diff options
Diffstat (limited to 'arch')
22 files changed, 100 insertions, 64 deletions
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index 8ebbb511c783..23aad0722303 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -74,7 +74,7 @@ ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT) ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS) else ZTEXTADDR := 0 -ZBSSADDR := ALIGN(4) +ZBSSADDR := ALIGN(8) endif SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/ @@ -98,8 +98,6 @@ endif ccflags-y := -fpic -fno-builtin asflags-y := -Wa,-march=all -# Provide size of uncompressed kernel to the decompressor via a linker symbol. -LDFLAGS_vmlinux = --defsym _image_size=$(shell stat -c "%s" $(obj)/../Image) # Supply ZRELADDR to the decompressor via a linker symbol. ifneq ($(CONFIG_AUTO_ZRELADDR),y) LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR) @@ -122,10 +120,23 @@ lib1funcs = $(obj)/lib1funcs.o $(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S FORCE $(call cmd,shipped) +# We need to prevent any GOTOFF relocs being used with references +# to symbols in the .bss section since we cannot relocate them +# independently from the rest at run time. This can be achieved by +# ensuring that no private .bss symbols exist, as global symbols +# always have a GOT entry which is what we need. +# The .data section is already discarded by the linker script so no need +# to bother about it here. +check_for_bad_syms = \ +bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \ +[ -z "$$bad_syms" ] || \ + ( echo "following symbols must have non local/private scope:" >&2; \ + echo "$$bad_syms" >&2; rm -f $@; false ) + $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \ $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE $(call if_changed,ld) - @: + @$(check_for_bad_syms) $(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE $(call if_changed,$(suffix_y)) diff --git a/arch/arm/boot/compressed/decompress.c b/arch/arm/boot/compressed/decompress.c index 4c72a97bc3e1..07be5a2f8302 100644 --- a/arch/arm/boot/compressed/decompress.c +++ b/arch/arm/boot/compressed/decompress.c @@ -44,7 +44,7 @@ extern void error(char *); #include "../../../../lib/decompress_unlzma.c" #endif -void do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x)) +int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x)) { - decompress(input, len, NULL, NULL, output, NULL, error); + return decompress(input, len, NULL, NULL, output, NULL, error); } diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index a36f4526689b..c363458a4e63 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -179,16 +179,29 @@ not_angel: bl cache_on restart: adr r0, LC0 - ldmia r0, {r1, r2, r3, r5, r6, r9, r11, r12} - ldr sp, [r0, #32] + ldmia r0, {r1, r2, r3, r6, r10, r11, r12} + ldr sp, [r0, #28] /* * We might be running at a different address. We need * to fix up various pointers. */ sub r0, r0, r1 @ calculate the delta offset - add r5, r5, r0 @ _start add r6, r6, r0 @ _edata + add r10, r10, r0 @ inflated kernel size location + + /* + * The kernel build system appends the size of the + * decompressed kernel at the end of the compressed data + * in little-endian form. + */ + ldrb r9, [r10, #0] + ldrb lr, [r10, #1] + orr r9, r9, lr, lsl #8 + ldrb lr, [r10, #2] + ldrb r10, [r10, #3] + orr r9, r9, lr, lsl #16 + orr r9, r9, r10, lsl #24 #ifndef CONFIG_ZBOOT_ROM /* malloc space is above the relocated stack (64k max) */ @@ -206,31 +219,40 @@ restart: adr r0, LC0 /* * Check to see if we will overwrite ourselves. * r4 = final kernel address - * r5 = start of this image * r9 = size of decompressed image * r10 = end of this image, including bss/stack/malloc space if non XIP * We basically want: - * r4 >= r10 -> OK - * r4 + image length <= r5 -> OK + * r4 - 16k page directory >= r10 -> OK + * r4 + image length <= current position (pc) -> OK */ + add r10, r10, #16384 cmp r4, r10 bhs wont_overwrite add r10, r4, r9 - cmp r10, r5 + ARM( cmp r10, pc ) + THUMB( mov lr, pc ) + THUMB( cmp r10, lr ) bls wont_overwrite /* * Relocate ourselves past the end of the decompressed kernel. - * r5 = start of this image * r6 = _edata * r10 = end of the decompressed kernel * Because we always copy ahead, we need to do it from the end and go * backward in case the source and destination overlap. */ - /* Round up to next 256-byte boundary. */ - add r10, r10, #256 + /* + * Bump to the next 256-byte boundary with the size of + * the relocation code added. This avoids overwriting + * ourself when the offset is small. + */ + add r10, r10, #((reloc_code_end - restart + 256) & ~255) bic r10, r10, #255 + /* Get start of code we want to copy and align it down. */ + adr r5, restart + bic r5, r5, #31 + sub r9, r6, r5 @ size to copy add r9, r9, #31 @ rounded up to a multiple bic r9, r9, #31 @ ... of 32 bytes @@ -245,6 +267,11 @@ restart: adr r0, LC0 /* Preserve offset to relocated code. */ sub r6, r9, r6 +#ifndef CONFIG_ZBOOT_ROM + /* cache_clean_flush may use the stack, so relocate it */ + add sp, sp, r6 +#endif + bl cache_clean_flush adr r0, BSYM(restart) @@ -333,12 +360,11 @@ not_relocated: mov r0, #0 LC0: .word LC0 @ r1 .word __bss_start @ r2 .word _end @ r3 - .word _start @ r5 .word _edata @ r6 - .word _image_size @ r9 + .word input_data_end - 4 @ r10 (inflated size location) .word _got_start @ r11 .word _got_end @ ip - .word user_stack_end @ sp + .word .L_user_stack_end @ sp .size LC0, . - LC0 #ifdef CONFIG_ARCH_RPC @@ -1056,8 +1082,9 @@ memdump: mov r12, r0 #endif .ltorg +reloc_code_end: .align .section ".stack", "aw", %nobits -user_stack: .space 4096 -user_stack_end: +.L_user_stack: .space 4096 +.L_user_stack_end: diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c index 2df38263124c..832d37236c59 100644 --- a/arch/arm/boot/compressed/misc.c +++ b/arch/arm/boot/compressed/misc.c @@ -26,8 +26,6 @@ unsigned int __machine_arch_type; #include <linux/linkage.h> #include <asm/string.h> -#include <asm/unaligned.h> - static void putstr(const char *ptr); extern void error(char *x); @@ -139,13 +137,12 @@ void *memcpy(void *__dest, __const void *__src, size_t __n) } /* - * gzip delarations + * gzip declarations */ extern char input_data[]; extern char input_data_end[]; unsigned char *output_data; -unsigned long output_ptr; unsigned long free_mem_ptr; unsigned long free_mem_end_ptr; @@ -170,15 +167,15 @@ asmlinkage void __div0(void) error("Attempting division by 0!"); } -extern void do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x)); +extern int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x)); -unsigned long +void decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p, unsigned long free_mem_ptr_end_p, int arch_id) { - unsigned char *tmp; + int ret; output_data = (unsigned char *)output_start; free_mem_ptr = free_mem_ptr_p; @@ -187,12 +184,11 @@ decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p, arch_decomp_setup(); - tmp = (unsigned char *) (((unsigned long)input_data_end) - 4); - output_ptr = get_unaligned_le32(tmp); - putstr("Uncompressing Linux..."); - do_decompress(input_data, input_data_end - input_data, - output_data, error); - putstr(" done, booting the kernel.\n"); - return output_ptr; + ret = do_decompress(input_data, input_data_end - input_data, + output_data, error); + if (ret) + error("decompressor returned an error"); + else + putstr(" done, booting the kernel.\n"); } diff --git a/arch/arm/boot/compressed/vmlinux.lds.in b/arch/arm/boot/compressed/vmlinux.lds.in index 5309909d7282..ea80abe78844 100644 --- a/arch/arm/boot/compressed/vmlinux.lds.in +++ b/arch/arm/boot/compressed/vmlinux.lds.in @@ -54,6 +54,7 @@ SECTIONS .bss : { *(.bss) } _end = .; + . = ALIGN(8); /* the stack must be 64-bit aligned */ .stack : { *(.stack) } .stab 0 : { *(.stab) } diff --git a/arch/arm/mach-davinci/include/mach/uncompress.h b/arch/arm/mach-davinci/include/mach/uncompress.h index 47723e8d75a4..78d80683cdc2 100644 --- a/arch/arm/mach-davinci/include/mach/uncompress.h +++ b/arch/arm/mach-davinci/include/mach/uncompress.h @@ -25,8 +25,7 @@ #include <mach/serial.h> -static u32 *uart; -static u32 *uart_info = (u32 *)(DAVINCI_UART_INFO); +u32 *uart; /* PORT_16C550A, in polled non-fifo mode */ static void putc(char c) @@ -44,6 +43,8 @@ static inline void flush(void) static inline void set_uart_info(u32 phys, void * __iomem virt) { + u32 *uart_info = (u32 *)(DAVINCI_UART_INFO); + uart = (u32 *)phys; uart_info[0] = phys; uart_info[1] = (u32)virt; diff --git a/arch/arm/mach-gemini/include/mach/uncompress.h b/arch/arm/mach-gemini/include/mach/uncompress.h index 5483f61a8061..0efa26247235 100644 --- a/arch/arm/mach-gemini/include/mach/uncompress.h +++ b/arch/arm/mach-gemini/include/mach/uncompress.h @@ -16,7 +16,7 @@ #include <linux/serial_reg.h> #include <mach/hardware.h> -static volatile unsigned long *UART = (unsigned long *)GEMINI_UART_BASE; +static volatile unsigned long * const UART = (unsigned long *)GEMINI_UART_BASE; /* * The following code assumes the serial port has already been diff --git a/arch/arm/mach-iop32x/include/mach/uncompress.h b/arch/arm/mach-iop32x/include/mach/uncompress.h index b247551b6f5a..4fd715496f45 100644 --- a/arch/arm/mach-iop32x/include/mach/uncompress.h +++ b/arch/arm/mach-iop32x/include/mach/uncompress.h @@ -7,7 +7,7 @@ #include <linux/serial_reg.h> #include <mach/hardware.h> -static volatile u8 *uart_base; +volatile u8 *uart_base; #define TX_DONE (UART_LSR_TEMT | UART_LSR_THRE) diff --git a/arch/arm/mach-iop33x/include/mach/uncompress.h b/arch/arm/mach-iop33x/include/mach/uncompress.h index b42423f63302..f99bb848c5a1 100644 --- a/arch/arm/mach-iop33x/include/mach/uncompress.h +++ b/arch/arm/mach-iop33x/include/mach/uncompress.h @@ -7,7 +7,7 @@ #include <linux/serial_reg.h> #include <mach/hardware.h> -static volatile u32 *uart_base; +volatile u32 *uart_base; #define TX_DONE (UART_LSR_TEMT | UART_LSR_THRE) diff --git a/arch/arm/mach-ixp4xx/include/mach/uncompress.h b/arch/arm/mach-ixp4xx/include/mach/uncompress.h index 2db0078a8cf2..219d7c1dcdba 100644 --- a/arch/arm/mach-ixp4xx/include/mach/uncompress.h +++ b/arch/arm/mach-ixp4xx/include/mach/uncompress.h @@ -19,7 +19,7 @@ #define TX_DONE (UART_LSR_TEMT|UART_LSR_THRE) -static volatile u32* uart_base; +volatile u32* uart_base; static inline void putc(int c) { diff --git a/arch/arm/mach-mmp/include/mach/uncompress.h b/arch/arm/mach-mmp/include/mach/uncompress.h index 85bd8a2d84b5..d6daeb7e4ef1 100644 --- a/arch/arm/mach-mmp/include/mach/uncompress.h +++ b/arch/arm/mach-mmp/include/mach/uncompress.h @@ -14,7 +14,7 @@ #define UART2_BASE (APB_PHYS_BASE + 0x17000) #define UART3_BASE (APB_PHYS_BASE + 0x18000) -static volatile unsigned long *UART; +volatile unsigned long *UART; static inline void putc(char c) { diff --git a/arch/arm/mach-mxs/include/mach/uncompress.h b/arch/arm/mach-mxs/include/mach/uncompress.h index f12a1732d8b8..7f8bf6539646 100644 --- a/arch/arm/mach-mxs/include/mach/uncompress.h +++ b/arch/arm/mach-mxs/include/mach/uncompress.h @@ -20,7 +20,7 @@ #include <asm/mach-types.h> -static unsigned long mxs_duart_base; +unsigned long mxs_duart_base; #define MXS_DUART(x) (*(volatile unsigned long *)(mxs_duart_base + (x))) diff --git a/arch/arm/mach-ns9xxx/include/mach/uncompress.h b/arch/arm/mach-ns9xxx/include/mach/uncompress.h index 770a68c46e81..00ef4a6d7cb4 100644 --- a/arch/arm/mach-ns9xxx/include/mach/uncompress.h +++ b/arch/arm/mach-ns9xxx/include/mach/uncompress.h @@ -20,7 +20,7 @@ static void putc_dummy(char c, void __iomem *base) /* nothing */ } -static int timeout; +int timeout; static void putc_ns9360(char c, void __iomem *base) { diff --git a/arch/arm/mach-nuc93x/include/mach/uncompress.h b/arch/arm/mach-nuc93x/include/mach/uncompress.h index 73082cd61e84..381cb9baadd5 100644 --- a/arch/arm/mach-nuc93x/include/mach/uncompress.h +++ b/arch/arm/mach-nuc93x/include/mach/uncompress.h @@ -27,7 +27,7 @@ #define arch_decomp_wdog() #define TX_DONE (UART_LSR_TEMT | UART_LSR_THRE) -static u32 * uart_base = (u32 *)UART0_PA; +static u32 * const uart_base = (u32 *)UART0_PA; static void putc(int ch) { diff --git a/arch/arm/mach-pxa/include/mach/uncompress.h b/arch/arm/mach-pxa/include/mach/uncompress.h index 759b851ec985..5519a34b667f 100644 --- a/arch/arm/mach-pxa/include/mach/uncompress.h +++ b/arch/arm/mach-pxa/include/mach/uncompress.h @@ -16,9 +16,9 @@ #define BTUART_BASE (0x40200000) #define STUART_BASE (0x40700000) -static unsigned long uart_base; -static unsigned int uart_shift; -static unsigned int uart_is_pxa; +unsigned long uart_base; +unsigned int uart_shift; +unsigned int uart_is_pxa; static inline unsigned char uart_read(int offset) { diff --git a/arch/arm/mach-rpc/include/mach/uncompress.h b/arch/arm/mach-rpc/include/mach/uncompress.h index 8c9e2c7161c6..9cd9bcdad6cc 100644 --- a/arch/arm/mach-rpc/include/mach/uncompress.h +++ b/arch/arm/mach-rpc/include/mach/uncompress.h @@ -66,12 +66,12 @@ extern __attribute__((pure)) struct param_struct *params(void); #define params (params()) #ifndef STANDALONE_DEBUG -static unsigned long video_num_cols; -static unsigned long video_num_rows; -static unsigned long video_x; -static unsigned long video_y; -static unsigned char bytes_per_char_v; -static int white; +unsigned long video_num_cols; +unsigned long video_num_rows; +unsigned long video_x; +unsigned long video_y; +unsigned char bytes_per_char_v; +int white; /* * This does not append a newline diff --git a/arch/arm/mach-s5p64x0/include/mach/uncompress.h b/arch/arm/mach-s5p64x0/include/mach/uncompress.h index c65b229aab23..1608faf870ff 100644 --- a/arch/arm/mach-s5p64x0/include/mach/uncompress.h +++ b/arch/arm/mach-s5p64x0/include/mach/uncompress.h @@ -24,8 +24,8 @@ typedef unsigned int upf_t; /* cannot include linux/serial_core.h */ /* uart setup */ -static unsigned int fifo_mask; -static unsigned int fifo_max; +unsigned int fifo_mask; +unsigned int fifo_max; /* forward declerations */ @@ -43,7 +43,7 @@ static void arch_detect_cpu(void); /* how many bytes we allow into the FIFO at a time in FIFO mode */ #define FIFO_MAX (14) -static unsigned long uart_base; +unsigned long uart_base; static __inline__ void get_uart_base(void) { diff --git a/arch/arm/mach-ux500/include/mach/uncompress.h b/arch/arm/mach-ux500/include/mach/uncompress.h index ab0fe1432fae..088b550c40df 100644 --- a/arch/arm/mach-ux500/include/mach/uncompress.h +++ b/arch/arm/mach-ux500/include/mach/uncompress.h @@ -24,7 +24,7 @@ #include <linux/amba/serial.h> #include <mach/hardware.h> -static u32 ux500_uart_base; +u32 ux500_uart_base; static void putc(const char c) { diff --git a/arch/arm/mach-w90x900/include/mach/uncompress.h b/arch/arm/mach-w90x900/include/mach/uncompress.h index 56f1a74d7016..03130212ace2 100644 --- a/arch/arm/mach-w90x900/include/mach/uncompress.h +++ b/arch/arm/mach-w90x900/include/mach/uncompress.h @@ -27,7 +27,7 @@ #define arch_decomp_wdog() #define TX_DONE (UART_LSR_TEMT | UART_LSR_THRE) -static volatile u32 * uart_base = (u32 *)UART0_PA; +static volatile u32 * const uart_base = (u32 *)UART0_PA; static void putc(int ch) { diff --git a/arch/arm/plat-mxc/include/mach/uncompress.h b/arch/arm/plat-mxc/include/mach/uncompress.h index 4864b0afd440..d85e2d1c0324 100644 --- a/arch/arm/plat-mxc/include/mach/uncompress.h +++ b/arch/arm/plat-mxc/include/mach/uncompress.h @@ -21,7 +21,7 @@ #include <asm/mach-types.h> -static unsigned long uart_base; +unsigned long uart_base; #define UART(x) (*(volatile unsigned long *)(uart_base + (x))) diff --git a/arch/arm/plat-omap/include/plat/uncompress.h b/arch/arm/plat-omap/include/plat/uncompress.h index 30b891c4a93f..565d2664f5a7 100644 --- a/arch/arm/plat-omap/include/plat/uncompress.h +++ b/arch/arm/plat-omap/include/plat/uncompress.h @@ -27,8 +27,8 @@ #define MDR1_MODE_MASK 0x07 -static volatile u8 *uart_base; -static int uart_shift; +volatile u8 *uart_base; +int uart_shift; /* * Store the DEBUG_LL uart number into memory. diff --git a/arch/arm/plat-samsung/include/plat/uncompress.h b/arch/arm/plat-samsung/include/plat/uncompress.h index 7d6ed7263d57..ee48e12a1e72 100644 --- a/arch/arm/plat-samsung/include/plat/uncompress.h +++ b/arch/arm/plat-samsung/include/plat/uncompress.h @@ -18,8 +18,8 @@ typedef unsigned int upf_t; /* cannot include linux/serial_core.h */ /* uart setup */ -static unsigned int fifo_mask; -static unsigned int fifo_max; +unsigned int fifo_mask; +unsigned int fifo_max; /* forward declerations */ |
