2 // RMAC - Renamed Macro Assembler for all Atari computers
3 // SECT.H - Code Generation, Fixups and Section Management
4 // Copyright (C) 199x Landon Dyer, 2011-2021 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
15 // Macros to deposit code in the current section (in Big Endian)
16 #define D_byte(b) {chcheck(1);*chptr++=(uint8_t)(b); sloc++; ch_size++; \
17 if(orgactive) orgaddr++;}
18 #define D_word(w) {chcheck(2);*chptr++=(uint8_t)((w)>>8); \
19 *chptr++=(uint8_t)(w); \
20 sloc += 2; ch_size += 2; if(orgactive) orgaddr += 2;}
21 #define D_long(lw) {chcheck(4);*chptr++=(uint8_t)((lw)>>24); \
22 *chptr++=(uint8_t)((lw)>>16);\
23 *chptr++=(uint8_t)((lw)>>8); \
24 *chptr++=(uint8_t)(lw); \
25 sloc += 4; ch_size += 4; if(orgactive) orgaddr += 4;}
26 #define D_quad(qw) {chcheck(8);*chptr++=(uint8_t)((qw)>>56); \
27 *chptr++=(uint8_t)((qw)>>48);\
28 *chptr++=(uint8_t)((qw)>>40);\
29 *chptr++=(uint8_t)((qw)>>32);\
30 *chptr++=(uint8_t)((qw)>>24);\
31 *chptr++=(uint8_t)((qw)>>16);\
32 *chptr++=(uint8_t)((qw)>>8); \
33 *chptr++=(uint8_t)(qw); \
34 sloc += 8; ch_size += 8; if(orgactive) orgaddr += 8;}
36 // D_rword deposits a "6502" format (low, high) word (01).
37 #define D_rword(w) {chcheck(2);*chptr++=(uint8_t)(w); \
38 *chptr++=(uint8_t)((w)>>8); \
39 sloc+=2; ch_size+=2;if(orgactive) orgaddr += 2;}
41 // Macro for the 56001. Word size on this device is 24 bits wide. I hope that
42 // orgaddr += 1 means that the addresses in the device reflect this. [A: Yes.]
43 #define D_dsp(w) {chcheck(3);*chptr++=(uint8_t)(w>>16); \
44 *chptr++=(uint8_t)(w>>8); *chptr++=(uint8_t)w; \
45 sloc+=1; ch_size += 3; if(orgactive) orgaddr += 1; \
46 dsp_written_data_in_current_org=1;}
48 // This macro expects to get an array of uint8_ts with the hi bits in a[0] and
49 // the low bits in a[11] (Big Endian).
50 #define D_extend(a) {chcheck(12); memcpy(chptr, a, 12); chptr+=12; sloc+=12, \
51 ch_size+=12; if (orgactive) orgaddr+=12;}
53 // Fill n bytes with zeroes
54 #define D_ZEROFILL(n) {chcheck(n); memset(chptr, 0, n); chptr+=n; sloc+=n; \
55 ch_size+=n; if (orgactive) orgaddr+=n;}
57 //OK, this is bad, mmkay? The constants defined in rmac.h are used as indices into an array which means that this was never meant to be defined this way--at least if it was, it was a compromise that has come home to bite us all in the ass. !!! FIX !!!
58 //#define NSECTS 16 // Max. number of sections
59 #define NSECTS 256 // Max. number of sections
61 // Tunable (storage) definitions
62 #define CH_THRESHOLD 32 // Minimum amount of space in code chunk
63 #define CH_CODE_SIZE 4096 // Code chunk normal allocation (4K)
65 // Section attributes (.scattr)
66 #define SUSED 0x8000 // Section is used (really, valid)
67 #define SBSS 0x4000 // Section can contain no data
68 #define SABS 0x2000 // Section is absolute
69 #define SPIC 0x1000 // Section is position-independent code
72 #define FUMASK 0x000F // Mask for fixup cases:
73 #define FU_QUICK 0x0000 // Fixup 3-bit quick instruction field
74 #define FU_BYTE 0x0001 // Fixup byte
75 #define FU_WORD 0x0002 // Fixup word
76 #define FU_WBYTE 0x0003 // Fixup byte (at loc+1)
77 #define FU_LONG 0x0004 // Fixup long
78 #define FU_BBRA 0x0005 // Fixup byte branch
79 #define FU_6BRA 0x0007 // Fixup 6502-format branch offset
80 #define FU_BYTEH 0x0008 // Fixup 6502 high byte of immediate word
81 #define FU_BYTEL 0x0009 // Fixup 6502 low byte of immediate word
82 #define FU_QUAD 0x000A // Fixup quad-word (8 bytes, typically OP)
83 #define FU_56001 0x000B // Fixup code for all 56001 modes
85 #define FU_SEXT 0x0010 // Ok to sign extend
86 #define FU_PCREL 0x0020 // Subtract PC first
87 #define FU_PCRELX 0x1000000 // 030 variant
88 #define FU_EXPR 0x0040 // Expression (not symbol) follows
90 #define FU_GLOBAL 0x0080 // Mark global symbol
92 #define FUMASKRISC 0x0F00 // Mask for RISC fixup cases
93 #define FU_MOVEI 0x0100
95 #define FU_REGONE 0x0400
96 #define FU_NUM15 0x0500
97 #define FU_NUM31 0x0600
98 #define FU_NUM32 0x0700
99 #define FU_REGTWO 0x0800
101 #define FU_SUB32 0x1000
102 #define FU_ISBRA 0x2000 // Word forward fixup is a BRA or DBRA
103 #define FU_LBRA 0x4000 // Long branch, for short branch detect
104 #define FU_DONE 0x8000 // Fixup has been done
107 #define FU_FLOATSING 0x000D // Fixup 32-bit float
108 #define FU_FLOATDOUB 0x000E // Fixup 64-bit float
109 #define FU_FLOATEXT 0x000F // Fixup 96-bit float
112 #define FU_OBJLINK 0x10000 // Fixup OL link addr (bits 24-42, drop last 3)
113 #define FU_OBJDATA 0x20000 // Fixup OL data addr (bits 43-63, drop last 3)
116 #define FUMASKDSP 0xF00000 // Mask for DSP56001 fuckups^Wfixups
117 #define FU_DSPIMM5 0x100000 // Fixup 5-bit immediate
118 #define FU_DSPADR12 0x200000 // Fixup 12-bit address
119 #define FU_DSPADR24 0x300000 // Fixup 24-bit address
120 #define FU_DSPADR16 0x400000 // Fixup 16-bit address
121 #define FU_DSPIMM12 0x500000 // Fixup 12-bit immediate
122 #define FU_DSPIMM24 0x600000 // Fixup 24-bit immediate
123 #define FU_DSPIMM8 0x700000 // Fixup 8-bit immediate
124 #define FU_DSPADR06 0x800000 // Fixup 6-bit address
125 #define FU_DSPPP06 0x900000 // Fixup 6 bit pp address
126 #define FU_DSPIMMFL8 0xA00000 // Fixup 8-bit immediate float
127 #define FU_DSPIMMFL16 0xB00000 // Fixup 16-bit immediate float
128 #define FU_DSPIMMFL24 0xC00000 // Fixup 24-bit immediate float
131 // Chunks are used to hold generated code and fixup records
132 #define CHUNK struct _chunk
134 CHUNK * chnext; // Next, previous chunks in section
136 uint32_t chloc; // Base addr of this chunk
137 uint32_t challoc; // # bytes allocated for chunk
138 uint32_t ch_size; // # bytes chunk actually uses
139 uint8_t * chptr; // Data for this chunk
142 // Fixup records can also hold an expression (if any)
143 #define FIXUP struct _fixup
145 FIXUP * next; // Pointer to next FIXUP
146 uint32_t attr; // Fixup type
147 uint32_t loc; // Location in section
148 uint16_t fileno; // ID of current file
149 uint32_t lineno; // Current line
150 TOKEN * expr; // Pointer to stored expression (if any)
151 SYM * symbol; // Pointer to symbol (if any)
152 uint32_t orgaddr; // Fixup origin address (used for FU_JR)
155 // Section descriptor
156 #define SECT struct _sect
158 uint16_t scattr; // Section attributes
159 uint32_t sloc; // Current loc-in / size-of section
160 uint32_t relocs; // # of relocations for this section
161 uint32_t orgaddr; // Current org'd address ***NEW***
162 CHUNK * sfcode; // First chunk in section
163 CHUNK * scode; // Last chunk in section
164 FIXUP * sffix; // First fixup
165 FIXUP * sfix; // Last fixup ***NEW***
180 // Helper macros to test for active CPU
181 #define CHECK00 if (activecpu == CPU_68000) return error(unsupport)
182 #define CHECK20 if (activecpu == CPU_68020) return error(unsupport)
183 #define CHECK30 if (activecpu == CPU_68030) return error(unsupport)
184 #define CHECK40 if (activecpu == CPU_68040) return error(unsupport)
185 #define CHECK60 if (activecpu == CPU_68060) return error(unsupport)
186 #define CHECKNO00 if (activecpu != CPU_68000) return error(unsupport)
187 #define CHECKNO20 if (activecpu != CPU_68020) return error(unsupport)
188 #define CHECKNO30 if (activecpu != CPU_68030) return error(unsupport)
189 #define CHECKNO40 if (activecpu != CPU_68040) return error(unsupport)
190 #define CHECKNO60 if (activecpu != CPU_68060) return error(unsupport)
191 #define CHECKNOFPU if (!activefpu) return error(unsupport)
193 // Globals, external etc
194 extern uint32_t sloc;
195 extern uint16_t scattr;
196 extern uint8_t * chptr;
197 extern uint8_t * chptr_opcode;
198 extern uint32_t ch_size;
201 extern uint32_t challoc;
202 extern CHUNK * scode;
205 void InitSection(void);
206 void SwitchSection(int);
207 void SaveSection(void);
208 int fixtest(int, uint32_t);
209 void chcheck(uint32_t);
210 int AddFixup(uint32_t, uint32_t, TOKEN *);
211 int ResolveAllFixups(void);