From b1da143f2a52e021c8809de52c73270dbb65f5d7 Mon Sep 17 00:00:00 2001
From: Jose Carlos Venegas Munoz <jos.c.venegas.munoz@intel.com>
Date: Thu, 16 Jul 2015 15:39:44 -0500
Subject: [PATCH] sd-boot:Show stub cmdline when edit

If Linux efi stub is used, embedded cmdline in efi stub is
not shown. As a result, it is required to rewrite all the
line, if is only required to modify it. This behavior only
happen using Linux efi stub.

This patch allows boot loader to show embedded cmdline when
'e' key is pressed to edit boot loader options.
---
 src/boot/efi/boot.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/boot/efi/boot.c b/src/boot/efi/boot.c
index 827c11844c5..0963cb0995e 100644
--- a/src/boot/efi/boot.c
+++ b/src/boot/efi/boot.c
@@ -1495,6 +1495,7 @@ static VOID config_entry_add_osx(Config *config) {
 static VOID config_entry_add_linux( Config *config, EFI_LOADED_IMAGE *loaded_image, EFI_FILE *root_dir) {
         EFI_FILE_HANDLE linux_dir;
         EFI_STATUS err;
+        ConfigEntry *entry;
 
         err = uefi_call_wrapper(root_dir->Open, 5, root_dir, &linux_dir, L"\\EFI\\Linux", EFI_FILE_MODE_READ, 0ULL);
         if (!EFI_ERROR(err)) {
@@ -1504,6 +1505,7 @@ static VOID config_entry_add_linux( Config *config, EFI_LOADED_IMAGE *loaded_ima
                         EFI_FILE_INFO *f;
                         CHAR8 *sections[] = {
                                 (UINT8 *)".osrel",
+                                (UINT8 *)".cmdline",
                                 NULL
                         };
                         UINTN offs[ELEMENTSOF(sections)-1] = {};
@@ -1535,7 +1537,7 @@ static VOID config_entry_add_linux( Config *config, EFI_LOADED_IMAGE *loaded_ima
                         if (StriCmp(f->FileName + len - 4, L".efi") != 0)
                                 continue;
 
-                        /* look for an .osrel section in the .efi binary */
+                        /* look for .osrel and .cmdline sections in the .efi binary */
                         err = pefile_locate_sections(linux_dir, f->FileName, sections, addrs, offs, szs);
                         if (EFI_ERROR(err))
                                 continue;
@@ -1575,10 +1577,21 @@ static VOID config_entry_add_linux( Config *config, EFI_LOADED_IMAGE *loaded_ima
                         if (os_name && os_id && (os_version || os_build)) {
                                 CHAR16 *conf;
                                 CHAR16 *path;
+                                CHAR16 *cmdline;
 
                                 conf = PoolPrint(L"%s-%s", os_id, os_version ? : os_build);
                                 path = PoolPrint(L"\\EFI\\Linux\\%s", f->FileName);
-                                config_entry_add_loader(config, loaded_image->DeviceHandle, LOADER_LINUX, conf, 'l', os_name, path);
+                                entry = config_entry_add_loader(config, loaded_image->DeviceHandle, LOADER_LINUX, conf, 'l', os_name, path);
+
+                                FreePool(content);
+                                /* read the embedded cmdline file */
+                                len = file_read(linux_dir, f->FileName, offs[1], szs[1] - 1 , &content);
+                                if (len > 0) {
+                                    cmdline = stra_to_str(content);
+                                    entry->options = cmdline;
+                                    cmdline = NULL;
+                                }
+                                FreePool(cmdline);
                                 FreePool(conf);
                                 FreePool(path);
                         }