diff --git sys/ddb/db_break.c sys/ddb/db_break.c
index dfe2f3af912..85354e32987 100644
--- sys/ddb/db_break.c
+++ sys/ddb/db_break.c
@@ -46,8 +46,8 @@
#define NBREAKPOINTS 100
struct db_breakpoint db_break_table[NBREAKPOINTS];
db_breakpoint_t db_next_free_breakpoint = &db_break_table[0];
-db_breakpoint_t db_free_breakpoints = 0;
-db_breakpoint_t db_breakpoint_list = 0;
+db_breakpoint_t db_free_breakpoints = NULL;
+db_breakpoint_t db_breakpoint_list = NULL;
db_breakpoint_t db_breakpoint_alloc(void);
void db_breakpoint_free(db_breakpoint_t);
@@ -60,13 +60,13 @@ db_breakpoint_alloc(void)
{
db_breakpoint_t bkpt;
- if ((bkpt = db_free_breakpoints) != 0) {
+ if ((bkpt = db_free_breakpoints) != NULL) {
db_free_breakpoints = bkpt->link;
return (bkpt);
}
if (db_next_free_breakpoint == &db_break_table[NBREAKPOINTS]) {
db_printf("All breakpoints used.\n");
- return (0);
+ return (NULL);
}
bkpt = db_next_free_breakpoint;
db_next_free_breakpoint++;
@@ -99,7 +99,7 @@ db_set_breakpoint(vaddr_t addr, int count)
#endif
bkpt = db_breakpoint_alloc();
- if (bkpt == 0) {
+ if (bkpt == NULL) {
db_printf("Too many breakpoints.\n");
return;
}
@@ -119,14 +119,14 @@ db_delete_breakpoint(vaddr_t addr)
db_breakpoint_t bkpt;
db_breakpoint_t *prev;
- for (prev = &db_breakpoint_list; (bkpt = *prev) != 0;
+ for (prev = &db_breakpoint_list; (bkpt = *prev) != NULL;
prev = &bkpt->link) {
if (bkpt->address == addr) {
*prev = bkpt->link;
break;
}
}
- if (bkpt == 0) {
+ if (bkpt == NULL) {
db_printf("Not set.\n");
return;
}
@@ -139,11 +139,11 @@ db_find_breakpoint(vaddr_t addr)
{
db_breakpoint_t bkpt;
- for (bkpt = db_breakpoint_list; bkpt != 0; bkpt = bkpt->link)
+ for (bkpt = db_breakpoint_list; bkpt != NULL; bkpt = bkpt->link)
if (bkpt->address == addr)
return (bkpt);
- return (0);
+ return (NULL);
}
int db_breakpoints_inserted = 1;
@@ -154,7 +154,8 @@ db_set_breakpoints(void)
db_breakpoint_t bkpt;
if (!db_breakpoints_inserted) {
- for (bkpt = db_breakpoint_list; bkpt != 0; bkpt = bkpt->link) {
+ for (bkpt = db_breakpoint_list; bkpt != NULL;
+ bkpt = bkpt->link) {
bkpt->bkpt_inst =
db_get_value(bkpt->address, BKPT_SIZE, 0);
db_put_value(bkpt->address, BKPT_SIZE,
@@ -170,7 +171,7 @@ db_clear_breakpoints(void)
db_breakpoint_t bkpt;
if (db_breakpoints_inserted) {
- for (bkpt = db_breakpoint_list; bkpt != 0; bkpt = bkpt->link)
+ for (bkpt = db_breakpoint_list; bkpt != NULL; bkpt = bkpt->link)
db_put_value(bkpt->address, BKPT_SIZE, bkpt->bkpt_inst);
db_breakpoints_inserted = 0;
}
@@ -194,9 +195,9 @@ db_set_temp_breakpoint(vaddr_t addr)
#endif
bkpt = db_breakpoint_alloc();
- if (bkpt == 0) {
+ if (bkpt == NULL) {
db_printf("Too many breakpoints.\n");
- return (0);
+ return (NULL);
}
bkpt->address = addr;
@@ -230,7 +231,7 @@ db_list_breakpoints(void)
}
db_printf(" Count Address\n");
- for (bkpt = db_breakpoint_list; bkpt != 0; bkpt = bkpt->link) {
+ for (bkpt = db_breakpoint_list; bkpt != NULL; bkpt = bkpt->link) {
db_printf(" %5d ", bkpt->init_count);
db_printsym(bkpt->address, DB_STGY_PROC, db_printf);
db_printf("\n");
diff --git sys/ddb/db_command.c sys/ddb/db_command.c
index 57f0b7c1257..0f1d8edecee 100644
--- sys/ddb/db_command.c
+++ sys/ddb/db_command.c
@@ -148,7 +148,7 @@ db_cmd_search(char *name, struct db_command *table, struct
db_command **cmdp)
struct db_command *cmd;
int result = CMD_NONE;
- for (cmd = table; cmd->name != 0; cmd++) {
+ for (cmd = table; cmd->name != NULL; cmd++) {
char *lp = name, *rp = cmd->name;
int c;
@@ -181,7 +181,7 @@ db_cmd_list(struct db_command *table)
{
struct db_command *cmd;
- for (cmd = table; cmd->name != 0; cmd++) {
+ for (cmd = table; cmd->name != NULL; cmd++) {
db_printf("%-12s", cmd->name);
db_end_line(12);
}
@@ -227,7 +227,7 @@ db_command(struct db_command **last_cmdp, struct db_command
*cmd_table)
default:
break;
}
- if ((cmd_table = cmd->more) != 0) {
+ if ((cmd_table = cmd->more) != NULL) {
t = db_read_token();
if (t != tIDENT) {
db_cmd_list(cmd_table);
@@ -280,7 +280,7 @@ db_command(struct db_command **last_cmdp, struct db_command
*cmd_table)
}
}
*last_cmdp = cmd;
- if (cmd != 0) {
+ if (cmd != NULL) {
/* Execute the command. */
(*cmd->fcn)(addr, have_addr, count, modif);
@@ -581,12 +581,12 @@ struct db_command db_show_cmds[] = {
};
struct db_command db_boot_cmds[] = {
- { "sync", db_boot_sync_cmd, 0, 0 },
- { "crash", db_boot_crash_cmd, 0, 0 },
- { "dump", db_boot_dump_cmd, 0, 0 },
- { "halt", db_boot_halt_cmd, 0, 0 },
- { "reboot", db_boot_reboot_cmd, 0, 0 },
- { "poweroff", db_boot_poweroff_cmd, 0, 0 },
+ { "sync", db_boot_sync_cmd, 0, NULL },
+ { "crash", db_boot_crash_cmd, 0, NULL },
+ { "dump", db_boot_dump_cmd, 0, NULL },
+ { "halt", db_boot_halt_cmd, 0, NULL },
+ { "reboot", db_boot_reboot_cmd, 0, NULL },
+ { "poweroff", db_boot_poweroff_cmd, 0, NULL },
{ NULL, }
};
@@ -846,7 +846,7 @@ db_show_regs(db_expr_t addr, int have_addr, db_expr_t
count, char *modif)
db_format(tmpfmt, sizeof tmpfmt,
(long)value, DB_FORMAT_N, 1, sizeof(long) * 3));
db_find_xtrn_sym_and_offset((vaddr_t)value, &name, &offset);
- if (name != 0 && offset <= db_maxoff && offset != value) {
+ if (name != NULL && offset <= db_maxoff && offset != value) {
db_printf("\t%s", name);
if (offset != 0)
db_printf("+%s",
diff --git sys/ddb/db_hangman.c sys/ddb/db_hangman.c
index e73bd032f1a..3c298d2c323 100644
--- sys/ddb/db_hangman.c
+++ sys/ddb/db_hangman.c
@@ -100,7 +100,7 @@ db_randomsym(size_t *lenp)
dfa.cnt = arc4random_uniform(nsyms);
db_elf_sym_forall(db_hang_forall, &dfa);
- db_symbol_values(dfa.sym, &q, 0);
+ db_symbol_values(dfa.sym, &q, NULL);
/* strlen(q) && ignoring underscores and colons */
for ((*lenp) = 0, p = q; *p; p++)
diff --git sys/ddb/db_output.c sys/ddb/db_output.c
index d6abed2745b..9d4da2c5720 100644
--- sys/ddb/db_output.c
+++ sys/ddb/db_output.c
@@ -130,7 +130,7 @@ db_more(void)
while (*p)
cnputc(*p++);
if (quit_output) {
- db_error(0);
+ db_error(NULL);
/* NOTREACHED */
}
}
diff --git sys/ddb/db_watch.c sys/ddb/db_watch.c
index cae2307f7d9..b9e96ec0051 100644
--- sys/ddb/db_watch.c
+++ sys/ddb/db_watch.c
@@ -53,21 +53,21 @@ int db_watchpoints_inserted = 1;
#define NWATCHPOINTS 100
struct db_watchpoint db_watch_table[NWATCHPOINTS];
db_watchpoint_t db_next_free_watchpoint = &db_watch_table[0];
-db_watchpoint_t db_free_watchpoints = 0;
-db_watchpoint_t db_watchpoint_list = 0;
+db_watchpoint_t db_free_watchpoints = NULL;
+db_watchpoint_t db_watchpoint_list = NULL;
db_watchpoint_t
db_watchpoint_alloc(void)
{
db_watchpoint_t watch;
- if ((watch = db_free_watchpoints) != 0) {
+ if ((watch = db_free_watchpoints) != NULL) {
db_free_watchpoints = watch->link;
return (watch);
}
if (db_next_free_watchpoint == &db_watch_table[NWATCHPOINTS]) {
db_printf("All watchpoints used.\n");
- return (0);
+ return (NULL);
}
watch = db_next_free_watchpoint;
db_next_free_watchpoint++;
@@ -91,14 +91,14 @@ db_set_watchpoint(vaddr_t addr, vsize_t size)
* Should we do anything fancy with overlapping regions?
*/
- for (watch = db_watchpoint_list; watch != 0; watch = watch->link)
+ for (watch = db_watchpoint_list; watch != NULL; watch = watch->link)
if (watch->loaddr == addr && watch->hiaddr == addr + size) {
db_printf("Already set.\n");
return;
}
watch = db_watchpoint_alloc();
- if (watch == 0) {
+ if (watch == NULL) {
db_printf("Too many watchpoints.\n");
return;
}
@@ -118,7 +118,7 @@ db_delete_watchpoint(vaddr_t addr)
db_watchpoint_t watch;
db_watchpoint_t *prev;
- for (prev = &db_watchpoint_list; (watch = *prev) != 0;
+ for (prev = &db_watchpoint_list; (watch = *prev) != NULL;
prev = &watch->link)
if (watch->loaddr <= addr && addr < watch->hiaddr) {
*prev = watch->link;
@@ -134,13 +134,13 @@ db_list_watchpoints(void)
{
db_watchpoint_t watch;
- if (db_watchpoint_list == 0) {
+ if (db_watchpoint_list == NULL) {
db_printf("No watchpoints set\n");
return;
}
db_printf(" Address Size\n");
- for (watch = db_watchpoint_list; watch != 0; watch = watch->link)
+ for (watch = db_watchpoint_list; watch != NULL; watch = watch->link)
db_printf("%8lx %lx\n",
watch->loaddr, watch->hiaddr - watch->loaddr);
}
@@ -184,7 +184,7 @@ db_set_watchpoints(void)
db_watchpoint_t watch;
if (!db_watchpoints_inserted && db_watchpoint_list != NULL) {
- for (watch = db_watchpoint_list; watch != 0;
+ for (watch = db_watchpoint_list; watch != NULL;
watch = watch->link)
pmap_protect(pmap_kernel(), trunc_page(watch->loaddr),
round_page(watch->hiaddr), PROT_READ);
