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![Ilie Halip](/assets/img/avatar_default.png)
When using GCC as compiler and LLVM's lld as linker, linking setup.elf fails: LD arch/x86/boot/setup.elf ld.lld: error: init sections too big! This happens because GCC generates .eh_frame sections for most of the files in that directory, then ld.lld places the merged section before __end_init, triggering an assert in the linker script. Fix this by discarding the .eh_frame sections, as suggested by Boris. The kernel proper linker script discards them too. [ bp: Going back in history, 64-bit kernel proper has been discarding .eh_frame since 2002: commit acca80acefe20420e69561cf55be64f16c34ea97 Author: Andi Kleen <ak@muc.de> Date: Tue Oct 29 23:54:35 2002 -0800 [PATCH] x86-64 updates for 2.5.44 ... - Remove the .eh_frame on linking. This saves several hundred KB in the bzImage ] Suggested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Ilie Halip <ilie.halip@gmail.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com Cc: Andy Lutomirski <luto@kernel.org> Cc: clang-built-linux@googlegroups.com Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86-ml <x86@kernel.org> Link: https://lore.kernel.org/lkml/20191118175223.GM6363@zn.tnic/ Link: https://github.com/ClangBuiltLinux/linux/issues/760 Link: https://lkml.kernel.org/r/20191126144545.19354-1-ilie.halip@gmail.com
67 lines
1.1 KiB
Text
67 lines
1.1 KiB
Text
/*
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* setup.ld
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*
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* Linker script for the i386 setup code
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*/
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OUTPUT_FORMAT("elf32-i386")
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OUTPUT_ARCH(i386)
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ENTRY(_start)
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SECTIONS
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{
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. = 0;
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.bstext : { *(.bstext) }
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.bsdata : { *(.bsdata) }
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. = 495;
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.header : { *(.header) }
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.entrytext : { *(.entrytext) }
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.inittext : { *(.inittext) }
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.initdata : { *(.initdata) }
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__end_init = .;
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.text : { *(.text) }
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.text32 : { *(.text32) }
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. = ALIGN(16);
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.rodata : { *(.rodata*) }
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.videocards : {
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video_cards = .;
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*(.videocards)
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video_cards_end = .;
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}
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. = ALIGN(16);
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.data : { *(.data*) }
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.signature : {
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setup_sig = .;
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LONG(0x5a5aaa55)
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}
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. = ALIGN(16);
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.bss :
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{
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__bss_start = .;
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*(.bss)
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__bss_end = .;
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}
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. = ALIGN(16);
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_end = .;
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/DISCARD/ : {
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*(.eh_frame)
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*(.note*)
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}
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/*
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* The ASSERT() sink to . is intentional, for binutils 2.14 compatibility:
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*/
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. = ASSERT(_end <= 0x8000, "Setup too big!");
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. = ASSERT(hdr == 0x1f1, "The setup header has the wrong offset!");
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/* Necessary for the very-old-loader check to work... */
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. = ASSERT(__end_init <= 5*512, "init sections too big!");
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}
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