From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
To: kernel-hardening@lists.openwall.com
Cc: linux-arm-kernel@lists.infradead.org,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Arnd Bergmann <arnd@arndb.de>, Nicolas Pitre <nico@linaro.org>,
Russell King <linux@armlinux.org.uk>,
Kees Cook <keescook@chromium.org>,
Thomas Garnier <thgarnie@google.com>,
Marc Zyngier <marc.zyngier@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Tony Lindgren <tony@atomide.com>,
Matt Fleming <matt@codeblueprint.co.uk>,
Dave Martin <dave.martin@arm.com>
Subject: [kernel-hardening] [PATCH 12/30] arm-soc: exynos: replace open coded VA->PA conversions
Date: Mon, 14 Aug 2017 13:53:53 +0100 [thread overview]
Message-ID: <20170814125411.22604-13-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <20170814125411.22604-1-ard.biesheuvel@linaro.org>
This replaces a couple of open coded calculations to obtain the
physical address of a far symbol with calls to the new adr_l etc
macros.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
arch/arm/mach-exynos/headsmp.S | 9 +------
arch/arm/mach-exynos/sleep.S | 26 ++++----------------
2 files changed, 6 insertions(+), 29 deletions(-)
diff --git a/arch/arm/mach-exynos/headsmp.S b/arch/arm/mach-exynos/headsmp.S
index d3d24ab351ae..25de5aff1c41 100644
--- a/arch/arm/mach-exynos/headsmp.S
+++ b/arch/arm/mach-exynos/headsmp.S
@@ -23,10 +23,7 @@ ENTRY(exynos4_secondary_startup)
ARM_BE8(setend be)
mrc p15, 0, r0, c0, c0, 5
and r0, r0, #15
- adr r4, 1f
- ldmia r4, {r5, r6}
- sub r4, r4, r5
- add r6, r6, r4
+ adr_l r6, pen_release
pen: ldr r7, [r6]
cmp r7, r0
bne pen
@@ -37,7 +34,3 @@ pen: ldr r7, [r6]
*/
b secondary_startup
ENDPROC(exynos4_secondary_startup)
-
- .align 2
-1: .long .
- .long pen_release
diff --git a/arch/arm/mach-exynos/sleep.S b/arch/arm/mach-exynos/sleep.S
index cf950790fbdc..003465699263 100644
--- a/arch/arm/mach-exynos/sleep.S
+++ b/arch/arm/mach-exynos/sleep.S
@@ -17,6 +17,7 @@
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
+#include <asm/assembler.h>
#include <asm/hardware/cache-l2x0.h>
#include "smc.h"
@@ -62,19 +63,13 @@ ENTRY(exynos_cpu_resume_ns)
cmp r0, r1
bne skip_cp15
- adr r0, _cp15_save_power
- ldr r1, [r0]
- ldr r1, [r0, r1]
- adr r0, _cp15_save_diag
- ldr r2, [r0]
- ldr r2, [r0, r2]
+ ldr_l r1, cp15_save_power
+ ldr_l r2, cp15_save_diag
mov r0, #SMC_CMD_C15RESUME
dsb
smc #0
#ifdef CONFIG_CACHE_L2X0
- adr r0, 1f
- ldr r2, [r0]
- add r0, r2, r0
+ adr_l r0, l2x0_saved_regs
/* Check that the address has been initialised. */
ldr r1, [r0, #L2X0_R_PHY_BASE]
@@ -93,9 +88,7 @@ ENTRY(exynos_cpu_resume_ns)
smc #0
/* Reload saved regs pointer because smc corrupts registers. */
- adr r0, 1f
- ldr r2, [r0]
- add r0, r2, r0
+ adr_l r0, l2x0_saved_regs
ldr r1, [r0, #L2X0_R_PWR_CTRL]
ldr r2, [r0, #L2X0_R_AUX_CTRL]
@@ -114,15 +107,6 @@ skip_cp15:
b cpu_resume
ENDPROC(exynos_cpu_resume_ns)
- .align
-_cp15_save_power:
- .long cp15_save_power - .
-_cp15_save_diag:
- .long cp15_save_diag - .
-#ifdef CONFIG_CACHE_L2X0
-1: .long l2x0_saved_regs - .
-#endif /* CONFIG_CACHE_L2X0 */
-
.data
.globl cp15_save_diag
cp15_save_diag:
--
2.11.0
next prev parent reply other threads:[~2017-08-14 12:53 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-14 12:53 [kernel-hardening] [PATCH 00/30] implement KASLR for ARM Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 01/30] asm-generic: add .data.rel.ro sections to __ro_after_init Ard Biesheuvel
2017-08-14 14:26 ` [kernel-hardening] " Arnd Bergmann
2017-08-14 12:53 ` [kernel-hardening] [PATCH 02/30] ARM: assembler: introduce adr_l, ldr_l and str_l macros Ard Biesheuvel
2017-08-14 15:29 ` [kernel-hardening] " Dave Martin
2017-08-14 15:38 ` Ard Biesheuvel
2017-08-14 15:50 ` Dave Martin
2017-08-14 16:18 ` Nicolas Pitre
2017-08-14 16:22 ` Ard Biesheuvel
2017-08-14 16:33 ` Nicolas Pitre
2017-08-14 16:42 ` Russell King - ARM Linux
2017-08-14 16:56 ` Ard Biesheuvel
2017-08-14 15:32 ` Dave Martin
2017-08-14 15:40 ` Ard Biesheuvel
2017-08-14 15:53 ` Dave Martin
2017-08-14 12:53 ` [kernel-hardening] [PATCH 03/30] ARM: head-common.S: use PC-relative insn sequence for __proc_info Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 04/30] ARM: head-common.S: use PC-relative insn sequence for idmap creation Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 05/30] ARM: head.S: use PC-relative insn sequence for secondary_data Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 06/30] ARM: kernel: use relative references for UP/SMP alternatives Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 07/30] ARM: head: use PC-relative insn sequence for __smp_alt Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 08/30] ARM: sleep.S: use PC-relative insn sequence for sleep_save_sp/mpidr_hash Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 09/30] ARM: head.S: use PC-relative insn sequences for __fixup_pv_table Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 10/30] ARM: head.S: use PC relative insn sequence to calculate PHYS_OFFSET Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 11/30] ARM: kvm: replace open coded VA->PA calculations with adr_l call Ard Biesheuvel
2017-08-14 12:53 ` Ard Biesheuvel [this message]
2017-08-14 12:53 ` [kernel-hardening] [PATCH 13/30] arm-soc: mvebu: replace open coded VA->PA conversion Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 14/30] arm-soc: various: replace open coded VA->PA calculation of pen_release Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 15/30] ARM: kernel: switch to relative exception tables Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 16/30] ARM: kernel: use relative phys-to-virt patch tables Ard Biesheuvel
2017-08-14 12:53 ` [kernel-hardening] [PATCH 17/30] arm-soc: tegra: make sleep asm code runtime relocatable Ard Biesheuvel
2017-08-14 14:42 ` [kernel-hardening] " Dave Martin
2017-08-14 14:49 ` Ard Biesheuvel
2017-08-14 15:29 ` Dave Martin
2017-08-14 12:53 ` [kernel-hardening] [PATCH 18/30] ARM: kernel: make vmlinux buildable as a PIE executable Ard Biesheuvel
2017-08-14 12:54 ` [kernel-hardening] [PATCH 19/30] ARM: kernel: use PC-relative symbol references in MMU switch code Ard Biesheuvel
2017-08-14 12:54 ` [kernel-hardening] [PATCH 20/30] ARM: kernel: use PC relative symbol references in suspend/resume code Ard Biesheuvel
2017-08-14 16:02 ` [kernel-hardening] " Nicolas Pitre
2017-08-14 18:14 ` Ard Biesheuvel
2017-08-14 18:37 ` Nicolas Pitre
2017-08-14 12:54 ` [kernel-hardening] [PATCH 21/30] ARM: mm: export default vmalloc base address Ard Biesheuvel
2017-08-14 12:54 ` [kernel-hardening] [PATCH 22/30] ARM: kernel: refer to swapper_pg_dir via its symbol Ard Biesheuvel
2017-08-14 12:54 ` [kernel-hardening] [PATCH 23/30] ARM: kernel: implement randomization of the kernel load address Ard Biesheuvel
2017-08-14 12:54 ` [kernel-hardening] [PATCH 24/30] ARM: decompressor: explicitly map decompressor binary cacheable Ard Biesheuvel
2017-08-14 12:54 ` [kernel-hardening] [PATCH 25/30] ARM: compressed: factor out zImage header and make it extensible Ard Biesheuvel
2017-08-14 12:54 ` [kernel-hardening] [PATCH 26/30] ARM: decompressor: add KASLR support Ard Biesheuvel
2017-08-14 12:54 ` [kernel-hardening] [PATCH 27/30] efi/libstub: add 'max' parameter to efi_random_alloc() Ard Biesheuvel
2017-08-14 12:54 ` [kernel-hardening] [PATCH 28/30] efi/libstub: check for vmalloc= command line argument Ard Biesheuvel
2017-08-14 12:54 ` [kernel-hardening] [PATCH 29/30] efi/libstub: arm: reserve bootloader supplied initrd in memory map Ard Biesheuvel
2017-08-18 11:48 ` [kernel-hardening] " Ard Biesheuvel
2017-08-21 10:37 ` Mark Rutland
2017-08-21 10:39 ` Ard Biesheuvel
2017-08-14 12:54 ` [kernel-hardening] [PATCH 30/30] efi/libstub: arm: implement KASLR Ard Biesheuvel
2017-08-14 15:30 ` [kernel-hardening] Re: [PATCH 00/30] implement KASLR for ARM Arnd Bergmann
2017-08-14 15:49 ` Ard Biesheuvel
2017-08-14 16:03 ` Arnd Bergmann
2017-08-14 16:28 ` Nicolas Pitre
2017-08-14 17:28 ` Ard Biesheuvel
2017-08-14 18:01 ` Nicolas Pitre
2017-08-14 18:08 ` Ard Biesheuvel
2017-08-14 16:16 ` Nicolas Pitre
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