Re: lib/49444: ++ exception unwinding broken on BE8 arm

[Martin Husemann <martin%duskware.de@localhost>]

The following reply was made to PR lib/49444; it has been noted by GNATS.

From: Martin Husemann <martin%duskware.de@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: lib/49444: ++ exception unwinding broken on BE8 arm
Date: Fri, 23 Jan 2015 21:16:01 +0100

 So readelf produces clearer output (objdump is broken?)
 
 The pc in question is coverd by this:
 
 00000b8c 00000030 00000830 FDE cie=00000360 pc=00024528..00024824
   Augmentation data:     00 02 7e a8
 
   DW_CFA_advance_loc: 4 to 0002452c
   DW_CFA_def_cfa_register: r12
   DW_CFA_advance_loc: 4 to 00024530
   DW_CFA_offset: r4 at cfa-44
   DW_CFA_offset: r5 at cfa-40
   DW_CFA_offset: r6 at cfa-36
   DW_CFA_offset: r7 at cfa-32
   DW_CFA_offset: r8 at cfa-28
   DW_CFA_offset: r9 at cfa-24
   DW_CFA_offset: r10 at cfa-20
   DW_CFA_offset: r11 at cfa-16
   DW_CFA_offset: r13 at cfa-12
   DW_CFA_offset: r14 at cfa-8
   DW_CFA_advance_loc: 4 to 00024534
   DW_CFA_def_cfa: r11 ofs 4
   DW_CFA_nop
   DW_CFA_nop
   DW_CFA_nop
 
 and
 
 00000b8c 00000030 00000830 FDE cie=00000360 pc=00024528..00024824
    LOC   CFA      r4    r5    r6    r7    r8    r9    r10   r11   r13   ra      
 00024528 r13+0    u     u     u     u     u     u     u     u     u     u     
 0002452c r12+0    u     u     u     u     u     u     u     u     u     u     
 00024530 r12+0    c-44  c-40  c-36  c-32  c-28  c-24  c-20  c-16  c-12  c-8   
 00024534 r11+4    c-44  c-40  c-36  c-32  c-28  c-24  c-20  c-16  c-12  c-8   
 
 which matches the function:
 (gdb) x/i 0x00024528
    0x24528 <_ZN5tools4text7to_typeIxEET_RKSs>:  mov     r12, sp
 (gdb) x/i 0x00024820
    0x24820 <_ZN5tools4text7to_typeIxEET_RKSs+760>:      
     stmgt       pc, {r8, r9}    ; <UNPREDICTABLE>
 
 
 So dwarf output looks ok to me, but the rb tree node is broken?
 
 Martin