diff options
| author | Alexander Bluhm <bluhm@cvs.openbsd.org> | 2019-11-28 00:17:14 +0000 |
|---|---|---|
| committer | Alexander Bluhm <bluhm@cvs.openbsd.org> | 2019-11-28 00:17:14 +0000 |
| commit | ca53f2e86f998d94cd315ce272f8678030128ea3 (patch) | |
| tree | 50ec25d2e5d1306ac3b844c89e0f2ca6b03134ba /sys/stand | |
| parent | 5e22f15993801e613c6031b049bafc2c64a175ec (diff) | |
Implement a hexdump command in the boot loader. This helps to
inspect the memory layout that the firmware has created. It is
especially useful for UEFI debugging.
OK deraadt@ kettenis@
Diffstat (limited to 'sys/stand')
| -rw-r--r-- | sys/stand/boot/cmd.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/sys/stand/boot/cmd.c b/sys/stand/boot/cmd.c index a03b7d662aa..d9e7ba76e28 100644 --- a/sys/stand/boot/cmd.c +++ b/sys/stand/boot/cmd.c @@ -1,4 +1,4 @@ -/* $OpenBSD: cmd.c,v 1.65 2019/08/03 15:22:19 deraadt Exp $ */ +/* $OpenBSD: cmd.c,v 1.66 2019/11/28 00:17:13 bluhm Exp $ */ /* * Copyright (c) 1997-1999 Michael Shalayeff @@ -39,6 +39,7 @@ static int Xboot(void); static int Xecho(void); static int Xhelp(void); +static int Xhexdump(void); static int Xls(void); static int Xnop(void); static int Xreboot(void); @@ -62,6 +63,7 @@ const struct cmd_table cmd_table[] = { {"echo", CMDT_CMD, Xecho}, {"env", CMDT_CMD, Xenv}, {"help", CMDT_CMD, Xhelp}, + {"hexdump",CMDT_CMD, Xhexdump}, {"ls", CMDT_CMD, Xls}, #ifdef MACHINE_CMD {"machine",CMDT_MDC, Xmachine}, @@ -347,6 +349,29 @@ Xhelp(void) #endif } +static int +Xhexdump(void) +{ + long long val[2]; + char *ep; + int i; + + if (cmd.argc != 3) { + printf("hexdump addr size\n"); + return 0; + } + + for (i = 1; i < cmd.argc; i++) { + val[i-1] = strtoll(cmd.argv[i], &ep, 0); + if (cmd.argv[i][0] == '\0' || *ep != '\0') { + printf("bad '%c' in \"%s\"\n", *ep, cmd.argv[i]); + return 0; + } + } + hexdump((void *)val[0], val[1]); + return 0; +} + #ifdef MACHINE_CMD static int Xmachine(void) |