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| author | Yinghai Lu <yinghai@kernel.org> | 2016-04-18 09:42:11 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-04-19 10:30:50 +0200 |
| commit | 206f25a8319b312b9983953a308b0e38e1943c1c (patch) | |
| tree | 6b2ace2d618466b57ebfe027bbbff35187bf9419 /arch/x86/boot | |
| parent | 9b238748cb6e9fadab0e761f6d30ba311b4ac470 (diff) | |
| download | blackbird-obmc-linux-206f25a8319b312b9983953a308b0e38e1943c1c.tar.gz blackbird-obmc-linux-206f25a8319b312b9983953a308b0e38e1943c1c.zip | |
x86/KASLR: Remove unneeded boot_params argument
Since the boot_params can be found using the real_mode global variable,
there is no need to pass around a pointer to it. This slightly simplifies
the choose_kernel_location function and its callers.
[kees: rewrote changelog, tracked file rename]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: H.J. Lu <hjl.tools@gmail.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1460997735-24785-3-git-send-email-keescook@chromium.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/boot')
| -rw-r--r-- | arch/x86/boot/compressed/kaslr.c | 5 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/misc.c | 2 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/misc.h | 6 |
3 files changed, 5 insertions, 8 deletions
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c index 6a9b96b4624d..622aa881c6ab 100644 --- a/arch/x86/boot/compressed/kaslr.c +++ b/arch/x86/boot/compressed/kaslr.c @@ -295,8 +295,7 @@ static unsigned long find_random_addr(unsigned long minimum, return slots_fetch_random(); } -unsigned char *choose_kernel_location(struct boot_params *boot_params, - unsigned char *input, +unsigned char *choose_kernel_location(unsigned char *input, unsigned long input_size, unsigned char *output, unsigned long output_size) @@ -316,7 +315,7 @@ unsigned char *choose_kernel_location(struct boot_params *boot_params, } #endif - boot_params->hdr.loadflags |= KASLR_FLAG; + real_mode->hdr.loadflags |= KASLR_FLAG; /* Record the various known unsafe memory ranges. */ mem_avoid_init((unsigned long)input, input_size, diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c index 79dac1758e7c..f35ad9eb1bf1 100644 --- a/arch/x86/boot/compressed/misc.c +++ b/arch/x86/boot/compressed/misc.c @@ -428,7 +428,7 @@ asmlinkage __visible void *decompress_kernel(void *rmode, memptr heap, * the entire decompressed kernel plus relocation table, or the * entire decompressed kernel plus .bss and .brk sections. */ - output = choose_kernel_location(real_mode, input_data, input_len, output, + output = choose_kernel_location(input_data, input_len, output, output_len > run_size ? output_len : run_size); diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h index a8c4e087e14d..22346d5a2fa0 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -67,8 +67,7 @@ int cmdline_find_option_bool(const char *option); #if CONFIG_RANDOMIZE_BASE /* kaslr.c */ -unsigned char *choose_kernel_location(struct boot_params *boot_params, - unsigned char *input, +unsigned char *choose_kernel_location(unsigned char *input, unsigned long input_size, unsigned char *output, unsigned long output_size); @@ -76,8 +75,7 @@ unsigned char *choose_kernel_location(struct boot_params *boot_params, bool has_cpuflag(int flag); #else static inline -unsigned char *choose_kernel_location(struct boot_params *boot_params, - unsigned char *input, +unsigned char *choose_kernel_location(unsigned char *input, unsigned long input_size, unsigned char *output, unsigned long output_size) |
