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Add a generic hexdump tool for debugging purposes.

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This commit is contained in:
Mike Smith 1998-09-19 01:31:28 +00:00
parent 66411419a6
commit acd1d918fe
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=39472
2 changed files with 43 additions and 2 deletions
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3
sys/boot/common/bootstrap.h
View File

@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: bootstrap.h,v 1.4 1998/09/04 02:43:26 msmith Exp $
* $Id: bootstrap.h,v 1.5 1998/09/14 18:27:04 msmith Exp $
*/
#include <sys/types.h>
@ -65,6 +65,7 @@ extern int autoboot(int delay, char *prompt);
/* misc.c */
extern char *unargv(int argc, char *argv[]);
extern void hexdump(caddr_t region, size_t len);
extern size_t strlenout(vm_offset_t str);
extern char *strdupout(vm_offset_t str);

42
sys/boot/common/misc.c
View File

@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: misc.c,v 1.1.1.1 1998/08/21 03:17:41 msmith Exp $
* $Id: misc.c,v 1.2 1998/09/03 02:10:07 msmith Exp $
*/
#include <string.h>
@ -87,3 +87,43 @@ strdupout(vm_offset_t str)
}
return(result);
}
/*
* Display a region in traditional hexdump format.
*/
void
hexdump(caddr_t region, size_t len)
{
caddr_t line;
int x, c;
char lbuf[80];
#define emit(fmt, args...) {sprintf(lbuf, fmt , ## args); pager_output(lbuf);}
pager_open();
for (line = region; line < (region + len); line += 16) {
emit("%08x ", line);
for (x = 0; x < 16; x++) {
if ((line + x) < (region + len)) {
emit("%02x ", *(u_int8_t *)(line + x));
} else {
emit("-- ");
}
if (x == 7)
emit(" ");
}
emit(" |");
for (x = 0; x < 16; x++) {
if ((line + x) < (region + len)) {
c = *(u_int8_t *)(line + x);
if ((c < ' ') || (c > '~')) /* !isprint(c) */
c = '.';
emit("%c", c);
} else {
emit(" ");
}
}
emit("|\n");
}
pager_close();
}