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-rw-r--r--arch/mips/mm/gup.c2
-rw-r--r--arch/powerpc/Kconfig3
-rw-r--r--arch/powerpc/include/asm/kexec.h2
-rw-r--r--arch/powerpc/kernel/kexec_elf_64.c11
-rw-r--r--arch/powerpc/kernel/machine_kexec_file_64.c39
-rw-r--r--arch/s390/mm/gup.c2
-rw-r--r--arch/sh/mm/gup.c2
-rw-r--r--arch/sparc/mm/gup.c4
-rw-r--r--arch/x86/Kconfig3
-rw-r--r--arch/x86/include/asm/kexec-bzimage64.h2
-rw-r--r--arch/x86/kernel/crash.c334
-rw-r--r--arch/x86/kernel/kexec-bzimage64.c10
-rw-r--r--arch/x86/kernel/machine_kexec_64.c111
-rw-r--r--arch/x86/purgatory/Makefile3
-rw-r--r--arch/x86/purgatory/purgatory.c2
-rw-r--r--arch/x86/purgatory/sha256.c283
-rw-r--r--arch/x86/purgatory/sha256.h21
-rw-r--r--arch/x86/purgatory/string.c12
18 files changed, 138 insertions, 708 deletions
diff --git a/arch/mips/mm/gup.c b/arch/mips/mm/gup.c
index 1e4658eee13f..5a4875cac1ec 100644
--- a/arch/mips/mm/gup.c
+++ b/arch/mips/mm/gup.c
@@ -178,6 +178,8 @@ static int gup_pud_range(pgd_t pgd, unsigned long addr, unsigned long end,
/*
* Like get_user_pages_fast() except its IRQ-safe in that it won't fall
* back to the regular GUP.
+ * Note a difference with get_user_pages_fast: this always returns the
+ * number of pages pinned, 0 if no pages were pinned.
*/
int __get_user_pages_fast(unsigned long start, int nr_pages, int write,
struct page **pages)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 73ce5dd07642..c32a181a7cbb 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -552,6 +552,9 @@ config KEXEC_FILE
for kernel and initramfs as opposed to a list of segments as is the
case for the older kexec call.
+config ARCH_HAS_KEXEC_PURGATORY
+ def_bool KEXEC_FILE
+
config RELOCATABLE
bool "Build a relocatable kernel"
depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE))
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
index d8b1e8e7e035..4a585cba1787 100644
--- a/arch/powerpc/include/asm/kexec.h
+++ b/arch/powerpc/include/asm/kexec.h
@@ -95,7 +95,7 @@ static inline bool kdump_in_progress(void)
}
#ifdef CONFIG_KEXEC_FILE
-extern struct kexec_file_ops kexec_elf64_ops;
+extern const struct kexec_file_ops kexec_elf64_ops;
#ifdef CONFIG_IMA_KEXEC
#define ARCH_HAS_KIMAGE_ARCH
diff --git a/arch/powerpc/kernel/kexec_elf_64.c b/arch/powerpc/kernel/kexec_elf_64.c
index 9a42309b091a..ba4f18a43ee8 100644
--- a/arch/powerpc/kernel/kexec_elf_64.c
+++ b/arch/powerpc/kernel/kexec_elf_64.c
@@ -572,7 +572,7 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
{
int ret;
unsigned int fdt_size;
- unsigned long kernel_load_addr, purgatory_load_addr;
+ unsigned long kernel_load_addr;
unsigned long initrd_load_addr = 0, fdt_load_addr;
void *fdt;
const void *slave_code;
@@ -580,6 +580,8 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
struct elf_info elf_info;
struct kexec_buf kbuf = { .image = image, .buf_min = 0,
.buf_max = ppc64_rma_size };
+ struct kexec_buf pbuf = { .image = image, .buf_min = 0,
+ .buf_max = ppc64_rma_size, .top_down = true };
ret = build_elf_exec_info(kernel_buf, kernel_len, &ehdr, &elf_info);
if (ret)
@@ -591,14 +593,13 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
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);
+ ret = kexec_load_purgatory(image, &pbuf);
if (ret) {
pr_err("Loading purgatory failed.\n");
goto out;
}
- pr_debug("Loaded purgatory at 0x%lx\n", purgatory_load_addr);
+ pr_debug("Loaded purgatory at 0x%lx\n", pbuf.mem);
if (initrd != NULL) {
kbuf.buffer = initrd;
@@ -657,7 +658,7 @@ out:
return ret ? ERR_PTR(ret) : fdt;
}
-struct kexec_file_ops kexec_elf64_ops = {
+const struct kexec_file_ops kexec_elf64_ops = {
.probe = elf64_probe,
.load = elf64_load,
};
diff --git a/arch/powerpc/kernel/machine_kexec_file_64.c b/arch/powerpc/kernel/machine_kexec_file_64.c
index 45e0b7d5f200..0bd23dc789a4 100644
--- a/arch/powerpc/kernel/machine_kexec_file_64.c
+++ b/arch/powerpc/kernel/machine_kexec_file_64.c
@@ -31,52 +31,19 @@
#define SLAVE_CODE_SIZE 256
-static struct kexec_file_ops *kexec_file_loaders[] = {
+const struct kexec_file_ops * const kexec_file_loaders[] = {
&kexec_elf64_ops,
+ NULL
};
int arch_kexec_kernel_image_probe(struct kimage *image, void *buf,
unsigned long buf_len)
{
- int i, ret = -ENOEXEC;
- struct kexec_file_ops *fops;
-
/* We don't support crash kernels yet. */
if (image->type == KEXEC_TYPE_CRASH)
return -EOPNOTSUPP;
- for (i = 0; i < ARRAY_SIZE(kexec_file_loaders); i++) {
- fops = kexec_file_loaders[i];
- if (!fops || !fops->probe)
- continue;
-
- ret = fops->probe(buf, buf_len);
- if (!ret) {
- image->fops = fops;
- return ret;
- }
- }
-
- return ret;
-}
-
-void *arch_kexec_kernel_image_load(struct kimage *image)
-{
- if (!image->fops || !image->fops->load)
- return ERR_PTR(-ENOEXEC);
-
- return image->fops->load(image, image->kernel_buf,
- image->kernel_buf_len, image->initrd_buf,
- image->initrd_buf_len, image->cmdline_buf,
- image->cmdline_buf_len);
-}
-
-int arch_kimage_file_post_load_cleanup(struct kimage *image)
-{
- if (!image->fops || !image->fops->cleanup)
- return 0;
-
- return image->fops->cleanup(image->image_loader_data);
+ return kexec_image_probe_default(image, buf, buf_len);
}
/**
diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c
index 05c8abd864f1..2809d11c7a28 100644
--- a/arch/s390/mm/gup.c
+++ b/arch/s390/mm/gup.c
@@ -220,6 +220,8 @@ static inline int gup_p4d_range(pgd_t *pgdp, pgd_t pgd, unsigned long addr,
/*
* Like get_user_pages_fast() except its IRQ-safe in that it won't fall
* back to the regular GUP.
+ * Note a difference with get_user_pages_fast: this always returns the
+ * number of pages pinned, 0 if no pages were pinned.
*/
int __get_user_pages_fast(unsigned long start, int nr_pages, int write,
struct page **pages)
diff --git a/arch/sh/mm/gup.c b/arch/sh/mm/gup.c
index 8045b5bb7075..56c86ca98ecf 100644
--- a/arch/sh/mm/gup.c
+++ b/arch/sh/mm/gup.c
@@ -160,6 +160,8 @@ static int gup_pud_range(pgd_t pgd, unsigned long addr, unsigned long end,
/*
* Like get_user_pages_fast() except its IRQ-safe in that it won't fall
* back to the regular GUP.
+ * Note a difference with get_user_pages_fast: this always returns the
+ * number of pages pinned, 0 if no pages were pinned.
*/
int __get_user_pages_fast(unsigned long start, int nr_pages, int write,
struct page **pages)
diff --git a/arch/sparc/mm/gup.c b/arch/sparc/mm/gup.c
index 357b6047653a..aee6dba83d0e 100644
--- a/arch/sparc/mm/gup.c
+++ b/arch/sparc/mm/gup.c
@@ -193,6 +193,10 @@ static int gup_pud_range(pgd_t pgd, unsigned long addr, unsigned long end,
return 1;
}
+/*
+ * Note a difference with get_user_pages_fast: this always returns the
+ * number of pages pinned, 0 if no pages were pinned.
+ */
int __get_user_pages_fast(unsigned long start, int nr_pages, int write,
struct page **pages)
{
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d234cca296db..7fe107f5990b 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2008,6 +2008,9 @@ config KEXEC_FILE
for kernel and initramfs as opposed to list of segments as
accepted by previous system call.
+config ARCH_HAS_KEXEC_PURGATORY
+ def_bool KEXEC_FILE
+
config KEXEC_VERIFY_SIG
bool "Verify kernel signature during kexec_file_load() syscall"
depends on KEXEC_FILE
diff --git a/arch/x86/include/asm/kexec-bzimage64.h b/arch/x86/include/asm/kexec-bzimage64.h
index 9f07cff43705..df89ee7d3e9e 100644
--- a/arch/x86/include/asm/kexec-bzimage64.h
+++ b/arch/x86/include/asm/kexec-bzimage64.h
@@ -2,6 +2,6 @@
#ifndef _ASM_KEXEC_BZIMAGE64_H
#define _ASM_KEXEC_BZIMAGE64_H
-extern struct kexec_file_ops kexec_bzImage64_ops;
+extern const struct kexec_file_ops kexec_bzImage64_ops;
#endif /* _ASM_KEXE_BZIMAGE64_H */
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 1f6680427ff0..f631a3f15587 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -38,37 +38,6 @@
#include <asm/virtext.h>
#include <asm/intel_pt.h>
-/* Alignment required for elf header segment */
-#define ELF_CORE_HEADER_ALIGN 4096
-
-/* This primarily represents number of split ranges due to exclusion */
-#define CRASH_MAX_RANGES 16
-
-struct crash_mem_range {
- u64 start, end;
-};
-
-struct crash_mem {
- unsigned int nr_ranges;
- struct crash_mem_range ranges[CRASH_MAX_RANGES];
-};
-
-/* Misc data about ram ranges needed to prepare elf headers */
-struct crash_elf_data {
- struct kimage *image;
- /*
- * Total number of ram ranges we have after various adjustments for
- * crash reserved region, etc.
- */
- unsigned int max_nr_ranges;
-
- /* Pointer to elf header */
- void *ehdr;
- /* Pointer to next phdr */
- void *bufp;
- struct crash_mem mem;
-};
-
/* Used while preparing memory map entries for second kernel */
struct crash_memmap_data {
struct boot_params *params;
@@ -218,124 +187,49 @@ static int get_nr_ram_ranges_callback(struct resource *res, void *arg)
return 0;
}
-
/* Gather all the required information to prepare elf headers for ram regions */
-static void fill_up_crash_elf_data(struct crash_elf_data *ced,
- struct kimage *image)
+static struct crash_mem *fill_up_crash_elf_data(void)
{
unsigned int nr_ranges = 0;
-
- ced->image = image;
+ struct crash_mem *cmem;
walk_system_ram_res(0, -1, &nr_ranges,
get_nr_ram_ranges_callback);
+ if (!nr_ranges)
+ return NULL;
- ced->max_nr_ranges = nr_ranges;
-
- /* Exclusion of crash region could split memory ranges */
- ced->max_nr_ranges++;
-
- /* If crashk_low_res is not 0, another range split possible */
- if (crashk_low_res.end)
- ced->max_nr_ranges++;
-}
-
-static int exclude_mem_range(struct crash_mem *mem,
- unsigned long long mstart, unsigned long long mend)
-{
- int i, j;
- unsigned long long start, end;
- struct crash_mem_range temp_range = {0, 0};
-
- for (i = 0; i < mem->nr_ranges; i++) {
- start = mem->ranges[i].start;
- end = mem->ranges[i].end;
-
- if (mstart > end || mend < start)
- continue;
-
- /* Truncate any area outside of range */
- if (mstart < start)
- mstart = start;
- if (mend > end)
- mend = end;
-
- /* Found completely overlapping range */
- if (mstart == start && mend == end) {
- mem->ranges[i].start = 0;
- mem->ranges[i].end = 0;
- if (i < mem->nr_ranges - 1) {
- /* Shift rest of the ranges to left */
- for (j = i; j < mem->nr_ranges - 1; j++) {
- mem->ranges[j].start =
- mem->ranges[j+1].start;
- mem->ranges[j].end =
- mem->ranges[j+1].end;
- }
- }
- mem->nr_ranges--;
- return 0;
- }
-
- if (mstart > start && mend < end) {
- /* Split original range */
- mem->ranges[i].end = mstart - 1;
- temp_range.start = mend + 1;
- temp_range.end = end;
- } else if (mstart != start)
- mem->ranges[i].end = mstart - 1;
- else
- mem->ranges[i].start = mend + 1;
- break;
- }
+ /*
+ * Exclusion of crash region and/or crashk_low_res may cause
+ * another range split. So add extra two slots here.
+ */
+ nr_ranges += 2;
+ cmem = vzalloc(sizeof(struct crash_mem) +
+ sizeof(struct crash_mem_range) * nr_ranges);
+ if (!cmem)
+ return NULL;
- /* If a split happend, add the split to array */
- if (!temp_range.end)
- return 0;
+ cmem->max_nr_ranges = nr_ranges;
+ cmem->nr_ranges = 0;
- /* Split happened */
- if (i == CRASH_MAX_RANGES - 1) {
- pr_err("Too many crash ranges after split\n");
- return -ENOMEM;
- }
-
- /* Location where new range should go */
- j = i + 1;
- if (j < mem->nr_ranges) {
- /* Move over all ranges one slot towards the end */
- for (i = mem->nr_ranges - 1; i >= j; i--)
- mem->ranges[i + 1] = mem->ranges[i];
- }
-
- mem->ranges[j].start = temp_range.start;
- mem->ranges[j].end = temp_range.end;
- mem->nr_ranges++;
- return 0;
+ return cmem;
}
/*
* Look for any unwanted ranges between mstart, mend and remove them. This
- * might lead to split and split ranges are put in ced->mem.ranges[] array
+ * might lead to split and split ranges are put in cmem->ranges[] array
*/
-static int elf_header_exclude_ranges(struct crash_elf_data *ced,
- unsigned long long mstart, unsigned long long mend)
+static int elf_header_exclude_ranges(struct crash_mem *cmem)
{
- struct crash_mem *cmem = &ced->mem;
int ret = 0;
- memset(cmem->ranges, 0, sizeof(cmem->ranges));
-
- cmem->ranges[0].start = mstart;
- cmem->ranges[0].end = mend;
- cmem->nr_ranges = 1;
-
/* Exclude crashkernel region */
- ret = exclude_mem_range(cmem, crashk_res.start, crashk_res.end);
+ ret = crash_exclude_mem_range(cmem, crashk_res.start, crashk_res.end);
if (ret)
return ret;
if (crashk_low_res.end) {
- ret = exclude_mem_range(cmem, crashk_low_res.start, crashk_low_res.end);
+ ret = crash_exclude_mem_range(cmem, crashk_low_res.start,
+ crashk_low_res.end);
if (ret)
return ret;
}
@@ -345,144 +239,12 @@ static int elf_header_exclude_ranges(struct crash_elf_data *ced,
static int prepare_elf64_ram_headers_callback(struct resource *res, void *arg)
{
- struct crash_elf_data *ced = arg;
- Elf64_Ehdr *ehdr;
- Elf64_Phdr *phdr;
- unsigned long mstart, mend;
- struct kimage *image = ced->image;
- struct crash_mem *cmem;
- int ret, i;
-
- ehdr = ced->ehdr;
-
- /* Exclude unwanted mem ranges */
- ret = elf_header_exclude_ranges(ced, res->start, res->end);
- if (ret)
- return ret;
-
- /* Go through all the ranges in ced->mem.ranges[] and prepare phdr */
- cmem = &ced->mem;
-
- for (i = 0; i < cmem->nr_ranges; i++) {
- mstart = cmem->ranges[i].start;
- mend = cmem->ranges[i].end;
-
- phdr = ced->bufp;
- ced->bufp += sizeof(Elf64_Phdr);
-
- phdr->p_type = PT_LOAD;
- phdr->p_flags = PF_R|PF_W|PF_X;
- phdr->p_offset = mstart;
-
- /*
- * If a range matches backup region, adjust offset to backup
- * segment.
- */
- if (mstart == image->arch.backup_src_start &&
- (mend - mstart + 1) == image->arch.backup_src_sz)
- phdr->p_offset = image->arch.backup_load_addr;
-
- phdr->p_paddr = mstart;
- phdr->p_vaddr = (unsigned long long) __va(mstart);
- phdr->p_filesz = phdr->p_memsz = mend - mstart + 1;
- phdr->p_align = 0;
- ehdr->e_phnum++;
- pr_debug("Crash PT_LOAD elf header. phdr=%p vaddr=0x%llx, paddr=0x%llx, sz=0x%llx e_phnum=%d p_offset=0x%llx\n",
- phdr, phdr->p_vaddr, phdr->p_paddr, phdr->p_filesz,
- ehdr->e_phnum, phdr->p_offset);
- }
-
- return ret;
-}
-
-static int prepare_elf64_headers(struct crash_elf_data *ced,
- void **addr, unsigned long *sz)
-{
- Elf64_Ehdr *ehdr;
- Elf64_Phdr *phdr;
- unsigned long nr_cpus = num_possible_cpus(), nr_phdr, elf_sz;
- unsigned char *buf, *bufp;
- unsigned int cpu;
- unsigned long long notes_addr;
- int ret;
+ struct crash_mem *cmem = arg;
- /* extra phdr for vmcoreinfo elf note */
- nr_phdr = nr_cpus + 1;
- nr_phdr += ced->max_nr_ranges;
-
- /*
- * kexec-tools creates an extra PT_LOAD phdr for kernel text mapping
- * area on x86_64 (ffffffff80000000 - ffffffffa0000000).
- * I think this is required by tools like gdb. So same physical
- * memory will be mapped in two elf headers. One will contain kernel
- * text virtual addresses and other will have __va(physical) addresses.
- */
+ cmem->ranges[cmem->nr_ranges].start = res->start;
+ cmem->ranges[cmem->nr_ranges].end = res->end;
+ cmem->nr_ranges++;
- nr_phdr++;
- elf_sz = sizeof(Elf64_Ehdr) + nr_phdr * sizeof(Elf64_Phdr);
- elf_sz = ALIGN(elf_sz, ELF_CORE_HEADER_ALIGN);
-
- buf = vzalloc(elf_sz);
- if (!buf)
- return -ENOMEM;
-
- bufp = buf;
- ehdr = (Elf64_Ehdr *)bufp;
- bufp += sizeof(Elf64_Ehdr);
- memcpy(ehdr->e_ident, ELFMAG, SELFMAG);
- ehdr->e_ident[EI_CLASS] = ELFCLASS64;
- ehdr->e_ident[EI_DATA] = ELFDATA2LSB;
- ehdr->e_ident[EI_VERSION] = EV_CURRENT;
- ehdr->e_ident[EI_OSABI] = ELF_OSABI;
- memset(ehdr->e_ident + EI_PAD, 0, EI_NIDENT - EI_PAD);
- ehdr->e_type = ET_CORE;
- ehdr->e_machine = ELF_ARCH;
- ehdr->e_version = EV_CURRENT;
- ehdr->e_phoff = sizeof(Elf64_Ehdr);
- ehdr->e_ehsize = sizeof(Elf64_Ehdr);
- ehdr->e_phentsize = sizeof(Elf64_Phdr);
-
- /* Prepare one phdr of type PT_NOTE for each present cpu */
- for_each_present_cpu(cpu) {
- phdr = (Elf64_Phdr *)bufp;
- bufp += sizeof(Elf64_Phdr);
- phdr->p_type = PT_NOTE;
- notes_addr = per_cpu_ptr_to_phys(per_cpu_ptr(crash_notes, cpu));
- phdr->p_offset = phdr->p_paddr = notes_addr;
- phdr->p_filesz = phdr->p_memsz = sizeof(note_buf_t);
- (ehdr->e_phnum)++;
- }
-
- /* Prepare one PT_NOTE header for vmcoreinfo */
- phdr = (Elf64_Phdr *)bufp;
- bufp += sizeof(Elf64_Phdr);
- phdr->p_type = PT_NOTE;
- phdr->p_offset = phdr->p_paddr = paddr_vmcoreinfo_note();
- phdr->p_filesz = phdr->p_memsz = VMCOREINFO_NOTE_SIZE;
- (ehdr->e_phnum)++;
-
-#ifdef CONFIG_X86_64
- /* Prepare PT_LOAD type program header for kernel text region */
- phdr = (Elf64_Phdr *)bufp;
- bufp += sizeof(Elf64_Phdr);
- phdr->p_type = PT_LOAD;
- phdr->p_flags = PF_R|PF_W|PF_X;
- phdr->p_vaddr = (Elf64_Addr)_text;
- phdr->p_filesz = phdr->p_memsz = _end - _text;
- phdr->p_offset = phdr->p_paddr = __pa_symbol(_text);
- (ehdr->e_phnum)++;
-#endif
-
- /* Prepare PT_LOAD headers for system ram chunks. */
- ced->ehdr = ehdr;
- ced->bufp = bufp;
- ret = walk_system_ram_res(0, -1, ced,
- prepare_elf64_ram_headers_callback);
- if (ret < 0)
- return ret;
-
- *addr = buf;
- *sz = elf_sz;
return 0;
}
@@ -490,18 +252,46 @@ static int prepare_elf64_headers(struct crash_elf_data *ced,
static int prepare_elf_headers(struct kimage *image, void **addr,
unsigned long *sz)
{
- struct crash_elf_data *ced;
- int ret;
+ struct crash_mem *cmem;
+ Elf64_Ehdr *ehdr;
+ Elf64_Phdr *phdr;
+ int ret, i;
- ced = kzalloc(sizeof(*ced), GFP_KERNEL);
- if (!ced)
+ cmem = fill_up_crash_elf_data();
+ if (!cmem)
return -ENOMEM;
- fill_up_crash_elf_data(ced, image);
+ ret = walk_system_ram_res(0, -1, cmem,
+ prepare_elf64_ram_headers_callback);
+ if (ret)
+ goto out;
+
+ /* Exclude unwanted mem ranges */
+ ret = elf_header_exclude_ranges(cmem);
+ if (ret)
+ goto out;
/* By default prepare 64bit headers */
- ret = prepare_elf64_headers(ced, addr, sz);
- kfree(ced);
+ ret = crash_prepare_elf64_headers(cmem,
+ IS_ENABLED(CONFIG_X86_64), addr, sz);
+ if (ret)
+ goto out;
+
+ /*
+ * If a range matches backup region, adjust offset to backup
+ * segment.
+ */
+ ehdr = (Elf64_Ehdr *)*addr;
+ phdr = (Elf64_Phdr *)(ehdr + 1);
+ for (i = 0; i < ehdr->e_phnum; phdr++, i++)
+ if (phdr->p_type == PT_LOAD &&
+ phdr->p_paddr == image->arch.backup_src_start &&
+ phdr->p_memsz == image->arch.backup_src_sz) {
+ phdr->p_offset = image->arch.backup_load_addr;
+ break;
+ }
+out:
+ vfree(cmem);
return ret;
}
@@ -547,14 +337,14 @@ static int memmap_exclude_ranges(struct kimage *image, struct crash_mem *cmem,
/* Exclude Backup region */
start = image->arch.backup_load_addr;
end = start + image->arch.backup_src_sz - 1;
- ret = exclude_mem_range(cmem, start, end);
+ ret = crash_exclude_mem_range(cmem, start, end);
if (ret)
return ret;
/* Exclude elf header region */
start = image->arch.elf_load_addr;
end = start + image->arch.elf_headers_sz - 1;
- return exclude_mem_range(cmem, start, end);
+ return crash_exclude_mem_range(cmem, start, end);
}
/* Prepare memory map for crash dump kernel */
diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c
index fb095ba0c02f..3182908b7e6c 100644
--- a/arch/x86/kernel/kexec-bzimage64.c
+++ b/arch/x86/kernel/kexec-bzimage64.c
@@ -334,7 +334,6 @@ static void *bzImage64_load(struct kimage *image, char *kernel,
unsigned long setup_header_size, params_cmdline_sz;
struct boot_params *params;
unsigned long bootparam_load_addr, kernel_load_addr, initrd_load_addr;
- unsigned long purgatory_load_addr;
struct bzimage64_data *ldata;
struct kexec_entry64_regs regs64;
void *stack;
@@ -342,6 +341,8 @@ static void *bzImage64_load(struct kimage *image, char *kernel,
unsigned int efi_map_offset, efi_map_sz, efi_setup_data_offset;
struct kexec_buf kbuf = { .image = image, .buf_max = ULONG_MAX,
.top_down = true };
+ struct kexec_buf pbuf = { .image = image, .buf_min = MIN_PURGATORY_ADDR,
+ .buf_max = ULONG_MAX, .top_down = true };
header = (struct setup_header *)(kernel + setup_hdr_offset);
setup_sects = header->setup_sects;
@@ -379,14 +380,13 @@ static void *bzImage64_load(struct kimage *image, char *kernel,
* Load purgatory. For 64bit entry point, purgatory code can be
* anywhere.
*/
- ret = kexec_load_purgatory(image, MIN_PURGATORY_ADDR, ULONG_MAX, 1,
- &purgatory_load_addr);
+ ret = kexec_load_purgatory(image, &pbuf);
if (ret) {
pr_err("Loading purgatory failed\n");
return ERR_PTR(ret);
}
- pr_debug("Loaded purgatory at 0x%lx\n", purgatory_load_addr);
+ pr_debug("Loaded purgatory at 0x%lx\n", pbuf.mem);
/*
@@ -538,7 +538,7 @@ static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len)
}
#endif
-struct kexec_file_ops kexec_bzImage64_ops = {
+const struct kexec_file_ops kexec_bzImage64_ops = {
.probe = bzImage64_probe,
.load = bzImage64_load,
.cleanup = bzImage64_cleanup,
diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index 93bd4fb603d1..a5e55d832d0a 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -30,8 +30,9 @@
#include <asm/set_memory.h>
#ifdef CONFIG_KEXEC_FILE
-static struct kexec_file_ops *kexec_file_loaders[] = {
+const struct kexec_file_ops * const kexec_file_loaders[] = {
&kexec_bzImage64_ops,
+ NULL
};
#endif
@@ -364,27 +365,6 @@ void arch_crash_save_vmcoreinfo(void)
/* arch-dependent functionality related to kexec file-based syscall */
#ifdef CONFIG_KEXEC_FILE
-int arch_kexec_kernel_image_probe(struct kimage *image, void *buf,
- unsigned long buf_len)
-{
- int i, ret = -ENOEXEC;
- struct kexec_file_ops *fops;
-
- for (i = 0; i < ARRAY_SIZE(kexec_file_loaders); i++) {
- fops = kexec_file_loaders[i];
- if (!fops || !fops->probe)
- continue;
-
- ret = fops->probe(buf, buf_len);
- if (!ret) {
- image->fops = fops;
- return ret;
- }
- }
-
- return ret;
-}
-
void *arch_kexec_kernel_image_load(struct kimage *image)
{
vfree(image->arch.elf_headers);
@@ -399,88 +379,53 @@ void *arch_kexec_kernel_image_load(struct kimage *image)
image->cmdline_buf_len);
}
-int arch_kimage_file_post_load_cleanup(struct kimage *image)
-{
- if (!image->fops || !image->fops->cleanup)
- return 0;
-
- return image->fops->cleanup(image->image_loader_data);
-}
-
-#ifdef CONFIG_KEXEC_VERIFY_SIG
-int arch_kexec_kernel_verify_sig(struct kimage *image, void *kernel,
- unsigned long kernel_len)
-{
- if (!image->fops || !image->fops->verify_sig) {
- pr_debug("kernel loader does not support signature verification.");
- return -EKEYREJECTED;
- }
-
- return image->fops->verify_sig(kernel, kernel_len);
-}
-#endif
-
/*
* Apply purgatory relocations.
*
- * ehdr: Pointer to elf headers
- * sechdrs: Pointer to section headers.
- * relsec: section index of SHT_RELA section.
+ * @pi: Purgatory to be relocated.
+ * @section: Section relocations applying to.
+ * @relsec: Section containing RELAs.
+ * @symtabsec: Corresponding symtab.
*
* TODO: Some of the code belongs to generic code. Move that in kexec.c.
*/
-int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
- Elf64_Shdr *sechdrs, unsigned int relsec)
+int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
+ Elf_Shdr *section, const Elf_Shdr *relsec,
+ const Elf_Shdr *symtabsec)
{
unsigned int i;
Elf64_Rela *rel;
Elf64_Sym *sym;
void *location;
- Elf64_Shdr *section, *symtabsec;
unsigned long address, sec_base, value;
const char *strtab, *name, *shstrtab;
+ const Elf_Shdr *sechdrs;
- /*
- * ->sh_offset has been modified to keep the pointer to section
- * contents in memory
- */
- rel = (void *)sechdrs[relsec].sh_offset;
-
- /* Section to which relocations apply */
- section = &sechdrs[sechdrs[relsec].sh_info];
-
- pr_debug("Applying relocate section %u to %u\n", relsec,
- sechdrs[relsec].sh_info);
-
- /* Associated symbol table */
- symtabsec = &sechdrs[sechdrs[relsec].sh_link];
-
- /* String table */
- if (symtabsec->sh_link >= ehdr->e_shnum) {
- /* Invalid strtab section number */
- pr_err("Invalid string table section index %d\n",
- symtabsec->sh_link);
- return -ENOEXEC;
- }
+ /* String & section header string table */
+ sechdrs = (void *)pi->ehdr + pi->ehdr->e_shoff;
+ strtab = (char *)pi->ehdr + sechdrs[symtabsec->sh_link].sh_offset;
+ shstrtab = (char *)pi->ehdr + sechdrs[pi->ehdr->e_shstrndx].sh_offset;
- strtab = (char *)sechdrs[symtabsec->sh_link].sh_offset;
+ rel = (void *)pi->ehdr + relsec->sh_offset;
- /* section header string table */
- shstrtab = (char *)sechdrs[ehdr->e_shstrndx].sh_offset;
+ pr_debug("Applying relocate section %s to %u\n",
+ shstrtab + relsec->sh_name, relsec->sh_info);
- for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+ for (i = 0; i < relsec->sh_size / sizeof(*rel); i++) {
/*
* rel[i].r_offset contains byte offset from beginning
* of section to the storage unit affected.
*
- * This is location to update (->sh_offset). This is temporary
- * buffer where section is currently loaded. This will finally
- * be loaded to a different address later, pointed to by
+ * This is location to update. This is temporary buffer
+ * where section is currently loaded. This will finally be
+ * loaded to a different address later, pointed to by
* ->sh_addr. kexec takes care of moving it
* (kexec_load_segment()).
*/
- location = (void *)(section->sh_offset + rel[i].r_offset);
+ location = pi->purgatory_buf;
+ location += section->sh_offset;
+ location += rel[i].r_offset;
/* Final address of the location */
address = section->sh_addr + rel[i].r_offset;
@@ -491,8 +436,8 @@ int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
* to apply. ELF64_R_SYM() and ELF64_R_TYPE() macros get
* these respectively.
*/
- sym = (Elf64_Sym *)symtabsec->sh_offset +
- ELF64_R_SYM(rel[i].r_info);
+ sym = (void *)pi->ehdr + symtabsec->sh_offset;
+ sym += ELF64_R_SYM(rel[i].r_info);
if (sym->st_name)
name = strtab + sym->st_name;
@@ -515,12 +460,12 @@ int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
if (sym->st_shndx == SHN_ABS)
sec_base = 0;
- else if (sym->st_shndx >= ehdr->e_shnum) {
+ else if (sym->st_shndx >= pi->ehdr->e_shnum) {
pr_err("Invalid section %d for symbol %s\n",
sym->st_shndx, name);
return -ENOEXEC;
} else
- sec_base = sechdrs[sym->st_shndx].sh_addr;
+ sec_base = pi->sechdrs[sym->st_shndx].sh_addr;
value = sym->st_value;
value += sec_base;
diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile
index d70c15de417b..2e9ee023e6bc 100644
--- a/arch/x86/purgatory/Makefile
+++ b/arch/x86/purgatory/Makefile
@@ -6,6 +6,9 @@ purgatory-y := purgatory.o stack.o setup-x86_$(BITS).o sha256.o entry64.o string
targets += $(purgatory-y)
PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
+$(obj)/sha256.o: $(srctree)/lib/sha256.c
+ $(call if_changed_rule,cc_o_c)
+
LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib -z nodefaultlib
targets += purgatory.ro
diff --git a/arch/x86/purgatory/purgatory.c b/arch/x86/purgatory/purgatory.c
index 470edad96bb9..025c34ac0d84 100644
--- a/arch/x86/purgatory/purgatory.c
+++ b/arch/x86/purgatory/purgatory.c
@@ -11,9 +11,9 @@
*/
#include <linux/bug.h>
+#include <linux/sha256.h>
#include <asm/purgatory.h>
-#include "sha256.h"
#include "../boot/string.h"
unsigned long purgatory_backup_dest __section(.kexec-purgatory);
diff --git a/arch/x86/purgatory/sha256.c b/arch/x86/purgatory/sha256.c
deleted file mode 100644
index 548ca675a14a..000000000000
--- a/arch/x86/purgatory/sha256.c
+++ /dev/null
@@ -1,283 +0,0 @@
-/*
- * SHA-256, as specified in
- * http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
- *
- * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
- *
- * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
- * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
- * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
- * Copyright (c) 2014 Red Hat Inc.
- *
- * 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; either version 2 of the License, or (at your option)
- * any later version.
- */
-
-#include <linux/bitops.h>
-#include <asm/byteorder.h>
-#include "sha256.h"
-#include "../boot/string.h"
-
-static inline u32 Ch(u32 x, u32 y, u32 z)
-{
- return z ^ (x & (y ^ z));
-}
-
-static inline u32 Maj(u32 x, u32 y, u32 z)
-{
- return (x & y) | (z & (x | y));
-}
-
-#define e0(x) (ror32(x, 2) ^ ror32(x, 13) ^ ror32(x, 22))
-#define e1(x) (ror32(x, 6) ^ ror32(x, 11) ^ ror32(x, 25))
-#define s0(x) (ror32(x, 7) ^ ror32(x, 18) ^ (x >> 3))
-#define s1(x) (ror32(x, 17) ^ ror32(x, 19) ^ (x >> 10))
-
-static inline void LOAD_OP(int I, u32 *W, const u8 *input)
-{
- W[I] = __be32_to_cpu(((__be32 *)(input))[I]);
-}
-
-static inline void BLEND_OP(int I, u32 *W)
-{
- W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
-}
-
-static void sha256_transform(u32 *state, const u8 *input)
-{
- u32 a, b, c, d, e, f, g, h, t1, t2;
- u32 W[64];
- int i;
-
- /* load the input */
- for (i = 0; i < 16; i++)
- LOAD_OP(i, W, input);
-
- /* now blend */
- for (i = 16; i < 64; i++)
- BLEND_OP(i, W);
-
- /* load the state into our registers */
- a = state[0]; b = state[1]; c = state[2]; d = state[3];
- e = state[4]; f = state[5]; g = state[6]; h = state[7];
-
- /* now iterate */
- t1 = h + e1(e) + Ch(e, f, g) + 0x428a2f98 + W[0];
- t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2;
- t1 = g + e1(d) + Ch(d, e, f) + 0x71374491 + W[1];
- t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2;
- t1 = f + e1(c) + Ch(c, d, e) + 0xb5c0fbcf + W[2];
- t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2;
- t1 = e + e1(b) + Ch(b, c, d) + 0xe9b5dba5 + W[3];
- t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2;
- t1 = d + e1(a) + Ch(a, b, c) + 0x3956c25b + W[4];
- t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2;
- t1 = c + e1(h) + Ch(h, a, b) + 0x59f111f1 + W[5];
- t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2;
- t1 = b + e1(g) + Ch(g, h, a) + 0x923f82a4 + W[6];
- t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2;
- t1 = a + e1(f) + Ch(f, g, h) + 0xab1c5ed5 + W[7];
- t2 = e0(b) + Maj(b, c, d); e += t1; a = t1 + t2;
-
- t1 = h + e1(e) + Ch(e, f, g) + 0xd807aa98 + W[8];
- t2 = e0(a) + Maj(a, b, c); d += t1; h = t1 + t2;
- t1 = g + e1(d) + Ch(d, e, f) + 0x12835b01 + W[9];
- t2 = e0(h) + Maj(h, a, b); c += t1; g = t1 + t2;
- t1 = f + e1(c) + Ch(c, d, e) + 0x243185be + W[10];
- t2 = e0(g) + Maj(g, h, a); b += t1; f = t1 + t2;
- t1 = e + e1(b) + Ch(b, c, d) + 0x550c7dc3 + W[11];
- t2 = e0(f) + Maj(f, g, h); a += t1; e = t1 + t2;
- t1 = d + e1(a) + Ch(a, b, c) + 0x72be5d74 + W[12];
- t2 = e0(e) + Maj(e, f, g); h += t1; d = t1 + t2;
- t1 = c + e1(h) + Ch(h, a, b) + 0x80deb1fe + W[13];
- t2 = e0(d) + Maj(d, e, f); g += t1; c = t1 + t2;
- t1 = b + e1(g) + Ch(g, h, a) + 0x9bdc06a7 + W[14];
- t2 = e0(c) + Maj(c, d, e); f += t1; b = t1 + t2;
- t1 = a + e1(f) + Ch(f, g, h) + 0xc19bf174 + W[15];
- t2 = e0(b) + Maj(b, c, d); e += t1; a = t1+t2;
-
- t1 = h + e1(e) + Ch(e, f, g) + 0xe49b69c1 + W[16];
- t2 = e0(a) + Maj(a, b, c); d += t1; h = t1+t2;
- t1 = g + e1(d) + Ch(d, e, f) + 0xefbe4786 + W[17];
- t2 = e0(h) + Maj(h, a, b); c += t1; g = t1+t2;
- t1 = f + e1(c) + Ch(c, d, e) + 0x0fc19dc6 + W[18];
- t2 = e0(g) + Maj(g, h, a); b += t1; f = t1+t2;
- t1 = e + e1(b) + Ch(b, c, d) + 0x240ca1cc + W[19];
- t2 = e0(f) + Maj(f, g, h); a += t1; e = t1+t2;
- t1 = d + e1(a) + Ch(a, b, c) + 0x2de92c6f + W[20];
- t2 = e0(e) + Maj(e, f, g); h += t1; d = t1+t2;
- t1 = c + e1(h) + Ch(h, a, b) + 0x4a7484aa + W[21];
- t2 = e0(d) + Maj(d, e, f); g += t1; c = t1+t2;
- t1 = b + e1(g) + Ch(g, h, a) + 0x5cb0a9dc + W[22];
- t2 = e0(c) + Maj(c, d, e); f += t1; b = t1+t2;
- t1 = a + e1(f) + Ch(f, g, h) + 0x76f988da + W[23];
- t2 = e0(b) + Maj(b, c, d); e += t1; a = t1+t2;
-
- t1 = h + e1(e) + Ch(e, f, g) + 0x983e5152 + W[24];
- t2 = e0(a) + Maj(a, b, c); d += t1; h = t1+t2;
- t1 = g + e1(d) + Ch(d, e, f) + 0xa831c66d + W[25];
- t2 = e0(h) + Maj(h, a, b); c += t1; g = t1+t2;
- t1 = f + e1(c) + Ch(c, d, e) + 0xb00327c8 + W[26];
- t2 = e0(g) + Maj(g, h, a); b += t1; f = t1+t2;
- t1 = e + e1(b) + Ch(b, c, d) + 0xbf597fc7 + W[27];
- t2 = e0(f) + Maj(f, g, h); a += t1; e = t1+t2;
- t1 = d + e1(a) + Ch(a, b, c) + 0xc6e00bf3 + W[28];
- t2 = e0(e) + Maj(e, f, g); h += t1; d = t1+t2;
- t1 = c + e1(h) + Ch(h, a, b) + 0xd5a79147 + W[29];
- t2 = e0(d) + Maj(d, e, f); g += t1; c = t1+t2;
- t1 = b + e1(g) + Ch(g, h, a) + 0x06ca6351 + W[30];
- t2 = e0(c) + Maj(c, d, e); f += t1; b = t1+t2;
- t1 = a + e1(f) + Ch(f, g, h) + 0x14292967 + W[31];
- t2 = e0(b) + Maj(b, c, d); e += t1; a = t1+t2;
-
- t1 = h + e1(e) + Ch(e, f, g) + 0x27b70a85 + W[32];
- t2 = e0(a) + Maj(a, b, c); d += t1; h = t1+t2;
- t1 = g + e1(d) + Ch(d, e, f) + 0x2e1b2138 + W[33];
- t2 = e0(h) + Maj(h, a, b); c += t1; g = t1+t2;
- t1 = f + e1(c) + Ch(c, d, e) + 0x4d2c6dfc + W[34];
- t2 = e0(g) + Maj(g, h, a); b += t1; f = t1+t2;
- t1 = e + e1(b) + Ch(b, c, d) + 0x53380d13 + W[35];
- t2 = e0(f) + Maj(f, g, h); a += t1; e = t1+t2;
- t1 = d + e1(a) + Ch(a, b, c) + 0x650a7354 + W[36];
- t2 = e0(e) + Maj(e, f, g); h += t1; d = t1+t2;
- t1 = c + e1(h) + Ch(h, a, b) + 0x766a0abb + W[37];
- t2 = e0(d) + Maj(d, e, f); g += t1; c = t1+t2;
- t1 = b + e1(g) + Ch(g, h, a) + 0x81c2c92e + W[38];
- t2 = e0(c) + Maj(c, d, e); f += t1; b = t1+t2;
- t1 = a + e1(f) + Ch(f, g, h) + 0x92722c85 + W[39];
- t2 = e0(b) + Maj(b, c, d); e += t1; a = t1+t2;
-
- t1 = h + e1(e) + Ch(e, f, g) + 0xa2bfe8a1 + W[40];
- t2 = e0(a) + Maj(a, b, c); d += t1; h = t1+t2;
- t1 = g + e1(d) + Ch(d, e, f) + 0xa81a664b + W[41];
- t2 = e0(h) + Maj(h, a, b); c += t1; g = t1+t2;
- t1 = f + e1(c) + Ch(c, d, e) + 0xc24b8b70 + W[42];
- t2 = e0(g) + Maj(g, h, a); b += t1; f = t1+t2;
- t1 = e + e1(b) + Ch(b, c, d) + 0xc76c51a3 + W[43];
- t2 = e0(f) + Maj(f, g, h); a += t1; e = t1+t2;
- t1 = d + e1(a) + Ch(a, b, c) + 0xd192e819 + W[44];
- t2 = e0(e) + Maj(e, f, g); h += t1; d = t1+t2;
- t1 = c + e1(h) + Ch(h, a, b) + 0xd6990624 + W[45];
- t2 = e0(d) + Maj(d, e, f); g += t1; c = t1+t2;
- t1 = b + e1(g) + Ch(g, h, a) + 0xf40e3585 + W[46];
- t2 = e0(c) + Maj(c, d, e); f += t1; b = t1+t2;
- t1 = a + e1(f) + Ch(f, g, h) + 0x106aa070 + W[47];
- t2 = e0(b) + Maj(b, c, d); e += t1; a = t1+t2;
-
- t1 = h + e1(e) + Ch(e, f, g) + 0x19a4c116 + W[48];
- t2 = e0(a) + Maj(a, b, c); d += t1; h = t1+t2;
- t1 = g + e1(d) + Ch(d, e, f) + 0x1e376c08 + W[49];
- t2 = e0(h) + Maj(h, a, b); c += t1; g = t1+t2;
- t1 = f + e1(c) + Ch(c, d, e) + 0x2748774c + W[50];
- t2 = e0(g) + Maj(g, h, a); b += t1; f = t1+t2;
- t1 = e + e1(b) + Ch(b, c, d) + 0x34b0bcb5 + W[51];
- t2 = e0(f) + Maj(f, g, h); a += t1; e = t1+t2;
- t1 = d + e1(a) + Ch(a, b, c) + 0x391c0cb3 + W[52];
- t2 = e0(e) + Maj(e, f, g); h += t1; d = t1+t2;
- t1 = c + e1(h) + Ch(h, a, b) + 0x4ed8aa4a + W[53];
- t2 = e0(d) + Maj(d, e, f); g += t1; c = t1+t2;
- t1 = b + e1(g) + Ch(g, h, a) + 0x5b9cca4f + W[54];
- t2 = e0(c) + Maj(c, d, e); f += t1; b = t1+t2;
- t1 = a + e1(f) + Ch(f, g, h) + 0x682e6ff3 + W[55];
- t2 = e0(b) + Maj(b, c, d); e += t1; a = t1+t2;
-
- t1 = h + e1(e) + Ch(e, f, g) + 0x748f82ee + W[56];
- t2 = e0(a) + Maj(a, b, c); d += t1; h = t1+t2;
- t1 = g + e1(d) + Ch(d, e, f) + 0x78a5636f + W[57];
- t2 = e0(h) + Maj(h, a, b); c += t1; g = t1+t2;
- t1 = f + e1(c) + Ch(c, d, e) + 0x84c87814 + W[58];
- t2 = e0(g) + Maj(g, h, a); b += t1; f = t1+t2;
- t1 = e + e1(b) + Ch(b, c, d) + 0x8cc70208 + W[59];
- t2 = e0(f) + Maj(f, g, h); a += t1; e = t1+t2;
- t1 = d + e1(a) + Ch(a, b, c) + 0x90befffa + W[60];
- t2 = e0(e) + Maj(e, f, g); h += t1; d = t1+t2;
- t1 = c + e1(h) + Ch(h, a, b) + 0xa4506ceb + W[61];
- t2 = e0(d) + Maj(d, e, f); g += t1; c = t1+t2;
- t1 = b + e1(g) + Ch(g, h, a) + 0xbef9a3f7 + W[62];
- t2 = e0(c) + Maj(c, d, e); f += t1; b = t1+t2;
- t1 = a + e1(f) + Ch(f, g, h) + 0xc67178f2 + W[63];
- t2 = e0(b) + Maj(b, c, d); e += t1; a = t1+t2;
-
- state[0] += a; state[1] += b; state[2] += c; state[3] += d;
- state[4] += e; state[5] += f; state[6] += g; state[7] += h;
-
- /* clear any sensitive info... */
- a = b = c = d = e = f = g = h = t1 = t2 = 0;
- memset(W, 0, 64 * sizeof(u32));
-}
-
-int sha256_init(struct sha256_state *sctx)
-{
- sctx->state[0] = SHA256_H0;
- sctx->state[1] = SHA256_H1;
- sctx->state[2] = SHA256_H2;
- sctx->state[3] = SHA256_H3;
- sctx->state[4] = SHA256_H4;
- sctx->state[5] = SHA256_H5;
- sctx->state[6] = SHA256_H6;
- sctx->state[7] = SHA256_H7;
- sctx->count = 0;
-
- return 0;
-}
-
-int sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
-{
- unsigned int partial, done;
- const u8 *src;
-
- partial = sctx->count & 0x3f;
- sctx->count += len;
- done = 0;
- src = data;
-
- if ((partial + len) > 63) {
- if (partial) {
- done = -partial;
- memcpy(sctx->buf + partial, data, done + 64);
- src = sctx->buf;
- }
-
- do {
- sha256_transform(sctx->state, src);
- done += 64;
- src = data + done;
- } while (done + 63 < len);
-
- partial = 0;
- }
- memcpy(sctx->buf + partial, src, len - done);
-
- return 0;
-}
-
-int sha256_final(struct sha256_state *sctx, u8 *out)
-{
- __be32 *dst = (__be32 *)out;
- __be64 bits;
- unsigned int index, pad_len;
- int i;
- static const u8 padding[64] = { 0x80, };
-
- /* Save number of bits */
- bits = cpu_to_be64(sctx->count << 3);
-
- /* Pad out to 56 mod 64. */
- index = sctx->count & 0x3f;
- pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
- sha256_update(sctx, padding, pad_len);
-
- /* Append length (before padding) */
- sha256_update(sctx, (const u8 *)&bits, sizeof(bits));
-
- /* Store state in digest */
- for (i = 0; i < 8; i++)
- dst[i] = cpu_to_be32(sctx->state[i]);
-
- /* Zeroize sensitive information. */
- memset(sctx, 0, sizeof(*sctx));
-
- return 0;
-}
diff --git a/arch/x86/purgatory/sha256.h b/arch/x86/purgatory/sha256.h
deleted file mode 100644
index 2867d9825a57..000000000000
--- a/arch/x86/purgatory/sha256.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Copyright (C) 2014 Red Hat Inc.
- *
- * Author: Vivek Goyal <vgoyal@redhat.com>
- *
- * This source code is licensed under the GNU General Public License,
- * Version 2. See the file COPYING for more details.
- */
-
-#ifndef SHA256_H
-#define SHA256_H
-
-#include <linux/types.h>
-#include <crypto/sha.h>
-
-extern int sha256_init(struct sha256_state *sctx);
-extern int sha256_update(struct sha256_state *sctx, const u8 *input,
- unsigned int length);
-extern int sha256_final(struct sha256_state *sctx, u8 *hash);
-
-#endif /* SHA256_H */
diff --git a/arch/x86/purgatory/string.c b/arch/x86/purgatory/string.c
index d886b1fa36f0..795ca4f2cb3c 100644
--- a/arch/x86/purgatory/string.c
+++ b/arch/x86/purgatory/string.c
@@ -10,4 +10,16 @@
* Version 2. See the file COPYING for more details.
*/
+#include <linux/types.h>
+
#include "../boot/string.c"
+
+void *memcpy(void *dst, const void *src, size_t len)
+{
+ return __builtin_memcpy(dst, src, len);
+}
+
+void *memset(void *dst, int c, size_t len)
+{
+ return __builtin_memset(dst, c, len);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 19:46:13 +0100