1 /*****************************************************************************/
5 /* Segments for the ca65 macroassembler */
9 /* (C) 1998-2007 Ullrich von Bassewitz */
10 /* Roemerstrasse 52 */
11 /* D-70794 Filderstadt */
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 /*****************************************************************************/
51 /*****************************************************************************/
53 /*****************************************************************************/
57 /* Segment definition */
58 typedef struct Segment Segment;
60 Segment* List; /* List of all segments */
61 Fragment* Root; /* Root of fragment list */
62 Fragment* Last; /* Pointer to last fragment */
63 unsigned long FragCount; /* Number of fragments */
64 unsigned Num; /* Segment number */
65 unsigned Align; /* Segment alignment */
66 int RelocMode; /* Relocatable mode if OrgPerSeg */
67 unsigned long PC; /* PC if in relocatable mode */
68 unsigned long AbsPC; /* PC if in local absolute mode */
69 /* (OrgPerSeg is true) */
70 SegDef* Def; /* Segment definition (name and type) */
73 /* Definitions for predefined segments */
74 extern SegDef NullSegDef;
75 extern SegDef ZeropageSegDef;
76 extern SegDef DataSegDef;
77 extern SegDef BssSegDef;
78 extern SegDef RODataSegDef;
79 extern SegDef CodeSegDef;
81 /* List of all segments */
82 extern Segment* SegmentList;
84 /* Currently active segment */
85 extern Segment* ActiveSeg;
89 /*****************************************************************************/
91 /*****************************************************************************/
95 Fragment* GenFragment (unsigned char Type, unsigned short Len);
96 /* Generate a new fragment, add it to the current segment and return it. */
98 void UseSeg (const SegDef* D);
99 /* Use the given segment */
101 #if defined(HAVE_INLINE)
102 INLINE const SegDef* GetCurrentSegDef (void)
103 /* Get a pointer to the segment defininition of the current segment */
105 return ActiveSeg->Def;
108 # define GetCurrentSegDef() (ActiveSeg->Def)
111 #if defined(HAVE_INLINE)
112 INLINE unsigned GetCurrentSegNum (void)
113 /* Get the number of the current segment */
115 return ActiveSeg->Num;
118 # define GetCurrentSegNum() (ActiveSeg->Num)
121 #if defined(HAVE_INLINE)
122 INLINE unsigned char GetCurrentSegAddrSize (void)
123 /* Get the address size of the current segment */
125 return ActiveSeg->Def->AddrSize;
128 # define GetCurrentSegAddrSize() (ActiveSeg->Def->AddrSize)
131 void SegAlign (unsigned Power, int Val);
132 /* Align the PC segment to 2^Power. If Val is -1, emit fill fragments (the
133 * actual fill value will be determined by the linker), otherwise use the
137 unsigned char GetSegAddrSize (unsigned SegNum);
138 /* Return the address size of the segment with the given number */
140 unsigned long GetPC (void);
141 /* Get the program counter of the current segment */
143 int GetRelocMode (void);
144 /* Return true if we're currently in relocatable mode */
146 void EnterAbsoluteMode (unsigned long AbsPC);
147 /* Enter absolute (non relocatable mode). Depending on the OrgPerSeg flag,
148 * this will either switch the mode globally or for the current segment.
151 void EnterRelocMode (void);
152 /* Enter relocatable mode. Depending on the OrgPerSeg flag, this will either
153 * switch the mode globally or for the current segment.
156 void SegCheck (void);
157 /* Check the segments for range and other errors */
160 /* Dump the contents of all segments */
162 void InitSegments (void);
163 /* Initialize segments */
165 void WriteSegments (void);
166 /* Write the segment data to the object file */
170 /* End of segment.h */