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Support for "virtual operands" of subroutines like this:

Browse Source 
jsr	SomeProc
.byte	$00, $01 ; argument to SomeProc
; return here from SomeProc
bit	$3F
This commit is contained in:
AIDA Shinra 2018-06-10 18:09:11 +09:00
parent b74ab9de89
commit 9283e9ca98
9 changed files with 66 additions and 4 deletions
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12
doc/da65.sgml
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@ -542,6 +542,18 @@ code. The following attributes are recognized:
range, where <tt/label/ is the label name given with the <tt/NAME/
attribute, and <tt/offs/ is the offset within the data.
<tag><tt>VOPERAND</tt></tag>
This optional attribute is followed by a numerical value. It tells the
assembler that subroutine calls to this label follow "virtual operands"
of the given bytes like this:
<tscreen><verb>
JSR LabelWith2BytesOfVoperand
.byte $00, $10 ; virtual operands
; return here
BIT $0F
</verb></tscreen>
</descrip>

30
src/da65/handler.c
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@ -51,6 +51,8 @@
static unsigned short SubroutineVOperandSize[0x10000];
/*****************************************************************************/
/* Helper functions */
/*****************************************************************************/
@ -741,3 +743,31 @@ void OH_JmpAbsoluteXIndirect (const OpcDesc* D)
}
SeparatorLine ();
}
void OH_JsrAbsolute (const OpcDesc* D)
{
unsigned VOperandSize = SubroutineVOperandSize[GetCodeWord(PC+1)];
OH_Absolute (D);
if (VOperandSize > 0) {
unsigned RemainingBytes;
PC += D->Size;
RemainingBytes = GetRemainingBytes();
if (RemainingBytes < VOperandSize) {
VOperandSize = RemainingBytes;
}
if (VOperandSize > 0) {
DataByteLine (VOperandSize); /* FIXME: follow BytesPerLine */
PC += VOperandSize;
}
PC -= D->Size;
}
}
void SetSubroutineVOperand (unsigned Addr, unsigned Size)
{
SubroutineVOperandSize[Addr] = Size;
}

2
src/da65/handler.h
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@ -104,7 +104,9 @@ void OH_Rts (const OpcDesc*);
void OH_JmpAbsolute (const OpcDesc*);
void OH_JmpAbsoluteIndirect (const OpcDesc* D);
void OH_JmpAbsoluteXIndirect (const OpcDesc* D);
void OH_JsrAbsolute (const OpcDesc*);
void SetSubroutineVOperand (unsigned Addr, unsigned Size);
/* End of handler.h */

17
src/da65/infofile.c
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@ -59,6 +59,7 @@
#include "opctable.h"
#include "scanner.h"
#include "segment.h"
#include "handler.h"
@ -380,6 +381,7 @@ static void LabelSection (void)
{ "ADDR", INFOTOK_ADDR },
{ "NAME", INFOTOK_NAME },
{ "SIZE", INFOTOK_SIZE },
{ "VOPERAND", INFOTOK_VOPERAND },
};
/* Locals - initialize to avoid gcc warnings */
@ -387,6 +389,7 @@ static void LabelSection (void)
char* Comment = 0;
long Value = -1;
long Size = -1;
long VOperand = -1;
/* Skip the token */
InfoNextTok ();
@ -448,6 +451,17 @@ static void LabelSection (void)
InfoNextTok ();
break;
case INFOTOK_VOPERAND:
InfoNextTok ();
if (VOperand >= 0) {
InfoError ("VOperand already given");
}
InfoAssureInt ();
InfoRangeCheck (1, 0x10000);
VOperand = InfoIVal;
InfoNextTok ();
break;
default:
Internal ("Unexpected token: %u", InfoTok);
}
@ -484,6 +498,9 @@ static void LabelSection (void)
} else {
AddExtLabelRange ((unsigned) Value, Name, Size);
}
if (VOperand >= 0) {
SetSubroutineVOperand ((unsigned) Value, (unsigned) VOperand);
}
/* Define the comment */
if (Comment) {

2
src/da65/opc6502.c
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@ -79,7 +79,7 @@ const OpcDesc OpcTable_6502[256] = {
{ "ora", 3, flUseLabel|flAbsOverride, OH_AbsoluteX }, /* $1d */
{ "asl", 3, flUseLabel|flAbsOverride, OH_AbsoluteX }, /* $1e */
{ "", 1, flIllegal, OH_Illegal, }, /* $1f */
{ "jsr", 3, flLabel, OH_Absolute }, /* $20 */
{ "jsr", 3, flLabel, OH_JsrAbsolute }, /* $20 */
{ "and", 2, flUseLabel, OH_DirectXIndirect }, /* $21 */
{ "", 1, flIllegal, OH_Illegal, }, /* $22 */
{ "", 1, flIllegal, OH_Illegal, }, /* $23 */

2
src/da65/opc65816.c
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@ -79,7 +79,7 @@ const OpcDesc OpcTable_65816[256] = {
{ "ora", 3, flUseLabel|flAbsOverride, OH_AbsoluteX }, /* $1d */
{ "asl", 3, flUseLabel|flAbsOverride, OH_AbsoluteX }, /* $1e */
{ "ora", 4, flUseLabel, OH_AbsoluteLongX }, /* $1f */
{ "jsr", 3, flLabel, OH_Absolute }, /* $20 */
{ "jsr", 3, flLabel, OH_JsrAbsolute }, /* $20 */
{ "and", 2, flUseLabel, OH_DirectXIndirect }, /* $21 */
{ "jsl", 3, flLabel, OH_AbsoluteLong }, /* $22 */
{ "and", 2, flNone, OH_StackRelative }, /* $23 */

2
src/da65/opc65c02.c
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@ -79,7 +79,7 @@ const OpcDesc OpcTable_65C02[256] = {
{ "ora", 3, flUseLabel|flAbsOverride, OH_AbsoluteX }, /* $1d */
{ "asl", 3, flUseLabel|flAbsOverride, OH_AbsoluteX }, /* $1e */
{ "bbr1", 3, flUseLabel, OH_BitBranch }, /* $1f */
{ "jsr", 3, flLabel, OH_Absolute }, /* $20 */
{ "jsr", 3, flLabel, OH_JsrAbsolute }, /* $20 */
{ "and", 2, flUseLabel, OH_DirectXIndirect }, /* $21 */
{ "", 1, flIllegal, OH_Illegal, }, /* $22 */
{ "", 1, flIllegal, OH_Illegal, }, /* $23 */

2
src/da65/opc65sc02.c
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@ -79,7 +79,7 @@ const OpcDesc OpcTable_65SC02[256] = {
{ "ora", 3, flUseLabel|flAbsOverride, OH_AbsoluteX }, /* $1d */
{ "asl", 3, flUseLabel|flAbsOverride, OH_AbsoluteX }, /* $1e */
{ "", 1, flIllegal, OH_Illegal, }, /* $1f */
{ "jsr", 3, flLabel, OH_Absolute }, /* $20 */
{ "jsr", 3, flLabel, OH_JsrAbsolute }, /* $20 */
{ "and", 2, flUseLabel, OH_DirectXIndirect }, /* $21 */
{ "", 1, flIllegal, OH_Illegal, }, /* $22 */
{ "", 1, flIllegal, OH_Illegal, }, /* $23 */

1
src/da65/scanner.h
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@ -105,6 +105,7 @@ typedef enum token_t {
INFOTOK_COMMENT,
INFOTOK_ADDR,
INFOTOK_SIZE,
INFOTOK_VOPERAND,
/* ASMINC section */
INFOTOK_FILE,