[Bug translator/2438] Can't resolve $fd argument for sys_readv and sys_writev on ppc64

["aoliva at sourceware dot org" <sourceware-bugzilla@sourceware.org>]

------- Additional Comments From aoliva at sourceware dot org  2006-04-15 05:45 -------
What does the debug info for these functions look like?  I suspect this may be
fixed in U4, with the backport of variable tracking and location lists for
variables, but I don't have easy access to a RHEL4 U3 ppc64 box to compare with
it.  Also, I don't know whether stap actually supports location lists.  Here's
what I get from readelf -w, using GCC trunk:

 <1><70df3d>: Abbrev Number: 78 (DW_TAG_subprogram)
     DW_AT_external    : 1
     DW_AT_name        : (indirect string, offset: 0x41d64): sys_readv
     DW_AT_decl_file   : 1
     DW_AT_decl_line   : 601
     DW_AT_prototyped  : 1
     DW_AT_type        : <70440b>
     DW_AT_low_pc      : 0xc0000000000c783c
     DW_AT_high_pc     : 0xc0000000000c7900
     DW_AT_frame_base  : 0x111a7c       (location list)
     DW_AT_sibling     : <70e01a>
 <2><70df63>: Abbrev Number: 67 (DW_TAG_formal_parameter)
     DW_AT_name        : fd
     DW_AT_decl_file   : 1
     DW_AT_decl_line   : 600
     DW_AT_type        : <704124>
     DW_AT_location    : 0x111ab4       (location list)

    00111ab4 c0000000000c783c c0000000000c784c (DW_OP_reg3)
    00111ab4 c0000000000c7850 c0000000000c7868 (DW_OP_reg3)
    00111ab4 <End of list>

RHEL4 U4's GCC generates equivalent debug info.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aoliva at sourceware dot org
             Status|NEW                         |WAITING


http://sourceware.org/bugzilla/show_bug.cgi?id=2438

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