/* Target-dependent code for the Fujitsu FR-V, for GDB, the GNU Debugger.
- Copyright 2002, 2003 Free Software Foundation, Inc.
+
+ Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008
+ Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
+#include "gdb_string.h"
#include "inferior.h"
-#include "symfile.h" /* for entry_point_address */
#include "gdbcore.h"
#include "arch-utils.h"
#include "regcache.h"
+#include "frame.h"
+#include "frame-unwind.h"
+#include "frame-base.h"
+#include "trad-frame.h"
+#include "dis-asm.h"
+#include "gdb_assert.h"
+#include "sim-regno.h"
+#include "gdb/sim-frv.h"
+#include "opcodes/frv-desc.h" /* for the H_SPR_... enums */
+#include "symtab.h"
+#include "elf-bfd.h"
+#include "elf/frv.h"
+#include "osabi.h"
+#include "infcall.h"
+#include "solib.h"
+#include "frv-tdep.h"
extern void _initialize_frv_tdep (void);
-static gdbarch_init_ftype frv_gdbarch_init;
-
-static gdbarch_register_name_ftype frv_register_name;
-static gdbarch_register_raw_size_ftype frv_register_raw_size;
-static gdbarch_register_virtual_size_ftype frv_register_virtual_size;
-static gdbarch_register_virtual_type_ftype frv_register_virtual_type;
-static gdbarch_register_byte_ftype frv_register_byte;
-static gdbarch_breakpoint_from_pc_ftype frv_breakpoint_from_pc;
-static gdbarch_skip_prologue_ftype frv_skip_prologue;
-static gdbarch_deprecated_extract_return_value_ftype frv_extract_return_value;
-static gdbarch_deprecated_extract_struct_value_address_ftype frv_extract_struct_value_address;
-static gdbarch_use_struct_convention_ftype frv_use_struct_convention;
-static gdbarch_frameless_function_invocation_ftype frv_frameless_function_invocation;
-static gdbarch_init_extra_frame_info_ftype stupid_useless_init_extra_frame_info;
-static gdbarch_push_arguments_ftype frv_push_arguments;
-static gdbarch_saved_pc_after_call_ftype frv_saved_pc_after_call;
-
-static void frv_pop_frame_regular (struct frame_info *frame);
-
-/* Register numbers. You can change these as needed, but don't forget
- to update the simulator accordingly. */
-enum {
- /* The total number of registers we know exist. */
- frv_num_regs = 147,
-
- /* Register numbers 0 -- 63 are always reserved for general-purpose
- registers. The chip at hand may have less. */
- first_gpr_regnum = 0,
- sp_regnum = 1,
- fp_regnum = 2,
- struct_return_regnum = 3,
- last_gpr_regnum = 63,
-
- /* Register numbers 64 -- 127 are always reserved for floating-point
- registers. The chip at hand may have less. */
- first_fpr_regnum = 64,
- last_fpr_regnum = 127,
-
- /* Register numbers 128 on up are always reserved for special-purpose
- registers. */
- first_spr_regnum = 128,
- pc_regnum = 128,
- psr_regnum = 129,
- ccr_regnum = 130,
- cccr_regnum = 131,
- tbr_regnum = 135,
- brr_regnum = 136,
- dbar0_regnum = 137,
- dbar1_regnum = 138,
- dbar2_regnum = 139,
- dbar3_regnum = 140,
- lr_regnum = 145,
- lcr_regnum = 146,
- last_spr_regnum = 146
-};
-
-static LONGEST frv_call_dummy_words[] =
-{0};
-
-
-/* The contents of this structure can only be trusted after we've
- frv_frame_init_saved_regs on the frame. */
-struct frame_extra_info
+struct frv_unwind_cache /* was struct frame_extra_info */
{
- /* The offset from our frame pointer to our caller's stack
- pointer. */
- int fp_to_callers_sp_offset;
+ /* The previous frame's inner-most stack address. Used as this
+ frame ID's stack_addr. */
+ CORE_ADDR prev_sp;
- /* Non-zero if we've saved our return address on the stack yet.
- Zero if it's still sitting in the link register. */
- int lr_saved_on_stack;
- };
+ /* The frame's base, optionally used by the high-level debug info. */
+ CORE_ADDR base;
+ /* Table indicating the location of each and every register. */
+ struct trad_frame_saved_reg *saved_regs;
+ };
/* A structure describing a particular variant of the FRV.
We allocate and initialize one of these structures when we create
Fortran. */
struct gdbarch_tdep
{
+ /* Which ABI is in use? */
+ enum frv_abi frv_abi;
+
/* How many general-purpose registers does this variant have? */
int num_gprs;
char **register_names;
};
-#define CURRENT_VARIANT (gdbarch_tdep (current_gdbarch))
+/* Return the FR-V ABI associated with GDBARCH. */
+enum frv_abi
+frv_abi (struct gdbarch *gdbarch)
+{
+ return gdbarch_tdep (gdbarch)->frv_abi;
+}
+/* Fetch the interpreter and executable loadmap addresses (for shared
+ library support) for the FDPIC ABI. Return 0 if successful, -1 if
+ not. (E.g, -1 will be returned if the ABI isn't the FDPIC ABI.) */
+int
+frv_fdpic_loadmap_addresses (struct gdbarch *gdbarch, CORE_ADDR *interp_addr,
+ CORE_ADDR *exec_addr)
+{
+ if (frv_abi (gdbarch) != FRV_ABI_FDPIC)
+ return -1;
+ else
+ {
+ struct regcache *regcache = get_current_regcache ();
+
+ if (interp_addr != NULL)
+ {
+ ULONGEST val;
+ regcache_cooked_read_unsigned (regcache,
+ fdpic_loadmap_interp_regnum, &val);
+ *interp_addr = val;
+ }
+ if (exec_addr != NULL)
+ {
+ ULONGEST val;
+ regcache_cooked_read_unsigned (regcache,
+ fdpic_loadmap_exec_regnum, &val);
+ *exec_addr = val;
+ }
+ return 0;
+ }
+}
/* Allocate a new variant structure, and set up default values for all
the fields. */
var = xmalloc (sizeof (*var));
memset (var, 0, sizeof (*var));
+ var->frv_abi = FRV_ABI_EABI;
var->num_gprs = 64;
var->num_fprs = 64;
var->num_hw_watchpoints = 0;
/* By default, don't supply any general-purpose or floating-point
register names. */
- var->register_names = (char **) xmalloc (frv_num_regs * sizeof (char *));
- for (r = 0; r < frv_num_regs; r++)
+ var->register_names
+ = (char **) xmalloc ((frv_num_regs + frv_num_pseudo_regs)
+ * sizeof (char *));
+ for (r = 0; r < frv_num_regs + frv_num_pseudo_regs; r++)
var->register_names[r] = "";
- /* Do, however, supply default names for the special-purpose
+ /* Do, however, supply default names for the known special-purpose
registers. */
- for (r = first_spr_regnum; r <= last_spr_regnum; ++r)
- {
- sprintf (buf, "x%d", r);
- var->register_names[r] = xstrdup (buf);
- }
var->register_names[pc_regnum] = "pc";
var->register_names[lr_regnum] = "lr";
var->register_names[dbar2_regnum] = "dbar2";
var->register_names[dbar3_regnum] = "dbar3";
+ /* iacc0 (Only found on MB93405.) */
+ var->register_names[iacc0h_regnum] = "iacc0h";
+ var->register_names[iacc0l_regnum] = "iacc0l";
+ var->register_names[iacc0_regnum] = "iacc0";
+
+ /* fsr0 (Found on FR555 and FR501.) */
+ var->register_names[fsr0_regnum] = "fsr0";
+
+ /* acc0 - acc7. The architecture provides for the possibility of many
+ more (up to 64 total), but we don't want to make that big of a hole
+ in the G packet. If we need more in the future, we'll add them
+ elsewhere. */
+ for (r = acc0_regnum; r <= acc7_regnum; r++)
+ {
+ char *buf;
+ buf = xstrprintf ("acc%d", r - acc0_regnum);
+ var->register_names[r] = buf;
+ }
+
+ /* accg0 - accg7: These are one byte registers. The remote protocol
+ provides the raw values packed four into a slot. accg0123 and
+ accg4567 correspond to accg0 - accg3 and accg4-accg7 respectively.
+ We don't provide names for accg0123 and accg4567 since the user will
+ likely not want to see these raw values. */
+
+ for (r = accg0_regnum; r <= accg7_regnum; r++)
+ {
+ char *buf;
+ buf = xstrprintf ("accg%d", r - accg0_regnum);
+ var->register_names[r] = buf;
+ }
+
+ /* msr0 and msr1. */
+
+ var->register_names[msr0_regnum] = "msr0";
+ var->register_names[msr1_regnum] = "msr1";
+
+ /* gner and fner registers. */
+ var->register_names[gner0_regnum] = "gner0";
+ var->register_names[gner1_regnum] = "gner1";
+ var->register_names[fner0_regnum] = "fner0";
+ var->register_names[fner1_regnum] = "fner1";
+
return var;
}
}
}
+static void
+set_variant_abi_fdpic (struct gdbarch_tdep *var)
+{
+ var->frv_abi = FRV_ABI_FDPIC;
+ var->register_names[fdpic_loadmap_exec_regnum] = xstrdup ("loadmap_exec");
+ var->register_names[fdpic_loadmap_interp_regnum] = xstrdup ("loadmap_interp");
+}
+
+static void
+set_variant_scratch_registers (struct gdbarch_tdep *var)
+{
+ var->register_names[scr0_regnum] = xstrdup ("scr0");
+ var->register_names[scr1_regnum] = xstrdup ("scr1");
+ var->register_names[scr2_regnum] = xstrdup ("scr2");
+ var->register_names[scr3_regnum] = xstrdup ("scr3");
+}
static const char *
-frv_register_name (int reg)
+frv_register_name (struct gdbarch *gdbarch, int reg)
{
if (reg < 0)
return "?toosmall?";
- if (reg >= frv_num_regs)
+ if (reg >= frv_num_regs + frv_num_pseudo_regs)
return "?toolarge?";
- return CURRENT_VARIANT->register_names[reg];
+ return gdbarch_tdep (gdbarch)->register_names[reg];
}
-static int
-frv_register_raw_size (int reg)
+static struct type *
+frv_register_type (struct gdbarch *gdbarch, int reg)
{
- return 4;
+ if (reg >= first_fpr_regnum && reg <= last_fpr_regnum)
+ return builtin_type_float;
+ else if (reg == iacc0_regnum)
+ return builtin_type_int64;
+ else
+ return builtin_type_int32;
}
-static int
-frv_register_virtual_size (int reg)
+static void
+frv_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
+ int reg, gdb_byte *buffer)
{
- return 4;
+ if (reg == iacc0_regnum)
+ {
+ regcache_raw_read (regcache, iacc0h_regnum, buffer);
+ regcache_raw_read (regcache, iacc0l_regnum, (bfd_byte *) buffer + 4);
+ }
+ else if (accg0_regnum <= reg && reg <= accg7_regnum)
+ {
+ /* The accg raw registers have four values in each slot with the
+ lowest register number occupying the first byte. */
+
+ int raw_regnum = accg0123_regnum + (reg - accg0_regnum) / 4;
+ int byte_num = (reg - accg0_regnum) % 4;
+ bfd_byte buf[4];
+
+ regcache_raw_read (regcache, raw_regnum, buf);
+ memset (buffer, 0, 4);
+ /* FR-V is big endian, so put the requested byte in the first byte
+ of the buffer allocated to hold the pseudo-register. */
+ ((bfd_byte *) buffer)[0] = buf[byte_num];
+ }
}
-static struct type *
-frv_register_virtual_type (int reg)
+static void
+frv_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
+ int reg, const gdb_byte *buffer)
{
- if (reg >= 64 && reg <= 127)
- return builtin_type_float;
- else
- return builtin_type_int;
+ if (reg == iacc0_regnum)
+ {
+ regcache_raw_write (regcache, iacc0h_regnum, buffer);
+ regcache_raw_write (regcache, iacc0l_regnum, (bfd_byte *) buffer + 4);
+ }
+ else if (accg0_regnum <= reg && reg <= accg7_regnum)
+ {
+ /* The accg raw registers have four values in each slot with the
+ lowest register number occupying the first byte. */
+
+ int raw_regnum = accg0123_regnum + (reg - accg0_regnum) / 4;
+ int byte_num = (reg - accg0_regnum) % 4;
+ char buf[4];
+
+ regcache_raw_read (regcache, raw_regnum, buf);
+ buf[byte_num] = ((bfd_byte *) buffer)[0];
+ regcache_raw_write (regcache, raw_regnum, buf);
+ }
}
static int
-frv_register_byte (int reg)
+frv_register_sim_regno (struct gdbarch *gdbarch, int reg)
{
- return (reg * 4);
+ static const int spr_map[] =
+ {
+ H_SPR_PSR, /* psr_regnum */
+ H_SPR_CCR, /* ccr_regnum */
+ H_SPR_CCCR, /* cccr_regnum */
+ -1, /* fdpic_loadmap_exec_regnum */
+ -1, /* fdpic_loadmap_interp_regnum */
+ -1, /* 134 */
+ H_SPR_TBR, /* tbr_regnum */
+ H_SPR_BRR, /* brr_regnum */
+ H_SPR_DBAR0, /* dbar0_regnum */
+ H_SPR_DBAR1, /* dbar1_regnum */
+ H_SPR_DBAR2, /* dbar2_regnum */
+ H_SPR_DBAR3, /* dbar3_regnum */
+ H_SPR_SCR0, /* scr0_regnum */
+ H_SPR_SCR1, /* scr1_regnum */
+ H_SPR_SCR2, /* scr2_regnum */
+ H_SPR_SCR3, /* scr3_regnum */
+ H_SPR_LR, /* lr_regnum */
+ H_SPR_LCR, /* lcr_regnum */
+ H_SPR_IACC0H, /* iacc0h_regnum */
+ H_SPR_IACC0L, /* iacc0l_regnum */
+ H_SPR_FSR0, /* fsr0_regnum */
+ /* FIXME: Add infrastructure for fetching/setting ACC and ACCG regs. */
+ -1, /* acc0_regnum */
+ -1, /* acc1_regnum */
+ -1, /* acc2_regnum */
+ -1, /* acc3_regnum */
+ -1, /* acc4_regnum */
+ -1, /* acc5_regnum */
+ -1, /* acc6_regnum */
+ -1, /* acc7_regnum */
+ -1, /* acc0123_regnum */
+ -1, /* acc4567_regnum */
+ H_SPR_MSR0, /* msr0_regnum */
+ H_SPR_MSR1, /* msr1_regnum */
+ H_SPR_GNER0, /* gner0_regnum */
+ H_SPR_GNER1, /* gner1_regnum */
+ H_SPR_FNER0, /* fner0_regnum */
+ H_SPR_FNER1, /* fner1_regnum */
+ };
+
+ gdb_assert (reg >= 0 && reg < gdbarch_num_regs (gdbarch));
+
+ if (first_gpr_regnum <= reg && reg <= last_gpr_regnum)
+ return reg - first_gpr_regnum + SIM_FRV_GR0_REGNUM;
+ else if (first_fpr_regnum <= reg && reg <= last_fpr_regnum)
+ return reg - first_fpr_regnum + SIM_FRV_FR0_REGNUM;
+ else if (pc_regnum == reg)
+ return SIM_FRV_PC_REGNUM;
+ else if (reg >= first_spr_regnum
+ && reg < first_spr_regnum + sizeof (spr_map) / sizeof (spr_map[0]))
+ {
+ int spr_reg_offset = spr_map[reg - first_spr_regnum];
+
+ if (spr_reg_offset < 0)
+ return SIM_REGNO_DOES_NOT_EXIST;
+ else
+ return SIM_FRV_SPR0_REGNUM + spr_reg_offset;
+ }
+
+ internal_error (__FILE__, __LINE__, _("Bad register number %d"), reg);
}
static const unsigned char *
-frv_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenp)
+frv_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, int *lenp)
{
static unsigned char breakpoint[] = {0xc0, 0x70, 0x00, 0x01};
*lenp = sizeof (breakpoint);
return breakpoint;
}
+/* Define the maximum number of instructions which may be packed into a
+ bundle (VLIW instruction). */
+static const int max_instrs_per_bundle = 8;
+
+/* Define the size (in bytes) of an FR-V instruction. */
+static const int frv_instr_size = 4;
+
+/* Adjust a breakpoint's address to account for the FR-V architecture's
+ constraint that a break instruction must not appear as any but the
+ first instruction in the bundle. */
static CORE_ADDR
-frv_frame_chain (struct frame_info *frame)
+frv_adjust_breakpoint_address (struct gdbarch *gdbarch, CORE_ADDR bpaddr)
{
- CORE_ADDR saved_fp_addr;
+ int count = max_instrs_per_bundle;
+ CORE_ADDR addr = bpaddr - frv_instr_size;
+ CORE_ADDR func_start = get_pc_function_start (bpaddr);
+
+ /* Find the end of the previous packing sequence. This will be indicated
+ by either attempting to access some inaccessible memory or by finding
+ an instruction word whose packing bit is set to one. */
+ while (count-- > 0 && addr >= func_start)
+ {
+ char instr[frv_instr_size];
+ int status;
- if (frame->saved_regs && frame->saved_regs[fp_regnum] != 0)
- saved_fp_addr = frame->saved_regs[fp_regnum];
- else
- /* Just assume it was saved in the usual place. */
- saved_fp_addr = frame->frame;
+ status = read_memory_nobpt (addr, instr, sizeof instr);
- return read_memory_integer (saved_fp_addr, 4);
-}
+ if (status != 0)
+ break;
-static CORE_ADDR
-frv_frame_saved_pc (struct frame_info *frame)
-{
- frv_frame_init_saved_regs (frame);
-
- /* Perhaps the prologue analyzer recorded where it was stored.
- (As of 14 Oct 2001, it never does.) */
- if (frame->saved_regs && frame->saved_regs[pc_regnum] != 0)
- return read_memory_integer (frame->saved_regs[pc_regnum], 4);
-
- /* If the prologue analyzer tells us the link register was saved on
- the stack, get it from there. */
- if (frame->extra_info->lr_saved_on_stack)
- return read_memory_integer (frame->frame + 8, 4);
-
- /* Otherwise, it's still in LR.
- However, if FRAME isn't the youngest frame, this is kind of
- suspicious --- if this frame called somebody else, then its LR
- has certainly been overwritten. */
- if (! frame->next)
- return read_register (lr_regnum);
-
- /* By default, assume it's saved in the standard place, relative to
- the frame pointer. */
- return read_memory_integer (frame->frame + 8, 4);
+ /* This is a big endian architecture, so byte zero will have most
+ significant byte. The most significant bit of this byte is the
+ packing bit. */
+ if (instr[0] & 0x80)
+ break;
+
+ addr -= frv_instr_size;
+ }
+
+ if (count > 0)
+ bpaddr = addr + frv_instr_size;
+
+ return bpaddr;
}
return (8 <= reg && reg <= 13);
}
-
/* Scan an FR-V prologue, starting at PC, until frame->PC.
If FRAME is non-zero, fill in its saved_regs with appropriate addresses.
We assume FRAME's saved_regs array has already been allocated and cleared.
arguments in any frame but the top, you'll need to do this serious
prologue analysis. */
static CORE_ADDR
-frv_analyze_prologue (CORE_ADDR pc, struct frame_info *frame)
+frv_analyze_prologue (CORE_ADDR pc, struct frame_info *next_frame,
+ struct frv_unwind_cache *info)
{
/* When writing out instruction bitpatterns, we use the following
letters to label instruction fields:
/* Total size of frame prior to any alloca operations. */
int framesize = 0;
+ /* Flag indicating if lr has been saved on the stack. */
+ int lr_saved_on_stack = 0;
+
/* The number of the general-purpose register we saved the return
address ("link register") in, or -1 if we haven't moved it yet. */
int lr_save_reg = -1;
- /* Non-zero iff we've saved the LR onto the stack. */
- int lr_saved_on_stack = 0;
+ /* Offset (from sp) at which lr has been saved on the stack. */
+
+ int lr_sp_offset = 0;
/* If gr_saved[i] is non-zero, then we've noticed that general
register i has been saved at gr_sp_offset[i] from the stack
char gr_saved[64];
int gr_sp_offset[64];
+ /* The address of the most recently scanned prologue instruction. */
+ CORE_ADDR last_prologue_pc;
+
+ /* The address of the next instruction. */
+ CORE_ADDR next_pc;
+
+ /* The upper bound to of the pc values to scan. */
+ CORE_ADDR lim_pc;
+
memset (gr_saved, 0, sizeof (gr_saved));
- while (! frame || pc < frame->pc)
+ last_prologue_pc = pc;
+
+ /* Try to compute an upper limit (on how far to scan) based on the
+ line number info. */
+ lim_pc = skip_prologue_using_sal (pc);
+ /* If there's no line number info, lim_pc will be 0. In that case,
+ set the limit to be 100 instructions away from pc. Hopefully, this
+ will be far enough away to account for the entire prologue. Don't
+ worry about overshooting the end of the function. The scan loop
+ below contains some checks to avoid scanning unreasonably far. */
+ if (lim_pc == 0)
+ lim_pc = pc + 400;
+
+ /* If we have a frame, we don't want to scan past the frame's pc. This
+ will catch those cases where the pc is in the prologue. */
+ if (next_frame)
{
- LONGEST op = read_memory_integer (pc, 4);
+ CORE_ADDR frame_pc = frame_pc_unwind (next_frame);
+ if (frame_pc < lim_pc)
+ lim_pc = frame_pc;
+ }
+
+ /* Scan the prologue. */
+ while (pc < lim_pc)
+ {
+ char buf[frv_instr_size];
+ LONGEST op;
+
+ if (target_read_memory (pc, buf, sizeof buf) != 0)
+ break;
+ op = extract_signed_integer (buf, sizeof buf);
+
+ next_pc = pc + 4;
/* The tests in this chain of ifs should be in order of
decreasing selectivity, so that more particular patterns get
to fire before less particular patterns. */
+ /* Some sort of control transfer instruction: stop scanning prologue.
+ Integer Conditional Branch:
+ X XXXX XX 0000110 XX XXXXXXXXXXXXXXXX
+ Floating-point / media Conditional Branch:
+ X XXXX XX 0000111 XX XXXXXXXXXXXXXXXX
+ LCR Conditional Branch to LR
+ X XXXX XX 0001110 XX XX 001 X XXXXXXXXXX
+ Integer conditional Branches to LR
+ X XXXX XX 0001110 XX XX 010 X XXXXXXXXXX
+ X XXXX XX 0001110 XX XX 011 X XXXXXXXXXX
+ Floating-point/Media Branches to LR
+ X XXXX XX 0001110 XX XX 110 X XXXXXXXXXX
+ X XXXX XX 0001110 XX XX 111 X XXXXXXXXXX
+ Jump and Link
+ X XXXXX X 0001100 XXXXXX XXXXXX XXXXXX
+ X XXXXX X 0001101 XXXXXX XXXXXX XXXXXX
+ Call
+ X XXXXXX 0001111 XXXXXXXXXXXXXXXXXX
+ Return from Trap
+ X XXXXX X 0000101 XXXXXX XXXXXX XXXXXX
+ Integer Conditional Trap
+ X XXXX XX 0000100 XXXXXX XXXX 00 XXXXXX
+ X XXXX XX 0011100 XXXXXX XXXXXXXXXXXX
+ Floating-point /media Conditional Trap
+ X XXXX XX 0000100 XXXXXX XXXX 01 XXXXXX
+ X XXXX XX 0011101 XXXXXX XXXXXXXXXXXX
+ Break
+ X XXXX XX 0000100 XXXXXX XXXX 11 XXXXXX
+ Media Trap
+ X XXXX XX 0000100 XXXXXX XXXX 10 XXXXXX */
+ if ((op & 0x01d80000) == 0x00180000 /* Conditional branches and Call */
+ || (op & 0x01f80000) == 0x00300000 /* Jump and Link */
+ || (op & 0x01f80000) == 0x00100000 /* Return from Trap, Trap */
+ || (op & 0x01f80000) == 0x00700000) /* Trap immediate */
+ {
+ /* Stop scanning; not in prologue any longer. */
+ break;
+ }
+
+ /* Loading something from memory into fp probably means that
+ we're in the epilogue. Stop scanning the prologue.
+ ld @(GRi, GRk), fp
+ X 000010 0000010 XXXXXX 000100 XXXXXX
+ ldi @(GRi, d12), fp
+ X 000010 0110010 XXXXXX XXXXXXXXXXXX */
+ else if ((op & 0x7ffc0fc0) == 0x04080100
+ || (op & 0x7ffc0000) == 0x04c80000)
+ {
+ break;
+ }
+
/* Setting the FP from the SP:
ori sp, 0, fp
P 000010 0100010 000001 000000000000 = 0x04881000
0 111111 1111111 111111 111111111111 = 0x7fffffff
. . . . . . . .
We treat this as part of the prologue. */
- if ((op & 0x7fffffff) == 0x04881000)
+ else if ((op & 0x7fffffff) == 0x04881000)
{
fp_set = 1;
fp_offset = 0;
+ last_prologue_pc = next_pc;
}
/* Move the link register to the scratch register grJ, before saving:
/* If we're moving it to a scratch register, that's fine. */
if (is_caller_saves_reg (gr_j))
- lr_save_reg = gr_j;
- /* Otherwise it's not a prologue instruction that we
- recognize. */
- else
- break;
+ {
+ lr_save_reg = gr_j;
+ last_prologue_pc = next_pc;
+ }
}
/* To save multiple callee-saves registers on the stack, at
gr_saved[gr_k + i] = 1;
gr_sp_offset[gr_k + i] = 4 * i;
}
+ last_prologue_pc = next_pc;
}
- else
- /* It's not a prologue instruction. */
- break;
}
/* Adjusting the stack pointer. (The stack pointer is GR1.)
We treat this as part of the prologue. */
else if ((op & 0x7ffff000) == 0x02401000)
{
- /* Sign-extend the twelve-bit field.
- (Isn't there a better way to do this?) */
- int s = (((op & 0xfff) - 0x800) & 0xfff) - 0x800;
+ if (framesize == 0)
+ {
+ /* Sign-extend the twelve-bit field.
+ (Isn't there a better way to do this?) */
+ int s = (((op & 0xfff) - 0x800) & 0xfff) - 0x800;
- framesize -= s;
+ framesize -= s;
+ last_prologue_pc = pc;
+ }
+ else
+ {
+ /* If the prologue is being adjusted again, we've
+ likely gone too far; i.e. we're probably in the
+ epilogue. */
+ break;
+ }
}
/* Setting the FP to a constant distance from the SP:
int s = (((op & 0xfff) - 0x800) & 0xfff) - 0x800;
fp_set = 1;
fp_offset = s;
+ last_prologue_pc = pc;
}
/* To spill an argument register to a scratch register:
{
int gr_i = ((op >> 12) & 0x3f);
- /* If the source isn't an arg register, then this isn't a
- prologue instruction. */
- if (! is_argument_reg (gr_i))
- break;
+ /* Make sure that the source is an arg register; if it is, we'll
+ treat it as a prologue instruction. */
+ if (is_argument_reg (gr_i))
+ last_prologue_pc = next_pc;
}
/* To spill 16-bit values to the stack:
{
int gr_k = ((op >> 25) & 0x3f);
- if (! is_argument_reg (gr_k))
- break; /* Source isn't an arg register. */
+ /* Make sure that GRk is really an argument register; treat
+ it as a prologue instruction if so. */
+ if (is_argument_reg (gr_k))
+ last_prologue_pc = next_pc;
}
/* To save multiple callee-saves register on the stack, at a
gr_saved[gr_k + i] = 1;
gr_sp_offset[gr_k + i] = s + (4 * i);
}
+ last_prologue_pc = next_pc;
}
- else
- /* It's not a prologue instruction. */
- break;
}
/* Storing any kind of integer register at any constant offset
/* If the address isn't relative to the SP or FP, it's not a
prologue instruction. */
if (gr_i != sp_regnum && gr_i != fp_regnum)
- break;
+ {
+ /* Do nothing; not a prologue instruction. */
+ }
/* Saving the old FP in the new frame (relative to the SP). */
- if (gr_k == fp_regnum && gr_i == sp_regnum)
- ;
+ else if (gr_k == fp_regnum && gr_i == sp_regnum)
+ {
+ gr_saved[fp_regnum] = 1;
+ gr_sp_offset[fp_regnum] = offset;
+ last_prologue_pc = next_pc;
+ }
/* Saving callee-saves register(s) on the stack, relative to
the SP. */
&& is_callee_saves_reg (gr_k))
{
gr_saved[gr_k] = 1;
- gr_sp_offset[gr_k] = offset;
+ if (gr_i == sp_regnum)
+ gr_sp_offset[gr_k] = offset;
+ else
+ gr_sp_offset[gr_k] = offset + fp_offset;
+ last_prologue_pc = next_pc;
}
/* Saving the scratch register holding the return address. */
else if (lr_save_reg != -1
&& gr_k == lr_save_reg)
- lr_saved_on_stack = 1;
+ {
+ lr_saved_on_stack = 1;
+ if (gr_i == sp_regnum)
+ lr_sp_offset = offset;
+ else
+ lr_sp_offset = offset + fp_offset;
+ last_prologue_pc = next_pc;
+ }
/* Spilling int-sized arguments to the stack. */
else if (is_argument_reg (gr_k))
- ;
-
- /* It's not a store instruction we recognize, so this must
- be the end of the prologue. */
- else
- break;
+ last_prologue_pc = next_pc;
}
-
- /* It's not any instruction we recognize, so this must be the end
- of the prologue. */
- else
- break;
-
- pc += 4;
+ pc = next_pc;
}
- if (frame)
+ if (next_frame && info)
{
- frame->extra_info->lr_saved_on_stack = lr_saved_on_stack;
+ int i;
+ ULONGEST this_base;
/* If we know the relationship between the stack and frame
pointers, record the addresses of the registers we noticed.
because instructions may save relative to the SP, but we need
their addresses relative to the FP. */
if (fp_set)
- {
- int i;
+ this_base = frame_unwind_register_unsigned (next_frame, fp_regnum);
+ else
+ this_base = frame_unwind_register_unsigned (next_frame, sp_regnum);
- for (i = 0; i < 64; i++)
- if (gr_saved[i])
- frame->saved_regs[i] = (frame->frame
- - fp_offset + gr_sp_offset[i]);
+ for (i = 0; i < 64; i++)
+ if (gr_saved[i])
+ info->saved_regs[i].addr = this_base - fp_offset + gr_sp_offset[i];
- frame->extra_info->fp_to_callers_sp_offset = framesize - fp_offset;
- }
+ info->prev_sp = this_base - fp_offset + framesize;
+ info->base = this_base;
+
+ /* If LR was saved on the stack, record its location. */
+ if (lr_saved_on_stack)
+ info->saved_regs[lr_regnum].addr = this_base - fp_offset + lr_sp_offset;
+
+ /* The call instruction moves the caller's PC in the callee's LR.
+ Since this is an unwind, do the reverse. Copy the location of LR
+ into PC (the address / regnum) so that a request for PC will be
+ converted into a request for the LR. */
+ info->saved_regs[pc_regnum] = info->saved_regs[lr_regnum];
+
+ /* Save the previous frame's computed SP value. */
+ trad_frame_set_value (info->saved_regs, sp_regnum, info->prev_sp);
}
- return pc;
+ return last_prologue_pc;
}
static CORE_ADDR
-frv_skip_prologue (CORE_ADDR pc)
+frv_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
{
CORE_ADDR func_addr, func_end, new_pc;
If we didn't find a real source location past that, then
do a full analysis of the prologue. */
if (new_pc < pc + 20)
- new_pc = frv_analyze_prologue (pc, 0);
+ new_pc = frv_analyze_prologue (pc, 0, 0);
return new_pc;
}
-static void
-frv_frame_init_saved_regs (struct frame_info *frame)
-{
- if (frame->saved_regs)
- return;
-
- frame_saved_regs_zalloc (frame);
- frame->saved_regs[fp_regnum] = frame->frame;
- /* Find the beginning of this function, so we can analyze its
- prologue. */
- {
- CORE_ADDR func_addr, func_end;
+static struct frv_unwind_cache *
+frv_frame_unwind_cache (struct frame_info *next_frame,
+ void **this_prologue_cache)
+{
+ struct gdbarch *gdbarch = get_frame_arch (next_frame);
+ CORE_ADDR pc;
+ ULONGEST this_base;
+ struct frv_unwind_cache *info;
- if (find_pc_partial_function (frame->pc, NULL, &func_addr, &func_end))
- frv_analyze_prologue (func_addr, frame);
- }
-}
+ if ((*this_prologue_cache))
+ return (*this_prologue_cache);
-/* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of
- EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc
- and TYPE is the type (which is known to be struct, union or array).
+ info = FRAME_OBSTACK_ZALLOC (struct frv_unwind_cache);
+ (*this_prologue_cache) = info;
+ info->saved_regs = trad_frame_alloc_saved_regs (next_frame);
- The frv returns all structs in memory. */
+ /* Prologue analysis does the rest... */
+ frv_analyze_prologue (frame_func_unwind (next_frame, NORMAL_FRAME),
+ next_frame, info);
-static int
-frv_use_struct_convention (int gcc_p, struct type *type)
-{
- return 1;
+ return info;
}
static void
-frv_extract_return_value (struct type *type, char *regbuf, char *valbuf)
+frv_extract_return_value (struct type *type, struct regcache *regcache,
+ gdb_byte *valbuf)
{
- memcpy (valbuf, (regbuf
- + frv_register_byte (8)
- + (TYPE_LENGTH (type) < 4 ? 4 - TYPE_LENGTH (type) : 0)),
- TYPE_LENGTH (type));
+ int len = TYPE_LENGTH (type);
+
+ if (len <= 4)
+ {
+ ULONGEST gpr8_val;
+ regcache_cooked_read_unsigned (regcache, 8, &gpr8_val);
+ store_unsigned_integer (valbuf, len, gpr8_val);
+ }
+ else if (len == 8)
+ {
+ ULONGEST regval;
+ regcache_cooked_read_unsigned (regcache, 8, ®val);
+ store_unsigned_integer (valbuf, 4, regval);
+ regcache_cooked_read_unsigned (regcache, 9, ®val);
+ store_unsigned_integer ((bfd_byte *) valbuf + 4, 4, regval);
+ }
+ else
+ internal_error (__FILE__, __LINE__, _("Illegal return value length: %d"), len);
}
static CORE_ADDR
-frv_extract_struct_value_address (char *regbuf)
+frv_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
{
- return extract_unsigned_integer (regbuf + frv_register_byte (struct_return_regnum),
- 4);
+ /* Require dword alignment. */
+ return align_down (sp, 8);
}
-static void
-frv_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
+static CORE_ADDR
+find_func_descr (struct gdbarch *gdbarch, CORE_ADDR entry_point)
{
- write_register (struct_return_regnum, addr);
-}
+ CORE_ADDR descr;
+ char valbuf[4];
+ CORE_ADDR start_addr;
-static int
-frv_frameless_function_invocation (struct frame_info *frame)
-{
- return frameless_look_for_prologue (frame);
+ /* If we can't find the function in the symbol table, then we assume
+ that the function address is already in descriptor form. */
+ if (!find_pc_partial_function (entry_point, NULL, &start_addr, NULL)
+ || entry_point != start_addr)
+ return entry_point;
+
+ descr = frv_fdpic_find_canonical_descriptor (entry_point);
+
+ if (descr != 0)
+ return descr;
+
+ /* Construct a non-canonical descriptor from space allocated on
+ the stack. */
+
+ descr = value_as_long (value_allocate_space_in_inferior (8));
+ store_unsigned_integer (valbuf, 4, entry_point);
+ write_memory (descr, valbuf, 4);
+ store_unsigned_integer (valbuf, 4,
+ frv_fdpic_find_global_pointer (entry_point));
+ write_memory (descr + 4, valbuf, 4);
+ return descr;
}
static CORE_ADDR
-frv_saved_pc_after_call (struct frame_info *frame)
+frv_convert_from_func_ptr_addr (struct gdbarch *gdbarch, CORE_ADDR addr,
+ struct target_ops *targ)
{
- return read_register (lr_regnum);
-}
+ CORE_ADDR entry_point;
+ CORE_ADDR got_address;
-static void
-frv_init_extra_frame_info (int fromleaf, struct frame_info *frame)
-{
- frame_extra_info_zalloc (frame, sizeof (struct frame_extra_info));
- frame->extra_info->fp_to_callers_sp_offset = 0;
- frame->extra_info->lr_saved_on_stack = 0;
-}
+ entry_point = get_target_memory_unsigned (targ, addr, 4);
+ got_address = get_target_memory_unsigned (targ, addr + 4, 4);
-#define ROUND_UP(n,a) (((n)+(a)-1) & ~((a)-1))
-#define ROUND_DOWN(n,a) ((n) & ~((a)-1))
+ if (got_address == frv_fdpic_find_global_pointer (entry_point))
+ return entry_point;
+ else
+ return addr;
+}
static CORE_ADDR
-frv_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr)
+frv_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
+ struct regcache *regcache, CORE_ADDR bp_addr,
+ int nargs, struct value **args, CORE_ADDR sp,
+ int struct_return, CORE_ADDR struct_addr)
{
int argreg;
int argnum;
CORE_ADDR regval;
int stack_space;
int stack_offset;
+ enum frv_abi abi = frv_abi (gdbarch);
+ CORE_ADDR func_addr = find_function_addr (function, NULL);
#if 0
printf("Push %d args at sp = %x, struct_return=%d (%x)\n",
stack_space = 0;
for (argnum = 0; argnum < nargs; ++argnum)
- stack_space += ROUND_UP (TYPE_LENGTH (VALUE_TYPE (args[argnum])), 4);
+ stack_space += align_up (TYPE_LENGTH (value_type (args[argnum])), 4);
stack_space -= (6 * 4);
if (stack_space > 0)
sp -= stack_space;
/* Make sure stack is dword aligned. */
- sp = ROUND_DOWN (sp, 8);
+ sp = align_down (sp, 8);
stack_offset = 0;
argreg = 8;
if (struct_return)
- write_register (struct_return_regnum, struct_addr);
+ regcache_cooked_write_unsigned (regcache, struct_return_regnum,
+ struct_addr);
for (argnum = 0; argnum < nargs; ++argnum)
{
arg = args[argnum];
- arg_type = check_typedef (VALUE_TYPE (arg));
+ arg_type = check_typedef (value_type (arg));
len = TYPE_LENGTH (arg_type);
typecode = TYPE_CODE (arg_type);
len = 4;
val = valbuf;
}
+ else if (abi == FRV_ABI_FDPIC
+ && len == 4
+ && typecode == TYPE_CODE_PTR
+ && TYPE_CODE (TYPE_TARGET_TYPE (arg_type)) == TYPE_CODE_FUNC)
+ {
+ /* The FDPIC ABI requires function descriptors to be passed instead
+ of entry points. */
+ store_unsigned_integer
+ (valbuf, 4,
+ find_func_descr (gdbarch,
+ extract_unsigned_integer (value_contents (arg),
+ 4)));
+ typecode = TYPE_CODE_PTR;
+ len = 4;
+ val = valbuf;
+ }
else
{
- val = (char *) VALUE_CONTENTS (arg);
+ val = (char *) value_contents (arg);
}
while (len > 0)
printf(" Argnum %d data %x -> reg %d\n",
argnum, (int) regval, argreg);
#endif
- write_register (argreg, regval);
+ regcache_cooked_write_unsigned (regcache, argreg, regval);
++argreg;
}
else
argnum, *((int *)val), stack_offset, (int) (sp + stack_offset));
#endif
write_memory (sp + stack_offset, val, partial_len);
- stack_offset += ROUND_UP(partial_len, 4);
+ stack_offset += align_up (partial_len, 4);
}
len -= partial_len;
val += partial_len;
}
}
- return sp;
-}
-static CORE_ADDR
-frv_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
-{
- write_register (lr_regnum, CALL_DUMMY_ADDRESS ());
+ /* Set the return address. For the frv, the return breakpoint is
+ always at BP_ADDR. */
+ regcache_cooked_write_unsigned (regcache, lr_regnum, bp_addr);
+
+ if (abi == FRV_ABI_FDPIC)
+ {
+ /* Set the GOT register for the FDPIC ABI. */
+ regcache_cooked_write_unsigned
+ (regcache, first_gpr_regnum + 15,
+ frv_fdpic_find_global_pointer (func_addr));
+ }
+
+ /* Finally, update the SP register. */
+ regcache_cooked_write_unsigned (regcache, sp_regnum, sp);
+
return sp;
}
static void
-frv_store_return_value (struct type *type, char *valbuf)
+frv_store_return_value (struct type *type, struct regcache *regcache,
+ const gdb_byte *valbuf)
{
- int length = TYPE_LENGTH (type);
- int reg8_offset = frv_register_byte (8);
-
- if (length <= 4)
- deprecated_write_register_bytes (reg8_offset + (4 - length), valbuf,
- length);
- else if (length == 8)
- deprecated_write_register_bytes (reg8_offset, valbuf, length);
+ int len = TYPE_LENGTH (type);
+
+ if (len <= 4)
+ {
+ bfd_byte val[4];
+ memset (val, 0, sizeof (val));
+ memcpy (val + (4 - len), valbuf, len);
+ regcache_cooked_write (regcache, 8, val);
+ }
+ else if (len == 8)
+ {
+ regcache_cooked_write (regcache, 8, valbuf);
+ regcache_cooked_write (regcache, 9, (bfd_byte *) valbuf + 4);
+ }
else
internal_error (__FILE__, __LINE__,
- "Don't know how to return a %d-byte value.", length);
+ _("Don't know how to return a %d-byte value."), len);
}
-static void
-frv_pop_frame (void)
+enum return_value_convention
+frv_return_value (struct gdbarch *gdbarch, struct type *valtype,
+ struct regcache *regcache, gdb_byte *readbuf,
+ const gdb_byte *writebuf)
{
- generic_pop_current_frame (frv_pop_frame_regular);
-}
+ int struct_return = TYPE_CODE (valtype) == TYPE_CODE_STRUCT
+ || TYPE_CODE (valtype) == TYPE_CODE_UNION
+ || TYPE_CODE (valtype) == TYPE_CODE_ARRAY;
-static void
-frv_pop_frame_regular (struct frame_info *frame)
-{
- CORE_ADDR fp;
- int regno;
-
- fp = frame->frame;
-
- frv_frame_init_saved_regs (frame);
-
- write_register (pc_regnum, frv_frame_saved_pc (frame));
- for (regno = 0; regno < frv_num_regs; ++regno)
+ if (writebuf != NULL)
{
- if (frame->saved_regs[regno]
- && regno != pc_regnum
- && regno != sp_regnum)
- {
- write_register (regno,
- read_memory_integer (frame->saved_regs[regno], 4));
- }
+ gdb_assert (!struct_return);
+ frv_store_return_value (valtype, regcache, writebuf);
}
- write_register (sp_regnum, fp + frame->extra_info->fp_to_callers_sp_offset);
- flush_cached_frames ();
-}
+ if (readbuf != NULL)
+ {
+ gdb_assert (!struct_return);
+ frv_extract_return_value (valtype, regcache, readbuf);
+ }
-static void
-frv_remote_translate_xfer_address (CORE_ADDR memaddr, int nr_bytes,
- CORE_ADDR *targ_addr, int *targ_len)
-{
- *targ_addr = memaddr;
- *targ_len = nr_bytes;
+ if (struct_return)
+ return RETURN_VALUE_STRUCT_CONVENTION;
+ else
+ return RETURN_VALUE_REGISTER_CONVENTION;
}
and FR400. */
int
-frv_check_watch_resources (int type, int cnt, int ot)
+frv_check_watch_resources (struct gdbarch *gdbarch, int type, int cnt, int ot)
{
- struct gdbarch_tdep *var = CURRENT_VARIANT;
+ struct gdbarch_tdep *var = gdbarch_tdep (gdbarch);
/* Watchpoints not supported on simulator. */
if (strcmp (target_shortname, "sim") == 0)
}
-CORE_ADDR
-frv_stopped_data_address (void)
+int
+frv_stopped_data_address (CORE_ADDR *addr_p)
{
+ struct frame_info *frame = get_current_frame ();
CORE_ADDR brr, dbar0, dbar1, dbar2, dbar3;
- brr = read_register (brr_regnum);
- dbar0 = read_register (dbar0_regnum);
- dbar1 = read_register (dbar1_regnum);
- dbar2 = read_register (dbar2_regnum);
- dbar3 = read_register (dbar3_regnum);
+ brr = get_frame_register_unsigned (frame, brr_regnum);
+ dbar0 = get_frame_register_unsigned (frame, dbar0_regnum);
+ dbar1 = get_frame_register_unsigned (frame, dbar1_regnum);
+ dbar2 = get_frame_register_unsigned (frame, dbar2_regnum);
+ dbar3 = get_frame_register_unsigned (frame, dbar3_regnum);
if (brr & (1<<11))
- return dbar0;
+ *addr_p = dbar0;
else if (brr & (1<<10))
- return dbar1;
+ *addr_p = dbar1;
else if (brr & (1<<9))
- return dbar2;
+ *addr_p = dbar2;
else if (brr & (1<<8))
- return dbar3;
+ *addr_p = dbar3;
else
return 0;
+
+ return 1;
+}
+
+int
+frv_have_stopped_data_address (void)
+{
+ CORE_ADDR addr = 0;
+ return frv_stopped_data_address (&addr);
+}
+
+static CORE_ADDR
+frv_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ return frame_unwind_register_unsigned (next_frame, pc_regnum);
+}
+
+/* Given a GDB frame, determine the address of the calling function's
+ frame. This will be used to create a new GDB frame struct. */
+
+static void
+frv_frame_this_id (struct frame_info *next_frame,
+ void **this_prologue_cache, struct frame_id *this_id)
+{
+ struct frv_unwind_cache *info
+ = frv_frame_unwind_cache (next_frame, this_prologue_cache);
+ CORE_ADDR base;
+ CORE_ADDR func;
+ struct minimal_symbol *msym_stack;
+ struct frame_id id;
+
+ /* The FUNC is easy. */
+ func = frame_func_unwind (next_frame, NORMAL_FRAME);
+
+ /* Check if the stack is empty. */
+ msym_stack = lookup_minimal_symbol ("_stack", NULL, NULL);
+ if (msym_stack && info->base == SYMBOL_VALUE_ADDRESS (msym_stack))
+ return;
+
+ /* Hopefully the prologue analysis either correctly determined the
+ frame's base (which is the SP from the previous frame), or set
+ that base to "NULL". */
+ base = info->prev_sp;
+ if (base == 0)
+ return;
+
+ id = frame_id_build (base, func);
+ (*this_id) = id;
+}
+
+static void
+frv_frame_prev_register (struct frame_info *next_frame,
+ void **this_prologue_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, gdb_byte *bufferp)
+{
+ struct frv_unwind_cache *info
+ = frv_frame_unwind_cache (next_frame, this_prologue_cache);
+ trad_frame_get_prev_register (next_frame, info->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, bufferp);
+}
+
+static const struct frame_unwind frv_frame_unwind = {
+ NORMAL_FRAME,
+ frv_frame_this_id,
+ frv_frame_prev_register
+};
+
+static const struct frame_unwind *
+frv_frame_sniffer (struct frame_info *next_frame)
+{
+ return &frv_frame_unwind;
+}
+
+static CORE_ADDR
+frv_frame_base_address (struct frame_info *next_frame, void **this_cache)
+{
+ struct frv_unwind_cache *info
+ = frv_frame_unwind_cache (next_frame, this_cache);
+ return info->base;
+}
+
+static const struct frame_base frv_frame_base = {
+ &frv_frame_unwind,
+ frv_frame_base_address,
+ frv_frame_base_address,
+ frv_frame_base_address
+};
+
+static CORE_ADDR
+frv_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ return frame_unwind_register_unsigned (next_frame, sp_regnum);
+}
+
+
+/* Assuming NEXT_FRAME->prev is a dummy, return the frame ID of that
+ dummy frame. The frame ID's base needs to match the TOS value
+ saved by save_dummy_frame_tos(), and the PC match the dummy frame's
+ breakpoint. */
+
+static struct frame_id
+frv_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ return frame_id_build (frv_unwind_sp (gdbarch, next_frame),
+ frame_pc_unwind (next_frame));
}
static struct gdbarch *
{
struct gdbarch *gdbarch;
struct gdbarch_tdep *var;
+ int elf_flags = 0;
/* Check to see if we've already built an appropriate architecture
object for this executable. */
case bfd_mach_frvsimple:
case bfd_mach_fr500:
case bfd_mach_frvtomcat:
+ case bfd_mach_fr550:
set_variant_num_gprs (var, 64);
set_variant_num_fprs (var, 64);
break;
case bfd_mach_fr400:
+ case bfd_mach_fr450:
set_variant_num_gprs (var, 32);
set_variant_num_fprs (var, 32);
break;
/* Never heard of this variant. */
return 0;
}
-
- gdbarch = gdbarch_alloc (&info, var);
- /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
- ready to unwind the PC first (see frame.c:get_prev_frame()). */
- set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_default);
+ /* Extract the ELF flags, if available. */
+ if (info.abfd && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour)
+ elf_flags = elf_elfheader (info.abfd)->e_flags;
+
+ if (elf_flags & EF_FRV_FDPIC)
+ set_variant_abi_fdpic (var);
+
+ if (elf_flags & EF_FRV_CPU_FR450)
+ set_variant_scratch_registers (var);
+
+ gdbarch = gdbarch_alloc (&info, var);
set_gdbarch_short_bit (gdbarch, 16);
set_gdbarch_int_bit (gdbarch, 32);
set_gdbarch_ptr_bit (gdbarch, 32);
set_gdbarch_num_regs (gdbarch, frv_num_regs);
+ set_gdbarch_num_pseudo_regs (gdbarch, frv_num_pseudo_regs);
+
set_gdbarch_sp_regnum (gdbarch, sp_regnum);
set_gdbarch_deprecated_fp_regnum (gdbarch, fp_regnum);
set_gdbarch_pc_regnum (gdbarch, pc_regnum);
set_gdbarch_register_name (gdbarch, frv_register_name);
- set_gdbarch_deprecated_register_size (gdbarch, 4);
- set_gdbarch_deprecated_register_bytes (gdbarch, frv_num_regs * 4);
- set_gdbarch_register_byte (gdbarch, frv_register_byte);
- set_gdbarch_register_raw_size (gdbarch, frv_register_raw_size);
- set_gdbarch_deprecated_max_register_raw_size (gdbarch, 4);
- set_gdbarch_register_virtual_size (gdbarch, frv_register_virtual_size);
- set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 4);
- set_gdbarch_register_virtual_type (gdbarch, frv_register_virtual_type);
+ set_gdbarch_register_type (gdbarch, frv_register_type);
+ set_gdbarch_register_sim_regno (gdbarch, frv_register_sim_regno);
+
+ set_gdbarch_pseudo_register_read (gdbarch, frv_pseudo_register_read);
+ set_gdbarch_pseudo_register_write (gdbarch, frv_pseudo_register_write);
set_gdbarch_skip_prologue (gdbarch, frv_skip_prologue);
set_gdbarch_breakpoint_from_pc (gdbarch, frv_breakpoint_from_pc);
+ set_gdbarch_adjust_breakpoint_address
+ (gdbarch, frv_adjust_breakpoint_address);
- set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
- set_gdbarch_frame_args_skip (gdbarch, 0);
- set_gdbarch_frameless_function_invocation (gdbarch, frv_frameless_function_invocation);
-
- set_gdbarch_deprecated_saved_pc_after_call (gdbarch, frv_saved_pc_after_call);
-
- set_gdbarch_deprecated_frame_chain (gdbarch, frv_frame_chain);
- set_gdbarch_deprecated_frame_saved_pc (gdbarch, frv_frame_saved_pc);
-
- set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, frv_frame_init_saved_regs);
-
- set_gdbarch_use_struct_convention (gdbarch, frv_use_struct_convention);
- set_gdbarch_deprecated_extract_return_value (gdbarch, frv_extract_return_value);
+ set_gdbarch_return_value (gdbarch, frv_return_value);
- set_gdbarch_deprecated_store_struct_return (gdbarch, frv_store_struct_return);
- set_gdbarch_deprecated_store_return_value (gdbarch, frv_store_return_value);
- set_gdbarch_deprecated_extract_struct_value_address (gdbarch, frv_extract_struct_value_address);
+ /* Frame stuff. */
+ set_gdbarch_unwind_pc (gdbarch, frv_unwind_pc);
+ set_gdbarch_unwind_sp (gdbarch, frv_unwind_sp);
+ set_gdbarch_frame_align (gdbarch, frv_frame_align);
+ frame_base_set_default (gdbarch, &frv_frame_base);
+ /* We set the sniffer lower down after the OSABI hooks have been
+ established. */
/* Settings for calling functions in the inferior. */
- set_gdbarch_deprecated_push_arguments (gdbarch, frv_push_arguments);
- set_gdbarch_deprecated_push_return_address (gdbarch, frv_push_return_address);
- set_gdbarch_deprecated_pop_frame (gdbarch, frv_pop_frame);
-
- set_gdbarch_deprecated_call_dummy_words (gdbarch, frv_call_dummy_words);
- set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, sizeof (frv_call_dummy_words));
- set_gdbarch_deprecated_init_extra_frame_info (gdbarch, frv_init_extra_frame_info);
+ set_gdbarch_push_dummy_call (gdbarch, frv_push_dummy_call);
+ set_gdbarch_unwind_dummy_id (gdbarch, frv_unwind_dummy_id);
/* Settings that should be unnecessary. */
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
- set_gdbarch_write_pc (gdbarch, generic_target_write_pc);
- set_gdbarch_deprecated_dummy_write_sp (gdbarch, deprecated_write_sp);
-
- set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_at_entry_point);
-
- set_gdbarch_decr_pc_after_break (gdbarch, 0);
- set_gdbarch_function_start_offset (gdbarch, 0);
-
- set_gdbarch_remote_translate_xfer_address
- (gdbarch, frv_remote_translate_xfer_address);
-
/* Hardware watchpoint / breakpoint support. */
switch (info.bfd_arch_info->mach)
{
break;
case bfd_mach_fr400:
+ case bfd_mach_fr450:
/* fr400-style hardware debugging support. */
var->num_hw_watchpoints = 2;
var->num_hw_breakpoints = 4;
break;
}
+ set_gdbarch_print_insn (gdbarch, print_insn_frv);
+ if (frv_abi (gdbarch) == FRV_ABI_FDPIC)
+ set_gdbarch_convert_from_func_ptr_addr (gdbarch,
+ frv_convert_from_func_ptr_addr);
+
+ set_solib_ops (gdbarch, &frv_so_ops);
+
+ /* Hook in ABI-specific overrides, if they have been registered. */
+ gdbarch_init_osabi (info, gdbarch);
+
+ /* Set the fallback (prologue based) frame sniffer. */
+ frame_unwind_append_sniffer (gdbarch, frv_frame_sniffer);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ frv_fetch_objfile_link_map);
+
return gdbarch;
}
_initialize_frv_tdep (void)
{
register_gdbarch_init (bfd_arch_frv, frv_gdbarch_init);
-
- deprecated_tm_print_insn = print_insn_frv;
}
-
-\f
projects / deliverable / binutils-gdb.git / blobdiff