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Last Comment Bug 703842 - Binary ends up with a R_SPARC_WDISP22 relocation that doesn't support
: Binary ends up with a R_SPARC_WDISP22 relocation that doesn't support
Product: Core
Classification: Components
Component: JavaScript Engine (show other bugs)
: Trunk
: Sun Linux
: -- normal (vote)
: mozilla11
Assigned To: Mike Hommey [:glandium]
: Jason Orendorff [:jorendorff]
Depends on:
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Reported: 2011-11-19 00:36 PST by Mike Hommey [:glandium]
Modified: 2012-02-01 13:57 PST (History)
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Avoid R_SPARC_WDISP22 relocation in TrampolineSparc.s (1.35 KB, patch)
2011-11-19 00:38 PST, Mike Hommey [:glandium]
bhackett1024: review+
Details | Diff | Splinter Review

Description Mike Hommey [:glandium] 2011-11-19 00:36:57 PST
The message looks like the following:
error while loading shared libraries: unexpected reloc type 0x08

Reloc type 0x08 is R_SPARC_WDISP22

This relocation comes from the ba instruction in the following assembly from methodjit/TrampolineSparc.s:

.global JaegerInterpolineScripted
.type   JaegerInterpolineScripted, #function
    ld      [%l0 + 0x10], %l0                        /* Load f->prev_ */
    st      %l0, [%fp - 36]                          /* Update f->regs->fp_ */
    ba     JaegerInterpoline

Replacing ba with call works, but then it goes through the PLT, which is silly.
Another solution that works is to replace JaegerInterpoline with a new label at the same location, but which is not defined as a function.
Comment 1 Mike Hommey [:glandium] 2011-11-19 00:38:35 PST
Created attachment 575633 [details] [diff] [review]
Avoid R_SPARC_WDISP22 relocation in TrampolineSparc.s
Comment 3 Ed Morley [:emorley] 2011-12-02 12:06:04 PST

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