gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gdb / ax-general.c

diff --git a/gdb/ax-general.c b/gdb/ax-general.c
index 8bd4df6acfa0d1b19a84af83b023e712a739ba1b..4144233e962f0a3884902bf1e1dd2959a2f15016 100644 (file)
--- a/gdb/ax-general.c
+++ b/gdb/ax-general.c
@@ -1,5 +1,5 @@
 /* Functions for manipulating expressions designed to be executed on the agent
-   Copyright (C) 1998-2013 Free Software Foundation, Inc.
+   Copyright (C) 1998-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -23,10 +23,9 @@
 
 #include "defs.h"
 #include "ax.h"
+#include "gdbarch.h"
 
 #include "value.h"
-#include "gdb_string.h"
-
 #include "user-regs.h"
 
 static void grow_expr (struct agent_expr *x, int n);
@@ -39,50 +38,30 @@ static void generic_ext (struct agent_expr *x, enum agent_op op, int n);
 \f
 /* Functions for building expressions.  */
 
-/* Allocate a new, empty agent expression.  */
-struct agent_expr *
-new_agent_expr (struct gdbarch *gdbarch, CORE_ADDR scope)
+agent_expr::agent_expr (struct gdbarch *gdbarch, CORE_ADDR scope)
 {
-  struct agent_expr *x = xmalloc (sizeof (*x));
-
-  x->len = 0;
-  x->size = 1;                 /* Change this to a larger value once
+  this->len = 0;
+  this->size = 1;              /* Change this to a larger value once
                                   reallocation code is tested.  */
-  x->buf = xmalloc (x->size);
+  this->buf = (unsigned char *) xmalloc (this->size);
 
-  x->gdbarch = gdbarch;
-  x->scope = scope;
+  this->gdbarch = gdbarch;
+  this->scope = scope;
 
   /* Bit vector for registers used.  */
-  x->reg_mask_len = 1;
-  x->reg_mask = xmalloc (x->reg_mask_len * sizeof (x->reg_mask[0]));
-  memset (x->reg_mask, 0, x->reg_mask_len * sizeof (x->reg_mask[0]));
+  this->reg_mask_len = 1;
+  this->reg_mask = XCNEWVEC (unsigned char, this->reg_mask_len);
 
-  return x;
+  this->tracing = 0;
+  this->trace_string = 0;
 }
 
-/* Free a agent expression.  */
-void
-free_agent_expr (struct agent_expr *x)
+agent_expr::~agent_expr ()
 {
-  xfree (x->buf);
-  xfree (x->reg_mask);
-  xfree (x);
+  xfree (this->buf);
+  xfree (this->reg_mask);
 }
 
-static void
-do_free_agent_expr_cleanup (void *x)
-{
-  free_agent_expr (x);
-}
-
-struct cleanup *
-make_cleanup_free_agent_expr (struct agent_expr *x)
-{
-  return make_cleanup (do_free_agent_expr_cleanup, x);
-}
-
-
 /* Make sure that X has room for at least N more bytes.  This doesn't
    affect the length, just the allocated size.  */
 static void
@@ -93,7 +72,7 @@ grow_expr (struct agent_expr *x, int n)
       x->size *= 2;
       if (x->size < x->len + n)
        x->size = x->len + n + 10;
-      x->buf = xrealloc (x->buf, x->size);
+      x->buf = (unsigned char *) xrealloc (x->buf, x->size);
     }
 }
 
@@ -133,13 +112,20 @@ read_const (struct agent_expr *x, int o, int n)
   return accum;
 }
 
+/* See ax.h.  */
+
+void
+ax_raw_byte (struct agent_expr *x, gdb_byte byte)
+{
+  grow_expr (x, 1);
+  x->buf[x->len++] = byte;
+}
 
 /* Append a simple operator OP to EXPR.  */
 void
 ax_simple (struct agent_expr *x, enum agent_op op)
 {
-  grow_expr (x, 1);
-  x->buf[x->len++] = op;
+  ax_raw_byte (x, op);
 }
 
 /* Append a pick operator to EXPR.  DEPTH is the stack item to pick,
@@ -301,6 +287,9 @@ ax_reg (struct agent_expr *x, int reg)
     }
   else
     {
+      /* Get the remote register number.  */
+      reg = gdbarch_remote_register_number (x->gdbarch, reg);
+
       /* Make sure the register number is in range.  */
       if (reg < 0 || reg > 0xffff)
         error (_("GDB bug: ax-general.c (ax_reg): "
@@ -365,7 +354,7 @@ struct aop_map aop_map[] =
   {0, 0, 0, 0, 0}
 #define DEFOP(NAME, SIZE, DATA_SIZE, CONSUMED, PRODUCED, VALUE) \
   , { # NAME, SIZE, DATA_SIZE, CONSUMED, PRODUCED }
-#include "ax.def"
+#include "gdbsupport/ax.def"
 #undef DEFOP
 };
 
@@ -390,7 +379,7 @@ ax_print (struct ui_file *f, struct agent_expr *x)
 
   for (i = 0; i < x->len;)
     {
-      enum agent_op op = x->buf[i];
+      enum agent_op op = (enum agent_op) x->buf[i];
 
       if (op >= (sizeof (aop_map) / sizeof (aop_map[0]))
          || !aop_map[op].name)
@@ -449,7 +438,11 @@ ax_reg_mask (struct agent_expr *ax, int reg)
     }
   else
     {
-      int byte = reg / 8;
+      int byte;
+
+      /* Get the remote register number.  */
+      reg = gdbarch_remote_register_number (ax->gdbarch, reg);
+      byte = reg / 8;
 
       /* Grow the bit mask if necessary.  */
       if (byte >= ax->reg_mask_len)
@@ -457,9 +450,9 @@ ax_reg_mask (struct agent_expr *ax, int reg)
           /* It's not appropriate to double here.  This isn't a
             string buffer.  */
           int new_len = byte + 1;
-          unsigned char *new_reg_mask = xrealloc (ax->reg_mask,
-                                                 new_len
-                                                 * sizeof (ax->reg_mask[0]));
+          unsigned char *new_reg_mask
+           = XRESIZEVEC (unsigned char, ax->reg_mask, new_len);
+
           memset (new_reg_mask + ax->reg_mask_len, 0,
                  (new_len - ax->reg_mask_len) * sizeof (ax->reg_mask[0]));
           ax->reg_mask_len = new_len;