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| author | Alexey Dokuchaev <danfe@nsu.ru> | 2017-11-30 16:27:48 +0100 |
|---|---|---|
| committer | Jean Delvare <jdelvare@suse.de> | 2017-11-30 16:27:48 +0100 |
| commit | e629bccb2ced5f9e52e142bd841d310434975c63 (patch) | |
| tree | 12deb209c8ee61472e1344456eabf72071bc1c74 | |
| parent | 6517fa7c8c8a74a9eae9e6192de316ef8952f2a8 (diff) | |
| download | dmidecode-git-e629bccb2ced5f9e52e142bd841d310434975c63.tar.gz | |
UEFI support on FreeBSD
Currently, dmidecode(8) does not work on FreeBSD booted in UEFI mode.
Previously it was understandable, since there are no things like Linuxish
/proc/efi/systab or /sys/firmware/efi/systab to read from under FreeBSD.
However, 7 months ago, ambrisko@ had added support for exposing the SMBIOS
anchor base address via kernel environment:
https://svnweb.freebsd.org/base?view=revision&revision=307326
I've patched dmidecode.c to try to get the address from hint.smbios.0.mem
and fall back to traditional address space scanning. I've tested it both
on EFI (amd64 laptop) and non-EFI (i386 desktop) machines.
| -rw-r--r-- | dmidecode.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/dmidecode.c b/dmidecode.c index 6559567..aadef75 100644 --- a/dmidecode.c +++ b/dmidecode.c @@ -64,6 +64,11 @@ #include <stdlib.h> #include <unistd.h> +#ifdef __FreeBSD__ +#include <errno.h> +#include <kenv.h> +#endif + #include "version.h" #include "config.h" #include "types.h" @@ -4934,13 +4939,18 @@ static int legacy_decode(u8 *buf, const char *devmem, u32 flags) #define EFI_NO_SMBIOS (-2) static int address_from_efi(off_t *address) { +#if defined(__linux__) FILE *efi_systab; const char *filename; char linebuf[64]; +#elif defined(__FreeBSD__) + char addrstr[KENV_MVALLEN + 1]; +#endif int ret; *address = 0; /* Prevent compiler warning */ +#if defined(__linux__) /* * Linux up to 2.6.6: /proc/efi/systab * Linux 2.6.7 and up: /sys/firmware/efi/systab @@ -4972,6 +4982,29 @@ static int address_from_efi(off_t *address) if (ret == EFI_NO_SMBIOS) fprintf(stderr, "%s: SMBIOS entry point missing\n", filename); +#elif defined(__FreeBSD__) + /* + * On FreeBSD, SMBIOS anchor base address in UEFI mode is exposed + * via kernel environment: + * https://svnweb.freebsd.org/base?view=revision&revision=307326 + */ + ret = kenv(KENV_GET, "hint.smbios.0.mem", addrstr, sizeof(addrstr)); + if (ret == -1) + { + if (errno != ENOENT) + perror("kenv"); + return EFI_NOT_FOUND; + } + + *address = strtoull(addrstr, NULL, 0); + if (!(opt.flags & FLAG_QUIET)) + printf("# SMBIOS entry point at 0x%08llx\n", + (unsigned long long)*address); + + ret = 0; +#else + ret = EFI_NOT_FOUND; +#endif return ret; } |