Hi, I am currently debugging an UEFI boot problem. A hexdump in the boot loader would be convenient.
boot> hexdump 0x10 20 00000010 53 ff 00 f0 54 ff 00 f0 53 ff 00 f0 53 ff 00 f0 |S...T...S...S...| 00000020 a5 fe 00 f0 |....| 00000024 Do we want such a feature? If so, I would adapt the other's architectures Makefiles. bluhm Index: arch/amd64/stand/boot/Makefile =================================================================== RCS file: /data/mirror/openbsd/cvs/src/sys/arch/amd64/stand/boot/Makefile,v retrieving revision 1.43 diff -u -p -r1.43 Makefile --- arch/amd64/stand/boot/Makefile 29 Oct 2019 02:55:50 -0000 1.43 +++ arch/amd64/stand/boot/Makefile 26 Nov 2019 22:19:50 -0000 @@ -32,7 +32,8 @@ SRCS+= softraid_amd64.c .endif .PATH: ${S}/lib/libsa -SRCS+= alloc.c ctime.c exit.c getchar.c memcmp.c memcpy.c memmove.c memset.c printf.c \ +SRCS+= alloc.c ctime.c exit.c hexdump.c getchar.c \ + memcmp.c memcpy.c memmove.c memset.c printf.c \ putchar.c snprintf.c strcmp.c strerror.c strlen.c strncmp.c strncpy.c \ strtol.c strtoll.c SRCS+= close.c closeall.c cons.c cread.c dev.c disklabel.c dkcksum.c fchmod.c \ Index: arch/amd64/stand/efiboot/Makefile.common =================================================================== RCS file: /data/mirror/openbsd/cvs/src/sys/arch/amd64/stand/efiboot/Makefile.common,v retrieving revision 1.18 diff -u -p -r1.18 Makefile.common --- arch/amd64/stand/efiboot/Makefile.common 29 Oct 2019 02:55:51 -0000 1.18 +++ arch/amd64/stand/efiboot/Makefile.common 26 Nov 2019 21:57:05 -0000 @@ -32,7 +32,8 @@ SRCS+= memprobe.c SRCS+= boot.c bootarg.c cmd.c vars.c .PATH: ${S}/lib/libsa -SRCS+= alloc.c ctime.c exit.c getchar.c memcmp.c memcpy.c memmove.c memset.c printf.c \ +SRCS+= alloc.c ctime.c exit.c hexdump.c getchar.c \ + memcmp.c memcpy.c memmove.c memset.c printf.c \ putchar.c snprintf.c strcmp.c strerror.c strlen.c strncmp.c strncpy.c \ strtol.c strtoll.c SRCS+= close.c closeall.c cons.c cread.c dev.c disklabel.c dkcksum.c \ Index: lib/libsa/hexdump.c =================================================================== RCS file: lib/libsa/hexdump.c diff -N lib/libsa/hexdump.c --- /dev/null 1 Jan 1970 00:00:00 -0000 +++ lib/libsa/hexdump.c 26 Nov 2019 22:17:53 -0000 @@ -0,0 +1,52 @@ +/* $OpenBSD$ */ +/* + * Copyright (c) 2019 Alexander Bluhm <bl...@openbsd.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <sys/types.h> + +#include "stand.h" + +void +hexdump(const void *addr, size_t size) +{ + const unsigned char *line, *end; + int byte; + + end = (const char *)addr + size; + for (line = addr; line < end; line += 16) { + printf("%08x ", line); + for (byte = 0; byte < 16; byte++) { + if (&line[byte] < end) + printf("%02x ", line[byte]); + else + printf(" "); + if (byte == 7) + printf(" "); + } + printf(" |"); + for (byte = 0; byte < 16; byte++) { + if (&line[byte] < end) { + if (line[byte] >= ' ' && line[byte] <= '~') + printf("%c", line[byte]); + else + printf("."); + } else + break; + } + printf("|\n"); + } + printf("%08x\n", end); +} Index: lib/libsa/stand.h =================================================================== RCS file: /data/mirror/openbsd/cvs/src/sys/lib/libsa/stand.h,v retrieving revision 1.68 diff -u -p -r1.68 stand.h --- lib/libsa/stand.h 1 Nov 2019 20:54:52 -0000 1.68 +++ lib/libsa/stand.h 26 Nov 2019 21:57:05 -0000 @@ -146,6 +146,7 @@ __dead void _rtt(void) __attribute__((no #define bcmp(s1,s2,n) (memcmp((s2),(s1),(n))) #define bcopy(s1,s2,n) ((void)memmove((s2),(s1),(n))) void explicit_bzero(void *, size_t); +void hexdump(const void *, size_t); void *memcpy(void *, const void *, size_t); void *memmove(void *, const void *, size_t); int memcmp(const void *, const void *, size_t); Index: stand/boot/cmd.c =================================================================== RCS file: /data/mirror/openbsd/cvs/src/sys/stand/boot/cmd.c,v retrieving revision 1.65 diff -u -p -r1.65 cmd.c --- stand/boot/cmd.c 3 Aug 2019 15:22:19 -0000 1.65 +++ stand/boot/cmd.c 26 Nov 2019 21:57:05 -0000 @@ -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}, @@ -345,6 +347,51 @@ Xhelp(void) #else return 0; #endif +} + +static int +Xhexdump(void) +{ + unsigned long val[2]; + const unsigned char *p; + unsigned int n, b, d; + + if (cmd.argc != 3) { + printf("hexdump addr size\n"); + return 0; + } + + for (n = 1; n < cmd.argc; n++) { + p = cmd.argv[n]; + if (*p == '0') { + p++; + if (*p == 'x' || *p == 'X') { + p++; + b = 16; + } else + b = 8; + } else + b = 10; + val[n-1] = 0; + for (; *p != '\0'; p++) { + if (*p >= '0' && *p <= '9') + d = *p - '0'; + else if (*p >= 'a' && *p <= 'z') + d = *p - 'a' + 10; + else if (*p >= 'A' && *p <= 'Z') + d = *p - 'A' + 10; + else + goto err; + if (d >= b) + goto err; + val[n-1] = val[n-1] * b + d; + } + } + hexdump((void *)val[0], val[1]); + return 0; + err: + printf("bad '%c' in \"%s\"\n", *p, cmd.argv[n]); + return 0; } #ifdef MACHINE_CMD