Fangrui Song 70685fb621 riscv: vdso: Exclude .rodata from the PT_DYNAMIC segment ...

[ Upstream commit e0eb1b6b0c ]

.rodata is implicitly included in the PT_DYNAMIC segment due to
inheriting the segment of the preceding .dynamic section (in both GNU ld
and LLD).  When the .rodata section's size is not a multiple of 16
bytes on riscv64, llvm-readelf will report a "PT_DYNAMIC dynamic table
is invalid" warning.  Note: in the presence of the .dynamic section, GNU
readelf and llvm-readelf's -d option decodes the dynamic section using
the section.

This issue arose after commit 8f8c1ff879
("riscv: vdso.lds.S: remove hardcoded 0x800 .text start addr"), which
placed .rodata directly after .dynamic by removing .eh_frame.

This patch resolves the implicit inclusion into PT_DYNAMIC by explicitly
specifying the :text output section phdr.

Reported-by: Nathan Chancellor <nathan@kernel.org>
Closes: https://github.com/ClangBuiltLinux/linux/issues/2093
Signed-off-by: Fangrui Song <i@maskray.me>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20250602-riscv-vdso-v1-1-0620cf63cff0@maskray.me
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-07-17 18:37:22 +02:00

..

.gitignore

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flush_icache.S

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gen_vdso_offsets.sh

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getcpu.S

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hwprobe.c

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Makefile

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note.S

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rt_sigreturn.S

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sys_hwprobe.S

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vdso.lds.S

riscv: vdso: Exclude .rodata from the PT_DYNAMIC segment

2025-07-17 18:37:22 +02:00

vdso.S

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vgettimeofday.c

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