gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gdb / arm-linux-nat.c

diff --git a/gdb/arm-linux-nat.c b/gdb/arm-linux-nat.c
index 52668da9fcf058efa4ca1c4bb05e9d836a9805fc..8bbaed5cf886826a1171b3ad9c4eaf52fde51ff0 100644 (file)
--- a/gdb/arm-linux-nat.c
+++ b/gdb/arm-linux-nat.c
@@ -1,5 +1,5 @@
 /* GNU/Linux on ARM native support.
-   Copyright (C) 1999-2019 Free Software Foundation, Inc.
+   Copyright (C) 1999-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -27,6 +27,7 @@
 #include "observable.h"
 #include "gdbthread.h"
 
+#include "aarch32-tdep.h"
 #include "arm-tdep.h"
 #include "arm-linux-tdep.h"
 #include "aarch32-linux-nat.h"
@@ -65,8 +66,6 @@
 #define PTRACE_SETHBPREGS 30
 #endif
 
-extern int arm_apcs_32;
-
 class arm_linux_nat_target final : public linux_nat_target
 {
 public:
@@ -276,8 +275,6 @@ store_regs (const struct regcache *regcache)
 /* Fetch all WMMX registers of the process and store into
    regcache.  */
 
-#define IWMMXT_REGS_SIZE (16 * 8 + 6 * 4)
-
 static void
 fetch_wmmx_regs (struct regcache *regcache)
 {
@@ -339,7 +336,7 @@ store_wmmx_regs (const struct regcache *regcache)
 static void
 fetch_vfp_regs (struct regcache *regcache)
 {
-  gdb_byte regbuf[VFP_REGS_SIZE];
+  gdb_byte regbuf[ARM_VFP3_REGS_SIZE];
   int ret, tid;
   struct gdbarch *gdbarch = regcache->arch ();
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
@@ -352,7 +349,7 @@ fetch_vfp_regs (struct regcache *regcache)
       struct iovec iov;
 
       iov.iov_base = regbuf;
-      iov.iov_len = VFP_REGS_SIZE;
+      iov.iov_len = ARM_VFP3_REGS_SIZE;
       ret = ptrace (PTRACE_GETREGSET, tid, NT_ARM_VFP, &iov);
     }
   else
@@ -368,7 +365,7 @@ fetch_vfp_regs (struct regcache *regcache)
 static void
 store_vfp_regs (const struct regcache *regcache)
 {
-  gdb_byte regbuf[VFP_REGS_SIZE];
+  gdb_byte regbuf[ARM_VFP3_REGS_SIZE];
   int ret, tid;
   struct gdbarch *gdbarch = regcache->arch ();
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
@@ -381,7 +378,7 @@ store_vfp_regs (const struct regcache *regcache)
       struct iovec iov;
 
       iov.iov_base = regbuf;
-      iov.iov_len = VFP_REGS_SIZE;
+      iov.iov_len = ARM_VFP3_REGS_SIZE;
       ret = ptrace (PTRACE_GETREGSET, tid, NT_ARM_VFP, &iov);
     }
   else
@@ -398,7 +395,7 @@ store_vfp_regs (const struct regcache *regcache)
       struct iovec iov;
 
       iov.iov_base = regbuf;
-      iov.iov_len = VFP_REGS_SIZE;
+      iov.iov_len = ARM_VFP3_REGS_SIZE;
       ret = ptrace (PTRACE_SETREGSET, tid, NT_ARM_VFP, &iov);
     }
   else
@@ -553,33 +550,26 @@ arm_linux_nat_target::read_description ()
     }
 
   if (arm_hwcap & HWCAP_IWMMXT)
-    return tdesc_arm_with_iwmmxt;
+    return arm_read_description (ARM_FP_TYPE_IWMMXT);
 
   if (arm_hwcap & HWCAP_VFP)
     {
-      int pid;
-      char *buf;
-      const struct target_desc * result = NULL;
+      /* Make sure that the kernel supports reading VFP registers.  Support was
+        added in 2.6.30.  */
+      int pid = inferior_ptid.lwp ();
+      errno = 0;
+      char *buf = (char *) alloca (ARM_VFP3_REGS_SIZE);
+      if (ptrace (PTRACE_GETVFPREGS, pid, 0, buf) < 0 && errno == EIO)
+       return nullptr;
 
       /* NEON implies VFPv3-D32 or no-VFP unit.  Say that we only support
         Neon with VFPv3-D32.  */
       if (arm_hwcap & HWCAP_NEON)
-       result = tdesc_arm_with_neon;
+       return aarch32_read_description ();
       else if ((arm_hwcap & (HWCAP_VFPv3 | HWCAP_VFPv3D16)) == HWCAP_VFPv3)
-       result = tdesc_arm_with_vfpv3;
-      else
-       result = tdesc_arm_with_vfpv2;
-
-      /* Now make sure that the kernel supports reading these
-        registers.  Support was added in 2.6.30.  */
-      pid = inferior_ptid.lwp ();
-      errno = 0;
-      buf = (char *) alloca (VFP_REGS_SIZE);
-      if (ptrace (PTRACE_GETVFPREGS, pid, 0, buf) < 0
-         && errno == EIO)
-       result = NULL;
+       return arm_read_description (ARM_FP_TYPE_VFPV3);
 
-      return result;
+      return arm_read_description (ARM_FP_TYPE_VFPV2);
     }
 
   return this->beneath ()->read_description ();
@@ -690,7 +680,7 @@ arm_linux_nat_target::can_use_hw_breakpoint (enum bptype type,
        return -1;
     }
   else
-    gdb_assert (FALSE);
+    gdb_assert_not_reached ("unknown breakpoint type");
 
   return 1;
 }
@@ -1309,8 +1299,9 @@ arm_linux_nat_target::low_new_fork (struct lwp_info *parent, pid_t child_pid)
   *child_state = *parent_state;
 }
 
+void _initialize_arm_linux_nat ();
 void
-_initialize_arm_linux_nat (void)
+_initialize_arm_linux_nat ()
 {
   /* Register the target.  */
   linux_target = &the_arm_linux_nat_target;