[Bug binutils/855] New: objcopy creates invalid object

[schwab at suse dot de]

The fake section groups created by BFD causes objcopy to create invalid output, 
where a section has SHF_GROUP set but no groups are defined.  $ cat linkonce.s  
.section .gnu.linkonce.t.__syscall_error_3, "ax" $ as linkonce.s $ objdump -h 
a.out:     file format elf64-ia64-little  Sections: Idx Name          Size      
VMA               LMA               File off  Algn   4 __syscall_error_3 
00000000  0000000000000000  0000000000000000  00000000  2**0                   
EXCLUDE, LINK_ONCE_DISCARD   0 .text         00000000  0000000000000000  
0000000000000000  00000040  2**4                   CONTENTS, ALLOC, LOAD, 
READONLY, CODE   1 .data         00000000  0000000000000000  0000000000000000  
00000040  2**0                   CONTENTS, ALLOC, LOAD, DATA   2 .bss          
00000000  0000000000000000  0000000000000000  00000040  2**0                   
ALLOC   3 .gnu.linkonce.t.__syscall_error_3 00000000  0000000000000000  
0000000000000000  00000040  2**0                   CONTENTS, ALLOC, LOAD, 
READONLY, CODE, LINK_ONCE_DISCARD $ objcopy a.out b.out $ objdump -h b.out 
objdump: b.out: Memory exhausted $ readelf -Sg b.out There are 8 section 
headers, starting at offset 0x90:  Section Headers:   [Nr] Name              
Type             Address           Offset        Size              EntSize      
    Flags  Link  Info  Align   [ 0]                   NULL             
0000000000000000  00000000        0000000000000000  0000000000000000           
0     0     0   [ 1] .text             PROGBITS         0000000000000000  
00000040        0000000000000000  0000000000000000  AX       0     0     16   [ 
2] .data             PROGBITS         0000000000000000  00000040        
0000000000000000  0000000000000000  WA       0     0     1   [ 3] .bss          
    NOBITS           0000000000000000  00000040        0000000000000000  
0000000000000000  WA       0     0     1   [ 4] .gnu.linkonce.t._ PROGBITS      
   0000000000000000  00000040        0000000000000000  0000000000000000 AXG     
  0     0     1   [ 5] .shstrtab         STRTAB           0000000000000000  
00000040        000000000000004e  0000000000000000           0     0     1   [ 
6] .symtab           SYMTAB           0000000000000000  00000290        
0000000000000078  0000000000000018           7     5     8   [ 7] .strtab       
    STRTAB           0000000000000000  00000308        0000000000000001  
0000000000000000           0     0     1 Key to Flags:   W (write), A (alloc), 
X (execute), M (merge), S (strings)   I (info), L (link order), G (group), x 
(unknown)   O (extra OS processing required) o (OS specific), p (processor 
specific)  There are no section groups in this file.

-- 
           Summary: objcopy creates invalid object
           Product: binutils
           Version: 2.17 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: schwab at suse dot de
                CC: bug-binutils at gnu dot org,hjl at lucon dot org
GCC target triplet: ia64-*-*


http://sources.redhat.com/bugzilla/show_bug.cgi?id=855

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