I set the breakpoint, and it is called as you expected:
(gdb) bt
#0 ppc_register_info (ebl=0x6000000000004120, regno=-1, name=0x0,
namelen=0, prefix=0x0, setname=0x0, bits=0x0, type=0x0) at ppc_regs.c:45
#1 0x20000000000ba2c0 in ebl_register_info (ebl=0x6000000000004120,
regno=-1, name=0x0, namelen=0, prefix=0x0, setname=0x0, bits=0x0, type=0x0)
at eblreginfo.c:48
#2 0x20000000000a4f10 in dwfl_module_register_names
(mod=0x60000000000062d0, func=@0x4000000000003170: 0x4000000000001880
<print_register>, arg=0x60000fffffffb3a0) at dwfl_module_register_names.c:53
#3 0x4000000000001bd0 in handle_cfi (stuff=0x60000fffffffb3a0,
pc=268436672, which=0x4000000000002318 ".debug_frame",
dwfl=0x60000000000042f0, cfi=<optimized out>) at addrcfi.c:153
#4 handle_cfi (dwfl=0x60000000000042f0, which=0x4000000000002318
".debug_frame", cfi=0x6000000000007420, pc=268436672,
stuff=0x60000fffffffb3a0) at addrcfi.c:107
#5 0x4000000000001f50 in handle_address (pc=268436672,
dwfl=0x60000000000042f0) at addrcfi.c:167
#6 0x40000000000010b0 in main (argc=4, argv=0x60000fffffffb678) at
addrcfi.c:216
Also in addrcfi.c, the `bits` and `type` fields are marked with
__attribute__((unused)), so it may not be so crazy:
static int
print_register (void *arg,
int regno,
const char *setname,
const char *prefix,
const char *regname,
int bits __attribute__ ((unused)),
int type __attribute__ ((unused)))
{
On Wed, Oct 2, 2013 at 1:34 PM, Kurt Roeckx <k...@roeckx.be> wrote:
> On Wed, Oct 02, 2013 at 01:12:44PM -0500, Patrick Baggett wrote:
> > OK, here's what I get when I run that test in GDB:
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > dwarf_frame_register (fs=0x600000000000be00, regno=<optimized out>,
> > ops_mem=0x60000fffffffb2d0, ops=0x60000fffffffb2c8,
> > nops=0x60000fffffffb2c0) at dwarf_frame_register.c:105
> > 105 get_uleb128 (block.length, p);
> > (gdb) bt
> > #0 dwarf_frame_register (fs=0x600000000000be00, regno=<optimized out>,
> > ops_mem=0x60000fffffffb2d0, ops=0x60000fffffffb2c8,
> > nops=0x60000fffffffb2c0) at dwarf_frame_register.c:105
> > #1 0x4000000000001900 in print_register (arg=<optimized out>, regno=1,
> > setname=0x20000000004c9b18 "integer", prefix=0x20000000004c8890 "",
> > regname=0x60000fffffffb328 "r1", bits=-19768, type=675872) at
> > addrcfi.c:100
>
> This bits=-19768 clearly looks wrong. I would guess that should
> say 32.
>
> The type really should also be DW_ATE_signed (5).
>
> Can you set a breakpoint in ppc_register_info?
> dwfl_module_register_names should be calling that
> hook.
>
>
> Kurt
>
>
