[Bug ld/10259] New: ld generates bad long branch stubs

[danglin at gcc dot gnu dot org]

The following change to binutils breaks GCC bootstrap in stage1:

2009-05-22  Julian Brown  <address@hidden>

        * elf32-arm.c (THUMB16_BCOND_INSN, THUMB32_INSN, THUMB32_B_INSN): New
        macros.

This is the error reported in my build log:

...
checking for armv5tejl-unknown-linux-gnueabi-
gcc... /home/dave/gnu/gcc/objdir/./gcc/xgcc -
B/home/dave/gnu/gcc/objdir/./gcc/ -B/home/dave/opt/gnu/gcc/gcc-4.5.0/armv5tejl-
unknown-linux-gnueabi/bin/ -B/home/dave/opt/gnu/gcc/gcc-4.5.0/armv5tejl-
unknown-linux-gnueabi/lib/ -isystem /home/dave/opt/gnu/gcc/gcc-4.5.0/armv5tejl-
unknown-linux-gnueabi/include -isystem /home/dave/opt/gnu/gcc/gcc-
4.5.0/armv5tejl-unknown-linux-gnueabi/sys-include
checking for suffix of object files... configure: error: in 
`/home/dave/gnu/gcc/objdir/armv5tejl-unknown-linux-gnueabi/libgcc':
configure: error: cannot compute suffix of object files: cannot compile
See `config.log' for more details.

With the trivial program,

int
main ()
{
  return 0;
}

cc1 generates a SEGV here:

(gdb) r
Starting program: /home/dave/gnu/gcc/objdir/gcc/cc1 -
iprefix /home/dave/gnu/gcc/objdir/gcc/../lib/gcc/armv5tejl-unknown-linux-
gnueabi/4.5.0/ -isystem ./include -isystem ./include-fixed xxx.c -dumpbase 
xxx.c -auxbase xxx -version -o xxx.s

Program received signal SIGSEGV, Segmentation fault.
0x051e9414 in ?? ()
(gdb) bt
#0  0x051e9414 in ?? ()
#1  0x0275d358 in __libc_csu_init ()
#2  0x400df8cc in __libc_start_main () from /lib/libc.so.6
#3  0x00068758 in _start ()

(gdb) disass 0x0275d348 0x0275d368
Dump of assembler code from 0x275d348 to 0x275d368:
0x0275d348 <__libc_csu_init+16>:        mov     r10, r0
0x0275d34c <__libc_csu_init+20>:        mov     r8, r1
0x0275d350 <__libc_csu_init+24>:        mov     r7, r2
0x0275d354 <__libc_csu_init+28>:        bl      0x275d528 <___init_veneer>
0x0275d358 <__libc_csu_init+32>:        ldr     r3, [pc, #64]   ; 0x275d3a0 
<__libc_csu_init+104>
0x0275d35c <__libc_csu_init+36>:        ldr     r2, [pc, #64]   ; 0x275d3a4 
<__libc_csu_init+108>
0x0275d360 <__libc_csu_init+40>:        rsb     r3, r2, r3
0x0275d364 <__libc_csu_init+44>:        asrs    r5, r3, #2
End of assembler dump.
Starting program: /home/dave/gnu/gcc/objdir/gcc/cc1 -
iprefix /home/dave/gnu/gcc/objdir/gcc/../lib/gcc/armv5tejl-unknown-linux-
gnueabi/4.5.0/ -isystem ./include -isystem ./include-fixed xxx.c -dumpbase 
xxx.c -auxbase xxx -version -o xxx.s

Breakpoint 5, 0x0275d354 in __libc_csu_init ()
(gdb) stepi
0x0275d528 in ___init_veneer ()
(gdb) disass
Dump of assembler code for function ___init_veneer:
0x0275d528 <___init_veneer+0>:  ldr     pc, [pc, #-4]   ; 0x275d52c 
<___init_veneer+4>
0x0275d52c <___init_veneer+4>:  ldreq   r9, [lr, #-1044]
End of assembler dump.
(gdb) stepi
0x0275d528 in ___init_veneer ()
Could not insert single-step breakpoint at 0x51e9414

-- 
           Summary: ld generates bad long branch stubs
           Product: binutils
           Version: 2.20 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: danglin at gcc dot gnu dot org
                CC: bug-binutils at gnu dot org,julian at codesourcery dot
                    com
 GCC build triplet: armv5tejl-unknown-linux-gnueabi
  GCC host triplet: armv5tejl-unknown-linux-gnueabi
GCC target triplet: armv5tejl-unknown-linux-gnueabi


http://sourceware.org/bugzilla/show_bug.cgi?id=10259

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