// SECT.H - Code Generation, Fixups and Section Management
// Copyright (C) 199x Landon Dyer, 2011 Reboot and Friends
// RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
-// Source Utilised with the Kind Permission of Landon Dyer
+// Source utilised with the kind permission of Landon Dyer
//
#ifndef __SECT_H__
// Macros to deposit code in the current section
// D_rword deposits a "6502" format (low, high) word (01).
// D_rlong deposits a MWC "canonical byte order" longword (2301).
-#define D_byte(b) {*chptr++=(char)b; ++sloc; ++ch_size; if(orgactive) ++orgaddr;}
-#define D_word(w) {chcheck(2);*chptr++=(char)(w>>8); *chptr++=(char)w; \
- sloc+=2; ch_size+=2; if(orgactive) orgaddr += 2;}
-#define D_long(lw) {*chptr++=(char)(lw>>24); *chptr++=(char)(lw>>16);\
- *chptr++=(char)(lw>>8); *chptr++=(char)lw; \
- sloc+=4; ch_size += 4; if(orgactive) orgaddr += 4;}
-#define D_rword(w) {*chptr++=(char)w; *chptr++=(char)(w>>8); \
- sloc+=2; ch_size+=2;if(orgactive) orgaddr += 2;}
-#define D_rlong(lw) {*chptr++=(char)(lw>>16);*chptr++=(char)(lw>>24);\
- *chptr++=(char)lw;*chptr++=(char)(lw>>8); \
- sloc+=4; ch_size += 4;if(orgactive) orgaddr += 4;}
-
-#define NSECTS 16 // Max. number of sections
+#define D_byte(b) {*chptr++=(char)b; ++sloc; ++ch_size; if(orgactive) ++orgaddr;}
+#define D_word(w) {chcheck(2);*chptr++=(char)(w>>8); *chptr++=(char)w; \
+ sloc+=2; ch_size+=2; if(orgactive) orgaddr += 2;}
+#define D_long(lw) {*chptr++=(char)(lw>>24); *chptr++=(char)(lw>>16);\
+ *chptr++=(char)(lw>>8); *chptr++=(char)lw; \
+ sloc+=4; ch_size += 4; if(orgactive) orgaddr += 4;}
+//#define D_rword(w) {*chptr++=(char)w; *chptr++=(char)(w>>8); \
+// sloc+=2; ch_size+=2;if(orgactive) orgaddr += 2;}
+//#define D_rlong(lw) {*chptr++=(char)(lw>>16);*chptr++=(char)(lw>>24);\
+// *chptr++=(char)lw;*chptr++=(char)(lw>>8); \
+// sloc+=4; ch_size += 4;if(orgactive) orgaddr += 4;}
+// Fill n bytes with zeroes
+#define D_ZEROFILL(n) {memset(chptr, 0, n); chptr+=n; sloc+=n; ch_size+=n;\
+ if (orgactive) orgaddr+=n;}
+
+#define NSECTS 16 // Max. number of sections
// Tunable (storage) definitions
-#define CH_THRESHOLD 64 // Minimum amount of space in code chunk
-#define CH_CODE_SIZE 2048 // Code chunk normal allocation
-#define CH_FIXUP_SIZE 1024 // Fixup chunk normal allocation
+#define CH_THRESHOLD 64 // Minimum amount of space in code chunk
+#define CH_CODE_SIZE 2048 // Code chunk normal allocation
+#define CH_FIXUP_SIZE 1024 // Fixup chunk normal allocation
// 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
+#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 record a WORD of these bits, followed by a loc and then a pointer
// to a symbol or an ENDEXPR-terminated postfix expression.
// token.L expression list
// (etc)
// ENDEXPR.L (end of expression)
-#define FUMASK 007 // Mask for fixup cases:
-#define FU_QUICK 000 // Fixup 3-bit quick instr field
-#define FU_BYTE 001 // Fixup byte
-#define FU_WORD 002 // Fixup word
-#define FU_WBYTE 003 // Fixup byte (at loc+1)
-#define FU_LONG 004 // Fixup long
-#define FU_BBRA 005 // Fixup byte branch
-#define FU_6BRA 007 // Fixup 6502-format branch offset
-#define FU_SEXT 010 // Ok to sign extend
-#define FU_PCREL 020 // Subtract PC first
-#define FU_EXPR 040 // Expression (not symbol) follows
-
+#define FUMASK 007 // Mask for fixup cases:
+#define FU_QUICK 000 // Fixup 3-bit quick instr field
+#define FU_BYTE 001 // Fixup byte
+#define FU_WORD 002 // Fixup word
+#define FU_WBYTE 003 // Fixup byte (at loc+1)
+#define FU_LONG 004 // Fixup long
+#define FU_BBRA 005 // Fixup byte branch
+#define FU_6BRA 007 // Fixup 6502-format branch offset
+#define FU_SEXT 010 // Ok to sign extend
+#define FU_PCREL 020 // Subtract PC first
+#define FU_EXPR 040 // Expression (not symbol) follows
+
+#define FUMASKRISC 0x0F00 // Mask for RISC fixup cases
#define FU_MOVEI 0x0100
#define FU_JR 0x0200
-#define FU_MJR 0x0300
#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
+#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
// Chunks are used to hold generated code and fixup records
#define CHUNK struct _chunk
CHUNK {
- CHUNK * chnext; // Next, previous chunks in section
+ CHUNK * chnext; // Next, previous chunks in section
CHUNK * chprev;
- LONG chloc; // Base addr of this chunk
- LONG challoc; // #bytes allocated for chunk
- LONG ch_size; // #bytes chunk actually uses
- char * chptr; // Data for this chunk
+ LONG chloc; // Base addr of this chunk
+ LONG challoc; // # bytes allocated for chunk
+ LONG ch_size; // # bytes chunk actually uses
+ char * chptr; // Data for this chunk
};
// Section descriptor
#define SECT struct _sect
SECT {
- WORD scattr; // Section attributes
- LONG sloc; // Current loc-in / size-of section
- CHUNK * sfcode; // First chunk in section
- CHUNK * scode; // Last chunk in section
- CHUNK * sffix; // First fixup chunk
- CHUNK * sfix; // Last fixup chunk
+ WORD scattr; // Section attributes
+ LONG sloc; // Current loc-in / size-of section
+ CHUNK * sfcode; // First chunk in section
+ CHUNK * scode; // Last chunk in section
+ CHUNK * sffix; // First fixup chunk
+ CHUNK * sfix; // Last fixup chunk
};
// A mark is of the form:
// .L [symbol] symbol involved in external reference
#define MCHUNK struct _mchunk
MCHUNK {
- MCHUNK * mcnext; // Next mark chunk
- PTR mcptr; // Vector of marks
- LONG mcalloc; // #marks allocted to mark block
- LONG mcused; // #marks used in block
+ MCHUNK * mcnext; // Next mark chunk
+ PTR mcptr; // Vector of marks
+ LONG mcalloc; // # marks allocted to mark block
+ LONG mcused; // # marks used in block
};
-#define MWORD 0x0000 // Marked word
-#define MLONG 0x0100 // Marked long
+#define MWORD 0x0000 // Marked word
+#define MLONG 0x0100 // Marked long
#define MMOVEI 0x0200
-#define MCHFROM 0x8000 // Mark includes change-to-from
-#define MSYMBOL 0x4000 // Mark includes symbol number
-#define MCHEND 0x2000 // Indicates end of mark chunk
-#define MPCREL 0x1000 // Mark is PC-relative
-
-#define MAXFWDJUMPS 1024 // Maximum forward jumps to check
-extern unsigned fwdjump[MAXFWDJUMPS];
-extern unsigned fwindex;
+#define MCHFROM 0x8000 // Mark includes change-to-from
+#define MSYMBOL 0x4000 // Mark includes symbol number
+#define MCHEND 0x2000 // Indicates end of mark chunk
+#define MPCREL 0x1000 // Mark is PC-relative
// Globals, external etc
extern LONG sloc;
extern CHUNK * scode;
// Prototypes
-void init_sect(void);
-void switchsect(int);
-void savsect(void);
+void InitSection(void);
+void SwitchSection(int);
+void SaveSection(void);
int fixtest(int, LONG);
int chcheck(LONG);
-int fixup(WORD, LONG, TOKEN *);
-int fixups(void);
-int resfix(int);
+int AddFixup(WORD, LONG, TOKEN *);
+int ResolveAllFixups(void);
#endif // __SECT_H__
projects / rmac / blobdiff