1 /*****************************************************************************/
5 /* Objectcode management for the ca65 macroassembler */
9 /* (C) 1998-2001 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
12 /* EMail: uz@cc65.org */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
49 /*****************************************************************************/
51 /*****************************************************************************/
55 /* Are we in absolute mode or in relocatable mode? */
58 /* Definitions for predefined segments */
59 extern SegDef NullSegDef;
60 extern SegDef ZeropageSegDef;
61 extern SegDef DataSegDef;
62 extern SegDef BssSegDef;
63 extern SegDef RODataSegDef;
64 extern SegDef CodeSegDef;
68 /*****************************************************************************/
69 /* Segment management */
70 /*****************************************************************************/
74 void UseSeg (const SegDef* D);
75 /* Use the given segment */
77 const SegDef* GetCurrentSeg (void);
78 /* Get a pointer to the segment defininition of the current segment */
80 unsigned GetSegNum (void);
81 /* Get the number of the current segment */
83 void SegAlign (unsigned Power, int Val);
84 /* Align the PC segment to 2^Power. If Val is -1, emit fill fragments (the
85 * actual fill value will be determined by the linker), otherwise use the
90 /* Return true if the current segment is a zeropage segment */
93 /* Return true if the current segment is a far segment */
95 unsigned GetSegType (unsigned SegNum);
96 /* Return the type of the segment with the given number */
98 unsigned long GetPC (void);
99 /* Get the program counter of the current segment */
101 void SetAbsPC (unsigned long AbsPC);
102 /* Set the program counter in absolute mode */
104 void SegCheck (void);
105 /* Check the segments for range and other errors */
108 /* Dump the contents of all segments */
110 void WriteSegments (void);
111 /* Write the segment data to the object file */
115 /*****************************************************************************/
117 /*****************************************************************************/
121 void Emit0 (unsigned char OPC);
122 /* Emit an instruction with a zero sized operand */
124 void Emit1 (unsigned char OPC, ExprNode* Value);
125 /* Emit an instruction with an one byte argument */
127 void Emit2 (unsigned char OPC, ExprNode* Value);
128 /* Emit an instruction with a two byte argument */
130 void Emit3 (unsigned char OPC, ExprNode* Expr);
131 /* Emit an instruction with a three byte argument */
133 void Emit3b (unsigned char OPC, ExprNode* Expr, ExprNode* Bank);
134 /* Emit an instruction with a three byte argument and separate bank */
136 void EmitPCRel (unsigned char OPC, ExprNode* Expr, unsigned Size);
137 /* Emit an opcode with a PC relative argument of one or two bytes */
139 void EmitData (const unsigned char* Data, unsigned Size);
140 /* Emit data into the current segment */
142 void EmitByte (ExprNode* Expr);
145 void EmitWord (ExprNode* Expr);
148 void EmitFarAddr (ExprNode* Expr);
149 /* Emit a 24 bit expression */
151 void EmitDWord (ExprNode* Expr);
154 void EmitFill (unsigned long Count);
155 /* Emit Count fill bytes */
159 /* End of objcode.h */