[Bug ld/3015] New: -z relro by default causes testsuite failures

[meissner at suse dot de]

I enabled -z relro by default (link_info.relro = TRUE; in ldmain.c) 
 
This causes some of the testcases in ld to fail: 
 
FAIL: strip -z max-page-size=0x200000 (maxpage1) 
FAIL: strip -z max-page-size=0x200000 -z common-page-size=0x100000 (maxpage1) 
FAIL: strip -z max-page-size=0x100000 (maxpage1) 
FAIL: strip -z max-page-size=0x100000 -z common-page-size=0x1000 (maxpage1) 
FAIL: strip  (maxpage1) 
FAIL: objcopy  (maxpage1) 
FAIL: objcopy  (tbss1) 
FAIL: objcopy -shared (tbss1) 
FAIL: objcopy -z max-page-size=0x100000 (tbss1) 
FAIL: objcopy -z max-page-size=0x100000 -z common-page-size=0x1000 (tbss1) 
FAIL: objcopy  (tdata1) 
FAIL: objcopy -shared (tdata1) 
FAIL: objcopy -z max-page-size=0x100000 (tdata1) 
FAIL: objcopy -z max-page-size=0x100000 -z common-page-size=0x1000 (tdata1) 
FAIL: objcopy  (tbss2) 
FAIL: objcopy -z max-page-size=0x100000 (tbss2) 
FAIL: objcopy -z max-page-size=0x100000 -z common-page-size=0x1000 (tbss2) 
FAIL: objcopy -z max-page-size=0x100000 (tdata2) 
FAIL: objcopy  (tdata2) 
FAIL: objcopy -shared (tdata2) 
FAIL: objcopy -z max-page-size=0x100000 -z common-page-size=0x1000 (tdata2) 
 
 
The problem with those testcase it, that ld generates 
a PT_NULL section which is discard by strip and objcopy: 
 
--- tmpdir/maxpage1.exp 2006-08-09 06:10:42.000000000 +0000 
+++ tmpdir/maxpage1.out 2006-08-09 06:10:42.000000000 +0000 
@@ -1,16 +1,14 @@ 
  
 Elf file type is EXEC (Executable file) 
 Entry point 0x10000094 
-There are 3 program headers, starting at offset 52 
+There are 2 program headers, starting at offset 52 
  
 Program Headers: 
   Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align 
   LOAD           0x000000 0x10000000 0x10000000 0x00098 0x00098 R E 0x10000 
   LOAD           0x001000 0x10011000 0x10011000 0x00004 0x00004 RW  0x10000 
-  NULL           0x000000 0x00000000 0x00000000 0x00000 0x00000     0 
  
  Section to Segment mapping: 
   Segment Sections... 
    00     .text  
    01     .data  
-   02      
 
 
The PT_NULL section is generated by 
assign_file_positions_for_non_load_sections(). 
 
ld should probably not emit PT_NULL sections.

-- 
           Summary: -z relro by default causes testsuite failures
           Product: binutils
           Version: 2.17
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: meissner at suse dot de
                CC: bug-binutils at gnu dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=3015

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