//
// RMAC - Reboot's Macro Assembler for all Atari computers
// SECT.C - Code Generation, Fixups and Section Management
-// Copyright (C) 199x Landon Dyer, 2011-2017 Reboot and Friends
+// Copyright (C) 199x Landon Dyer, 2011-2019 Reboot and Friends
// RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
// Source utilised with the kind permission of Landon Dyer
//
#include "sect.h"
#include "6502.h"
#include "direct.h"
+#include "dsp56k.h"
#include "error.h"
#include "expr.h"
#include "listing.h"
#include "token.h"
-// Minimum size of a fixup record
-#define MIN_FIXUP_MEM (3 * sizeof(uint16_t) + 1 * sizeof(uint32_t))
-
// Function prototypes
void MakeSection(int, uint16_t);
void SwitchSection(int);
// 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.
+// a section. They are copied back to the descriptors when the section is left.
uint16_t scattr; // Section attributes
uint32_t sloc; // Current loc in section
uint8_t * chptr; // Deposit point in code chunk buffer
uint8_t * chptr_opcode; // Backup of chptr, updated before entering code generators
-CHUNK * sfix; // Current (last) fixup chunk
-uint32_t fchalloc; // # bytes alloc'd to fixup chunk
-uint32_t 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 uint8_t fusiztab[] = {
//
void InitSection(void)
{
- // Cleanup all sections
+ // Initialize all sections
for(int 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
+ 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
+ MakeSection(M56001P, SUSED | SABS ); // DSP 56001 Program RAM
+ MakeSection(M56001X, SUSED | SABS ); // DSP 56001 X RAM
+ MakeSection(M56001Y, SUSED | SABS ); // DSP 56001 Y RAM
// Switch to TEXT for starters
SwitchSection(TEXT);
//
void MakeSection(int sno, uint16_t attr)
{
- SECT * p = §[sno];
- p->scattr = attr;
- p->sloc = 0;
- p->scode = p->sfcode = NULL;
- p->sfix = p->sffix = NULL;
+ SECT * sp = §[sno];
+ sp->scattr = attr;
+ sp->sloc = 0;
+ sp->orgaddr = 0;
+ sp->scode = sp->sfcode = NULL;
+ sp->sfix = sp->sffix = NULL;
}
{
CHUNK * cp;
cursect = sno;
- SECT * p = §[sno];
+ SECT * sp = §[sno];
m6502 = (sno == M6502); // Set 6502-mode flag
// Copy section vars
- scattr = p->scattr;
- sloc = p->sloc;
- scode = p->scode;
- sfix = p->sfix;
+ scattr = sp->scattr;
+ sloc = sp->sloc;
+ scode = sp->scode;
+ orgaddr = sp->orgaddr;
// Copy code chunk vars
if ((cp = scode) != NULL)
chptr = cp->chptr + ch_size;
// For 6502 mode, add the last org'd address
+// Why?
+/*
+Because the way this is set up it treats the 6502 assembly space as a single 64K space (+ 16 bytes, for some unknown reason) and just bobbles around inside that space and uses a stack of org "pointers" to show where the data ended up.
+
+This is a shitty way to handle things, and we can do better than this! :-P
+
+Really, there's no reason to have the 6502 (or DSP56001 for that matter) have their own private sections for this kind of thing, as there's literally *no* chance that it would be mingled with 68K+ code. It should be able to use the TEXT, DATA & BSS sections just like the 68K.
+
+Or should it? After looking at the code, maybe it's better to keep the 56001 sections segregated from the rest. But we can still make the 6502 stuff better.
+*/
if (m6502)
chptr = cp->chptr + orgaddr;
}
else
challoc = ch_size = 0;
-
- // Copy fixup chunk vars
- if ((cp = sfix) != NULL)
- {
- fchalloc = cp->challoc;
- fchsize = cp->ch_size;
- fchptr.cp = cp->chptr + fchsize;
- }
- else
- fchalloc = fchsize = 0;
}
//
void SaveSection(void)
{
- SECT * p = §[cursect];
+ SECT * sp = §[cursect];
- p->scattr = scattr; // Bailout section vars
- p->sloc = sloc;
+ sp->scattr = scattr; // Bailout section vars
+ sp->sloc = sloc;
+ sp->orgaddr = orgaddr;
- if (scode != NULL) // Bailout code chunk
+ if (scode != NULL) // Bailout code chunk (if any)
scode->ch_size = ch_size;
-
- if (sfix != NULL) // Bailout fixup chunk
- sfix->ch_size = fchsize;
}
//
-// Test to see if a location has a fixup sic'd on it. This is used by the
+// Test to see if a location has a fixup set on it. This is used by the
// listing generator to print 'xx's instead of '00's for forward references
//
int fixtest(int sno, uint32_t loc)
{
- PTR fup;
-
// Force update to sect[] variables
StopMark();
- // Hairy, ugly linear search for a mark on our location; the speed doesn't
+ // Ugly linear search for a mark on our location. The speed doesn't
// matter, since this is only done when generating a listing, which is
- // SLOW.
- for(CHUNK * ch=sect[sno].sffix; ch!=NULL; ch=ch->chnext)
+ // SLOW anyway.
+ for(FIXUP * fp=sect[sno].sffix; fp!=NULL; fp=fp->next)
{
- fup.cp = (uint8_t *)ch->chptr;
- uint8_t * fuend = fup.cp + ch->ch_size;
-
- while (fup.cp < fuend)
- {
- uint16_t w = *fup.wp++;
- uint32_t xloc = *fup.lp++ + (int)fusizoffs[w & FUMASK];
- fup.wp += 2;
+ uint32_t w = fp->attr;
+ uint32_t xloc = fp->loc + (int)fusizoffs[w & FUMASK];
- if (xloc == loc)
- return (int)fusiztab[w & FUMASK];
-
- if (w & FU_EXPR)
- {
- w = *fup.wp++;
- fup.lp += w;
- }
- else
- fup.lp++;
- }
+ if (xloc == loc)
+ return (int)fusiztab[w & FUMASK];
}
return 0;
//
// Check that there are at least 'amt' bytes left in the current chunk. If
-// there are not, allocate another chunk of at least 'amt' bytes (and probably
-// more).
+// there are not, allocate another chunk of at least CH_CODE_SIZE bytes or
+// 'amt', whichever is larger.
//
// If 'amt' is zero, ensure there are at least CH_THRESHOLD bytes, likewise.
//
-int chcheck(uint32_t amt)
+void chcheck(uint32_t amt)
{
DEBUG { printf("chcheck(%u)\n", amt); }
+
// If in BSS section, no allocation required
if (scattr & SBSS)
- return 0;
+ return;
- if (!amt)
+ if (amt == 0)
amt = CH_THRESHOLD;
- DEBUG { printf(" challoc=%i, ch_size=%i, diff=%i\n", challoc, ch_size, challoc-ch_size); }
+ 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;
+ return;
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);
+ int first = 0;
- // First chunk in section
if (scode == NULL)
{
+ // First chunk in section
cp->chprev = NULL;
p->sfcode = cp;
+ first = 1;
}
- // Add chunk to other chunks
else
{
+ // Add second and on to previous chunk
cp->chprev = scode;
scode->chnext = cp;
- scode->ch_size = ch_size; // Save old chunk's globals
+ scode->ch_size = ch_size; // Save old chunk's globals
}
// Setup chunk and global vars
- cp->chloc = sloc;
+/*
+So, whenever there's an ORG in a 56K section, it sets sloc TO THE ADDRESS IN THE ORG. Also, the loc/sloc are incremented by 1s, which means to alias correctly to the byte-oriented memory model we have here, we have to fix that kind of crap.
+*/
+ cp->chloc = sloc; // <-- HERE'S THE PROBLEM FOR 56K :-/
cp->chnext = NULL;
challoc = cp->challoc = amt;
ch_size = cp->ch_size = 0;
chptr = cp->chptr = ((uint8_t *)cp) + sizeof(CHUNK);
scode = p->scode = cp;
- return 0;
+ // A quick kludge
+/*
+OK, so this is a bit shite, but at least it gets things working the way they should. The right way to do this is not rely on sloc & friends for the right fixup address but to have an accurate model of the thing. That will probably come with v2.0.1 :-P
+
+So the problem is, d_org sets sloc to the address of the ORG statement, and that gives an incorrect base for the fixup. And so when a second (or later) chunk is allocated, it gets set wrong. Further complicating things is that the orgaddress *does not* get used in a typical way with the DSP56001 code, and, as such, causes incorrect addresses to be generated. All that has to be dealt with in order to get this right and do away with this kludge.
+*/
+ if (((cursect == M56001P) || (cursect == M56001X) || (cursect == M56001Y)) && !first)
+ cp->chloc = cp->chprev->chloc + cp->chprev->ch_size;
+
+ return;
}
-//
-// A fixup record is at least 4 pieces of data long, with some optional data at
-// the end. Is of the form:
-//
-// SYMBOL EXPRESSION
-// ------ ----------
-// FU_EXPR.W FU_EXPR.W fixup type
-// loc.L loc.L location in section
-// fileno.W fileno.W file number fixup occurred in
-// lineno.W lineno.W line number fixup occurred in
-// symbol.* size.W &symbol (32 or 64 bits) / size of expression
-// token.L size (zero or more) TOKENS (32-bits each)
-// ENDEXPR.L End of expression (with size > zero)
-// JR.L Possible ORG address of RISC JR instruction
//
// Arrange for a fixup on a location
//
-int AddFixup(uint16_t attr, uint32_t loc, TOKEN * fexpr)
+int AddFixup(uint32_t attr, uint32_t loc, TOKEN * fexpr)
{
- uint32_t i = MIN_FIXUP_MEM;
- uint16_t len = 0;
-
- DEBUG printf("FIXUP@$%X: $%X\n", loc, attr);
+ uint16_t exprlen = 0;
+ SYM * symbol = NULL;
+ uint32_t _orgaddr = 0;
- // Compute length of expression (could be faster); determine if it's the
- // single-symbol case; no expression if it's just a mark. (? is this true?)
- if ((*fexpr == SYMBOL) && (fexpr[2] == ENDEXPR))
+ // First, check to see if the expression is a bare label, otherwise, force
+ // the FU_EXPR flag into the attributes and count the tokens.
+ if ((fexpr[0] == SYMBOL) && (fexpr[2] == ENDEXPR))
{
- // Just a single symbol, possibly followed by a DWORD
- i += sizeof(SYM *);
+ symbol = symbolPtr[fexpr[1]];
- // SCPCD: Correct bit mask for attr (else other FU_xxx will match)
- // NYAN !
+ // Save the org address for JR RISC instruction
if ((attr & FUMASKRISC) == FU_JR)
- i += sizeof(uint32_t);
+ _orgaddr = orgaddr;
}
else
{
attr |= FU_EXPR;
-
- // Count the # of tokens in the expression
- for(len=0; fexpr[len]!=ENDEXPR; len++)
- {
- // Add one to len for 2X tokens, two for 3X tokens
- if (fexpr[len] == SYMBOL)
- len++;
- else if (fexpr[len] == CONST)
- len += 2;
- }
-
- // Add 1 for ENDEXPR
- len++;
- i += sizeof(uint16_t) + (len * sizeof(TOKEN));
+ exprlen = ExpressionLength(fexpr);
}
- // Alloc another fixup chunk for this one to fit in if necessary
- if ((fchalloc - fchsize) < i)
+ // Second, check to see if it's a DSP56001 fixup, and force the FU_56001
+ // flag into the attributes if so; also save the current org address.
+ if (attr & FUMASKDSP)
{
- SECT * p = §[cursect];
- CHUNK * cp = (CHUNK *)malloc(sizeof(CHUNK) + CH_FIXUP_SIZE);
-
- // First fixup chunk in section
- if (sfix == NULL)
- {
- cp->chprev = NULL;
- p->sffix = cp;
- }
- // Add to other chunks
- else
- {
- cp->chprev = sfix;
- sfix->chnext = cp;
- sfix->ch_size = fchsize;
- }
-
- // Setup fixup chunk and its global vars
- cp->chnext = NULL;
- fchalloc = cp->challoc = CH_FIXUP_SIZE;
- fchsize = cp->ch_size = 0;
- fchptr.cp = cp->chptr = ((uint8_t *)cp) + sizeof(CHUNK);
- sfix = p->sfix = cp;
+ attr |= FU_56001;
+ // Save the exact spot in this chunk where the fixup should go
+ _orgaddr = chptr - scode->chptr + scode->chloc;
}
- // Record fixup type, fixup location, and the file number and line number
- // the fixup is located at.
- *fchptr.wp++ = attr;
- *fchptr.lp++ = loc;
- *fchptr.wp++ = cfileno;
- *fchptr.wp++ = curlineno;
-
- // Store postfix expression or pointer to a single symbol, or nothing for a
- // mark (a zero word is stored in this case--[? is it?]).
- if (attr & FU_EXPR)
+ // Allocate space for the fixup + any expression
+ FIXUP * fixup = malloc(sizeof(FIXUP) + (sizeof(TOKEN) * exprlen));
+
+ // Store the relevant fixup information in the FIXUP
+ fixup->next = NULL;
+ fixup->attr = attr;
+ fixup->loc = loc;
+ fixup->fileno = cfileno;
+ fixup->lineno = curlineno;
+ fixup->expr = NULL;
+ fixup->symbol = symbol;
+ fixup->orgaddr = _orgaddr;
+
+ // Copy the passed in expression to the FIXUP, if any
+ if (exprlen > 0)
{
- *fchptr.wp++ = len;
+ fixup->expr = (TOKEN *)((uint8_t *)fixup + sizeof(FIXUP));
+ memcpy(fixup->expr, fexpr, sizeof(TOKEN) * exprlen);
+ }
- while (len--)
- *fchptr.lp++ = *fexpr++;
+ // Finally, put the FIXUP in the current section's linked list
+ if (sect[cursect].sffix == NULL)
+ {
+ sect[cursect].sffix = fixup;
+ sect[cursect].sfix = fixup;
}
else
{
- *fchptr.sy++ = symbolPtr[fexpr[1]];
+ sect[cursect].sfix->next = fixup;
+ sect[cursect].sfix = fixup;
+ }
- // SCPCD: Correct bit mask for attr (else other FU_xxx will match)
- // NYAN !
- if ((attr & FUMASKRISC) == FU_JR)
- {
- if (orgactive)
- *fchptr.lp++ = orgaddr;
- else
- *fchptr.lp++ = 0x00000000;
- }
+ DEBUG { printf("AddFixup: sno=%u, l#=%u, attr=$%X, loc=$%X, expr=%p, sym=%p, org=$%X\n", cursect, fixup->lineno, fixup->attr, fixup->loc, (void *)fixup->expr, (void *)fixup->symbol, fixup->orgaddr);
+ if (symbol != NULL)
+ printf(" name: %s, value: $%lX\n", symbol->sname, symbol->svalue);
}
- fchsize += i;
return 0;
}
//
-// Resolve fixups in a section
+// Resolve fixups in the passed in section
//
int ResolveFixups(int sno)
{
- PTR fup; // Current fixup
- uint64_t eval; // Expression value
- SYM * sy; // (Temp) pointer to a symbol
- uint16_t i; // (Temp) word
- int reg2;
- uint16_t flags;
-
SECT * sc = §[sno];
- CHUNK * ch = sc->sffix;
-
- if (ch == NULL)
- return 0;
// "Cache" first chunk
CHUNK * cch = sc->sfcode;
if (sno == M6502)
cch->ch_size = cch->challoc;
- do
+ // Get first fixup for the passed in section
+ FIXUP * fixup = sect[sno].sffix;
+
+ while (fixup != NULL)
{
- fup.cp = ch->chptr; // fup -> start of chunk
- uint16_t * fuend = (uint16_t *)(fup.cp + ch->ch_size); // fuend -> end of chunk
+ // We do it this way because we have continues everywhere... :-P
+ FIXUP * fup = fixup;
+ fixup = fixup->next;
+
+ uint32_t dw = fup->attr; // Fixup long (type + modes + flags)
+ uint32_t loc = fup->loc; // Location to fixup
+ cfileno = fup->fileno;
+ curlineno = fup->lineno;
+ DEBUG { printf("ResolveFixups: sect#=%u, l#=%u, attr=$%X, loc=$%X, expr=%p, sym=%p, org=$%X\n", sno, fup->lineno, fup->attr, fup->loc, (void *)fup->expr, (void *)fup->symbol, fup->orgaddr); }
+
+ // 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();
+
+ if ((sno == M56001P) || (sno == M56001X) || (sno == M56001Y) || (sno == M56001L))
+ loc = fup->orgaddr;
+
+ // Search for chunk containing location to fix up; compute a
+ // pointer to the location (in the chunk). Often we will find the
+ // Fixup is in the "cached" chunk, so the linear-search is seldom
+ // executed.
+ if (loc < cch->chloc || loc >= (cch->chloc + cch->ch_size))
+ {
+ for(cch=sc->sfcode; cch!=NULL; cch=cch->chnext)
+ {
+ if (loc >= cch->chloc && loc < (cch->chloc + cch->ch_size))
+ break;
+ }
+
+ if (cch == NULL)
+ {
+ // Fixup (loc) is out of range--this should never happen!
+ // Once we call this function, it winds down immediately; it
+ // doesn't return.
+ interror(7);
+ }
+ }
+
+ // Location to fix (in current chunk)
+ // We use the address of the chunk that loc is actually in, then
+ // subtract the chunk's starting location from loc to get the offset
+ // into the current chunk.
+ uint8_t * locp = cch->chptr + (loc - cch->chloc);
+
+ uint16_t eattr = 0; // Expression attrib
+ SYM * esym = NULL; // External symbol involved in expr
+ uint64_t eval; // Expression value
+ uint16_t flags; // Mark flags
+
+ // Compute expression/symbol value and attributes
- while (fup.wp < fuend)
+ // Complex expression
+ if (dw & FU_EXPR)
{
- uint16_t w = *fup.wp++; // Fixup word (type+modes+flags)
- uint32_t loc = *fup.lp++; // Location to fixup
- cfileno = *fup.wp++;
- curlineno = *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();
-
- SYM * esym = NULL; // External symbol involved in expr
-
- // Search for chunk containing location to fix up; compute a
- // pointer to the location (in the chunk). Often we will find the
- // Fixup is in the "cached" chunk, so the linear-search is seldom
- // executed.
- if (loc < cch->chloc || loc >= (cch->chloc + cch->ch_size))
+ // evexpr presumably issues the errors/warnings here
+ if (evexpr(fup->expr, &eval, &eattr, &esym) != OK)
+ continue;
+ }
+ // Simple symbol
+ else
+ {
+ SYM * sy = fup->symbol;
+ eattr = sy->sattr;
+
+ if (eattr & DEFINED)
+ eval = sy->svalue;
+ else
+ eval = 0;
+
+ // If the symbol is not defined, but global, set esym to sy
+ if ((eattr & (GLOBAL | DEFINED)) == GLOBAL)
+ esym = sy;
+
+ DEBUG { printf(" name: %s, value: $%" PRIX64 "\n", sy->sname, sy->svalue); }
+ }
+
+ uint16_t tdb = eattr & TDB;
+
+ // If the expression/symbol is undefined and no external symbol is
+ // involved, then that's an error.
+ if (!(eattr & DEFINED) && (esym == NULL))
+ {
+ error(undef_error);
+ continue;
+ }
+
+ // Do the fixup
+ //
+ // If a PC-relative fixup is undefined, its value is *not* subtracted
+ // from the location (that will happen in the linker when the external
+ // reference is resolved).
+ //
+ // MWC expects PC-relative things to have the LOC subtracted from the
+ // value, if the value is external (that is, undefined at this point).
+ //
+ // PC-relative fixups must be DEFINED and either in the same section
+ // (whereupon the subtraction takes place) or ABS (with no subtract).
+ if ((dw & FU_PCREL) || (dw & FU_PCRELX))
+ {
+ if (eattr & DEFINED)
{
- for(cch=sc->sfcode; cch!=NULL; cch=cch->chnext)
+ if (tdb == sno)
{
- if (loc >= cch->chloc && loc < (cch->chloc + cch->ch_size))
- break;
- }
+ eval -= loc;
- if (cch == NULL)
+ // In this instruction the PC is located a DWORD away
+ if (dw & FU_PCRELX)
+ eval += 2;
+ }
+ else if (tdb)
{
- // Fixup (loc) out of range
- interror(7);
- // NOTREACHED
+ // Allow cross-section PCREL fixups in Alcyon mode
+ if (prg_flag)
+ {
+ switch (tdb)
+ {
+ case TEXT:
+// Shouldn't there be a break here, since otherwise, it will point to the DATA section?
+// break;
+ case DATA:
+ eval += sect[TEXT].sloc;
+ break;
+ case BSS:
+ eval += sect[TEXT].sloc + sect[DATA].sloc;
+ break;
+ default:
+ error("invalid section");
+ break;
+ }
+
+ eval -= loc;
+
+ // In this instruction the PC is located a DWORD away
+ if (dw & FU_PCRELX)
+ eval += 2;
+ }
+ else
+ {
+ error("PC-relative expr across sections");
+ continue;
+ }
}
+
+ if (sbra_flag && (dw & FU_LBRA) && (eval + 0x80 < 0x100))
+ warn("unoptimized short branch");
}
+ else if (obj_format == MWC)
+ {
+ eval -= loc;
- // Location to fix (in cached chunk)
- uint8_t * locp = cch->chptr + (loc - cch->chloc);
- uint16_t eattr = 0; // Expression attrib
+ // In this instruction the PC is located a DWORD away
+ if (dw & FU_PCRELX)
+ eval += 2;
+ }
- // Compute expression/symbol value and attribs
+ // Be sure to clear any TDB flags, since we handled it just now
+ tdb = 0;
+ eattr &= ~TDB;
+ }
- // Complex expression
- if (w & FU_EXPR)
+ // Handle fixup classes
+ switch (dw & FUMASK)
+ {
+ // FU_BBRA fixes up a one-byte branch offset.
+ case FU_BBRA:
+ if (!(eattr & DEFINED))
{
- i = *fup.wp++;
+ error("external short branch");
+ continue;
+ }
+
+ eval -= 2;
+
+ if (eval + 0x80 >= 0x100)
+ goto rangeErr;
- if (evexpr(fup.tk, &eval, &eattr, &esym) != OK)
+ if (eval == 0)
+ {
+ if (CHECK_OPTS(OPT_NULL_BRA))
{
- fup.lp += i;
+ // Just output a NOP
+ *locp++ = 0x4E;
+ *locp = 0x71;
+ continue;
+ }
+ else
+ {
+ error("illegal bra.s with zero offset");
continue;
}
-
- fup.lp += i;
}
- // Simple symbol
- else
- {
- sy = *fup.sy++;
- eattr = sy->sattr;
- if (eattr & DEFINED)
- eval = sy->svalue;
- else
- eval = 0;
+ *++locp = (uint8_t)eval;
+ break;
- // If the symbol is not defined, but global, set esym to sy
- if ((eattr & (GLOBAL | DEFINED)) == GLOBAL)
- esym = sy;
- }
+ // Fixup one-byte value at locp + 1.
+ case FU_WBYTE:
+ locp++;
+ // FALLTHROUGH
- uint16_t tdb = eattr & TDB;
+ // Fixup one-byte forward references
+ case FU_BYTE:
+ if (!(eattr & DEFINED))
+ {
+ error("external byte reference");
+ continue;
+ }
- // If the expression is undefined and no external symbol is
- // involved, then that's an error.
- if (!(eattr & DEFINED) && (esym == NULL))
+ if (tdb)
{
- error(undef_error);
+ error("non-absolute byte reference");
continue;
}
- // Do the fixup
- //
- // If a PC-relative fixup is undefined, its value is *not*
- // subtracted from the location (that will happen in the linker
- // when the external reference is resolved).
- //
- // MWC expects PC-relative things to have the LOC subtracted from
- // the value, if the value is external (that is, undefined at this
- // point).
- //
- // PC-relative fixups must be DEFINED and either in the same
- // section (whereupon the subtraction takes place) or ABS (with no
- // subtract).
- if (w & FU_PCREL)
+ if ((dw & FU_PCREL) && ((eval + 0x80) >= 0x100))
+ goto rangeErr;
+
+ if (dw & FU_SEXT)
{
- if (eattr & DEFINED)
- {
- if (tdb == sno)
- eval -= (uint32_t)loc;
- else if (tdb)
- {
- error("PC-relative expr across sections");
- continue;
- }
+ if ((eval + 0x100) >= 0x200)
+ goto rangeErr;
+ }
+ else if (eval >= 0x100)
+ goto rangeErr;
- if (sbra_flag && (w & FU_LBRA) && (eval + 0x80 < 0x100))
- warn("unoptimized short branch");
- }
- else if (obj_format == MWC)
- eval -= (uint32_t)loc;
+ *locp = (uint8_t)eval;
+ break;
- tdb = 0;
- eattr &= ~TDB;
+ // Fixup high/low byte off word for 6502
+ case FU_BYTEH:
+ if (!(eattr & DEFINED))
+ {
+ error("external byte reference");
+ continue;
}
- // Do fixup classes
- switch (w & FUMASK)
+ *locp = (uint8_t)(eval >> 8);
+ break;
+
+ case FU_BYTEL:
+ if (!(eattr & DEFINED))
{
- // FU_BBRA fixes up a one-byte branch offset.
- case FU_BBRA:
- if (!(eattr & DEFINED))
- {
- error("external short branch");
- continue;
- }
+ error("external byte reference");
+ continue;
+ }
- eval -= 2;
+ *locp = (uint8_t)eval;
+ break;
- if (eval + 0x80 >= 0x100)
- goto rangeErr;
+ // Fixup WORD forward references; the word could be unaligned in the
+ // section buffer, so we have to be careful. (? careful about what?)
+ case FU_WORD:
+ if ((dw & FUMASKRISC) == FU_JR)
+ {
+ int reg = (signed)((eval - ((fup->orgaddr ? fup->orgaddr : loc) + 2)) / 2);
- if (eval == 0)
+ if ((reg < -16) || (reg > 15))
{
- error("illegal bra.s with zero offset");
- continue;
+ error("relative jump out of range");
+ break;
}
- *++locp = (uint8_t)eval;
- break;
- // Fixup one-byte value at locp + 1.
- case FU_WBYTE:
+ *locp |= ((uint8_t)reg >> 3) & 0x03;
locp++;
- // FALLTHROUGH
- // Fixup one-byte forward references
- case FU_BYTE:
- if (!(eattr & DEFINED))
+ *locp |= ((uint8_t)reg & 0x07) << 5;
+ break;
+ }
+ else if ((dw & FUMASKRISC) == FU_NUM15)
+ {
+ if (((int)eval < -16) || ((int)eval > 15))
{
- error("external byte reference");
- continue;
+ error("constant out of range (-16 - +15)");
+ break;
}
- if (tdb)
+ *locp |= ((uint8_t)eval >> 3) & 0x03;
+ locp++;
+ *locp |= ((uint8_t)eval & 0x07) << 5;
+ break;
+ }
+ else if ((dw & FUMASKRISC) == FU_NUM31)
+ {
+ if (eval > 31)
{
- error("non-absolute byte reference");
- continue;
+ error("constant out of range (0-31)");
+ break;
}
- if ((w & FU_PCREL) && eval + 0x80 >= 0x100)
- goto rangeErr;
-
- if (w & FU_SEXT)
+ *locp |= ((uint8_t)eval >> 3) & 0x03;
+ locp++;
+ *locp |= ((uint8_t)eval & 0x07) << 5;
+ break;
+ }
+ else if ((dw & FUMASKRISC) == FU_NUM32)
+ {
+ if ((eval < 1) || (eval > 32))
{
- if (eval + 0x100 >= 0x200)
- goto rangeErr;
+ error("constant out of range (1-32)");
+ break;
}
- else if (eval >= 0x100)
- goto rangeErr;
- *locp = (uint8_t)eval;
+ if (dw & FU_SUB32)
+ eval = (32 - eval);
+
+ eval = (eval == 32) ? 0 : eval;
+ *locp |= ((uint8_t)eval >> 3) & 0x03;
+ locp++;
+ *locp |= ((uint8_t)eval & 0x07) << 5;
break;
- // Fixup high/low byte off word for 6502
- case FU_BYTEH:
- if (!(eattr & DEFINED))
+ }
+ else if ((dw & FUMASKRISC) == FU_REGONE)
+ {
+ if (eval > 31)
{
- error("external byte reference");
- continue;
+ error("register one value out of range");
+ break;
}
- *locp = (uint8_t)((eval >> 8) & 0xFF);
+ *locp |= ((uint8_t)eval >> 3) & 0x03;
+ locp++;
+ *locp |= ((uint8_t)eval & 0x07) << 5;
break;
- case FU_BYTEL:
- if (!(eattr & DEFINED))
+ }
+ else if ((dw & FUMASKRISC) == FU_REGTWO)
+ {
+ if (eval > 31)
{
- error("external byte reference");
- continue;
+ error("register two value out of range");
+ break;
}
- *locp = (uint8_t)(eval & 0xFF);
+ locp++;
+ *locp |= (uint8_t)eval & 0x1F;
break;
- // Fixup WORD forward references;
- // the word could be unaligned in the section buffer, so we have to
- // be careful.
- case FU_WORD:
- if ((w & FUMASKRISC) == FU_JR)
- {
- uint32_t orgaddr = *fup.lp++;
+ }
- if (orgaddr)
- reg2 = (signed)((eval - (orgaddr + 2)) / 2);
- else
- reg2 = (signed)((eval - (loc + 2)) / 2);
+ if (!(eattr & DEFINED))
+ {
+ flags = MWORD;
- if ((reg2 < -16) || (reg2 > 15))
- {
- error("relative jump out of range");
- break;
- }
+ if (dw & FU_PCREL)
+ flags |= MPCREL;
- *locp = (uint8_t)(*locp | ((reg2 >> 3) & 0x03));
- locp++;
- *locp = (uint8_t)(*locp | ((reg2 & 0x07) << 5));
- break;
- }
+ MarkRelocatable(sno, loc, 0, flags, esym);
+ }
+ else
+ {
+ if (tdb)
+ MarkRelocatable(sno, loc, tdb, MWORD, NULL);
- if ((w & FUMASKRISC) == FU_NUM15)
+ if (dw & FU_SEXT)
{
- if (eval < -16 || eval > 15)
- {
- error("constant out of range");
- break;
- }
-
- *locp = (uint8_t)(*locp | ((eval >> 3) & 0x03));
- locp++;
- *locp = (uint8_t)(*locp | ((eval & 0x07) << 5));
- break;
+ if (eval + 0x10000 >= 0x20000)
+ goto rangeErr;
}
-
- if ((w & FUMASKRISC) == FU_NUM31)
+ else
{
- if (eval < 0 || eval > 31)
+ // Range-check BRA and DBRA
+ if (dw & FU_ISBRA)
{
- error("constant out of range");
- break;
+ if (eval + 0x8000 >= 0x10000)
+ goto rangeErr;
}
-
- *locp = (uint8_t)(*locp | ((eval >> 3) & 0x03));
- locp++;
- *locp = (uint8_t)(*locp | ((eval & 0x07) << 5));
- break;
+ else if (eval >= 0x10000)
+ goto rangeErr;
}
+ }
- if ((w & FUMASKRISC) == FU_NUM32)
- {
- if (eval < 1 || eval > 32)
- {
- error("constant out of range");
- break;
- }
+ // 6502 words are little endian, so handle that here
+ if (sno == M6502)
+ SETLE16(locp, 0, eval)
+ else
+ SETBE16(locp, 0, eval)
+
+ break;
+
+ // Fixup LONG forward references; the long could be unaligned in the
+ // section buffer, so be careful (again).
+ case FU_LONG:
+ flags = MLONG;
+
+ if ((dw & FUMASKRISC) == FU_MOVEI)
+ {
+ // Long constant in MOVEI # is word-swapped, so fix it here
+ eval = WORDSWAP32(eval);
+ flags |= MMOVEI;
+ }
+
+ // If the symbol is undefined, make sure to pass the symbol in
+ // to the MarkRelocatable() function.
+ if (!(eattr & DEFINED))
+ MarkRelocatable(sno, loc, 0, flags, esym);
+ else if (tdb)
+ MarkRelocatable(sno, loc, tdb, flags, NULL);
+
+ SETBE32(locp, 0, eval);
+ break;
+
+ // Fixup QUAD forward references (mainly used by the OP assembler)
+ case FU_QUAD:
+ if (dw & FU_OBJLINK)
+ {
+ uint64_t quad = GETBE64(locp, 0);
+ uint64_t addr = eval;
- if (w & FU_SUB32)
- eval = (32 - eval);
+//Hmm, not sure how this can be set, since it's only set if it's a DSP56001 fixup or a FU_JR... :-/
+// if (fup->orgaddr)
+// addr = fup->orgaddr;
- eval = (eval == 32) ? 0 : eval;
- *locp = (uint8_t)(*locp | ((eval >> 3) & 0x03));
- locp++;
- *locp = (uint8_t)(*locp | ((eval & 0x07) << 5));
+ eval = (quad & 0xFFFFFC0000FFFFFFLL) | ((addr & 0x3FFFF8) << 21);
+ }
+ else if (dw & FU_OBJDATA)
+ {
+ // If it's in a TEXT or DATA section, be sure to mark for a
+ // fixup later
+ if (tdb)
+ MarkRelocatable(sno, loc, tdb, MQUAD, NULL);
+
+ uint64_t quad = GETBE64(locp, 0);
+ uint64_t addr = eval;
+
+//Hmm, not sure how this can be set, since it's only set if it's a DSP56001 fixup or a FU_JR... :-/
+// if (fup->orgaddr)
+// addr = fup->orgaddr;
+
+ eval = (quad & 0x000007FFFFFFFFFFLL) | ((addr & 0xFFFFF8) << 40);
+ }
+
+ SETBE64(locp, 0, 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:
+ if (!(eattr & DEFINED))
+ {
+ error("External quick reference");
+ continue;
+ }
+
+ if ((eval < 1) || (eval > 8))
+ goto rangeErr;
+
+ *locp |= (eval & 7) << 1;
+ break;
+
+ // Fix up 6502 funny branch
+ case FU_6BRA:
+ eval -= (loc + 1);
+
+ if (eval + 0x80 >= 0x100)
+ goto rangeErr;
+
+ *locp = (uint8_t)eval;
+ break;
+
+ // Fixup DSP56001 addresses
+ case FU_56001:
+ switch (dw & FUMASKDSP)
+ {
+ // DSPIMM5 actually is clamped from 0 to 23 for our purposes
+ // and does not use the full 5 bit range.
+ case FU_DSPIMM5:
+ if (eval > 23)
+ {
+ error("immediate value must be between 0 and 23");
break;
}
- if ((w & FUMASKRISC) == FU_REGONE)
- {
- if (eval < 0 || eval > 31)
- {
- error("register value out of range");
- break;
- }
+ locp[2] |= eval;
+ break;
- *locp = (uint8_t)(*locp | ((eval >> 3) & 0x03));
- locp++;
- *locp = (uint8_t)(*locp | ((eval & 0x07) << 5));
+ // This is a 12-bit address encoded into the lower 12
+ // bits of a DSP word
+ case FU_DSPADR12:
+ if (eval >= 0x1000)
+ {
+ error("address out of range ($0-$FFF)");
break;
}
- if ((w & FUMASKRISC) == FU_REGTWO)
- {
- if (eval < 0 || eval > 31)
- {
- error("register value out of range");
- break;
- }
+ locp[1] |= eval >> 8;
+ locp[2] = eval & 0xFF;
+ break;
- locp++;
- *locp = (uint8_t)(*locp | (eval & 0x1F));
+ // This is a full DSP word containing Effective Address Extension
+ case FU_DSPADR24:
+ case FU_DSPIMM24:
+ if (eval >= 0x1000000)
+ {
+ error("value out of range ($0-$FFFFFF)");
break;
}
- if (!(eattr & DEFINED))
+ locp[0] = (uint8_t)((eval >> 16) & 0xFF);
+ locp[1] = (uint8_t)((eval >> 8) & 0xFF);
+ locp[2] = (uint8_t)(eval & 0xFF);
+ break;
+
+ // This is a 16bit absolute address into a 24bit field
+ case FU_DSPADR16:
+ if (eval >= 0x10000)
{
- flags = MWORD;
+ error("address out of range ($0-$FFFF)");
+ break;
+ }
- if (w & FU_PCREL)
- flags |= MPCREL;
+ locp[1] = (uint8_t)(eval >> 8);
+ locp[2] = (uint8_t)eval;
+ break;
- MarkRelocatable(sno, loc, 0, flags, esym);
- }
- else
+ // This is 12-bit immediate short data
+ // The upper nibble goes into the last byte's low nibble
+ // while the remainder 8 bits go into the 2nd byte.
+ case FU_DSPIMM12:
+ if (eval >= 0x1000)
{
- if (tdb)
- MarkRelocatable(sno, loc, tdb, MWORD, NULL);
-
- if (w & FU_SEXT)
- {
- if (eval + 0x10000 >= 0x20000)
- goto rangeErr;
- }
- else
- {
- // Range-check BRA and DBRA
- if (w & FU_ISBRA)
- {
- if (eval + 0x8000 >= 0x10000)
- goto rangeErr;
- }
- else if (eval >= 0x10000)
- goto rangeErr;
- }
+ error("immediate out of range ($0-$FFF)");
+ break;
}
- // 6502 words are little endian, so handle that here
- if (sno == M6502)
- SETLE16(locp, 0, eval)
- else
- SETBE16(locp, 0, eval)
-
+ locp[1] = (uint8_t)eval;
+ locp[2] |= (uint8_t)(eval >> 8);
break;
- // Fixup LONG forward references;
- // the long could be unaligned in the section buffer, so be careful
- // (again).
- case FU_LONG:
- flags = MLONG;
- if ((w & FUMASKRISC) == FU_MOVEI)
+ // This is 8-bit immediate short data
+ // which goes into the middle byte of a DSP word.
+ case FU_DSPIMM8:
+ if (eval >= 0x100)
{
- // Long constant in MOVEI # is word-swapped, so fix it here
- eval = WORDSWAP32(eval);
- flags |= MMOVEI;
+ error("immediate out of range ($0-$FF)");
+ break;
}
- // If the symbol is undefined, make sure to pass the symbol in
- // to the MarkRelocatable() function.
- if (!(eattr & DEFINED))
- MarkRelocatable(sno, loc, 0, flags, esym);
- else if (tdb)
- MarkRelocatable(sno, loc, tdb, flags, NULL);
-
- SETBE32(locp, 0, eval);
+ locp[1] = (uint8_t)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:
- if (!(eattr & DEFINED))
+ // This is a 6 bit absoulte short address. It occupies
+ // the low 6 bits of the middle byte of a DSP word.
+ case FU_DSPADR06:
+ if (eval > 63)
{
- error("External quick reference");
- continue;
+ error("address must be between 0 and 63");
+ break;
}
- if (eval < 1 || eval > 8)
- goto rangeErr;
+ locp[1] |= eval;
+ break;
- *locp |= (eval & 7) << 1;
+ // This is a 6 bit absoulte short address. It occupies
+ // the low 6 bits of the middle byte of a DSP word.
+ case FU_DSPPP06:
+ if (eval < 0xFFFFFFC0)
+ {
+ error("address must be between $FFC0 and $FFFF");
+ break;
+ }
+
+ locp[1] |= eval & 0x3F;
break;
- // Fix up 6502 funny branch
- case FU_6BRA:
- eval -= (loc + 1);
+ // Shamus: I'm pretty sure these don't make any sense...
+ case FU_DSPIMMFL8:
+ warn("FU_DSPIMMFL8 missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
+ break;
- if (eval + 0x80 >= 0x100)
- goto rangeErr;
+ case FU_DSPIMMFL16:
+ warn("FU_DSPIMMFL16 missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
+ break;
- *locp = (uint8_t)eval;
+ case FU_DSPIMMFL24:
+ warn("FU_DSPIMMFL24 missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
break;
+ // Bad fixup type--this should *never* happen!
default:
- // Bad fixup type--this should *never* happen!
interror(4);
// NOTREACHED
}
- continue;
-rangeErr:
- error("expression out of range");
+ break;
+
+ // Fixup a 4-byte float
+ case FU_FLOATSING:
+ warn("FU_FLOATSING missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
+ break;
+
+ // Fixup a 8-byte float
+ case FU_FLOATDOUB:
+ warn("FU_FLOATDOUB missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
+ break;
+
+ // Fixup a 12-byte float
+ case FU_FLOATEXT:
+ warn("FU_FLOATEXT missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
+ break;
+
+ default:
+ // Bad fixup type--this should *never* happen!
+ // Once we call this function, it winds down immediately; it
+ // doesn't return.
+ interror(4);
}
- ch = ch->chnext;
+ continue;
+rangeErr:
+ error("expression out of range");
}
- while (ch != NULL);
return 0;
}
+
//
// Resolve all fixups
//
DEBUG printf("Resolving DATA sections...\n");
ResolveFixups(DATA);
DEBUG printf("Resolving 6502 sections...\n");
- ResolveFixups(M6502); /* fixup 6502 section (if any) */
+ ResolveFixups(M6502); // Fixup 6502 section (if any)
+ DEBUG printf("Resolving DSP56001 P: sections...\n");
+ ResolveFixups(M56001P); // Fixup 56001 P: section (if any)
+ DEBUG printf("Resolving DSP56001 X: sections...\n");
+ ResolveFixups(M56001X); // Fixup 56001 X: section (if any)
+ DEBUG printf("Resolving DSP56001 Y: sections...\n");
+ ResolveFixups(M56001Y); // Fixup 56001 Y: section (if any)
return 0;
}
projects / rmac / blobdiff