diff options
Diffstat (limited to 'cbtable.c')
| -rw-r--r-- | cbtable.c | 80 |
1 files changed, 80 insertions, 0 deletions
@@ -25,6 +25,7 @@ #include <unistd.h> #include <stdio.h> #include <stdlib.h> +#include <ctype.h> #include <string.h> #include "flash.h" #include "programmer.h" @@ -32,6 +33,9 @@ char *lb_part = NULL, *lb_vendor = NULL; int partvendor_from_cbtable = 0; +static char *def_name = "DEFAULT"; +static char *mainboard_vendor = NULL; +static char *mainboard_part = NULL; /* Parse the [<vendor>:]<board> string specified by the user as part of * -p internal:mainboard=[<vendor>:]<board> and set lb_vendor and lb_part @@ -56,6 +60,82 @@ void lb_vendor_dev_from_string(const char *boardstring) free(tempstr); } +int show_id(uint8_t *bios, int size) +{ + unsigned int *walk; + unsigned int mb_part_offset, mb_vendor_offset; + char *mb_part, *mb_vendor; + + mainboard_vendor = def_name; + mainboard_part = def_name; + + walk = (unsigned int *)(bios + size - 0x10); + walk--; + + if ((*walk) == 0 || ((*walk) & 0x3ff) != 0) { + /* We might have an NVIDIA chipset BIOS which stores the ID information somewhere else. */ + walk = (unsigned int *)(bios + size - 0x80); + walk--; + } + + /* + * Check if coreboot last image size is 0 or not a multiple of 1k or + * bigger than the chip or if the pointers to vendor ID or mainboard ID + * are outside the image of if the start of ID strings are nonsensical + * (nonprintable and not \0). + */ + mb_part_offset = *(walk - 1); + mb_vendor_offset = *(walk - 2); + if ((*walk) == 0 || ((*walk) & 0x3ff) != 0 || (*walk) > size || + mb_part_offset > size || mb_vendor_offset > size) { + msg_pinfo("Flash image seems to be a legacy BIOS. Disabling coreboot-related checks.\n"); + return 0; + } + + mb_part = (char *)(bios + size - mb_part_offset); + mb_vendor = (char *)(bios + size - mb_vendor_offset); + if (!isprint((unsigned char)*mb_part) || + !isprint((unsigned char)*mb_vendor)) { + msg_pinfo("Flash image seems to have garbage in the ID location. Disabling checks.\n"); + return 0; + } + + msg_pdbg("coreboot last image size (not ROM size) is %d bytes.\n", *walk); + + mainboard_part = strdup(mb_part); + mainboard_vendor = strdup(mb_vendor); + msg_pdbg("Manufacturer: %s\n", mainboard_vendor); + msg_pdbg("Mainboard ID: %s\n", mainboard_part); + + /* If these are not set, the coreboot table was not found. */ + if (!lb_vendor || !lb_part) { + msg_pinfo("Note: If the following flash access fails, try " + "-p internal:mainboard=<vendor>:<mainboard>.\n"); + return 0; + } + + /* These comparisons are case insensitive to make things a little less user^Werror prone. */ + if (!strcasecmp(mainboard_vendor, lb_vendor) && + !strcasecmp(mainboard_part, lb_part)) { + msg_pdbg("This firmware image matches this mainboard.\n"); + } else { + if (force_boardmismatch) { + msg_pinfo("WARNING: This firmware image does not " + "seem to fit to this machine - forcing it.\n"); + } else { + msg_pinfo("ERROR: Your firmware image (%s:%s) does not appear to\n" + " be correct for the detected mainboard (%s:%s)\n\n" + "Override with -p internal:boardmismatch=force to ignore the board name\n" + "in the firmware image or override the detected mainboard with\n" + "-p internal:mainboard=<vendor>:<mainboard>.\n\n", + mainboard_vendor, mainboard_part, lb_vendor, lb_part); + return 1; + } + } + + return 0; +} + static unsigned long compute_checksum(void *addr, unsigned long length) { uint8_t *ptr; |