From: Ard Biesheuvel <ardb@kernel.org>
To: linux-efi@vger.kernel.org
Cc: 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>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/5] ARM: decompressor: move headroom variable out of LC0
Date: Mon, 13 Apr 2020 18:21:31 +0200 [thread overview]
Message-ID: <20200413162135.14955-2-ardb@kernel.org> (raw)
In-Reply-To: <20200413162135.14955-1-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.
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
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
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-04-13 16:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-13 16:21 [PATCH v2 0/5] ARM: simplify handover from UEFI to decompressor Ard Biesheuvel
2020-04-13 16:21 ` Ard Biesheuvel [this message]
2020-04-13 16:21 ` [PATCH v2 2/5] ARM: decompressor: split off _edata and stack base into separate object Ard Biesheuvel
2020-04-13 16:21 ` [PATCH v2 3/5] ARM: decompressor: defer loading of the contents of the LC0 structure Ard Biesheuvel
2020-04-13 16:21 ` [PATCH v2 4/5] ARM: decompressor: move GOT into .data for EFI enabled builds Ard Biesheuvel
2020-04-13 16:21 ` [PATCH v2 5/5] ARM: decompressor: run decompressor in place if loaded via UEFI Ard Biesheuvel
2020-04-13 16:41 ` [PATCH v2 0/5] ARM: simplify handover from UEFI to decompressor Russell King - ARM Linux admin
2020-04-13 16:47 ` Ard Biesheuvel
2020-04-13 16:56 ` Nicolas Pitre
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200413162135.14955-2-ardb@kernel.org \
--to=ardb@kernel.org \
--cc=geert+renesas@glider.be \
--cc=linus.walleij@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-efi@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=nico@fluxnic.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).