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Enhance the ddb examine (x) command.

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* Change x/a to work similar to gdb.  The content of the memory is
  treated as an address, printed symbolically and the address is advanced.
  This way you can x/a <stack_address> and then just hit return a bunch
  of times to locate useful data on the stack.

* Add x/p.  The content of the memory is treated as an address and
  printed as hex.

This is based on the similar commit from DragonFlyBSD without the
cosmetic changes.

Relnotes:	yes
Obtained from:	DragonflyBSD (Matthew Dillon)
Reference:	0624d20e86affcd708609cbf9014207537537a72
This commit is contained in:
pfg 2016-05-02 19:32:06 +00:00
parent f80f60242e
commit 3b54164db1
1 changed files with 13 additions and 10 deletions
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23
sys/ddb/db_examine.c
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@ -89,15 +89,6 @@ db_examine(db_addr_t addr, char *fmt, int count)
case 'g':
size = 8;
break;
case 'a': /* address */
size = sizeof(void *);
/* always forces a new line */
if (db_print_position() != 0)
db_printf("\n");
db_prev = addr;
db_printsym(addr, DB_STGY_ANY);
db_printf(":\t");
break;
default:
if (db_print_position() == 0) {
/* Print the address. */
@ -108,6 +99,18 @@ db_examine(db_addr_t addr, char *fmt, int count)
width = size * 4;
switch (c) {
case 'a': /* address */
size = sizeof(void *);
value = db_get_value(addr, size, TRUE);
addr += size;
db_printsym(value, DB_STGY_ANY);
break;
case 'p':
size = sizeof(void *);
value = db_get_value(addr, size, TRUE);
addr += size;
db_printf("%p", (void *)value);
break;
case 'r': /* signed, current radix */
value = db_get_value(addr, size, true);
addr += size;
@ -173,7 +176,7 @@ db_examine(db_addr_t addr, char *fmt, int count)
default:
break;
}
if (db_print_position() != 0)
if (db_print_position() != 0 || c == 'a' || c == 'p')
db_end_line(1);
break;
}