package/boot/grub2/applesetos.patch

   1 # --- T2-COPYRIGHT-NOTE-BEGIN ---
   2 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
   3 #
   4 # T2 SDE: package/.../grub2/applesetos.patch
   5 # Copyright (C) 2017 - 2019 The T2 SDE Project
   6 #
   7 # More information can be found in the files COPYING and README.
   8 #
   9 # This patch file is dual-licensed. It is available under the license the
  10 # patched project is licensed under, as long as it is an OpenSource license
  11 # as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
  12 # of the GNU General Public License as published by the Free Software
  13 # Foundation; either version 2 of the License, or (at your option) any later
  14 # version.
  15 # --- T2-COPYRIGHT-NOTE-END ---
  16
  17 The EFI on current macbooks configures hardware differently depending
  18 on wether it is booting Mac OS X or a different os, for example
  19 disabling the internal GPU completely on some models.
  20
  21 Mac OS X identifies itself using a custom EFI protocol.
  22
  23 This adds a command that fakes the os identification, making all
  24 hardware accessible.
  25
  26 ---
  27  grub-core/Makefile.core.def         |  6 +++
  28  grub-core/commands/efi/applesetos.c | 82 +++++++++++++++++++++++++++++++++++++
  29  2 files changed, 88 insertions(+)
  30  create mode 100644 grub-core/commands/efi/applesetos.c
  31
  32 diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
  33 index 42443bc..dc9c4de 100644
  34 --- a/grub-core/Makefile.core.def
  35 +++ b/grub-core/Makefile.core.def
  36 @@ -742,6 +742,12 @@ module = {
  37  };
  38
  39  module = {
  40 +  name = applesetos;
  41 +  common = commands/efi/applesetos.c;
  42 +  enable = efi;
  43 +};
  44 +
  45 +module = {
  46    name = blocklist;
  47    common = commands/blocklist.c;
  48  };
  49 diff --git a/grub-core/commands/efi/applesetos.c
  50 b/grub-core/commands/efi/applesetos.c
  51 new file mode 100644
  52 index 0000000..9464307
  53 --- /dev/null
  54 +++ b/grub-core/commands/efi/applesetos.c
  55 @@ -0,0 +1,82 @@
  56 +/* applesetos.c - Pretend to be Mac OS X. */
  57 +/*
  58 + *  GRUB  --  GRand Unified Bootloader
  59 + *  Copyright (C) 2013  Free Software Foundation, Inc.
  60 + *
  61 + *  GRUB is free software: you can redistribute it and/or modify
  62 + *  it under the terms of the GNU General Public License as published by
  63 + *  the Free Software Foundation, either version 3 of the License, or
  64 + *  (at your option) any later version.
  65 + *
  66 + *  GRUB is distributed in the hope that it will be useful,
  67 + *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  68 + *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  69 + *  GNU General Public License for more details.
  70 + *
  71 + *  You should have received a copy of the GNU General Public License
  72 + *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  73 + */
  74 +#include <grub/efi/api.h>
  75 +#include <grub/efi/efi.h>
  76 +#include <grub/command.h>
  77 +/* For NULL.  */
  78 +#include <grub/mm.h>
  79 +
  80 +GRUB_MOD_LICENSE ("GPLv3+");
  81 +
  82 +#define GRUB_EFI_APPLE_SET_OS_PROTOCOL_GUID  \
  83 +  { 0xc5c5da95, 0x7d5c, 0x45e6, \
  84 +    { 0xb2, 0xf1, 0x3f, 0xd5, 0x2b, 0xb1, 0x00, 0x77 } \
  85 +  }
  86 +
  87 +struct grub_efi_apple_set_os_interface
  88 +{
  89 +  grub_efi_uint64_t version;
  90 +  void (*set_os_version) (const grub_efi_char8_t *os_version);
  91 +  void (*set_os_vendor) (const grub_efi_char8_t *os_vendor);
  92 +};
  93 +typedef struct grub_efi_apple_set_os_interface grub_efi_apple_set_os_interface_t;
  94 +
  95 +static const grub_efi_char8_t apple_os_version[] = "macOS-ish";
  96 +static const grub_efi_char8_t apple_os_vendor[]  = "Apple Inc.";
  97 +
  98 +static grub_err_t
  99 +grub_cmd_apple_set_os (grub_command_t cmd __attribute__ ((unused)),
 100 +                       int argc __attribute__ ((unused)),
 101 +                       char **args __attribute__ ((unused)))
 102 +{
 103 +  grub_efi_guid_t apple_set_os_guid = GRUB_EFI_APPLE_SET_OS_PROTOCOL_GUID;
 104 +  grub_efi_apple_set_os_interface_t *set_os;
 105 +  set_os = grub_efi_locate_protocol (&apple_set_os_guid, 0);
 106 +  if (!set_os) {
 107 +    return grub_error (GRUB_ERR_FILE_NOT_FOUND,
 108 +                       "Could not locate the apple set os protocol.");
 109 +  }
 110 +
 111 +  if (set_os->version != 0)
 112 +    {
 113 +      grub_efi_char8_t* os_version = argc > 0 ? args[0] : apple_os_version;
 114 +      grub_efi_char8_t* os_vendor = argc > 1 ? args[1] : apple_os_vendor;
 115 +
 116 +      efi_call_1 (set_os->set_os_version, os_version);
 117 +      grub_printf("Set os version to %s\n", os_version);
 118 +
 119 +      efi_call_1 (set_os->set_os_vendor, os_vendor);
 120 +      grub_printf("Set os vendor to %s\n", os_vendor);
 121 +    }
 122 +
 123 +  return 0;
 124 +}
 125 +
 126 +static grub_command_t cmd;
 127 +
 128 +GRUB_MOD_INIT(applesetos)
 129 +{
 130 +  cmd = grub_register_command ("apple_set_os", grub_cmd_apple_set_os, NULL,
 131 +                               "Register as Apple Inc. Mac OS X 10.9.");
 132 +}
 133 +
 134 +GRUB_MOD_FINI(applesetos)
 135 +{
 136 +  grub_unregister_command (cmd);
 137 +}
 138 --
 139 1.8.5.2
 140