1/*****************************************************************************/
2/* */
3/* asmcode.c */
4/* */
5/* Assembler output code handling for the cc65 C compiler */
6/* */
7/* */
8/* */
9/* (C) 2000-2009, Ullrich von Bassewitz */
10/* Roemerstrasse 52 */
11/* D-70794 Filderstadt */
12/* EMail: uz@cc65.org */
13/* */
14/* */
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. */
18/* */
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: */
22/* */
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 */
30/* distribution. */
31/* */
32/*****************************************************************************/
33
34
35
36/* common */
37#include "check.h"
38
39/* cc65 */
40#include "asmcode.h"
41#include "codeseg.h"
42#include "dataseg.h"
43#include "segments.h"
44#include "stackptr.h"
45#include "symtab.h"
46
47
48
49/*****************************************************************************/
50/* Code */
51/*****************************************************************************/
52
53
54
55void GetCodePos (CodeMark* M)
56/* Get a marker pointing to the current output position */
57{
58 M->Pos = CS_GetEntryCount (CS->Code);
59 M->SP = StackPtr;
60}
61
62
63
64void RemoveCodeRange (const CodeMark* Start, const CodeMark* End)
65/* Remove all code between two code markers */
66{
67 /* Nothing to do if the range is empty */
68 if (Start->Pos == End->Pos) {
69 return;
70 }
71
72 /* Delete the range */
73 CS_DelCodeRange (CS->Code, Start->Pos, End->Pos-1);
74}
75
76
77
78void RemoveCode (const CodeMark* M)
79/* Remove all code after the given code marker */
80{
81 CS_DelCodeAfter (CS->Code, M->Pos);
82 StackPtr = M->SP;
83}
84
85
86
87void MoveCode (const CodeMark* Start, const CodeMark* End, const CodeMark* Target)
88/* Move the code between Start (inclusive) and End (exclusive) to
89** (before) Target. The code marks aren't updated.
90*/
91{
92 CS_MoveEntries (CS->Code, Start->Pos, End->Pos - Start->Pos, Target->Pos);
93}
94
95
96
97int CodeRangeIsEmpty (const CodeMark* Start, const CodeMark* End)
98/* Return true if the given code range is empty (no code between Start and End) */
99{
100 int Empty;
101 PRECONDITION (Start->Pos <= End->Pos);
102 Empty = (Start->Pos == End->Pos);
103 if (Empty) {
104 /* Safety */
105 CHECK (Start->SP == End->SP);
106 }
107 return Empty;
108}
109
110
111
112void WriteAsmOutput (void)
113/* Write the final assembler output to the output file */
114{
115 SymTable* SymTab;
116 SymEntry* Entry;
117
118 /* Output the global data segment */
119 CHECK (!HaveGlobalCode ());
120 OutputSegments (CS);
121
122 /* Output all global or referenced functions */
123 SymTab = GetGlobalSymTab ();
124 Entry = SymTab->SymHead;
125 while (Entry) {
126 if (SymIsOutputFunc (Entry)) {
127 /* Function which is defined and referenced or extern */
128 OutputSegments (Entry->V.F.Seg);
129 }
130 Entry = Entry->NextSym;
131 }
132}
133