diff options
Diffstat (limited to 'lib/efi_loader/initrddump.c')
| -rw-r--r-- | lib/efi_loader/initrddump.c | 77 |
1 files changed, 68 insertions, 9 deletions
diff --git a/lib/efi_loader/initrddump.c b/lib/efi_loader/initrddump.c index 7de43bcfff4..6f8dd09a79c 100644 --- a/lib/efi_loader/initrddump.c +++ b/lib/efi_loader/initrddump.c @@ -4,6 +4,9 @@ * * initrddump.efi saves the initial RAM disk provided via the * EFI_LOAD_FILE2_PROTOCOL. + * + * Specifying 'nocolor' as load option data suppresses colored output and + * clearing of the screen. */ #include <common.h> @@ -25,6 +28,7 @@ static const efi_guid_t guid_simple_file_system_protocol = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID; static const efi_guid_t load_file2_guid = EFI_LOAD_FILE2_PROTOCOL_GUID; static efi_handle_t handle; +static bool nocolor; /* * Device path defined by Linux to identify the handle providing the @@ -47,6 +51,17 @@ static const struct efi_initrd_dp initrd_dp = { }; /** + * color() - set foreground color + * + * @color: foreground color + */ +static void color(u8 color) +{ + if (!nocolor) + cout->set_attribute(cout, color | EFI_BACKGROUND_BLACK); +} + +/** * print() - print string * * @string: text @@ -57,15 +72,26 @@ static void print(u16 *string) } /** + * cls() - clear screen + */ +static void cls(void) +{ + if (nocolor) + print(u"\r\n"); + else + cout->clear_screen(cout); +} + +/** * error() - print error string * * @string: error text */ static void error(u16 *string) { - cout->set_attribute(cout, EFI_LIGHTRED | EFI_BACKGROUND_BLACK); + color(EFI_LIGHTRED); print(string); - cout->set_attribute(cout, EFI_LIGHTBLUE | EFI_BACKGROUND_BLACK); + color(EFI_LIGHTBLUE); } /* @@ -215,10 +241,13 @@ static u16 *skip_whitespace(u16 *pos) * * @string: string to search for keyword * @keyword: keyword to be searched - * Return: true fi @string starts with the keyword + * Return: true if @string starts with the keyword */ static bool starts_with(u16 *string, u16 *keyword) { + if (!string || !keyword) + return false; + for (; *keyword; ++string, ++keyword) { if (*string != *keyword) return false; @@ -401,6 +430,30 @@ out: } /** + * get_load_options() - get load options + * + * Return: load options or NULL + */ +u16 *get_load_options(void) +{ + efi_status_t ret; + struct efi_loaded_image *loaded_image; + + ret = bs->open_protocol(handle, &loaded_image_guid, + (void **)&loaded_image, NULL, NULL, + EFI_OPEN_PROTOCOL_GET_PROTOCOL); + if (ret != EFI_SUCCESS) { + error(u"Loaded image protocol not found\r\n"); + return NULL; + } + + if (!loaded_image->load_options_size || !loaded_image->load_options) + return NULL; + + return loaded_image->load_options; +} + +/** * efi_main() - entry point of the EFI application. * * @handle: handle of the loaded image @@ -410,18 +463,23 @@ out: efi_status_t EFIAPI efi_main(efi_handle_t image_handle, struct efi_system_table *systab) { + u16 *load_options; + handle = image_handle; systable = systab; cerr = systable->std_err; cout = systable->con_out; cin = systable->con_in; bs = systable->boottime; + load_options = get_load_options(); - cout->set_attribute(cout, EFI_LIGHTBLUE | EFI_BACKGROUND_BLACK); - cout->clear_screen(cout); - cout->set_attribute(cout, EFI_WHITE | EFI_BACKGROUND_BLACK); + if (starts_with(load_options, u"nocolor")) + nocolor = true; + + color(EFI_WHITE); + cls(); print(u"INITRD Dump\r\n===========\r\n\r\n"); - cout->set_attribute(cout, EFI_LIGHTBLUE | EFI_BACKGROUND_BLACK); + color(EFI_LIGHTBLUE); for (;;) { u16 command[BUFFER_SIZE]; @@ -443,7 +501,8 @@ efi_status_t EFIAPI efi_main(efi_handle_t image_handle, do_help(); } - cout->set_attribute(cout, EFI_LIGHTGRAY | EFI_BACKGROUND_BLACK); - cout->clear_screen(cout); + color(EFI_LIGHTGRAY); + cls(); + return EFI_SUCCESS; } |