[PATCH] Add support for NetBSD threads in ppc-nbsd-nat.c

[Kamil Rytarowski]

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

gdb/ChangeLog:

	* ppc-nbsd-nat.c (fetch_registers): New variable lwp and pass
	it to the ptrace call.
	* ppc-nbsd-nat.c (store_registers): Likewise.
---
 gdb/ppc-nbsd-nat.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/gdb/ppc-nbsd-nat.c b/gdb/ppc-nbsd-nat.c
index 86a20a97329..67c03790ed7 100644
--- a/gdb/ppc-nbsd-nat.c
+++ b/gdb/ppc-nbsd-nat.c
@@ -91,12 +91,13 @@ ppc_nbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
 {
   struct gdbarch *gdbarch = regcache->arch ();
   pid_t pid = regcache->ptid ().pid ();
+  int lwp = regcache->ptid ().lwp ();

   if (regnum == -1 || getregs_supplies (gdbarch, regnum))
     {
       struct reg regs;

-      if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+      if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, lwp) == -1)
         perror_with_name (_("Couldn't get registers"));

       ppc_supply_gregset (&ppcnbsd_gregset, regcache,
@@ -107,7 +108,7 @@ ppc_nbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
     {
       struct fpreg fpregs;

-      if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+      if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1)
 	perror_with_name (_("Couldn't get FP registers"));

       ppc_supply_fpregset (&ppcnbsd_fpregset, regcache,
@@ -120,18 +121,19 @@ ppc_nbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
 {
   struct gdbarch *gdbarch = regcache->arch ();
   pid_t pid = regcache->ptid ().pid ();
+  int lwp = regcache->ptid ().lwp ();

   if (regnum == -1 || getregs_supplies (gdbarch, regnum))
     {
       struct reg regs;

-      if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+      if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, lwp) == -1)
 	perror_with_name (_("Couldn't get registers"));

       ppc_collect_gregset (&ppcnbsd_gregset, regcache,
 			   regnum, &regs, sizeof regs);

-      if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+      if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) &regs, lwp) == -1)
 	perror_with_name (_("Couldn't write registers"));
     }

@@ -139,13 +141,13 @@ ppc_nbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
     {
       struct fpreg fpregs;

-      if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+      if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1)
 	perror_with_name (_("Couldn't get FP registers"));

       ppc_collect_fpregset (&ppcnbsd_fpregset, regcache,
 			    regnum, &fpregs, sizeof fpregs);

-      if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+      if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1)
 	perror_with_name (_("Couldn't set FP registers"));
     }
 }
--
2.25.0