1
0
mirror of https://github.com/dschmenk/PLASMA.git synced 2026-01-26 13:16:25 +00:00
Files
PLASMA/src/toolsrc/codegen.pla
2025-01-19 07:43:43 -08:00

1041 lines
26 KiB
Plaintext

//
// Address tags
//
def new_tag(type)
tag_cnt++
if tag_cnt >= tag_num; exit_err(ERR_OVER|ERR_CODE|ERR_TABLE); fin
tag_addr=>[tag_cnt] = 0 // Unresolved, nothing to update yet
tag_type->[tag_cnt] = type
return tag_cnt
end
//
// New/release sequence ops
//
def new_op
word op
op = freeop_lst
if not op
puts("Compiler out of sequence ops!")
return NULL
fin
freeop_lst = freeop_lst=>opnext
op=>opnext = NULL
return op
end
def release_op(op)#0
if op
op=>opnext = freeop_lst
freeop_lst = op
fin
end
def release_seq(seq)#0
word op
while seq
op = seq
seq = seq=>opnext
//
//Free this op
//
op=>opnext = freeop_lst
freeop_lst = op
loop
end
//
// Append one sequence to the end of another
//
def cat_seq(seq1, seq2)
word op
if not seq1; return seq2; fin
op = seq1
while op=>opnext; op = op=>opnext; loop
op=>opnext = seq2
return seq1
end
//
// Emit data/bytecode
//
def emit_byte(bval)#0
^codeptr = bval
codeptr++
if isugt(codeptr - codebuff, codebufsz); exit_err(ERR_OVER|ERR_CODE|ERR_TABLE); fin
end
def emit_word(wval)#0
*codeptr = wval
codeptr = codeptr + 2
if isugt(codeptr - codebuff, codebufsz); exit_err(ERR_OVER|ERR_CODE|ERR_TABLE); fin
end
def emit_fill(size)#0
memset(codeptr, 0, size)
codeptr = codeptr + size
if isugt(codeptr - codebuff, codebufsz); exit_err(ERR_OVER|ERR_CODE|ERR_TABLE); fin
end
def emit_addr(tag, offset)#0
if tag_type->[tag] & RELATIVE_FIXUP; puts("Global fixup to relative tag"); exit_err(0); fin // DEBUG
fixup_tag=>[fixup_cnt] = tag
fixup_addr=>[fixup_cnt] = codeptr
fixup_cnt++
if fixup_cnt >= fixup_num; exit_err(ERR_OVER|ERR_ID|ERR_TABLE); fin
emit_word(offset + tag_addr=>[tag])
end
def emit_reladdr(tag)#0
word updtptr
if not (tag_type->[tag] & RELATIVE_FIXUP); puts("Not relative tag fixup"); exit_err(0); fin // DEBUG
if tag_type->[tag] & RESOLVED_FIXUP
updtptr = tag_addr=>[tag] - codeptr
else
//
// Add to list of tags needing resolution
//
updtptr = tag_addr=>[tag]
tag_addr=>[tag] = codeptr
fin
emit_word(updtptr)
end
def emit_data(vartype, consttype, constval, constsize)
byte type
word size, chrptr
if consttype == 0
size = constsize
emit_fill(constsize)
elsif consttype == STR_TYPE
constsize = ^constval
size = constsize + 1
chrptr = constval + 1
emit_byte(constsize)
while constsize > 0
emit_byte(^chrptr)
chrptr++
constsize--
loop
elsif consttype == CONSTADDR_TYPE
size = 2
emit_addr(constval, 0)
else
if vartype & BYTE_TYPE
size = 1
emit_byte(constval)
else
size = 2
emit_word(constval)
fin
fin
return size
end
def emit_codeseg#0
if lastglobalsize == 0
emit_byte($00) // Pad byte between last data tag and code seg
datasize++
fin
end
def emit_const(cval)#0
emit_pending_seq
if cval == $FFFF // MINUS ONE
emit_byte($20)
elsif cval & $FFF0 == $0000 // Constant NYBBLE
emit_byte(cval*2)
elsif cval & $FF00 == $0000 // Constant BYTE
emit_byte($2A)
emit_byte(cval)
elsif cval & $FF00 == $FF00 // Constant $FF00 | BYTE
emit_byte($5E)
emit_byte(cval)
else // Constant WORD
emit_byte($2C)
emit_word(cval)
fin
end
def emit_code(bval)#0
emit_pending_seq
^codeptr = bval
codeptr++
if isugt(codeptr - codebuff, codebufsz); exit_err(ERR_OVER|ERR_CODE|ERR_TABLE); fin
end
def emit_slb(offset)#0
emit_pending_seq
emit_byte($74)
emit_byte(offset)
end
def emit_slw(offset)#0
emit_pending_seq
emit_byte($76)
emit_byte(offset)
end
def emit_sab(tag, offset)#0
emit_pending_seq
emit_byte($78)
emit_addr(tag, offset)
end
def emit_saw(tag, offset)#0
emit_pending_seq
emit_byte($7A)
emit_addr(tag, offset)
end
def emit_dlb(offset)#0
emit_pending_seq
emit_byte($6C)
emit_byte(offset)
end
def emit_dlw(offset)#0
emit_pending_seq
emit_byte($6E)
emit_byte(offset)
end
def emit_dab(tag, offset)#0
emit_pending_seq
emit_byte($7C)
emit_addr(tag, offset)
end
def emit_daw(tag, offset)#0
emit_pending_seq
emit_byte($7E)
emit_addr(tag, offset)
end
def emit_select(tag)#0
emit_pending_seq
emit_byte($52)
emit_reladdr(tag)
end
def emit_caseblock(cnt, oflist, typlist, taglist)#0
byte i
if not cnt or cnt > 256; exit_err(ERR_OVER|ERR_STATE); fin
emit_pending_seq
emit_byte(cnt)
for i = 0 to cnt-1
if typlist=>[i] == CONSTADDR_TYPE
emit_addr(oflist=>[i], 0)
else
emit_word(oflist=>[i])
fin
emit_reladdr(taglist=>[i])
next
end
def emit_branch(tag)#0
emit_pending_seq
emit_byte($50)
emit_reladdr(tag)
end
def emit_brgt(tag)#0
emit_pending_seq
emit_byte($A0)
emit_reladdr(tag)
end
def emit_brlt(tag)#0
emit_pending_seq
emit_byte($A2)
emit_reladdr(tag)
end
def emit_incbrle(tag)#0
emit_pending_seq
emit_byte($A4)
emit_reladdr(tag)
end
def emit_addbrle(tag)#0
emit_pending_seq
emit_byte($A6)
emit_reladdr(tag)
end
def emit_decbrge(tag)#0
emit_pending_seq
emit_byte($A8)
emit_reladdr(tag)
end
def emit_subbrge(tag)#0
emit_pending_seq
emit_byte($AA)
emit_reladdr(tag)
end
def emit_brand(tag)#0
emit_pending_seq
emit_byte($AC)
emit_reladdr(tag)
end
def emit_bror(tag)#0
emit_pending_seq
emit_byte($AE)
emit_reladdr(tag)
end
def emit_leave#0
emit_pending_seq
if framesize
emit_byte($5A)
emit_byte(framesize)
else
emit_byte($5C)
fin
end
def emit_enter(cparms)#0
if framesize
emit_byte($58)
emit_byte(framesize)
emit_byte(cparms)
fin
end
def emit_tag(tag)#0
word fixups, updtptr, nextptr, codeofst
emit_pending_seq
if tag_type->[tag] & RESOLVED_FIXUP; puts("Tag already resolved"); exit_err(0); fin // DEBUG
//
// Update list of addresses needing resolution
//
if tag_type->[tag] & RELATIVE_FIXUP
updtptr = tag_addr=>[tag]
while updtptr
nextptr = *updtptr
*updtptr = codeptr - updtptr
updtptr = nextptr
loop
updtptr = codeptr
else
codeofst = codeptr - codebuff
for fixups = fixup_cnt-1 downto 0
if fixup_tag=>[fixups] == tag
updtptr = fixup_addr=>[fixups]
*updtptr = *updtptr + codeofst
fin
next
updtptr = codeptr - codebuff
fin
tag_addr=>[tag] = updtptr
tag_type->[tag] = tag_type->[tag] | RESOLVED_FIXUP
end
//
// Emit the pending sequence
//
def emit_pending_seq#0
word op, pending
//
// This is called by some of the emit_*() functions to ensure that any
// pending ops are emitted before they emit their own op when they are
// called from the parser. However, this function itself calls some of those
// emit_*() functions to emit instructions from the pending sequence, which
// would cause an infinite loop if we weren't careful. We therefore set
// pending_seq to null on entry and work with a local copy, so if this
// function calls back into itself it is a no-op.
//
if not pending_seq; return; fin
pending = pending_seq; pending_seq = NULL
if outflags & OPTIMIZE
while optimize_seq(@pending, 0); loop
if outflags & OPTIMIZE2
while optimize_seq(@pending, 1); loop
fin
fin
while pending
op = pending
when op->opgroup
//
// Constant value
//
is CONST_GROUP
if op->opcode == CONST_CODE
if op=>opval == $FFFF // MINUS 1
^codeptr = $20
codeptr++
elsif op=>opval & $FFF0 == $0000 // Constant NYBBLE
^codeptr = op->opval*2
codeptr++
elsif op=>opval & $FF00 == $0000 // Constant BYTE
*codeptr = $2A | (op->opval << 8)
codeptr = codeptr + 2
elsif op=>opval & $FF00 == $FF00 // Constant $FF00 | BYTE
*codeptr = $5E | (op->opval << 8)
codeptr = codeptr + 2
else // Constant WORD
codeptr->0 = $2C
codeptr=>1 = op=>opval
codeptr = codeptr + 3
fin
else
*codeptr = op->opcode | (op->opval << 8) // IMMEDIATE BYTE OP
codeptr = codeptr + 2
fin
break
//
// Constant string
//
is CONSTR_GROUP
^codeptr = $2E
codeptr++
emit_data(0, STR_TYPE, op=>opval, 0)
break
//
// Single op codes
//
is STACK_GROUP
^codeptr = op->opcode
codeptr++
break
//
// Local address codes
//
is LOCAL_GROUP
*codeptr = op->opcode | (op->opoffset << 8)
codeptr = codeptr + 2
break
//
// Global address codes
//
is GLOBAL_GROUP
^codeptr = op->opcode
codeptr++
emit_addr(op=>optag, op=>opoffset)
break
//
// Relative address codes
//
is RELATIVE_GROUP
^codeptr = op->opcode
codeptr++
emit_reladdr(op=>optag)
break
//
// Code tags
//
is CODETAG_GROUP
emit_tag(op=>optag)
break
otherwise
return
wend
pending = pending=>opnext;
//
// Free this op
//
op=>opnext = freeop_lst
freeop_lst = op
loop
if isugt(codeptr - codebuff, codebufsz); exit_err(ERR_OVER|ERR_CODE|ERR_TABLE); fin
end
//
// Emit a sequence of ops (into the pending sequence)
//
def emit_seq(seq)#0
word op
byte string
string = FALSE
op = seq
while op
if op->opcode == CONSTR_CODE; string = TRUE; break; fin
op = op=>opnext
loop
pending_seq = cat_seq(pending_seq, seq)
//
// The source code comments in the output are much more logical if we don't
// merge multiple sequences together. There's no value in doing this merging
// if we're not optimizing, and we optionally allow it to be prevented even
// when we are optimizing by specifing the -N (NO_COMBINE) flag.
//
// We must also force output if the sequence includes a CS opcode, as the
// associated 'constant' is only temporarily valid.
//
if not (outflags & (OPTIMIZE|OPTIMIZE2)) or outflags & NO_COMBINE or string
emit_pending_seq
fin
end
//
// Emit lambda function
//
def emit_lambdafunc(tag, cparms, lambda_seq)#0
emit_tag(tag)
framesize = cparms * 2
emit_enter(cparms)
emit_seq(lambda_seq)
emit_leave
end
//
// ID manager
//
def idmatch(nameptr, len, idptr, idcnt)
byte i
if len > ID_LEN; len = ID_LEN; fin
while idcnt
if len == idptr->idname
i = 1; while i <= len and nameptr->[i - 1] == idptr->idname.[i]; i++; loop
//for i = 1 to len
// if nameptr->[i - 1] <> idptr->idname.[i]; break; fin
//next
if i > len; return idptr; fin
fin
idptr = idptr + idptr->idname + t_id
idcnt--
loop
return NULL
end
def lookup_id(nameptr, len)
word idptr
idptr = idmatch(nameptr, len, idlocal_tbl, locals)
if not idptr
idptr = idmatch(nameptr, len, idglobal_tbl, globals)
if idptr
if idptr=>idtype & EXTERN_TYPE
idptr=>idtype = idptr=>idtype | EXTACCESS_TYPE
fin
fin
fin
return idptr
end
def lookup_idglobal(nameptr, len)
word idptr
idptr = idmatch(nameptr, len, idglobal_tbl, globals)
if idptr
if idptr=>idtype & EXTERN_TYPE
idptr=>idtype = idptr=>idtype | EXTACCESS_TYPE
fin
fin
return idptr
end
def new_iddata(nameptr, len, type, size)#0
if idmatch(nameptr, len, idglobal_tbl, globals); exit_err(ERR_DUP|ERR_ID); fin
nametostr(nameptr, len, lastglobal + idname)
lastglobal=>idtype = type
if type & EXTERN_TYPE
lastglobal=>idval = new_tag(EXTERN_FIXUP|WORD_FIXUP)//datasize
else
lastglobal=>idval = new_tag(WORD_FIXUP)//datasize
emit_tag(lastglobal=>idval)
lastglobalsize = size
if size
emit_fill(size)
datasize = datasize + size
fin
fin
globals++
lastglobal = lastglobal + t_id + len
if lastglobal - idglobal_tbl > globalbufsz; exit_err(ERR_OVER|ERR_GLOBAL|ERR_ID|ERR_TABLE); fin
end
def size_iddata(type, varsize, initsize)#0
if varsize > initsize
datasize = datasize + varsize
emit_data(0, 0, 0, varsize - initsize)
else
datasize = datasize + initsize
fin
end
def new_idglobal(nameptr, len, type, value, cparms, cvals)#0
if idmatch(nameptr, len, idglobal_tbl, globals); exit_err(ERR_DUP|ERR_ID); fin
if len > ID_LEN; len = ID_LEN; fin
lastglobal=>idval = value
lastglobal=>idtype = type
lastglobal->funcparms = cparms
lastglobal->funcvals = cvals
nametostr(nameptr, len, lastglobal + idname)
globals++
lastglobal = lastglobal + t_id + len
if lastglobal - idglobal_tbl > globalbufsz; exit_err(ERR_OVER|ERR_GLOBAL|ERR_ID|ERR_TABLE); fin
end
def new_idconst(nameptr, len, value)#0
new_idglobal(nameptr, len, CONST_TYPE, value, 0, 0)
end
def new_idfunc(nameptr, len, type, tag, cfnparms, cfnvals)#0
new_idglobal(nameptr, len, type|FUNC_TYPE, tag, cfnparms, cfnvals)
if not (type & EXTERN_TYPE); def_cnt++; fin
end
def set_idfunc(nameptr, len, tag, cparms, cvals)#0
word idptr
idptr = lookup_idglobal(nameptr, len)
if idptr
if not (idptr=>idtype & FUNC_TYPE); exit_err(ERR_UNDECL|ERR_CODE); fin // DEBUG
idptr=>idval = tag
idptr->funcparms = cparms
idptr->funcvals = cvals
else
exit_err(ERR_UNDECL|ERR_ID)
fin
end
def init_idglobal#0
word op
word i
dfd_num = DFDNUM
tag_num = TAGNUM
fixup_num = FIXUPNUM
globalbufsz = IDGLOBALSZ
localbufsz = IDLOCALSZ
if isult(heapavail, $6000)
dfd_num = DFDNUM/2
tag_num = TAGNUM/2
fixup_num = FIXUPNUM/2
globalbufsz = IDGLOBALSZ-1024
localbufsz = IDLOCALSZ/2
inbuff_len = MAX_INPUT_LEN/2
fin
//
//Init free op sequence list
//
freeop_lst = heapalloc(OPSEQNUM*t_opseq)
op = freeop_lst
for i = OPSEQNUM-1 downto 0
op=>opnext = op + t_opseq
op = op + t_opseq
next
op=>opnext = NULL
//
// Allocate remaining buffers
//
dfd_tag = heapalloc(dfd_num*2)
tag_addr = heapalloc(tag_num*2)
tag_type = heapalloc(tag_num)
fixup_tag = heapalloc(fixup_num*2)
fixup_addr = heapalloc(fixup_num*2)
idglobal_tbl = heapalloc(globalbufsz)
idlocal_tbl = heapalloc(localbufsz)
codebufsz = heapavail - 2048
codebuff = heapalloc(codebufsz)
codeptr = codebuff
lastglobal = idglobal_tbl
end
def new_idlocal(nameptr, len, type, size)#0
if idmatch(nameptr, len, @idlocal_tbl, locals); exit_err(ERR_DUP|ERR_ID); fin
if len > ID_LEN; len = ID_LEN; fin
lastlocal=>idval = framesize
lastlocal=>idtype = type | LOCAL_TYPE
nametostr(nameptr, len, lastlocal + idname)
locals++
lastlocal = lastlocal + t_id + len
if lastlocal - idlocal_tbl > localbufsz; exit_err(ERR_OVER|ERR_LOCAL|ERR_TABLE); fin
framesize = framesize + size
if framesize > 255; exit_err(ERR_OVER|ERR_LOCAL|ERR_FRAME); fin
end
def init_idlocal#0
locals = 0
framesize = 0
lastlocal = idlocal_tbl
end
def save_idlocal#0
savelocals = locals
savesize = framesize
savelast = lastlocal
savetbl = heapalloc(lastlocal - idlocal_tbl)
memcpy(savetbl, idlocal_tbl, lastlocal - idlocal_tbl)
end
def restore_idlocal#0
locals = savelocals
framesize = savesize
lastlocal = savelast
memcpy(idlocal_tbl, savetbl, lastlocal - idlocal_tbl)
heaprelease(savetbl)
end
//
// Module dependency list
//
def new_moddep(nameptr, len)#0
if len > 15; len = 15; fin
new_iddata(nameptr, len, EXTERN_TYPE|WORD_TYPE, 2)
memcpy(@moddep_tbl[moddep_cnt*16] + 1, nameptr, len)
moddep_tbl[moddep_cnt*16] = len
moddep_cnt++
if moddep_cnt > MODDEPNUM; parse_warn("Module dependency overflow"); fin
end
//
// DFD list
//
def new_dfd(tag)#0
if dfd_cnt >= dfd_num; exit_err(ERR_OVER|ERR_CODE|ERR_TABLE); fin
dfd_tag=>[dfd_cnt] = tag
dfd_cnt++
end
//
// Generate/add to a sequence of code
//
def gen_op(seq, code)
word op
if not seq
seq = new_op
op = seq
else
op = seq
while op=>opnext; op = op=>opnext; loop
op=>opnext = new_op
op = op=>opnext
fin
op->opcode = code
op->opgroup = STACK_GROUP
return seq
end
def gen_const(seq, cval)
word op
if not seq
seq = new_op
op = seq
else
op = seq
while op=>opnext; op = op=>opnext; loop
op=>opnext = new_op
op = op=>opnext
fin
op->opcode = CONST_CODE
op->opgroup = CONST_GROUP
op=>opval = cval
return seq
end
def gen_str(seq, cval)
word op
if not seq
seq = new_op
op = seq
else
op = seq
while op=>opnext; op = op=>opnext; loop
op=>opnext = new_op
op = op=>opnext
fin
op->opcode = CONSTR_CODE
op->opgroup = CONSTR_GROUP
op=>opval = cval
return seq
end
def gen_oplcl(seq, code, offsz)
word op
if not seq
seq = new_op
op = seq
else
op = seq
while op=>opnext; op = op=>opnext; loop
op=>opnext = new_op
op = op=>opnext
fin
op->opcode = code
op->opgroup = LOCAL_GROUP
op=>opoffset = offsz
return seq
end
def gen_opglbl(seq, code, tag, offsz)
word op
if not seq
seq = new_op
op = seq
else
op = seq
while op=>opnext; op = op=>opnext; loop
op=>opnext = new_op
op = op=>opnext
fin
op->opcode = code
op->opgroup = GLOBAL_GROUP
op=>optag = tag
op=>opoffset = offsz
return seq
end
def gen_oprel(seq, code, tag)
word op
if not seq
seq = new_op
op = seq
else
op = seq
while op=>opnext; op = op=>opnext; loop
op=>opnext = new_op
op = op=>opnext
fin
op->opcode = code
op->opgroup = RELATIVE_GROUP
op=>optag = tag
return seq
end
def gen_ctag(seq, tag)
word op
if not seq
seq = new_op
op = seq
else
op = seq
while op=>opnext; op = op=>opnext; loop
op=>opnext = new_op
op = op=>opnext
fin
op->opcode = INVALID_CODE
op->opgroup = CODETAG_GROUP
op=>optag = tag
return seq
end
def gen_uop(seq, tkn)
byte code
word op
if not seq
seq = new_op
op = seq
else
op = seq
while op=>opnext; op = op=>opnext; loop
op=>opnext = new_op
op = op=>opnext
fin
when tkn
is NEG_TKN
code = $90; break
is COMP_TKN
code = $92; break
is LOGIC_NOT_TKN
code = $80; break
is INC_TKN
code = $8C; break
is DEC_TKN
code = $8E; break
is BPTR_TKN
code = $60; break
is WPTR_TKN
code = $62; break
otherwise
exit_err(ERR_INVAL|ERR_SYNTAX)
wend
op->opcode = code
op->opgroup = STACK_GROUP
return seq
end
def gen_bop(seq, tkn)
byte code
word op
if not seq
seq = new_op
op = seq
else
op = seq
while op=>opnext; op = op=>opnext; loop
op=>opnext = new_op
op = op=>opnext
fin
when tkn
is MUL_TKN
code = $86; break
is DIV_TKN
code = $88; break
is MOD_TKN
code = $8A; break
is ADD_TKN
code = $82; break
is SUB_TKN
code = $84; break
is SHL_TKN
code = $9A; break
is SHR_TKN
code = $9C; break
is AND_TKN
code = $94; break
is OR_TKN
code = $96; break
is EOR_TKN
code = $98; break
is EQ_TKN
code = $40; break
is NE_TKN
code = $42; break
is GE_TKN
code = $48; break
is LT_TKN
code = $46; break
is GT_TKN
code = $44; break
is LE_TKN
code = $4A; break
otherwise
exit_err(ERR_INVAL|ERR_SYNTAX)
wend
op->opcode = code
op->opgroup = STACK_GROUP
return seq
end
//
// A DCI string is one that has the high bit set for every character except the last.
// More efficient than C or Pascal strings.
//
def dcitos(dci, str)
byte len, c
len = 0
repeat
c = ^(dci + len)
len++
^(str + len) = c & $7F
until not (c & $80)
^str = len
return len
end
def stodci(str, dci)
byte len, c
len = ^str
if not len; return 0; fin
c = toupper(^(str + len)) & $7F
len--
^(dci + len) = c
while len
c = toupper(^(str + len)) | $80
len--
^(dci + len) = c
loop
return ^str
end
//
// Write Extended REL header
//
def writeheader(refnum)
word moddep, modfix
byte len, header[128]
moddep = @header:12 // Beginning of module dependency list
while moddep_cnt
moddep_cnt--
moddep = moddep + stodci(@moddep_tbl[moddep_cnt*16], moddep)
loop
^moddep = 0 // Terminate dependency list
len = moddep - 1 - @header
modfix = len + RELADDR - codebuff // Convert generated address into module adress
header:0 = len + codeptr - codebuff // sizeof header+data+bytecode
header:2 = $6502 // Magic #
header:4 = modsysflags // Module SYSFLAGS
header:6 = len + RELADDR + datasize // Byte code offset
header:8 = def_cnt // DEFinition count
header:10 = entrypoint + modfix // Init entrypoint
fileio:write(refnum, @header, len + 2)
return len
end
//
// Write DeFinition Directory
//
def writeDFD(refnum, modfix)#0
word dfd, idptr, cnt
byte defdir[128]
dfd = @defdir
for cnt = 0 to dfd_cnt-1
dfd->0 = $02
dfd=>1 = tag_addr=>[dfd_tag=>[cnt]] + modfix
dfd->3 = 0
dfd = dfd + 4
next
fileio:write(refnum, @defdir, dfd - @defdir)
end
//
// Build External Symbol Directory on heap
//
def buildESD(modfix)#2
word modofst, esdtbl, esd, idptr, idcnt, len
byte symnum
symnum, esdtbl, idptr, idcnt = 0, heapalloc(heapavail - 256), idglobal_tbl, globals
esd = esdtbl
while idcnt
if idptr=>idtype & EXPORT_TYPE
esd = esd + stodci(@idptr->idname, esd)
esd->0 = $08
esd=>1 = tag_addr=>[idptr=>idval] + modfix
esd = esd + 3
elsif idptr=>idtype & EXTACCESS_TYPE
esd = esd + stodci(@idptr->idname, esd)
esd->0 = $10
esd=>1 = symnum
esd = esd + 3
idptr->extnum = symnum
symnum++
fin
idptr = idptr + idptr->idname + t_id
idcnt--
loop
^esd = 0
len = esd - esdtbl + 1
heaprelease(esdtbl + len)
return esdtbl, len
end
//
// Write ReLocation Directory
//
def writeRLD(refnum, modofst)#0
word rldtbl, rld, rldlen, fixups, updtptr, idptr, idcnt, tag
byte type
rldtbl = heapalloc(heapavail - 256)
rld = rldtbl
rldlen = 0
for fixups = fixup_cnt-1 downto 0
tag = fixup_tag=>[fixups]
type = tag_type->[tag]
if not (type & RELATIVE_FIXUP)
if rldlen == 64 // Write out blocks of entries
fileio:write(refnum, rldtbl, rld - rldtbl)
rld = rldtbl
rldlen = 0
fin
if type & EXTERN_FIXUP
idptr = idglobal_tbl
for idcnt = globals-1 downto 0
if (idptr=>idtype & EXTERN_TYPE) and (idptr=>idval == tag)
rld->3 = idptr->extnum
break
fin
idptr = idptr + idptr->idname + t_id
next
else
rld->3 = 0
fin
rld->0 = $01 | (type & MASK_FIXUP)
rld=>1 = fixup_addr=>[fixups] + modofst
rld = rld + 4
rldlen++
fin
next
^rld = 0
fileio:write(refnum, rldtbl, rld - rldtbl + 1)
heaprelease(rldtbl)
end
//
// Write Extended REL file
//
def writemodule(refnum)#0
word hdrlen, esd, esdlen, modfix, modadj, modofst, fixups, updtptr
//
// Write module header
//
hdrlen = writeheader(refnum)
modfix = hdrlen + RELADDR
modofst = hdrlen - codebuff
//
// Adjust internal fixups for header size
//
for fixups = fixup_cnt-1 downto 0
if not (tag_type->[fixup_tag=>[fixups]] & (EXTERN_FIXUP|RELATIVE_FIXUP))
updtptr = fixup_addr=>[fixups]
*updtptr = *updtptr + modfix
fin
next
//
// Write data/code buffer
//
fileio:write(refnum, codebuff, codeptr - codebuff)
//
// Write bytecode definition directory
//
writeDFD(refnum, modfix)
//
// Build EXERN/ENTRY directory
//
esd, esdlen = buildESD(modfix)
//
// Write relocation directory
//
writeRLD(refnum, modofst)
//
// Write EXTERN/EBTRY directory
//
fileio:write(refnum, esd, esdlen)
heaprelease(esd)
end