#4867: ghci displays negative floats incorrectly (was: Incorrect result from
trig
functions)
-------------------------------+--------------------------------------------
Reporter: gwright | Owner: gwright
Type: bug | Status: new
Priority: high | Milestone: 7.0.2
Component: GHCi | Version: 7.0.1
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: MacOS X | Blocking:
Architecture: x86_64 (amd64) | Failure: Incorrect result at runtime
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Comment(by gwright):
Seems to be a bad relocation. In load statement,
{{{
movsd 0x281b7c(%rip),%xmm7
}}}
the memory location at %rip + 0x281b7c is inside the `__text` section, not
the `__const` section. The register `$xmm7` is therefore loaded with 8
bytes of machine code, not the expected constant data. (This does explain
why the results are repeatable; we're not loading from uninitialized
memory.)
I'm adding more debugging instruction so I can get a complete
understanding of what the linker is doing.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4867#comment:20>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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