https://sourceware.org/bugzilla/show_bug.cgi?id=27530
Bug ID: 27530
Summary: gas: Support .reloc ., 0, target
Product: binutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: i at maskray dot me
Target Milestone: ---
R_*_NONE relocation types do not modify the location but can be used to
indicate a dependency between two sections. For example, ARM EHABI uses
R_ARM_NONE from an exception handling table section to the required personality
routine.
In assembly, we have to spell the relocation type name. So to support multiple
architectures, we have to dispatch on architecture macros, e.g.
#if defined(__x86_64__)
asm(".reloc ., R_X86_64_NONE, target");
#elif defined(__aarch64__)
asm(".reloc ., R_AARCH64_NONE, target");
#elif defined(__ppc64__)
asm(".reloc ., R_PPC64_NONE, target");
#endif
Note that R_*_NONE is always 0 (if an arch does not do this, it is probably
finding itself trouble), so if gas support `.reloc ., 0, target`, such
dispatching will be unnecessary.
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