From: Ard Biesheuvel <ardb@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-efi@vger.kernel.org,
Geert Uytterhoeven <geert+renesas@glider.be>,
Nicolas Pitre <nico@fluxnic.net>,
Linus Walleij <linus.walleij@linaro.org>,
Russell King <linux@armlinux.org.uk>,
Ard Biesheuvel <ardb@kernel.org>
Subject: [PATCH 1/5] ARM: decompressor: move headroom variable out of LC0
Date: Fri, 27 Mar 2020 11:59:02 +0100 [thread overview]
Message-ID: <20200327105906.2665-2-ardb@kernel.org> (raw)
In-Reply-To: <20200327105906.2665-1-ardb@kernel.org>
Before breaking up LC0 into different pieces, move out the variable
that is already place relative (given that it subtracts 'restart' in
the expression) and so its value does not need to be added to the
runtime address of the LC0 symbol itself.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
arch/arm/boot/compressed/head.S | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index 2d2a42865b39..bb674febf640 100644
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -339,7 +339,7 @@ not_angel:
*/
mov r0, pc
cmp r0, r4
- ldrcc r0, LC0+28
+ ldrcc r0, .Lheadroom
addcc r0, r0, pc
cmpcc r4, r0
orrcc r4, r4, #1 @ remember we skipped cache_on
@@ -716,9 +716,11 @@ LC0: .word LC0 @ r1
.word _got_start @ r11
.word _got_end @ ip
.word .L_user_stack_end @ sp
- .word _end - restart + 16384 + 1024*1024
.size LC0, . - LC0
+.Lheadroom:
+ .word _end - restart + 16384 + 1024*1024
+
.Linflated_image_size_offset:
.long (input_data_end - 4) - .
--
2.17.1
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next prev parent reply other threads:[~2020-03-27 10:59 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-27 10:59 [PATCH 0/5] ARM: simplify handover from UEFI to decompressor Ard Biesheuvel
2020-03-27 10:59 ` Ard Biesheuvel [this message]
2020-03-27 13:23 ` [PATCH 1/5] ARM: decompressor: move headroom variable out of LC0 Geert Uytterhoeven
2020-03-27 13:59 ` Ard Biesheuvel
2020-03-27 10:59 ` [PATCH 2/5] ARM: decompressor: split off _edata and stack base into separate object Ard Biesheuvel
2020-03-27 13:23 ` Geert Uytterhoeven
2020-03-27 10:59 ` [PATCH 3/5] ARM: decompressor: defer loading of the contents of the LC0 structure Ard Biesheuvel
2020-03-27 13:24 ` Geert Uytterhoeven
2020-03-27 10:59 ` [PATCH 4/5] ARM: decompressor: move GOT into .data for EFI enabled builds Ard Biesheuvel
2020-03-27 10:59 ` [PATCH 5/5] ARM: decompressor: run decompressor in place if loaded via UEFI Ard Biesheuvel
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