diff options
Diffstat (limited to 'arch/s390/boot')
| -rw-r--r-- | arch/s390/boot/compressed/Makefile | 5 | ||||
| -rw-r--r-- | arch/s390/boot/compressed/head.S | 2 | ||||
| -rw-r--r-- | arch/s390/boot/compressed/misc.c | 39 |
3 files changed, 25 insertions, 21 deletions
diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile index 0daa070d6c9d..f7e4c834ea24 100644 --- a/arch/s390/boot/compressed/Makefile +++ b/arch/s390/boot/compressed/Makefile @@ -10,7 +10,7 @@ targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4 targets += misc.o piggy.o sizes.h head.o -KBUILD_CFLAGS := -m64 -D__KERNEL__ $(LINUX_INCLUDE) -O2 +KBUILD_CFLAGS := -m64 -D__KERNEL__ -O2 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks -msoft-float KBUILD_CFLAGS += $(call cc-option,-mpacked-stack) @@ -19,7 +19,8 @@ KBUILD_CFLAGS += $(call cc-option,-ffreestanding) GCOV_PROFILE := n UBSAN_SANITIZE := n -OBJECTS := $(addprefix $(objtree)/arch/s390/kernel/, head.o sclp.o ebcdic.o als.o) +OBJECTS := $(addprefix $(objtree)/arch/s390/kernel/, head.o ebcdic.o als.o) +OBJECTS += $(objtree)/drivers/s390/char/sclp_early_core.o OBJECTS += $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T diff --git a/arch/s390/boot/compressed/head.S b/arch/s390/boot/compressed/head.S index 28c4f96a2d9c..11f6254c561e 100644 --- a/arch/s390/boot/compressed/head.S +++ b/arch/s390/boot/compressed/head.S @@ -46,7 +46,7 @@ mover_end: .align 8 .Lstack: - .quad 0x8000 + (1<<(PAGE_SHIFT+THREAD_ORDER)) + .quad 0x8000 + (1<<(PAGE_SHIFT+THREAD_SIZE_ORDER)) .Loffset: .quad 0x11000 .Lmvsize: diff --git a/arch/s390/boot/compressed/misc.c b/arch/s390/boot/compressed/misc.c index 4da604ebf6fd..33ca29333e18 100644 --- a/arch/s390/boot/compressed/misc.c +++ b/arch/s390/boot/compressed/misc.c @@ -6,7 +6,7 @@ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> */ -#include <asm/uaccess.h> +#include <linux/uaccess.h> #include <asm/page.h> #include <asm/sclp.h> #include <asm/ipl.h> @@ -66,7 +66,7 @@ static unsigned long free_mem_end_ptr; static int puts(const char *s) { - _sclp_print_early(s); + sclp_early_printk(s); return 0; } @@ -141,31 +141,34 @@ static void check_ipl_parmblock(void *start, unsigned long size) unsigned long decompress_kernel(void) { - unsigned long output_addr; - unsigned char *output; + void *output, *kernel_end; - output_addr = ((unsigned long) &_end + HEAP_SIZE + 4095UL) & -4096UL; - check_ipl_parmblock((void *) 0, output_addr + SZ__bss_start); - memset(&_bss, 0, &_ebss - &_bss); - free_mem_ptr = (unsigned long)&_end; - free_mem_end_ptr = free_mem_ptr + HEAP_SIZE; - output = (unsigned char *) output_addr; + output = (void *) ALIGN((unsigned long) &_end + HEAP_SIZE, PAGE_SIZE); + kernel_end = output + SZ__bss_start; + check_ipl_parmblock((void *) 0, (unsigned long) kernel_end); #ifdef CONFIG_BLK_DEV_INITRD /* * Move the initrd right behind the end of the decompressed - * kernel image. + * kernel image. This also prevents initrd corruption caused by + * bss clearing since kernel_end will always be located behind the + * current bss section.. */ - if (INITRD_START && INITRD_SIZE && - INITRD_START < (unsigned long) output + SZ__bss_start) { - check_ipl_parmblock(output + SZ__bss_start, - INITRD_START + INITRD_SIZE); - memmove(output + SZ__bss_start, - (void *) INITRD_START, INITRD_SIZE); - INITRD_START = (unsigned long) output + SZ__bss_start; + if (INITRD_START && INITRD_SIZE && kernel_end > (void *) INITRD_START) { + check_ipl_parmblock(kernel_end, INITRD_SIZE); + memmove(kernel_end, (void *) INITRD_START, INITRD_SIZE); + INITRD_START = (unsigned long) kernel_end; } #endif + /* + * Clear bss section. free_mem_ptr and free_mem_end_ptr need to be + * initialized afterwards since they reside in bss. + */ + memset(&_bss, 0, &_ebss - &_bss); + free_mem_ptr = (unsigned long) &_end; + free_mem_end_ptr = free_mem_ptr + HEAP_SIZE; + puts("Uncompressing Linux... "); __decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error); puts("Ok, booting the kernel.\n"); |