ubsan: aarch64: left shift of negative value

[deliverable/binutils-gdb.git] / gdb / amd64-bsd-nat.c

diff --git a/gdb/amd64-bsd-nat.c b/gdb/amd64-bsd-nat.c
index 4e6995c6448053f0bae45cbd2b4ee4b7e19e8919..35763a5b955f376cccef2ad41ad384263b897b0d 100644 (file)
--- a/gdb/amd64-bsd-nat.c
+++ b/gdb/amd64-bsd-nat.c
@@ -1,6 +1,6 @@
 /* Native-dependent code for AMD64 BSD's.
 
-   Copyright (C) 2003-2016 Free Software Foundation, Inc.
+   Copyright (C) 2003-2019 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -38,18 +38,20 @@
 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
    for all registers (including the floating-point registers).  */
 
-static void
-amd64bsd_fetch_inferior_registers (struct target_ops *ops,
-                                  struct regcache *regcache, int regnum)
+void
+amd64bsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
 {
-  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  struct gdbarch *gdbarch = regcache->arch ();
+  pid_t pid = get_ptrace_pid (regcache->ptid ());
+#if defined(PT_GETFSBASE) || defined(PT_GETGSBASE)
+  const struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+#endif
 
   if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
     {
       struct reg regs;
 
-      if (ptrace (PT_GETREGS, get_ptrace_pid (inferior_ptid),
-                 (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+      if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
        perror_with_name (_("Couldn't get registers"));
 
       amd64_supply_native_gregset (regcache, &regs, -1);
@@ -57,6 +59,33 @@ amd64bsd_fetch_inferior_registers (struct target_ops *ops,
        return;
     }
 
+#ifdef PT_GETFSBASE
+  if (regnum == -1 || regnum == tdep->fsbase_regnum)
+    {
+      register_t base;
+
+      if (ptrace (PT_GETFSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
+       perror_with_name (_("Couldn't get segment register fs_base"));
+
+      regcache->raw_supply (tdep->fsbase_regnum, &base);
+      if (regnum != -1)
+       return;
+    }
+#endif
+#ifdef PT_GETGSBASE
+  if (regnum == -1 || regnum == tdep->fsbase_regnum + 1)
+    {
+      register_t base;
+
+      if (ptrace (PT_GETGSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
+       perror_with_name (_("Couldn't get segment register gs_base"));
+
+      regcache->raw_supply (tdep->fsbase_regnum + 1, &base);
+      if (regnum != -1)
+       return;
+    }
+#endif
+
   if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
     {
       struct fpreg fpregs;
@@ -66,8 +95,8 @@ amd64bsd_fetch_inferior_registers (struct target_ops *ops,
       if (x86bsd_xsave_len != 0)
        {
          xstateregs = alloca (x86bsd_xsave_len);
-         if (ptrace (PT_GETXSTATE, get_ptrace_pid (inferior_ptid),
-                     (PTRACE_TYPE_ARG3) xstateregs, 0) == -1)
+         if (ptrace (PT_GETXSTATE, pid, (PTRACE_TYPE_ARG3) xstateregs, 0)
+             == -1)
            perror_with_name (_("Couldn't get extended state status"));
 
          amd64_supply_xsave (regcache, -1, xstateregs);
@@ -75,8 +104,7 @@ amd64bsd_fetch_inferior_registers (struct target_ops *ops,
        }
 #endif
 
-      if (ptrace (PT_GETFPREGS, get_ptrace_pid (inferior_ptid),
-                 (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+      if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
        perror_with_name (_("Couldn't get floating point status"));
 
       amd64_supply_fxsave (regcache, -1, &fpregs);
@@ -86,30 +114,62 @@ amd64bsd_fetch_inferior_registers (struct target_ops *ops,
 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
    this for all registers (including the floating-point registers).  */
 
-static void
-amd64bsd_store_inferior_registers (struct target_ops *ops,
-                                  struct regcache *regcache, int regnum)
+void
+amd64bsd_store_inferior_registers (struct regcache *regcache, int regnum)
 {
-  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  struct gdbarch *gdbarch = regcache->arch ();
+  pid_t pid = get_ptrace_pid (regcache->ptid ());
+#if defined(PT_SETFSBASE) || defined(PT_SETGSBASE)
+  const struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+#endif
 
   if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
     {
       struct reg regs;
 
-      if (ptrace (PT_GETREGS, get_ptrace_pid (inferior_ptid),
-                  (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+      if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
         perror_with_name (_("Couldn't get registers"));
 
       amd64_collect_native_gregset (regcache, &regs, regnum);
 
-      if (ptrace (PT_SETREGS, get_ptrace_pid (inferior_ptid),
-                 (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+      if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
         perror_with_name (_("Couldn't write registers"));
 
       if (regnum != -1)
        return;
     }
 
+#ifdef PT_SETFSBASE
+  if (regnum == -1 || regnum == tdep->fsbase_regnum)
+    {
+      register_t base;
+
+      /* Clear the full base value to support 32-bit targets.  */
+      base = 0;
+      regcache->raw_collect (tdep->fsbase_regnum, &base);
+
+      if (ptrace (PT_SETFSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
+       perror_with_name (_("Couldn't write segment register fs_base"));
+      if (regnum != -1)
+       return;
+    }
+#endif
+#ifdef PT_SETGSBASE
+  if (regnum == -1 || regnum == tdep->fsbase_regnum + 1)
+    {
+      register_t base;
+
+      /* Clear the full base value to support 32-bit targets.  */
+      base = 0;
+      regcache->raw_collect (tdep->fsbase_regnum + 1, &base);
+
+      if (ptrace (PT_SETGSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
+       perror_with_name (_("Couldn't write segment register gs_base"));
+      if (regnum != -1)
+       return;
+    }
+#endif
+
   if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
     {
       struct fpreg fpregs;
@@ -119,41 +179,25 @@ amd64bsd_store_inferior_registers (struct target_ops *ops,
       if (x86bsd_xsave_len != 0)
        {
          xstateregs = alloca (x86bsd_xsave_len);
-         if (ptrace (PT_GETXSTATE, get_ptrace_pid (inferior_ptid),
-                     (PTRACE_TYPE_ARG3) xstateregs, 0) == -1)
+         if (ptrace (PT_GETXSTATE, pid, (PTRACE_TYPE_ARG3) xstateregs, 0)
+             == -1)
            perror_with_name (_("Couldn't get extended state status"));
 
          amd64_collect_xsave (regcache, regnum, xstateregs, 0);
 
-         if (ptrace (PT_SETXSTATE, get_ptrace_pid (inferior_ptid),
-                     (PTRACE_TYPE_ARG3) xstateregs, x86bsd_xsave_len) == -1)
+         if (ptrace (PT_SETXSTATE, pid, (PTRACE_TYPE_ARG3) xstateregs,
+                     x86bsd_xsave_len) == -1)
            perror_with_name (_("Couldn't write extended state status"));
          return;
        }
 #endif
 
-      if (ptrace (PT_GETFPREGS, get_ptrace_pid (inferior_ptid),
-                 (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+      if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
        perror_with_name (_("Couldn't get floating point status"));
 
       amd64_collect_fxsave (regcache, regnum, &fpregs);
 
-      if (ptrace (PT_SETFPREGS, get_ptrace_pid (inferior_ptid),
-                 (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+      if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
        perror_with_name (_("Couldn't write floating point status"));
     }
 }
-
-/* Create a prototype *BSD/amd64 target.  The client can override it
-   with local methods.  */
-
-struct target_ops *
-amd64bsd_target (void)
-{
-  struct target_ops *t;
-
-  t = x86bsd_target ();
-  t->to_fetch_registers = amd64bsd_fetch_inferior_registers;
-  t->to_store_registers = amd64bsd_store_inferior_registers;
-  return t;
-}