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[Bug gas/27169] i386: Emit R_386_PLT32 instead of R_386_PC32 for `call/j


From: i at maskray dot me
Subject: [Bug gas/27169] i386: Emit R_386_PLT32 instead of R_386_PC32 for `call/jmp foo`
Date: Sun, 10 Jan 2021 18:05:08 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=27169

--- Comment #2 from Fangrui Song <i at maskray dot me> ---
(In reply to H.J. Lu from comment #1)
> Since i386 doesn't have IP-relative addressing, non-PIC PLT is different
> from PIC PLT.  Using R_386_PLT32 for "call/jmp foo" isn't appreciate.

I know that this is a convention using R_386_PC32 for non-PIC PLT and
R_386_PLT32. It is artificial and assembler/linker/ld.so do not need this
convention for interop.

On most other architectures branch relocation types are distinguishable from
address taken relocation types (direct access).

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