diff options
Diffstat (limited to 'arch/x86/boot')
| -rw-r--r-- | arch/x86/boot/Makefile | 2 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/Makefile | 5 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/eboot.c | 889 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/eboot.h | 31 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/efi_thunk_64.S | 29 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/head_32.S | 48 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/head_64.S | 125 | ||||
| -rw-r--r-- | arch/x86/boot/header.S | 87 | ||||
| -rw-r--r-- | arch/x86/boot/tools/build.c | 86 |
9 files changed, 261 insertions, 1041 deletions
diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile index 012b82fc8617..ef9e1f2c836c 100644 --- a/arch/x86/boot/Makefile +++ b/arch/x86/boot/Makefile @@ -88,7 +88,7 @@ $(obj)/vmlinux.bin: $(obj)/compressed/vmlinux FORCE SETUP_OBJS = $(addprefix $(obj)/,$(setup-y)) -sed-zoffset := -e 's/^\([0-9a-fA-F]*\) [a-zA-Z] \(startup_32\|startup_64\|efi32_stub_entry\|efi64_stub_entry\|efi_pe_entry\|input_data\|kernel_info\|_end\|_ehead\|_text\|z_.*\)$$/\#define ZO_\2 0x\1/p' +sed-zoffset := -e 's/^\([0-9a-fA-F]*\) [a-zA-Z] \(startup_32\|startup_64\|efi32_stub_entry\|efi64_stub_entry\|efi_pe_entry\|efi32_pe_entry\|input_data\|kernel_info\|_end\|_ehead\|_text\|z_.*\)$$/\#define ZO_\2 0x\1/p' quiet_cmd_zoffset = ZOFFSET $@ cmd_zoffset = $(NM) $< | sed -n $(sed-zoffset) > $@ diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile index 26050ae0b27e..e51879bdc51c 100644 --- a/arch/x86/boot/compressed/Makefile +++ b/arch/x86/boot/compressed/Makefile @@ -87,10 +87,7 @@ endif vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o -$(obj)/eboot.o: KBUILD_CFLAGS += -fshort-wchar -mno-red-zone - -vmlinux-objs-$(CONFIG_EFI_STUB) += $(obj)/eboot.o \ - $(objtree)/drivers/firmware/efi/libstub/lib.a +vmlinux-objs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_thunk_$(BITS).o # The compressed kernel is built with -fPIC/-fPIE so that a boot loader diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c deleted file mode 100644 index 287393d725f0..000000000000 --- a/arch/x86/boot/compressed/eboot.c +++ /dev/null @@ -1,889 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only - -/* ----------------------------------------------------------------------- - * - * Copyright 2011 Intel Corporation; author Matt Fleming - * - * ----------------------------------------------------------------------- */ - -#pragma GCC visibility push(hidden) - -#include <linux/efi.h> -#include <linux/pci.h> - -#include <asm/efi.h> -#include <asm/e820/types.h> -#include <asm/setup.h> -#include <asm/desc.h> -#include <asm/boot.h> - -#include "../string.h" -#include "eboot.h" - -static efi_system_table_t *sys_table; -extern const bool efi_is64; - -__pure efi_system_table_t *efi_system_table(void) -{ - return sys_table; -} - -__attribute_const__ bool efi_is_64bit(void) -{ - if (IS_ENABLED(CONFIG_EFI_MIXED)) - return efi_is64; - return IS_ENABLED(CONFIG_X86_64); -} - -static efi_status_t -preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom) -{ - struct pci_setup_rom *rom = NULL; - efi_status_t status; - unsigned long size; - uint64_t romsize; - void *romimage; - - /* - * Some firmware images contain EFI function pointers at the place where - * the romimage and romsize fields are supposed to be. Typically the EFI - * code is mapped at high addresses, translating to an unrealistically - * large romsize. The UEFI spec limits the size of option ROMs to 16 - * MiB so we reject any ROMs over 16 MiB in size to catch this. - */ - romimage = efi_table_attr(pci, romimage); - romsize = efi_table_attr(pci, romsize); - if (!romimage || !romsize || romsize > SZ_16M) - return EFI_INVALID_PARAMETER; - - size = romsize + sizeof(*rom); - - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, - (void **)&rom); - if (status != EFI_SUCCESS) { - efi_printk("Failed to allocate memory for 'rom'\n"); - return status; - } - - memset(rom, 0, sizeof(*rom)); - - rom->data.type = SETUP_PCI; - rom->data.len = size - sizeof(struct setup_data); - rom->data.next = 0; - rom->pcilen = pci->romsize; - *__rom = rom; - - status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16, - PCI_VENDOR_ID, 1, &rom->vendor); - - if (status != EFI_SUCCESS) { - efi_printk("Failed to read rom->vendor\n"); - goto free_struct; - } - - status = efi_call_proto(pci, pci.read, EfiPciIoWidthUint16, - PCI_DEVICE_ID, 1, &rom->devid); - - if (status != EFI_SUCCESS) { - efi_printk("Failed to read rom->devid\n"); - goto free_struct; - } - - status = efi_call_proto(pci, get_location, &rom->segment, &rom->bus, - &rom->device, &rom->function); - - if (status != EFI_SUCCESS) - goto free_struct; - - memcpy(rom->romdata, romimage, romsize); - return status; - -free_struct: - efi_bs_call(free_pool, rom); - return status; -} - -/* - * There's no way to return an informative status from this function, - * because any analysis (and printing of error messages) needs to be - * done directly at the EFI function call-site. - * - * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we - * just didn't find any PCI devices, but there's no way to tell outside - * the context of the call. - */ -static void setup_efi_pci(struct boot_params *params) -{ - efi_status_t status; - void **pci_handle = NULL; - efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID; - unsigned long size = 0; - struct setup_data *data; - efi_handle_t h; - int i; - - status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, - &pci_proto, NULL, &size, pci_handle); - - if (status == EFI_BUFFER_TOO_SMALL) { - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, - (void **)&pci_handle); - - if (status != EFI_SUCCESS) { - efi_printk("Failed to allocate memory for 'pci_handle'\n"); - return; - } - - status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, - &pci_proto, NULL, &size, pci_handle); - } - - if (status != EFI_SUCCESS) - goto free_handle; - - data = (struct setup_data *)(unsigned long)params->hdr.setup_data; - - while (data && data->next) - data = (struct setup_data *)(unsigned long)data->next; - - for_each_efi_handle(h, pci_handle, size, i) { - efi_pci_io_protocol_t *pci = NULL; - struct pci_setup_rom *rom; - - status = efi_bs_call(handle_protocol, h, &pci_proto, - (void **)&pci); - if (status != EFI_SUCCESS || !pci) - continue; - - status = preserve_pci_rom_image(pci, &rom); - if (status != EFI_SUCCESS) - continue; - - if (data) - data->next = (unsigned long)rom; - else - params->hdr.setup_data = (unsigned long)rom; - - data = (struct setup_data *)rom; - } - -free_handle: - efi_bs_call(free_pool, pci_handle); -} - -static void retrieve_apple_device_properties(struct boot_params *boot_params) -{ - efi_guid_t guid = APPLE_PROPERTIES_PROTOCOL_GUID; - struct setup_data *data, *new; - efi_status_t status; - u32 size = 0; - apple_properties_protocol_t *p; - - status = efi_bs_call(locate_protocol, &guid, NULL, (void **)&p); - if (status != EFI_SUCCESS) - return; - - if (efi_table_attr(p, version) != 0x10000) { - efi_printk("Unsupported properties proto version\n"); - return; - } - - efi_call_proto(p, get_all, NULL, &size); - if (!size) - return; - - do { - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, - size + sizeof(struct setup_data), - (void **)&new); - if (status != EFI_SUCCESS) { - efi_printk("Failed to allocate memory for 'properties'\n"); - return; - } - - status = efi_call_proto(p, get_all, new->data, &size); - - if (status == EFI_BUFFER_TOO_SMALL) - efi_bs_call(free_pool, new); - } while (status == EFI_BUFFER_TOO_SMALL); - - new->type = SETUP_APPLE_PROPERTIES; - new->len = size; - new->next = 0; - - data = (struct setup_data *)(unsigned long)boot_params->hdr.setup_data; - if (!data) { - boot_params->hdr.setup_data = (unsigned long)new; - } else { - while (data->next) - data = (struct setup_data *)(unsigned long)data->next; - data->next = (unsigned long)new; - } -} - -static const efi_char16_t apple[] = L"Apple"; - -static void setup_quirks(struct boot_params *boot_params) -{ - efi_char16_t *fw_vendor = (efi_char16_t *)(unsigned long) - efi_table_attr(efi_system_table(), fw_vendor); - - if (!memcmp(fw_vendor, apple, sizeof(apple))) { - if (IS_ENABLED(CONFIG_APPLE_PROPERTIES)) - retrieve_apple_device_properties(boot_params); - } -} - -/* - * See if we have Universal Graphics Adapter (UGA) protocol - */ -static efi_status_t -setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size) -{ - efi_status_t status; - u32 width, height; - void **uga_handle = NULL; - efi_uga_draw_protocol_t *uga = NULL, *first_uga; - efi_handle_t handle; - int i; - - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, - (void **)&uga_handle); - if (status != EFI_SUCCESS) - return status; - - status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, - uga_proto, NULL, &size, uga_handle); - if (status != EFI_SUCCESS) - goto free_handle; - - height = 0; - width = 0; - - first_uga = NULL; - for_each_efi_handle(handle, uga_handle, size, i) { - efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID; - u32 w, h, depth, refresh; - void *pciio; - - status = efi_bs_call(handle_protocol, handle, uga_proto, - (void **)&uga); - if (status != EFI_SUCCESS) - continue; - - pciio = NULL; - efi_bs_call(handle_protocol, handle, &pciio_proto, &pciio); - - status = efi_call_proto(uga, get_mode, &w, &h, &depth, &refresh); - if (status == EFI_SUCCESS && (!first_uga || pciio)) { - width = w; - height = h; - - /* - * Once we've found a UGA supporting PCIIO, - * don't bother looking any further. - */ - if (pciio) - break; - - first_uga = uga; - } - } - - if (!width && !height) - goto free_handle; - - /* EFI framebuffer */ - si->orig_video_isVGA = VIDEO_TYPE_EFI; - - si->lfb_depth = 32; - si->lfb_width = width; - si->lfb_height = height; - - si->red_size = 8; - si->red_pos = 16; - si->green_size = 8; - si->green_pos = 8; - si->blue_size = 8; - si->blue_pos = 0; - si->rsvd_size = 8; - si->rsvd_pos = 24; - -free_handle: - efi_bs_call(free_pool, uga_handle); - - return status; -} - -void setup_graphics(struct boot_params *boot_params) -{ - efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID; - struct screen_info *si; - efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID; - efi_status_t status; - unsigned long size; - void **gop_handle = NULL; - void **uga_handle = NULL; - - si = &boot_params->screen_info; - memset(si, 0, sizeof(*si)); - - size = 0; - status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, - &graphics_proto, NULL, &size, gop_handle); - if (status == EFI_BUFFER_TOO_SMALL) - status = efi_setup_gop(si, &graphics_proto, size); - - if (status != EFI_SUCCESS) { - size = 0; - status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, - &uga_proto, NULL, &size, uga_handle); - if (status == EFI_BUFFER_TOO_SMALL) - setup_uga(si, &uga_proto, size); - } -} - -void startup_32(struct boot_params *boot_params); - -void __noreturn efi_stub_entry(efi_handle_t handle, - efi_system_table_t *sys_table_arg, - struct boot_params *boot_params); - -/* - * Because the x86 boot code expects to be passed a boot_params we - * need to create one ourselves (usually the bootloader would create - * one for us). - */ -efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, - efi_system_table_t *sys_table_arg) -{ - struct boot_params *boot_params; - struct apm_bios_info *bi; - struct setup_header *hdr; - efi_loaded_image_t *image; - efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID; - int options_size = 0; - efi_status_t status; - char *cmdline_ptr; - unsigned long ramdisk_addr; - unsigned long ramdisk_size; - - sys_table = sys_table_arg; - - /* Check if we were booted by the EFI firmware */ - if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) - return EFI_INVALID_PARAMETER; - - status = efi_bs_call(handle_protocol, handle, &proto, (void *)&image); - if (status != EFI_SUCCESS) { - efi_printk("Failed to get handle for LOADED_IMAGE_PROTOCOL\n"); - return status; - } - - status = efi_low_alloc(0x4000, 1, (unsigned long *)&boot_params); - if (status != EFI_SUCCESS) { - efi_printk("Failed to allocate lowmem for boot params\n"); - return status; - } - - memset(boot_params, 0x0, 0x4000); - - hdr = &boot_params->hdr; - bi = &boot_params->apm_bios_info; - - /* Copy the second sector to boot_params */ - memcpy(&hdr->jump, image->image_base + 512, 512); - - /* - * Fill out some of the header fields ourselves because the - * EFI firmware loader doesn't load the first sector. - */ - hdr->root_flags = 1; - hdr->vid_mode = 0xffff; - hdr->boot_flag = 0xAA55; - - hdr->type_of_loader = 0x21; - - /* Convert unicode cmdline to ascii */ - cmdline_ptr = efi_convert_cmdline(image, &options_size); - if (!cmdline_ptr) - goto fail; - - hdr->cmd_line_ptr = (unsigned long)cmdline_ptr; - /* Fill in upper bits of command line address, NOP on 32 bit */ - boot_params->ext_cmd_line_ptr = (u64)(unsigned long)cmdline_ptr >> 32; - - hdr->ramdisk_image = 0; - hdr->ramdisk_size = 0; - - /* Clear APM BIOS info */ - memset(bi, 0, sizeof(*bi)); - - status = efi_parse_options(cmdline_ptr); - if (status != EFI_SUCCESS) - goto fail2; - - status = handle_cmdline_files(image, - (char *)(unsigned long)hdr->cmd_line_ptr, - "initrd=", hdr->initrd_addr_max, - &ramdisk_addr, &ramdisk_size); - - if (status != EFI_SUCCESS && - hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G) { - efi_printk("Trying to load files to higher address\n"); - status = handle_cmdline_files(image, - (char *)(unsigned long)hdr->cmd_line_ptr, - "initrd=", -1UL, - &ramdisk_addr, &ramdisk_size); - } - - if (status != EFI_SUCCESS) - goto fail2; - hdr->ramdisk_image = ramdisk_addr & 0xffffffff; - hdr->ramdisk_size = ramdisk_size & 0xffffffff; - boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32; - boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32; - - hdr->code32_start = (u32)(unsigned long)startup_32; - - efi_stub_entry(handle, sys_table, boot_params); - /* not reached */ - -fail2: - efi_free(options_size, hdr->cmd_line_ptr); -fail: - efi_free(0x4000, (unsigned long)boot_params); - - return status; -} - -static void add_e820ext(struct boot_params *params, - struct setup_data *e820ext, u32 nr_entries) -{ - struct setup_data *data; - - e820ext->type = SETUP_E820_EXT; - e820ext->len = nr_entries * sizeof(struct boot_e820_entry); - e820ext->next = 0; - - data = (struct setup_data *)(unsigned long)params->hdr.setup_data; - - while (data && data->next) - data = (struct setup_data *)(unsigned long)data->next; - - if (data) - data->next = (unsigned long)e820ext; - else - params->hdr.setup_data = (unsigned long)e820ext; -} - -static efi_status_t -setup_e820(struct boot_params *params, struct setup_data *e820ext, u32 e820ext_size) -{ - struct boot_e820_entry *entry = params->e820_table; - struct efi_info *efi = ¶ms->efi_info; - struct boot_e820_entry *prev = NULL; - u32 nr_entries; - u32 nr_desc; - int i; - - nr_entries = 0; - nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size; - - for (i = 0; i < nr_desc; i++) { - efi_memory_desc_t *d; - unsigned int e820_type = 0; - unsigned long m = efi->efi_memmap; - -#ifdef CONFIG_X86_64 - m |= (u64)efi->efi_memmap_hi << 32; -#endif - - d = efi_early_memdesc_ptr(m, efi->efi_memdesc_size, i); - switch (d->type) { - case EFI_RESERVED_TYPE: - case EFI_RUNTIME_SERVICES_CODE: - case EFI_RUNTIME_SERVICES_DATA: - case EFI_MEMORY_MAPPED_IO: - case EFI_MEMORY_MAPPED_IO_PORT_SPACE: - case EFI_PAL_CODE: - e820_type = E820_TYPE_RESERVED; - break; - - case EFI_UNUSABLE_MEMORY: - e820_type = E820_TYPE_UNUSABLE; - break; - - case EFI_ACPI_RECLAIM_MEMORY: - e820_type = E820_TYPE_ACPI; - break; - - case EFI_LOADER_CODE: - case EFI_LOADER_DATA: - case EFI_BOOT_SERVICES_CODE: - case EFI_BOOT_SERVICES_DATA: - case EFI_CONVENTIONAL_MEMORY: - if (efi_soft_reserve_enabled() && - (d->attribute & EFI_MEMORY_SP)) - e820_type = E820_TYPE_SOFT_RESERVED; - else - e820_type = E820_TYPE_RAM; - break; - - case EFI_ACPI_MEMORY_NVS: - e820_type = E820_TYPE_NVS; - break; - - case EFI_PERSISTENT_MEMORY: - e820_type = E820_TYPE_PMEM; - break; - - default: - continue; - } - - /* Merge adjacent mappings */ - if (prev && prev->type == e820_type && - (prev->addr + prev->size) == d->phys_addr) { - prev->size += d->num_pages << 12; - continue; - } - - if (nr_entries == ARRAY_SIZE(params->e820_table)) { - u32 need = (nr_desc - i) * sizeof(struct e820_entry) + - sizeof(struct setup_data); - - if (!e820ext || e820ext_size < need) - return EFI_BUFFER_TOO_SMALL; - - /* boot_params map full, switch to e820 extended */ - entry = (struct boot_e820_entry *)e820ext->data; - } - - entry->addr = d->phys_addr; - entry->size = d->num_pages << PAGE_SHIFT; - entry->type = e820_type; - prev = entry++; - nr_entries++; - } - - if (nr_entries > ARRAY_SIZE(params->e820_table)) { - u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_table); - - add_e820ext(params, e820ext, nr_e820ext); - nr_entries -= nr_e820ext; - } - - params->e820_entries = (u8)nr_entries; - - return EFI_SUCCESS; -} - -static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext, - u32 *e820ext_size) -{ - efi_status_t status; - unsigned long size; - - size = sizeof(struct setup_data) + - sizeof(struct e820_entry) * nr_desc; - - if (*e820ext) { - efi_bs_call(free_pool, *e820ext); - *e820ext = NULL; - *e820ext_size = 0; - } - - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, - (void **)e820ext); - if (status == EFI_SUCCESS) - *e820ext_size = size; - - return status; -} - -static efi_status_t allocate_e820(struct boot_params *params, - struct setup_data **e820ext, - u32 *e820ext_size) -{ - unsigned long map_size, desc_size, buff_size; - struct efi_boot_memmap boot_map; - efi_memory_desc_t *map; - efi_status_t status; - __u32 nr_desc; - - boot_map.map = ↦ - boot_map.map_size = &map_size; - boot_map.desc_size = &desc_size; - boot_map.desc_ver = NULL; - boot_map.key_ptr = NULL; - boot_map.buff_size = &buff_size; - - status = efi_get_memory_map(&boot_map); - if (status != EFI_SUCCESS) - return status; - - nr_desc = buff_size / desc_size; - - if (nr_desc > ARRAY_SIZE(params->e820_table)) { - u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table); - - status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size); - if (status != EFI_SUCCESS) - return status; - } - - return EFI_SUCCESS; -} - -struct exit_boot_struct { - struct boot_params *boot_params; - struct efi_info *efi; -}; - -static efi_status_t exit_boot_func(struct efi_boot_memmap *map, - void *priv) -{ - const char *signature; - struct exit_boot_struct *p = priv; - - signature = efi_is_64bit() ? EFI64_LOADER_SIGNATURE - : EFI32_LOADER_SIGNATURE; - memcpy(&p->efi->efi_loader_signature, signature, sizeof(__u32)); - - p->efi->efi_systab = (unsigned long)efi_system_table(); - p->efi->efi_memdesc_size = *map->desc_size; - p->efi->efi_memdesc_version = *map->desc_ver; - p->efi->efi_memmap = (unsigned long)*map->map; - p->efi->efi_memmap_size = *map->map_size; - -#ifdef CONFIG_X86_64 - p->efi->efi_systab_hi = (unsigned long)efi_system_table() >> 32; - p->efi->efi_memmap_hi = (unsigned long)*map->map >> 32; -#endif - - return EFI_SUCCESS; -} - -static efi_status_t exit_boot(struct boot_params *boot_params, void *handle) -{ - unsigned long map_sz, key, desc_size, buff_size; - efi_memory_desc_t *mem_map; - struct setup_data *e820ext = NULL; - __u32 e820ext_size = 0; - efi_status_t status; - __u32 desc_version; - struct efi_boot_memmap map; - struct exit_boot_struct priv; - - map.map = &mem_map; - map.map_size = &map_sz; - map.desc_size = &desc_size; - map.desc_ver = &desc_version; - map.key_ptr = &key; - map.buff_size = &buff_size; - priv.boot_params = boot_params; - priv.efi = &boot_params->efi_info; - - status = allocate_e820(boot_params, &e820ext, &e820ext_size); - if (status != EFI_SUCCESS) - return status; - - /* Might as well exit boot services now */ - status = efi_exit_boot_services(handle, &map, &priv, exit_boot_func); - if (status != EFI_SUCCESS) - return status; - - /* Historic? */ - boot_params->alt_mem_k = 32 * 1024; - - status = setup_e820(boot_params, e820ext, e820ext_size); - if (status != EFI_SUCCESS) - return status; - - return EFI_SUCCESS; -} - -/* - * On success we return a pointer to a boot_params structure, and NULL - * on failure. - */ -struct boot_params *efi_main(efi_handle_t handle, - efi_system_table_t *sys_table_arg, - struct boot_params *boot_params) -{ - struct desc_ptr *gdt = NULL; - struct setup_header *hdr = &boot_params->hdr; - efi_status_t status; - struct desc_struct *desc; - unsigned long cmdline_paddr; - - sys_table = sys_table_arg; - - /* Check if we were booted by the EFI firmware */ - if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) - goto fail; - - /* - * make_boot_params() may have been called before efi_main(), in which - * case this is the second time we parse the cmdline. This is ok, - * parsing the cmdline multiple times does not have side-effects. - */ - cmdline_paddr = ((u64)hdr->cmd_line_ptr | - ((u64)boot_params->ext_cmd_line_ptr << 32)); - efi_parse_options((char *)cmdline_paddr); - - /* - * If the boot loader gave us a value for secure_boot then we use that, - * otherwise we ask the BIOS. - */ - if (boot_params->secure_boot == efi_secureboot_mode_unset) - boot_params->secure_boot = efi_get_secureboot(); - - /* Ask the firmware to clear memory on unclean shutdown */ - efi_enable_reset_attack_mitigation(); - - efi_random_get_seed(); - - efi_retrieve_tpm2_eventlog(); - - setup_graphics(boot_params); - - setup_efi_pci(boot_params); - - setup_quirks(boot_params); - - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, sizeof(*gdt), - (void **)&gdt); - if (status != EFI_SUCCESS) { - efi_printk("Failed to allocate memory for 'gdt' structure\n"); - goto fail; - } - - gdt->size = 0x800; - status = efi_low_alloc(gdt->size, 8, (unsigned long *)&gdt->address); - if (status != EFI_SUCCESS) { - efi_printk("Failed to allocate memory for 'gdt'\n"); - goto fail; - } - - /* - * If the kernel isn't already loaded at the preferred load - * address, relocate it. - */ - if (hdr->pref_address != hdr->code32_start) { - unsigned long bzimage_addr = hdr->code32_start; - status = efi_relocate_kernel(&bzimage_addr, - hdr->init_size, hdr->init_size, - hdr->pref_address, - hdr->kernel_alignment, - LOAD_PHYSICAL_ADDR); - if (status != EFI_SUCCESS) { - efi_printk("efi_relocate_kernel() failed!\n"); - goto fail; - } - - hdr->pref_address = hdr->code32_start; - hdr->code32_start = bzimage_addr; - } - - status = exit_boot(boot_params, handle); - if (status != EFI_SUCCESS) { - efi_printk("exit_boot() failed!\n"); - goto fail; - } - - memset((char *)gdt->address, 0x0, gdt->size); - desc = (struct desc_struct *)gdt->address; - - /* The first GDT is a dummy. */ - desc++; - - if (IS_ENABLED(CONFIG_X86_64)) { - /* __KERNEL32_CS */ - desc->limit0 = 0xffff; - desc->base0 = 0x0000; - desc->base1 = 0x0000; - desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ; - desc->s = DESC_TYPE_CODE_DATA; - desc->dpl = 0; - desc->p = 1; - desc->limit1 = 0xf; - desc->avl = 0; - desc->l = 0; - desc->d = SEG_OP_SIZE_32BIT; - desc->g = SEG_GRANULARITY_4KB; - desc->base2 = 0x00; - - desc++; - } else { - /* Second entry is unused on 32-bit */ - desc++; - } - - /* __KERNEL_CS */ - desc->limit0 = 0xffff; - desc->base0 = 0x0000; - desc->base1 = 0x0000; - desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ; - desc->s = DESC_TYPE_CODE_DATA; - desc->dpl = 0; - desc->p = 1; - desc->limit1 = 0xf; - desc->avl = 0; - - if (IS_ENABLED(CONFIG_X86_64)) { - desc->l = 1; - desc->d = 0; - } else { - desc->l = 0; - desc->d = SEG_OP_SIZE_32BIT; - } - desc->g = SEG_GRANULARITY_4KB; - desc->base2 = 0x00; - desc++; - - /* __KERNEL_DS */ - desc->limit0 = 0xffff; - desc->base0 = 0x0000; - desc->base1 = 0x0000; - desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE; - desc->s = DESC_TYPE_CODE_DATA; - desc->dpl = 0; - desc->p = 1; - desc->limit1 = 0xf; - desc->avl = 0; - desc->l = 0; - desc->d = SEG_OP_SIZE_32BIT; - desc->g = SEG_GRANULARITY_4KB; - desc->base2 = 0x00; - desc++; - - if (IS_ENABLED(CONFIG_X86_64)) { - /* Task segment value */ - desc->limit0 = 0x0000; - desc->base0 = 0x0000; - desc->base1 = 0x0000; - desc->type = SEG_TYPE_TSS; - desc->s = 0; - desc->dpl = 0; - desc->p = 1; - desc->limit1 = 0x0; - desc->avl = 0; - desc->l = 0; - desc->d = 0; - desc->g = SEG_GRANULARITY_4KB; - desc->base2 = 0x00; - desc++; - } - - asm volatile("cli"); - asm volatile ("lgdt %0" : : "m" (*gdt)); - - return boot_params; -fail: - efi_printk("efi_main() failed!\n"); - - for (;;) - asm("hlt"); -} diff --git a/arch/x86/boot/compressed/eboot.h b/arch/x86/boot/compressed/eboot.h deleted file mode 100644 index 99f35343d443..000000000000 --- a/arch/x86/boot/compressed/eboot.h +++ /dev/null @@ -1,31 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef BOOT_COMPRESSED_EBOOT_H -#define BOOT_COMPRESSED_EBOOT_H - -#define SEG_TYPE_DATA (0 << 3) -#define SEG_TYPE_READ_WRITE (1 << 1) -#define SEG_TYPE_CODE (1 << 3) -#define SEG_TYPE_EXEC_READ (1 << 1) -#define SEG_TYPE_TSS ((1 << 3) | (1 << 0)) -#define SEG_OP_SIZE_32BIT (1 << 0) -#define SEG_GRANULARITY_4KB (1 << 0) - -#define DESC_TYPE_CODE_DATA (1 << 0) - -typedef union efi_uga_draw_protocol efi_uga_draw_protocol_t; - -union efi_uga_draw_protocol { - struct { - efi_status_t (__efiapi *get_mode)(efi_uga_draw_protocol_t *, - u32*, u32*, u32*, u32*); - void *set_mode; - void *blt; - }; - struct { - u32 get_mode; - u32 set_mode; - u32 blt; - } mixed_mode; -}; - -#endif /* BOOT_COMPRESSED_EBOOT_H */ diff --git a/arch/x86/boot/compressed/efi_thunk_64.S b/arch/x86/boot/compressed/efi_thunk_64.S index 8fb7f6799c52..2b2049259619 100644 --- a/arch/x86/boot/compressed/efi_thunk_64.S +++ b/arch/x86/boot/compressed/efi_thunk_64.S @@ -54,11 +54,16 @@ SYM_FUNC_START(__efi64_thunk) * Switch to gdt with 32-bit segments. This is the firmware GDT * that was installed when the kernel started executing. This * pointer was saved at the EFI stub entry point in head_64.S. + * + * Pass the saved DS selector to the 32-bit code, and use far return to + * restore the saved CS selector. */ leaq efi32_boot_gdt(%rip), %rax lgdt (%rax) - pushq $__KERNEL_CS + movzwl efi32_boot_ds(%rip), %edx + movzwq efi32_boot_cs(%rip), %rax + pushq %rax leaq efi_enter32(%rip), %rax pushq %rax lretq @@ -73,6 +78,10 @@ SYM_FUNC_START(__efi64_thunk) movl %ebx, %es pop %rbx movl %ebx, %ds + /* Clear out 32-bit selector from FS and GS */ + xorl %ebx, %ebx + movl %ebx, %fs + movl %ebx, %gs /* * Convert 32-bit status code into 64-bit. @@ -92,10 +101,12 @@ SYM_FUNC_END(__efi64_thunk) * The stack should represent the 32-bit calling convention. */ SYM_FUNC_START_LOCAL(efi_enter32) - movl $__KERNEL_DS, %eax - movl %eax, %ds - movl %eax, %es - movl %eax, %ss + /* Load firmware selector into data and stack segment registers */ + movl %edx, %ds + movl %edx, %es + movl %edx, %fs + movl %edx, %gs + movl %edx, %ss /* Reload pgtables */ movl %cr3, %eax @@ -157,6 +168,14 @@ SYM_DATA_START(efi32_boot_gdt) .quad 0 SYM_DATA_END(efi32_boot_gdt) +SYM_DATA_START(efi32_boot_cs) + .word 0 +SYM_DATA_END(efi32_boot_cs) + +SYM_DATA_START(efi32_boot_ds) + .word 0 +SYM_DATA_END(efi32_boot_ds) + SYM_DATA_START(efi_gdt64) .word efi_gdt64_end - efi_gdt64 .long 0 /* Filled out by user */ diff --git a/arch/x86/boot/compressed/head_32.S b/arch/x86/boot/compressed/head_32.S index 73f17d0544dd..356060c5332c 100644 --- a/arch/x86/boot/compressed/head_32.S +++ b/arch/x86/boot/compressed/head_32.S @@ -63,21 +63,7 @@ __HEAD SYM_FUNC_START(startup_32) cld - /* - * Test KEEP_SEGMENTS flag to see if the bootloader is asking - * us to not reload segments - */ - testb $KEEP_SEGMENTS, BP_loadflags(%esi) - jnz 1f - cli - movl $__BOOT_DS, %eax - movl %eax, %ds - movl %eax, %es - movl %eax, %fs - movl %eax, %gs - movl %eax, %ss -1: /* * Calculate the delta between where we were compiled to run @@ -92,6 +78,19 @@ SYM_FUNC_START(startup_32) 1: popl %ebp subl $1b, %ebp + /* Load new GDT */ + leal gdt(%ebp), %eax + movl %eax, 2(%eax) + lgdt (%eax) + + /* Load segment registers with our descriptors */ + movl $__BOOT_DS, %eax + movl %eax, %ds + movl %eax, %es + movl %eax, %fs + movl %eax, %gs + movl %eax, %ss + /* * %ebp contains the address we are loaded at by the boot loader and %ebx * contains the address where we should move the kernel image temporarily @@ -137,6 +136,16 @@ SYM_FUNC_START(startup_32) cld popl %esi + /* + * The GDT may get overwritten either during the copy we just did or + * during extract_kernel below. To avoid any issues, repoint the GDTR + * to the new copy of the GDT. EAX still contains the previously + * calculated relocation offset of init_size - _end. + */ + leal gdt(%ebx), %edx + addl %eax, 2(%edx) + lgdt (%edx) + /* * Jump to the relocated address. */ @@ -209,6 +218,17 @@ SYM_FUNC_START_LOCAL_NOALIGN(.Lrelocated) jmp *%eax SYM_FUNC_END(.Lrelocated) + .data + .balign 8 +SYM_DATA_START_LOCAL(gdt) + .word gdt_end - gdt - 1 + .long 0 + .word 0 + .quad 0x0000000000000000 /* Reserved */ + .quad 0x00cf9a000000ffff /* __KERNEL_CS */ + .quad 0x00cf92000000ffff /* __KERNEL_DS */ +SYM_DATA_END_LABEL(gdt, SYM_L_LOCAL, gdt_end) + /* * Stack and heap for uncompression */ diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index 1f1f6c8139b3..f7bacc4c1494 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -53,19 +53,7 @@ SYM_FUNC_START(startup_32) * all need to be under the 4G limit. */ cld - /* - * Test KEEP_SEGMENTS flag to see if the bootloader is asking - * us to not reload segments - */ - testb $KEEP_SEGMENTS, BP_loadflags(%esi) - jnz 1f - cli - movl $(__BOOT_DS), %eax - movl %eax, %ds - movl %eax, %es - movl %eax, %ss -1: /* * Calculate the delta between where we were compiled to run @@ -80,10 +68,21 @@ SYM_FUNC_START(startup_32) 1: popl %ebp subl $1b, %ebp + /* Load new GDT with the 64bit segments using 32bit descriptor */ + leal gdt(%ebp), %eax + movl %eax, 2(%eax) + lgdt (%eax) + + /* Load segment registers with our descriptors */ + movl $__BOOT_DS, %eax + movl %eax, %ds + movl %eax, %es + movl %eax, %fs + movl %eax, %gs + movl %eax, %ss + /* setup a stack and make sure cpu supports long mode. */ - movl $boot_stack_end, %eax - addl %ebp, %eax - movl %eax, %esp + leal boot_stack_end(%ebp), %esp call verify_cpu testl %eax, %eax @@ -120,10 +119,6 @@ SYM_FUNC_START(startup_32) * Prepare for entering 64 bit mode */ - /* Load new GDT with the 64bit segments using 32bit descriptor */ - addl %ebp, gdt+2(%ebp) - lgdt gdt(%ebp) - /* Enable PAE mode */ movl %cr4, %eax orl $X86_CR4_PAE, %eax @@ -212,8 +207,13 @@ SYM_FUNC_START(startup_32) cmp $0, %edi jz 1f leal efi64_stub_entry(%ebp), %eax - movl %esi, %edx movl efi32_boot_args+4(%ebp), %esi + movl efi32_boot_args+8(%ebp), %edx // saved bootparams pointer + cmpl $0, %edx + jnz 1f + leal efi_pe_entry(%ebp), %eax + movl %edi, %ecx // MS calling convention + movl %esi, %edx 1: #endif pushl %eax @@ -238,11 +238,17 @@ SYM_FUNC_START(efi32_stub_entry) 1: pop %ebp subl $1b, %ebp + movl %esi, efi32_boot_args+8(%ebp) +SYM_INNER_LABEL(efi32_pe_stub_entry, SYM_L_LOCAL) movl %ecx, efi32_boot_args(%ebp) movl %edx, efi32_boot_args+4(%ebp) - sgdtl efi32_boot_gdt(%ebp) movb $0, efi_is64(%ebp) + /* Save firmware GDTR and code/data selectors */ + sgdtl efi32_boot_gdt(%ebp) + movw %cs, efi32_boot_cs(%ebp) + movw %ds, efi32_boot_ds(%ebp) + /* Disable paging */ movl %cr0, %eax btrl $X86_CR0_PG_BIT, %eax @@ -266,6 +272,9 @@ SYM_CODE_START(startup_64) * and command line. */ + cld + cli + /* Setup data segments. */ xorl %eax, %eax movl %eax, %ds @@ -354,9 +363,9 @@ SYM_CODE_START(startup_64) */ /* Make sure we have GDT with 32-bit code segment */ - leaq gdt(%rip), %rax - movq %rax, gdt64+2(%rip) - lgdt gdt64(%rip) + leaq gdt64(%rip), %rax + addq %rax, 2(%rax) + lgdt (%rax) /* * paging_prepare() sets up the trampoline and checks if we need to @@ -441,6 +450,16 @@ trampoline_return: cld popq %rsi + /* + * The GDT may get overwritten either during the copy we just did or + * during extract_kernel below. To avoid any issues, repoint the GDTR + * to the new copy of the GDT. + */ + leaq gdt64(%rbx), %rax + subq %rbp, 2(%rax) + addq %rbx, 2(%rax) + lgdt (%rax) + /* * Jump to the relocated address. */ @@ -613,13 +632,13 @@ SYM_FUNC_END(.Lno_longmode) .data SYM_DATA_START_LOCAL(gdt64) - .word gdt_end - gdt - .quad 0 + .word gdt_end - gdt - 1 + .quad gdt - gdt64 SYM_DATA_END(gdt64) .balign 8 SYM_DATA_START_LOCAL(gdt) - .word gdt_end - gdt - .long gdt + .word gdt_end - gdt - 1 + .long 0 .word 0 .quad 0x00cf9a000000ffff /* __KERNEL32_CS */ .quad 0x00af9a000000ffff /* __KERNEL_CS */ @@ -629,8 +648,56 @@ SYM_DATA_START_LOCAL(gdt) SYM_DATA_END_LABEL(gdt, SYM_L_LOCAL, gdt_end) #ifdef CONFIG_EFI_MIXED -SYM_DATA_LOCAL(efi32_boot_args, .long 0, 0) +SYM_DATA_LOCAL(efi32_boot_args, .long 0, 0, 0) SYM_DATA(efi_is64, .byte 1) + +#define ST32_boottime 60 // offsetof(efi_system_table_32_t, boottime) +#define BS32_handle_protocol 88 // offsetof(efi_boot_services_32_t, handle_protocol) +#define LI32_image_base 32 // offsetof(efi_loaded_image_32_t, image_base) + + .text + .code32 +SYM_FUNC_START(efi32_pe_entry) + pushl %ebp + + call verify_cpu // check for long mode support + testl %eax, %eax + movl $0x80000003, %eax // EFI_UNSUPPORTED + jnz 3f + + call 1f +1: pop %ebp + subl $1b, %ebp + + /* Get the loaded image protocol pointer from the image handle */ + subl $12, %esp // space for the loaded image pointer + pushl %esp // pass its address + leal 4f(%ebp), %eax + pushl %eax // pass the GUID address + pushl 28(%esp) // pass the image handle + + movl 36(%esp), %eax // sys_table + movl ST32_boottime(%eax), %eax // sys_table->boottime + call *BS32_handle_protocol(%eax) // sys_table->boottime->handle_protocol + cmp $0, %eax + jnz 2f + + movl 32(%esp), %ecx // image_handle + movl 36(%esp), %edx // sys_table + movl 12(%esp), %esi // loaded_image + movl LI32_image_base(%esi), %esi // loaded_image->image_base + jmp efi32_pe_stub_entry + +2: addl $24, %esp +3: popl %ebp + ret +SYM_FUNC_END(efi32_pe_entry) + + .section ".rodata" + /* EFI loaded image protocol GUID */ +4: .long 0x5B1B31A1 + .word 0x9562, 0x11d2 + .byte 0x8E, 0x3F, 0x00, 0xA0, 0xC9, 0x69, 0x72, 0x3B #endif /* diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S index 97d9b6d6c1af..4ee25e28996f 100644 --- a/arch/x86/boot/header.S +++ b/arch/x86/boot/header.S @@ -15,7 +15,7 @@ * hex while segment addresses are written as segment:offset. * */ - +#include <linux/pe.h> #include <asm/segment.h> #include <asm/boot.h> #include <asm/page_types.h> @@ -43,8 +43,7 @@ SYSSEG = 0x1000 /* historical load address >> 4 */ bootsect_start: #ifdef CONFIG_EFI_STUB # "MZ", MS-DOS header - .byte 0x4d - .byte 0x5a + .word MZ_MAGIC #endif # Normalize the start address @@ -97,39 +96,30 @@ bugger_off_msg: #ifdef CONFIG_EFI_STUB pe_header: - .ascii "PE" - .word 0 + .long PE_MAGIC coff_header: #ifdef CONFIG_X86_32 - .word 0x14c # i386 + .set image_file_add_flags, IMAGE_FILE_32BIT_MACHINE + .set pe_opt_magic, PE_OPT_MAGIC_PE32 + .word IMAGE_FILE_MACHINE_I386 #else - .word 0x8664 # x86-64 + .set image_file_add_flags, 0 + .set pe_opt_magic, PE_OPT_MAGIC_PE32PLUS + .word IMAGE_FILE_MACHINE_AMD64 #endif - .word 4 # nr_sections + .word section_count # nr_sections .long 0 # TimeDateStamp .long 0 # PointerToSymbolTable .long 1 # NumberOfSymbols .word section_table - optional_header # SizeOfOptionalHeader -#ifdef CONFIG_X86_32 - .word 0x306 # Characteristics. - # IMAGE_FILE_32BIT_MACHINE | - # IMAGE_FILE_DEBUG_STRIPPED | - # IMAGE_FILE_EXECUTABLE_IMAGE | - # IMAGE_FILE_LINE_NUMS_STRIPPED -#else - .word 0x206 # Characteristics - # IMAGE_FILE_DEBUG_STRIPPED | - # IMAGE_FILE_EXECUTABLE_IMAGE | - # IMAGE_FILE_LINE_NUMS_STRIPPED -#endif + .word IMAGE_FILE_EXECUTABLE_IMAGE | \ + image_file_add_flags | \ + IMAGE_FILE_DEBUG_STRIPPED | \ + IMAGE_FILE_LINE_NUMS_STRIPPED # Characteristics optional_header: -#ifdef CONFIG_X86_32 - .word 0x10b # PE32 format -#else - .word 0x20b # PE32+ format -#endif + .word pe_opt_magic .byte 0x02 # MajorLinkerVersion .byte 0x14 # MinorLinkerVersion @@ -157,8 +147,8 @@ extra_header_fields: .long 0x20 # FileAlignment .word 0 # MajorOperatingSystemVersion .word 0 # MinorOperatingSystemVersion - .word 0 # MajorImageVersion - .word 0 # MinorImageVersion + .word LINUX_EFISTUB_MAJOR_VERSION # MajorImageVersion + .word LINUX_EFISTUB_MINOR_VERSION # MinorImageVersion .word 0 # MajorSubsystemVersion .word 0 # MinorSubsystemVersion .long 0 # Win32VersionValue @@ -170,7 +160,7 @@ extra_header_fields: .long 0x200 # SizeOfHeaders .long 0 # CheckSum - .word 0xa # Subsystem (EFI application) + .word IMAGE_SUBSYSTEM_EFI_APPLICATION # Subsystem (EFI application) .word 0 # DllCharacteristics #ifdef CONFIG_X86_32 .long 0 # SizeOfStackReserve @@ -184,7 +174,7 @@ extra_header_fields: .quad 0 # SizeOfHeapCommit #endif .long 0 # LoaderFlags - .long 0x6 # NumberOfRvaAndSizes + .long (section_table - .) / 8 # NumberOfRvaAndSizes .quad 0 # ExportTable .quad 0 # ImportTable @@ -210,7 +200,10 @@ section_table: .long 0 # PointerToLineNumbers .word 0 # NumberOfRelocations .word 0 # NumberOfLineNumbers - .long 0x60500020 # Characteristics (section flags) + .long IMAGE_SCN_CNT_CODE | \ + IMAGE_SCN_MEM_READ | \ + IMAGE_SCN_MEM_EXECUTE | \ + IMAGE_SCN_ALIGN_16BYTES # Characteristics # # The EFI application loader requires a relocation section @@ -228,45 +221,53 @@ section_table: .long 0 # PointerToLineNumbers .word 0 # NumberOfRelocations .word 0 # NumberOfLineNumbers - .long 0x42100040 # Characteristics (section flags) + .long IMAGE_SCN_CNT_INITIALIZED_DATA | \ + IMAGE_SCN_MEM_READ | \ + IMAGE_SCN_MEM_DISCARDABLE | \ + IMAGE_SCN_ALIGN_1BYTES # Characteristics +#ifdef CONFIG_EFI_MIXED # # The offset & size fields are filled in by build.c. # - .ascii ".text" - .byte 0 - .byte 0 - .byte 0 + .asciz ".compat" .long 0 - .long 0x0 # startup_{32,64} + .long 0x0 .long 0 # Size of initialized data # on disk - .long 0x0 # startup_{32,64} + .long 0x0 .long 0 # PointerToRelocations .long 0 # PointerToLineNumbers .word 0 # NumberOfRelocations .word 0 # NumberOfLineNumbers - .long 0x60500020 # Characteristics (section flags) + .long IMAGE_SCN_CNT_INITIALIZED_DATA | \ + IMAGE_SCN_MEM_READ | \ + IMAGE_SCN_MEM_DISCARDABLE | \ + IMAGE_SCN_ALIGN_1BYTES # Characteristics +#endif # # The offset & size fields are filled in by build.c. # - .ascii ".bss" - .byte 0 + .ascii ".text" .byte 0 .byte 0 .byte 0 .long 0 - .long 0x0 + .long 0x0 # startup_{32,64} .long 0 # Size of initialized data # on disk - .long 0x0 + .long 0x0 # startup_{32,64} .long 0 # PointerToRelocations .long 0 # PointerToLineNumbers .word 0 # NumberOfRelocations .word 0 # NumberOfLineNumbers - .long 0xc8000080 # Characteristics (section flags) + .long IMAGE_SCN_CNT_CODE | \ + IMAGE_SCN_MEM_READ | \ + IMAGE_SCN_MEM_EXECUTE | \ + IMAGE_SCN_ALIGN_16BYTES # Characteristics + .set section_count, (. - section_table) / 40 #endif /* CONFIG_EFI_STUB */ # Kernel attributes; used by setup. This is part 1 of the diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c index 55e669d29e54..90d403dfec80 100644 --- a/arch/x86/boot/tools/build.c +++ b/arch/x86/boot/tools/build.c @@ -53,9 +53,16 @@ u8 buf[SETUP_SECT_MAX*512]; #define PECOFF_RELOC_RESERVE 0x20 +#ifdef CONFIG_EFI_MIXED +#define PECOFF_COMPAT_RESERVE 0x20 +#else +#define PECOFF_COMPAT_RESERVE 0x0 +#endif + unsigned long efi32_stub_entry; unsigned long efi64_stub_entry; unsigned long efi_pe_entry; +unsigned long efi32_pe_entry; unsigned long kernel_info; unsigned long startup_64; @@ -189,7 +196,10 @@ static void update_pecoff_section_header(char *section_name, u32 offset, u32 siz static void update_pecoff_setup_and_reloc(unsigned int size) { u32 setup_offset = 0x200; - u32 reloc_offset = size - PECOFF_RELOC_RESERVE; + u32 reloc_offset = size - PECOFF_RELOC_RESERVE - PECOFF_COMPAT_RESERVE; +#ifdef CONFIG_EFI_MIXED + u32 compat_offset = reloc_offset + PECOFF_RELOC_RESERVE; +#endif u32 setup_size = reloc_offset - setup_offset; update_pecoff_section_header(".setup", setup_offset, setup_size); @@ -201,43 +211,63 @@ static void update_pecoff_setup_and_reloc(unsigned int size) */ put_unaligned_le32(reloc_offset + 10, &buf[reloc_offset]); put_unaligned_le32(10, &buf[reloc_offset + 4]); + +#ifdef CONFIG_EFI_MIXED + update_pecoff_section_header(".compat", compat_offset, PECOFF_COMPAT_RESERVE); + + /* + * Put the IA-32 machine type (0x14c) and the associated entry point + * address in the .compat section, so loaders can figure out which other + * execution modes this image supports. + */ + buf[compat_offset] = 0x1; + buf[compat_offset + 1] = 0x8; + put_unaligned_le16(0x14c, &buf[compat_offset + 2]); + put_unaligned_le32(efi32_pe_entry + size, &buf[compat_offset + 4]); +#endif } -static void update_pecoff_text(unsigned int text_start, unsigned int file_sz) +static void update_pecoff_text(unsigned int text_start, unsigned int file_sz, + unsigned int init_sz) { unsigned int pe_header; unsigned int text_sz = file_sz - text_start; + unsigned int bss_sz = init_sz + text_start - file_sz; pe_header = get_unaligned_le32(&buf[0x3c]); +#ifdef CONFIG_EFI_MIXED + /* + * In mixed mode, we will execute startup_32() at whichever offset in + * memory it happened to land when the PE/COFF loader loaded the image, + * which may be misaligned with respect to the kernel_alignment field + * in the setup header. + * + * In order for startup_32 to safely execute in place at this offset, + * we need to ensure that the CONFIG_PHYSICAL_ALIGN aligned allocation + * it creates for the page tables does not extend beyond the declared + * size of the image in the PE/COFF header. So add the required slack. + */ + bss_sz += CONFIG_PHYSICAL_ALIGN; + init_sz += CONFIG_PHYSICAL_ALIGN; +#endif + /* * Size of code: Subtract the size of the first sector (512 bytes) * which includes the header. */ - put_unaligned_le32(file_sz - 512, &buf[pe_header + 0x1c]); + put_unaligned_le32(file_sz - 512 + bss_sz, &buf[pe_header + 0x1c]); + + /* Size of image */ + put_unaligned_le32(init_sz + text_start, &buf[pe_header + 0x50]); /* * Address of entry point for PE/COFF executable */ put_unaligned_le32(text_start + efi_pe_entry, &buf[pe_header + 0x28]); - update_pecoff_section_header(".text", text_start, text_sz); -} - -static void update_pecoff_bss(unsigned int file_sz, unsigned int init_sz) -{ - unsigned int pe_header; - unsigned int bss_sz = init_sz - file_sz; - - pe_header = get_unaligned_le32(&buf[0x3c]); - - /* Size of uninitialized data */ - put_unaligned_le32(bss_sz, &buf[pe_header + 0x24]); - - /* Size of image */ - put_unaligned_le32(init_sz, &buf[pe_header + 0x50]); - - update_pecoff_section_header_fields(".bss", file_sz, bss_sz, 0, 0); + update_pecoff_section_header_fields(".text", text_start, text_sz + bss_sz, + text_sz, text_start); } static int reserve_pecoff_reloc_section(int c) @@ -278,9 +308,8 @@ static void efi_stub_entry_update(void) static inline void update_pecoff_setup_and_reloc(unsigned int size) {} static inline void update_pecoff_text(unsigned int text_start, - unsigned int file_sz) {} -static inline void update_pecoff_bss(unsigned int file_sz, - unsigned int init_sz) {} + unsigned int file_sz, + unsigned int init_sz) {} static inline void efi_stub_defaults(void) {} static inline void efi_stub_entry_update(void) {} @@ -290,6 +319,12 @@ static inline int reserve_pecoff_reloc_section(int c) } #endif /* CONFIG_EFI_STUB */ +static int reserve_pecoff_compat_section(int c) +{ + /* Reserve 0x20 bytes for .compat section */ + memset(buf+c, 0, PECOFF_COMPAT_RESERVE); + return PECOFF_COMPAT_RESERVE; +} /* * Parse zoffset.h and find the entry points. We could just #include zoffset.h @@ -322,6 +357,7 @@ static void parse_zoffset(char *fname) PARSE_ZOFS(p, efi32_stub_entry); PARSE_ZOFS(p, efi64_stub_entry); PARSE_ZOFS(p, efi_pe_entry); + PARSE_ZOFS(p, efi32_pe_entry); PARSE_ZOFS(p, kernel_info); PARSE_ZOFS(p, startup_64); @@ -365,6 +401,7 @@ int main(int argc, char ** argv) die("Boot block hasn't got boot flag (0xAA55)"); fclose(file); + c += reserve_pecoff_compat_section(c); c += reserve_pecoff_reloc_section(c); /* Pad unused space with zeros */ @@ -406,9 +443,8 @@ int main(int argc, char ** argv) buf[0x1f1] = setup_sectors-1; put_unaligned_le32(sys_size, &buf[0x1f4]); - update_pecoff_text(setup_sectors * 512, i + (sys_size * 16)); init_sz = get_unaligned_le32(&buf[0x260]); - update_pecoff_bss(i + (sys_size * 16), init_sz); + update_pecoff_text(setup_sectors * 512, i + (sys_size * 16), init_sz); efi_stub_entry_update(); |