Public bug reported:
[Impact]
gdb reports no hw watchpoint/breakpoint support on ARMv8.1
[Test Case]
Test.c:
int main(void)
{
int a;
a = 0;
a++;
return a!=1;
}
----- CUT ----
gcc -g test.c -o testprog
apinski@apinski-ss1:~/binutils-gdb$ ./tools/bin/gdb -q a.out
Reading symbols from a.out...done.
(gdb) start
Temporary breakpoint 1 at 0x40050c: file t.c, line 4.
Starting program: /home/apinski/binutils-gdb/a.out
Temporary breakpoint 1, main () at t.c:4
4 a = 0;
(gdb) hb 5
Hardware assisted breakpoint 2 at 0x400510: file t.c, line 5.
(gdb) c
Continuing.
Breakpoint 2, main () at t.c:5
5 a++;
(gdb)
This fails on ARMv8.1 platforms w/o the patch.
[Regression Risk]
Patch is a clean cherry pick from upstream that just adds code to detect 8.1 &
8.2 chip debug types.
** Affects: gdb (Ubuntu)
Importance: Undecided
Status: New
** Affects: gdb (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: gdb (Ubuntu Xenial)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1608948
Title:
support hw watchpoints/breakpoints on ARMv8.{1,2}
Status in gdb package in Ubuntu:
New
Status in gdb source package in Xenial:
New
Bug description:
[Impact]
gdb reports no hw watchpoint/breakpoint support on ARMv8.1
[Test Case]
Test.c:
int main(void)
{
int a;
a = 0;
a++;
return a!=1;
}
----- CUT ----
gcc -g test.c -o testprog
apinski@apinski-ss1:~/binutils-gdb$ ./tools/bin/gdb -q a.out
Reading symbols from a.out...done.
(gdb) start
Temporary breakpoint 1 at 0x40050c: file t.c, line 4.
Starting program: /home/apinski/binutils-gdb/a.out
Temporary breakpoint 1, main () at t.c:4
4 a = 0;
(gdb) hb 5
Hardware assisted breakpoint 2 at 0x400510: file t.c, line 5.
(gdb) c
Continuing.
Breakpoint 2, main () at t.c:5
5 a++;
(gdb)
This fails on ARMv8.1 platforms w/o the patch.
[Regression Risk]
Patch is a clean cherry pick from upstream that just adds code to detect 8.1
& 8.2 chip debug types.
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https://bugs.launchpad.net/ubuntu/+source/gdb/+bug/1608948/+subscriptions
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