From: Helge Deller <deller@gmx.de>
To: Sven Schnelle <svens@stackframe.org>
Cc: linux-parisc@vger.kernel.org
Subject: Re: [PATCH] parisc: strip debug information when building compressed images
Date: Wed, 31 Jul 2019 21:28:35 +0200 [thread overview]
Message-ID: <20190731192835.GA14352@ls3530.fritz.box> (raw)
In-Reply-To: <20190731171923.24155-1-svens@stackframe.org>
* Sven Schnelle <svens@stackframe.org>:
> When compiling the kernel with debug information i got the following error:
>
> hppa-linux-gnu-ld: section .text LMA [0000000000e78000,0000000000e7b41f] overlaps section .rodata.compressed LMA [00000000000e0078,00000000015ad43d]
> make[3]: *** [/home/svens/parisc-linux/src/arch/parisc/boot/compressed/Makefile:28: arch/parisc/boot/compressed/vmlinux] Error 1
> make[2]: *** [/home/svens/parisc-linux/src/arch/parisc/boot/Makefile:17: arch/parisc/boot/compressed/vmlinux] Error 2
> make[2]: Target 'arch/parisc/boot/bzImage' not remade because of errors.
>
> While this might also be fixed by adjusting the linker script, i think we
> should strip the debug information when generating the compressed image. This
> reduces the size of vmlinuz/lifimage from ~69MB to 6.6MB when full debug
> information is enabled.
I think keeping debug info is good.
Can you test this patch instead?
It converts a 141MB vmlinux boot file (with debug info) to a 32M vmlinuz for me.
Ideally I would prefer something like
. = MIN_OR_HIGHER_THAN_CURRENT_ADDR((SZ_end - SZparisc_kernel_start + KERNEL_BINARY_TEXT_START));
to avoid the ifdef, but I'm missing the linker script expert knowledge...
Helge
------------------------
[PATCH] parisc: Allow building a compressed vmlinuz with CONFIG_DEBUG_INFO enabled.
Signed-off-by: Helge Deller <deller@gmx.de>
diff --git a/arch/parisc/boot/compressed/vmlinux.lds.S b/arch/parisc/boot/compressed/vmlinux.lds.S
index bfd7872739a3..dac000ec3861 100644
--- a/arch/parisc/boot/compressed/vmlinux.lds.S
+++ b/arch/parisc/boot/compressed/vmlinux.lds.S
@@ -49,7 +49,10 @@ SECTIONS
}
/* bootloader code and data starts behind area of extracted kernel */
+#if !defined(CONFIG_DEBUG_INFO)
+ /* ensure at least max address when compiled without debug info: */
. = (SZ_end - SZparisc_kernel_start + KERNEL_BINARY_TEXT_START);
+#endif
/* align on next page boundary */
. = ALIGN(4096);
next prev parent reply other threads:[~2019-07-31 19:28 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-31 17:19 [PATCH] parisc: strip debug information when building compressed images Sven Schnelle
2019-07-31 19:28 ` Helge Deller [this message]
2019-07-31 19:36 ` Helge Deller
2019-07-31 19:55 ` Sven Schnelle
2019-07-31 20:07 ` Helge Deller
2019-07-31 20:19 ` Sven Schnelle
2019-07-31 19:37 ` James Bottomley
2019-07-31 19:40 ` Helge Deller
2019-07-31 19:45 ` James Bottomley
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