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Add support for NetBSD threads in x86-bsd-nat.c

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NetBSD ptrace(2) PT_GETDBREGS/PT_SETDBREGS accepts thread id (LWP)
as the 4th argument for threads.

gdb/ChangeLog:

        * x86-bsd-nat.c (x86bsd_dr_get): New variable lwp and pass
        it to the ptrace call.
        * x86-bsd-nat.c (x86bsd_dr_set): Likewise.
This commit is contained in:
Kamil Rytarowski 2020-03-14 14:17:16 +01:00
parent 6227b330d5
commit 013f99f035
2 changed files with 23 additions and 3 deletions
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6
gdb/ChangeLog
View File

@ -1,3 +1,9 @@
2020-03-14 Kamil Rytarowski <n54@gmx.com>
* x86-bsd-nat.c (x86bsd_dr_get): New variable lwp and pass
it to the ptrace call.
* x86-bsd-nat.c (x86bsd_dr_set): Likewise.
2020-03-14 Kamil Rytarowski <n54@gmx.com>
* vax-bsd-nat.c (vaxbsd_supply_gregset): New variable lwp and pass

20
gdb/x86-bsd-nat.c
View File

@ -56,9 +56,14 @@ static unsigned long
x86bsd_dr_get (ptid_t ptid, int regnum)
{
struct dbreg dbregs;
#ifdef __NetBSD__
int lwp = inferior_ptid.lwp ();
#else
int lwp = 0;
#endif
if (ptrace (PT_GETDBREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
(PTRACE_TYPE_ARG3) &dbregs, lwp) == -1)
perror_with_name (_("Couldn't read debug registers"));
return DBREG_DRX ((&dbregs), regnum);
@ -68,9 +73,14 @@ static void
x86bsd_dr_set (int regnum, unsigned long value)
{
struct dbreg dbregs;
#ifdef __NetBSD__
int lwp = inferior_ptid.lwp ();
#else
int lwp = 0;
#endif
if (ptrace (PT_GETDBREGS, get_ptrace_pid (inferior_ptid),
(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
(PTRACE_TYPE_ARG3) &dbregs, lwp) == -1)
perror_with_name (_("Couldn't get debug registers"));
/* For some mysterious reason, some of the reserved bits in the
@ -82,8 +92,12 @@ x86bsd_dr_set (int regnum, unsigned long value)
for (thread_info *thread : current_inferior ()->non_exited_threads ())
{
#ifdef __NetBSD__
lwp = thread->ptid.lwp ();
#endif
if (ptrace (PT_SETDBREGS, get_ptrace_pid (thread->ptid),
(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
(PTRACE_TYPE_ARG3) &dbregs, lwp) == -1)
perror_with_name (_("Couldn't write debug registers"));
}
}