summaryrefslogtreecommitdiffstats
path: root/arch/x86/boot
diff options
context:
space:
mode:
authorAnton Arapov <anton@redhat.com>2012-08-07 11:21:50 +0200
committerAnton Arapov <anton@redhat.com>2012-08-07 12:52:25 +0200
commit1d44b6f3fcf6058fb7c960b7558766967e8028f7 (patch)
tree53d88547c973ba048d233091a3f91f3173ad01df /arch/x86/boot
parentd91eda5d7b0383e6a0c83e0146ff141ff3b1355b (diff)
downloadkernel-uprobes-1d44b6f3fcf6058fb7c960b7558766967e8028f7.tar.gz
kernel-uprobes-1d44b6f3fcf6058fb7c960b7558766967e8028f7.tar.xz
kernel-uprobes-1d44b6f3fcf6058fb7c960b7558766967e8028f7.zip
fedora kernel: 222b075b3ff0d9e88aa9353e3c80667756ed7361v3.5.0-4
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/x86/boot')
-rw-r--r--arch/x86/boot/compressed/eboot.c101
-rw-r--r--arch/x86/boot/compressed/eboot.h6
-rw-r--r--arch/x86/boot/header.S62
-rw-r--r--arch/x86/boot/main.c18
-rw-r--r--arch/x86/boot/tools/build.c154
5 files changed, 245 insertions, 96 deletions
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index 0cdfc0d2315..4e85f5f8583 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -16,6 +16,26 @@
static efi_system_table_t *sys_table;
+static void efi_printk(char *str)
+{
+ char *s8;
+
+ for (s8 = str; *s8; s8++) {
+ struct efi_simple_text_output_protocol *out;
+ efi_char16_t ch[2] = { 0 };
+
+ ch[0] = *s8;
+ out = (struct efi_simple_text_output_protocol *)sys_table->con_out;
+
+ if (*s8 == '\n') {
+ efi_char16_t nl[2] = { '\r', 0 };
+ efi_call_phys2(out->output_string, out, nl);
+ }
+
+ efi_call_phys2(out->output_string, out, ch);
+ }
+}
+
static efi_status_t __get_map(efi_memory_desc_t **map, unsigned long *map_size,
unsigned long *desc_size)
{
@@ -531,8 +551,10 @@ static efi_status_t handle_ramdisks(efi_loaded_image_t *image,
EFI_LOADER_DATA,
nr_initrds * sizeof(*initrds),
&initrds);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to alloc mem for initrds\n");
goto fail;
+ }
str = (char *)(unsigned long)hdr->cmd_line_ptr;
for (i = 0; i < nr_initrds; i++) {
@@ -575,32 +597,42 @@ static efi_status_t handle_ramdisks(efi_loaded_image_t *image,
status = efi_call_phys3(boottime->handle_protocol,
image->device_handle, &fs_proto, &io);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to handle fs_proto\n");
goto free_initrds;
+ }
status = efi_call_phys2(io->open_volume, io, &fh);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to open volume\n");
goto free_initrds;
+ }
}
status = efi_call_phys5(fh->open, fh, &h, filename_16,
EFI_FILE_MODE_READ, (u64)0);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to open initrd file\n");
goto close_handles;
+ }
initrd->handle = h;
info_sz = 0;
status = efi_call_phys4(h->get_info, h, &info_guid,
&info_sz, NULL);
- if (status != EFI_BUFFER_TOO_SMALL)
+ if (status != EFI_BUFFER_TOO_SMALL) {
+ efi_printk("Failed to get initrd info size\n");
goto close_handles;
+ }
grow:
status = efi_call_phys3(sys_table->boottime->allocate_pool,
EFI_LOADER_DATA, info_sz, &info);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to alloc mem for initrd info\n");
goto close_handles;
+ }
status = efi_call_phys4(h->get_info, h, &info_guid,
&info_sz, info);
@@ -612,8 +644,10 @@ grow:
file_sz = info->file_size;
efi_call_phys1(sys_table->boottime->free_pool, info);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to get initrd info\n");
goto close_handles;
+ }
initrd->size = file_sz;
initrd_total += file_sz;
@@ -629,11 +663,14 @@ grow:
*/
status = high_alloc(initrd_total, 0x1000,
&initrd_addr, hdr->initrd_addr_max);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to alloc highmem for initrds\n");
goto close_handles;
+ }
/* We've run out of free low memory. */
if (initrd_addr > hdr->initrd_addr_max) {
+ efi_printk("We've run out of free low memory\n");
status = EFI_INVALID_PARAMETER;
goto free_initrd_total;
}
@@ -652,8 +689,10 @@ grow:
status = efi_call_phys3(fh->read,
initrds[j].handle,
&chunksize, addr);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to read initrd\n");
goto free_initrd_total;
+ }
addr += chunksize;
size -= chunksize;
}
@@ -674,7 +713,7 @@ free_initrd_total:
low_free(initrd_total, initrd_addr);
close_handles:
- for (k = j; k < nr_initrds; k++)
+ for (k = j; k < i; k++)
efi_call_phys1(fh->close, initrds[k].handle);
free_initrds:
efi_call_phys1(sys_table->boottime->free_pool, initrds);
@@ -732,8 +771,10 @@ static efi_status_t make_boot_params(struct boot_params *boot_params,
options_size++; /* NUL termination */
status = low_alloc(options_size, 1, &cmdline);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to alloc mem for cmdline\n");
goto fail;
+ }
s1 = (u8 *)(unsigned long)cmdline;
s2 = (u16 *)options;
@@ -895,20 +936,32 @@ struct boot_params *efi_main(void *handle, efi_system_table_t *_table)
status = efi_call_phys3(sys_table->boottime->handle_protocol,
handle, &proto, (void *)&image);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
goto fail;
+ }
status = low_alloc(0x4000, 1, (unsigned long *)&boot_params);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to alloc lowmem for boot params\n");
goto fail;
+ }
memset(boot_params, 0x0, 0x4000);
- /* Copy first two sectors to boot_params */
- memcpy(boot_params, image->image_base, 1024);
-
hdr = &boot_params->hdr;
+ /* 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;
+
/*
* The EFI firmware loader could have placed the kernel image
* anywhere in memory, but the kernel has various restrictions
@@ -925,8 +978,10 @@ struct boot_params *efi_main(void *handle, efi_system_table_t *_table)
if (status != EFI_SUCCESS) {
status = low_alloc(hdr->init_size, hdr->kernel_alignment,
&start);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to alloc mem for kernel\n");
goto fail;
+ }
}
hdr->code32_start = (__u32)start;
@@ -937,19 +992,25 @@ struct boot_params *efi_main(void *handle, efi_system_table_t *_table)
status = efi_call_phys3(sys_table->boottime->allocate_pool,
EFI_LOADER_DATA, sizeof(*gdt),
(void **)&gdt);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to alloc mem for gdt structure\n");
goto fail;
+ }
gdt->size = 0x800;
status = low_alloc(gdt->size, 8, (unsigned long *)&gdt->address);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to alloc mem for gdt\n");
goto fail;
+ }
status = efi_call_phys3(sys_table->boottime->allocate_pool,
EFI_LOADER_DATA, sizeof(*idt),
(void **)&idt);
- if (status != EFI_SUCCESS)
+ if (status != EFI_SUCCESS) {
+ efi_printk("Failed to alloc mem for idt structure\n");
goto fail;
+ }
idt->size = 0;
idt->address = 0;
diff --git a/arch/x86/boot/compressed/eboot.h b/arch/x86/boot/compressed/eboot.h
index 39251663e65..3b6e15627c5 100644
--- a/arch/x86/boot/compressed/eboot.h
+++ b/arch/x86/boot/compressed/eboot.h
@@ -58,4 +58,10 @@ struct efi_uga_draw_protocol {
void *blt;
};
+struct efi_simple_text_output_protocol {
+ void *reset;
+ void *output_string;
+ void *test_string;
+};
+
#endif /* BOOT_COMPRESSED_EBOOT_H */
diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S
index f1bbeeb0914..efe5acfc79c 100644
--- a/arch/x86/boot/header.S
+++ b/arch/x86/boot/header.S
@@ -94,10 +94,10 @@ bs_die:
.section ".bsdata", "a"
bugger_off_msg:
- .ascii "Direct booting from floppy is no longer supported.\r\n"
- .ascii "Please use a boot loader program instead.\r\n"
+ .ascii "Direct floppy boot is not supported. "
+ .ascii "Use a boot loader program instead.\r\n"
.ascii "\n"
- .ascii "Remove disk and press any key to reboot . . .\r\n"
+ .ascii "Remove disk and press any key to reboot ...\r\n"
.byte 0
#ifdef CONFIG_EFI_STUB
@@ -111,7 +111,7 @@ coff_header:
#else
.word 0x8664 # x86-64
#endif
- .word 2 # nr_sections
+ .word 3 # nr_sections
.long 0 # TimeDateStamp
.long 0 # PointerToSymbolTable
.long 1 # NumberOfSymbols
@@ -147,7 +147,7 @@ optional_header:
# Filled in by build.c
.long 0x0000 # AddressOfEntryPoint
- .long 0x0000 # BaseOfCode
+ .long 0x0200 # BaseOfCode
#ifdef CONFIG_X86_32
.long 0 # data
#endif
@@ -158,8 +158,8 @@ extra_header_fields:
#else
.quad 0 # ImageBase
#endif
- .long 0x1000 # SectionAlignment
- .long 0x200 # FileAlignment
+ .long 0x20 # SectionAlignment
+ .long 0x20 # FileAlignment
.word 0 # MajorOperatingSystemVersion
.word 0 # MinorOperatingSystemVersion
.word 0 # MajorImageVersion
@@ -189,7 +189,7 @@ extra_header_fields:
.quad 0 # SizeOfHeapCommit
#endif
.long 0 # LoaderFlags
- .long 0x1 # NumberOfRvaAndSizes
+ .long 0x6 # NumberOfRvaAndSizes
.quad 0 # ExportTable
.quad 0 # ImportTable
@@ -200,8 +200,10 @@ extra_header_fields:
# Section table
section_table:
- .ascii ".text"
- .byte 0
+ #
+ # The offset & size fields are filled in by build.c.
+ #
+ .ascii ".setup"
.byte 0
.byte 0
.long 0
@@ -217,23 +219,40 @@ section_table:
#
# The EFI application loader requires a relocation section
- # because EFI applications are relocatable and not having
- # this section seems to confuse it. But since we don't need
- # the loader to fixup any relocs for us just fill it with a
- # single dummy reloc.
+ # because EFI applications must be relocatable. The .reloc
+ # offset & size fields are filled in by build.c.
#
.ascii ".reloc"
.byte 0
.byte 0
- .long reloc_end - reloc_start
- .long reloc_start
- .long reloc_end - reloc_start # SizeOfRawData
- .long reloc_start # PointerToRawData
+ .long 0
+ .long 0
+ .long 0 # SizeOfRawData
+ .long 0 # PointerToRawData
.long 0 # PointerToRelocations
.long 0 # PointerToLineNumbers
.word 0 # NumberOfRelocations
.word 0 # NumberOfLineNumbers
.long 0x42100040 # Characteristics (section flags)
+
+ #
+ # The offset & size fields are filled in by build.c.
+ #
+ .ascii ".text"
+ .byte 0
+ .byte 0
+ .byte 0
+ .long 0
+ .long 0x0 # startup_{32,64}
+ .long 0 # Size of initialized data
+ # on disk
+ .long 0x0 # startup_{32,64}
+ .long 0 # PointerToRelocations
+ .long 0 # PointerToLineNumbers
+ .word 0 # NumberOfRelocations
+ .word 0 # NumberOfLineNumbers
+ .long 0x60500020 # Characteristics (section flags)
+
#endif /* CONFIG_EFI_STUB */
# Kernel attributes; used by setup. This is part 1 of the
@@ -469,10 +488,3 @@ setup_corrupt:
.data
dummy: .long 0
-
- .section .reloc
-reloc_start:
- .long dummy - reloc_start
- .long 10
- .word 0
-reloc_end:
diff --git a/arch/x86/boot/main.c b/arch/x86/boot/main.c
index 40358c8905b..cf6083d444f 100644
--- a/arch/x86/boot/main.c
+++ b/arch/x86/boot/main.c
@@ -57,14 +57,20 @@ static void copy_boot_params(void)
}
/*
- * Set the keyboard repeat rate to maximum. Unclear why this
+ * Query the keyboard lock status as given by the BIOS, and
+ * set the keyboard repeat rate to maximum. Unclear why the latter
* is done here; this might be possible to kill off as stale code.
*/
-static void keyboard_set_repeat(void)
+static void keyboard_init(void)
{
- struct biosregs ireg;
+ struct biosregs ireg, oreg;
initregs(&ireg);
- ireg.ax = 0x0305;
+
+ ireg.ah = 0x02; /* Get keyboard status */
+ intcall(0x16, &ireg, &oreg);
+ boot_params.kbd_status = oreg.al;
+
+ ireg.ax = 0x0305; /* Set keyboard repeat rate */
intcall(0x16, &ireg, NULL);
}
@@ -151,8 +157,8 @@ void main(void)
/* Detect memory layout */
detect_memory();
- /* Set keyboard repeat rate (why?) */
- keyboard_set_repeat();
+ /* Set keyboard repeat rate (why?) and query the lock flags */
+ keyboard_init();
/* Query MCA information */
query_mca();
diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c
index 24443a33208..4b8e165ee57 100644
--- a/arch/x86/boot/tools/build.c
+++ b/arch/x86/boot/tools/build.c
@@ -50,6 +50,8 @@ typedef unsigned int u32;
u8 buf[SETUP_SECT_MAX*512];
int is_big_kernel;
+#define PECOFF_RELOC_RESERVE 0x20
+
/*----------------------------------------------------------------------*/
static const u32 crctab32[] = {
@@ -133,11 +135,103 @@ static void usage(void)
die("Usage: build setup system [> image]");
}
-int main(int argc, char ** argv)
-{
#ifdef CONFIG_EFI_STUB
- unsigned int file_sz, pe_header;
+
+static void update_pecoff_section_header(char *section_name, u32 offset, u32 size)
+{
+ 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(offset, section + 0xc);
+
+ /* section header 'size of initialised data' field */
+ put_unaligned_le32(size, section + 0x10);
+
+ /* section header 'file offset' field */
+ put_unaligned_le32(offset, section + 0x14);
+
+ break;
+ }
+ section += 0x28;
+ num_sections--;
+ }
+}
+
+static void update_pecoff_setup_and_reloc(unsigned int size)
+{
+ u32 setup_offset = 0x200;
+ u32 reloc_offset = size - PECOFF_RELOC_RESERVE;
+ 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]);
+}
+
+static void update_pecoff_text(unsigned int text_start, unsigned int file_sz)
+{
+ unsigned int pe_header;
+ unsigned int text_sz = file_sz - text_start;
+
+ pe_header = get_unaligned_le32(&buf[0x3c]);
+
+ /* Size of image */
+ put_unaligned_le32(file_sz, &buf[pe_header + 0x50]);
+
+ /*
+ * 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]);
+
+#ifdef CONFIG_X86_32
+ /*
+ * Address of entry point.
+ *
+ * The EFI stub entry point is +16 bytes from the start of
+ * the .text section.
+ */
+ put_unaligned_le32(text_start + 16, &buf[pe_header + 0x28]);
+#else
+ /*
+ * Address of entry point. startup_32 is at the beginning and
+ * the 64-bit entry point (startup_64) is always 512 bytes
+ * after. The EFI stub entry point is 16 bytes after that, as
+ * the first instruction allows legacy loaders to jump over
+ * the EFI stub initialisation
+ */
+ put_unaligned_le32(text_start + 528, &buf[pe_header + 0x28]);
+#endif /* CONFIG_X86_32 */
+
+ update_pecoff_section_header(".text", text_start, text_sz);
+}
+
+#endif /* CONFIG_EFI_STUB */
+
+int main(int argc, char ** argv)
+{
unsigned int i, sz, setup_sectors;
int c;
u32 sys_size;
@@ -163,6 +257,12 @@ int main(int argc, char ** argv)
die("Boot block hasn't got boot flag (0xAA55)");
fclose(file);
+#ifdef CONFIG_EFI_STUB
+ /* Reserve 0x20 bytes for .reloc section */
+ memset(buf+c, 0, PECOFF_RELOC_RESERVE);
+ c += PECOFF_RELOC_RESERVE;
+#endif
+
/* Pad unused space with zeros */
setup_sectors = (c + 511) / 512;
if (setup_sectors < SETUP_SECT_MIN)
@@ -170,6 +270,10 @@ int main(int argc, char ** argv)
i = setup_sectors*512;
memset(buf+c, 0, i-c);
+#ifdef CONFIG_EFI_STUB
+ update_pecoff_setup_and_reloc(i);
+#endif
+
/* Set the default root device */
put_unaligned_le16(DEFAULT_ROOT_DEV, &buf[508]);
@@ -194,48 +298,8 @@ int main(int argc, char ** argv)
put_unaligned_le32(sys_size, &buf[0x1f4]);
#ifdef CONFIG_EFI_STUB
- file_sz = sz + i + ((sys_size * 16) - sz);
-
- pe_header = get_unaligned_le32(&buf[0x3c]);
-
- /* Size of code */
- put_unaligned_le32(file_sz, &buf[pe_header + 0x1c]);
-
- /* Size of image */
- put_unaligned_le32(file_sz, &buf[pe_header + 0x50]);
-
-#ifdef CONFIG_X86_32
- /*
- * Address of entry point.
- *
- * The EFI stub entry point is +16 bytes from the start of
- * the .text section.
- */
- put_unaligned_le32(i + 16, &buf[pe_header + 0x28]);
-
- /* .text size */
- put_unaligned_le32(file_sz, &buf[pe_header + 0xb0]);
-
- /* .text size of initialised data */
- put_unaligned_le32(file_sz, &buf[pe_header + 0xb8]);
-#else
- /*
- * Address of entry point. startup_32 is at the beginning and
- * the 64-bit entry point (startup_64) is always 512 bytes
- * after. The EFI stub entry point is 16 bytes after that, as
- * the first instruction allows legacy loaders to jump over
- * the EFI stub initialisation
- */
- put_unaligned_le32(i + 528, &buf[pe_header + 0x28]);
-
- /* .text size */
- put_unaligned_le32(file_sz, &buf[pe_header + 0xc0]);
-
- /* .text size of initialised data */
- put_unaligned_le32(file_sz, &buf[pe_header + 0xc8]);
-
-#endif /* CONFIG_X86_32 */
-#endif /* CONFIG_EFI_STUB */
+ update_pecoff_text(setup_sectors * 512, sz + i + ((sys_size * 16) - sz));
+#endif
crc = partial_crc32(buf, i, crc);
if (fwrite(buf, 1, i, stdout) != i)