Messages in this thread Patch in this message | | | From | Jason Baron <> | Subject | [PATCH v3 4/7] tile: support static_key usage in non-module __exit sections | Date | Wed, 6 Jul 2016 17:42:33 -0400 |
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From: Chris Metcalf <cmetcalf@mellanox.com>
Previously, all the __exit sections were just dropped by the link phase. However, if there are static_key (jump label) constructs in __exit sections that are not modules, the link fails with the message:
`.exit.text' referenced in section `__jump_table' of xxx.o: defined in discarded section `.exit.text' of xxx.o
Support this usage by keeping the .exit.text sections in the final image if JUMP_LABEL is defined, then discarding them once initialization is complete.
Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com> Signed-off-by: Jason Baron <jbaron@akamai.com> --- arch/tile/kernel/vmlinux.lds.S | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/arch/tile/kernel/vmlinux.lds.S b/arch/tile/kernel/vmlinux.lds.S index 378f5d8d1ec8..9d449caf8910 100644 --- a/arch/tile/kernel/vmlinux.lds.S +++ b/arch/tile/kernel/vmlinux.lds.S @@ -60,6 +60,18 @@ SECTIONS /* "Init" is divided into two areas with very different virtual addresses. */ INIT_TEXT_SECTION(PAGE_SIZE) + /* + * Some things, like the __jump_table, may contain symbol references + * to __exit text, so include such text in the final image if so. + * In that case we also override the _einittext from INIT_TEXT_SECTION. + */ +#ifdef CONFIG_JUMP_LABEL + .exit.text : { + EXIT_TEXT + _einittext = .; + } +#endif + /* Now we skip back to PAGE_OFFSET for the data. */ . = (. - TEXT_OFFSET + PAGE_OFFSET); #undef LOAD_OFFSET -- 2.6.1
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