/* Functions for manipulating expressions designed to be executed on the agent
- Copyright (C) 1998, 1999, 2000, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 1998-2015 Free Software Foundation, Inc.
This file is part of GDB.
#include "ax.h"
#include "value.h"
-#include "gdb_string.h"
-
#include "user-regs.h"
static void grow_expr (struct agent_expr *x, int n);
struct agent_expr *
new_agent_expr (struct gdbarch *gdbarch, CORE_ADDR scope)
{
- struct agent_expr *x = xmalloc (sizeof (*x));
+ struct agent_expr *x = XNEW (struct agent_expr);
x->len = 0;
x->size = 1; /* Change this to a larger value once
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]));
+ x->tracing = 0;
+ x->trace_string = 0;
+
return x;
}
x->len += 3;
}
+/* Append a string to the expression. Note that the string is going
+ into the bytecodes directly, not on the stack. As a precaution,
+ include both length as prefix, and terminate with a NUL. (The NUL
+ is counted in the length.) */
+
void
-ax_memcpy (struct agent_expr *x, const void *src, size_t n)
+ax_string (struct agent_expr *x, const char *str, int slen)
{
- grow_expr (x, n);
- memcpy (x->buf + x->len, src, n);
- x->len += n;
+ int i;
+
+ /* Make sure the string length is reasonable. */
+ if (slen < 0 || slen > 0xffff)
+ internal_error (__FILE__, __LINE__,
+ _("ax-general.c (ax_string): string "
+ "length is %d, out of allowed range"), slen);
+
+ grow_expr (x, 2 + slen + 1);
+ x->buf[x->len++] = ((slen + 1) >> 8) & 0xff;
+ x->buf[x->len++] = (slen + 1) & 0xff;
+ for (i = 0; i < slen; ++i)
+ x->buf[x->len++] = str[i];
+ x->buf[x->len++] = '\0';
}
\f
ax_print (struct ui_file *f, struct agent_expr *x)
{
int i;
- int is_float = 0;
fprintf_filtered (f, _("Scope: %s\n"), paddress (x->gdbarch, x->scope));
fprintf_filtered (f, _("Reg mask:"));
for (i = 0; i < x->len;)
{
- enum agent_op op = x->buf[i];
- int op_size;
+ enum agent_op op = (enum agent_op) x->buf[i];
if (op >= (sizeof (aop_map) / sizeof (aop_map[0]))
|| !aop_map[op].name)
i++;
continue;
}
- if (op == aop_printf)
- {
- if (i + 2 >= x->len)
- {
- fprintf_filtered (f, _("%3d <bad opcode %02x>\n"), i, op);
- i++;
- continue;
- }
- op_size = 1 + strlen (x->buf + i + 2) + 1;
- }
- else
- op_size = aop_map[op].op_size;
- if (i + 1 + op_size > x->len)
+ if (i + 1 + aop_map[op].op_size > x->len)
{
fprintf_filtered (f, _("%3d <incomplete opcode %s>\n"),
i, aop_map[op].name);
}
fprintf_filtered (f, "%3d %s", i, aop_map[op].name);
- if (op_size > 0)
+ if (aop_map[op].op_size > 0)
{
fputs_filtered (" ", f);
print_longest (f, 'd', 0,
- read_const (x, i + 1, op_size));
+ read_const (x, i + 1, aop_map[op].op_size));
}
- fprintf_filtered (f, "\n");
- i += 1 + op_size;
+ /* Handle the complicated printf arguments specially. */
+ else if (op == aop_printf)
+ {
+ int slen, nargs;
- is_float = (op == aop_float);
+ i++;
+ nargs = x->buf[i++];
+ slen = x->buf[i++];
+ slen = slen * 256 + x->buf[i++];
+ fprintf_filtered (f, _(" \"%s\", %d args"),
+ &(x->buf[i]), nargs);
+ i += slen - 1;
+ }
+ fprintf_filtered (f, "\n");
+ i += 1 + aop_map[op].op_size;
}
}
/* Pointer to a description of the present op. */
struct aop_map *op;
- int op_size = 0, consumed = 0;
-
memset (targets, 0, ax->len * sizeof (targets[0]));
memset (boundary, 0, ax->len * sizeof (boundary[0]));
ax->flaw = agent_flaw_none;
ax->max_data_size = 0;
- for (i = 0; i < ax->len; i += 1 + op_size)
+ for (i = 0; i < ax->len; i += 1 + op->op_size)
{
if (ax->buf[i] > (sizeof (aop_map) / sizeof (aop_map[0])))
{
return;
}
- if (ax->buf[i] == aop_printf)
- {
- if (i + 2 >= ax->len)
- {
- ax->flaw = agent_flaw_incomplete_instruction;
- return;
- }
- consumed = ax->buf[i + 1];
- op_size = 1 + strlen (ax->buf + i + 2) + 1;
- }
- else
- {
- op_size = op->op_size;
- consumed = op->consumed;
- }
-
- if (i + 1 + op_size > ax->len)
+ if (i + 1 + op->op_size > ax->len)
{
ax->flaw = agent_flaw_incomplete_instruction;
return;
boundary[i] = 1;
heights[i] = height;
- height -= consumed;
+ height -= op->consumed;
if (height < ax->min_height)
ax->min_height = height;
height += op->produced;