ref: 3a77c01f43821dcc4f7cae54aff89bb20f2d95a5
dir: /sys/src/cmd/vi/cmd.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <mach.h>
#include <ctype.h>
#define Extern extern
#include "mips.h"
char buf[128], lastcmd[128];
char fmt = 'X';
int width = 60;
int inc;
ulong expr(char*);
ulong expr1(char*);
char* term(char*, ulong*);
char *
nextc(char *p)
{
while(*p && (*p == ' ' || *p == '\t') && *p != '\n')
p++;
if(*p == '\n')
*p = '\0';
return p;
}
char *
numsym(char *addr, ulong *val)
{
char tsym[128], *t;
static char *delim = "`'<>/\\@*|-~+-/=?\n";
Symbol s;
char c;
t = tsym;
while(c = *addr) {
if(strchr(delim, c))
break;
*t++ = c;
addr++;
}
t[0] = '\0';
if(strcmp(tsym, ".") == 0) {
*val = dot;
return addr;
}
if(lookup(0, tsym, &s))
*val = s.value;
else {
if(tsym[0] == '#')
*val = strtoul(tsym+1, 0, 16);
else
*val = strtoul(tsym, 0, 0);
}
return addr;
}
ulong
expr(char *addr)
{
ulong t, t2;
char op;
if(*addr == '\0')
return dot;
addr = numsym(addr, &t);
if(*addr == '\0')
return t;
addr = nextc(addr);
op = *addr++;
numsym(addr, &t2);
switch(op) {
default:
Bprint(bioout, "expr syntax\n");
return 0;
case '+':
t += t2;
break;
case '-':
t -= t2;
break;
case '%':
t /= t2;
break;
case '&':
t &= t2;
break;
case '|':
t |= t2;
break;
}
return t;
}
int
buildargv(char *str, char **args, int max)
{
int na = 0;
while (na < max) {
while((*str == ' ' || *str == '\t' || *str == '\n') && *str != '\0')
str++;
if(*str == '\0')
return na;
args[na++] = str;
while(!(*str == ' ' || *str == '\t'|| *str == '\n') && *str != '\0')
str++;
if(*str == '\n')
*str = '\0';
if(*str == '\0')
break;
*str++ = '\0';
}
return na;
}
void
colon(char *addr, char *cp)
{
int argc;
char *argv[100];
char tbuf[512];
cp = nextc(cp);
switch(*cp) {
default:
Bprint(bioout, "?\n");
return;
case 'b':
breakpoint(addr, cp+1);
return;
case 'd':
delbpt(addr);
return;
/* These fall through to print the stopped address */
case 'r':
reset();
argc = buildargv(cp+1, argv, 100);
initstk(argc, argv);
count = 0;
atbpt = 0;
run();
break;
case 'c':
count = 0;
atbpt = 0;
run();
break;
case 's':
cp = nextc(cp+1);
count = 0;
if(*cp)
count = strtoul(cp, 0, 0);
if(count == 0)
count = 1;
atbpt = 0;
run();
break;
}
dot = reg.pc;
Bprint(bioout, "%s at #%lux ", atbpt ? "breakpoint" : "stopped", dot);
symoff(tbuf, sizeof(tbuf), dot, CTEXT);
Bprint(bioout, tbuf);
if(fmt == 'z')
printsource(dot);
Bprint(bioout, "\n");
}
void
dollar(char *cp)
{
int nr;
cp = nextc(cp);
switch(*cp) {
default:
Bprint(bioout, "?\n");
break;
case 'c':
stktrace(*cp);
break;
case 'C':
stktrace(*cp);
break;
case 'b':
dobplist();
break;
case 'r':
dumpreg();
break;
case 'R':
dumpreg();
case 'f':
dumpfreg();
break;
case 'F':
dumpdreg();
break;
case 'q':
exits(0);
break;
case 'Q':
isum();
tlbsum();
segsum();
break;
case 't':
cp++;
switch(*cp) {
default:
Bprint(bioout, "$t[0sicr#]\n");
break;
case '\0':
trace = 1;
break;
case '0':
trace = 0;
sysdbg = 0;
calltree = 0;
break;
case 's':
sysdbg = 1;
break;
case 'i':
trace = 1;
break;
case 'c':
calltree = 1;
break;
case 'r':
nr = atoi(cp+1);
if(nr < 0 || nr > 31) {
print("bad register\n");
break;
}
rtrace ^= (1<<nr);
print("%.8ux\n", rtrace);
break;
}
break;
case 'i':
cp++;
switch(*cp) {
default:
Bprint(bioout, "$i[itsa]\n");
break;
case 'i':
isum();
break;
case 't':
tlbsum();
break;
case 's':
segsum();
break;
case 'a':
isum();
tlbsum();
segsum();
iprofile();
break;
case 'p':
iprofile();
break;
}
}
}
int
pfmt(char fmt, int mem, ulong val)
{
int c, i;
Symbol s;
char *p, ch, str[1024];
c = 0;
switch(fmt) {
default:
Bprint(bioout, "bad modifier\n");
return 0;
case 'o':
c = Bprint(bioout, "%-4lo ", mem ? (ushort)getmem_2(dot) : val);
inc = 2;
break;
case 'O':
c = Bprint(bioout, "%-8lo ", mem ? getmem_4(dot) : val);
inc = 4;
break;
case 'q':
c = Bprint(bioout, "%-4lo ", mem ? (short)getmem_2(dot) : val);
inc = 2;
break;
case 'Q':
c = Bprint(bioout, "%-8lo ", mem ? (long)getmem_4(dot) : val);
inc = 4;
break;
case 'd':
c = Bprint(bioout, "%-5ld ", mem ? (short)getmem_2(dot) : val);
inc = 2;
break;
case 'D':
c = Bprint(bioout, "%-8ld ", mem ? (long)getmem_4(dot) : val);
inc = 4;
break;
case 'x':
c = Bprint(bioout, "#%-4lux ", mem ? (long)getmem_2(dot) : val);
inc = 2;
break;
case 'X':
c = Bprint(bioout, "#%-8lux ", mem ? (long)getmem_4(dot) : val);
inc = 4;
break;
case 'u':
c = Bprint(bioout, "%-5ld ", mem ? (ushort)getmem_2(dot) : val);
inc = 2;
break;
case 'U':
c = Bprint(bioout, "%-8ld ", mem ? (ulong)getmem_4(dot) : val);
inc = 4;
break;
case 'b':
c = Bprint(bioout, "%-3ld ", mem ? getmem_b(dot) : val);
inc = 1;
break;
case 'c':
c = Bprint(bioout, "%c ", (int)(mem ? getmem_b(dot) : val));
inc = 1;
break;
case 'C':
ch = mem ? getmem_b(dot) : val;
if(isprint(ch))
c = Bprint(bioout, "%c ", ch);
else
c = Bprint(bioout, "\\x%.2x ", ch);
inc = 1;
break;
case 's':
i = 0;
while(ch = getmem_b(dot+i))
str[i++] = ch;
str[i] = '\0';
dot += i;
c = Bprint(bioout, "%s", str);
inc = 0;
break;
case 'S':
i = 0;
while(ch = getmem_b(dot+i))
str[i++] = ch;
str[i] = '\0';
dot += i;
for(p = str; *p; p++)
if(isprint(*p))
c += Bprint(bioout, "%c", *p);
else
c += Bprint(bioout, "\\x%.2ux", *p);
inc = 0;
break;
case 'Y':
p = ctime(mem ? getmem_b(dot) : val);
p[30] = '\0';
c = Bprint(bioout, "%s", p);
inc = 4;
break;
case 'a':
symoff(str, sizeof(str), dot, CTEXT);
c = Bprint(bioout, str);
inc = 0;
break;
case 'e':
for (i = 0; globalsym(&s, i); i++)
Bprint(bioout, "%-15s #%lux\n", s.name, getmem_4(s.value));
inc = 0;
break;
case 'i':
inc = _mipscoinst(symmap, dot, str, sizeof(str));
if (inc < 0) {
Bprint(bioout, "vi: %r\n");
return 0;
}
c = Bprint(bioout, str);
break;
case 'n':
c = width+1;
inc = 0;
break;
case '-':
c = 0;
inc = -1;
break;
case '+':
c = 0;
inc = 1;
break;
case '^':
c = 0;
if(inc > 0)
inc = -inc;
break;
case 'z':
if (findsym(dot, CTEXT, &s))
Bprint(bioout, " %s() ", s.name);
printsource(dot);
inc = 0;
break;
}
return c;
}
void
eval(char *addr, char *p)
{
ulong val;
val = expr(addr);
p = nextc(p);
if(*p == '\0') {
p[0] = fmt;
p[1] = '\0';
}
pfmt(*p, 0, val);
Bprint(bioout, "\n");
}
void
quesie(char *p)
{
int c, count, i;
char tbuf[512];
c = 0;
symoff(tbuf, sizeof(tbuf), dot, CTEXT);
Bprint(bioout, "%s?\t", tbuf);
while(*p) {
p = nextc(p);
if(*p == '"') {
for(p++; *p && *p != '"'; p++) {
Bputc(bioout, *p);
c++;
}
if(*p)
p++;
continue;
}
count = 0;
while(*p >= '0' && *p <= '9')
count = count*10 + (*p++ - '0');
if(count == 0)
count = 1;
p = nextc(p);
if(*p == '\0') {
p[0] = fmt;
p[1] = '\0';
}
for(i = 0; i < count; i++) {
c += pfmt(*p, 1, 0);
dot += inc;
if(c > width) {
Bprint(bioout, "\n");
symoff(tbuf, sizeof(tbuf), dot, CTEXT);
Bprint(bioout, "%s?\t", tbuf);
c = 0;
}
}
fmt = *p++;
p = nextc(p);
}
Bprint(bioout, "\n");
}
void
catcher(void *a, char *msg)
{
USED(a);
if(strcmp(msg, "interrupt") != 0)
noted(NDFLT);
count = 1;
print("vi\n");
noted(NCONT);
}
void
setreg(char *addr, char *cp)
{
int rn;
dot = expr(addr);
cp = nextc(cp);
if(strcmp(cp, "pc") == 0) {
reg.pc = dot;
return;
}
if(strcmp(cp, "sp") == 0) {
reg.r[29] = dot;
return;
}
if(strcmp(cp, "mh") == 0) {
reg.mhi = dot;
return;
}
if(strcmp(cp, "ml") == 0) {
reg.mlo = dot;
return;
}
if(*cp++ == 'r') {
rn = strtoul(cp, 0, 10);
if(rn > 0 && rn < 32) {
reg.r[rn] = dot;
return;
}
}
Bprint(bioout, "bad register\n");
}
void
cmd(void)
{
char *p, *a, *cp, *gotint;
char addr[128];
static char *cmdlet = ":$?/=>";
int n, i;
notify(catcher);
dot = reg.pc;
setjmp(errjmp);
for(;;) {
Bflush(bioout);
p = buf;
n = 0;
for(;;) {
i = Bgetc(bin);
if(i < 0)
exits(0);
*p++ = i;
n++;
if(i == '\n')
break;
}
if(buf[0] == '\n')
strcpy(buf, lastcmd);
else {
buf[n-1] = '\0';
strcpy(lastcmd, buf);
}
p = buf;
a = addr;
for(;;) {
p = nextc(p);
if(*p == 0 || strchr(cmdlet, *p))
break;
*a++ = *p++;
}
*a = '\0';
cmdcount = 1;
cp = strchr(addr, ',');
if(cp != 0) {
if(cp[1] == '#')
cmdcount = strtoul(cp+2, &gotint, 16);
else
cmdcount = strtoul(cp+1, &gotint, 0);
*cp = '\0';
}
switch(*p) {
case '$':
dollar(p+1);
break;
case ':':
colon(addr, p+1);
break;
case '/':
case '?':
dot = expr(addr);
for(i = 0; i < cmdcount; i++)
quesie(p+1);
break;
case '=':
eval(addr, p+1);
break;
case '>':
setreg(addr, p+1);
break;
default:
Bprint(bioout, "?\n");
break;
}
}
}