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-rw-r--r--arch/mips/boot/.gitignore1
-rw-r--r--arch/mips/boot/Makefile49
-rw-r--r--arch/mips/boot/compressed/Makefile81
-rw-r--r--arch/mips/boot/compressed/calc_vmlinuz_load_addr.c57
-rw-r--r--arch/mips/boot/compressed/decompress.c38
-rw-r--r--arch/mips/boot/compressed/ld.script51
6 files changed, 154 insertions, 123 deletions
diff --git a/arch/mips/boot/.gitignore b/arch/mips/boot/.gitignore
index 4667a5f9280b..f210b09ececc 100644
--- a/arch/mips/boot/.gitignore
+++ b/arch/mips/boot/.gitignore
@@ -3,3 +3,4 @@ elf2ecoff
vmlinux.*
zImage
zImage.tmp
+calc_vmlinuz_load_addr
diff --git a/arch/mips/boot/Makefile b/arch/mips/boot/Makefile
index e39a08edcaaa..85bcb5adc7cb 100644
--- a/arch/mips/boot/Makefile
+++ b/arch/mips/boot/Makefile
@@ -11,35 +11,32 @@
# Some DECstations need all possible sections of an ECOFF executable
#
ifdef CONFIG_MACH_DECSTATION
- E2EFLAGS = -a
-else
- E2EFLAGS =
+ e2eflag := -a
endif
#
# Drop some uninteresting sections in the kernel.
# This is only relevant for ELF kernels but doesn't hurt a.out
#
-drop-sections = .reginfo .mdebug .comment .note .pdr .options .MIPS.options
-strip-flags = $(addprefix --remove-section=,$(drop-sections))
-
-VMLINUX = vmlinux
-
-all: vmlinux.ecoff vmlinux.srec
-
-vmlinux.ecoff: $(obj)/elf2ecoff $(VMLINUX)
- $(obj)/elf2ecoff $(VMLINUX) $(obj)/vmlinux.ecoff $(E2EFLAGS)
-
-$(obj)/elf2ecoff: $(obj)/elf2ecoff.c
- $(HOSTCC) -o $@ $^
-
-vmlinux.bin: $(VMLINUX)
- $(OBJCOPY) -O binary $(strip-flags) $(VMLINUX) $(obj)/vmlinux.bin
-
-vmlinux.srec: $(VMLINUX)
- $(OBJCOPY) -S -O srec $(strip-flags) $(VMLINUX) $(obj)/vmlinux.srec
-
-clean-files += elf2ecoff \
- vmlinux.bin \
- vmlinux.ecoff \
- vmlinux.srec
+drop-sections := .reginfo .mdebug .comment .note .pdr .options .MIPS.options
+strip-flags := $(addprefix --remove-section=,$(drop-sections))
+
+hostprogs-y := elf2ecoff
+
+targets := vmlinux.ecoff
+quiet_cmd_ecoff = ECOFF $@
+ cmd_ecoff = $(obj)/elf2ecoff $(VMLINUX) $@ $(e2eflag)
+$(obj)/vmlinux.ecoff: $(obj)/elf2ecoff $(VMLINUX) FORCE
+ $(call if_changed,ecoff)
+
+targets += vmlinux.bin
+quiet_cmd_bin = OBJCOPY $@
+ cmd_bin = $(OBJCOPY) -O binary $(strip-flags) $(VMLINUX) $@
+$(obj)/vmlinux.bin: $(VMLINUX) FORCE
+ $(call if_changed,bin)
+
+targets += vmlinux.srec
+quiet_cmd_srec = OBJCOPY $@
+ cmd_srec = $(OBJCOPY) -S -O srec $(strip-flags) $(VMLINUX) $@
+$(obj)/vmlinux.srec: $(VMLINUX) FORCE
+ $(call if_changed,srec)
diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile
index 790ddd397620..ed9bb709c9a3 100644
--- a/arch/mips/boot/compressed/Makefile
+++ b/arch/mips/boot/compressed/Makefile
@@ -12,14 +12,6 @@
# Author: Wu Zhangjin <wuzhangjin@gmail.com>
#
-# compressed kernel load addr: VMLINUZ_LOAD_ADDRESS > VMLINUX_LOAD_ADDRESS + VMLINUX_SIZE
-VMLINUX_SIZE := $(shell wc -c $(objtree)/$(KBUILD_IMAGE) 2>/dev/null | cut -d' ' -f1)
-VMLINUX_SIZE := $(shell [ -n "$(VMLINUX_SIZE)" ] && echo -n $$(($(VMLINUX_SIZE) + (65536 - $(VMLINUX_SIZE) % 65536))))
-# VMLINUZ_LOAD_ADDRESS = concat "high32 of VMLINUX_LOAD_ADDRESS" and "(low32 of VMLINUX_LOAD_ADDRESS) + VMLINUX_SIZE"
-HIGH32 := $(shell A=$(VMLINUX_LOAD_ADDRESS); [ $${\#A} -gt 10 ] && expr substr "$(VMLINUX_LOAD_ADDRESS)" 3 $$(($${\#A} - 10)))
-LOW32 := $(shell [ -n "$(HIGH32)" ] && A=11 || A=3; expr substr "$(VMLINUX_LOAD_ADDRESS)" $${A} 8)
-VMLINUZ_LOAD_ADDRESS := 0x$(shell [ -n "$(VMLINUX_SIZE)" -a -n "$(LOW32)" ] && printf "$(HIGH32)%08x" $$(($(VMLINUX_SIZE) + 0x$(LOW32))))
-
# set the default size of the mallocing area for decompressing
BOOT_HEAP_SIZE := 0x400000
@@ -33,49 +25,61 @@ KBUILD_AFLAGS := $(LINUXINCLUDE) $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \
-DKERNEL_ENTRY=0x$(shell $(NM) $(objtree)/$(KBUILD_IMAGE) 2>/dev/null | grep " kernel_entry" | cut -f1 -d \ )
-obj-y := $(obj)/head.o $(obj)/decompress.o $(obj)/dbg.o
+targets := head.o decompress.o dbg.o uart-16550.o uart-alchemy.o
+
+# decompressor objects (linked with vmlinuz)
+vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/dbg.o
ifdef CONFIG_DEBUG_ZBOOT
-obj-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o
-obj-$(CONFIG_MACH_ALCHEMY) += $(obj)/uart-alchemy.o
+vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o
+vmlinuzobjs-$(CONFIG_MIPS_ALCHEMY) += $(obj)/uart-alchemy.o
endif
+targets += vmlinux.bin
OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S
-$(obj)/vmlinux.bin: $(KBUILD_IMAGE)
+$(obj)/vmlinux.bin: $(KBUILD_IMAGE) FORCE
$(call if_changed,objcopy)
-suffix_$(CONFIG_KERNEL_GZIP) = gz
-suffix_$(CONFIG_KERNEL_BZIP2) = bz2
-suffix_$(CONFIG_KERNEL_LZMA) = lzma
-suffix_$(CONFIG_KERNEL_LZO) = lzo
tool_$(CONFIG_KERNEL_GZIP) = gzip
tool_$(CONFIG_KERNEL_BZIP2) = bzip2
tool_$(CONFIG_KERNEL_LZMA) = lzma
tool_$(CONFIG_KERNEL_LZO) = lzo
-$(obj)/vmlinux.$(suffix_y): $(obj)/vmlinux.bin
+
+targets += vmlinux.bin.z
+$(obj)/vmlinux.bin.z: $(obj)/vmlinux.bin FORCE
$(call if_changed,$(tool_y))
-$(obj)/piggy.o: $(obj)/vmlinux.$(suffix_y) $(obj)/dummy.o
- $(Q)$(OBJCOPY) $(OBJCOPYFLAGS) \
- --add-section=.image=$< \
- --set-section-flags=.image=contents,alloc,load,readonly,data \
- $(obj)/dummy.o $@
+targets += piggy.o
+OBJCOPYFLAGS_piggy.o := --add-section=.image=$(obj)/vmlinux.bin.z \
+ --set-section-flags=.image=contents,alloc,load,readonly,data
+$(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.bin.z FORCE
+ $(call if_changed,objcopy)
+
+# Calculate the load address of the compressed kernel image
+hostprogs-y := calc_vmlinuz_load_addr
+
+VMLINUZ_LOAD_ADDRESS = $(shell $(obj)/calc_vmlinuz_load_addr \
+ $(objtree)/$(KBUILD_IMAGE) $(VMLINUX_LOAD_ADDRESS))
-LDFLAGS_vmlinuz := $(LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T
-vmlinuz: $(src)/ld.script $(obj-y) $(obj)/piggy.o
- $(call if_changed,ld)
- $(Q)$(OBJCOPY) $(OBJCOPYFLAGS) $@
+vmlinuzobjs-y += $(obj)/piggy.o
+
+quiet_cmd_zld = LD $@
+ cmd_zld = $(LD) $(LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T $< $(vmlinuzobjs-y) -o $@
+quiet_cmd_strip = STRIP $@
+ cmd_strip = $(STRIP) -s $@
+vmlinuz: $(src)/ld.script $(vmlinuzobjs-y) $(obj)/calc_vmlinuz_load_addr
+ $(call cmd,zld)
+ $(call cmd,strip)
#
# Some DECstations need all possible sections of an ECOFF executable
#
ifdef CONFIG_MACH_DECSTATION
- E2EFLAGS = -a
-else
- E2EFLAGS =
+ e2eflag := -a
endif
# elf2ecoff can only handle 32bit image
+hostprogs-y += ../elf2ecoff
ifdef CONFIG_32BIT
VMLINUZ = vmlinuz
@@ -83,23 +87,22 @@ else
VMLINUZ = vmlinuz.32
endif
+quiet_cmd_32 = OBJCOPY $@
+ cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
vmlinuz.32: vmlinuz
- $(Q)$(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
+ $(call cmd,32)
+quiet_cmd_ecoff = ECOFF $@
+ cmd_ecoff = $< $(VMLINUZ) $@ $(e2eflag)
vmlinuz.ecoff: $(obj)/../elf2ecoff $(VMLINUZ)
- $(Q)$(obj)/../elf2ecoff $(VMLINUZ) vmlinuz.ecoff $(E2EFLAGS)
-
-$(obj)/../elf2ecoff: $(src)/../elf2ecoff.c
- $(Q)$(HOSTCC) -o $@ $^
+ $(call cmd,ecoff)
OBJCOPYFLAGS_vmlinuz.bin := $(OBJCOPYFLAGS) -O binary
vmlinuz.bin: vmlinuz
- $(call if_changed,objcopy)
+ $(call cmd,objcopy)
OBJCOPYFLAGS_vmlinuz.srec := $(OBJCOPYFLAGS) -S -O srec
vmlinuz.srec: vmlinuz
- $(call if_changed,objcopy)
+ $(call cmd,objcopy)
-clean:
-clean-files += *.o \
- vmlinu*
+clean-files := $(objtree)/vmlinuz.*
diff --git a/arch/mips/boot/compressed/calc_vmlinuz_load_addr.c b/arch/mips/boot/compressed/calc_vmlinuz_load_addr.c
new file mode 100644
index 000000000000..88c9d963be88
--- /dev/null
+++ b/arch/mips/boot/compressed/calc_vmlinuz_load_addr.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2010 "Wu Zhangjin" <wuzhangjin@gmail.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; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char *argv[])
+{
+ struct stat sb;
+ uint64_t vmlinux_size, vmlinux_load_addr, vmlinuz_load_addr;
+
+ if (argc != 3) {
+ fprintf(stderr, "Usage: %s <pathname> <vmlinux_load_addr>\n",
+ argv[0]);
+ return EXIT_FAILURE;
+ }
+
+ if (stat(argv[1], &sb) == -1) {
+ perror("stat");
+ return EXIT_FAILURE;
+ }
+
+ /* Convert hex characters to dec number */
+ errno = 0;
+ if (sscanf(argv[2], "%llx", &vmlinux_load_addr) != 1) {
+ if (errno != 0)
+ perror("sscanf");
+ else
+ fprintf(stderr, "No matching characters\n");
+
+ return EXIT_FAILURE;
+ }
+
+ vmlinux_size = (uint64_t)sb.st_size;
+ vmlinuz_load_addr = vmlinux_load_addr + vmlinux_size;
+
+ /*
+ * Align with 16 bytes: "greater than that used for any standard data
+ * types by a MIPS compiler." -- See MIPS Run Linux (Second Edition).
+ */
+
+ vmlinuz_load_addr += (16 - vmlinux_size % 16);
+
+ printf("0x%llx\n", vmlinuz_load_addr);
+
+ return EXIT_SUCCESS;
+}
diff --git a/arch/mips/boot/compressed/decompress.c b/arch/mips/boot/compressed/decompress.c
index 5db43c58b1bf..5cad0faefa17 100644
--- a/arch/mips/boot/compressed/decompress.c
+++ b/arch/mips/boot/compressed/decompress.c
@@ -1,9 +1,6 @@
/*
- * Misc. bootloader code for many machines.
- *
* Copyright 2001 MontaVista Software Inc.
- * Author: Matt Porter <mporter@mvista.com> Derived from
- * arch/ppc/boot/prep/misc.c
+ * Author: Matt Porter <mporter@mvista.com>
*
* Copyright (C) 2009 Lemote, Inc.
* Author: Wu Zhangjin <wuzhangjin@gmail.com>
@@ -19,12 +16,12 @@
#include <asm/addrspace.h>
-/* These two variables specify the free mem region
+/*
+ * These two variables specify the free mem region
* that can be used for temporary malloc area
*/
unsigned long free_mem_ptr;
unsigned long free_mem_end_ptr;
-char *zimage_start;
/* The linker tells us where the image is. */
extern unsigned char __image_begin, __image_end;
@@ -83,38 +80,31 @@ void *memset(void *s, int c, size_t n)
void decompress_kernel(unsigned long boot_heap_start)
{
- int zimage_size;
-
- /*
- * We link ourself to an arbitrary low address. When we run, we
- * relocate outself to that address. __image_beign points to
- * the part of the image where the zImage is. -- Tom
- */
- zimage_start = (char *)(unsigned long)(&__image_begin);
+ unsigned long zimage_start, zimage_size;
+
+ zimage_start = (unsigned long)(&__image_begin);
zimage_size = (unsigned long)(&__image_end) -
(unsigned long)(&__image_begin);
- /*
- * The zImage and initrd will be between start and _end, so they've
- * already been moved once. We're good to go now. -- Tom
- */
puts("zimage at: ");
- puthex((unsigned long)zimage_start);
+ puthex(zimage_start);
puts(" ");
- puthex((unsigned long)(zimage_size + zimage_start));
+ puthex(zimage_size + zimage_start);
puts("\n");
- /* this area are prepared for mallocing when decompressing */
+ /* This area are prepared for mallocing when decompressing */
free_mem_ptr = boot_heap_start;
free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE;
- /* Display standard Linux/MIPS boot prompt for kernel args */
+ /* Display standard Linux/MIPS boot prompt */
puts("Uncompressing Linux at load address ");
puthex(VMLINUX_LOAD_ADDRESS_ULL);
puts("\n");
+
/* Decompress the kernel with according algorithm */
- decompress(zimage_start, zimage_size, 0, 0,
+ decompress((char *)zimage_start, zimage_size, 0, 0,
(void *)VMLINUX_LOAD_ADDRESS_ULL, 0, error);
- /* FIXME: is there a need to flush cache here? */
+
+ /* FIXME: should we flush cache here? */
puts("Now, booting the kernel...\n");
}
diff --git a/arch/mips/boot/compressed/ld.script b/arch/mips/boot/compressed/ld.script
index 613a35b02f50..8e6b07ca2f5e 100644
--- a/arch/mips/boot/compressed/ld.script
+++ b/arch/mips/boot/compressed/ld.script
@@ -2,61 +2,44 @@
* ld.script for compressed kernel support of MIPS
*
* Copyright (C) 2009 Lemote Inc.
- * Author: Wu Zhangjin <wuzj@lemote.com>
+ * Author: Wu Zhangjin <wuzhanjing@gmail.com>
+ * Copyright (C) 2010 "Wu Zhangjin" <wuzhanjing@gmail.com>
*/
OUTPUT_ARCH(mips)
ENTRY(start)
SECTIONS
{
- /* . = VMLINUZ_LOAD_ADDRESS */
- /* read-only */
- _text = .; /* Text and read-only data */
- .text : {
- _ftext = . ;
+ /* Text and read-only data */
+ /* . = VMLINUZ_LOAD_ADDRESS; */
+ .text : {
*(.text)
*(.rodata)
- } = 0
- _etext = .; /* End of text section */
+ }
+ /* End of text section */
- /* writable */
- .data : { /* Data */
- _fdata = . ;
+ /* Writable data */
+ .data : {
*(.data)
- /* Put the compressed image here, so bss is on the end. */
+ /* Put the compressed image here */
__image_begin = .;
*(.image)
__image_end = .;
CONSTRUCTORS
}
- .sdata : { *(.sdata) }
- . = ALIGN(4);
- _edata = .; /* End of data section */
+ . = ALIGN(16);
+ _edata = .;
+ /* End of data section */
/* BSS */
- __bss_start = .;
- _fbss = .;
- .sbss : { *(.sbss) *(.scommon) }
- .bss : {
- *(.dynbss)
+ .bss : {
*(.bss)
- *(COMMON)
}
- . = ALIGN(4);
- _end = . ;
-
- /* These are needed for ELF backends which have not yet been converted
- * to the new style linker. */
-
- .stab 0 : { *(.stab) }
- .stabstr 0 : { *(.stabstr) }
-
- /* These must appear regardless of . */
- .gptab.sdata : { *(.gptab.data) *(.gptab.sdata) }
- .gptab.sbss : { *(.gptab.bss) *(.gptab.sbss) }
+ . = ALIGN(16);
+ _end = .;
/* Sections to be discarded */
- /DISCARD/ : {
+ /DISCARD/ : {
*(.MIPS.options)
*(.options)
*(.pdr)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.