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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Mon, 7 Dec 2015 14:20:49 -0500
Subject: [PATCH] Make efi machines load an env block from a variable
Signed-off-by: Peter Jones <pjones@redhat.com>
---
grub-core/Makefile.core.def | 1 +
grub-core/kern/efi/init.c | 36 +++++++++++++++++++++++++++++++++++-
2 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 45d3edaa4dc..c865a08b027 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -207,6 +207,7 @@ kernel = {
efi = kern/efi/acpi.c;
efi = kern/efi/sb.c;
efi = kern/lockdown.c;
+ efi = lib/envblk.c;
i386_coreboot = kern/i386/pc/acpi.c;
i386_multiboot = kern/i386/pc/acpi.c;
i386_coreboot = kern/acpi.c;
diff --git a/grub-core/kern/efi/init.c b/grub-core/kern/efi/init.c
index 7facacf09c7..6d39bd3ad29 100644
--- a/grub-core/kern/efi/init.c
+++ b/grub-core/kern/efi/init.c
@@ -27,8 +27,11 @@
#include <grub/env.h>
#include <grub/mm.h>
#include <grub/kernel.h>
+
#include <grub/stack_protector.h>
+#include <grub/lib/envblk.h>
+
#ifdef GRUB_STACK_PROTECTOR
static grub_efi_guid_t rng_protocol_guid = GRUB_EFI_RNG_PROTOCOL_GUID;
@@ -82,6 +85,36 @@ stack_protector_init (void)
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;
+
+ grub_efi_get_variable ("GRUB_ENV", &efi_grub_guid, &envblk_s.size,
+ (void **) &envblk_s.buf);
+ 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)
{
@@ -108,10 +141,11 @@ 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 ();
}
-void (*grub_efi_net_config) (grub_efi_handle_t hnd,
+void (*grub_efi_net_config) (grub_efi_handle_t hnd,
char **device,
char **path);