From 5804ce3d46ef5792ea4aa53e1460c341137961e9 Mon Sep 17 00:00:00 2001 From: Peter Jones Date: Thu, 25 Jun 2015 11:59:09 -0400 Subject: [PATCH 2/6] Make efi machines load an env block from a variable Signed-off-by: Peter Jones --- grub-core/Makefile.core.def | 1 + grub-core/kern/efi/init.c | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 33 insertions(+) diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def index 38291ce..b3ba5ed 100644 --- a/grub-core/Makefile.core.def +++ b/grub-core/Makefile.core.def @@ -174,6 +174,7 @@ kernel = { efi = kern/efi/init.c; efi = kern/efi/mm.c; efi = term/efi/console.c; + efi = lib/envblk.c; x86 = kern/i386/tsc.c; diff --git a/grub-core/kern/efi/init.c b/grub-core/kern/efi/init.c index e9c85de..d17d18e 100644 --- a/grub-core/kern/efi/init.c +++ b/grub-core/kern/efi/init.c @@ -25,9 +25,40 @@ #include #include #include +#include grub_addr_t grub_modbase; +#define GRUB_EFI_GRUB_VARIABLE_GUID \ + { 0x91376aff, 0xcba6, 0x42be, \ + { 0x94, 0x9d, 0x06, 0xfd, 0xe8, 0x11, 0x28, 0xe8 } \ + } + +/* Helper for grub_efi_env_init */ +static int +set_var (const char *name, const char *value, + void *whitelist __attribute__((__unused__))) +{ + grub_env_set (name, value); + return 0; +} + +static void +grub_efi_env_init (void) +{ + grub_efi_guid_t efi_grub_guid = GRUB_EFI_GRUB_VARIABLE_GUID; + struct grub_envblk envblk_s = { NULL, 0 }; + grub_envblk_t envblk = &envblk_s; + + envblk_s.buf = grub_efi_get_variable ("GRUB_ENV", &efi_grub_guid, + &envblk_s.size); + if (!envblk_s.buf || envblk_s.size < 1) + return; + + grub_envblk_iterate (envblk, NULL, set_var); + grub_free (envblk_s.buf); +} + void grub_efi_init (void) { @@ -42,6 +73,7 @@ grub_efi_init (void) efi_call_4 (grub_efi_system_table->boot_services->set_watchdog_timer, 0, 0, 0, NULL); + grub_efi_env_init (); grub_efidisk_init (); } -- 2.4.3