2 // RMAC - Reboot's Macro Assembler for all Atari computers
3 // SECT.H - Code Generation, Fixups and Section Management
4 // Copyright (C) 199x Landon Dyer, 2011-2018 Reboot and Friends
5 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
6 // Source utilized with the kind permission of Landon Dyer
14 // Macros to deposit code in the current section (in Big Endian)
15 #define D_byte(b) {chcheck(1);*chptr++=(uint8_t)(b); sloc++; ch_size++; \
16 if(orgactive) orgaddr++;}
17 #define D_word(w) {chcheck(2);*chptr++=(uint8_t)((w)>>8); \
18 *chptr++=(uint8_t)(w); \
19 sloc += 2; ch_size += 2; if(orgactive) orgaddr += 2;}
20 #define D_long(lw) {chcheck(4);*chptr++=(uint8_t)((lw)>>24); \
21 *chptr++=(uint8_t)((lw)>>16);\
22 *chptr++=(uint8_t)((lw)>>8); \
23 *chptr++=(uint8_t)(lw); \
24 sloc += 4; ch_size += 4; if(orgactive) orgaddr += 4;}
25 #define D_quad(qw) {chcheck(8);*chptr++=(uint8_t)((qw)>>56); \
26 *chptr++=(uint8_t)((qw)>>48);\
27 *chptr++=(uint8_t)((qw)>>40);\
28 *chptr++=(uint8_t)((qw)>>32);\
29 *chptr++=(uint8_t)((qw)>>24);\
30 *chptr++=(uint8_t)((qw)>>16);\
31 *chptr++=(uint8_t)((qw)>>8); \
32 *chptr++=(uint8_t)(qw); \
33 sloc += 8; ch_size += 8; if(orgactive) orgaddr += 8;}
35 // D_rword deposits a "6502" format (low, high) word (01).
36 #define D_rword(w) {chcheck(2);*chptr++=(uint8_t)(w); \
37 *chptr++=(uint8_t)((w)>>8); \
38 sloc+=2; ch_size+=2;if(orgactive) orgaddr += 2;}
40 // Macro for the 56001. Word size on this device is 24 bits wide. I hope that
41 // orgaddr += 1 means that the addresses in the device reflect this.
42 #define D_dsp(w) {chcheck(3);*chptr++=(uint8_t)(w>>16); \
43 *chptr++=(uint8_t)(w>>8); *chptr++=(uint8_t)w; \
44 sloc+=1; ch_size += 3; if(orgactive) orgaddr += 1; \
45 dsp_written_data_in_current_org=1;}
47 // This macro expects to get an array of uint8_ts with the hi bits in a[0] and
48 // the low bits in a[11] (Big Endian).
49 #define D_extend(a) {chcheck(12); memcpy(chptr, a, 12); chptr+=12; sloc+=12, \
50 ch_size+=12; if (orgactive) orgaddr+=12;}
52 // Fill n bytes with zeroes
53 #define D_ZEROFILL(n) {chcheck(n); memset(chptr, 0, n); chptr+=n; sloc+=n; \
54 ch_size+=n; if (orgactive) orgaddr+=n;}
56 #define NSECTS 16 // Max. number of sections
58 // Tunable (storage) definitions
59 #define CH_THRESHOLD 32 // Minimum amount of space in code chunk
60 #define CH_CODE_SIZE 4096 // Code chunk normal allocation (4K)
62 // Section attributes (.scattr)
63 #define SUSED 0x8000 // Section is used (really, valid)
64 #define SBSS 0x4000 // Section can contain no data
65 #define SABS 0x2000 // Section is absolute
66 #define SPIC 0x1000 // Section is position-independent code
69 #define FUMASK 0x000F // Mask for fixup cases:
70 #define FU_QUICK 0x0000 // Fixup 3-bit quick instruction field
71 #define FU_BYTE 0x0001 // Fixup byte
72 #define FU_WORD 0x0002 // Fixup word
73 #define FU_WBYTE 0x0003 // Fixup byte (at loc+1)
74 #define FU_LONG 0x0004 // Fixup long
75 #define FU_BBRA 0x0005 // Fixup byte branch
76 #define FU_6BRA 0x0007 // Fixup 6502-format branch offset
77 #define FU_BYTEH 0x0008 // Fixup 6502 high byte of immediate word
78 #define FU_BYTEL 0x0009 // Fixup 6502 low byte of immediate word
80 #define FU_SEXT 0x0010 // Ok to sign extend
81 #define FU_PCREL 0x0020 // Subtract PC first
82 #define FU_EXPR 0x0040 // Expression (not symbol) follows
84 #define FU_GLOBAL 0x0080 // Mark global symbol
86 #define FUMASKRISC 0x0F00 // Mask for RISC fixup cases
87 #define FU_MOVEI 0x0100
89 #define FU_REGONE 0x0400
90 #define FU_NUM15 0x0500
91 #define FU_NUM31 0x0600
92 #define FU_NUM32 0x0700
93 #define FU_REGTWO 0x0800
95 #define FU_SUB32 0x1000
96 #define FU_ISBRA 0x2000 // Word forward fixup is a BRA or DBRA
97 #define FU_LBRA 0x4000 // Long branch, for short branch detect
98 #define FU_DONE 0x8000 // Fixup has been done
101 // TODO: these are obviously bogus for now!
102 #define FU_FLOATSING 0x0D0B // Fixup 32-bit float
103 #define FU_FLOATDOUB 0x0E0B // Fixup 64-bit float
104 #define FU_FLOATEXT 0x0F0B // Fixup 96-bit float
106 // Chunks are used to hold generated code and fixup records
107 #define CHUNK struct _chunk
109 CHUNK * chnext; // Next, previous chunks in section
111 uint32_t chloc; // Base addr of this chunk
112 uint32_t challoc; // # bytes allocated for chunk
113 uint32_t ch_size; // # bytes chunk actually uses
114 uint8_t * chptr; // Data for this chunk
117 // Fixup records can also hold an expression (if any)
118 #define FIXUP struct _fixup
120 FIXUP * next; // Pointer to next FIXUP
121 uint32_t attr; // Fixup type
122 uint32_t loc; // Location in section
123 uint16_t fileno; // ID of current file
124 uint32_t lineno; // Current line
125 TOKEN * expr; // Pointer to stored expression (if any)
126 SYM * symbol; // Pointer to symbol (if any)
127 uint32_t orgaddr; // Fixup origin address (used for FU_JR)
130 // Section descriptor
131 #define SECT struct _sect
133 uint16_t scattr; // Section attributes
134 uint32_t sloc; // Current loc-in / size-of section
135 uint32_t relocs; // # of relocations for this section
136 uint32_t orgaddr; // Current org'd address ***NEW***
137 CHUNK * sfcode; // First chunk in section
138 CHUNK * scode; // Last chunk in section
139 FIXUP * sffix; // First fixup
140 FIXUP * sfix; // Last fixup ***NEW***
155 // Helper macros to test for active CPU
156 #define CHECK00 if (activecpu == CPU_68000) return error(unsupport)
157 #define CHECK20 if (activecpu == CPU_68020) return error(unsupport)
158 #define CHECK30 if (activecpu == CPU_68030) return error(unsupport)
159 #define CHECK40 if (activecpu == CPU_68040) return error(unsupport)
160 #define CHECK60 if (activecpu == CPU_68060) return error(unsupport)
161 #define CHECKNO00 if (activecpu != CPU_68000) return error(unsupport)
162 #define CHECKNO20 if (activecpu != CPU_68020) return error(unsupport)
163 #define CHECKNO30 if (activecpu != CPU_68030) return error(unsupport)
164 #define CHECKNO40 if (activecpu != CPU_68040) return error(unsupport)
165 #define CHECKNO60 if (activecpu != CPU_68060) return error(unsupport)
166 #define CHECKNOFPU if (!activefpu) return error(unsupport)
168 // Globals, external etc
169 extern uint32_t sloc;
170 extern uint16_t scattr;
171 extern uint8_t * chptr;
172 extern uint8_t * chptr_opcode;
173 extern uint32_t ch_size;
176 extern uint32_t challoc;
177 extern CHUNK * scode;
180 void InitSection(void);
181 void SwitchSection(int);
182 void SaveSection(void);
183 int fixtest(int, uint32_t);
184 void chcheck(uint32_t);
185 int AddFixup(uint32_t, uint32_t, TOKEN *);
186 int ResolveAllFixups(void);