/* Functions for manipulating expressions designed to be executed on the agent
- Copyright (C) 1998, 1999, 2000, 2007, 2008, 2009, 2010
+ Copyright (C) 1998, 1999, 2000, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
This file is part of GDB.
#include "value.h"
#include "gdb_string.h"
+#include "user-regs.h"
+
static void grow_expr (struct agent_expr *x, int n);
static void append_const (struct agent_expr *x, LONGEST val, int n);
/* Allocate a new, empty agent expression. */
struct agent_expr *
-new_agent_expr (CORE_ADDR scope)
+new_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
reallocation code is tested. */
x->buf = xmalloc (x->size);
+
+ x->gdbarch = gdbarch;
x->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]));
+
return x;
}
free_agent_expr (struct agent_expr *x)
{
xfree (x->buf);
+ xfree (x->reg_mask);
xfree (x);
}
error (_("GDB bug: ax-general.c (generic_ext): bit count out of range"));
/* That had better be enough range. */
if (sizeof (LONGEST) * 8 > 255)
- error (_("GDB bug: ax-general.c (generic_ext): opcode has inadequate range"));
+ error (_("GDB bug: ax-general.c (generic_ext): "
+ "opcode has inadequate range"));
grow_expr (x, 2);
x->buf[x->len++] = op;
{
/* N must fit in a byte. */
if (n < 0 || n > 255)
- error (_("GDB bug: ax-general.c (ax_trace_quick): size out of range for trace_quick"));
+ error (_("GDB bug: ax-general.c (ax_trace_quick): "
+ "size out of range for trace_quick"));
grow_expr (x, 2);
x->buf[x->len++] = aop_trace_quick;
break;
}
- /* Emit the right opcode... */
+ /* Emit the right opcode... */
ax_simple (x, ops[op]);
/* Emit the low SIZE bytes as an unsigned number. We know that
ax_const_d (struct agent_expr *x, LONGEST d)
{
/* FIXME: floating-point support not present yet. */
- error (_("GDB bug: ax-general.c (ax_const_d): floating point not supported yet"));
+ error (_("GDB bug: ax-general.c (ax_const_d): "
+ "floating point not supported yet"));
}
void
ax_reg (struct agent_expr *x, int reg)
{
- /* Make sure the register number is in range. */
- if (reg < 0 || reg > 0xffff)
- error (_("GDB bug: ax-general.c (ax_reg): register number out of range"));
- grow_expr (x, 3);
- x->buf[x->len] = aop_reg;
- x->buf[x->len + 1] = (reg >> 8) & 0xff;
- x->buf[x->len + 2] = (reg) & 0xff;
- x->len += 3;
+ if (reg >= gdbarch_num_regs (x->gdbarch))
+ {
+ /* This is a pseudo-register. */
+ if (!gdbarch_ax_pseudo_register_push_stack_p (x->gdbarch))
+ error (_("'%s' is a pseudo-register; "
+ "GDB cannot yet trace its contents."),
+ user_reg_map_regnum_to_name (x->gdbarch, reg));
+ if (gdbarch_ax_pseudo_register_push_stack (x->gdbarch, x, reg))
+ error (_("Trace '%s' failed."),
+ user_reg_map_regnum_to_name (x->gdbarch, reg));
+ }
+ else
+ {
+ /* Make sure the register number is in range. */
+ if (reg < 0 || reg > 0xffff)
+ error (_("GDB bug: ax-general.c (ax_reg): "
+ "register number out of range"));
+ grow_expr (x, 3);
+ x->buf[x->len] = aop_reg;
+ x->buf[x->len + 1] = (reg >> 8) & 0xff;
+ x->buf[x->len + 2] = (reg) & 0xff;
+ x->len += 3;
+ }
}
/* Assemble code to operate on a trace state variable. */
{
/* Make sure the tsv number is in range. */
if (num < 0 || num > 0xffff)
- internal_error (__FILE__, __LINE__, _("ax-general.c (ax_tsv): variable number is %d, out of range"), num);
+ internal_error (__FILE__, __LINE__,
+ _("ax-general.c (ax_tsv): variable "
+ "number is %d, out of range"), num);
grow_expr (x, 3);
x->buf[x->len] = op;
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->reg_mask_len; ++i)
+ fprintf_filtered (f, _(" %02x"), x->reg_mask[i]);
+ fprintf_filtered (f, _("\n"));
+
/* Check the size of the name array against the number of entries in
the enum, to catch additions that people didn't sync. */
if ((sizeof (aop_map) / sizeof (aop_map[0]))
}
}
+/* Add register REG to the register mask for expression AX. */
+void
+ax_reg_mask (struct agent_expr *ax, int reg)
+{
+ if (reg >= gdbarch_num_regs (ax->gdbarch))
+ {
+ /* This is a pseudo-register. */
+ if (!gdbarch_ax_pseudo_register_collect_p (ax->gdbarch))
+ error (_("'%s' is a pseudo-register; "
+ "GDB cannot yet trace its contents."),
+ user_reg_map_regnum_to_name (ax->gdbarch, reg));
+ if (gdbarch_ax_pseudo_register_collect (ax->gdbarch, ax, reg))
+ error (_("Trace '%s' failed."),
+ user_reg_map_regnum_to_name (ax->gdbarch, reg));
+ }
+ else
+ {
+ int byte = reg / 8;
+
+ /* Grow the bit mask if necessary. */
+ if (byte >= ax->reg_mask_len)
+ {
+ /* 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]));
+ 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;
+ ax->reg_mask = new_reg_mask;
+ }
+
+ ax->reg_mask[byte] |= 1 << (reg % 8);
+ }
+}
-/* Given an agent expression AX, fill in an agent_reqs structure REQS
- describing it. */
+/* Given an agent expression AX, fill in requirements and other descriptive
+ bits. */
void
-ax_reqs (struct agent_expr *ax, struct agent_reqs *reqs)
+ax_reqs (struct agent_expr *ax)
{
int i;
int height;
- /* Bit vector for registers used. */
- int reg_mask_len = 1;
- unsigned char *reg_mask = xmalloc (reg_mask_len * sizeof (reg_mask[0]));
-
/* Jump target table. targets[i] is non-zero iff we have found a
jump to offset i. */
char *targets = (char *) alloca (ax->len * sizeof (targets[0]));
/* Pointer to a description of the present op. */
struct aop_map *op;
- memset (reg_mask, 0, reg_mask_len * sizeof (reg_mask[0]));
memset (targets, 0, ax->len * sizeof (targets[0]));
memset (boundary, 0, ax->len * sizeof (boundary[0]));
- reqs->max_height = reqs->min_height = height = 0;
- reqs->flaw = agent_flaw_none;
- reqs->max_data_size = 0;
+ ax->max_height = ax->min_height = height = 0;
+ ax->flaw = agent_flaw_none;
+ ax->max_data_size = 0;
for (i = 0; i < ax->len; i += 1 + op->op_size)
{
if (ax->buf[i] > (sizeof (aop_map) / sizeof (aop_map[0])))
{
- reqs->flaw = agent_flaw_bad_instruction;
- xfree (reg_mask);
+ ax->flaw = agent_flaw_bad_instruction;
return;
}
if (!op->name)
{
- reqs->flaw = agent_flaw_bad_instruction;
- xfree (reg_mask);
+ ax->flaw = agent_flaw_bad_instruction;
return;
}
if (i + 1 + op->op_size > ax->len)
{
- reqs->flaw = agent_flaw_incomplete_instruction;
- xfree (reg_mask);
+ ax->flaw = agent_flaw_incomplete_instruction;
return;
}
source? */
if (targets[i] && (heights[i] != height))
{
- reqs->flaw = agent_flaw_height_mismatch;
- xfree (reg_mask);
+ ax->flaw = agent_flaw_height_mismatch;
return;
}
heights[i] = height;
height -= op->consumed;
- if (height < reqs->min_height)
- reqs->min_height = height;
+ if (height < ax->min_height)
+ ax->min_height = height;
height += op->produced;
- if (height > reqs->max_height)
- reqs->max_height = height;
+ if (height > ax->max_height)
+ ax->max_height = height;
- if (op->data_size > reqs->max_data_size)
- reqs->max_data_size = op->data_size;
+ if (op->data_size > ax->max_data_size)
+ ax->max_data_size = op->data_size;
/* For jump instructions, check that the target is a valid
offset. If it is, record the fact that that location is a
int target = read_const (ax, i + 1, 2);
if (target < 0 || target >= ax->len)
{
- reqs->flaw = agent_flaw_bad_jump;
- xfree (reg_mask);
+ ax->flaw = agent_flaw_bad_jump;
return;
}
{
if (heights[target] != height)
{
- reqs->flaw = agent_flaw_height_mismatch;
- xfree (reg_mask);
+ ax->flaw = agent_flaw_height_mismatch;
return;
}
}
{
if (!targets[i + 3])
{
- reqs->flaw = agent_flaw_hole;
- xfree (reg_mask);
+ ax->flaw = agent_flaw_hole;
return;
}
if (aop_reg == op - aop_map)
{
int reg = read_const (ax, i + 1, 2);
- int byte = reg / 8;
-
- /* Grow the bit mask if necessary. */
- if (byte >= reg_mask_len)
- {
- /* It's not appropriate to double here. This isn't a
- string buffer. */
- int new_len = byte + 1;
- reg_mask = xrealloc (reg_mask,
- new_len * sizeof (reg_mask[0]));
- memset (reg_mask + reg_mask_len, 0,
- (new_len - reg_mask_len) * sizeof (reg_mask[0]));
- reg_mask_len = new_len;
- }
- reg_mask[byte] |= 1 << (reg % 8);
+ ax_reg_mask (ax, reg);
}
}
for (i = 0; i < ax->len; i++)
if (targets[i] && !boundary[i])
{
- reqs->flaw = agent_flaw_bad_jump;
- xfree (reg_mask);
+ ax->flaw = agent_flaw_bad_jump;
return;
}
- reqs->final_height = height;
- reqs->reg_mask_len = reg_mask_len;
- reqs->reg_mask = reg_mask;
+ ax->final_height = height;
}
projects / deliverable / binutils-gdb.git / blobdiff