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-rw-r--r--arch/x86/boot/tools/build.c273
1 files changed, 9 insertions, 264 deletions
diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c
index bd247692b..10311d77c 100644
--- a/arch/x86/boot/tools/build.c
+++ b/arch/x86/boot/tools/build.c
@@ -40,10 +40,6 @@ typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
-#define DEFAULT_MAJOR_ROOT 0
-#define DEFAULT_MINOR_ROOT 0
-#define DEFAULT_ROOT_DEV (DEFAULT_MAJOR_ROOT << 8 | DEFAULT_MINOR_ROOT)
-
/* Minimal number of setup sectors */
#define SETUP_SECT_MIN 5
#define SETUP_SECT_MAX 64
@@ -51,22 +47,7 @@ typedef unsigned int u32;
/* This must be large enough to hold the entire setup */
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
-
-static unsigned long efi32_stub_entry;
-static unsigned long efi64_stub_entry;
-static unsigned long efi_pe_entry;
-static unsigned long efi32_pe_entry;
-static unsigned long kernel_info;
-static unsigned long startup_64;
-static unsigned long _ehead;
-static unsigned long _end;
+static unsigned long _edata;
/*----------------------------------------------------------------------*/
@@ -152,180 +133,6 @@ static void usage(void)
die("Usage: build setup system zoffset.h image");
}
-#ifdef CONFIG_EFI_STUB
-
-static void update_pecoff_section_header_fields(char *section_name, u32 vma, u32 size, u32 datasz, u32 offset)
-{
- unsigned int pe_header;
- unsigned short num_sections;
- u8 *section;
-
- pe_header = get_unaligned_le32(&buf[0x3c]);
- num_sections = get_unaligned_le16(&buf[pe_header + 6]);
-
-#ifdef CONFIG_X86_32
- section = &buf[pe_header + 0xa8];
-#else
- section = &buf[pe_header + 0xb8];
-#endif
-
- while (num_sections > 0) {
- if (strncmp((char*)section, section_name, 8) == 0) {
- /* section header size field */
- put_unaligned_le32(size, section + 0x8);
-
- /* section header vma field */
- put_unaligned_le32(vma, section + 0xc);
-
- /* section header 'size of initialised data' field */
- put_unaligned_le32(datasz, section + 0x10);
-
- /* section header 'file offset' field */
- put_unaligned_le32(offset, section + 0x14);
-
- break;
- }
- section += 0x28;
- num_sections--;
- }
-}
-
-static void update_pecoff_section_header(char *section_name, u32 offset, u32 size)
-{
- update_pecoff_section_header_fields(section_name, offset, size, size, offset);
-}
-
-static void update_pecoff_setup_and_reloc(unsigned int size)
-{
- u32 setup_offset = 0x200;
- 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);
- update_pecoff_section_header(".reloc", reloc_offset, PECOFF_RELOC_RESERVE);
-
- /*
- * Modify .reloc section contents with a single entry. The
- * relocation is applied to offset 10 of the relocation section.
- */
- 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,
- unsigned int init_sz)
-{
- unsigned int pe_header;
- unsigned int text_sz = file_sz - text_start;
- unsigned int bss_sz = init_sz - file_sz;
-
- pe_header = get_unaligned_le32(&buf[0x3c]);
-
- /*
- * The PE/COFF loader may load the image at an address which is
- * misaligned with respect to the kernel_alignment field in the setup
- * header.
- *
- * In order to avoid relocating the kernel to correct the misalignment,
- * add slack to allow the buffer to be aligned within the declared size
- * of the image.
- */
- bss_sz += CONFIG_PHYSICAL_ALIGN;
- init_sz += CONFIG_PHYSICAL_ALIGN;
-
- /*
- * Size of code: Subtract the size of the first sector (512 bytes)
- * which includes the header.
- */
- put_unaligned_le32(file_sz - 512 + bss_sz, &buf[pe_header + 0x1c]);
-
- /* Size of image */
- put_unaligned_le32(init_sz, &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_fields(".text", text_start, text_sz + bss_sz,
- text_sz, text_start);
-}
-
-static int reserve_pecoff_reloc_section(int c)
-{
- /* Reserve 0x20 bytes for .reloc section */
- memset(buf+c, 0, PECOFF_RELOC_RESERVE);
- return PECOFF_RELOC_RESERVE;
-}
-
-static void efi_stub_defaults(void)
-{
- /* Defaults for old kernel */
-#ifdef CONFIG_X86_32
- efi_pe_entry = 0x10;
-#else
- efi_pe_entry = 0x210;
- startup_64 = 0x200;
-#endif
-}
-
-static void efi_stub_entry_update(void)
-{
- unsigned long addr = efi32_stub_entry;
-
-#ifdef CONFIG_EFI_HANDOVER_PROTOCOL
-#ifdef CONFIG_X86_64
- /* Yes, this is really how we defined it :( */
- addr = efi64_stub_entry - 0x200;
-#endif
-
-#ifdef CONFIG_EFI_MIXED
- if (efi32_stub_entry != addr)
- die("32-bit and 64-bit EFI entry points do not match\n");
-#endif
-#endif
- put_unaligned_le32(addr, &buf[0x264]);
-}
-
-#else
-
-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,
- unsigned int init_sz) {}
-static inline void efi_stub_defaults(void) {}
-static inline void efi_stub_entry_update(void) {}
-
-static inline int reserve_pecoff_reloc_section(int c)
-{
- return 0;
-}
-#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
* but that would mean tools/build would have to be rebuilt every time. It's
@@ -354,14 +161,7 @@ static void parse_zoffset(char *fname)
p = (char *)buf;
while (p && *p) {
- 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);
- PARSE_ZOFS(p, _ehead);
- PARSE_ZOFS(p, _end);
+ PARSE_ZOFS(p, _edata);
p = strchr(p, '\n');
while (p && (*p == '\r' || *p == '\n'))
@@ -371,17 +171,14 @@ static void parse_zoffset(char *fname)
int main(int argc, char ** argv)
{
- unsigned int i, sz, setup_sectors, init_sz;
+ unsigned int i, sz, setup_sectors;
int c;
- u32 sys_size;
struct stat sb;
FILE *file, *dest;
int fd;
void *kernel;
u32 crc = 0xffffffffUL;
- efi_stub_defaults();
-
if (argc != 5)
usage();
parse_zoffset(argv[3]);
@@ -403,72 +200,27 @@ 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 */
- setup_sectors = (c + 511) / 512;
+ setup_sectors = (c + 4095) / 4096;
+ setup_sectors *= 8;
if (setup_sectors < SETUP_SECT_MIN)
setup_sectors = SETUP_SECT_MIN;
i = setup_sectors*512;
memset(buf+c, 0, i-c);
- update_pecoff_setup_and_reloc(i);
-
- /* Set the default root device */
- put_unaligned_le16(DEFAULT_ROOT_DEV, &buf[508]);
-
/* Open and stat the kernel file */
fd = open(argv[2], O_RDONLY);
if (fd < 0)
die("Unable to open `%s': %m", argv[2]);
if (fstat(fd, &sb))
die("Unable to stat `%s': %m", argv[2]);
- sz = sb.st_size;
+ if (_edata != sb.st_size)
+ die("Unexpected file size `%s': %u != %u", argv[2], _edata,
+ sb.st_size);
+ sz = _edata - 4;
kernel = mmap(NULL, sz, PROT_READ, MAP_SHARED, fd, 0);
if (kernel == MAP_FAILED)
die("Unable to mmap '%s': %m", argv[2]);
- /* Number of 16-byte paragraphs, including space for a 4-byte CRC */
- sys_size = (sz + 15 + 4) / 16;
-#ifdef CONFIG_EFI_STUB
- /*
- * COFF requires minimum 32-byte alignment of sections, and
- * adding a signature is problematic without that alignment.
- */
- sys_size = (sys_size + 1) & ~1;
-#endif
-
- /* Patch the setup code with the appropriate size parameters */
- buf[0x1f1] = setup_sectors-1;
- put_unaligned_le32(sys_size, &buf[0x1f4]);
-
- init_sz = get_unaligned_le32(&buf[0x260]);
-#ifdef CONFIG_EFI_STUB
- /*
- * The decompression buffer will start at ImageBase. When relocating
- * the compressed kernel to its end, we must ensure that the head
- * section does not get overwritten. The head section occupies
- * [i, i + _ehead), and the destination is [init_sz - _end, init_sz).
- *
- * At present these should never overlap, because 'i' is at most 32k
- * because of SETUP_SECT_MAX, '_ehead' is less than 1k, and the
- * calculation of INIT_SIZE in boot/header.S ensures that
- * 'init_sz - _end' is at least 64k.
- *
- * For future-proofing, increase init_sz if necessary.
- */
-
- if (init_sz - _end < i + _ehead) {
- init_sz = (i + _ehead + _end + 4095) & ~4095;
- put_unaligned_le32(init_sz, &buf[0x260]);
- }
-#endif
- update_pecoff_text(setup_sectors * 512, i + (sys_size * 16), init_sz);
-
- efi_stub_entry_update();
-
- /* Update kernel_info offset. */
- put_unaligned_le32(kernel_info, &buf[0x268]);
crc = partial_crc32(buf, i, crc);
if (fwrite(buf, 1, i, dest) != i)
@@ -479,13 +231,6 @@ int main(int argc, char ** argv)
if (fwrite(kernel, 1, sz, dest) != sz)
die("Writing kernel failed");
- /* Add padding leaving 4 bytes for the checksum */
- while (sz++ < (sys_size*16) - 4) {
- crc = partial_crc32_one('\0', crc);
- if (fwrite("\0", 1, 1, dest) != 1)
- die("Writing padding failed");
- }
-
/* Write the CRC */
put_unaligned_le32(crc, buf);
if (fwrite(buf, 1, 4, dest) != 4)