| Message ID | 20220630153121.1317045-2-nathan@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: vdso32: Small fixes for ld.lld 11 and CONFIG_DEBUG_INFO | expand |
On Thu, Jun 30, 2022 at 08:31:20AM -0700, Nathan Chancellor wrote: > When building the 32-bit vDSO after commit 5c4fb60816ea ("arm64: vdso32: > add ARM.exidx* sections"), ld.lld 11 fails to link: > > ld.lld: error: could not allocate headers > ld.lld: error: unable to place section .text at file offset [0x2A0, 0xBB1]; check your linker script for overflows > ld.lld: error: unable to place section .comment at file offset [0xBB2, 0xC8A]; check your linker script for overflows > ld.lld: error: unable to place section .symtab at file offset [0xC8C, 0xE0B]; check your linker script for overflows > ld.lld: error: unable to place section .strtab at file offset [0xE0C, 0xF1C]; check your linker script for overflows > ld.lld: error: unable to place section .shstrtab at file offset [0xF1D, 0xFAA]; check your linker script for overflows > ld.lld: error: section .ARM.exidx file range overlaps with .hash > >>> .ARM.exidx range is [0x90, 0xCF] > >>> .hash range is [0xB4, 0xE3] > > ld.lld: error: section .hash file range overlaps with .ARM.attributes > >>> .hash range is [0xB4, 0xE3] > >>> .ARM.attributes range is [0xD0, 0x10B] > > ld.lld: error: section .ARM.attributes file range overlaps with .dynsym > >>> .ARM.attributes range is [0xD0, 0x10B] > >>> .dynsym range is [0xE4, 0x133] > > ld.lld: error: section .ARM.exidx virtual address range overlaps with .hash > >>> .ARM.exidx range is [0x90, 0xCF] > >>> .hash range is [0xB4, 0xE3] > > ld.lld: error: section .ARM.exidx load address range overlaps with .hash > >>> .ARM.exidx range is [0x90, 0xCF] > >>> .hash range is [0xB4, 0xE3] > > This was fixed in ld.lld 12 with a change to match GNU ld's semantics of > placing non-SHF_ALLOC sections after SHF_ALLOC sections. > > To workaround this issue, move the .ARM.exidx section before the > .comment, .symtab, .strtab, and .shstrtab sections (ELF_DETAILS) so that > those sections remain contiguous with the .ARM.attributes section. > > Fixes: 5c4fb60816ea ("arm64: vdso32: add ARM.exidx* sections") This should have been included to point out the exact commit that fixed this in ld.lld, I can resend if necessary (since I also screwed up the patches@lists.linux.dev domain...) Link: https://github.com/llvm/llvm-project/commit/ec29538af2e0886a65f479d6a533956a1c478132 > Signed-off-by: Nathan Chancellor <nathan@kernel.org> > --- > arch/arm64/kernel/vdso32/vdso.lds.S | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/kernel/vdso32/vdso.lds.S b/arch/arm64/kernel/vdso32/vdso.lds.S > index 6e67a6524d58..c25bed8e6df1 100644 > --- a/arch/arm64/kernel/vdso32/vdso.lds.S > +++ b/arch/arm64/kernel/vdso32/vdso.lds.S > @@ -56,8 +56,8 @@ SECTIONS > > .rel.dyn : { *(.rel*) } > > - ELF_DETAILS > .ARM.exidx : { *(.ARM.exidx*) } > + ELF_DETAILS > .ARM.attributes 0 : { *(.ARM.attributes) } > > /DISCARD/ : { > -- > 2.37.0 >
diff --git a/arch/arm64/kernel/vdso32/vdso.lds.S b/arch/arm64/kernel/vdso32/vdso.lds.S index 6e67a6524d58..c25bed8e6df1 100644 --- a/arch/arm64/kernel/vdso32/vdso.lds.S +++ b/arch/arm64/kernel/vdso32/vdso.lds.S @@ -56,8 +56,8 @@ SECTIONS .rel.dyn : { *(.rel*) } - ELF_DETAILS .ARM.exidx : { *(.ARM.exidx*) } + ELF_DETAILS .ARM.attributes 0 : { *(.ARM.attributes) } /DISCARD/ : {
When building the 32-bit vDSO after commit 5c4fb60816ea ("arm64: vdso32: add ARM.exidx* sections"), ld.lld 11 fails to link: ld.lld: error: could not allocate headers ld.lld: error: unable to place section .text at file offset [0x2A0, 0xBB1]; check your linker script for overflows ld.lld: error: unable to place section .comment at file offset [0xBB2, 0xC8A]; check your linker script for overflows ld.lld: error: unable to place section .symtab at file offset [0xC8C, 0xE0B]; check your linker script for overflows ld.lld: error: unable to place section .strtab at file offset [0xE0C, 0xF1C]; check your linker script for overflows ld.lld: error: unable to place section .shstrtab at file offset [0xF1D, 0xFAA]; check your linker script for overflows ld.lld: error: section .ARM.exidx file range overlaps with .hash >>> .ARM.exidx range is [0x90, 0xCF] >>> .hash range is [0xB4, 0xE3] ld.lld: error: section .hash file range overlaps with .ARM.attributes >>> .hash range is [0xB4, 0xE3] >>> .ARM.attributes range is [0xD0, 0x10B] ld.lld: error: section .ARM.attributes file range overlaps with .dynsym >>> .ARM.attributes range is [0xD0, 0x10B] >>> .dynsym range is [0xE4, 0x133] ld.lld: error: section .ARM.exidx virtual address range overlaps with .hash >>> .ARM.exidx range is [0x90, 0xCF] >>> .hash range is [0xB4, 0xE3] ld.lld: error: section .ARM.exidx load address range overlaps with .hash >>> .ARM.exidx range is [0x90, 0xCF] >>> .hash range is [0xB4, 0xE3] This was fixed in ld.lld 12 with a change to match GNU ld's semantics of placing non-SHF_ALLOC sections after SHF_ALLOC sections. To workaround this issue, move the .ARM.exidx section before the .comment, .symtab, .strtab, and .shstrtab sections (ELF_DETAILS) so that those sections remain contiguous with the .ARM.attributes section. Fixes: 5c4fb60816ea ("arm64: vdso32: add ARM.exidx* sections") Signed-off-by: Nathan Chancellor <nathan@kernel.org> --- arch/arm64/kernel/vdso32/vdso.lds.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)