Merge gdb and gdbserver implementations for siginfo

[deliverable/binutils-gdb.git] / gdb / ft32-tdep.c

diff --git a/gdb/ft32-tdep.c b/gdb/ft32-tdep.c
index 7c6efbb4336106b25f4bcc08daa06935abe6efda..720eaa70e20e45a0335e2b98a9f622e3f13e7805 100644 (file)
--- a/gdb/ft32-tdep.c
+++ b/gdb/ft32-tdep.c
@@ -1,6 +1,6 @@
 /* Target-dependent code for FT32.
 
-   Copyright (C) 2009-2015 Free Software Foundation, Inc.
+   Copyright (C) 2009-2016 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -37,6 +37,8 @@
 #include "dis-asm.h"
 #include "record.h"
 
+#include "opcode/ft32.h"
+
 #include "ft32-tdep.h"
 #include "gdb/sim-ft32.h"
 
@@ -153,11 +155,6 @@ ft32_store_return_value (struct type *type, struct regcache *regcache,
 
    Returns the address of the first instruction after the prologue.  */
 
-#define IS_PUSH(inst)   (((inst) & 0xfff00000) == 0x84000000)
-#define PUSH_REG(inst)  (FT32_R0_REGNUM + (((inst) >> 15) & 0x1f))
-#define IS_LINK(inst)   (((inst) & 0xffff0000) == 0x95d00000)
-#define LINK_SIZE(inst) ((inst) & 0xffff)
-
 static CORE_ADDR
 ft32_analyze_prologue (CORE_ADDR start_addr, CORE_ADDR end_addr,
                       struct ft32_frame_cache *cache,
@@ -167,33 +164,76 @@ ft32_analyze_prologue (CORE_ADDR start_addr, CORE_ADDR end_addr,
   CORE_ADDR next_addr;
   ULONGEST inst, inst2;
   LONGEST offset;
-  int regnum;
+  int regnum, pushreg;
+  struct bound_minimal_symbol msymbol;
+  const int first_saved_reg = 13;      /* The first saved register.  */
+  /* PROLOGS are addresses of the subroutine prologs, PROLOGS[n]
+     is the address of __prolog_$rN.
+     __prolog_$rN pushes registers from 13 through n inclusive.
+     So for example CALL __prolog_$r15 is equivalent to:
+       PUSH $r13 
+       PUSH $r14 
+       PUSH $r15 
+     Note that PROLOGS[0] through PROLOGS[12] are unused.  */
+  CORE_ADDR prologs[32];
 
   cache->saved_regs[FT32_PC_REGNUM] = 0;
   cache->framesize = 0;
 
+  for (regnum = first_saved_reg; regnum < 32; regnum++)
+    {
+      char prolog_symbol[32];
+
+      snprintf (prolog_symbol, sizeof (prolog_symbol), "__prolog_$r%02d",
+               regnum);
+      msymbol = lookup_minimal_symbol (prolog_symbol, NULL, NULL);
+      if (msymbol.minsym)
+       prologs[regnum] = BMSYMBOL_VALUE_ADDRESS (msymbol);
+      else
+       prologs[regnum] = 0;
+    }
+
   if (start_addr >= end_addr)
-      return end_addr;
+    return end_addr;
 
   cache->established = 0;
-  for (next_addr = start_addr; next_addr < end_addr; )
+  for (next_addr = start_addr; next_addr < end_addr;)
     {
       inst = read_memory_unsigned_integer (next_addr, 4, byte_order);
 
-      if (IS_PUSH (inst))
+      if (FT32_IS_PUSH (inst))
        {
-         regnum = PUSH_REG (inst);
+         pushreg = FT32_PUSH_REG (inst);
          cache->framesize += 4;
-         cache->saved_regs[regnum] = cache->framesize;
+         cache->saved_regs[FT32_R0_REGNUM + pushreg] = cache->framesize;
          next_addr += 4;
        }
+      else if (FT32_IS_CALL (inst))
+       {
+         for (regnum = first_saved_reg; regnum < 32; regnum++)
+           {
+             if ((4 * (inst & 0x3ffff)) == prologs[regnum])
+               {
+                 for (pushreg = first_saved_reg; pushreg <= regnum;
+                      pushreg++)
+                   {
+                     cache->framesize += 4;
+                     cache->saved_regs[FT32_R0_REGNUM + pushreg] =
+                       cache->framesize;
+                   }
+                 next_addr += 4;
+               }
+           }
+         break;
+       }
       else
        break;
     }
   for (regnum = FT32_R0_REGNUM; regnum < FT32_PC_REGNUM; regnum++)
     {
       if (cache->saved_regs[regnum] != REG_UNAVAIL)
-       cache->saved_regs[regnum] = cache->framesize - cache->saved_regs[regnum];
+       cache->saved_regs[regnum] =
+         cache->framesize - cache->saved_regs[regnum];
     }
   cache->saved_regs[FT32_PC_REGNUM] = cache->framesize;
 
@@ -201,7 +241,7 @@ ft32_analyze_prologue (CORE_ADDR start_addr, CORE_ADDR end_addr,
   if (next_addr < end_addr)
     {
       inst = read_memory_unsigned_integer (next_addr, 4, byte_order);
-      if (IS_LINK (inst))
+      if (FT32_IS_LINK (inst))
        {
          cache->established = 1;
          for (regnum = FT32_R0_REGNUM; regnum < FT32_PC_REGNUM; regnum++)
@@ -211,7 +251,7 @@ ft32_analyze_prologue (CORE_ADDR start_addr, CORE_ADDR end_addr,
            }
          cache->saved_regs[FT32_PC_REGNUM] = cache->framesize + 4;
          cache->saved_regs[FT32_FP_REGNUM] = 0;
-         cache->framesize += LINK_SIZE (inst);
+         cache->framesize += FT32_LINK_SIZE (inst);
          next_addr += 4;
        }
     }
@@ -436,7 +476,7 @@ ft32_frame_cache (struct frame_info *this_frame, void **this_cache)
   int i;
 
   if (*this_cache)
-    return *this_cache;
+    return (struct ft32_frame_cache *) *this_cache;
 
   cache = ft32_alloc_frame_cache ();
   *this_cache = cache;