From: ard.biesheuvel@linaro.org (Ard Biesheuvel)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 23/29] ARM: kernel: refer to swapper_pg_dir via its symbol
Date: Sun, 3 Sep 2017 13:07:51 +0100 [thread overview]
Message-ID: <20170903120757.14968-24-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <20170903120757.14968-1-ard.biesheuvel@linaro.org>
The location of swapper_pg_dir is relative to the kernel, not to
PAGE_OFFSET or PHYS_OFFSET. So define the symbol relative to the
start of the kernel image, and refer to it via its name.
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
arch/arm/kernel/head.S | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 5d685e86148c..71bc0d037bc9 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -48,14 +48,6 @@
#define PMD_ORDER 2
#endif
- .globl swapper_pg_dir
- .equ swapper_pg_dir, KERNEL_RAM_VADDR - PG_DIR_SIZE
-
- .macro pgtbl, rd, phys
- add \rd, \phys, #TEXT_OFFSET
- sub \rd, \rd, #PG_DIR_SIZE
- .endm
-
/*
* Kernel startup entry point.
* ---------------------------
@@ -77,6 +69,9 @@
.arm
__HEAD
+ .globl swapper_pg_dir
+ .equ swapper_pg_dir, . - PG_DIR_SIZE
+
ENTRY(stext)
ARM_BE8(setend be ) @ ensure we are in BE8 mode
@@ -172,7 +167,7 @@ ENDPROC(stext)
* r4 = physical page table address
*/
__create_page_tables:
- pgtbl r4, r8 @ page table address
+ adr_l r4, swapper_pg_dir @ page table address
/*
* Clear the swapper page table
--
2.11.0
next prev parent reply other threads:[~2017-09-03 12:07 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-03 12:07 [PATCH v2 00/29] implement KASLR for ARM Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 01/29] net/core: work around section mismatch warning for ptp_classifier Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 02/29] asm-generic: add .data.rel.ro sections to __ro_after_init Ard Biesheuvel
2017-09-04 15:59 ` Nicolas Pitre
2017-09-04 17:09 ` Kees Cook
2017-09-03 12:07 ` [PATCH v2 03/29] ARM: assembler: introduce adr_l, ldr_l and str_l macros Ard Biesheuvel
2017-09-04 16:05 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 04/29] ARM: head-common.S: use PC-relative insn sequence for __proc_info Ard Biesheuvel
2017-09-04 16:06 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 05/29] ARM: head-common.S: use PC-relative insn sequence for idmap creation Ard Biesheuvel
2017-09-04 16:08 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 06/29] ARM: head.S: use PC-relative insn sequence for secondary_data Ard Biesheuvel
2017-09-04 16:09 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 07/29] ARM: kernel: use relative references for UP/SMP alternatives Ard Biesheuvel
2017-09-04 16:15 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 08/29] ARM: head: use PC-relative insn sequence for __smp_alt Ard Biesheuvel
2017-09-04 16:19 ` Nicolas Pitre
2017-09-04 16:20 ` Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 09/29] ARM: sleep.S: use PC-relative insn sequence for sleep_save_sp/mpidr_hash Ard Biesheuvel
2017-09-04 16:20 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 10/29] ARM: head.S: use PC-relative insn sequences for __fixup_pv_table Ard Biesheuvel
2017-09-04 16:47 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 11/29] ARM: head.S: use PC relative insn sequence to calculate PHYS_OFFSET Ard Biesheuvel
2017-09-04 16:50 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 12/29] ARM: kvm: replace open coded VA->PA calculations with adr_l call Ard Biesheuvel
2017-09-04 16:57 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 13/29] arm-soc: exynos: replace open coded VA->PA conversions Ard Biesheuvel
2017-09-04 16:59 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 14/29] arm-soc: mvebu: replace open coded VA->PA conversion Ard Biesheuvel
2017-09-04 17:00 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 15/29] arm-soc: various: replace open coded VA->PA calculation of pen_release Ard Biesheuvel
2017-09-04 17:01 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 16/29] ARM: kernel: switch to relative exception tables Ard Biesheuvel
2017-09-04 17:17 ` Nicolas Pitre
2017-09-04 17:30 ` Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 17/29] ARM: kernel: use relative phys-to-virt patch tables Ard Biesheuvel
2017-09-04 18:03 ` Nicolas Pitre
2017-09-04 19:09 ` Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 18/29] arm-soc: tegra: make sleep asm code runtime relocatable Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 19/29] ARM: kernel: make vmlinux buildable as a PIE executable Ard Biesheuvel
2017-09-04 18:11 ` Nicolas Pitre
2017-09-04 19:10 ` Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 20/29] ARM: kernel: use PC-relative symbol references in MMU switch code Ard Biesheuvel
2017-09-04 18:15 ` Nicolas Pitre
2017-09-04 19:14 ` Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 21/29] ARM: kernel: use PC relative symbol references in suspend/resume code Ard Biesheuvel
2017-09-04 18:24 ` Nicolas Pitre
2017-09-04 19:17 ` Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 22/29] ARM: mm: export default vmalloc base address Ard Biesheuvel
2017-09-04 18:25 ` Nicolas Pitre
2017-09-03 12:07 ` Ard Biesheuvel [this message]
2017-09-04 18:30 ` [PATCH v2 23/29] ARM: kernel: refer to swapper_pg_dir via its symbol Nicolas Pitre
2017-09-04 19:26 ` Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 24/29] ARM: kernel: implement randomization of the kernel load address Ard Biesheuvel
2017-09-04 18:44 ` Nicolas Pitre
2017-09-04 19:29 ` Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 25/29] ARM: decompressor: explicitly map decompressor binary cacheable Ard Biesheuvel
2017-09-04 18:47 ` Nicolas Pitre
2017-09-03 12:07 ` [PATCH v2 26/29] ARM: decompressor: add KASLR support Ard Biesheuvel
2017-09-04 18:53 ` Nicolas Pitre
2017-09-04 19:33 ` Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 27/29] efi/libstub: add 'max' parameter to efi_random_alloc() Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 28/29] efi/libstub: check for vmalloc= command line argument Ard Biesheuvel
2017-09-03 12:07 ` [PATCH v2 29/29] efi/libstub: arm: implement KASLR Ard Biesheuvel
2017-09-05 16:45 ` [PATCH v2 00/29] implement KASLR for ARM Tony Lindgren
2017-09-05 16:48 ` Ard Biesheuvel
2017-09-05 19:37 ` Tony Lindgren
2017-09-05 19:42 ` Ard Biesheuvel
2017-09-05 21:27 ` Tony Lindgren
2017-09-05 21:31 ` Ard Biesheuvel
2017-09-06 10:40 ` Ard Biesheuvel
2017-09-06 16:22 ` Tony Lindgren
2017-09-06 16:25 ` Ard Biesheuvel
2017-09-06 16:31 ` Tony Lindgren
2017-09-06 16:35 ` Ard Biesheuvel
2017-09-06 17:12 ` Tony Lindgren
2017-09-06 17:30 ` Ard Biesheuvel
2017-09-06 17:53 ` Tony Lindgren
2017-09-06 18:04 ` Ard Biesheuvel
2017-09-06 18:22 ` Tony Lindgren
2017-09-06 18:25 ` Ard Biesheuvel
2017-09-06 20:08 ` Tony Lindgren
2017-09-12 6:51 ` Ard Biesheuvel
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