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
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 #define NSECTS 16 // Max. number of sections
59 // Tunable (storage) definitions
60 #define CH_THRESHOLD 32 // Minimum amount of space in code chunk
61 #define CH_CODE_SIZE 4096 // Code chunk normal allocation (4K)
63 // Section attributes (.scattr)
64 #define SUSED 0x8000 // Section is used (really, valid)
65 #define SBSS 0x4000 // Section can contain no data
66 #define SABS 0x2000 // Section is absolute
67 #define SPIC 0x1000 // Section is position-independent code
70 #define FUMASK 0x000F // Mask for fixup cases:
71 #define FU_QUICK 0x0000 // Fixup 3-bit quick instruction field
72 #define FU_BYTE 0x0001 // Fixup byte
73 #define FU_WORD 0x0002 // Fixup word
74 #define FU_WBYTE 0x0003 // Fixup byte (at loc+1)
75 #define FU_LONG 0x0004 // Fixup long
76 #define FU_BBRA 0x0005 // Fixup byte branch
77 #define FU_6BRA 0x0007 // Fixup 6502-format branch offset
78 #define FU_BYTEH 0x0008 // Fixup 6502 high byte of immediate word
79 #define FU_BYTEL 0x0009 // Fixup 6502 low byte of immediate word
80 #define FU_QUAD 0x000A // Fixup quad-word (8 bytes)
81 #define FU_56001 0x000B // Generic fixup code for all 56001 modes
82 #define FU_56001_B 0x000C // Generic fixup code for all 56001 modes (ggn: I have no shame)
84 #define FU_SEXT 0x0010 // Ok to sign extend
85 #define FU_PCREL 0x0020 // Subtract PC first
86 #define FU_EXPR 0x0040 // Expression (not symbol) follows
88 #define FU_GLOBAL 0x0080 // Mark global symbol
90 #define FUMASKRISC 0x0F00 // Mask for RISC fixup cases
91 #define FU_MOVEI 0x0100
93 #define FU_REGONE 0x0400
94 #define FU_NUM15 0x0500
95 #define FU_NUM31 0x0600
96 #define FU_NUM32 0x0700
97 #define FU_REGTWO 0x0800
99 #define FU_SUB32 0x1000
100 #define FU_ISBRA 0x2000 // Word forward fixup is a BRA or DBRA
101 #define FU_LBRA 0x4000 // Long branch, for short branch detect
102 #define FU_DONE 0x8000 // Fixup has been done
105 #define FU_FLOATSING 0x000D // Fixup 32-bit float
106 #define FU_FLOATDOUB 0x000E // Fixup 64-bit float
107 #define FU_FLOATEXT 0x000F // Fixup 96-bit float
110 #define FU_OBJLINK 0x10000 // Fixup OL link addr (bits 24-42, drop last 3)
111 #define FU_OBJDATA 0x20000 // Fixup OL data addr (bits 43-63, drop last 3)
114 // TODO: Sadly we don't have any spare bits left inside a 16-bit word
115 // so we use the 2nd nibble as control code and
116 // stick $B or $C in the lower nibble - then it's picked up as
117 // FU_56001 by the fixup routine and then a second switch
118 // selects fixup mode. Since we now have 32 bits, we can fix this!
119 // [N.B.: This isn't true anymore, we now have 32 bits! :-P]
120 #define FU_DSPIMM5 0x090B // Fixup 5-bit immediate
121 #define FU_DSPADR12 0x0A0B // Fixup 12-bit address
122 #define FU_DSPADR24 0x0B0B // Fixup 24-bit address
123 #define FU_DSPADR16 0x0C0B // Fixup 24-bit address
124 #define FU_DSPIMM12 0x0D0B // Fixup 12-bit immediate
125 #define FU_DSPIMM24 0x0E0B // Fixup 24-bit immediate
126 #define FU_DSPIMM8 0x0F0B // Fixup 8-bit immediate
127 #define FU_DSPADR06 0x090C // Fixup 6-bit address
128 #define FU_DSPPP06 0x0A0C // Fixup 6 bit pp address
129 #define FU_DSPIMMFL8 0x0B0C // Fixup 8-bit immediate float
130 #define FU_DSPIMMFL16 0x0C0C // Fixup 16-bit immediate float
131 #define FU_DSPIMMFL24 0x0D0C // Fixup 24-bit immediate float
134 // Chunks are used to hold generated code and fixup records
135 #define CHUNK struct _chunk
137 CHUNK * chnext; // Next, previous chunks in section
139 uint32_t chloc; // Base addr of this chunk
140 uint32_t challoc; // # bytes allocated for chunk
141 uint32_t ch_size; // # bytes chunk actually uses
142 uint8_t * chptr; // Data for this chunk
145 // Fixup records can also hold an expression (if any)
146 #define FIXUP struct _fixup
148 FIXUP * next; // Pointer to next FIXUP
149 uint32_t attr; // Fixup type
150 uint32_t loc; // Location in section
151 uint16_t fileno; // ID of current file
152 uint32_t lineno; // Current line
153 TOKEN * expr; // Pointer to stored expression (if any)
154 SYM * symbol; // Pointer to symbol (if any)
155 uint32_t orgaddr; // Fixup origin address (used for FU_JR)
158 // Section descriptor
159 #define SECT struct _sect
161 uint16_t scattr; // Section attributes
162 uint32_t sloc; // Current loc-in / size-of section
163 uint32_t relocs; // # of relocations for this section
164 uint32_t orgaddr; // Current org'd address ***NEW***
165 CHUNK * sfcode; // First chunk in section
166 CHUNK * scode; // Last chunk in section
167 FIXUP * sffix; // First fixup
168 FIXUP * sfix; // Last fixup ***NEW***
183 // Helper macros to test for active CPU
184 #define CHECK00 if (activecpu == CPU_68000) return error(unsupport)
185 #define CHECK20 if (activecpu == CPU_68020) return error(unsupport)
186 #define CHECK30 if (activecpu == CPU_68030) return error(unsupport)
187 #define CHECK40 if (activecpu == CPU_68040) return error(unsupport)
188 #define CHECK60 if (activecpu == CPU_68060) return error(unsupport)
189 #define CHECKNO00 if (activecpu != CPU_68000) return error(unsupport)
190 #define CHECKNO20 if (activecpu != CPU_68020) return error(unsupport)
191 #define CHECKNO30 if (activecpu != CPU_68030) return error(unsupport)
192 #define CHECKNO40 if (activecpu != CPU_68040) return error(unsupport)
193 #define CHECKNO60 if (activecpu != CPU_68060) return error(unsupport)
194 #define CHECKNOFPU if (!activefpu) return error(unsupport)
196 // Globals, external etc
197 extern uint32_t sloc;
198 extern uint16_t scattr;
199 extern uint8_t * chptr;
200 extern uint8_t * chptr_opcode;
201 extern uint32_t ch_size;
204 extern uint32_t challoc;
205 extern CHUNK * scode;
208 void InitSection(void);
209 void SwitchSection(int);
210 void SaveSection(void);
211 int fixtest(int, uint32_t);
212 void chcheck(uint32_t);
213 int AddFixup(uint32_t, uint32_t, TOKEN *);
214 int ResolveAllFixups(void);