OH_DirectIndirectZ (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "(%s),z", GetAddrArg (D->Flags, Addr));
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}
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void OH_DirectXIndirect (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "(%s,x)", GetAddrArg (D->Flags, Addr));
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}
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void OH_AbsoluteIndirect (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeWord (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "(%s)", GetAddrArg (D->Flags, Addr));
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}
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void OH_BitBranch (const OpcDesc* D)
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{
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char* BranchLabel;
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/* Get the operands */
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unsigned char TestAddr = GetCodeByte (PC+1);
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signed char BranchOffs = GetCodeByte (PC+2);
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/* Calculate the target address for the branch */
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unsigned BranchAddr = (((int) PC+3) + BranchOffs) & 0xFFFF;
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/* Generate labels in pass 1. The bit branch codes are special in that
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** they don't really match the remainder of the 6502 instruction set (they
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** are a Rockwell addon), so we must pass additional flags as direct
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** value to the second GenerateLabel call.
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*/
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GenerateLabel (D->Flags, TestAddr);
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GenerateLabel (flLabel, BranchAddr);
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/* Make a copy of an operand, so that
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** the other operand can't overwrite it.
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** [GetAddrArg() uses a statically-stored buffer.]
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*/
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BranchLabel = xstrdup (GetAddrArg (flLabel, BranchAddr));
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/* Output the line */
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OneLine (D, "%s,%s", GetAddrArg (D->Flags, TestAddr), BranchLabel);
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xfree (BranchLabel);
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}
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void OH_ImmediateDirect (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+2);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "#$%02X,%s", GetCodeByte (PC+1), GetAddrArg (D->Flags, Addr));
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}
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void OH_ImmediateDirectX (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+2);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "#$%02X,%s,x", GetCodeByte (PC+1), GetAddrArg (D->Flags, Addr));
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}
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void OH_ImmediateAbsolute (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeWord (PC+2);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "#$%02X,%s%s", GetCodeByte (PC+1), GetAbsOverride (D->Flags, Addr), GetAddrArg (D->Flags, Addr));
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}
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void OH_ImmediateAbsoluteX (const OpcDesc* D)
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{
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/* Get the operand */
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unsigned Addr = GetCodeWord (PC+2);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "#$%02X,%s%s,x", GetCodeByte (PC+1), GetAbsOverride (D->Flags, Addr), GetAddrArg (D->Flags, Addr));
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}
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void OH_StackRelative (const OpcDesc* D attribute ((unused)))
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{
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/* Output the line */
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OneLine (D, "$%02X,s", GetCodeByte (PC+1));
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}
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void OH_DirectIndirectLongX (const OpcDesc* D attribute ((unused)))
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{
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Error ("Not implemented %s", __FUNCTION__);
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}
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void OH_StackRelativeIndirectY (const OpcDesc* D attribute ((unused)))
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{
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/* Output the line */
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OneLine (D, "($%02X,s),y", GetCodeByte (PC+1));
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}
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void OH_StackRelativeIndirectY4510 (const OpcDesc* D attribute ((unused)))
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{
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/* Output the line */
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OneLine (D, "($%02X,sp),y", GetCodeByte (PC+1));
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}
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void OH_DirectIndirectLong (const OpcDesc* D attribute ((unused)))
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "[%s]", GetAddrArg (D->Flags, Addr));
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}
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void OH_DirectIndirectLongY (const OpcDesc* D attribute ((unused)))
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{
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/* Get the operand */
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unsigned Addr = GetCodeByte (PC+1);
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/* Generate a label in pass 1 */
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GenerateLabel (D->Flags, Addr);
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/* Output the line */
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OneLine (D, "[%s],y", GetAddrArg (D->Flags, Addr));
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}
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void OH_BlockMove (const OpcDesc* D)
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{
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char* DstLabel;
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/* Get source operand */
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unsigned Src = GetCodeWord (PC+1);
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/* Get destination operand */
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unsigned Dst = GetCodeWord (PC+3);
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|
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/* Generate a label in pass 1 */
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|
GenerateLabel (D->Flags, Src);
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|
GenerateLabel (D->Flags, Dst);
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|
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/* Make a copy of an operand, so that
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|
** the other operand can't overwrite it.
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|
** [GetAddrArg() uses a statically-stored buffer.]
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|
*/
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DstLabel = xstrdup (GetAddrArg (D->Flags, Dst));
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|
|
|
/* Output the line */
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|
OneLine (D, "%s%s,%s%s,$%04X",
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|
GetAbsOverride (D->Flags, Src), GetAddrArg (D->Flags, Src),
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GetAbsOverride (D->Flags, Dst), DstLabel,
|
|
GetCodeWord (PC+5));
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|
|
xfree (DstLabel);
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}
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void OH_BlockMove65816 (const OpcDesc* D)
|
|
{
|
|
/* Get source operand */
|
|
unsigned Src = GetCodeByte (PC+2);
|
|
/* Get destination operand */
|
|
unsigned Dst = GetCodeByte (PC+1);
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|
|
|
/* Output the line */
|
|
OneLine (D, "#$%02X, #$%02X", Src, Dst);
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}
|
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void OH_AbsoluteXIndirect (const OpcDesc* D attribute ((unused)))
|
|
{
|
|
/* Get the operand */
|
|
unsigned Addr = GetCodeWord (PC+1);
|
|
|
|
/* Generate a label in pass 1 */
|
|
GenerateLabel (D->Flags, Addr);
|
|
|
|
/* Output the line */
|
|
OneLine (D, "(%s,x)", GetAddrArg (D->Flags, Addr));
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}
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void OH_DirectImmediate (const OpcDesc* D)
|
|
{
|
|
/* Get the operand */
|
|
unsigned Addr = GetCodeByte (PC+1);
|
|
|
|
/* Generate a label in pass 1 */
|
|
GenerateLabel (D->Flags, Addr);
|
|
|
|
/* Output the line */
|
|
OneLine (D, "%s, #$%02X", GetAddrArg (D->Flags, Addr), GetCodeByte (PC+2));
|
|
}
|
|
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|
|
void OH_ZeroPageBit (const OpcDesc* D)
|
|
{
|
|
unsigned Bit = GetCodeByte (PC) >> 5;
|
|
unsigned Addr = GetCodeByte (PC+1);
|
|
|
|
/* Generate a label in pass 1 */
|
|
GenerateLabel (D->Flags, Addr);
|
|
|
|
/* Output the line */
|
|
OneLine (D, "%01X,%s", Bit, GetAddrArg (D->Flags, Addr));
|
|
}
|
|
|
|
|
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|
|
void OH_AccumulatorBit (const OpcDesc* D)
|
|
{
|
|
unsigned Bit = GetCodeByte (PC) >> 5;
|
|
|
|
/* Output the line */
|
|
OneLine (D, "%01X,a", Bit);
|
|
}
|
|
|
|
|
|
|
|
void OH_AccumulatorBitBranch (const OpcDesc* D)
|
|
{
|
|
unsigned Bit = GetCodeByte (PC) >> 5;
|
|
signed char BranchOffs = GetCodeByte (PC+1);
|
|
|
|
/* Calculate the target address for the branch */
|
|
unsigned BranchAddr = (((int) PC+3) + BranchOffs) & 0xFFFF;
|
|
|
|
/* Generate labels in pass 1 */
|
|
GenerateLabel (flLabel, BranchAddr);
|
|
|
|
/* Output the line */
|
|
OneLine (D, "%01X,a,%s", Bit, GetAddrArg (flLabel, BranchAddr));
|
|
}
|
|
|
|
|
|
|
|
void OH_JmpDirectIndirect (const OpcDesc* D)
|
|
{
|
|
OH_DirectIndirect (D);
|
|
if (NewlineAfterJMP) {
|
|
LineFeed ();
|
|
}
|
|
SeparatorLine ();
|
|
}
|
|
|
|
|
|
|
|
void OH_SpecialPage (const OpcDesc* D)
|
|
{
|
|
/* Get the operand */
|
|
unsigned Addr = 0xFF00 + GetCodeByte (PC+1);
|
|
|
|
/* Generate a label in pass 1 */
|
|
GenerateLabel (D->Flags, Addr);
|
|
|
|
/* OneLine (D, "$FF%02X", (CodeByte (PC+1)); */
|
|
OneLine (D, "%s", GetAddrArg (D->Flags, Addr));
|
|
}
|
|
|
|
|
|
|
|
void OH_Rts (const OpcDesc* D)
|
|
{
|
|
OH_Implicit (D);
|
|
if (NewlineAfterRTS) {
|
|
LineFeed ();
|
|
}
|
|
SeparatorLine();
|
|
}
|
|
|
|
|
|
|
|
void OH_JmpAbsolute (const OpcDesc* D)
|
|
{
|
|
OH_Absolute (D);
|
|
if (NewlineAfterJMP) {
|
|
LineFeed ();
|
|
}
|
|
SeparatorLine ();
|
|
}
|
|
|
|
|
|
|
|
void OH_JmpAbsoluteIndirect (const OpcDesc* D)
|
|
{
|
|
OH_AbsoluteIndirect (D);
|
|
if (NewlineAfterJMP) {
|
|
LineFeed ();
|
|
}
|
|
SeparatorLine ();
|
|
}
|
|
|
|
|
|
|
|
void OH_JmpAbsoluteXIndirect (const OpcDesc* D)
|
|
{
|
|
OH_AbsoluteXIndirect (D);
|
|
if (NewlineAfterJMP) {
|
|
LineFeed ();
|
|
}
|
|
SeparatorLine ();
|
|
}
|
|
|
|
|
|
|
|
void OH_JsrAbsolute (const OpcDesc* D)
|
|
{
|
|
unsigned ParamSize = SubroutineParamSize[GetCodeWord (PC+1)];
|
|
OH_Absolute (D);
|
|
if (ParamSize > 0) {
|
|
unsigned RemainingBytes;
|
|
unsigned BytesLeft;
|
|
PC += D->Size;
|
|
RemainingBytes = GetRemainingBytes ();
|
|
if (RemainingBytes < ParamSize) {
|
|
ParamSize = RemainingBytes;
|
|
}
|
|
BytesLeft = ParamSize;
|
|
while (BytesLeft > 0) {
|
|
unsigned Chunk = (BytesLeft > BytesPerLine) ? BytesPerLine : BytesLeft;
|
|
DataByteLine (Chunk);
|
|
BytesLeft -= Chunk;
|
|
PC += Chunk;
|
|
}
|
|
PC -= D->Size;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void SetSubroutineParamSize (unsigned Addr, unsigned Size)
|
|
{
|
|
SubroutineParamSize[Addr] = Size;
|
|
}
|