powerpc: Add support code for kexec_file_load() (a0458284) · Commits · 戴 / test

arch/powerpc/include/asm/kexec.h

+10 −0

Original line number	Diff line number	Diff line
		@@ -91,6 +91,16 @@ static inline bool kdump_in_progress(void)
		return crashing_cpu >= 0;
		}

		#ifdef CONFIG_KEXEC_FILE
		extern struct kexec_file_ops kexec_elf64_ops;

		int setup_purgatory(struct kimage image, const void slave_code,
		const void *fdt, unsigned long kernel_load_addr,
		unsigned long fdt_load_addr);
		int setup_new_fdt(void *fdt, unsigned long initrd_load_addr,
		unsigned long initrd_len, const char *cmdline);
		#endif /* CONFIG_KEXEC_FILE */

		#else /* !CONFIG_KEXEC_CORE */
		static inline void crash_kexec_secondary(struct pt_regs *regs) { }

arch/powerpc/kernel/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -111,6 +111,7 @@ obj-$(CONFIG_PCI) += pci_$(BITS).o $(pci64-y) \
		obj-$(CONFIG_PCI_MSI) += msi.o
		obj-$(CONFIG_KEXEC_CORE) += machine_kexec.o crash.o \
		machine_kexec_$(BITS).o
		obj-$(CONFIG_KEXEC_FILE) += machine_kexec_file_$(BITS).o kexec_elf_$(BITS).o
		obj-$(CONFIG_AUDIT) += audit.o
		obj64-$(CONFIG_AUDIT) += compat_audit.o

arch/powerpc/kernel/kexec_elf_64.c

0 → 100644

+663 −0

Original line number	Diff line number	Diff line
		/*
		* Load ELF vmlinux file for the kexec_file_load syscall.
		*
		* Copyright (C) 2004 Adam Litke (agl@us.ibm.com)
		* Copyright (C) 2004 IBM Corp.
		* Copyright (C) 2005 R Sharada (sharada@in.ibm.com)
		* Copyright (C) 2006 Mohan Kumar M (mohan@in.ibm.com)
		* Copyright (C) 2016 IBM Corporation
		*
		* Based on kexec-tools' kexec-elf-exec.c and kexec-elf-ppc64.c.
		* Heavily modified for the kernel by
		* Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>.
		*
		* This program 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 (version 2 of the License).
		*
		* This program 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.
		*/

		#define pr_fmt(fmt) "kexec_elf: " fmt

		#include <linux/elf.h>
		#include <linux/kexec.h>
		#include <linux/libfdt.h>
		#include <linux/module.h>
		#include <linux/of_fdt.h>
		#include <linux/slab.h>
		#include <linux/types.h>

		#define PURGATORY_STACK_SIZE (16 * 1024)

		#define elf_addr_to_cpu elf64_to_cpu

		#ifndef Elf_Rel
		#define Elf_Rel Elf64_Rel
		#endif /* Elf_Rel */

		struct elf_info {
		/*
		* Where the ELF binary contents are kept.
		* Memory managed by the user of the struct.
		*/
		const char *buffer;

		const struct elfhdr *ehdr;
		const struct elf_phdr *proghdrs;
		struct elf_shdr *sechdrs;
		};

		static inline bool elf_is_elf_file(const struct elfhdr *ehdr)
		{
		return memcmp(ehdr->e_ident, ELFMAG, SELFMAG) == 0;
		}

		static uint64_t elf64_to_cpu(const struct elfhdr *ehdr, uint64_t value)
		{
		if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB)
		value = le64_to_cpu(value);
		else if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB)
		value = be64_to_cpu(value);

		return value;
		}

		static uint16_t elf16_to_cpu(const struct elfhdr *ehdr, uint16_t value)
		{
		if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB)
		value = le16_to_cpu(value);
		else if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB)
		value = be16_to_cpu(value);

		return value;
		}

		static uint32_t elf32_to_cpu(const struct elfhdr *ehdr, uint32_t value)
		{
		if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB)
		value = le32_to_cpu(value);
		else if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB)
		value = be32_to_cpu(value);

		return value;
		}

		/**
		* elf_is_ehdr_sane - check that it is safe to use the ELF header
		* @buf_len: size of the buffer in which the ELF file is loaded.
		*/
		static bool elf_is_ehdr_sane(const struct elfhdr *ehdr, size_t buf_len)
		{
		if (ehdr->e_phnum > 0 && ehdr->e_phentsize != sizeof(struct elf_phdr)) {
		pr_debug("Bad program header size.\n");
		return false;
		} else if (ehdr->e_shnum > 0 &&
		ehdr->e_shentsize != sizeof(struct elf_shdr)) {
		pr_debug("Bad section header size.\n");
		return false;
		} else if (ehdr->e_ident[EI_VERSION] != EV_CURRENT \|\|
		ehdr->e_version != EV_CURRENT) {
		pr_debug("Unknown ELF version.\n");
		return false;
		}

		if (ehdr->e_phoff > 0 && ehdr->e_phnum > 0) {
		size_t phdr_size;

		/*
		* e_phnum is at most 65535 so calculating the size of the
		* program header cannot overflow.
		*/
		phdr_size = sizeof(struct elf_phdr) * ehdr->e_phnum;

		/* Sanity check the program header table location. */
		if (ehdr->e_phoff + phdr_size < ehdr->e_phoff) {
		pr_debug("Program headers at invalid location.\n");
		return false;
		} else if (ehdr->e_phoff + phdr_size > buf_len) {
		pr_debug("Program headers truncated.\n");
		return false;
		}
		}

		if (ehdr->e_shoff > 0 && ehdr->e_shnum > 0) {
		size_t shdr_size;

		/*
		* e_shnum is at most 65536 so calculating
		* the size of the section header cannot overflow.
		*/
		shdr_size = sizeof(struct elf_shdr) * ehdr->e_shnum;

		/* Sanity check the section header table location. */
		if (ehdr->e_shoff + shdr_size < ehdr->e_shoff) {
		pr_debug("Section headers at invalid location.\n");
		return false;
		} else if (ehdr->e_shoff + shdr_size > buf_len) {
		pr_debug("Section headers truncated.\n");
		return false;
		}
		}

		return true;
		}

		static int elf_read_ehdr(const char buf, size_t len, struct elfhdr ehdr)
		{
		struct elfhdr *buf_ehdr;

		if (len < sizeof(*buf_ehdr)) {
		pr_debug("Buffer is too small to hold ELF header.\n");
		return -ENOEXEC;
		}

		memset(ehdr, 0, sizeof(*ehdr));
		memcpy(ehdr->e_ident, buf, sizeof(ehdr->e_ident));
		if (!elf_is_elf_file(ehdr)) {
		pr_debug("No ELF header magic.\n");
		return -ENOEXEC;
		}

		if (ehdr->e_ident[EI_CLASS] != ELF_CLASS) {
		pr_debug("Not a supported ELF class.\n");
		return -ENOEXEC;
		} else if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB &&
		ehdr->e_ident[EI_DATA] != ELFDATA2MSB) {
		pr_debug("Not a supported ELF data format.\n");
		return -ENOEXEC;
		}

		buf_ehdr = (struct elfhdr *) buf;
		if (elf16_to_cpu(ehdr, buf_ehdr->e_ehsize) != sizeof(*buf_ehdr)) {
		pr_debug("Bad ELF header size.\n");
		return -ENOEXEC;
		}

		ehdr->e_type = elf16_to_cpu(ehdr, buf_ehdr->e_type);
		ehdr->e_machine = elf16_to_cpu(ehdr, buf_ehdr->e_machine);
		ehdr->e_version = elf32_to_cpu(ehdr, buf_ehdr->e_version);
		ehdr->e_entry = elf_addr_to_cpu(ehdr, buf_ehdr->e_entry);
		ehdr->e_phoff = elf_addr_to_cpu(ehdr, buf_ehdr->e_phoff);
		ehdr->e_shoff = elf_addr_to_cpu(ehdr, buf_ehdr->e_shoff);
		ehdr->e_flags = elf32_to_cpu(ehdr, buf_ehdr->e_flags);
		ehdr->e_phentsize = elf16_to_cpu(ehdr, buf_ehdr->e_phentsize);
		ehdr->e_phnum = elf16_to_cpu(ehdr, buf_ehdr->e_phnum);
		ehdr->e_shentsize = elf16_to_cpu(ehdr, buf_ehdr->e_shentsize);
		ehdr->e_shnum = elf16_to_cpu(ehdr, buf_ehdr->e_shnum);
		ehdr->e_shstrndx = elf16_to_cpu(ehdr, buf_ehdr->e_shstrndx);

		return elf_is_ehdr_sane(ehdr, len) ? 0 : -ENOEXEC;
		}

		/**
		* elf_is_phdr_sane - check that it is safe to use the program header
		* @buf_len: size of the buffer in which the ELF file is loaded.
		*/
		static bool elf_is_phdr_sane(const struct elf_phdr *phdr, size_t buf_len)
		{

		if (phdr->p_offset + phdr->p_filesz < phdr->p_offset) {
		pr_debug("ELF segment location wraps around.\n");
		return false;
		} else if (phdr->p_offset + phdr->p_filesz > buf_len) {
		pr_debug("ELF segment not in file.\n");
		return false;
		} else if (phdr->p_paddr + phdr->p_memsz < phdr->p_paddr) {
		pr_debug("ELF segment address wraps around.\n");
		return false;
		}

		return true;
		}

		static int elf_read_phdr(const char buf, size_t len, struct elf_info elf_info,
		int idx)
		{
		/* Override the const in proghdrs, we are the ones doing the loading. */
		struct elf_phdr phdr = (struct elf_phdr ) &elf_info->proghdrs[idx];
		const char *pbuf;
		struct elf_phdr *buf_phdr;

		pbuf = buf + elf_info->ehdr->e_phoff + (idx * sizeof(*buf_phdr));
		buf_phdr = (struct elf_phdr *) pbuf;

		phdr->p_type = elf32_to_cpu(elf_info->ehdr, buf_phdr->p_type);
		phdr->p_offset = elf_addr_to_cpu(elf_info->ehdr, buf_phdr->p_offset);
		phdr->p_paddr = elf_addr_to_cpu(elf_info->ehdr, buf_phdr->p_paddr);
		phdr->p_vaddr = elf_addr_to_cpu(elf_info->ehdr, buf_phdr->p_vaddr);
		phdr->p_flags = elf32_to_cpu(elf_info->ehdr, buf_phdr->p_flags);

		/*
		* The following fields have a type equivalent to Elf_Addr
		* both in 32 bit and 64 bit ELF.
		*/
		phdr->p_filesz = elf_addr_to_cpu(elf_info->ehdr, buf_phdr->p_filesz);
		phdr->p_memsz = elf_addr_to_cpu(elf_info->ehdr, buf_phdr->p_memsz);
		phdr->p_align = elf_addr_to_cpu(elf_info->ehdr, buf_phdr->p_align);

		return elf_is_phdr_sane(phdr, len) ? 0 : -ENOEXEC;
		}

		/**
		* elf_read_phdrs - read the program headers from the buffer
		*
		* This function assumes that the program header table was checked for sanity.
		* Use elf_is_ehdr_sane() if it wasn't.
		*/
		static int elf_read_phdrs(const char *buf, size_t len,
		struct elf_info *elf_info)
		{
		size_t phdr_size, i;
		const struct elfhdr *ehdr = elf_info->ehdr;

		/*
		* e_phnum is at most 65535 so calculating the size of the
		* program header cannot overflow.
		*/
		phdr_size = sizeof(struct elf_phdr) * ehdr->e_phnum;

		elf_info->proghdrs = kzalloc(phdr_size, GFP_KERNEL);
		if (!elf_info->proghdrs)
		return -ENOMEM;

		for (i = 0; i < ehdr->e_phnum; i++) {
		int ret;

		ret = elf_read_phdr(buf, len, elf_info, i);
		if (ret) {
		kfree(elf_info->proghdrs);
		elf_info->proghdrs = NULL;
		return ret;
		}
		}

		return 0;
		}

		/**
		* elf_is_shdr_sane - check that it is safe to use the section header
		* @buf_len: size of the buffer in which the ELF file is loaded.
		*/
		static bool elf_is_shdr_sane(const struct elf_shdr *shdr, size_t buf_len)
		{
		bool size_ok;

		/* SHT_NULL headers have undefined values, so we can't check them. */
		if (shdr->sh_type == SHT_NULL)
		return true;

		/* Now verify sh_entsize */
		switch (shdr->sh_type) {
		case SHT_SYMTAB:
		size_ok = shdr->sh_entsize == sizeof(Elf_Sym);
		break;
		case SHT_RELA:
		size_ok = shdr->sh_entsize == sizeof(Elf_Rela);
		break;
		case SHT_DYNAMIC:
		size_ok = shdr->sh_entsize == sizeof(Elf_Dyn);
		break;
		case SHT_REL:
		size_ok = shdr->sh_entsize == sizeof(Elf_Rel);
		break;
		case SHT_NOTE:
		case SHT_PROGBITS:
		case SHT_HASH:
		case SHT_NOBITS:
		default:
		/*
		* This is a section whose entsize requirements
		* I don't care about. If I don't know about
		* the section I can't care about it's entsize
		* requirements.
		*/
		size_ok = true;
		break;
		}

		if (!size_ok) {
		pr_debug("ELF section with wrong entry size.\n");
		return false;
		} else if (shdr->sh_addr + shdr->sh_size < shdr->sh_addr) {
		pr_debug("ELF section address wraps around.\n");
		return false;
		}

		if (shdr->sh_type != SHT_NOBITS) {
		if (shdr->sh_offset + shdr->sh_size < shdr->sh_offset) {
		pr_debug("ELF section location wraps around.\n");
		return false;
		} else if (shdr->sh_offset + shdr->sh_size > buf_len) {
		pr_debug("ELF section not in file.\n");
		return false;
		}
		}

		return true;
		}

		static int elf_read_shdr(const char buf, size_t len, struct elf_info elf_info,
		int idx)
		{
		struct elf_shdr *shdr = &elf_info->sechdrs[idx];
		const struct elfhdr *ehdr = elf_info->ehdr;
		const char *sbuf;
		struct elf_shdr *buf_shdr;

		sbuf = buf + ehdr->e_shoff + idx * sizeof(*buf_shdr);
		buf_shdr = (struct elf_shdr *) sbuf;

		shdr->sh_name = elf32_to_cpu(ehdr, buf_shdr->sh_name);
		shdr->sh_type = elf32_to_cpu(ehdr, buf_shdr->sh_type);
		shdr->sh_addr = elf_addr_to_cpu(ehdr, buf_shdr->sh_addr);
		shdr->sh_offset = elf_addr_to_cpu(ehdr, buf_shdr->sh_offset);
		shdr->sh_link = elf32_to_cpu(ehdr, buf_shdr->sh_link);
		shdr->sh_info = elf32_to_cpu(ehdr, buf_shdr->sh_info);

		/*
		* The following fields have a type equivalent to Elf_Addr
		* both in 32 bit and 64 bit ELF.
		*/
		shdr->sh_flags = elf_addr_to_cpu(ehdr, buf_shdr->sh_flags);
		shdr->sh_size = elf_addr_to_cpu(ehdr, buf_shdr->sh_size);
		shdr->sh_addralign = elf_addr_to_cpu(ehdr, buf_shdr->sh_addralign);
		shdr->sh_entsize = elf_addr_to_cpu(ehdr, buf_shdr->sh_entsize);

		return elf_is_shdr_sane(shdr, len) ? 0 : -ENOEXEC;
		}

		/**
		* elf_read_shdrs - read the section headers from the buffer
		*
		* This function assumes that the section header table was checked for sanity.
		* Use elf_is_ehdr_sane() if it wasn't.
		*/
		static int elf_read_shdrs(const char *buf, size_t len,
		struct elf_info *elf_info)
		{
		size_t shdr_size, i;

		/*
		* e_shnum is at most 65536 so calculating
		* the size of the section header cannot overflow.
		*/
		shdr_size = sizeof(struct elf_shdr) * elf_info->ehdr->e_shnum;

		elf_info->sechdrs = kzalloc(shdr_size, GFP_KERNEL);
		if (!elf_info->sechdrs)
		return -ENOMEM;

		for (i = 0; i < elf_info->ehdr->e_shnum; i++) {
		int ret;

		ret = elf_read_shdr(buf, len, elf_info, i);
		if (ret) {
		kfree(elf_info->sechdrs);
		elf_info->sechdrs = NULL;
		return ret;
		}
		}

		return 0;
		}

		/**
		* elf_read_from_buffer - read ELF file and sets up ELF header and ELF info
		* @buf: Buffer to read ELF file from.
		* @len: Size of @buf.
		* @ehdr: Pointer to existing struct which will be populated.
		* @elf_info: Pointer to existing struct which will be populated.
		*
		* This function allows reading ELF files with different byte order than
		* the kernel, byte-swapping the fields as needed.
		*
		* Return:
		* On success returns 0, and the caller should call elf_free_info(elf_info) to
		* free the memory allocated for the section and program headers.
		*/
		int elf_read_from_buffer(const char buf, size_t len, struct elfhdr ehdr,
		struct elf_info *elf_info)
		{
		int ret;

		ret = elf_read_ehdr(buf, len, ehdr);
		if (ret)
		return ret;

		elf_info->buffer = buf;
		elf_info->ehdr = ehdr;
		if (ehdr->e_phoff > 0 && ehdr->e_phnum > 0) {
		ret = elf_read_phdrs(buf, len, elf_info);
		if (ret)
		return ret;
		}
		if (ehdr->e_shoff > 0 && ehdr->e_shnum > 0) {
		ret = elf_read_shdrs(buf, len, elf_info);
		if (ret) {
		kfree(elf_info->proghdrs);
		return ret;
		}
		}

		return 0;
		}

		/**
		* elf_free_info - free memory allocated by elf_read_from_buffer
		*/
		void elf_free_info(struct elf_info *elf_info)
		{
		kfree(elf_info->proghdrs);
		kfree(elf_info->sechdrs);
		memset(elf_info, 0, sizeof(*elf_info));
		}
		/**
		* build_elf_exec_info - read ELF executable and check that we can use it
		*/
		static int build_elf_exec_info(const char buf, size_t len, struct elfhdr ehdr,
		struct elf_info *elf_info)
		{
		int i;
		int ret;

		ret = elf_read_from_buffer(buf, len, ehdr, elf_info);
		if (ret)
		return ret;

		/* Big endian vmlinux has type ET_DYN. */
		if (ehdr->e_type != ET_EXEC && ehdr->e_type != ET_DYN) {
		pr_err("Not an ELF executable.\n");
		goto error;
		} else if (!elf_info->proghdrs) {
		pr_err("No ELF program header.\n");
		goto error;
		}

		for (i = 0; i < ehdr->e_phnum; i++) {
		/*
		* Kexec does not support loading interpreters.
		* In addition this check keeps us from attempting
		* to kexec ordinay executables.
		*/
		if (elf_info->proghdrs[i].p_type == PT_INTERP) {
		pr_err("Requires an ELF interpreter.\n");
		goto error;
		}
		}

		return 0;
		error:
		elf_free_info(elf_info);
		return -ENOEXEC;
		}

		static int elf64_probe(const char *buf, unsigned long len)
		{
		struct elfhdr ehdr;
		struct elf_info elf_info;
		int ret;

		ret = build_elf_exec_info(buf, len, &ehdr, &elf_info);
		if (ret)
		return ret;

		elf_free_info(&elf_info);

		return elf_check_arch(&ehdr) ? 0 : -ENOEXEC;
		}

		/**
		* elf_exec_load - load ELF executable image
		* @lowest_load_addr: On return, will be the address where the first PT_LOAD
		* section will be loaded in memory.
		*
		* Return:
		* 0 on success, negative value on failure.
		*/
		static int elf_exec_load(struct kimage image, struct elfhdr ehdr,
		struct elf_info *elf_info,
		unsigned long *lowest_load_addr)
		{
		unsigned long base = 0, lowest_addr = UINT_MAX;
		int ret;
		size_t i;
		struct kexec_buf kbuf = { .image = image, .buf_max = ppc64_rma_size,
		.top_down = false };

		/* Read in the PT_LOAD segments. */
		for (i = 0; i < ehdr->e_phnum; i++) {
		unsigned long load_addr;
		size_t size;
		const struct elf_phdr *phdr;

		phdr = &elf_info->proghdrs[i];
		if (phdr->p_type != PT_LOAD)
		continue;

		size = phdr->p_filesz;
		if (size > phdr->p_memsz)
		size = phdr->p_memsz;

		kbuf.buffer = (void *) elf_info->buffer + phdr->p_offset;
		kbuf.bufsz = size;
		kbuf.memsz = phdr->p_memsz;
		kbuf.buf_align = phdr->p_align;
		kbuf.buf_min = phdr->p_paddr + base;
		ret = kexec_add_buffer(&kbuf);
		if (ret)
		goto out;
		load_addr = kbuf.mem;

		if (load_addr < lowest_addr)
		lowest_addr = load_addr;
		}

		/* Update entry point to reflect new load address. */
		ehdr->e_entry += base;

		*lowest_load_addr = lowest_addr;
		ret = 0;
		out:
		return ret;
		}

		static void elf64_load(struct kimage image, char *kernel_buf,
		unsigned long kernel_len, char *initrd,
		unsigned long initrd_len, char *cmdline,
		unsigned long cmdline_len)
		{
		int ret;
		unsigned int fdt_size;
		unsigned long kernel_load_addr, purgatory_load_addr;
		unsigned long initrd_load_addr = 0, fdt_load_addr;
		void *fdt;
		const void *slave_code;
		struct elfhdr ehdr;
		struct elf_info elf_info;
		struct kexec_buf kbuf = { .image = image, .buf_min = 0,
		.buf_max = ppc64_rma_size };

		ret = build_elf_exec_info(kernel_buf, kernel_len, &ehdr, &elf_info);
		if (ret)
		goto out;

		ret = elf_exec_load(image, &ehdr, &elf_info, &kernel_load_addr);
		if (ret)
		goto out;

		pr_debug("Loaded the kernel at 0x%lx\n", kernel_load_addr);

		ret = kexec_load_purgatory(image, 0, ppc64_rma_size, true,
		&purgatory_load_addr);
		if (ret) {
		pr_err("Loading purgatory failed.\n");
		goto out;
		}

		pr_debug("Loaded purgatory at 0x%lx\n", purgatory_load_addr);

		if (initrd != NULL) {
		kbuf.buffer = initrd;
		kbuf.bufsz = kbuf.memsz = initrd_len;
		kbuf.buf_align = PAGE_SIZE;
		kbuf.top_down = false;
		ret = kexec_add_buffer(&kbuf);
		if (ret)
		goto out;
		initrd_load_addr = kbuf.mem;

		pr_debug("Loaded initrd at 0x%lx\n", initrd_load_addr);
		}

		fdt_size = fdt_totalsize(initial_boot_params) * 2;
		fdt = kmalloc(fdt_size, GFP_KERNEL);
		if (!fdt) {
		pr_err("Not enough memory for the device tree.\n");
		ret = -ENOMEM;
		goto out;
		}
		ret = fdt_open_into(initial_boot_params, fdt, fdt_size);
		if (ret < 0) {
		pr_err("Error setting up the new device tree.\n");
		ret = -EINVAL;
		goto out;
		}

		ret = setup_new_fdt(fdt, initrd_load_addr, initrd_len, cmdline);
		if (ret)
		goto out;

		fdt_pack(fdt);

		kbuf.buffer = fdt;
		kbuf.bufsz = kbuf.memsz = fdt_size;
		kbuf.buf_align = PAGE_SIZE;
		kbuf.top_down = true;
		ret = kexec_add_buffer(&kbuf);
		if (ret)
		goto out;
		fdt_load_addr = kbuf.mem;

		pr_debug("Loaded device tree at 0x%lx\n", fdt_load_addr);

		slave_code = elf_info.buffer + elf_info.proghdrs[0].p_offset;
		ret = setup_purgatory(image, slave_code, fdt, kernel_load_addr,
		fdt_load_addr);
		if (ret)
		pr_err("Error setting up the purgatory.\n");

		out:
		elf_free_info(&elf_info);

		/* Make kimage_file_post_load_cleanup free the fdt buffer for us. */
		return ret ? ERR_PTR(ret) : fdt;
		}

		struct kexec_file_ops kexec_elf64_ops = {
		.probe = elf64_probe,
		.load = elf64_load,
		};

arch/powerpc/kernel/machine_kexec_file_64.c

0 → 100644

+338 −0

File added.

Preview size limit exceeded, changes collapsed.

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