http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50299
Bug #: 50299
Summary: entryval: bigendian 32bit->64bit extension breaks
address match
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Target: s390x-rhel62-linux-gnu
archer-jankratochvil-entryval:
f (r1=r1@entry=1, r2=r2@entry=2, r3=r3@entry=3, r4=r4@entry=4, r5=r5@entry=5,
s1=11) at 1.c:5
5 }
(gdb) p s1@entry
Cannot find matching parameter at DW_TAG_GNU_call_site 0x80000516 at main
static void __attribute__ ((noinline, noclone))
f (int r1, int r2, int r3, int r4, int r5, int s1)
{
asm volatile ("" ::: "memory");
}
int
main (void)
{
f (1, 2, 3, 4, 5, 11);
return 0;
}
-Wall -g -O2
gcc (GCC) 4.7.0 20110805 (experimental)
In main() it is 8 bytes at %r15+160 but in f() it is 4 bytes at %r15+164.
160 != 164 and GDB cannot know how many bytes it is in main(), there is no
parameter width anywhere there.
80000502: e3 10 f0 a0 00 24 stg %r1,160(%r15)
80000510: c0 e5 ff ff ff ea brasl %r14,800004e4 <f>
<2><c3>: Abbrev Number: 6 (DW_TAG_GNU_call_site)
<c4> DW_AT_low_pc : 0x80000516
<cc> DW_AT_abstract_origin: <0x31>
<3><ea>: Abbrev Number: 7 (DW_TAG_GNU_call_site_parameter)
<eb> DW_AT_location : 3 byte block: 7f a0 1 (DW_OP_breg15 (r15):
160)
<ef> DW_AT_GNU_call_site_value: 1 byte block: 3b (DW_OP_lit11)
<2><8c>: Abbrev Number: 3 (DW_TAG_formal_parameter)
<8d> DW_AT_name : s1
<92> DW_AT_type : <0x9a>
<96> DW_AT_location : 2 byte block: 91 4 (DW_OP_fbreg: 4)
<1><9a>: Abbrev Number: 4 (DW_TAG_base_type)
<9b> DW_AT_byte_size : 4
<9d> DW_AT_name : int
<1><31>: Abbrev Number: 2 (DW_TAG_subprogram)
<32> DW_AT_name : f
<47> DW_AT_frame_base : 3 byte block: 7f a0 1 (DW_OP_breg15 (r15):
160)
