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/*
* lmem.c -- memory initialization and allocation; also parses arguments.
*/
#include "link.h"
#include "tproto.h"
#include "tglobals.h"
/*
* Prototypes.
*/
static struct lfile *alclfile (char *name);
void dumplfiles(void);
/*
* Memory initialization
*/
struct gentry **lghash; /* hash area for global table */
struct ientry **lihash; /* hash area for identifier table */
struct fentry **lfhash; /* hash area for field table */
struct lentry *lltable; /* local table */
struct centry *lctable; /* constant table */
struct ipc_fname *fnmtbl; /* table associating ipc with file name */
struct ipc_line *lntable; /* table associating ipc with line number */
char *lsspace; /* string space */
word *labels; /* label table */
char *codeb; /* generated code space */
struct ipc_fname *fnmfree; /* free pointer for ipc/file name table */
struct ipc_line *lnfree; /* free pointer for ipc/line number table */
word lsfree; /* free index for string space */
char *codep; /* free pointer for code space */
struct fentry *lffirst; /* first field table entry */
struct fentry *lflast; /* last field table entry */
struct gentry *lgfirst; /* first global table entry */
struct gentry *lglast; /* last global table entry */
/*
* linit - scan the command line arguments and initialize data structures.
*/
void linit()
{
struct gentry **gp;
struct ientry **ip;
struct fentry **fp;
llfiles = NULL; /* Zero queue of files to link. */
/*
* Allocate the various data structures that are used by the linker.
*/
lghash = (struct gentry **) tcalloc(ghsize, sizeof(struct gentry *));
lihash = (struct ientry **) tcalloc(ihsize, sizeof(struct ientry *));
lfhash = (struct fentry **) tcalloc(fhsize, sizeof(struct fentry *));
lltable = (struct lentry *) tcalloc(lsize, sizeof(struct lentry));
lctable = (struct centry *) tcalloc(csize, sizeof(struct centry));
lnfree = lntable = (struct ipc_line*)tcalloc(nsize,sizeof(struct ipc_line));
lsspace = (char *) tcalloc(stsize, sizeof(char));
lsfree = 0;
fnmtbl = (struct ipc_fname *) tcalloc(fnmsize, sizeof(struct ipc_fname));
fnmfree = fnmtbl;
labels = (word *) tcalloc(maxlabels, sizeof(word));
codep = codeb = (char *) tcalloc(maxcode, 1);
lffirst = NULL;
lflast = NULL;
lgfirst = NULL;
lglast = NULL;
/*
* Zero out the hash tables.
*/
for (gp = lghash; gp < &lghash[ghsize]; gp++)
*gp = NULL;
for (ip = lihash; ip < &lihash[ihsize]; ip++)
*ip = NULL;
for (fp = lfhash; fp < &lfhash[fhsize]; fp++)
*fp = NULL;
/*
* Install "main" as a global variable in order to insure that it
* is the first global variable. iconx/start.s depends on main
* being global number 0.
*/
putglobal(instid("main"), F_Global, 0, 0);
}
/*
* alsolink - create an lfile structure for the named file and add it to the
* end of the list of files (llfiles) to generate link instructions for.
*/
void alsolink(name)
char *name;
{
struct lfile *nlf, *p;
char file[MaxPath];
if (!pathfind(file, ipath, name, U1Suffix))
quitf("cannot resolve reference to file '%s'",name);
nlf = alclfile(file);
if (llfiles == NULL) {
llfiles = nlf;
}
else {
p = llfiles;
while (p->lf_link != NULL) {
if (strcmp(p->lf_name,file) == 0)
return;
p = p->lf_link;
}
if (strcmp(p->lf_name,file) == 0)
return;
p->lf_link = nlf;
}
}
/*
* getlfile - return a pointer (p) to the lfile structure pointed at by lptr
* and move lptr to the lfile structure that p points at. That is, getlfile
* returns a pointer to the current (wrt. lptr) lfile and advances lptr.
*/
struct lfile *getlfile(lptr)
struct lfile **lptr;
{
struct lfile *p;
if (*lptr == NULL)
return (struct lfile *)NULL;
else {
p = *lptr;
*lptr = p->lf_link;
return p;
}
}
/*
* alclfile - allocate an lfile structure for the named file, fill
* in the name and return a pointer to it.
*/
static struct lfile *alclfile(name)
char *name;
{
struct lfile *p;
p = (struct lfile *) alloc(sizeof(struct lfile));
p->lf_link = NULL;
p->lf_name = salloc(name);
return p;
}
/*
* lmfree - free memory used by the linker
*/
void lmfree()
{
struct fentry *fp, *fp1;
struct gentry *gp, *gp1;
struct rentry *rp, *rp1;
struct ientry *ip, *ip1;
int i;
for (i = 0; i < ihsize; ++i)
for (ip = lihash[i]; ip != NULL; ip = ip1) {
ip1 = ip->i_blink;
free((char *)ip);
}
free((char *) lghash); lghash = NULL;
free((char *) lihash); lihash = NULL;
free((char *) lfhash); lfhash = NULL;
free((char *) lltable); lltable = NULL;
free((char *) lctable); lctable = NULL;
free((char *) lntable); lntable = NULL;
free((char *) lsspace); lsspace = NULL;
free((char *) fnmtbl); fnmtbl = NULL;
free((char *) labels); labels = NULL;
free((char *) codep); codep = NULL;
for (fp = lffirst; fp != NULL; fp = fp1) {
for(rp = fp->f_rlist; rp != NULL; rp = rp1) {
rp1 = rp->r_link;
free((char *)rp);
}
fp1 = fp->f_nextentry;
free((char *)fp);
}
lffirst = NULL;
lflast = NULL;
for (gp = lgfirst; gp != NULL; gp = gp1) {
gp1 = gp->g_next;
free((char *)gp);
}
lgfirst = NULL;
lglast = NULL;
}
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