Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added to code fixup the pc on entry to the debugger. 

Added funtions for software single stepping.
This commit is contained in:
mark 1996-03-06 23:01:49 +00:00
parent e6e9c2985e
commit f380bafdee
1 changed files with 29 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
sys/arch/arm32/arm32/db_interface.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: db_interface.c,v 1.2 1996/02/22 22:38:48 mark Exp $ */
/* $NetBSD: db_interface.c,v 1.3 1996/03/06 23:01:49 mark Exp $ */
/*
* Copyright (c) 1996 Scott K. Stevens
@ -28,8 +28,6 @@
* rights to redistribute these changes.
*
* From: db_interface.c,v 2.4 1991/02/05 17:11:13 mrt (CMU)
*
* $Id: db_interface.c,v 1.2 1996/02/22 22:38:48 mark Exp $
*/
/*
@ -126,7 +124,7 @@ kdb_trap(type, tf)
case -1: /* keyboard interrupt */
break;
default:
printf("kernel: trap");
db_printf("kernel: trap");
if (db_recover != 0) {
db_error("Faulted in DDB; continuing...\n");
/*NOTREACHED*/
@ -136,6 +134,7 @@ kdb_trap(type, tf)
/* Should switch to kdb`s own stack here. */
ddb_regs.ddb_tf = *tf;
ddb_regs.ddb_tf.tf_pc -= 4;
db_active++;
cnpollc(TRUE);
@ -217,7 +216,6 @@ db_write_bytes(addr, size, data)
*dst = *data;
dst++, data++;
}
}
int
@ -226,8 +224,15 @@ Debugger()
asm(".word 0xe7ffffff");
}
void db_show_vmstat_cmd __P((db_expr_t addr, int have_addr, db_expr_t count, char *modif));
void db_show_fs_cmd __P((db_expr_t addr, int have_addr, db_expr_t count, char *modif));
void db_show_vnode_cmd __P((db_expr_t addr, int have_addr, db_expr_t count, char *modif));
struct db_command arm32_db_command_table[] = {
{ (char *)0, }
{ "vmstat", db_show_vmstat_cmd, 0, NULL },
{ "fs", db_show_fs_cmd, 0, NULL },
{ "vnode", db_show_vnode_cmd, 0, NULL },
{ NULL, NULL, 0, NULL }
};
int
@ -236,7 +241,7 @@ db_trapper(addr, inst, frame)
u_int inst;
trapframe_t *frame;
{
printf("db_trapper\n");
/* db_printf("db_trapper\n");*/
kdb_trap(1, frame);
return(0);
}
@ -256,7 +261,7 @@ db_machine_init()
*/
if (kernexec->a_syms == 0) {
printf("(no syms) ");
printf("[No symbol table]\n");
} else {
esym = (int)&end + kernexec->a_syms + sizeof(int);
len = *((u_int *)esym);
@ -266,3 +271,19 @@ db_machine_init()
install_coproc_handler(0, db_trapper);
db_machine_commands_install(arm32_db_command_table);
}
u_int
branch_taken(insn, pc, reg, db_regs)
u_int insn;
u_int pc;
u_int reg;
db_regs_t *db_regs;
{
int branch;
branch = ((insn << 2) & 0x03ffffff);
if (branch & 0x02000000)
branch |= 0xfc000000;
return(pc + 8 + branch);
}