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 | |
55 | void 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 | |
64 | void 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 | |
78 | void 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 | |
87 | void 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 | |
97 | int 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 | |
112 | void 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 | |