/* Target-dependent code for the NEC V850 for GDB, the GNU debugger.
- Copyright 1996, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+
+ Copyright (C) 1996-2013 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 "frame.h"
+#include "frame-base.h"
+#include "trad-frame.h"
+#include "frame-unwind.h"
+#include "dwarf2-frame.h"
+#include "gdbtypes.h"
#include "inferior.h"
-#include "target.h"
-#include "value.h"
-#include "bfd.h"
#include "gdb_string.h"
+#include "gdb_assert.h"
#include "gdbcore.h"
-#include "symfile.h"
#include "arch-utils.h"
#include "regcache.h"
-#include "symtab.h"
-
-struct gdbarch_tdep
-{
- /* gdbarch target dependent data here. Currently unused for v850. */
-};
-
-/* Extra info which is saved in each frame_info. */
-struct frame_extra_info
-{
-};
-
-enum {
- E_R0_REGNUM,
- E_R1_REGNUM,
- E_R2_REGNUM, E_SAVE1_START_REGNUM = E_R2_REGNUM, E_SAVE1_END_REGNUM = E_R2_REGNUM,
- E_R3_REGNUM, E_SP_REGNUM = E_R3_REGNUM,
- E_R4_REGNUM,
- E_R5_REGNUM,
- E_R6_REGNUM, E_ARG0_REGNUM = E_R6_REGNUM,
- E_R7_REGNUM,
- E_R8_REGNUM,
- E_R9_REGNUM, E_ARGLAST_REGNUM = E_R9_REGNUM,
- E_R10_REGNUM, E_V0_REGNUM = E_R10_REGNUM,
- E_R11_REGNUM, E_V1_REGNUM = E_R11_REGNUM,
- E_R12_REGNUM,
- E_R13_REGNUM,
- E_R14_REGNUM,
- E_R15_REGNUM,
- E_R16_REGNUM,
- E_R17_REGNUM,
- E_R18_REGNUM,
- E_R19_REGNUM,
- E_R20_REGNUM, E_SAVE2_START_REGNUM = E_R20_REGNUM,
- E_R21_REGNUM,
- E_R22_REGNUM,
- E_R23_REGNUM,
- E_R24_REGNUM,
- E_R25_REGNUM,
- E_R26_REGNUM,
- E_R27_REGNUM,
- E_R28_REGNUM,
- E_R29_REGNUM, E_SAVE2_END_REGNUM = E_R29_REGNUM, E_FP_RAW_REGNUM = E_R29_REGNUM,
- E_R30_REGNUM, E_EP_REGNUM = E_R30_REGNUM,
- E_R31_REGNUM, E_SAVE3_START_REGNUM = E_R31_REGNUM, E_SAVE3_END_REGNUM = E_R31_REGNUM, E_RP_REGNUM = E_R31_REGNUM,
- E_R32_REGNUM, E_SR0_REGNUM = E_R32_REGNUM,
- E_R33_REGNUM,
- E_R34_REGNUM,
- E_R35_REGNUM,
- E_R36_REGNUM,
- E_R37_REGNUM, E_PS_REGNUM = E_R37_REGNUM,
- E_R38_REGNUM,
- E_R39_REGNUM,
- E_R40_REGNUM,
- E_R41_REGNUM,
- E_R42_REGNUM,
- E_R43_REGNUM,
- E_R44_REGNUM,
- E_R45_REGNUM,
- E_R46_REGNUM,
- E_R47_REGNUM,
- E_R48_REGNUM,
- E_R49_REGNUM,
- E_R50_REGNUM,
- E_R51_REGNUM,
- E_R52_REGNUM, E_CTBP_REGNUM = E_R52_REGNUM,
- E_R53_REGNUM,
- E_R54_REGNUM,
- E_R55_REGNUM,
- E_R56_REGNUM,
- E_R57_REGNUM,
- E_R58_REGNUM,
- E_R59_REGNUM,
- E_R60_REGNUM,
- E_R61_REGNUM,
- E_R62_REGNUM,
- E_R63_REGNUM,
- E_R64_REGNUM, E_PC_REGNUM = E_R64_REGNUM,
- E_R65_REGNUM, E_FP_REGNUM = E_R65_REGNUM,
- E_NUM_REGS
-};
+#include "dis-asm.h"
+#include "osabi.h"
enum
-{
- v850_reg_size = 4
-};
+ {
+ E_R0_REGNUM,
+ E_R1_REGNUM,
+ E_R2_REGNUM,
+ E_R3_REGNUM, E_SP_REGNUM = E_R3_REGNUM,
+ E_R4_REGNUM,
+ E_R5_REGNUM,
+ E_R6_REGNUM, E_ARG0_REGNUM = E_R6_REGNUM,
+ E_R7_REGNUM,
+ E_R8_REGNUM,
+ E_R9_REGNUM, E_ARGLAST_REGNUM = E_R9_REGNUM,
+ E_R10_REGNUM, E_V0_REGNUM = E_R10_REGNUM,
+ E_R11_REGNUM, E_V1_REGNUM = E_R11_REGNUM,
+ E_R12_REGNUM,
+ E_R13_REGNUM,
+ E_R14_REGNUM,
+ E_R15_REGNUM,
+ E_R16_REGNUM,
+ E_R17_REGNUM,
+ E_R18_REGNUM,
+ E_R19_REGNUM,
+ E_R20_REGNUM,
+ E_R21_REGNUM,
+ E_R22_REGNUM,
+ E_R23_REGNUM,
+ E_R24_REGNUM,
+ E_R25_REGNUM,
+ E_R26_REGNUM,
+ E_R27_REGNUM,
+ E_R28_REGNUM,
+ E_R29_REGNUM, E_FP_REGNUM = E_R29_REGNUM,
+ E_R30_REGNUM, E_EP_REGNUM = E_R30_REGNUM,
+ E_R31_REGNUM, E_LP_REGNUM = E_R31_REGNUM,
+ E_R32_REGNUM, E_SR0_REGNUM = E_R32_REGNUM,
+ E_R33_REGNUM,
+ E_R34_REGNUM,
+ E_R35_REGNUM,
+ E_R36_REGNUM,
+ E_R37_REGNUM, E_PS_REGNUM = E_R37_REGNUM,
+ E_R38_REGNUM,
+ E_R39_REGNUM,
+ E_R40_REGNUM,
+ E_R41_REGNUM,
+ E_R42_REGNUM,
+ E_R43_REGNUM,
+ E_R44_REGNUM,
+ E_R45_REGNUM,
+ E_R46_REGNUM,
+ E_R47_REGNUM,
+ E_R48_REGNUM,
+ E_R49_REGNUM,
+ E_R50_REGNUM,
+ E_R51_REGNUM,
+ E_R52_REGNUM, E_CTBP_REGNUM = E_R52_REGNUM,
+ E_R53_REGNUM,
+ E_R54_REGNUM,
+ E_R55_REGNUM,
+ E_R56_REGNUM,
+ E_R57_REGNUM,
+ E_R58_REGNUM,
+ E_R59_REGNUM,
+ E_R60_REGNUM,
+ E_R61_REGNUM,
+ E_R62_REGNUM,
+ E_R63_REGNUM,
+ E_R64_REGNUM, E_PC_REGNUM = E_R64_REGNUM,
+ E_R65_REGNUM,
+ E_NUM_OF_V850_REGS,
+ E_NUM_OF_V850E_REGS = E_NUM_OF_V850_REGS,
+
+ /* mpu0 system registers */
+ E_R66_REGNUM = E_NUM_OF_V850_REGS,
+ E_R67_REGNUM,
+ E_R68_REGNUM,
+ E_R69_REGNUM,
+ E_R70_REGNUM,
+ E_R71_REGNUM,
+ E_R72_REGNUM,
+ E_R73_REGNUM,
+ E_R74_REGNUM,
+ E_R75_REGNUM,
+ E_R76_REGNUM,
+ E_R77_REGNUM,
+ E_R78_REGNUM,
+ E_R79_REGNUM,
+ E_R80_REGNUM,
+ E_R81_REGNUM,
+ E_R82_REGNUM,
+ E_R83_REGNUM,
+ E_R84_REGNUM,
+ E_R85_REGNUM,
+ E_R86_REGNUM,
+ E_R87_REGNUM,
+ E_R88_REGNUM,
+ E_R89_REGNUM,
+ E_R90_REGNUM,
+ E_R91_REGNUM,
+ E_R92_REGNUM,
+ E_R93_REGNUM,
+
+ /* mpu1 system registers */
+
+ E_R94_REGNUM,
+ E_R95_REGNUM,
+ E_R96_REGNUM,
+ E_R97_REGNUM,
+ E_R98_REGNUM,
+ E_R99_REGNUM,
+ E_R100_REGNUM,
+ E_R101_REGNUM,
+ E_R102_REGNUM,
+ E_R103_REGNUM,
+ E_R104_REGNUM,
+ E_R105_REGNUM,
+ E_R106_REGNUM,
+ E_R107_REGNUM,
+ E_R108_REGNUM,
+ E_R109_REGNUM,
+ E_R110_REGNUM,
+ E_R111_REGNUM,
+ E_R112_REGNUM,
+ E_R113_REGNUM,
+ E_R114_REGNUM,
+ E_R115_REGNUM,
+ E_R116_REGNUM,
+ E_R117_REGNUM,
+ E_R118_REGNUM,
+ E_R119_REGNUM,
+ E_R120_REGNUM,
+ E_R121_REGNUM,
+
+ /* fpu system registers */
+ E_R122_REGNUM,
+ E_R123_REGNUM,
+ E_R124_REGNUM,
+ E_R125_REGNUM,
+ E_R126_REGNUM,
+ E_R127_REGNUM,
+ E_R128_REGNUM, E_FPSR_REGNUM = E_R128_REGNUM,
+ E_R129_REGNUM, E_FPEPC_REGNUM = E_R129_REGNUM,
+ E_R130_REGNUM, E_FPST_REGNUM = E_R130_REGNUM,
+ E_R131_REGNUM, E_FPCC_REGNUM = E_R131_REGNUM,
+ E_R132_REGNUM, E_FPCFG_REGNUM = E_R132_REGNUM,
+ E_R133_REGNUM,
+ E_R134_REGNUM,
+ E_R135_REGNUM,
+ E_R136_REGNUM,
+ E_R137_REGNUM,
+ E_R138_REGNUM,
+ E_R139_REGNUM,
+ E_R140_REGNUM,
+ E_R141_REGNUM,
+ E_R142_REGNUM,
+ E_R143_REGNUM,
+ E_R144_REGNUM,
+ E_R145_REGNUM,
+ E_R146_REGNUM,
+ E_R147_REGNUM,
+ E_R148_REGNUM,
+ E_NUM_REGS
+ };
-/* Size of all registers as a whole. */
enum
{
- E_ALL_REGS_SIZE = (E_NUM_REGS) * v850_reg_size
+ v850_reg_size = 4
};
-/* Size of return datatype which fits into all return registers. */
+/* Size of return datatype which fits into all return registers. */
enum
{
E_MAX_RETTYPE_SIZE_IN_REGS = 2 * v850_reg_size
};
-static LONGEST call_dummy_nil[] = {0};
-
-static char *v850_generic_reg_names[] =
-{ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
- "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
- "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
- "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
- "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7",
- "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
- "sr16", "sr17", "sr18", "sr19", "sr20", "sr21", "sr22", "sr23",
- "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31",
- "pc", "fp"
-};
-
-static char *v850e_reg_names[] =
-{
- "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
- "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
- "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
- "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
- "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7",
- "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
- "ctpc", "ctpsw", "dbpc", "dbpsw", "ctbp", "sr21", "sr22", "sr23",
- "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31",
- "pc", "fp"
+struct v850_frame_cache
+{
+ /* Base address. */
+ CORE_ADDR base;
+ LONGEST sp_offset;
+ CORE_ADDR pc;
+
+ /* Flag showing that a frame has been created in the prologue code. */
+ int uses_fp;
+
+ /* Saved registers. */
+ struct trad_frame_saved_reg *saved_regs;
};
-char **v850_register_names = v850_generic_reg_names;
-
-struct
- {
- char **regnames;
- int mach;
- }
-v850_processor_type_table[] =
+/* Info gleaned from scanning a function's prologue. */
+struct pifsr /* Info about one saved register. */
{
- {
- v850_generic_reg_names, bfd_mach_v850
- }
- ,
- {
- v850e_reg_names, bfd_mach_v850e
- }
- ,
- {
- NULL, 0
- }
+ int offset; /* Offset from sp or fp. */
+ int cur_frameoffset; /* Current frameoffset. */
+ int reg; /* Saved register number. */
};
-/* Info gleaned from scanning a function's prologue. */
-
-struct pifsr /* Info about one saved reg */
- {
- int framereg; /* Frame reg (SP or FP) */
- int offset; /* Offset from framereg */
- int cur_frameoffset; /* Current frameoffset */
- int reg; /* Saved register number */
- };
-
-struct prologue_info
- {
- int framereg;
- int frameoffset;
- int start_function;
- struct pifsr *pifsrs;
- };
-
-static CORE_ADDR v850_scan_prologue (CORE_ADDR pc, struct prologue_info *fs);
-
-/* Function: v850_register_name
- Returns the name of the v850/v850e register N. */
-
static const char *
-v850_register_name (int regnum)
+v850_register_name (struct gdbarch *gdbarch, int regnum)
{
- if (regnum < 0 || regnum >= E_NUM_REGS)
- internal_error (__FILE__, __LINE__,
- "v850_register_name: illegal register number %d",
- regnum);
- else
- return v850_register_names[regnum];
-
+ static const char *v850_reg_names[] =
+ { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
+ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
+ "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
+ "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7",
+ "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
+ "sr16", "sr17", "sr18", "sr19", "sr20", "sr21", "sr22", "sr23",
+ "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31",
+ "pc", "fp"
+ };
+ if (regnum < 0 || regnum > E_NUM_OF_V850_REGS)
+ return NULL;
+ return v850_reg_names[regnum];
}
-/* Function: v850_register_byte
- Returns the byte position in the register cache for register N. */
-
-static int
-v850_register_byte (int regnum)
+static const char *
+v850e_register_name (struct gdbarch *gdbarch, int regnum)
{
- if (regnum < 0 || regnum >= E_NUM_REGS)
- internal_error (__FILE__, __LINE__,
- "v850_register_byte: illegal register number %d",
- regnum);
- else
- return regnum * v850_reg_size;
+ static const char *v850e_reg_names[] =
+ {
+ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
+ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
+ "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
+ "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7",
+ "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
+ "ctpc", "ctpsw", "dbpc", "dbpsw", "ctbp", "sr21", "sr22", "sr23",
+ "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31",
+ "pc", "fp"
+ };
+ if (regnum < 0 || regnum > E_NUM_OF_V850E_REGS)
+ return NULL;
+ return v850e_reg_names[regnum];
}
-/* Function: v850_register_raw_size
- Returns the number of bytes occupied by the register on the target. */
-
-static int
-v850_register_raw_size (int regnum)
+static const char *
+v850e2_register_name (struct gdbarch *gdbarch, int regnum)
{
+ static const char *v850e2_reg_names[] =
+ {
+ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
+ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
+ "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
+
+ "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7",
+ "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
+ "ctpc", "ctpsw", "dbpc", "dbpsw", "ctbp", "sr21", "sr22", "sr23",
+ "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31",
+ "pc", "fp"
+
+ /* mpu0 system registers */
+ "vip", "sr33", "sr34", "sr35", "vmecr", "vmtid", "vmadr", "sr39",
+ "vpecr", "vptid", "vpadr", "sr43", "vdecr", "vdtid", "sr46", "sr47",
+ "sr48", "sr49", "sr50", "sr51", "sr52", "sr53", "sr54", "sr55",
+ "sr56", "sr57", "sr58", "sr59",
+
+ /* mpu1 system registers */
+ "mpm", "mpc", "tid", "ppa", "ppm", "ppc", "dcc", "dcv0",
+ "dcv1", "sr69", "spal", "spau", "ipa0l", "ipa0u", "ipa1l", "ipa1u",
+ "iap2l", "ipa2u", "ipa3l", "ipa3u", "dpa0l", "dpa0u", "dpa1l", "dpa1u",
+ "dpa2l", "dpa2u", "dpa3l", "dpa3u",
+
+ /* fpu system registers */
+ "sr88", "sr89", "sr90", "sr91", "sr92", "sr93", "fpsr", "fpepc",
+ "fpst", "fpcc", "fpcfg", "sr99", "sr100", "sr101", "sr102", "sr103",
+ "sr104", "sr105", "sr106", "sr107", "sr108", "sr109", "sr110", "sr111",
+ "sr112", "sr113", "sr114", "sr115"
+ };
if (regnum < 0 || regnum >= E_NUM_REGS)
- internal_error (__FILE__, __LINE__,
- "v850_register_raw_size: illegal register number %d",
- regnum);
- /* Only the PC has 4 Byte, all other registers 2 Byte. */
- else
- return v850_reg_size;
+ return NULL;
+ return v850e2_reg_names[regnum];
}
-/* Function: v850_register_virtual_size
- Returns the number of bytes occupied by the register as represented
- internally by gdb. */
-
-static int
-v850_register_virtual_size (int regnum)
-{
- return v850_register_raw_size (regnum);
-}
-
-/* Function: v850_reg_virtual_type
- Returns the default type for register N. */
+/* Returns the default type for register N. */
static struct type *
-v850_reg_virtual_type (int regnum)
+v850_register_type (struct gdbarch *gdbarch, int regnum)
{
- if (regnum < 0 || regnum >= E_NUM_REGS)
- internal_error (__FILE__, __LINE__,
- "v850_register_virtual_type: illegal register number %d",
- regnum);
- else if (regnum == E_PC_REGNUM)
- return builtin_type_uint32;
- else
- return builtin_type_int32;
+ if (regnum == E_PC_REGNUM)
+ return builtin_type (gdbarch)->builtin_func_ptr;
+ return builtin_type (gdbarch)->builtin_int32;
}
static int
/* Should call_function allocate stack space for a struct return? */
static int
-v850_use_struct_convention (int gcc_p, struct type *type)
+v850_use_struct_convention (struct type *type)
{
- /* According to ABI:
- * return TYPE_LENGTH (type) > 8);
- */
-
- /* Current implementation in gcc: */
-
int i;
struct type *fld_type, *tgt_type;
- /* 1. The value is greater than 8 bytes -> returned by copying */
+ /* 1. The value is greater than 8 bytes -> returned by copying. */
if (TYPE_LENGTH (type) > 8)
return 1;
- /* 2. The value is a single basic type -> returned in register */
+ /* 2. The value is a single basic type -> returned in register. */
if (v850_type_is_scalar (type))
return 0;
- /* The value is a structure or union with a single element
- * and that element is either a single basic type or an array of
- * a single basic type whoes size is greater than or equal to 4
- * -> returned in register */
+ /* The value is a structure or union with a single element and that
+ element is either a single basic type or an array of a single basic
+ type whose size is greater than or equal to 4 -> returned in register. */
if ((TYPE_CODE (type) == TYPE_CODE_STRUCT
|| TYPE_CODE (type) == TYPE_CODE_UNION)
&& TYPE_NFIELDS (type) == 1)
}
}
- /* The value is a structure whose first element is an integer or
- * a float, and which contains no arrays of more than two elements
- * -> returned in register */
+ /* The value is a structure whose first element is an integer or a float,
+ and which contains no arrays of more than two elements -> returned in
+ register. */
if (TYPE_CODE (type) == TYPE_CODE_STRUCT
&& v850_type_is_scalar (TYPE_FIELD_TYPE (type, 0))
&& TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0)) == 4)
}
/* The value is a union which contains at least one field which
- * would be returned in registers according to these rules
- * -> returned in register */
+ would be returned in registers according to these rules ->
+ returned in register. */
if (TYPE_CODE (type) == TYPE_CODE_UNION)
{
for (i = 0; i < TYPE_NFIELDS (type); ++i)
{
fld_type = TYPE_FIELD_TYPE (type, 0);
- if (!v850_use_struct_convention (0, fld_type))
+ if (!v850_use_struct_convention (fld_type))
return 0;
}
}
return 1;
}
-\f
-
-/* Structure for mapping bits in register lists to register numbers. */
+/* Structure for mapping bits in register lists to register numbers. */
struct reg_list
{
long mask;
int regno;
};
-/* Helper function for v850_scan_prologue to handle prepare instruction. */
+/* Helper function for v850_scan_prologue to handle prepare instruction. */
static void
-handle_prepare (int insn, int insn2, CORE_ADDR * current_pc_ptr,
- struct prologue_info *pi, struct pifsr **pifsr_ptr)
+v850_handle_prepare (int insn, int insn2, CORE_ADDR * current_pc_ptr,
+ struct v850_frame_cache *pi, struct pifsr **pifsr_ptr)
{
CORE_ADDR current_pc = *current_pc_ptr;
struct pifsr *pifsr = *pifsr_ptr;
};
int i;
- if ((next & 0x1f) == 0x0b) /* skip imm16 argument */
+ if ((next & 0x1f) == 0x0b) /* skip imm16 argument */
current_pc += 2;
else if ((next & 0x1f) == 0x13) /* skip imm16 argument */
current_pc += 2;
else if ((next & 0x1f) == 0x1b) /* skip imm32 argument */
current_pc += 4;
- /* Calculate the total size of the saved registers, and add it
- it to the immediate value used to adjust SP. */
+ /* Calculate the total size of the saved registers, and add it to the
+ immediate value used to adjust SP. */
for (i = 0; reg_table[i].mask != 0; i++)
if (list12 & reg_table[i].mask)
- offset += v850_register_raw_size (reg_table[i].regno);
- pi->frameoffset -= offset;
+ offset += v850_reg_size;
+ pi->sp_offset -= offset;
- /* Calculate the offsets of the registers relative to the value
- the SP will have after the registers have been pushed and the
- imm5 value has been subtracted from it. */
+ /* Calculate the offsets of the registers relative to the value the SP
+ will have after the registers have been pushed and the imm5 value has
+ been subtracted from it. */
if (pifsr)
{
for (i = 0; reg_table[i].mask != 0; i++)
if (list12 & reg_table[i].mask)
{
int reg = reg_table[i].regno;
- offset -= v850_register_raw_size (reg);
+ offset -= v850_reg_size;
pifsr->reg = reg;
pifsr->offset = offset;
- pifsr->cur_frameoffset = pi->frameoffset;
-#ifdef DEBUG
- printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
-#endif
+ pifsr->cur_frameoffset = pi->sp_offset;
pifsr++;
}
}
}
-#ifdef DEBUG
- printf_filtered ("\tfound ctret after regsave func");
-#endif
- /* Set result parameters. */
+ /* Set result parameters. */
*current_pc_ptr = current_pc;
*pifsr_ptr = pifsr;
}
/* Helper function for v850_scan_prologue to handle pushm/pushl instructions.
- FIXME: the SR bit of the register list is not supported; must check
- that the compiler does not ever generate this bit. */
+ The SR bit of the register list is not supported. gcc does not generate
+ this bit. */
static void
-handle_pushm (int insn, int insn2, struct prologue_info *pi,
- struct pifsr **pifsr_ptr)
+v850_handle_pushm (int insn, int insn2, struct v850_frame_cache *pi,
+ struct pifsr **pifsr_ptr)
{
struct pifsr *pifsr = *pifsr_ptr;
long list12 = ((insn & 0x0f) << 16) + (insn2 & 0xfff0);
struct reg_list *reg_table;
int i;
- /* Is this a pushml or a pushmh? */
+ /* Is this a pushml or a pushmh? */
if ((insn2 & 7) == 1)
reg_table = pushml_reg_table;
else
reg_table = pushmh_reg_table;
- /* Calculate the total size of the saved registers, and add it
- it to the immediate value used to adjust SP. */
+ /* Calculate the total size of the saved registers, and add it to the
+ immediate value used to adjust SP. */
for (i = 0; reg_table[i].mask != 0; i++)
if (list12 & reg_table[i].mask)
- offset += v850_register_raw_size (reg_table[i].regno);
- pi->frameoffset -= offset;
+ offset += v850_reg_size;
+ pi->sp_offset -= offset;
- /* Calculate the offsets of the registers relative to the value
- the SP will have after the registers have been pushed and the
- imm5 value is subtracted from it. */
+ /* Calculate the offsets of the registers relative to the value the SP
+ will have after the registers have been pushed and the imm5 value is
+ subtracted from it. */
if (pifsr)
{
for (i = 0; reg_table[i].mask != 0; i++)
if (list12 & reg_table[i].mask)
{
int reg = reg_table[i].regno;
- offset -= v850_register_raw_size (reg);
+ offset -= v850_reg_size;
pifsr->reg = reg;
pifsr->offset = offset;
- pifsr->cur_frameoffset = pi->frameoffset;
-#ifdef DEBUG
- printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
-#endif
+ pifsr->cur_frameoffset = pi->sp_offset;
pifsr++;
}
}
}
-#ifdef DEBUG
- printf_filtered ("\tfound ctret after regsave func");
-#endif
- /* Set result parameters. */
+ /* Set result parameters. */
*pifsr_ptr = pifsr;
}
-\f
+/* Helper function to evaluate if register is one of the "save" registers.
+ This allows to simplify conditionals in v850_analyze_prologue a lot. */
+static int
+v850_is_save_register (int reg)
+{
+ /* The caller-save registers are R2, R20 - R29 and R31. All other
+ registers are either special purpose (PC, SP), argument registers,
+ or just considered free for use in the caller. */
+ return reg == E_R2_REGNUM
+ || (reg >= E_R20_REGNUM && reg <= E_R29_REGNUM)
+ || reg == E_R31_REGNUM;
+}
-/* Function: scan_prologue
- Scan the prologue of the function that contains PC, and record what
+/* Scan the prologue of the function that contains PC, and record what
we find in PI. Returns the pc after the prologue. Note that the
addresses saved in frame->saved_regs are just frame relative (negative
offsets from the frame pointer). This is because we don't know the
prologue. */
static CORE_ADDR
-v850_scan_prologue (CORE_ADDR pc, struct prologue_info *pi)
+v850_analyze_prologue (struct gdbarch *gdbarch,
+ CORE_ADDR func_addr, CORE_ADDR pc,
+ struct v850_frame_cache *pi, ULONGEST ctbp)
{
- CORE_ADDR func_addr, prologue_end, current_pc;
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ CORE_ADDR prologue_end, current_pc;
+ struct pifsr pifsrs[E_NUM_REGS + 1];
struct pifsr *pifsr, *pifsr_tmp;
- int fp_used;
int ep_used;
int reg;
CORE_ADDR save_pc, save_end;
int regsave_func_p;
int r12_tmp;
- /* First, figure out the bounds of the prologue so that we can limit the
- search to something reasonable. */
-
- if (find_pc_partial_function (pc, NULL, &func_addr, NULL))
- {
- struct symtab_and_line sal;
+ memset (&pifsrs, 0, sizeof pifsrs);
+ pifsr = &pifsrs[0];
- sal = find_pc_line (func_addr, 0);
-
- if (func_addr == entry_point_address ())
- pi->start_function = 1;
- else
- pi->start_function = 0;
-
-#if 0
- if (sal.line == 0)
- prologue_end = pc;
- else
- prologue_end = sal.end;
-#else
- prologue_end = pc;
-#endif
- }
- else
- { /* We're in the boondocks */
- func_addr = pc - 100;
- prologue_end = pc;
- }
-
- prologue_end = min (prologue_end, pc);
+ prologue_end = pc;
/* Now, search the prologue looking for instructions that setup fp, save
rp, adjust sp and such. We also record the frame offset of any saved
- registers. */
+ registers. */
- pi->frameoffset = 0;
- pi->framereg = E_SP_REGNUM;
- fp_used = 0;
+ pi->sp_offset = 0;
+ pi->uses_fp = 0;
ep_used = 0;
- pifsr = pi->pifsrs;
regsave_func_p = 0;
save_pc = 0;
save_end = 0;
r12_tmp = 0;
-#ifdef DEBUG
- printf_filtered ("Current_pc = 0x%.8lx, prologue_end = 0x%.8lx\n",
- (long) func_addr, (long) prologue_end);
-#endif
-
for (current_pc = func_addr; current_pc < prologue_end;)
{
int insn;
int insn2 = -1; /* dummy value */
-#ifdef DEBUG
- printf_filtered ("0x%.8lx ", (long) current_pc);
- TARGET_PRINT_INSN (current_pc, &tm_print_insn_info);
-#endif
-
- insn = read_memory_unsigned_integer (current_pc, 2);
+ insn = read_memory_integer (current_pc, 2, byte_order);
current_pc += 2;
- if ((insn & 0x0780) >= 0x0600) /* Four byte instruction? */
+ if ((insn & 0x0780) >= 0x0600) /* Four byte instruction? */
{
- insn2 = read_memory_unsigned_integer (current_pc, 2);
+ insn2 = read_memory_integer (current_pc, 2, byte_order);
current_pc += 2;
}
current_pc += disp - 4;
prologue_end = (current_pc
+ (2 * 3) /* moves to/from ep */
- + 4 /* addi <const>,sp,sp */
- + 2 /* jmp [r10] */
+ + 4 /* addi <const>,sp,sp */
+ + 2 /* jmp [r10] */
+ (2 * 12) /* sst.w to save r2, r20-r29, r31 */
+ 20); /* slop area */
-
-#ifdef DEBUG
- printf_filtered ("\tfound jarl <func>,r10, disp = %ld, low_disp = %ld, new pc = 0x%.8lx\n",
- disp, low_disp, (long) current_pc + 2);
-#endif
- continue;
}
else if ((insn & 0xffc0) == 0x0200 && !regsave_func_p)
{ /* callt <imm6> */
- long ctbp = read_register (E_CTBP_REGNUM);
long adr = ctbp + ((insn & 0x3f) << 1);
save_pc = current_pc;
save_end = prologue_end;
regsave_func_p = 1;
- current_pc = ctbp + (read_memory_unsigned_integer (adr, 2) & 0xffff);
+ current_pc = ctbp + (read_memory_unsigned_integer (adr, 2, byte_order)
+ & 0xffff);
prologue_end = (current_pc
+ (2 * 3) /* prepare list2,imm5,sp/imm */
- + 4 /* ctret */
+ + 4 /* ctret */
+ 20); /* slop area */
-
-#ifdef DEBUG
- printf_filtered ("\tfound callt, ctbp = 0x%.8lx, adr = %.8lx, new pc = 0x%.8lx\n",
- ctbp, adr, (long) current_pc);
-#endif
continue;
}
else if ((insn & 0xffc0) == 0x0780) /* prepare list2,imm5 */
{
- handle_prepare (insn, insn2, ¤t_pc, pi, &pifsr);
+ v850_handle_prepare (insn, insn2, ¤t_pc, pi, &pifsr);
continue;
}
else if (insn == 0x07e0 && regsave_func_p && insn2 == 0x0144)
- { /* ctret after processing register save function */
+ { /* ctret after processing register save. */
current_pc = save_pc;
prologue_end = save_end;
regsave_func_p = 0;
-#ifdef DEBUG
- printf_filtered ("\tfound ctret after regsave func");
-#endif
continue;
}
else if ((insn & 0xfff0) == 0x07e0 && (insn2 & 5) == 1)
{ /* pushml, pushmh */
- handle_pushm (insn, insn2, pi, &pifsr);
+ v850_handle_pushm (insn, insn2, pi, &pifsr);
continue;
}
else if ((insn & 0xffe0) == 0x0060 && regsave_func_p)
- { /* jmp after processing register save function */
+ { /* jmp after processing register save. */
current_pc = save_pc;
prologue_end = save_end;
regsave_func_p = 0;
-#ifdef DEBUG
- printf_filtered ("\tfound jmp after regsave func");
-#endif
continue;
}
else if ((insn & 0x07c0) == 0x0780 /* jarl or jr */
|| (insn & 0xffe0) == 0x0060 /* jmp */
|| (insn & 0x0780) == 0x0580) /* branch */
{
-#ifdef DEBUG
- printf_filtered ("\n");
-#endif
- break; /* Ran into end of prologue */
+ break; /* Ran into end of prologue. */
}
- else if ((insn & 0xffe0) == ((E_SP_REGNUM << 11) | 0x0240)) /* add <imm>,sp */
- pi->frameoffset += ((insn & 0x1f) ^ 0x10) - 0x10;
- else if (insn == ((E_SP_REGNUM << 11) | 0x0600 | E_SP_REGNUM)) /* addi <imm>,sp,sp */
- pi->frameoffset += insn2;
- else if (insn == ((E_FP_RAW_REGNUM << 11) | 0x0000 | E_SP_REGNUM)) /* mov sp,fp */
- {
- fp_used = 1;
- pi->framereg = E_FP_RAW_REGNUM;
- }
-
- else if (insn == ((E_R12_REGNUM << 11) | 0x0640 | E_R0_REGNUM)) /* movhi hi(const),r0,r12 */
+ else if ((insn & 0xffe0) == ((E_SP_REGNUM << 11) | 0x0240))
+ /* add <imm>,sp */
+ pi->sp_offset += ((insn & 0x1f) ^ 0x10) - 0x10;
+ else if (insn == ((E_SP_REGNUM << 11) | 0x0600 | E_SP_REGNUM))
+ /* addi <imm>,sp,sp */
+ pi->sp_offset += insn2;
+ else if (insn == ((E_FP_REGNUM << 11) | 0x0000 | E_SP_REGNUM))
+ /* mov sp,fp */
+ pi->uses_fp = 1;
+ else if (insn == ((E_R12_REGNUM << 11) | 0x0640 | E_R0_REGNUM))
+ /* movhi hi(const),r0,r12 */
r12_tmp = insn2 << 16;
- else if (insn == ((E_R12_REGNUM << 11) | 0x0620 | E_R12_REGNUM)) /* movea lo(const),r12,r12 */
+ else if (insn == ((E_R12_REGNUM << 11) | 0x0620 | E_R12_REGNUM))
+ /* movea lo(const),r12,r12 */
r12_tmp += insn2;
- else if (insn == ((E_SP_REGNUM << 11) | 0x01c0 | E_R12_REGNUM) && r12_tmp) /* add r12,sp */
- pi->frameoffset = r12_tmp;
- else if (insn == ((E_EP_REGNUM << 11) | 0x0000 | E_SP_REGNUM)) /* mov sp,ep */
+ else if (insn == ((E_SP_REGNUM << 11) | 0x01c0 | E_R12_REGNUM) && r12_tmp)
+ /* add r12,sp */
+ pi->sp_offset += r12_tmp;
+ else if (insn == ((E_EP_REGNUM << 11) | 0x0000 | E_SP_REGNUM))
+ /* mov sp,ep */
ep_used = 1;
- else if (insn == ((E_EP_REGNUM << 11) | 0x0000 | E_R1_REGNUM)) /* mov r1,ep */
+ else if (insn == ((E_EP_REGNUM << 11) | 0x0000 | E_R1_REGNUM))
+ /* mov r1,ep */
ep_used = 0;
- else if (((insn & 0x07ff) == (0x0760 | E_SP_REGNUM) /* st.w <reg>,<offset>[sp] */
- || (fp_used
- && (insn & 0x07ff) == (0x0760 | E_FP_RAW_REGNUM))) /* st.w <reg>,<offset>[fp] */
+ else if (((insn & 0x07ff) == (0x0760 | E_SP_REGNUM)
+ || (pi->uses_fp
+ && (insn & 0x07ff) == (0x0760 | E_FP_REGNUM)))
&& pifsr
- && (((reg = (insn >> 11) & 0x1f) >= E_SAVE1_START_REGNUM && reg <= E_SAVE1_END_REGNUM)
- || (reg >= E_SAVE2_START_REGNUM && reg <= E_SAVE2_END_REGNUM)
- || (reg >= E_SAVE3_START_REGNUM && reg <= E_SAVE3_END_REGNUM)))
+ && v850_is_save_register (reg = (insn >> 11) & 0x1f))
{
+ /* st.w <reg>,<offset>[sp] or st.w <reg>,<offset>[fp] */
pifsr->reg = reg;
pifsr->offset = insn2 & ~1;
- pifsr->cur_frameoffset = pi->frameoffset;
-#ifdef DEBUG
- printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
-#endif
+ pifsr->cur_frameoffset = pi->sp_offset;
pifsr++;
}
-
- else if (ep_used /* sst.w <reg>,<offset>[ep] */
+ else if (ep_used
&& ((insn & 0x0781) == 0x0501)
&& pifsr
- && (((reg = (insn >> 11) & 0x1f) >= E_SAVE1_START_REGNUM && reg <= E_SAVE1_END_REGNUM)
- || (reg >= E_SAVE2_START_REGNUM && reg <= E_SAVE2_END_REGNUM)
- || (reg >= E_SAVE3_START_REGNUM && reg <= E_SAVE3_END_REGNUM)))
+ && v850_is_save_register (reg = (insn >> 11) & 0x1f))
{
+ /* sst.w <reg>,<offset>[ep] */
pifsr->reg = reg;
pifsr->offset = (insn & 0x007e) << 1;
- pifsr->cur_frameoffset = pi->frameoffset;
-#ifdef DEBUG
- printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
-#endif
+ pifsr->cur_frameoffset = pi->sp_offset;
pifsr++;
}
-
-#ifdef DEBUG
- printf_filtered ("\n");
-#endif
}
- if (pifsr)
- pifsr->framereg = 0; /* Tie off last entry */
-
- /* Fix up any offsets to the final offset. If a frame pointer was created, use it
- instead of the stack pointer. */
- for (pifsr_tmp = pi->pifsrs; pifsr_tmp && pifsr_tmp != pifsr; pifsr_tmp++)
+ /* Fix up any offsets to the final offset. If a frame pointer was created,
+ use it instead of the stack pointer. */
+ for (pifsr_tmp = pifsrs; pifsr_tmp != pifsr; pifsr_tmp++)
{
- pifsr_tmp->offset -= pi->frameoffset - pifsr_tmp->cur_frameoffset;
- pifsr_tmp->framereg = pi->framereg;
-
-#ifdef DEBUG
- printf_filtered ("Saved register r%d, offset = %d, framereg = r%d\n",
- pifsr_tmp->reg, pifsr_tmp->offset, pifsr_tmp->framereg);
-#endif
+ pifsr_tmp->offset -= pi->sp_offset - pifsr_tmp->cur_frameoffset;
+ pi->saved_regs[pifsr_tmp->reg].addr = pifsr_tmp->offset;
}
-#ifdef DEBUG
- printf_filtered ("Framereg = r%d, frameoffset = %d\n", pi->framereg, pi->frameoffset);
-#endif
-
return current_pc;
}
-/* Function: find_callers_reg
- Find REGNUM on the stack. Otherwise, it's in an active register.
- One thing we might want to do here is to check REGNUM against the
- clobber mask, and somehow flag it as invalid if it isn't saved on
- the stack somewhere. This would provide a graceful failure mode
- when trying to get the value of caller-saves registers for an inner
- frame. */
-
-CORE_ADDR
-v850_find_callers_reg (struct frame_info *fi, int regnum)
-{
- for (; fi; fi = fi->next)
- if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
- return deprecated_read_register_dummy (fi->pc, fi->frame, regnum);
- else if (fi->saved_regs[regnum] != 0)
- return read_memory_unsigned_integer (fi->saved_regs[regnum],
- v850_register_raw_size (regnum));
-
- return read_register (regnum);
-}
-
-/* Function: frame_chain
- Figure out the frame prior to FI. Unfortunately, this involves
- scanning the prologue of the caller, which will also be done
- shortly by v850_init_extra_frame_info. For the dummy frame, we
- just return the stack pointer that was in use at the time the
- function call was made. */
-
-CORE_ADDR
-v850_frame_chain (struct frame_info *fi)
-{
- struct prologue_info pi;
- CORE_ADDR callers_pc, fp;
-
- /* First, find out who called us */
- callers_pc = FRAME_SAVED_PC (fi);
- /* If caller is a call-dummy, then our FP bears no relation to his FP! */
- fp = v850_find_callers_reg (fi, E_FP_RAW_REGNUM);
- if (PC_IN_CALL_DUMMY (callers_pc, fp, fp))
- return fp; /* caller is call-dummy: return oldest value of FP */
-
- /* Caller is NOT a call-dummy, so everything else should just work.
- Even if THIS frame is a call-dummy! */
- pi.pifsrs = NULL;
-
- v850_scan_prologue (callers_pc, &pi);
-
- if (pi.start_function)
- return 0; /* Don't chain beyond the start function */
-
- if (pi.framereg == E_FP_RAW_REGNUM)
- return v850_find_callers_reg (fi, pi.framereg);
-
- return fi->frame - pi.frameoffset;
-}
-
-/* Function: skip_prologue
- Return the address of the first code past the prologue of the function. */
+/* Return the address of the first code past the prologue of the function. */
-CORE_ADDR
-v850_skip_prologue (CORE_ADDR pc)
+static CORE_ADDR
+v850_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
{
CORE_ADDR func_addr, func_end;
- /* See what the symbol table says */
+ /* See what the symbol table says. */
if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
{
struct symtab_and_line sal;
sal = find_pc_line (func_addr, 0);
-
if (sal.line != 0 && sal.end < func_end)
return sal.end;
- else
- /* Either there's no line info, or the line after the prologue is after
- the end of the function. In this case, there probably isn't a
- prologue. */
- return pc;
+
+ /* Either there's no line info, or the line after the prologue is after
+ the end of the function. In this case, there probably isn't a
+ prologue. */
+ return pc;
}
-/* We can't find the start of this function, so there's nothing we can do. */
+ /* We can't find the start of this function, so there's nothing we
+ can do. */
return pc;
}
-/* Function: pop_frame
- This routine gets called when either the user uses the `return'
- command, or the call dummy breakpoint gets hit. */
-
-void
-v850_pop_frame (void)
+static CORE_ADDR
+v850_frame_align (struct gdbarch *ignore, CORE_ADDR sp)
{
- struct frame_info *frame = get_current_frame ();
- int regnum;
-
- if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame))
- generic_pop_dummy_frame ();
- else
- {
- write_register (E_PC_REGNUM, FRAME_SAVED_PC (frame));
-
- for (regnum = 0; regnum < E_NUM_REGS; regnum++)
- if (frame->saved_regs[regnum] != 0)
- write_register (regnum,
- read_memory_unsigned_integer (frame->saved_regs[regnum],
- v850_register_raw_size (regnum)));
-
- write_register (E_SP_REGNUM, get_frame_base (frame));
- }
-
- flush_cached_frames ();
+ return sp & ~3;
}
-/* Function: push_arguments
- Setup arguments and RP for a call to the target. First four args
+/* Setup arguments and LP for a call to the target. First four args
go in R6->R9, subsequent args go into sp + 16 -> sp + ... Structs
- are passed by reference. 64 bit quantities (doubles and long
- longs) may be split between the regs and the stack. When calling a
- function that returns a struct, a pointer to the struct is passed
- in as a secret first argument (always in R6).
+ are passed by reference. 64 bit quantities (doubles and long longs)
+ may be split between the regs and the stack. When calling a function
+ that returns a struct, a pointer to the struct is passed in as a secret
+ first argument (always in R6).
- Stack space for the args has NOT been allocated: that job is up to us.
- */
+ Stack space for the args has NOT been allocated: that job is up to us. */
-CORE_ADDR
-v850_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr)
+static CORE_ADDR
+v850_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)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int argreg;
int argnum;
int len = 0;
int stack_offset;
- /* First, just for safety, make sure stack is aligned */
- sp &= ~3;
-
/* The offset onto the stack at which we will start copying parameters
(after the registers are used up) begins at 16 rather than at zero.
- I don't really know why, that's just the way it seems to work. */
+ That's how the ABI is defined, though there's no indication that these
+ 16 bytes are used for anything, not even for saving incoming
+ argument registers. */
stack_offset = 16;
- /* Now make space on the stack for the args. */
+ /* Now make space on the stack for the args. */
for (argnum = 0; argnum < nargs; argnum++)
- len += ((TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 3) & ~3);
- sp -= len + stack_offset; /* possibly over-allocating, but it works... */
- /* (you might think we could allocate 16 bytes */
- /* less, but the ABI seems to use it all! ) */
+ len += ((TYPE_LENGTH (value_type (args[argnum])) + 3) & ~3);
+ sp -= len + stack_offset;
argreg = E_ARG0_REGNUM;
- /* the struct_return pointer occupies the first parameter-passing reg */
+ /* The struct_return pointer occupies the first parameter register. */
if (struct_return)
- argreg++;
+ regcache_cooked_write_unsigned (regcache, argreg++, struct_addr);
/* Now load as many as possible of the first arguments into
registers, and push the rest onto the stack. There are 16 bytes
for (argnum = 0; argnum < nargs; argnum++)
{
int len;
- char *val;
- char valbuf[v850_register_raw_size (E_ARG0_REGNUM)];
+ gdb_byte *val;
+ gdb_byte valbuf[v850_reg_size];
- if (!v850_type_is_scalar (VALUE_TYPE (*args))
- && TYPE_LENGTH (VALUE_TYPE (*args)) > E_MAX_RETTYPE_SIZE_IN_REGS)
+ if (!v850_type_is_scalar (value_type (*args))
+ && TYPE_LENGTH (value_type (*args)) > E_MAX_RETTYPE_SIZE_IN_REGS)
{
- store_address (valbuf, 4, VALUE_ADDRESS (*args));
+ store_unsigned_integer (valbuf, 4, byte_order,
+ value_address (*args));
len = 4;
val = valbuf;
}
else
{
- len = TYPE_LENGTH (VALUE_TYPE (*args));
- val = (char *) VALUE_CONTENTS (*args);
+ len = TYPE_LENGTH (value_type (*args));
+ val = (gdb_byte *) value_contents (*args);
}
while (len > 0)
{
CORE_ADDR regval;
- regval = extract_address (val, v850_register_raw_size (argreg));
- write_register (argreg, regval);
+ regval = extract_unsigned_integer (val, v850_reg_size, byte_order);
+ regcache_cooked_write_unsigned (regcache, argreg, regval);
- len -= v850_register_raw_size (argreg);
- val += v850_register_raw_size (argreg);
+ len -= v850_reg_size;
+ val += v850_reg_size;
argreg++;
}
else
}
args++;
}
- return sp;
-}
-/* Function: push_return_address (pc)
- Set up the return address for the inferior function call.
- Needed for targets where we don't actually execute a JSR/BSR instruction */
+ /* Store return address. */
+ regcache_cooked_write_unsigned (regcache, E_LP_REGNUM, bp_addr);
-CORE_ADDR
-v850_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
-{
- write_register (E_RP_REGNUM, CALL_DUMMY_ADDRESS ());
- return sp;
-}
+ /* Update stack pointer. */
+ regcache_cooked_write_unsigned (regcache, E_SP_REGNUM, sp);
-/* Function: frame_saved_pc
- Find the caller of this frame. We do this by seeing if E_RP_REGNUM
- is saved in the stack anywhere, otherwise we get it from the
- registers. If the inner frame is a dummy frame, return its PC
- instead of RP, because that's where "caller" of the dummy-frame
- will be found. */
-
-CORE_ADDR
-v850_frame_saved_pc (struct frame_info *fi)
-{
- if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
- return deprecated_read_register_dummy (fi->pc, fi->frame, E_PC_REGNUM);
- else
- return v850_find_callers_reg (fi, E_RP_REGNUM);
+ return sp;
}
-
-/* Function: fix_call_dummy
- Pokes the callee function's address into the CALL_DUMMY assembly stub.
- Assumes that the CALL_DUMMY looks like this:
- jarl <offset24>, r31
- trap
- */
-
-void
-v850_fix_call_dummy (char *dummy, CORE_ADDR sp, CORE_ADDR fun, int nargs,
- struct value **args, struct type *type, int gcc_p)
+static void
+v850_extract_return_value (struct type *type, struct regcache *regcache,
+ gdb_byte *valbuf)
{
- long offset24;
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ int len = TYPE_LENGTH (type);
- offset24 = (long) fun - (long) entry_point_address ();
- offset24 &= 0x3fffff;
- offset24 |= 0xff800000; /* jarl <offset24>, r31 */
-
- store_unsigned_integer ((unsigned int *) &dummy[2], 2, offset24 & 0xffff);
- store_unsigned_integer ((unsigned int *) &dummy[0], 2, offset24 >> 16);
-}
+ if (len <= v850_reg_size)
+ {
+ ULONGEST val;
-static CORE_ADDR
-v850_saved_pc_after_call (struct frame_info *ignore)
-{
- return read_register (E_RP_REGNUM);
+ regcache_cooked_read_unsigned (regcache, E_V0_REGNUM, &val);
+ store_unsigned_integer (valbuf, len, byte_order, val);
+ }
+ else if (len <= 2 * v850_reg_size)
+ {
+ int i, regnum = E_V0_REGNUM;
+ gdb_byte buf[v850_reg_size];
+ for (i = 0; len > 0; i += 4, len -= 4)
+ {
+ regcache_raw_read (regcache, regnum++, buf);
+ memcpy (valbuf + i, buf, len > 4 ? 4 : len);
+ }
+ }
}
static void
-v850_extract_return_value (struct type *type, char *regbuf, char *valbuf)
+v850_store_return_value (struct type *type, struct regcache *regcache,
+ const gdb_byte *valbuf)
{
- CORE_ADDR return_buffer;
-
- if (!v850_use_struct_convention (0, type))
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ int len = TYPE_LENGTH (type);
+
+ if (len <= v850_reg_size)
+ regcache_cooked_write_unsigned
+ (regcache, E_V0_REGNUM,
+ extract_unsigned_integer (valbuf, len, byte_order));
+ else if (len <= 2 * v850_reg_size)
{
- /* Scalar return values of <= 8 bytes are returned in
- E_V0_REGNUM to E_V1_REGNUM. */
- memcpy (valbuf,
- ®buf[REGISTER_BYTE (E_V0_REGNUM)],
- TYPE_LENGTH (type));
+ int i, regnum = E_V0_REGNUM;
+ for (i = 0; i < len; i += 4)
+ regcache_raw_write (regcache, regnum++, valbuf + i);
}
- else
- {
- /* Aggregates and return values > 8 bytes are returned in memory,
- pointed to by R6. */
- return_buffer =
- extract_address (regbuf + REGISTER_BYTE (E_V0_REGNUM),
- REGISTER_RAW_SIZE (E_V0_REGNUM));
+}
- read_memory (return_buffer, valbuf, TYPE_LENGTH (type));
- }
+static enum return_value_convention
+v850_return_value (struct gdbarch *gdbarch, struct value *function,
+ struct type *type, struct regcache *regcache,
+ gdb_byte *readbuf, const gdb_byte *writebuf)
+{
+ if (v850_use_struct_convention (type))
+ return RETURN_VALUE_STRUCT_CONVENTION;
+ if (writebuf)
+ v850_store_return_value (type, regcache, writebuf);
+ else if (readbuf)
+ v850_extract_return_value (type, regcache, readbuf);
+ return RETURN_VALUE_REGISTER_CONVENTION;
}
const static unsigned char *
-v850_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
+v850_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, int *lenptr)
{
static unsigned char breakpoint[] = { 0x85, 0x05 };
*lenptr = sizeof (breakpoint);
return breakpoint;
}
-static CORE_ADDR
-v850_extract_struct_value_address (char *regbuf)
+static struct v850_frame_cache *
+v850_alloc_frame_cache (struct frame_info *this_frame)
{
- return extract_address (regbuf + v850_register_byte (E_V0_REGNUM),
- v850_register_raw_size (E_V0_REGNUM));
-}
+ struct v850_frame_cache *cache;
-static void
-v850_store_return_value (struct type *type, char *valbuf)
-{
- CORE_ADDR return_buffer;
+ cache = FRAME_OBSTACK_ZALLOC (struct v850_frame_cache);
+ cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
- if (!v850_use_struct_convention (0, type))
- deprecated_write_register_bytes (REGISTER_BYTE (E_V0_REGNUM), valbuf,
- TYPE_LENGTH (type));
- else
- {
- return_buffer = read_register (E_V0_REGNUM);
- write_memory (return_buffer, valbuf, TYPE_LENGTH (type));
- }
+ /* Base address. */
+ cache->base = 0;
+ cache->sp_offset = 0;
+ cache->pc = 0;
+
+ /* Frameless until proven otherwise. */
+ cache->uses_fp = 0;
+
+ return cache;
}
-static void
-v850_frame_init_saved_regs (struct frame_info *fi)
+static struct v850_frame_cache *
+v850_frame_cache (struct frame_info *this_frame, void **this_cache)
{
- struct prologue_info pi;
- struct pifsr pifsrs[E_NUM_REGS + 1], *pifsr;
- CORE_ADDR func_addr, func_end;
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ struct v850_frame_cache *cache;
+ CORE_ADDR current_pc;
+ int i;
+
+ if (*this_cache)
+ return *this_cache;
+
+ cache = v850_alloc_frame_cache (this_frame);
+ *this_cache = cache;
+
+ /* In principle, for normal frames, fp holds the frame pointer,
+ which holds the base address for the current stack frame.
+ However, for functions that don't need it, the frame pointer is
+ optional. For these "frameless" functions the frame pointer is
+ actually the frame pointer of the calling frame. */
+ cache->base = get_frame_register_unsigned (this_frame, E_FP_REGNUM);
+ if (cache->base == 0)
+ return cache;
- if (!fi->saved_regs)
+ cache->pc = get_frame_func (this_frame);
+ current_pc = get_frame_pc (this_frame);
+ if (cache->pc != 0)
{
- frame_saved_regs_zalloc (fi);
+ ULONGEST ctbp;
+ ctbp = get_frame_register_unsigned (this_frame, E_CTBP_REGNUM);
+ v850_analyze_prologue (gdbarch, cache->pc, current_pc, cache, ctbp);
+ }
- /* The call dummy doesn't save any registers on the stack, so we
- can return now. */
- if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
- return;
+ if (!cache->uses_fp)
+ {
+ /* We didn't find a valid frame, which means that CACHE->base
+ currently holds the frame pointer for our calling frame. If
+ we're at the start of a function, or somewhere half-way its
+ prologue, the function's frame probably hasn't been fully
+ setup yet. Try to reconstruct the base address for the stack
+ frame by looking at the stack pointer. For truly "frameless"
+ functions this might work too. */
+ cache->base = get_frame_register_unsigned (this_frame, E_SP_REGNUM);
+ }
- /* Find the beginning of this function, so we can analyze its
- prologue. */
- if (find_pc_partial_function (fi->pc, NULL, &func_addr, &func_end))
- {
- pi.pifsrs = pifsrs;
+ /* Now that we have the base address for the stack frame we can
+ calculate the value of sp in the calling frame. */
+ trad_frame_set_value (cache->saved_regs, E_SP_REGNUM,
+ cache->base - cache->sp_offset);
- v850_scan_prologue (fi->pc, &pi);
+ /* Adjust all the saved registers such that they contain addresses
+ instead of offsets. */
+ for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
+ if (trad_frame_addr_p (cache->saved_regs, i))
+ cache->saved_regs[i].addr += cache->base;
- if (!fi->next && pi.framereg == E_SP_REGNUM)
- fi->frame = read_register (pi.framereg) - pi.frameoffset;
+ /* The call instruction moves the caller's PC in the callee's LP.
+ Since this is an unwind, do the reverse. Copy the location of LP
+ into PC (the address / regnum) so that a request for PC will be
+ converted into a request for the LP. */
- for (pifsr = pifsrs; pifsr->framereg; pifsr++)
- {
- fi->saved_regs[pifsr->reg] = pifsr->offset + fi->frame;
+ cache->saved_regs[E_PC_REGNUM] = cache->saved_regs[E_LP_REGNUM];
- if (pifsr->framereg == E_SP_REGNUM)
- fi->saved_regs[pifsr->reg] += pi.frameoffset;
- }
- }
- /* Else we're out of luck (can't debug completely stripped code).
- FIXME. */
- }
+ return cache;
}
-/* Function: init_extra_frame_info
- Setup the frame's frame pointer, pc, and frame addresses for saved
- registers. Most of the work is done in scan_prologue().
- Note that when we are called for the last frame (currently active frame),
- that fi->pc and fi->frame will already be setup. However, fi->frame will
- be valid only if this routine uses FP. For previous frames, fi-frame will
- always be correct (since that is derived from v850_frame_chain ()).
+static struct value *
+v850_frame_prev_register (struct frame_info *this_frame,
+ void **this_cache, int regnum)
+{
+ struct v850_frame_cache *cache = v850_frame_cache (this_frame, this_cache);
- We can be called with the PC in the call dummy under two circumstances.
- First, during normal backtracing, second, while figuring out the frame
- pointer just prior to calling the target function (see run_stack_dummy). */
+ gdb_assert (regnum >= 0);
+
+ return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
+}
static void
-v850_init_extra_frame_info (int fromleaf, struct frame_info *fi)
+v850_frame_this_id (struct frame_info *this_frame, void **this_cache,
+ struct frame_id *this_id)
{
- struct prologue_info pi;
+ struct v850_frame_cache *cache = v850_frame_cache (this_frame, this_cache);
- if (fi->next)
- fi->pc = FRAME_SAVED_PC (fi->next);
+ /* This marks the outermost frame. */
+ if (cache->base == 0)
+ return;
- v850_frame_init_saved_regs (fi);
+ *this_id = frame_id_build (cache->saved_regs[E_SP_REGNUM].addr, cache->pc);
}
-static void
-v850_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
+static const struct frame_unwind v850_frame_unwind = {
+ NORMAL_FRAME,
+ default_frame_unwind_stop_reason,
+ v850_frame_this_id,
+ v850_frame_prev_register,
+ NULL,
+ default_frame_sniffer
+};
+
+static CORE_ADDR
+v850_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ return frame_unwind_register_unsigned (next_frame,
+ gdbarch_sp_regnum (gdbarch));
+}
+
+static CORE_ADDR
+v850_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
{
- write_register (E_ARG0_REGNUM, addr);
+ return frame_unwind_register_unsigned (next_frame,
+ gdbarch_pc_regnum (gdbarch));
}
+static struct frame_id
+v850_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
+{
+ CORE_ADDR sp = get_frame_register_unsigned (this_frame,
+ gdbarch_sp_regnum (gdbarch));
+ return frame_id_build (sp, get_frame_pc (this_frame));
+}
+
static CORE_ADDR
-v850_target_read_fp (void)
+v850_frame_base_address (struct frame_info *this_frame, void **this_cache)
{
- return read_register (E_FP_RAW_REGNUM);
+ struct v850_frame_cache *cache = v850_frame_cache (this_frame, this_cache);
+
+ return cache->base;
}
+static const struct frame_base v850_frame_base = {
+ &v850_frame_unwind,
+ v850_frame_base_address,
+ v850_frame_base_address,
+ v850_frame_base_address
+};
+
static struct gdbarch *
v850_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
{
- static LONGEST call_dummy_words[1] = { 0 };
- struct gdbarch_tdep *tdep = NULL;
struct gdbarch *gdbarch;
- int i;
-
- /* find a candidate among the list of pre-declared architectures. */
- arches = gdbarch_list_lookup_by_info (arches, &info);
- if (arches != NULL)
- return (arches->gdbarch);
-
-#if 0
- tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep));
-#endif
- /* Change the register names based on the current machine type. */
+ /* Change the register names based on the current machine type. */
if (info.bfd_arch_info->arch != bfd_arch_v850)
- return 0;
+ return NULL;
- gdbarch = gdbarch_alloc (&info, 0);
+ gdbarch = gdbarch_alloc (&info, NULL);
- for (i = 0; v850_processor_type_table[i].regnames != NULL; i++)
+ switch (info.bfd_arch_info->mach)
{
- if (v850_processor_type_table[i].mach == info.bfd_arch_info->mach)
- {
- v850_register_names = v850_processor_type_table[i].regnames;
- tm_print_insn_info.mach = info.bfd_arch_info->mach;
- break;
- }
+ case bfd_mach_v850:
+ set_gdbarch_register_name (gdbarch, v850_register_name);
+ set_gdbarch_num_regs (gdbarch, E_NUM_OF_V850_REGS);
+ break;
+ case bfd_mach_v850e:
+ case bfd_mach_v850e1:
+ set_gdbarch_register_name (gdbarch, v850e_register_name);
+ set_gdbarch_num_regs (gdbarch, E_NUM_OF_V850E_REGS);
+ break;
+ case bfd_mach_v850e2:
+ case bfd_mach_v850e2v3:
+ set_gdbarch_register_name (gdbarch, v850e2_register_name);
+ set_gdbarch_num_regs (gdbarch, E_NUM_REGS);
+ break;
}
- /*
- * Basic register fields and methods.
- */
- set_gdbarch_num_regs (gdbarch, E_NUM_REGS);
set_gdbarch_num_pseudo_regs (gdbarch, 0);
set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM);
- set_gdbarch_fp_regnum (gdbarch, E_FP_REGNUM);
set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM);
- set_gdbarch_register_name (gdbarch, v850_register_name);
- set_gdbarch_register_size (gdbarch, v850_reg_size);
- set_gdbarch_register_bytes (gdbarch, E_ALL_REGS_SIZE);
- set_gdbarch_register_byte (gdbarch, v850_register_byte);
- set_gdbarch_register_raw_size (gdbarch, v850_register_raw_size);
- set_gdbarch_max_register_raw_size (gdbarch, v850_reg_size);
- set_gdbarch_register_virtual_size (gdbarch, v850_register_raw_size);
- set_gdbarch_max_register_virtual_size (gdbarch, v850_reg_size);
- set_gdbarch_register_virtual_type (gdbarch, v850_reg_virtual_type);
-
- set_gdbarch_read_fp (gdbarch, v850_target_read_fp);
-
- /*
- * Frame Info
- */
- set_gdbarch_init_extra_frame_info (gdbarch, v850_init_extra_frame_info);
- set_gdbarch_frame_init_saved_regs (gdbarch, v850_frame_init_saved_regs);
- set_gdbarch_frame_chain (gdbarch, v850_frame_chain);
- set_gdbarch_saved_pc_after_call (gdbarch, v850_saved_pc_after_call);
- set_gdbarch_frame_saved_pc (gdbarch, v850_frame_saved_pc);
- set_gdbarch_skip_prologue (gdbarch, v850_skip_prologue);
- set_gdbarch_frame_chain_valid (gdbarch, generic_file_frame_chain_valid);
+ set_gdbarch_fp0_regnum (gdbarch, -1);
- /*
- * Miscelany
- */
- /* Stack grows up. */
- set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
- /* PC stops zero byte after a trap instruction
- (which means: exactly on trap instruction). */
- set_gdbarch_decr_pc_after_break (gdbarch, 0);
- /* This value is almost never non-zero... */
- set_gdbarch_function_start_offset (gdbarch, 0);
- /* This value is almost never non-zero... */
- set_gdbarch_frame_args_skip (gdbarch, 0);
- /* OK to default this value to 'unknown'. */
- set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
- /* W/o prototype, coerce float args to double. */
- set_gdbarch_coerce_float_to_double (gdbarch, standard_coerce_float_to_double);
-
- /*
- * Call Dummies
- *
- * These values and methods are used when gdb calls a target function. */
- set_gdbarch_use_generic_dummy_frames (gdbarch, 1);
- set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame);
- set_gdbarch_push_return_address (gdbarch, v850_push_return_address);
- set_gdbarch_deprecated_extract_return_value (gdbarch, v850_extract_return_value);
- set_gdbarch_push_arguments (gdbarch, v850_push_arguments);
- set_gdbarch_pop_frame (gdbarch, v850_pop_frame);
- set_gdbarch_store_struct_return (gdbarch, v850_store_struct_return);
- set_gdbarch_deprecated_store_return_value (gdbarch, v850_store_return_value);
- set_gdbarch_deprecated_extract_struct_value_address (gdbarch, v850_extract_struct_value_address);
- set_gdbarch_use_struct_convention (gdbarch, v850_use_struct_convention);
- set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
- set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
- set_gdbarch_call_dummy_start_offset (gdbarch, 0);
- set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
- set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
- set_gdbarch_call_dummy_length (gdbarch, 0);
- set_gdbarch_pc_in_call_dummy (gdbarch, generic_pc_in_call_dummy);
- set_gdbarch_call_dummy_p (gdbarch, 1);
- set_gdbarch_call_dummy_words (gdbarch, call_dummy_nil);
- set_gdbarch_sizeof_call_dummy_words (gdbarch, 0);
- set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
- /* set_gdbarch_call_dummy_stack_adjust */
- set_gdbarch_fix_call_dummy (gdbarch, v850_fix_call_dummy);
- set_gdbarch_breakpoint_from_pc (gdbarch, v850_breakpoint_from_pc);
+ set_gdbarch_register_type (gdbarch, v850_register_type);
+ set_gdbarch_char_signed (gdbarch, 1);
+ set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT);
+ set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT);
+ set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
+
+ set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
+ set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
+ set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
+
set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT);
set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT);
- set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
- set_gdbarch_extra_stack_alignment_needed (gdbarch, 0);
+ set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
+ set_gdbarch_breakpoint_from_pc (gdbarch, v850_breakpoint_from_pc);
+
+ set_gdbarch_return_value (gdbarch, v850_return_value);
+ set_gdbarch_push_dummy_call (gdbarch, v850_push_dummy_call);
+ set_gdbarch_skip_prologue (gdbarch, v850_skip_prologue);
+
+ set_gdbarch_print_insn (gdbarch, print_insn_v850);
+
+ set_gdbarch_frame_align (gdbarch, v850_frame_align);
+ set_gdbarch_unwind_sp (gdbarch, v850_unwind_sp);
+ set_gdbarch_unwind_pc (gdbarch, v850_unwind_pc);
+ set_gdbarch_dummy_id (gdbarch, v850_dummy_id);
+ frame_base_set_default (gdbarch, &v850_frame_base);
+
+ /* Hook in ABI-specific overrides, if they have been registered. */
+ gdbarch_init_osabi (info, gdbarch);
+
+ dwarf2_append_unwinders (gdbarch);
+ frame_unwind_append_unwinder (gdbarch, &v850_frame_unwind);
return gdbarch;
}
+extern initialize_file_ftype _initialize_v850_tdep; /* -Wmissing-prototypes */
+
void
_initialize_v850_tdep (void)
{
- tm_print_insn = print_insn_v850;
register_gdbarch_init (bfd_arch_v850, v850_gdbarch_init);
}
projects / thirdparty / binutils-gdb.git / blobdiff