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

[gdb-buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT c7da12c72c2eeb4f62e772df5cbb1f50f35a84ee ***

commit c7da12c72c2eeb4f62e772df5cbb1f50f35a84ee
Author:     Kamil Rytarowski <n54@gmx.com>
AuthorDate: Thu Mar 19 15:01:27 2020 +0100
Commit:     Kamil Rytarowski <n54@gmx.com>
CommitDate: Fri Mar 20 13:35:03 2020 +0100

    Add support for NetBSD threads in ppc-nbsd-nat.c
    
    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.
            * (store_registers): Likewise.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index c98b160931..f9076325fa 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2020-03-12  Kamil Rytarowski  <n54@gmx.com>
+
+	* ppc-nbsd-nat.c (fetch_registers): New variable lwp and pass
+	it to the ptrace call.
+	* (store_registers): Likewise.
+
 2020-03-19  Luis Machado  <luis.machado@linaro.org>
 
 	* nat/aarch64-sve-linux-ptrace.c (aarch64_sve_set_vq): If vg is not
diff --git a/gdb/ppc-nbsd-nat.c b/gdb/ppc-nbsd-nat.c
index 86a20a9732..67c03790ed 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"));
     }
 }