* corelow.c (core_pid_to_str): Default to using normal_pid_to_str

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

diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c
index 661a5bd469e4b57a1a013702f1cb9b830ce0eacf..682054c44b4c9dfa52aa72d412be1e41628b4135 100644 (file)
--- a/gdb/arm-linux-tdep.c
+++ b/gdb/arm-linux-tdep.c
@@ -74,9 +74,28 @@ static const char arm_linux_thumb_be_breakpoint[] = {0xde, 0x01};
 
 static const char arm_linux_thumb_le_breakpoint[] = {0x01, 0xde};
 
-/* Description of the longjmp buffer.  */
+/* Because the 16-bit Thumb breakpoint is affected by Thumb-2 IT blocks,
+   we must use a length-appropriate breakpoint for 32-bit Thumb
+   instructions.  See also thumb_get_next_pc.  */
+
+static const char arm_linux_thumb2_be_breakpoint[] = { 0xf7, 0xf0, 0xa0, 0x00 };
+
+static const char arm_linux_thumb2_le_breakpoint[] = { 0xf0, 0xf7, 0x00, 0xa0 };
+
+/* Description of the longjmp buffer.  The buffer is treated as an array of 
+   elements of size ARM_LINUX_JB_ELEMENT_SIZE.
+
+   The location of saved registers in this buffer (in particular the PC
+   to use after longjmp is called) varies depending on the ABI (in 
+   particular the FP model) and also (possibly) the C Library.
+
+   For glibc, eglibc, and uclibc the following holds:  If the FP model is 
+   SoftVFP or VFP (which implies EABI) then the PC is at offset 9 in the 
+   buffer.  This is also true for the SoftFPA model.  However, for the FPA 
+   model the PC is at offset 21 in the buffer.  */
 #define ARM_LINUX_JB_ELEMENT_SIZE      INT_REGISTER_SIZE
-#define ARM_LINUX_JB_PC                        21
+#define ARM_LINUX_JB_PC_FPA            21
+#define ARM_LINUX_JB_PC_EABI           9
 
 /*
    Dynamic Linking on ARM GNU/Linux
@@ -636,7 +655,7 @@ arm_linux_software_single_step (struct frame_info *frame)
 /* Support for displaced stepping of Linux SVC instructions.  */
 
 static void
-arm_linux_cleanup_svc (struct gdbarch *gdbarch ATTRIBUTE_UNUSED,
+arm_linux_cleanup_svc (struct gdbarch *gdbarch,
                       struct regcache *regs,
                       struct displaced_step_closure *dsc)
 {
@@ -757,7 +776,7 @@ arm_linux_copy_svc (struct gdbarch *gdbarch, uint32_t insn, CORE_ADDR to,
    would have been called from the non-displaced location).  */
 
 static void
-cleanup_kernel_helper_return (struct gdbarch *gdbarch ATTRIBUTE_UNUSED,
+cleanup_kernel_helper_return (struct gdbarch *gdbarch,
                              struct regcache *regs,
                              struct displaced_step_closure *dsc)
 {
@@ -843,6 +862,8 @@ arm_linux_init_abi (struct gdbarch_info info,
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
+  linux_init_abi (info, gdbarch);
+
   tdep->lowest_pc = 0x8000;
   if (info.byte_order == BFD_ENDIAN_BIG)
     {
@@ -851,6 +872,7 @@ arm_linux_init_abi (struct gdbarch_info info,
       else
        tdep->arm_breakpoint = arm_linux_arm_be_breakpoint;
       tdep->thumb_breakpoint = arm_linux_thumb_be_breakpoint;
+      tdep->thumb2_breakpoint = arm_linux_thumb2_be_breakpoint;
     }
   else
     {
@@ -859,14 +881,31 @@ arm_linux_init_abi (struct gdbarch_info info,
       else
        tdep->arm_breakpoint = arm_linux_arm_le_breakpoint;
       tdep->thumb_breakpoint = arm_linux_thumb_le_breakpoint;
+      tdep->thumb2_breakpoint = arm_linux_thumb2_le_breakpoint;
     }
   tdep->arm_breakpoint_size = sizeof (arm_linux_arm_le_breakpoint);
   tdep->thumb_breakpoint_size = sizeof (arm_linux_thumb_le_breakpoint);
+  tdep->thumb2_breakpoint_size = sizeof (arm_linux_thumb2_le_breakpoint);
 
   if (tdep->fp_model == ARM_FLOAT_AUTO)
     tdep->fp_model = ARM_FLOAT_FPA;
 
-  tdep->jb_pc = ARM_LINUX_JB_PC;
+  switch (tdep->fp_model)
+    {
+    case ARM_FLOAT_FPA:
+      tdep->jb_pc = ARM_LINUX_JB_PC_FPA;
+      break;
+    case ARM_FLOAT_SOFT_FPA:
+    case ARM_FLOAT_SOFT_VFP:
+    case ARM_FLOAT_VFP:
+      tdep->jb_pc = ARM_LINUX_JB_PC_EABI;
+      break;
+    default:
+      internal_error
+       (__FILE__, __LINE__,
+         _("arm_linux_init_abi: Floating point model not supported"));
+      break;
+    }
   tdep->jb_elt_size = ARM_LINUX_JB_ELEMENT_SIZE;
 
   set_solib_svr4_fetch_link_map_offsets