static void
loaddynimport(char *file, char *pkg, char *p, int n)
{
char *pend, *next, *name, *def, *p0, *lib, *q;
Sym *s;
pend = p + n;
p0 = p;
for(; p<pend; p=next) {
next = strchr(p, '\n');
if(next == nil)
next = "";
else
*next++ = '\0';
p0 = p;
if(strncmp(p, "dynimport ", 10) != 0)
goto err;
p += 10;
name = p;
p = strchr(name, ' ');
if(p == nil)
goto err;
while(*p == ' ')
p++;
def = p;
p = strchr(def, ' ');
if(p == nil)
goto err;
while(*p == ' ')
p++;
lib = p;
// successful parse: now can edit the line
*strchr(name, ' ') = 0;
*strchr(def, ' ') = 0;
if(debug['d']) {
fprint(2, "%s: %s: cannot use dynamic imports with -d flag\n", argv0, file);
nerrors++;
return;
}
if(strcmp(name, "_") == 0 && strcmp(def, "_") == 0) {
// allow #pragma dynimport _ _ "foo.so"
// to force a link of foo.so.
havedynamic = 1;
adddynlib(lib);
continue;
}
name = expandpkg(name, pkg);
q = strchr(def, '@');
if(q)
*q++ = '\0';
s = lookup(name, 0);
if(s->type == 0 || s->type == SXREF) {
s->dynimplib = lib;
s->dynimpname = def;
s->dynimpvers = q;
s->type = SDYNIMPORT;
havedynamic = 1;
}
}
return;
err:
fprint(2, "%s: %s: invalid dynimport line: %s\n", argv0, file, p0);
nerrors++;
}
static void
loadcgo(char *file, char *pkg, char *p, int n)
{
char *pend, *next, *p0, *q;
char *f[10], *local, *remote, *lib;
int nf;
Sym *s;
USED(file);
pend = p + n;
p0 = nil;
for(; p<pend; p=next) {
next = strchr(p, '\n');
if(next == nil)
next = "";
else
*next++ = '\0';
free(p0);
p0 = estrdup(p); // save for error message
nf = tokenize(p, f, nelem(f));
if(strcmp(f[0], "cgo_import_dynamic") == 0) {
if(nf < 2 || nf > 4)
goto err;
local = f[1];
remote = local;
if(nf > 2)
remote = f[2];
lib = "";
if(nf > 3)
lib = f[3];
if(debug['d']) {
fprint(2, "%s: %s: cannot use dynamic imports with -d flag\n", argv0, file);
nerrors++;
return;
}
if(strcmp(local, "_") == 0 && strcmp(remote, "_") == 0) {
// allow #pragma dynimport _ _ "foo.so"
// to force a link of foo.so.
havedynamic = 1;
adddynlib(lib);
continue;
}
local = expandpkg(local, pkg);
q = strchr(remote, '#');
if(q)
*q++ = '\0';
s = lookup(local, 0);
if(local != f[1])
free(local);
if(s->type == 0 || s->type == SXREF || s->type == SHOSTOBJ) {
s->dynimplib = lib;
s->extname = remote;
s->dynimpvers = q;
if(s->type != SHOSTOBJ)
s->type = SDYNIMPORT;
havedynamic = 1;
}
continue;
}
if(strcmp(f[0], "cgo_import_static") == 0) {
if(nf != 2)
goto err;
local = f[1];
s = lookup(local, 0);
s->type = SHOSTOBJ;
s->size = 0;
continue;
}
if(strcmp(f[0], "cgo_export_static") == 0 || strcmp(f[0], "cgo_export_dynamic") == 0) {
// TODO: Remove once we know Windows is okay.
if(strcmp(f[0], "cgo_export_static") == 0 && HEADTYPE == Hwindows)
continue;
if(nf < 2 || nf > 3)
goto err;
local = f[1];
if(nf > 2)
remote = f[2];
else
remote = local;
local = expandpkg(local, pkg);
s = lookup(local, 0);
if(flag_shared && s == lookup("main", 0))
continue;
// export overrides import, for openbsd/cgo.
// see issue 4878.
if(s->dynimplib != nil) {
s->dynimplib = nil;
s->extname = nil;
s->dynimpvers = nil;
s->type = 0;
}
if(s->cgoexport == 0) {
s->extname = remote;
if(ndynexp%32 == 0)
dynexp = erealloc(dynexp, (ndynexp+32)*sizeof dynexp[0]);
dynexp[ndynexp++] = s;
} else if(strcmp(s->extname, remote) != 0) {
fprint(2, "%s: conflicting cgo_export directives: %s as %s and %s\n", argv0, s->name, s->extname, remote);
nerrors++;
return;
}
if(strcmp(f[0], "cgo_export_static") == 0)
s->cgoexport |= CgoExportStatic;
else
s->cgoexport |= CgoExportDynamic;
if(local != f[1])
free(local);
continue;
}
if(strcmp(f[0], "cgo_dynamic_linker") == 0) {
if(nf != 2)
goto err;
if(!debug['I']) { // not overridden by command line
if(interpreter != nil && strcmp(interpreter, f[1]) != 0) {
fprint(2, "%s: conflict dynlinker: %s and %s\n", argv0, interpreter, f[1]);
nerrors++;
return;
}
free(interpreter);
interpreter = estrdup(f[1]);
}
continue;
}
if(strcmp(f[0], "cgo_ldflag") == 0) {
if(nf != 2)
goto err;
if(nldflag%32 == 0)
ldflag = erealloc(ldflag, (nldflag+32)*sizeof ldflag[0]);
ldflag[nldflag++] = estrdup(f[1]);
continue;
}
}
free(p0);
return;
err:
fprint(2, "%s: %s: invalid dynimport line: %s\n", argv0, file, p0);
nerrors++;
}