Import sources from 2011-03-30 iso image

1 files changed, 595 insertions, 0 deletions

diff --git a/sys/src/cmd/acid/main.c b/sys/src/cmd/acid/main.c
new file mode 100755
index 000000000..bb27cc9e3
--- /dev/null
+++ b/sys/src/cmd/acid/main.c
@@ -0,0 +1,595 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <mach.h>
+#define Extern
+#include "acid.h"
+#include "y.tab.h"
+
+extern int _ifmt(Fmt*);
+
+static Biobuf	bioout;
+static char	prog[128];
+static char*	lm[16];
+static int	nlm;
+static char*	mtype;
+
+static	int attachfiles(char*, int);
+int	xfmt(Fmt*);
+int	isnumeric(char*);
+void	die(void);
+void	loadmoduleobjtype(void);
+
+void
+usage(void)
+{
+	fprint(2, "usage: acid [-kqw] [-l library] [-m machine] [pid] [file]\n");
+	exits("usage");
+}
+
+void
+main(int argc, char *argv[])
+{
+	Lsym *l;
+	Node *n;
+	char *s;
+	int pid, i;
+
+	argv0 = argv[0];
+	pid = 0;
+	aout = "8.out";
+	quiet = 1;
+
+	mtype = 0;
+	ARGBEGIN{
+	case 'm':
+		mtype = ARGF();
+		break;
+	case 'w':
+		wtflag = 1;
+		break;
+	case 'l':
+		s = ARGF();
+		if(s == 0)
+			usage();
+		lm[nlm++] = s;
+		break;
+	case 'k':
+		kernel++;
+		break;
+	case 'q':
+		quiet = 0;
+		break;
+	case 'r':
+		pid = 1;
+		remote++;
+		kernel++;
+		break;
+	default:
+		usage();
+	}ARGEND
+
+	if(argc > 0) {
+		if(remote)
+			aout = argv[0];
+		else
+		if(isnumeric(argv[0])) {
+			pid = strtol(argv[0], 0, 0);
+			snprint(prog, sizeof(prog), "/proc/%d/text", pid);
+			aout = prog;
+			if(argc > 1)
+				aout = argv[1];
+			else if(kernel)
+				aout = system();
+		}
+		else {
+			if(kernel) {
+				fprint(2, "acid: -k requires a pid\n");
+				usage();
+			}
+			aout = argv[0];
+		}
+	} else
+	if(remote)
+		aout = "/mips/9ch";
+
+	fmtinstall('x', xfmt);
+	fmtinstall('L', Lfmt);
+	Binit(&bioout, 1, OWRITE);
+	bout = &bioout;
+
+	kinit();
+	initialising = 1;
+	pushfile(0);
+	loadvars();
+	installbuiltin();
+
+	if(mtype && machbyname(mtype) == 0)
+		print("unknown machine %s", mtype);
+
+	if (attachfiles(aout, pid) < 0)
+		varreg();		/* use default register set on error */
+
+	loadmodule("/sys/lib/acid/port");
+	loadmoduleobjtype();
+
+	for(i = 0; i < nlm; i++) {
+		if(access(lm[i], AREAD) >= 0)
+			loadmodule(lm[i]);
+		else {
+			s = smprint("/sys/lib/acid/%s", lm[i]);
+			loadmodule(s);
+			free(s);
+		}
+	}
+
+	userinit();
+	varsym();
+
+	l = look("acidmap");
+	if(l && l->proc) {
+		n = an(ONAME, ZN, ZN);
+		n->sym = l;
+		n = an(OCALL, n, ZN);
+		execute(n);
+	}
+
+	interactive = 1;
+	initialising = 0;
+	line = 1;
+
+	notify(catcher);
+
+	for(;;) {
+		if(setjmp(err)) {
+			Binit(&bioout, 1, OWRITE);
+			unwind();
+		}
+		stacked = 0;
+
+		Bprint(bout, "acid: ");
+
+		if(yyparse() != 1)
+			die();
+		restartio();
+
+		unwind();
+	}
+	/* not reached */
+}
+
+static int
+attachfiles(char *aout, int pid)
+{
+	interactive = 0;
+	if(setjmp(err))
+		return -1;
+
+	if(aout) {				/* executable given */
+		if(wtflag)
+			text = open(aout, ORDWR);
+		else
+			text = open(aout, OREAD);
+
+		if(text < 0)
+			error("%s: can't open %s: %r\n", argv0, aout);
+		readtext(aout);
+	}
+	if(pid)					/* pid given */
+		sproc(pid);
+	return 0;
+}
+
+void
+die(void)
+{
+	Lsym *s;
+	List *f;
+
+	Bprint(bout, "\n");
+
+	s = look("proclist");
+	if(s && s->v->type == TLIST) {
+		for(f = s->v->l; f; f = f->next)
+			Bprint(bout, "echo kill > /proc/%d/ctl\n", (int)f->ival);
+	}
+	exits(0);
+}
+
+void
+loadmoduleobjtype(void)
+{
+	char *buf;
+
+	buf = smprint("/sys/lib/acid/%s", mach->name);
+	loadmodule(buf);
+	free(buf);
+}
+
+void
+userinit(void)
+{
+	Lsym *l;
+	Node *n;
+	char *buf, *p;
+
+	p = getenv("home");
+	if(p != 0) {
+		buf = smprint("%s/lib/acid", p);
+		silent = 1;
+		loadmodule(buf);
+		free(buf);
+	}
+
+	interactive = 0;
+	if(setjmp(err)) {
+		unwind();
+		return;
+	}
+	l = look("acidinit");
+	if(l && l->proc) {
+		n = an(ONAME, ZN, ZN);
+		n->sym = l;
+		n = an(OCALL, n, ZN);
+		execute(n);
+	}
+}
+
+void
+loadmodule(char *s)
+{
+	interactive = 0;
+	if(setjmp(err)) {
+		unwind();
+		return;
+	}
+	pushfile(s);
+	silent = 0;
+	yyparse();
+	popio();
+	return;
+}
+
+void
+readtext(char *s)
+{
+	Dir *d;
+	Lsym *l;
+	Value *v;
+	uvlong length;
+	Symbol sym;
+	extern Machdata mipsmach;
+
+	if(mtype != 0){
+		symmap = newmap(0, 1);
+		if(symmap == 0)
+			print("%s: (error) loadmap: cannot make symbol map\n", argv0);
+		length = 1<<24;
+		d = dirfstat(text);
+		if(d != nil){
+			length = d->length;
+			free(d);
+		}
+		setmap(symmap, text, 0, length, 0, "binary");
+		return;
+	}
+
+	machdata = &mipsmach;
+
+	if(!crackhdr(text, &fhdr)) {
+		print("can't decode file header\n");
+		return;
+	}
+
+	symmap = loadmap(0, text, &fhdr);
+	if(symmap == 0)
+		print("%s: (error) loadmap: cannot make symbol map\n", argv0);
+
+	if(syminit(text, &fhdr) < 0) {
+		print("%s: (error) syminit: %r\n", argv0);
+		return;
+	}
+	print("%s:%s\n", s, fhdr.name);
+
+	if(mach->sbreg && lookup(0, mach->sbreg, &sym)) {
+		mach->sb = sym.value;
+		l = enter("SB", Tid);
+		l->v->fmt = 'X';
+		l->v->ival = mach->sb;
+		l->v->type = TINT;
+		l->v->set = 1;
+	}
+
+	l = mkvar("objtype");
+	v = l->v;
+	v->fmt = 's';
+	v->set = 1;
+	v->string = strnode(mach->name);
+	v->type = TSTRING;
+
+	l = mkvar("textfile");
+	v = l->v;
+	v->fmt = 's';
+	v->set = 1;
+	v->string = strnode(s);
+	v->type = TSTRING;
+
+	machbytype(fhdr.type);
+	varreg();
+}
+
+Node*
+an(int op, Node *l, Node *r)
+{
+	Node *n;
+
+	n = gmalloc(sizeof(Node));
+	memset(n, 0, sizeof(Node));
+	n->gclink = gcl;
+	gcl = n;
+	n->op = op;
+	n->left = l;
+	n->right = r;
+	return n;
+}
+
+List*
+al(int t)
+{
+	List *l;
+
+	l = gmalloc(sizeof(List));
+	memset(l, 0, sizeof(List));
+	l->type = t;
+	l->gclink = gcl;
+	gcl = l;
+	return l;
+}
+
+Node*
+con(vlong v)
+{
+	Node *n;
+
+	n = an(OCONST, ZN, ZN);
+	n->ival = v;
+	n->fmt = 'W';
+	n->type = TINT;
+	return n;
+}
+
+void
+fatal(char *fmt, ...)
+{
+	char buf[128];
+	va_list arg;
+
+	va_start(arg, fmt);
+	vseprint(buf, buf+sizeof(buf), fmt, arg);
+	va_end(arg);
+	fprint(2, "%s: %L (fatal problem) %s\n", argv0, buf);
+	exits(buf);
+}
+
+void
+yyerror(char *fmt, ...)
+{
+	char buf[128];
+	va_list arg;
+
+	if(strcmp(fmt, "syntax error") == 0) {
+		yyerror("syntax error, near symbol '%s'", symbol);
+		return;
+	}
+	va_start(arg, fmt);
+	vseprint(buf, buf+sizeof(buf), fmt, arg);
+	va_end(arg);
+	print("%L: %s\n", buf);
+}
+
+void
+marktree(Node *n)
+{
+
+	if(n == 0)
+		return;
+
+	marktree(n->left);
+	marktree(n->right);
+
+	n->gcmark = 1;
+	if(n->op != OCONST)
+		return;
+
+	switch(n->type) {
+	case TSTRING:
+		n->string->gcmark = 1;
+		break;
+	case TLIST:
+		marklist(n->l);
+		break;
+	case TCODE:
+		marktree(n->cc);
+		break;
+	}
+}
+
+void
+marklist(List *l)
+{
+	while(l) {
+		l->gcmark = 1;
+		switch(l->type) {
+		case TSTRING:
+			l->string->gcmark = 1;
+			break;
+		case TLIST:
+			marklist(l->l);
+			break;
+		case TCODE:
+			marktree(l->cc);
+			break;
+		}
+		l = l->next;
+	}
+}
+
+void
+gc(void)
+{
+	int i;
+	Lsym *f;
+	Value *v;
+	Gc *m, **p, *next;
+
+	if(dogc < Mempergc)
+		return;
+	dogc = 0;
+
+	/* Mark */
+	for(m = gcl; m; m = m->gclink)
+		m->gcmark = 0;
+
+	/* Scan */
+	for(i = 0; i < Hashsize; i++) {
+		for(f = hash[i]; f; f = f->hash) {
+			marktree(f->proc);
+			if(f->lexval != Tid)
+				continue;
+			for(v = f->v; v; v = v->pop) {
+				switch(v->type) {
+				case TSTRING:
+					v->string->gcmark = 1;
+					break;
+				case TLIST:
+					marklist(v->l);
+					break;
+				case TCODE:
+					marktree(v->cc);
+					break;
+				}
+			}
+		}
+	}
+
+	/* Free */
+	p = &gcl;
+	for(m = gcl; m; m = next) {
+		next = m->gclink;
+		if(m->gcmark == 0) {
+			*p = next;
+			free(m);	/* Sleazy reliance on my malloc */
+		}
+		else
+			p = &m->gclink;
+	}
+}
+
+void*
+gmalloc(long l)
+{
+	void *p;
+
+	dogc += l;
+	p = malloc(l);
+	if(p == 0)
+		fatal("out of memory");
+	return p;
+}
+
+void
+checkqid(int f1, int pid)
+{
+	int fd;
+	Dir *d1, *d2;
+	char buf[128];
+
+	if(kernel)
+		return;
+
+	d1 = dirfstat(f1);
+	if(d1 == nil){
+		print("checkqid: (qid not checked) dirfstat: %r\n");
+		return;
+	}
+
+	snprint(buf, sizeof(buf), "/proc/%d/text", pid);
+	fd = open(buf, OREAD);
+	if(fd < 0 || (d2 = dirfstat(fd)) == nil){
+		print("checkqid: (qid not checked) dirstat %s: %r\n", buf);
+		free(d1);
+		if(fd >= 0)
+			close(fd);
+		return;
+	}
+
+	close(fd);
+
+	if(d1->qid.path != d2->qid.path || d1->qid.vers != d2->qid.vers || d1->qid.type != d2->qid.type){
+		print("path %llux %llux vers %lud %lud type %d %d\n",
+			d1->qid.path, d2->qid.path, d1->qid.vers, d2->qid.vers, d1->qid.type, d2->qid.type);
+		print("warning: image does not match text for pid %d\n", pid);
+	}
+	free(d1);
+	free(d2);
+}
+
+void
+catcher(void *junk, char *s)
+{
+	USED(junk);
+
+	if(strstr(s, "interrupt")) {
+		gotint = 1;
+		noted(NCONT);
+	}
+	noted(NDFLT);
+}
+
+char*
+system(void)
+{
+	char *cpu, *p, *q;
+	static char *kernel;
+
+	cpu = getenv("cputype");
+	if(cpu == 0) {
+		cpu = "mips";
+		print("$cputype not set; assuming %s\n", cpu);
+	}
+	p = getenv("terminal");
+	if(p == 0 || (p=strchr(p, ' ')) == 0 || p[1] == ' ' || p[1] == 0) {
+		p = "ch";
+		print("missing or bad $terminal; assuming %s\n", p);
+	}
+	else{
+		p++;
+		q = strchr(p, ' ');
+		if(q)
+			*q = 0;
+	}
+
+	if(kernel != nil)
+		free(kernel);
+	kernel = smprint("/%s/9%s", cpu, p);
+
+	return kernel;
+}
+
+int
+isnumeric(char *s)
+{
+	while(*s) {
+		if(*s < '0' || *s > '9')
+			return 0;
+		s++;
+	}
+	return 1;
+}
+
+int
+xfmt(Fmt *f)
+{
+	f->flags ^= FmtSharp;
+	return _ifmt(f);
+}