388 lines
8.3 KiB
C
388 lines
8.3 KiB
C
/*
|
|
* core.c for mdb
|
|
*
|
|
* reads information from 'core' file
|
|
* Partly derived from 'adb' by D. Dugger.
|
|
*/
|
|
#include "mdb.h"
|
|
|
|
#include <signal.h>
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/ptrace.h>
|
|
|
|
#include <kernel/arch/i386/include/archtypes.h>
|
|
#include <kernel/const.h>
|
|
#include <kernel/type.h>
|
|
#include <kernel/proc.h>
|
|
|
|
/* defined in kernel.c */
|
|
extern struct proc *prc;
|
|
|
|
#include "proto.h"
|
|
|
|
#define BSIZE 512
|
|
#define LOGBS 9
|
|
|
|
PRIVATE struct file {
|
|
int fid;
|
|
char *name;
|
|
long cblock;
|
|
long tmap[3];
|
|
long dmap[3];
|
|
long smap[3];
|
|
char buf[BSIZE + BSIZE];
|
|
} Core_File, *core_file;
|
|
|
|
#define b1 tmap[0]
|
|
#define e1 tmap[1]
|
|
#define f1 tmap[2]
|
|
#define b2 dmap[0]
|
|
#define e2 dmap[1]
|
|
#define f2 dmap[2]
|
|
#define b3 smap[0]
|
|
#define e3 smap[1]
|
|
#define f3 smap[2]
|
|
|
|
PRIVATE long cnt[3]; /* Sizes of segments */
|
|
PRIVATE int h_size; /* Size of core header */
|
|
PRIVATE char def_name[] = "core"; /* Default core name */
|
|
|
|
#define SIZE_MP_SEG (sizeof(struct mem_map) * NR_LOCAL_SEGS)
|
|
#define SIZE_KINFO sizeof(struct proc)
|
|
#define SIZE_HEADER SIZE_MP_SEG
|
|
|
|
FORWARD _PROTOTYPE( int kernel_info , (int fd ));
|
|
FORWARD _PROTOTYPE( void setmap , (struct file *fp ));
|
|
FORWARD _PROTOTYPE( void read_info , (struct file *fp ));
|
|
FORWARD _PROTOTYPE( void ill_addr , (long d , int segment ));
|
|
FORWARD _PROTOTYPE( long map_addr , (long d , int segment ));
|
|
FORWARD _PROTOTYPE( unsigned long c_status, (void));
|
|
FORWARD _PROTOTYPE( long getn, (long d, int s) );
|
|
|
|
/*
|
|
* set and display mapping for core file
|
|
*/
|
|
PRIVATE void setmap(fp)
|
|
struct file *fp;
|
|
{
|
|
long h = (long) h_size;
|
|
|
|
fp->b1 = st_addr;
|
|
fp->e1 = st_addr + cnt[T];
|
|
fp->f1 = h;
|
|
|
|
fp->b2 = sd_addr;
|
|
fp->e2 = sd_addr + cnt[D];
|
|
fp->f2 = cnt[T] + h;
|
|
|
|
fp->b3 = sk_addr;
|
|
fp->e3 = sk_addr + cnt[S];
|
|
fp->f3 = cnt[T] + cnt[D] + h;
|
|
|
|
#ifdef MINIX_PC
|
|
if(is_separate) {
|
|
if ( end_addr < et_addr ) end_addr = et_addr;
|
|
}
|
|
else {
|
|
fp->b2 = st_addr;
|
|
fp->e2 = st_addr + cnt[T] + cnt[D];
|
|
fp->f2 = h;
|
|
end_addr = fp->e2;
|
|
|
|
fp->b1 = 0;
|
|
fp->e1 = -1;
|
|
fp->f1 = 0;
|
|
}
|
|
#endif
|
|
Printf("From core file:\n");
|
|
Printf("T\t%8lx %8lx %8lx\n", core_file->b1, core_file->e1, core_file->f1);
|
|
Printf("D\t%8lx %8lx %8lx\n", core_file->b2, core_file->e2, core_file->f2);
|
|
Printf("S\t%8lx %8lx %8lx\n", core_file->b3, core_file->e3, core_file->f3);
|
|
Printf("\n");
|
|
|
|
}
|
|
|
|
/* Print mapping */
|
|
PUBLIC void prtmap()
|
|
{
|
|
Printf("%s I & D space\t", (is_separate) ? "Separate " : "Combined ");
|
|
if (corepid > 0) {
|
|
Printf("File: %s\n\n", core_file->name);
|
|
setmap(core_file);
|
|
disp_maps();
|
|
}
|
|
else {
|
|
Printf("Pid: %d\n\n", curpid);
|
|
update();
|
|
disp_maps();
|
|
}
|
|
}
|
|
|
|
/* Illegal address */
|
|
PRIVATE void ill_addr(d, segment)
|
|
long d;
|
|
int segment;
|
|
{
|
|
Printf("Bad addr=%lx seg=%d",d,segment);
|
|
mdb_error("\n");
|
|
}
|
|
|
|
/* Map virtual address -> core file addresses
|
|
* depends on current segment if Separate I & D
|
|
*/
|
|
PRIVATE long map_addr(d, segment)
|
|
long d;
|
|
int segment;
|
|
{
|
|
#ifdef MINIX_PC
|
|
if (is_separate)
|
|
switch (segment) {
|
|
case T:
|
|
if (d >= core_file->b1 && d < core_file->e1)
|
|
d += core_file->f1 - core_file->b1;
|
|
else
|
|
ill_addr(d,segment);
|
|
break;
|
|
case D:
|
|
case S:
|
|
if (d >= core_file->b2 && d < core_file->e2)
|
|
d += core_file->f2 - core_file->b2;
|
|
else if (d >= core_file->b3 && d < core_file->e3)
|
|
d += core_file->f3 - core_file->b3;
|
|
else
|
|
ill_addr(d,segment);
|
|
break;
|
|
}
|
|
else {
|
|
#endif
|
|
if (d >= core_file->b1 && d < core_file->e1)
|
|
d += core_file->f1 - core_file->b1;
|
|
else if (d >= core_file->b2 && d < core_file->e2)
|
|
d += core_file->f2 - core_file->b2;
|
|
else if (d >= core_file->b3 && d < core_file->e3)
|
|
d += core_file->f3 - core_file->b3;
|
|
else
|
|
ill_addr(d,segment);
|
|
#ifdef MINIX_PC
|
|
}
|
|
#endif
|
|
return d;
|
|
}
|
|
|
|
|
|
/* Get value with address d and segment s */
|
|
PRIVATE long getn(d, s)
|
|
long d;
|
|
int s;
|
|
{
|
|
long b;
|
|
register int o,i;
|
|
union {
|
|
unsigned long l;
|
|
unsigned char c[4];
|
|
} data;
|
|
|
|
/* Map address */
|
|
d = map_addr(d, s);
|
|
|
|
b = d >> LOGBS;
|
|
o = d & (BSIZE - 1);
|
|
|
|
if (core_file->cblock != b) {
|
|
core_file->cblock = b;
|
|
lseek(core_file->fid, b << LOGBS, 0);
|
|
read(core_file->fid, core_file->buf, sizeof(core_file->buf));
|
|
}
|
|
|
|
for(i = 0; i<4; i++)
|
|
data.c[i] = core_file->buf[o+i];
|
|
|
|
#ifdef DEBUG
|
|
if (debug)
|
|
Printf("getn at %8lx val %8lx\n", d, data.l);
|
|
#endif
|
|
return data.l;
|
|
}
|
|
|
|
/* Read kernel info from core file into lbuf[] */
|
|
PRIVATE int kernel_info(fd)
|
|
int fd;
|
|
{
|
|
int r;
|
|
int ks;
|
|
|
|
/* Round SIZE_KINFO to multiple of sizeof(long) */
|
|
/* See mm/signal.c to see how a 'core' file is written */
|
|
ks = ( SIZE_KINFO / sizeof(long) ) * sizeof(long);
|
|
r = read(fd, (char *)lbuf, ks);
|
|
return(r == ks) ? ks : -1;
|
|
}
|
|
|
|
/*
|
|
* Print status info from core - returns PC
|
|
*/
|
|
PRIVATE unsigned long c_status()
|
|
{
|
|
fprintf(stderr, "WARNING: don't know pid from core; using proc nr for pid.\n");
|
|
|
|
Printf("Proc = %6d\n", prc->p_nr);
|
|
|
|
/* Set current pid to that of core */
|
|
curpid = corepid = prc->p_nr;
|
|
disp_maps();
|
|
Printf("\nPC = 0x%0*lx\t", 2 * ADDRSIZE, PC_MEMBER(prc) & MASK(ADDRSIZE));
|
|
symbolic((long) PC_MEMBER(prc), '\n');
|
|
dasm((long) PC_MEMBER(prc), 1, 1);
|
|
return PC_MEMBER(prc);
|
|
}
|
|
|
|
/* Read memory maps and kernel info from core file */
|
|
PRIVATE void read_info(fp)
|
|
struct file *fp;
|
|
{
|
|
struct mem_map seg[NR_LOCAL_SEGS];
|
|
int r;
|
|
int i;
|
|
|
|
lseek(fp->fid, 0L, 0L);
|
|
|
|
/* First read memory map of all segments. */
|
|
if (read(fp->fid, (char *) seg, (int) SIZE_MP_SEG) < 0) {
|
|
close(fp->fid);
|
|
Printf("mdb: cannot read core header\n");
|
|
fp->fid = -1;
|
|
return;
|
|
}
|
|
h_size = SIZE_HEADER;
|
|
|
|
/* Read kernel dependent info */
|
|
r = kernel_info(fp->fid);
|
|
if (r < 0) {
|
|
close(fp->fid);
|
|
Printf("mdb: cannot read kernel info from 'core' file\n");
|
|
fp->fid = -1;
|
|
return;
|
|
} else
|
|
h_size += r;
|
|
|
|
/* copy info */
|
|
for (i = T; i <= S; i++)
|
|
cnt[i] = (long) seg[i].mem_len << CLICK_SHIFT;
|
|
|
|
/* This needs to be set for map_addr() below */
|
|
if(coreonly && cnt[T] != 0) is_separate = TRUE;
|
|
|
|
st_addr = (long) seg[T].mem_vir << CLICK_SHIFT;
|
|
et_addr = st_addr + ((long) seg[T].mem_len << CLICK_SHIFT);
|
|
|
|
sd_addr = (long) seg[D].mem_vir << CLICK_SHIFT;
|
|
end_addr = ed_addr =
|
|
sd_addr + ((long) seg[D].mem_len << CLICK_SHIFT);
|
|
|
|
sk_addr = (long) seg[S].mem_vir << CLICK_SHIFT;
|
|
sk_size = (long) seg[S].mem_len << CLICK_SHIFT;
|
|
|
|
setmap(fp);
|
|
}
|
|
|
|
/* initialization for core files
|
|
* returns PC address from core file
|
|
*/
|
|
PUBLIC unsigned long core_init(filename)
|
|
char *filename;
|
|
{
|
|
core_file = &Core_File;
|
|
core_file->name = (filename != NULL) ? filename : def_name;
|
|
|
|
core_file->fid = open(core_file->name, 0);
|
|
if (filename != NULL && core_file->fid < 0) {
|
|
Printf("mdb - warning cannot open: %s\n", core_file->name);
|
|
return -1;
|
|
}
|
|
|
|
core_file->b1 = core_file->b2 = core_file->b3 = 0;
|
|
core_file->e1 = core_file->e2 = core_file->e3 = -1;
|
|
core_file->f1 = core_file->f2 = core_file->f3 = 0;
|
|
core_file->cblock = -1;
|
|
|
|
if (core_file->fid > 0) {
|
|
read_info(core_file);
|
|
return c_status();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* initialization for a file ( -f option )
|
|
* always returns 0
|
|
* Similar to core files.
|
|
*/
|
|
PUBLIC unsigned long file_init(filename)
|
|
char *filename;
|
|
{
|
|
core_file = &Core_File;
|
|
core_file->name = (filename != NULL) ? filename : def_name;
|
|
|
|
core_file->fid = open(core_file->name, 0);
|
|
if (filename != NULL && core_file->fid < 0) {
|
|
Printf("mdb - warning cannot open: %s\n", core_file->name);
|
|
return -1;
|
|
}
|
|
|
|
core_file->b1 = core_file->b2 = core_file->b3 = 0;
|
|
core_file->e1 = core_file->e2 = core_file->e3 = -1;
|
|
core_file->f1 = core_file->f2 = core_file->f3 = 0;
|
|
core_file->cblock = -1;
|
|
|
|
is_separate = FALSE;
|
|
core_file->e1 = file_size(core_file->fid);
|
|
curpid = corepid = 1;
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*
|
|
* Read from core file
|
|
* Called by mdbtrace()
|
|
*/
|
|
PUBLIC long read_core(req, addr, data)
|
|
int req;
|
|
long addr, data;
|
|
{
|
|
int i;
|
|
int segment;
|
|
long val;
|
|
|
|
switch (req) {
|
|
case T_GETINS:
|
|
case T_GETDATA:
|
|
/* Check segment and address - call getn to read core file */
|
|
segment = (req == T_GETINS) ? T : D;
|
|
addr &= MASK(ADDRSIZE);
|
|
val = getn(addr, segment);
|
|
#ifdef DEBUG
|
|
if (debug) Printf("val=>%lx\n", val);
|
|
#endif
|
|
return val;
|
|
break;
|
|
case T_GETUSER:
|
|
/* Convert addr to index to long array */
|
|
i = (int) (addr >> 2);
|
|
#ifdef DEBUG
|
|
if (debug) Printf("lbuf[%d] %lx\n", i, lbuf[i]);
|
|
#endif
|
|
return lbuf[i];
|
|
break;
|
|
case T_OK:
|
|
case T_EXIT:
|
|
return 0L;
|
|
break;
|
|
default:
|
|
mdb_error("Not supported with 'core' files\n");
|
|
}
|
|
}
|
|
|