#include "listing.h"
#include "mach.h"
#include "mark.h"
-#include "risca.h"
+#include "riscasm.h"
#include "symbol.h"
#include "token.h"
+
+// Function prototypes
+void MakeSection(int, WORD);
+void SwitchSection(int);
+
// Section descriptors
-SECT sect[NSECTS]; // All sections...
-int cursect; // Current section number
+SECT sect[NSECTS]; // All sections...
+int cursect; // Current section number
// These are copied from the section descriptor, the current code chunk
// descriptor and the current fixup chunk descriptor when a switch is made into
// a section. They are copied back to the descriptors when the section is left.
-WORD scattr; // Section attributes
-LONG sloc; // Current loc in section
+WORD scattr; // Section attributes
+LONG sloc; // Current loc in section
-CHUNK * scode; // Current (last) code chunk
-LONG challoc; // # bytes alloc'd to code chunk
-LONG ch_size; // # bytes used in code chunk
-char * chptr; // Deposit point in code chunk buffer
+CHUNK * scode; // Current (last) code chunk
+LONG challoc; // # bytes alloc'd to code chunk
+LONG ch_size; // # bytes used in code chunk
+char * chptr; // Deposit point in code chunk buffer
-CHUNK * sfix; // Current (last) fixup chunk
-LONG fchalloc; // # bytes alloc'd to fixup chunk
-LONG fchsize; // # bytes used in fixup chunk
-PTR fchptr; // Deposit point in fixup chunk buffer
-
-unsigned fwdjump[MAXFWDJUMPS]; // forward jump check table
-unsigned fwindex = 0; // forward jump index
+CHUNK * sfix; // Current (last) fixup chunk
+LONG fchalloc; // # bytes alloc'd to fixup chunk
+LONG fchsize; // # bytes used in fixup chunk
+PTR fchptr; // Deposit point in fixup chunk buffer
// Return a size (SIZB, SIZW, SIZL) or 0, depending on what kind of fixup is
// associated with a location.
static char fusiztab[] = {
- 0, // FU_QUICK
- 1, // FU_BYTE
- 2, // FU_WORD
- 2, // FU_WBYTE
- 4, // FU_LONG
- 1, // FU_BBRA
- 0, // (unused)
- 1, // FU_6BRA
+ 0, // FU_QUICK
+ 1, // FU_BYTE
+ 2, // FU_WORD
+ 2, // FU_WBYTE
+ 4, // FU_LONG
+ 1, // FU_BBRA
+ 0, // (unused)
+ 1, // FU_6BRA
};
// Offset to REAL fixup location
static char fusizoffs[] = {
- 0, // FU_QUICK
- 0, // FU_BYTE
- 0, // FU_WORD
- 1, // FU_WBYTE
- 0, // FU_LONG
- 1, // FU_BBRA
- 0, // (unused)
- 0, // FU_6BRA
+ 0, // FU_QUICK
+ 0, // FU_BYTE
+ 0, // FU_WORD
+ 1, // FU_WBYTE
+ 0, // FU_LONG
+ 1, // FU_BBRA
+ 0, // (unused)
+ 0, // FU_6BRA
};
//
-// Make a New (Clean) Section
+// Initialize Sections; Setup initial ABS, TEXT, DATA and BSS sections
//
-void mksect(int sno, WORD attr)
+void InitSection(void)
{
- SECT * p; // Section pointer
+ int i;
+
+ // Cleanup all sections
+ for(i=0; i<NSECTS; i++)
+ MakeSection(i, 0);
+
+ // Construct default sections, make TEXT the current section
+ MakeSection(ABS, SUSED | SABS | SBSS); // ABS
+ MakeSection(TEXT, SUSED | TEXT ); // TEXT
+ MakeSection(DATA, SUSED | DATA ); // DATA
+ MakeSection(BSS, SUSED | BSS | SBSS); // BSS
+// MakeSection(M6502, SUSED | TEXT ); // 6502 code section
+
+ SwitchSection(TEXT); // Switch to TEXT for starters
+}
- p = §[sno];
+
+//
+// Make a New (Clean) Section
+//
+void MakeSection(int sno, WORD attr)
+{
+ SECT * p = §[sno];
p->scattr = attr;
p->sloc = 0;
p->scode = p->sfcode = NULL;
//
-// Switch to Another Section (Copy Section & Chunk Descriptors to Global Vars
-// for Fast Access)
+// Switch to another section (copy section & chunk descriptors to global vars
+// for fast access)
//
-void switchsect(int sno)
+void SwitchSection(int sno)
{
CHUNK * cp; // Chunk pointer
cursect = sno;
//
-// Save Current Section
+// Save current section
//
-void savsect(void)
+void SaveSection(void)
{
SECT * p = §[cursect];
- p->scattr = scattr; // Bailout section vars
+ p->scattr = scattr; // Bailout section vars
p->sloc = sloc;
- if (scode != NULL) // Bailout code chunk
+ if (scode != NULL) // Bailout code chunk
scode->ch_size = ch_size;
- if (sfix != NULL) // Bailout fixup chunk
+ if (sfix != NULL) // Bailout fixup chunk
sfix->ch_size = fchsize;
}
-//
-// Initialize Sections; Setup initial ABS, TEXT, DATA and BSS sections
-//
-void init_sect(void)
-{
- int i;
-
- // Cleanup all sections
- for(i=0; i<NSECTS; i++)
- mksect(i, 0);
-
- // Construct default sections, make TEXT the current section
- mksect(ABS, SUSED | SABS | SBSS); // ABS
- mksect(TEXT, SUSED | TEXT ); // TEXT
- mksect(DATA, SUSED | DATA ); // DATA
- mksect(BSS, SUSED | BSS | SBSS ); // BSS
-// mksect(M6502, SUSED | TEXT ); // 6502 code section
-
- switchsect(TEXT); // Switch to TEXT for starters
-}
-
-
//
// Test to see if a location has a fixup sic'd on it. This is used by the
// listing generator to print 'xx's instead of '00's for forward references
//
int chcheck(LONG amt)
{
+ DEBUG { printf("chcheck(%u)\n", amt); }
// If in BSS section, no allocation required
if (scattr & SBSS)
return 0;
if (!amt)
amt = CH_THRESHOLD;
+ DEBUG { printf(" challoc=%i, ch_size=%i, diff=%i\n", challoc, ch_size, challoc-ch_size); }
if ((int)(challoc - ch_size) >= (int)amt)
return 0;
if (amt < CH_CODE_SIZE)
amt = CH_CODE_SIZE;
+ DEBUG { printf(" amt (adjusted)=%u\n", amt); }
SECT * p = §[cursect];
CHUNK * cp = malloc(sizeof(CHUNK) + amt);
//
// Arrange for a fixup on a location
//
-int fixup(WORD attr, LONG loc, TOKEN * fexpr)
+int AddFixup(WORD attr, LONG loc, TOKEN * fexpr)
{
LONG i;
LONG len = 0;
CHUNK * cp;
SECT * p;
- // Shamus: Expression lengths are voodoo ATM (varibale "i"). Need to fix this.
+ // Shamus: Expression lengths are voodoo ATM (variable "i"). Need to fix this.
+#warning "!!! AddFixup() is filled with VOODOO !!!"
DEBUG printf("FIXUP@$%X: $%X\n", loc, attr);
// Compute length of expression (could be faster); determine if it's the
{
// Just a single symbol
// SCPCD : correct bit mask for attr (else other FU_xxx will match) NYAN !
- if ((attr & 0x0F00) == FU_JR)
+ if ((attr & FUMASKRISC) == FU_JR)
{
// i = 18;
- i = FIXUP_BASE_SIZE + (sizeof(LONG) * 2);
+// i = FIXUP_BASE_SIZE + (sizeof(LONG) * 2);
+ i = FIXUP_BASE_SIZE + sizeof(SYM *) + sizeof(LONG);
}
else
{
}
// SCPCD : correct bit mask for attr (else other FU_xxx will match) NYAN !
- if ((attr & 0x0F00) == FU_JR)
+ if ((attr & FUMASKRISC) == FU_JR)
{
if (orgactive)
*fchptr.lp++ = orgaddr;
ResolveFixups(TEXT);
DEBUG printf("Resolving DATA sections...\n");
ResolveFixups(DATA);
-
- // We need to do a final check of forward 'jump' destination addresses that
- // are external
- for(i=0; i<MAXFWDJUMPS; i++)
- {
- if (fwdjump[i])
- {
- err_setup();
- sprintf(buf, "* \'jump\' at $%08X - destination address is external to this source file and cannot have its aligment validated", fwdjump[i]);
-
- if (listing > 0)
- ship_ln(buf);
-
- if (err_flag)
- write(err_fd, buf, (LONG)strlen(buf));
- else
- printf("%s\n", buf);
- }
- }
return 0;
}
if (ch == NULL)
return 0;
- CHUNK * cch = sc->sfcode; // "cache" first chunk
+ // "Cache" first chunk
+ CHUNK * cch = sc->sfcode;
- if (cch == NULL) // Can't fixup a sect with nothing in it
+ // Can't fixup a sect with nothing in it
+ if (cch == NULL)
return 0;
do
loc = *fup.lp++;
cfileno = *fup.wp++;
curlineno = (int)*fup.wp++;
+DEBUG { printf("ResolveFixups: cfileno=%u\n", cfileno); }
+ // This is based on global vars cfileno, curfname :-P
+ // This approach is kinda meh as well. I think we can do better than this.
+ SetFilenameForErrorReporting();
esym = NULL;
if (cch == NULL)
{
- interror(7); // Fixup (loc) out of range
+ // Fixup (loc) out of range
+ interror(7);
// NOTREACHED
}
}
// If the expression is undefined and no external symbol is
// involved, then it's an error.
- if (!(eattr & DEFINED) && esym == NULL)
+ if (!(eattr & DEFINED) && (esym == NULL))
{
error(undef_error);
continue;
}
- if (((w & 0x0F00) == FU_MOVEI) && esym)
+// It seems that this is completely unnecessary!
+#if 0
+ if (((w & FUMASKRISC) == FU_MOVEI) && esym)
+//{
+//printf("DoFixups: Setting symbol attre to RISCSYM...\n");
esym->sattre |= RISCSYM;
+//}
+#endif
// Do the fixup
//
break;
// Fixup one-byte value at locp + 1.
case FU_WBYTE:
- ++locp;
+ locp++;
// FALLTHROUGH
// Fixup one-byte forward references
case FU_BYTE:
// the word could be unaligned in the section buffer, so we have to
// be careful.
case FU_WORD:
- if (((w & 0x0F00) == FU_JR) || ((w & 0x0F00) == FU_MJR))
+ if ((w & FUMASKRISC) == FU_JR)// || ((w & 0x0F00) == FU_MJR))
{
oaddr = *fup.lp++;
if (oaddr)
- {
reg2 = (signed)((eval - (oaddr + 2)) / 2);// & 0x1F;
- }
else
- {
reg2 = (signed)((eval - (loc + 2)) / 2);// & 0x1F;
- }
+#if 0
if ((w & 0x0F00) == FU_MJR)
{
// Main code destination alignment checking here for
}
}
}
+#endif
if ((reg2 < -16) || (reg2 > 15))
{
break;
}
- if ((w & 0x0F00) == FU_NUM15)
+ if ((w & FUMASKRISC) == FU_NUM15)
{
if (eval < -16 || eval > 15)
{
break;
}
- if ((w & 0x0F00) == FU_NUM31)
+ if ((w & FUMASKRISC) == FU_NUM31)
{
if (eval < 0 || eval > 31)
{
break;
}
- if ((w & 0x0F00) == FU_NUM32)
+ if ((w & FUMASKRISC) == FU_NUM32)
{
if (eval < 1 || eval > 32)
{
break;
}
- if ((w & 0x0F00) == FU_REGONE)
+ if ((w & FUMASKRISC) == FU_REGONE)
{
if (eval < 0 || eval > 31)
{
break;
}
- if ((w & 0x0F00) == FU_REGTWO)
+ if ((w & FUMASKRISC) == FU_REGTWO)
{
if (eval < 0 || eval > 31)
{
// the long could be unaligned in the section buffer, so be careful
// (again).
case FU_LONG:
- if ((w & 0x0F00) == FU_MOVEI)
+ if ((w & FUMASKRISC) == FU_MOVEI)
{
+#if 0
address = loc + 4;
if (eattr & DEFINED)
}
}
}
+#endif
+ // Long constant in MOVEI # is word-swapped, so fix it here
eval = ((eval >> 16) & 0x0000FFFF) | ((eval << 16) & 0xFFFF0000);
- flags = (MLONG|MMOVEI);
+ flags = (MLONG | MMOVEI);
}
else
flags = MLONG;
if (!(eattr & DEFINED))
{
+//printf("Fixup (long): Symbol undefined. loc = $%X, long = $%X, flags = $%x\n", loc, eval, flags);
rmark(sno, loc, 0, flags, esym);
}
else if (tdb)
{
+//printf("Fixup (long): TDB = $%X. loc =$%X, long = $%X, flags = $%x\n", tdb, loc, eval, flags);
rmark(sno, loc, tdb, flags, NULL);
}
+//else
+//printf("Fixup (long): TDB = $%X. loc =$%X, long = $%X, flags = $%x\n", tdb, loc, eval, flags);
*locp++ = (char)(eval >> 24);
*locp++ = (char)(eval >> 16);
*locp++ = (char)(eval >> 8);
*locp = (char)eval;
break;
+
// Fixup a 3-bit "QUICK" reference in bits 9..1
// (range of 1..8) in a word. Really bits 1..3 in a byte.
case FU_QUICK:
*locp |= (eval & 7) << 1;
break;
+
// Fix up 6502 funny branch
case FU_6BRA:
eval -= (loc + 1);
*locp = (char)eval;
break;
+
default:
interror(4); // Bad fixup type
// NOTREACHED
return 0;
}
+
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