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[Bug libc/14376] glibc-2.16 strdup Illegal Instruction on sparc64


http://sourceware.org/bugzilla/show_bug.cgi?id=14376

--- Comment #5 from Jan Engelhardt <jengelh at inai dot de> 2012-09-17 08:23:44 UTC ---
(gdb) p strdup
$8 = {<text variable, no debug info>} 0xfffff80100099ee0 <__strdup>
(gdb) disas __strdup
Dump of assembler code for function __strdup:
=> 0xfffff80100099ee0 <+0>:     save  %sp, -176, %sp
   0xfffff80100099ee4 <+4>:     mov  %i0, %o0
   0xfffff80100099ee8 <+8>:     call  0xfffff8010009a1a0 <strlen>
   0xfffff80100099eec <+12>:    mov  %i0, %i1
   0xfffff80100099ef0 <+16>:    add  %o0, 1, %i2
   0xfffff80100099ef4 <+20>:    call  0xfffff8010026f3c0 <malloc@plt>
   0xfffff80100099ef8 <+24>:    mov  %i2, %o0
   0xfffff80100099efc <+28>:    brz,pn   %o0, 0xfffff80100099f0c <__strdup+44>
   0xfffff80100099f00 <+32>:    nop
   0xfffff80100099f04 <+36>:    call  0xfffff8010026f4a0 <_Qp_xtoq@plt+64>
   0xfffff80100099f08 <+40>:    restore  %g0, %o0, %o0
   0xfffff80100099f0c <+44>:    rett  %i7 + 8
   0xfffff80100099f10 <+48>:    clr  %o0

(gdb) p memcpy
$9 = {void *(void *, const void *, size_t)} 0x1000001f3c0 <memcpy>

Now that is odd..

/proc/XX/maps contains:

00100000-00102000 r-xp 00000000 103:40000 10387606                      
/tmp/glibc-N2.16/glibc-2.16/obj/strdup
00200000-00202000 r--p 00000000 103:40000 10387606                      
/tmp/glibc-N2.16/glibc-2.16/obj/strdup
00202000-00204000 rwxp 00002000 103:40000 10387606                      
/tmp/glibc-N2.16/glibc-2.16/obj/strdup
10000000000-10000024000 r-xp 00000000 103:40000 10381206                
/tmp/glibc-N2.16/glibc-2.16/obj/elf/ld.so
10000124000-10000126000 r--p 00024000 103:40000 10381206                
/tmp/glibc-N2.16/glibc-2.16/obj/elf/ld.so
10000126000-10000128000 rwxp 00026000 103:40000 10381206                
/tmp/glibc-N2.16/glibc-2.16/obj/elf/ld.so
7fefffde000-7ff00000000 rw-p 00000000 00:00 0                           
[stack]
fffff80100000000-fffff80100002000 rw-p 00000000 00:00 0 
fffff80100004000-fffff80100168000 r-xp 00000000 103:40000 10381208      
/tmp/glibc-N2.16/glibc-2.16/obj/libc.so
fffff80100168000-fffff80100266000 ---p 00164000 103:40000 10381208      
/tmp/glibc-N2.16/glibc-2.16/obj/libc.so
fffff80100266000-fffff8010026a000 r--p 00162000 103:40000 10381208      
/tmp/glibc-N2.16/glibc-2.16/obj/libc.so
fffff8010026a000-fffff80100272000 rwxp 00166000 103:40000 10381208      
/tmp/glibc-N2.16/glibc-2.16/obj/libc.so
fffff80100272000-fffff80100276000 rwxp 00000000 00:00 0

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