// // RMAC - Renamed Macro Assembler for all Atari computers // SECT.H - Code Generation, Fixups and Section Management // Copyright (C) 199x Landon Dyer, 2011-2021 Reboot and Friends // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986 // Source utilized with the kind permission of Landon Dyer // #ifndef __SECT_H__ #define __SECT_H__ #include "rmac.h" #include "riscasm.h" // Macros to deposit code in the current section (in Big Endian) #define D_byte(b) {chcheck(1);*chptr++=(uint8_t)(b); sloc++; ch_size++; \ if(orgactive) orgaddr++;} #define D_word(w) {chcheck(2);*chptr++=(uint8_t)((w)>>8); \ *chptr++=(uint8_t)(w); \ sloc += 2; ch_size += 2; if(orgactive) orgaddr += 2;} #define D_long(lw) {chcheck(4);*chptr++=(uint8_t)((lw)>>24); \ *chptr++=(uint8_t)((lw)>>16);\ *chptr++=(uint8_t)((lw)>>8); \ *chptr++=(uint8_t)(lw); \ sloc += 4; ch_size += 4; if(orgactive) orgaddr += 4;} #define D_quad(qw) {chcheck(8);*chptr++=(uint8_t)((qw)>>56); \ *chptr++=(uint8_t)((qw)>>48);\ *chptr++=(uint8_t)((qw)>>40);\ *chptr++=(uint8_t)((qw)>>32);\ *chptr++=(uint8_t)((qw)>>24);\ *chptr++=(uint8_t)((qw)>>16);\ *chptr++=(uint8_t)((qw)>>8); \ *chptr++=(uint8_t)(qw); \ sloc += 8; ch_size += 8; if(orgactive) orgaddr += 8;} // D_rword deposits a "6502" format (low, high) word (01). #define D_rword(w) {chcheck(2);*chptr++=(uint8_t)(w); \ *chptr++=(uint8_t)((w)>>8); \ sloc+=2; ch_size+=2;if(orgactive) orgaddr += 2;} // Macro for the 56001. Word size on this device is 24 bits wide. I hope that // orgaddr += 1 means that the addresses in the device reflect this. [A: Yes.] #define D_dsp(w) {chcheck(3);*chptr++=(uint8_t)(w>>16); \ *chptr++=(uint8_t)(w>>8); *chptr++=(uint8_t)w; \ sloc+=1; ch_size += 3; if(orgactive) orgaddr += 1; \ dsp_written_data_in_current_org=1;} // This macro expects to get an array of uint8_ts with the hi bits in a[0] and // the low bits in a[11] (Big Endian). #define D_extend(a) {chcheck(12); memcpy(chptr, a, 12); chptr+=12; sloc+=12, \ ch_size+=12; if (orgactive) orgaddr+=12;} // Fill n bytes with zeroes #define D_ZEROFILL(n) {chcheck(n); memset(chptr, 0, n); chptr+=n; sloc+=n; \ ch_size+=n; if (orgactive) orgaddr+=n;} //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 !!! //#define NSECTS 16 // Max. number of sections #define NSECTS 256 // Max. number of sections // Tunable (storage) definitions #define CH_THRESHOLD 32 // Minimum amount of space in code chunk #define CH_CODE_SIZE 4096 // Code chunk normal allocation (4K) // Section attributes (.scattr) #define SUSED 0x8000 // Section is used (really, valid) #define SBSS 0x4000 // Section can contain no data #define SABS 0x2000 // Section is absolute #define SPIC 0x1000 // Section is position-independent code // FIXUP attributes #define FUMASK 0x000F // Mask for fixup cases: #define FU_QUICK 0x0000 // Fixup 3-bit quick instruction field #define FU_BYTE 0x0001 // Fixup byte #define FU_WORD 0x0002 // Fixup word #define FU_WBYTE 0x0003 // Fixup byte (at loc+1) #define FU_LONG 0x0004 // Fixup long #define FU_BBRA 0x0005 // Fixup byte branch #define FU_6BRA 0x0007 // Fixup 6502-format branch offset #define FU_BYTEH 0x0008 // Fixup 6502 high byte of immediate word #define FU_BYTEL 0x0009 // Fixup 6502 low byte of immediate word #define FU_QUAD 0x000A // Fixup quad-word (8 bytes, typically OP) #define FU_56001 0x000B // Fixup code for all 56001 modes #define FU_SEXT 0x0010 // Ok to sign extend #define FU_PCREL 0x0020 // Subtract PC first #define FU_PCRELX 0x1000000 // 030 variant #define FU_EXPR 0x0040 // Expression (not symbol) follows #define FU_GLOBAL 0x0080 // Mark global symbol #define FUMASKRISC 0x0F00 // Mask for RISC fixup cases #define FU_MOVEI 0x0100 #define FU_JR 0x0200 #define FU_REGONE 0x0400 #define FU_NUM15 0x0500 #define FU_NUM31 0x0600 #define FU_NUM32 0x0700 #define FU_REGTWO 0x0800 #define FU_SUB32 0x1000 #define FU_ISBRA 0x2000 // Word forward fixup is a BRA or DBRA #define FU_LBRA 0x4000 // Long branch, for short branch detect #define FU_DONE 0x8000 // Fixup has been done // FPU fixups #define FU_FLOATSING 0x000D // Fixup 32-bit float #define FU_FLOATDOUB 0x000E // Fixup 64-bit float #define FU_FLOATEXT 0x000F // Fixup 96-bit float // OP fixups #define FU_OBJLINK 0x10000 // Fixup OL link addr (bits 24-42, drop last 3) #define FU_OBJDATA 0x20000 // Fixup OL data addr (bits 43-63, drop last 3) // DSP56001 fixups #define FUMASKDSP 0xF00000 // Mask for DSP56001 fuckups^Wfixups #define FU_DSPIMM5 0x100000 // Fixup 5-bit immediate #define FU_DSPADR12 0x200000 // Fixup 12-bit address #define FU_DSPADR24 0x300000 // Fixup 24-bit address #define FU_DSPADR16 0x400000 // Fixup 16-bit address #define FU_DSPIMM12 0x500000 // Fixup 12-bit immediate #define FU_DSPIMM24 0x600000 // Fixup 24-bit immediate #define FU_DSPIMM8 0x700000 // Fixup 8-bit immediate #define FU_DSPADR06 0x800000 // Fixup 6-bit address #define FU_DSPPP06 0x900000 // Fixup 6 bit pp address #define FU_DSPIMMFL8 0xA00000 // Fixup 8-bit immediate float #define FU_DSPIMMFL16 0xB00000 // Fixup 16-bit immediate float #define FU_DSPIMMFL24 0xC00000 // Fixup 24-bit immediate float // Chunks are used to hold generated code and fixup records #define CHUNK struct _chunk CHUNK { CHUNK * chnext; // Next, previous chunks in section CHUNK * chprev; uint32_t chloc; // Base addr of this chunk uint32_t challoc; // # bytes allocated for chunk uint32_t ch_size; // # bytes chunk actually uses uint8_t * chptr; // Data for this chunk }; // Fixup records can also hold an expression (if any) #define FIXUP struct _fixup FIXUP { FIXUP * next; // Pointer to next FIXUP uint32_t attr; // Fixup type uint32_t loc; // Location in section uint16_t fileno; // ID of current file uint32_t lineno; // Current line TOKEN * expr; // Pointer to stored expression (if any) SYM * symbol; // Pointer to symbol (if any) uint32_t orgaddr; // Fixup origin address (used for FU_JR) }; // Section descriptor #define SECT struct _sect SECT { uint16_t scattr; // Section attributes uint32_t sloc; // Current loc-in / size-of section uint32_t relocs; // # of relocations for this section uint32_t orgaddr; // Current org'd address ***NEW*** CHUNK * sfcode; // First chunk in section CHUNK * scode; // Last chunk in section FIXUP * sffix; // First fixup FIXUP * sfix; // Last fixup ***NEW*** }; // 680x0 defines #define CPU_68000 1 #define CPU_68020 2 #define CPU_68030 4 #define CPU_68040 8 #define CPU_68060 16 #define FPU_NONE 0 #define FPU_68881 1 #define FPU_68882 2 #define FPU_68040 4 #define FPU_68060 8 // Helper macros to test for active CPU #define CHECK00 if (activecpu == CPU_68000) return error(unsupport) #define CHECK20 if (activecpu == CPU_68020) return error(unsupport) #define CHECK30 if (activecpu == CPU_68030) return error(unsupport) #define CHECK40 if (activecpu == CPU_68040) return error(unsupport) #define CHECK60 if (activecpu == CPU_68060) return error(unsupport) #define CHECKNO00 if (activecpu != CPU_68000) return error(unsupport) #define CHECKNO20 if (activecpu != CPU_68020) return error(unsupport) #define CHECKNO30 if (activecpu != CPU_68030) return error(unsupport) #define CHECKNO40 if (activecpu != CPU_68040) return error(unsupport) #define CHECKNO60 if (activecpu != CPU_68060) return error(unsupport) #define CHECKNOFPU if (!activefpu) return error(unsupport) // Globals, external etc extern uint32_t sloc; extern uint16_t scattr; extern uint8_t * chptr; extern uint8_t * chptr_opcode; extern uint32_t ch_size; extern int cursect; extern SECT sect[]; extern uint32_t challoc; extern CHUNK * scode; // Prototypes void InitSection(void); void SwitchSection(int); void SaveSection(void); int fixtest(int, uint32_t); void chcheck(uint32_t); int AddFixup(uint32_t, uint32_t, TOKEN *); int ResolveAllFixups(void); #endif // __SECT_H__