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diff --git a/sys/amd64/amd64/db_trace.c b/sys/amd64/amd64/db_trace.c
--- a/sys/amd64/amd64/db_trace.c
+++ b/sys/amd64/amd64/db_trace.c
@@ -218,7 +218,7 @@
break;
case SYSCALL:
db_printf("--- syscall");
- db_decode_syscall(tf->tf_rax, td);
+ db_decode_syscall(td, tf->tf_rax);
break;
case INTERRUPT:
db_printf("--- interrupt");
diff --git a/sys/ddb/db_sym.h b/sys/ddb/db_sym.h
--- a/sys/ddb/db_sym.h
+++ b/sys/ddb/db_sym.h
@@ -105,6 +105,6 @@
void X_db_symbol_values(db_symtab_t *symtab, c_db_sym_t sym,
const char **namep, db_expr_t *valuep);
-void db_decode_syscall(int number, struct thread *td);
+void db_decode_syscall(struct thread *td, u_int number);
#endif /* !_DDB_DB_SYM_H_ */
diff --git a/sys/ddb/db_sym.c b/sys/ddb/db_sym.c
--- a/sys/ddb/db_sym.c
+++ b/sys/ddb/db_sym.c
@@ -485,23 +485,15 @@
}
void
-db_decode_syscall(int number, struct thread *td)
+db_decode_syscall(struct thread *td, u_int number)
{
struct proc *p;
- c_db_sym_t sym;
- db_expr_t diff;
- sy_call_t *f;
- const char *symname;
- db_printf(" (%d", number);
+ db_printf(" (%u", number);
p = (td != NULL) ? td->td_proc : NULL;
- if (p != NULL && 0 <= number && number < p->p_sysent->sv_size) {
- f = p->p_sysent->sv_table[number].sy_call;
- sym = db_search_symbol((db_addr_t)f, DB_STGY_ANY, &diff);
- if (sym != DB_SYM_NULL && diff == 0) {
- db_symbol_values(sym, &symname, NULL);
- db_printf(", %s, %s", p->p_sysent->sv_name, symname);
- }
+ if (p != NULL) {
+ db_printf(", %s, %s", p->p_sysent->sv_name,
+ syscallname(p, number));
}
db_printf(")");
}
diff --git a/sys/i386/i386/db_trace.c b/sys/i386/i386/db_trace.c
--- a/sys/i386/i386/db_trace.c
+++ b/sys/i386/i386/db_trace.c
@@ -372,7 +372,7 @@
break;
case SYSCALL:
db_printf("--- syscall");
- db_decode_syscall(tf->tf_eax, td);
+ db_decode_syscall(td, tf->tf_eax);
break;
case INTERRUPT:
db_printf("--- interrupt");
diff --git a/sys/riscv/riscv/db_trace.c b/sys/riscv/riscv/db_trace.c
--- a/sys/riscv/riscv/db_trace.c
+++ b/sys/riscv/riscv/db_trace.c
@@ -97,7 +97,7 @@
tf->tf_scause & SCAUSE_CODE);
} else if (tf->tf_scause == SCAUSE_ECALL_USER) {
db_printf("--- syscall");
- db_decode_syscall(td->td_sa.code, td);
+ db_decode_syscall(td, td->td_sa.code);
db_printf("\n");
} else {
db_printf("--- exception %ld, tval = %#lx\n",

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