diff options
Diffstat (limited to 'lib/smbios-parser.c')
-rw-r--r-- | lib/smbios-parser.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/lib/smbios-parser.c b/lib/smbios-parser.c index b89f988ef9..34203f952c 100644 --- a/lib/smbios-parser.c +++ b/lib/smbios-parser.c @@ -3,6 +3,8 @@ * Copyright (C) 2020, Bachmann electronic GmbH */ +#define LOG_CATEGORY LOGC_BOOT + #include <common.h> #include <smbios.h> @@ -94,3 +96,39 @@ const char *smbios_string(const struct smbios_header *header, int index) return string_from_smbios_table(header, index); } + +int smbios_update_version_full(void *smbios_tab, const char *version) +{ + const struct smbios_header *hdr; + struct smbios_type0 *bios; + uint old_len, len; + char *ptr; + + log_info("Updating SMBIOS table at %p\n", smbios_tab); + hdr = smbios_header(smbios_tab, SMBIOS_BIOS_INFORMATION); + if (!hdr) + return log_msg_ret("tab", -ENOENT); + bios = (struct smbios_type0 *)hdr; + ptr = (char *)smbios_string(hdr, bios->bios_ver); + if (!ptr) + return log_msg_ret("str", -ENOMEDIUM); + + /* + * This string is supposed to have at least enough bytes and is + * padded with spaces. Update it, taking care not to move the + * \0 terminator, so that other strings in the string table + * are not disturbed. See smbios_add_string() + */ + old_len = strnlen(ptr, SMBIOS_STR_MAX); + len = strnlen(version, SMBIOS_STR_MAX); + if (len > old_len) + return log_ret(-ENOSPC); + + log_debug("Replacing SMBIOS type 0 version string '%s'\n", ptr); + memcpy(ptr, version, len); +#ifdef LOG_DEBUG + print_buffer((ulong)ptr, ptr, 1, old_len + 1, 0); +#endif + + return 0; +} |