From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
To: Rosen Penev <rosenp@gmail.com>
Cc: linux-mips@vger.kernel.org, Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Bill Wendling <morbo@google.com>,
Justin Stitt <justinstitt@google.com>,
open list <linux-kernel@vger.kernel.org>,
"open list:CLANG/LLVM BUILD SUPPORT:Keyword:b(?i:clang|llvm)b"
<llvm@lists.linux.dev>
Subject: Re: [PATCH] MIPS: boot: compressed: place .rodata.* and discard .MIPS.abiflags
Date: Thu, 5 Nov 2026 16:24:21 +0100 [thread overview]
Message-ID: <auyfpUxm9KPmBXO8@alpha.franken.de> (raw)
In-Reply-To: <20261009232857.655265-1-rosenp@gmail.com>
On Fri, Oct 09, 2026 at 04:28:57PM -0700, Rosen Penev wrote:
> The decompressor linker script only collects .rodata. Clang emits the
> decompressor's strings in .rodata.str1.1 and also produces a
> .MIPS.abiflags section. GNU ld places such orphans next to similar
> sections, but ld.lld puts them after .bss:
>
> [ 5] .bss NOBITS 809246c0 5346b8 402010
> [ 6] .MIPS.abiflags ... 80d266d0 9366d0 000018
> [ 7] .rodata.str1.1 PROGBITS 80d266e8 9366e8 000164
>
> This pulls the 4 MB of .bss (mostly the boot heap) into the file and
> leaves the strings beyond _end. For BCM47XX vmlinuz grows from 5.4 MB
> to 9.6 MB.
>
> Collect .rodata.* with .rodata, and discard .MIPS.abiflags and
> .gnu.attributes as arch/mips/kernel/vmlinux.lds.S does.
>
> Assisted-by: LLM
> Signed-off-by: Rosen Penev <rosenp@gmail.com>
> ---
> arch/mips/boot/compressed/ld.script | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/arch/mips/boot/compressed/ld.script b/arch/mips/boot/compressed/ld.script
> index 0ebb667274d6..c45be18c6f0d 100644
> --- a/arch/mips/boot/compressed/ld.script
> +++ b/arch/mips/boot/compressed/ld.script
> @@ -17,7 +17,7 @@ SECTIONS
> /* . = VMLINUZ_LOAD_ADDRESS; */
> .text : {
> *(.text)
> - *(.rodata)
> + *(.rodata .rodata.*)
> }: text
> /* End of text section */
>
> @@ -50,7 +50,9 @@ SECTIONS
>
> /* Sections to be discarded */
> /DISCARD/ : {
> + *(.MIPS.abiflags)
> *(.MIPS.options)
> + *(.gnu.attributes)
> *(.options)
> *(.pdr)
> *(.reginfo)
> --
> 2.56.0
applied to mips-fixes
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
prev parent reply other threads:[~2026-11-05 15:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-09 23:28 Rosen Penev
2026-11-05 15:24 ` Thomas Bogendoerfer [this message]
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