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

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

[Kamil Rytarowski]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=a225c9a8692814b4a29360479aee217d73e22d50

commit a225c9a8692814b4a29360479aee217d73e22d50
Author: Kamil Rytarowski <n54@gmx.com>
Date:   Tue Mar 17 16:31:49 2020 +0100

    Add support for NetBSD threads in sh-nbsd-nat.c
    
    NetBSD ptrace(2) accepts thread id (LWP) as the 4th argument for threads.
    
    gdb/ChangeLog:
    
            * sh-nbsd-nat.c (fetch_registers): New variable lwp and pass
            it to the ptrace call.
            * sh-nbsd-nat.c (store_registers): Likewise.

Diff:
---
 gdb/ChangeLog     | 6 ++++++
 gdb/sh-nbsd-nat.c | 8 +++++---
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b0b98399552..e418e43740d 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2020-03-17  Kamil Rytarowski  <n54@gmx.com>
+
+	* sh-nbsd-nat.c (fetch_registers): New variable lwp and pass
+	it to the ptrace call.
+	* sh-nbsd-nat.c (store_registers): Likewise.
+
 2020-03-17  Kamil Rytarowski  <n54@gmx.com>
 
 	* sh-nbsd-nat.c (sh_nbsd_nat_target): Inherit from
diff --git a/gdb/sh-nbsd-nat.c b/gdb/sh-nbsd-nat.c
index 486ef9d18e9..b4f9db691ce 100644
--- a/gdb/sh-nbsd-nat.c
+++ b/gdb/sh-nbsd-nat.c
@@ -53,13 +53,14 @@ void
 sh_nbsd_nat_target::fetch_registers (struct regcache *regcache, int regno)
 {
   pid_t pid = regcache->ptid ().pid ();
+  int lwp = regcache->ptid ().lwp ();
 
   if (regno == -1 || GETREGS_SUPPLIES (regcache->arch (), regno))
     {
       struct reg inferior_registers;
 
       if (ptrace (PT_GETREGS, pid,
-		  (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
+		  (PTRACE_TYPE_ARG3) &inferior_registers, lwp) == -1)
 	perror_with_name (_("Couldn't get registers"));
 
       sh_corefile_supply_regset (&sh_corefile_gregset, regcache, regno,
@@ -75,13 +76,14 @@ void
 sh_nbsd_nat_target::store_registers (struct regcache *regcache, int regno)
 {
   pid_t pid = regcache->ptid ().pid ();
+  int lwp = regcache->ptid ().lwp ();
 
   if (regno == -1 || GETREGS_SUPPLIES (regcache->arch (), regno))
     {
       struct reg inferior_registers;
 
       if (ptrace (PT_GETREGS, pid,
-		  (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
+		  (PTRACE_TYPE_ARG3) &inferior_registers, lwp) == -1)
 	perror_with_name (_("Couldn't get registers"));
 
       sh_corefile_collect_regset (&sh_corefile_gregset, regcache, regno,
@@ -89,7 +91,7 @@ sh_nbsd_nat_target::store_registers (struct regcache *regcache, int regno)
 				  SHNBSD_SIZEOF_GREGS);
 
       if (ptrace (PT_SETREGS, pid,
-		  (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
+		  (PTRACE_TYPE_ARG3) &inferior_registers, lwp) == -1)
 	perror_with_name (_("Couldn't set registers"));
 
       if (regno != -1)