From 018b8e8ec03e1fb75e1c594b2b6c114176d1bb40 Mon Sep 17 00:00:00 2001 From: Wentao Guan Date: Sun, 25 Aug 2024 17:43:33 +0800 Subject: [PATCH] Ventoy Version loader/efi: Move ARM64 linux loader to common code ARM64 linux loader code is written in such a way that it can be reused across different architectures without much change. Move it to common code so that RISC-V doesn't have to define a separate loader. Signed-off-by: Atish Patra Reviewed-by: Daniel Kiper Signed-off-by: Wentao Guan --- .../grub-2.04/grub-core/loader/efi/linux.c | 859 ++++++++++++++++++ 1 file changed, 859 insertions(+) create mode 100644 GRUB2/MOD_SRC/grub-2.04/grub-core/loader/efi/linux.c diff --git a/GRUB2/MOD_SRC/grub-2.04/grub-core/loader/efi/linux.c b/GRUB2/MOD_SRC/grub-2.04/grub-core/loader/efi/linux.c new file mode 100644 index 00000000..f980f33b --- /dev/null +++ b/GRUB2/MOD_SRC/grub-2.04/grub-core/loader/efi/linux.c @@ -0,0 +1,859 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2013 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +GRUB_MOD_LICENSE ("GPLv3+"); + +static grub_dl_t my_mod; +static int loaded; + +static void *kernel_addr; +static grub_uint64_t kernel_size; + +static char *linux_args; +static grub_uint32_t cmdline_size; + +static grub_addr_t initrd_start; +static grub_addr_t initrd_end; + +#define LINUX_MAX_ARGC 1024 +static int ventoy_debug = 0; +static int ventoy_initrd_called = 0; +static int ventoy_linux_argc = 0; +static char **ventoy_linux_args = NULL; +static int ventoy_extra_initrd_num = 0; +static char *ventoy_extra_initrd_list[256]; +static grub_err_t +grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)), + int argc, char *argv[]); + +grub_err_t +grub_arch_efi_linux_check_image (struct linux_arch_kernel_header * lh) +{ + if (lh->magic != GRUB_LINUX_ARMXX_MAGIC_SIGNATURE) + return grub_error(GRUB_ERR_BAD_OS, "invalid magic number"); + + if ((lh->code0 & 0xffff) != GRUB_PE32_MAGIC) + return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, + N_("plain image kernel not supported - rebuild with CONFIG_(U)EFI_STUB enabled")); + + grub_dprintf ("linux", "UEFI stub kernel:\n"); + grub_dprintf ("linux", "PE/COFF header @ %08x\n", lh->hdr_offset); + + return GRUB_ERR_NONE; +} + +static grub_err_t +finalize_params_linux (void) +{ + int node, retval; + + void *fdt; + + fdt = grub_fdt_load (GRUB_EFI_LINUX_FDT_EXTRA_SPACE); + + if (!fdt) + goto failure; + + node = grub_fdt_find_subnode (fdt, 0, "chosen"); + if (node < 0) + node = grub_fdt_add_subnode (fdt, 0, "chosen"); + + if (node < 1) + goto failure; + + /* Set initrd info */ + if (initrd_start && initrd_end > initrd_start) + { + grub_dprintf ("linux", "Initrd @ %p-%p\n", + (void *) initrd_start, (void *) initrd_end); + + retval = grub_fdt_set_prop64 (fdt, node, "linux,initrd-start", + initrd_start); + if (retval) + goto failure; + retval = grub_fdt_set_prop64 (fdt, node, "linux,initrd-end", + initrd_end); + if (retval) + goto failure; + } + + if (grub_fdt_install() != GRUB_ERR_NONE) + goto failure; + + return GRUB_ERR_NONE; + +failure: + grub_fdt_unload(); + return grub_error(GRUB_ERR_BAD_OS, "failed to install/update FDT"); +} + +grub_err_t +grub_arch_efi_linux_boot_image (grub_addr_t addr, grub_size_t size, char *args) +{ + grub_efi_memory_mapped_device_path_t *mempath; + grub_efi_handle_t image_handle; + grub_efi_boot_services_t *b; + grub_efi_status_t status; + grub_efi_loaded_image_t *loaded_image; + int len; + + mempath = grub_malloc (2 * sizeof (grub_efi_memory_mapped_device_path_t)); + if (!mempath) + return grub_errno; + + mempath[0].header.type = GRUB_EFI_HARDWARE_DEVICE_PATH_TYPE; + mempath[0].header.subtype = GRUB_EFI_MEMORY_MAPPED_DEVICE_PATH_SUBTYPE; + mempath[0].header.length = grub_cpu_to_le16_compile_time (sizeof (*mempath)); + mempath[0].memory_type = GRUB_EFI_LOADER_DATA; + mempath[0].start_address = addr; + mempath[0].end_address = addr + size; + + mempath[1].header.type = GRUB_EFI_END_DEVICE_PATH_TYPE; + mempath[1].header.subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE; + mempath[1].header.length = sizeof (grub_efi_device_path_t); + + b = grub_efi_system_table->boot_services; + status = b->load_image (0, grub_efi_image_handle, + (grub_efi_device_path_t *) mempath, + (void *) addr, size, &image_handle); + if (status != GRUB_EFI_SUCCESS) + return grub_error (GRUB_ERR_BAD_OS, "cannot load image"); + + grub_dprintf ("linux", "linux command line: '%s'\n", args); + + /* Convert command line to UCS-2 */ + loaded_image = grub_efi_get_loaded_image (image_handle); + loaded_image->load_options_size = len = + (grub_strlen (args) + 1) * sizeof (grub_efi_char16_t); + loaded_image->load_options = + grub_efi_allocate_any_pages (GRUB_EFI_BYTES_TO_PAGES (loaded_image->load_options_size)); + if (!loaded_image->load_options) + return grub_errno; + + loaded_image->load_options_size = + 2 * grub_utf8_to_utf16 (loaded_image->load_options, len, + (grub_uint8_t *) args, len, NULL); + + grub_dprintf ("linux", "starting image %p\n", image_handle); + status = b->start_image (image_handle, 0, NULL); + + /* When successful, not reached */ + b->unload_image (image_handle); + grub_efi_free_pages ((grub_addr_t) loaded_image->load_options, + GRUB_EFI_BYTES_TO_PAGES (loaded_image->load_options_size)); + + return grub_errno; +} + + +static void ventoy_debug_pause(void) +{ + char key; + + if (0 == ventoy_debug) + { + return; + } + + grub_printf("press Enter to continue ......\n"); + while (1) + { + key = grub_getkey(); + if (key == '\n' || key == '\r') + { + break; + } + } +} + +static int ventoy_preboot(void) +{ + int i; + const char *file; + char buf[128]; + + if (ventoy_debug) + { + grub_printf("ventoy_preboot %d %d\n", ventoy_linux_argc, ventoy_initrd_called); + ventoy_debug_pause(); + } + + if (ventoy_linux_argc == 0) + { + return 0; + } + + if (ventoy_initrd_called) + { + ventoy_initrd_called = 0; + return 0; + } + + grub_snprintf(buf, sizeof(buf), "mem:%s:size:%s", grub_env_get("ventoy_cpio_addr"), grub_env_get("ventoy_cpio_size")); + + ventoy_extra_initrd_list[ventoy_extra_initrd_num++] = grub_strdup(buf); + + file = grub_env_get("vtoy_img_part_file"); + if (file) + { + ventoy_extra_initrd_list[ventoy_extra_initrd_num++] = grub_strdup(file); + } + + if (ventoy_debug) + { + grub_printf("========== initrd list ==========\n"); + for (i = 0; i < ventoy_extra_initrd_num; i++) + { + grub_printf("%s\n", ventoy_extra_initrd_list[i]); + } + grub_printf("=================================\n"); + + ventoy_debug_pause(); + } + + grub_cmd_initrd(NULL, ventoy_extra_initrd_num, ventoy_extra_initrd_list); + + return 0; +} + +static int ventoy_boot_opt_filter(char *opt) +{ + if (grub_strcmp(opt, "noinitrd") == 0) + { + return 1; + } + + if (grub_strcmp(opt, "vga=current") == 0) + { + return 1; + } + + if (grub_strncmp(opt, "rdinit=", 7) == 0) + { + if (grub_strcmp(opt, "rdinit=/vtoy/vtoy") != 0) + { + opt[0] = 'v'; + opt[1] = 't'; + } + return 0; + } + + if (grub_strncmp(opt, "init=", 5) == 0) + { + opt[0] = 'v'; + opt[1] = 't'; + return 0; + } + + if (grub_strncmp(opt, "dm=", 3) == 0) + { + opt[0] = 'D'; + opt[1] = 'M'; + return 0; + } + + if (ventoy_debug) + { + if (grub_strcmp(opt, "quiet") == 0) + { + return 1; + } + + if (grub_strncmp(opt, "loglevel=", 9) == 0) + { + return 1; + } + + if (grub_strcmp(opt, "splash") == 0) + { + return 1; + } + } + + return 0; +} + +static int ventoy_bootopt_hook(int argc, char *argv[]) +{ + int i; + int TmpIdx; + int count = 0; + const char *env; + char c; + char *newenv; + char *last, *pos; + + //grub_printf("ventoy_bootopt_hook: %d %d\n", argc, ventoy_linux_argc); + + if (ventoy_linux_argc == 0) + { + return 0; + } + + /* To avoid --- parameter, we split two parts */ + for (TmpIdx = 0; TmpIdx < argc; TmpIdx++) + { + if (ventoy_boot_opt_filter(argv[TmpIdx])) + { + continue; + } + + if (grub_strncmp(argv[TmpIdx], "--", 2) == 0) + { + break; + } + + ventoy_linux_args[count++] = grub_strdup(argv[TmpIdx]); + } + + for (i = 0; i < ventoy_linux_argc; i++) + { + ventoy_linux_args[count] = ventoy_linux_args[i + (LINUX_MAX_ARGC / 2)]; + ventoy_linux_args[i + (LINUX_MAX_ARGC / 2)] = NULL; + + if (ventoy_linux_args[count][0] == '@') + { + env = grub_env_get(ventoy_linux_args[count] + 1); + if (env) + { + grub_free(ventoy_linux_args[count]); + + newenv = grub_strdup(env); + last = newenv; + + while (*last) + { + while (*last) + { + if (*last != ' ' && *last != '\t') + { + break; + } + last++; + } + + if (*last == 0) + { + break; + } + + for (pos = last; *pos; pos++) + { + if (*pos == ' ' || *pos == '\t') + { + c = *pos; + *pos = 0; + if (0 == ventoy_boot_opt_filter(last)) + { + ventoy_linux_args[count++] = grub_strdup(last); + } + *pos = c; + break; + } + } + + if (*pos == 0) + { + if (0 == ventoy_boot_opt_filter(last)) + { + ventoy_linux_args[count++] = grub_strdup(last); + } + break; + } + + last = pos + 1; + } + } + else + { + count++; + } + } + else + { + count++; + } + } + + while (TmpIdx < argc) + { + if (ventoy_boot_opt_filter(argv[TmpIdx])) + { + continue; + } + + ventoy_linux_args[count++] = grub_strdup(argv[TmpIdx]); + TmpIdx++; + } + + if (ventoy_debug) + { + ventoy_linux_args[count++] = grub_strdup("loglevel=7"); + } + + ventoy_linux_argc = count; + + if (ventoy_debug) + { + grub_printf("========== bootoption ==========\n"); + for (i = 0; i < count; i++) + { + grub_printf("%s ", ventoy_linux_args[i]); + } + grub_printf("\n================================\n"); + } + + return 0; +} + +static grub_err_t +grub_cmd_set_boot_opt (grub_command_t cmd __attribute__ ((unused)), + int argc, char *argv[]) +{ + int i; + const char *vtdebug; + + for (i = 0; i < argc; i++) + { + ventoy_linux_args[ventoy_linux_argc + (LINUX_MAX_ARGC / 2) ] = grub_strdup(argv[i]); + ventoy_linux_argc++; + } + + vtdebug = grub_env_get("vtdebug_flag"); + if (vtdebug && vtdebug[0]) + { + ventoy_debug = 1; + } + + if (ventoy_debug) grub_printf("ventoy set boot opt %d\n", ventoy_linux_argc); + + return 0; +} + +static grub_err_t +grub_cmd_unset_boot_opt (grub_command_t cmd __attribute__ ((unused)), + int argc, char *argv[]) +{ + int i; + + (void)argc; + (void)argv; + + for (i = 0; i < LINUX_MAX_ARGC; i++) + { + if (ventoy_linux_args[i]) + { + grub_free(ventoy_linux_args[i]); + } + } + + ventoy_debug = 0; + ventoy_linux_argc = 0; + ventoy_initrd_called = 0; + grub_memset(ventoy_linux_args, 0, sizeof(char *) * LINUX_MAX_ARGC); + return 0; +} + +static grub_err_t +grub_cmd_extra_initrd_append (grub_command_t cmd __attribute__ ((unused)), + int argc, char *argv[]) +{ + int newclen = 0; + char *pos = NULL; + char *end = NULL; + char buf[256] = {0}; + + if (argc != 1) + { + return 1; + } + + for (pos = argv[0]; *pos; pos++) + { + if (*pos == '/') + { + end = pos; + } + } + + if (end) + { + /* grub2 newc bug workaround */ + newclen = (int)grub_strlen(end + 1); + if ((110 + newclen) % 4 == 0) + { + grub_snprintf(buf, sizeof(buf), "newc:.%s:%s", end + 1, argv[0]); + } + else + { + grub_snprintf(buf, sizeof(buf), "newc:%s:%s", end + 1, argv[0]); + } + + if (ventoy_extra_initrd_num < 256) + { + ventoy_extra_initrd_list[ventoy_extra_initrd_num++] = grub_strdup(buf); + } + } + + return 0; +} + +static grub_err_t +grub_cmd_extra_initrd_reset (grub_command_t cmd __attribute__ ((unused)), + int argc, char *argv[]) +{ + int i; + + (void)argc; + (void)argv; + + for (i = 0; i < ventoy_extra_initrd_num; i++) + { + if (ventoy_extra_initrd_list[i]) + { + grub_free(ventoy_extra_initrd_list[i]); + } + } + + grub_memset(ventoy_extra_initrd_list, 0, sizeof(ventoy_extra_initrd_list)); + + return 0; +} + + +static grub_err_t +grub_linux_boot (void) +{ + ventoy_preboot(); + + if (finalize_params_linux () != GRUB_ERR_NONE) + return grub_errno; + + return (grub_arch_efi_linux_boot_image((grub_addr_t)kernel_addr, + kernel_size, linux_args)); +} + +static grub_err_t +grub_linux_unload (void) +{ + grub_dl_unref (my_mod); + loaded = 0; + if (initrd_start) + grub_efi_free_pages ((grub_efi_physical_address_t) initrd_start, + GRUB_EFI_BYTES_TO_PAGES (initrd_end - initrd_start)); + initrd_start = initrd_end = 0; + grub_free (linux_args); + if (kernel_addr) + grub_efi_free_pages ((grub_addr_t) kernel_addr, + GRUB_EFI_BYTES_TO_PAGES (kernel_size)); + grub_fdt_unload (); + return GRUB_ERR_NONE; +} + +/* + * As per linux/Documentation/arm/Booting + * ARM initrd needs to be covered by kernel linear mapping, + * so place it in the first 512MB of DRAM. + * + * As per linux/Documentation/arm64/booting.txt + * ARM64 initrd needs to be contained entirely within a 1GB aligned window + * of up to 32GB of size that covers the kernel image as well. + * Since the EFI stub loader will attempt to load the kernel near start of + * RAM, place the buffer in the first 32GB of RAM. + */ +#ifdef __arm__ +#define INITRD_MAX_ADDRESS_OFFSET (512U * 1024 * 1024) +#else /* __aarch64__ */ +#define INITRD_MAX_ADDRESS_OFFSET (32ULL * 1024 * 1024 * 1024) +#endif + +/* + * This function returns a pointer to a legally allocated initrd buffer, + * or NULL if unsuccessful + */ +static void * +allocate_initrd_mem (int initrd_pages) +{ + grub_addr_t max_addr; + + if (grub_efi_get_ram_base (&max_addr) != GRUB_ERR_NONE) + return NULL; + + max_addr += INITRD_MAX_ADDRESS_OFFSET - 1; + + return grub_efi_allocate_pages_real (max_addr, initrd_pages, + GRUB_EFI_ALLOCATE_MAX_ADDRESS, + GRUB_EFI_LOADER_DATA); +} + +static grub_err_t +grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)), + int argc, char *argv[]) +{ + struct grub_linux_initrd_context initrd_ctx = { 0, 0, 0 }; + int initrd_size, initrd_pages; + void *initrd_mem = NULL; + + if (argc == 0) + { + grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected")); + goto fail; + } + + if (!loaded) + { + grub_error (GRUB_ERR_BAD_ARGUMENT, + N_("you need to load the kernel first")); + goto fail; + } + + if (grub_initrd_init (argc, argv, &initrd_ctx)) + goto fail; + + initrd_size = grub_get_initrd_size (&initrd_ctx); + grub_dprintf ("linux", "Loading initrd\n"); + + initrd_pages = (GRUB_EFI_BYTES_TO_PAGES (initrd_size)); + initrd_mem = allocate_initrd_mem (initrd_pages); + + if (!initrd_mem) + { + grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory")); + goto fail; + } + + if (grub_initrd_load (&initrd_ctx, initrd_mem)) + goto fail; + + initrd_start = (grub_addr_t) initrd_mem; + initrd_end = initrd_start + initrd_size; + grub_dprintf ("linux", "[addr=%p, size=0x%x]\n", + (void *) initrd_start, initrd_size); + + fail: + grub_initrd_close (&initrd_ctx); + if (initrd_mem && !initrd_start) + grub_efi_free_pages ((grub_addr_t) initrd_mem, initrd_pages); + + return grub_errno; +} + +static grub_err_t +grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)), + int argc, char *argv[]) +{ + grub_file_t file = 0; + struct linux_arch_kernel_header lh; + grub_err_t err; + + grub_dl_ref (my_mod); + + if (argc == 0) + { + grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected")); + goto fail; + } + + file = grub_file_open (argv[0], GRUB_FILE_TYPE_LINUX_KERNEL); + if (!file) + goto fail; + + kernel_size = grub_file_size (file); + + if (grub_file_read (file, &lh, sizeof (lh)) < (long) sizeof (lh)) + return grub_errno; + + if (grub_arch_efi_linux_check_image (&lh) != GRUB_ERR_NONE) + goto fail; + + grub_loader_unset(); + + grub_dprintf ("linux", "kernel file size: %lld\n", (long long) kernel_size); + kernel_addr = grub_efi_allocate_any_pages (GRUB_EFI_BYTES_TO_PAGES (kernel_size)); + grub_dprintf ("linux", "kernel numpages: %lld\n", + (long long) GRUB_EFI_BYTES_TO_PAGES (kernel_size)); + if (!kernel_addr) + { + grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory")); + goto fail; + } + + grub_file_seek (file, 0); + if (grub_file_read (file, kernel_addr, kernel_size) + < (grub_int64_t) kernel_size) + { + if (!grub_errno) + grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"), argv[0]); + goto fail; + } + + grub_dprintf ("linux", "kernel @ %p\n", kernel_addr); + + cmdline_size = grub_loader_cmdline_size (argc, argv) + sizeof (LINUX_IMAGE); + linux_args = grub_malloc (cmdline_size); + if (!linux_args) + { + grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory")); + goto fail; + } + grub_memcpy (linux_args, LINUX_IMAGE, sizeof (LINUX_IMAGE)); + + if (ventoy_linux_argc) + { + ventoy_bootopt_hook(argc, argv); + err = grub_create_loader_cmdline (ventoy_linux_argc, ventoy_linux_args, + linux_args + sizeof (LINUX_IMAGE) - 1, + cmdline_size, + GRUB_VERIFY_KERNEL_CMDLINE); } + else + { + err = grub_create_loader_cmdline (argc, argv, + linux_args + sizeof (LINUX_IMAGE) - 1, + cmdline_size, + GRUB_VERIFY_KERNEL_CMDLINE); + } + + if (err) + goto fail; + + if (grub_errno == GRUB_ERR_NONE) + { + grub_loader_set (grub_linux_boot, grub_linux_unload, 0); + loaded = 1; + } + +fail: + if (file) + grub_file_close (file); + + if (grub_errno != GRUB_ERR_NONE) + { + grub_dl_unref (my_mod); + loaded = 0; + } + + if (linux_args && !loaded) + grub_free (linux_args); + + if (kernel_addr && !loaded) + grub_efi_free_pages ((grub_addr_t) kernel_addr, + GRUB_EFI_BYTES_TO_PAGES (kernel_size)); + + return grub_errno; +} + +static grub_err_t +ventoy_cmd_initrd (grub_command_t cmd __attribute__ ((unused)), + int argc, char *argv[]) +{ + int i; + const char *file; + char buf[64]; + + if (ventoy_debug) grub_printf("ventoy_cmd_initrd %d\n", ventoy_linux_argc); + + if (ventoy_linux_argc == 0) + { + return grub_cmd_initrd(cmd, argc, argv); + } + + grub_snprintf(buf, sizeof(buf), "mem:%s:size:%s", grub_env_get("ventoy_cpio_addr"), grub_env_get("ventoy_cpio_size")); + + if (ventoy_debug) grub_printf("membuf=%s\n", buf); + + ventoy_extra_initrd_list[ventoy_extra_initrd_num++] = grub_strdup(buf); + + file = grub_env_get("vtoy_img_part_file"); + if (file) + { + ventoy_extra_initrd_list[ventoy_extra_initrd_num++] = grub_strdup(file); + } + + for (i = 0; i < argc; i++) + { + ventoy_extra_initrd_list[ventoy_extra_initrd_num++] = grub_strdup(argv[i]); + } + + ventoy_initrd_called = 1; + + if (ventoy_debug) + { + grub_printf("========== initrd list ==========\n"); + for (i = 0; i < ventoy_extra_initrd_num; i++) + { + grub_printf("%s\n", ventoy_extra_initrd_list[i]); + } + grub_printf("=================================\n"); + } + + return grub_cmd_initrd(cmd, ventoy_extra_initrd_num, ventoy_extra_initrd_list); +} + + +static grub_command_t cmd_linux, cmd_initrd, cmd_linuxefi, cmd_initrdefi; +static grub_command_t cmd_set_bootopt, cmd_unset_bootopt, cmd_extra_initrd_append, cmd_extra_initrd_reset; + + +GRUB_MOD_INIT (linux) +{ + cmd_linux = grub_register_command ("linux", grub_cmd_linux, 0, + N_("Load Linux.")); + cmd_initrd = grub_register_command ("initrd", ventoy_cmd_initrd, 0, + N_("Load initrd.")); + + cmd_linuxefi = grub_register_command ("linuxefi", grub_cmd_linux, + 0, N_("Load Linux.")); + cmd_initrdefi = grub_register_command ("initrdefi", ventoy_cmd_initrd, + 0, N_("Load initrd.")); + + cmd_set_bootopt = grub_register_command ("vt_set_boot_opt", grub_cmd_set_boot_opt, 0, N_("set ext boot opt")); + cmd_unset_bootopt = grub_register_command ("vt_unset_boot_opt", grub_cmd_unset_boot_opt, 0, N_("unset ext boot opt")); + + cmd_extra_initrd_append = grub_register_command ("vt_img_extra_initrd_append", grub_cmd_extra_initrd_append, 0, N_("")); + cmd_extra_initrd_reset = grub_register_command ("vt_img_extra_initrd_reset", grub_cmd_extra_initrd_reset, 0, N_("")); + + ventoy_linux_args = grub_zalloc(sizeof(char *) * LINUX_MAX_ARGC); + + my_mod = mod; +} + +GRUB_MOD_FINI (linux) +{ + grub_unregister_command (cmd_linux); + grub_unregister_command (cmd_initrd); +}