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-rw-r--r--gdb/ChangeLog16
-rw-r--r--gdb/ax-gdb.c4
-rw-r--r--gdb/ax-general.c77
-rw-r--r--gdb/gdbarch.c66
-rw-r--r--gdb/gdbarch.h20
-rwxr-xr-xgdb/gdbarch.sh10
-rw-r--r--gdb/mips-tdep.c48
7 files changed, 214 insertions, 27 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 5beba9a..6508a66 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,19 @@
+2010-12-28 Hui Zhu <teawater@gmail.com>
+
+ * gdbarch.sh (ax_pseudo_register_collect,
+ ax_pseudo_register_push_stack): new callbacks.
+ (agent_expr): Forward declare.
+ * gdbarch.h, gdbarch.c: Regenerate.
+ * ax-gdb.c (gen_expr): Remove pseudo-register check code.
+ * ax-general.c (user-regs.h): New include.
+ (ax_reg): Call gdbarch_ax_pseudo_register_push_stack.
+ (ax_reg_mask): Call gdbarch_ax_pseudo_register_collect.
+ * mips-tdep.c (ax.h): New include.
+ (mips_ax_pseudo_register_collect,
+ mips_ax_pseudo_register_push_stack): New functions.
+ (mips_gdbarch_init): Set mips_ax_pseudo_register_collect and
+ mips_ax_pseudo_register_push_stack.
+
2010-12-28 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (arm_register_aliases): Remove sp, pc, and fp.
diff --git a/gdb/ax-gdb.c b/gdb/ax-gdb.c
index e01f359..ab6b829 100644
--- a/gdb/ax-gdb.c
+++ b/gdb/ax-gdb.c
@@ -1978,10 +1978,6 @@ gen_expr (struct expression *exp, union exp_element **pc,
if (reg == -1)
internal_error (__FILE__, __LINE__,
_("Register $%s not available"), name);
- if (reg >= gdbarch_num_regs (exp->gdbarch))
- error (_("'%s' is a pseudo-register; "
- "GDB cannot yet trace pseudoregister contents."),
- name);
value->kind = axs_lvalue_register;
value->u.reg = reg;
value->type = register_type (exp->gdbarch, reg);
diff --git a/gdb/ax-general.c b/gdb/ax-general.c
index ab4591f..e1269e6 100644
--- a/gdb/ax-general.c
+++ b/gdb/ax-general.c
@@ -28,6 +28,8 @@
#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);
@@ -272,14 +274,28 @@ ax_const_d (struct agent_expr *x, LONGEST d)
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. */
@@ -413,23 +429,38 @@ ax_print (struct ui_file *f, struct agent_expr *x)
void
ax_reg_mask (struct agent_expr *ax, int reg)
{
- int byte = reg / 8;
-
- /* Grow the bit mask if necessary. */
- if (byte >= ax->reg_mask_len)
+ if (reg >= gdbarch_num_regs (ax->gdbarch))
{
- /* 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;
+ /* 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);
}
-
- ax->reg_mask[byte] |= 1 << (reg % 8);
}
/* Given an agent expression AX, fill in requirements and other descriptive
diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c
index 78e5c48..6921f64 100644
--- a/gdb/gdbarch.c
+++ b/gdb/gdbarch.c
@@ -164,6 +164,8 @@ struct gdbarch
gdbarch_pseudo_register_write_ftype *pseudo_register_write;
int num_regs;
int num_pseudo_regs;
+ gdbarch_ax_pseudo_register_collect_ftype *ax_pseudo_register_collect;
+ gdbarch_ax_pseudo_register_push_stack_ftype *ax_pseudo_register_push_stack;
int sp_regnum;
int pc_regnum;
int ps_regnum;
@@ -314,6 +316,8 @@ struct gdbarch startup_gdbarch =
0, /* pseudo_register_write */
0, /* num_regs */
0, /* num_pseudo_regs */
+ 0, /* ax_pseudo_register_collect */
+ 0, /* ax_pseudo_register_push_stack */
-1, /* sp_regnum */
-1, /* pc_regnum */
-1, /* ps_regnum */
@@ -594,6 +598,8 @@ verify_gdbarch (struct gdbarch *gdbarch)
if (gdbarch->num_regs == -1)
fprintf_unfiltered (log, "\n\tnum_regs");
/* Skip verify of num_pseudo_regs, invalid_p == 0 */
+ /* Skip verify of ax_pseudo_register_collect, has predicate */
+ /* Skip verify of ax_pseudo_register_push_stack, has predicate */
/* Skip verify of sp_regnum, invalid_p == 0 */
/* Skip verify of pc_regnum, invalid_p == 0 */
/* Skip verify of ps_regnum, invalid_p == 0 */
@@ -761,6 +767,18 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
"gdbarch_dump: auto_wide_charset = <%s>\n",
host_address_to_string (gdbarch->auto_wide_charset));
fprintf_unfiltered (file,
+ "gdbarch_dump: gdbarch_ax_pseudo_register_collect_p() = %d\n",
+ gdbarch_ax_pseudo_register_collect_p (gdbarch));
+ fprintf_unfiltered (file,
+ "gdbarch_dump: ax_pseudo_register_collect = <%s>\n",
+ host_address_to_string (gdbarch->ax_pseudo_register_collect));
+ fprintf_unfiltered (file,
+ "gdbarch_dump: gdbarch_ax_pseudo_register_push_stack_p() = %d\n",
+ gdbarch_ax_pseudo_register_push_stack_p (gdbarch));
+ fprintf_unfiltered (file,
+ "gdbarch_dump: ax_pseudo_register_push_stack = <%s>\n",
+ host_address_to_string (gdbarch->ax_pseudo_register_push_stack));
+ fprintf_unfiltered (file,
"gdbarch_dump: believe_pcc_promotion = %s\n",
plongest (gdbarch->believe_pcc_promotion));
fprintf_unfiltered (file,
@@ -1741,6 +1759,54 @@ set_gdbarch_num_pseudo_regs (struct gdbarch *gdbarch,
}
int
+gdbarch_ax_pseudo_register_collect_p (struct gdbarch *gdbarch)
+{
+ gdb_assert (gdbarch != NULL);
+ return gdbarch->ax_pseudo_register_collect != NULL;
+}
+
+int
+gdbarch_ax_pseudo_register_collect (struct gdbarch *gdbarch, struct agent_expr *ax, int reg)
+{
+ gdb_assert (gdbarch != NULL);
+ gdb_assert (gdbarch->ax_pseudo_register_collect != NULL);
+ if (gdbarch_debug >= 2)
+ fprintf_unfiltered (gdb_stdlog, "gdbarch_ax_pseudo_register_collect called\n");
+ return gdbarch->ax_pseudo_register_collect (gdbarch, ax, reg);
+}
+
+void
+set_gdbarch_ax_pseudo_register_collect (struct gdbarch *gdbarch,
+ gdbarch_ax_pseudo_register_collect_ftype ax_pseudo_register_collect)
+{
+ gdbarch->ax_pseudo_register_collect = ax_pseudo_register_collect;
+}
+
+int
+gdbarch_ax_pseudo_register_push_stack_p (struct gdbarch *gdbarch)
+{
+ gdb_assert (gdbarch != NULL);
+ return gdbarch->ax_pseudo_register_push_stack != NULL;
+}
+
+int
+gdbarch_ax_pseudo_register_push_stack (struct gdbarch *gdbarch, struct agent_expr *ax, int reg)
+{
+ gdb_assert (gdbarch != NULL);
+ gdb_assert (gdbarch->ax_pseudo_register_push_stack != NULL);
+ if (gdbarch_debug >= 2)
+ fprintf_unfiltered (gdb_stdlog, "gdbarch_ax_pseudo_register_push_stack called\n");
+ return gdbarch->ax_pseudo_register_push_stack (gdbarch, ax, reg);
+}
+
+void
+set_gdbarch_ax_pseudo_register_push_stack (struct gdbarch *gdbarch,
+ gdbarch_ax_pseudo_register_push_stack_ftype ax_pseudo_register_push_stack)
+{
+ gdbarch->ax_pseudo_register_push_stack = ax_pseudo_register_push_stack;
+}
+
+int
gdbarch_sp_regnum (struct gdbarch *gdbarch)
{
gdb_assert (gdbarch != NULL);
diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index 443e1d5..4017f48 100644
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -53,6 +53,7 @@ struct target_desc;
struct displaced_step_closure;
struct core_regset_section;
struct syscall;
+struct agent_expr;
/* The architecture associated with the connection to the target.
@@ -232,6 +233,25 @@ extern void set_gdbarch_num_regs (struct gdbarch *gdbarch, int num_regs);
extern int gdbarch_num_pseudo_regs (struct gdbarch *gdbarch);
extern void set_gdbarch_num_pseudo_regs (struct gdbarch *gdbarch, int num_pseudo_regs);
+/* Assemble agent expression bytecode to collect pseudo-register REG.
+ Return -1 if something goes wrong, 0 otherwise. */
+
+extern int gdbarch_ax_pseudo_register_collect_p (struct gdbarch *gdbarch);
+
+typedef int (gdbarch_ax_pseudo_register_collect_ftype) (struct gdbarch *gdbarch, struct agent_expr *ax, int reg);
+extern int gdbarch_ax_pseudo_register_collect (struct gdbarch *gdbarch, struct agent_expr *ax, int reg);
+extern void set_gdbarch_ax_pseudo_register_collect (struct gdbarch *gdbarch, gdbarch_ax_pseudo_register_collect_ftype *ax_pseudo_register_collect);
+
+/* Assemble agent expression bytecode to push the value of pseudo-register
+ REG on the interpreter stack.
+ Return -1 if something goes wrong, 0 otherwise. */
+
+extern int gdbarch_ax_pseudo_register_push_stack_p (struct gdbarch *gdbarch);
+
+typedef int (gdbarch_ax_pseudo_register_push_stack_ftype) (struct gdbarch *gdbarch, struct agent_expr *ax, int reg);
+extern int gdbarch_ax_pseudo_register_push_stack (struct gdbarch *gdbarch, struct agent_expr *ax, int reg);
+extern void set_gdbarch_ax_pseudo_register_push_stack (struct gdbarch *gdbarch, gdbarch_ax_pseudo_register_push_stack_ftype *ax_pseudo_register_push_stack);
+
/* GDB's standard (or well known) register numbers. These can map onto
a real register or a pseudo (computed) register or not be defined at
all (-1).
diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index 5b66116..fe3a8d3 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -427,6 +427,15 @@ v:int:num_regs:::0:-1
# combinations of other registers, or they may be computed by GDB.
v:int:num_pseudo_regs:::0:0::0
+# Assemble agent expression bytecode to collect pseudo-register REG.
+# Return -1 if something goes wrong, 0 otherwise.
+M:int:ax_pseudo_register_collect:struct agent_expr *ax, int reg:ax, reg
+
+# Assemble agent expression bytecode to push the value of pseudo-register
+# REG on the interpreter stack.
+# Return -1 if something goes wrong, 0 otherwise.
+M:int:ax_pseudo_register_push_stack:struct agent_expr *ax, int reg:ax, reg
+
# GDB's standard (or well known) register numbers. These can map onto
# a real register or a pseudo (computed) register or not be defined at
# all (-1).
@@ -919,6 +928,7 @@ struct target_desc;
struct displaced_step_closure;
struct core_regset_section;
struct syscall;
+struct agent_expr;
/* The architecture associated with the connection to the target.
diff --git a/gdb/mips-tdep.c b/gdb/mips-tdep.c
index e6df5f5..9b384ac 100644
--- a/gdb/mips-tdep.c
+++ b/gdb/mips-tdep.c
@@ -58,6 +58,7 @@
#include "dwarf2-frame.h"
#include "user-regs.h"
#include "valprint.h"
+#include "ax.h"
static const struct objfile_data *mips_pdr_data;
@@ -616,6 +617,48 @@ mips_pseudo_register_write (struct gdbarch *gdbarch,
internal_error (__FILE__, __LINE__, _("bad register size"));
}
+static int
+mips_ax_pseudo_register_collect (struct gdbarch *gdbarch,
+ struct agent_expr *ax, int reg)
+{
+ int rawnum = reg % gdbarch_num_regs (gdbarch);
+ gdb_assert (reg >= gdbarch_num_regs (gdbarch)
+ && reg < 2 * gdbarch_num_regs (gdbarch));
+
+ ax_reg_mask (ax, rawnum);
+
+ return 0;
+}
+
+static int
+mips_ax_pseudo_register_push_stack (struct gdbarch *gdbarch,
+ struct agent_expr *ax, int reg)
+{
+ int rawnum = reg % gdbarch_num_regs (gdbarch);
+ gdb_assert (reg >= gdbarch_num_regs (gdbarch)
+ && reg < 2 * gdbarch_num_regs (gdbarch));
+ if (register_size (gdbarch, rawnum) >= register_size (gdbarch, reg))
+ {
+ ax_reg (ax, rawnum);
+
+ if (register_size (gdbarch, rawnum) > register_size (gdbarch, reg))
+ {
+ if (!gdbarch_tdep (gdbarch)->mips64_transfers_32bit_regs_p
+ || gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
+ {
+ ax_const_l (ax, 32);
+ ax_simple (ax, aop_lsh);
+ }
+ ax_const_l (ax, 32);
+ ax_simple (ax, aop_rsh_signed);
+ }
+ }
+ else
+ internal_error (__FILE__, __LINE__, _("bad register size"));
+
+ return 0;
+}
+
/* Table to translate MIPS16 register field to actual register number. */
static int mips16_to_32_reg[8] = { 16, 17, 2, 3, 4, 5, 6, 7 };
@@ -5933,6 +5976,11 @@ mips_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
set_gdbarch_pseudo_register_read (gdbarch, mips_pseudo_register_read);
set_gdbarch_pseudo_register_write (gdbarch, mips_pseudo_register_write);
+ set_gdbarch_ax_pseudo_register_collect (gdbarch,
+ mips_ax_pseudo_register_collect);
+ set_gdbarch_ax_pseudo_register_push_stack
+ (gdbarch, mips_ax_pseudo_register_push_stack);
+
set_gdbarch_elf_make_msymbol_special (gdbarch,
mips_elf_make_msymbol_special);
generated by cgit v1.1 at 2024-12-19 00:39:45 +0000