--- /dev/null
+/* Target-dependent code for Analog Devices Blackfin processor, for GDB.
+
+ Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010
+ Free Software Foundation, Inc.
+
+ Contributed by Analog Devices, 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 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ 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, see <http://www.gnu.org/licenses/>. */
+
+#include "defs.h"
+#include "gdb_string.h"
+#include "inferior.h"
+#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 "dwarf2-frame.h"
+#include "symtab.h"
+#include "elf-bfd.h"
+#include "elf/bfin.h"
+#include "osabi.h"
+#include "infcall.h"
+#include "xml-syscall.h"
+#include "bfin-tdep.h"
+
+/* Macros used by prologue functions. */
+#define P_LINKAGE 0xE800
+#define P_MINUS_SP1 0x0140
+#define P_MINUS_SP2 0x05C0
+#define P_MINUS_SP3 0x0540
+#define P_MINUS_SP4 0x04C0
+#define P_SP_PLUS 0x6C06
+#define P_P2_LOW 0xE10A
+#define P_P2_HIGH 0XE14A
+#define P_SP_EQ_SP_PLUS_P2 0X5BB2
+#define P_SP_EQ_P2_PLUS_SP 0x5B96
+#define P_MINUS_MINUS_SP_EQ_RETS 0x0167
+
+/* Macros used for program flow control. */
+/* 16 bit instruction, max */
+#define P_16_BIT_INSR_MAX 0xBFFF
+/* 32 bit instruction, min */
+#define P_32_BIT_INSR_MIN 0xC000
+/* 32 bit instruction, max */
+#define P_32_BIT_INSR_MAX 0xE801
+/* jump (preg), 16-bit, min */
+#define P_JUMP_PREG_MIN 0x0050
+/* jump (preg), 16-bit, max */
+#define P_JUMP_PREG_MAX 0x0057
+/* jump (pc+preg), 16-bit, min */
+#define P_JUMP_PC_PLUS_PREG_MIN 0x0080
+/* jump (pc+preg), 16-bit, max */
+#define P_JUMP_PC_PLUS_PREG_MAX 0x0087
+/* jump.s pcrel13m2, 16-bit, min */
+#define P_JUMP_S_MIN 0x2000
+/* jump.s pcrel13m2, 16-bit, max */
+#define P_JUMP_S_MAX 0x2FFF
+/* jump.l pcrel25m2, 32-bit, min */
+#define P_JUMP_L_MIN 0xE200
+/* jump.l pcrel25m2, 32-bit, max */
+#define P_JUMP_L_MAX 0xE2FF
+/* conditional jump pcrel11m2, 16-bit, min */
+#define P_IF_CC_JUMP_MIN 0x1800
+/* conditional jump pcrel11m2, 16-bit, max */
+#define P_IF_CC_JUMP_MAX 0x1BFF
+/* conditional jump(bp) pcrel11m2, 16-bit, min */
+#define P_IF_CC_JUMP_BP_MIN 0x1C00
+/* conditional jump(bp) pcrel11m2, 16-bit, max */
+#define P_IF_CC_JUMP_BP_MAX 0x1FFF
+/* conditional !jump pcrel11m2, 16-bit, min */
+#define P_IF_NOT_CC_JUMP_MIN 0x1000
+/* conditional !jump pcrel11m2, 16-bit, max */
+#define P_IF_NOT_CC_JUMP_MAX 0x13FF
+/* conditional jump(bp) pcrel11m2, 16-bit, min */
+#define P_IF_NOT_CC_JUMP_BP_MIN 0x1400
+/* conditional jump(bp) pcrel11m2, 16-bit, max */
+#define P_IF_NOT_CC_JUMP_BP_MAX 0x17FF
+/* call (preg), 16-bit, min */
+#define P_CALL_PREG_MIN 0x0060
+/* call (preg), 16-bit, max */
+#define P_CALL_PREG_MAX 0x0067
+/* call (pc+preg), 16-bit, min */
+#define P_CALL_PC_PLUS_PREG_MIN 0x0070
+/* call (pc+preg), 16-bit, max */
+#define P_CALL_PC_PLUS_PREG_MAX 0x0077
+/* call pcrel25m2, 32-bit, min */
+#define P_CALL_MIN 0xE300
+/* call pcrel25m2, 32-bit, max */
+#define P_CALL_MAX 0xE3FF
+/* RTS */
+#define P_RTS 0x0010
+/* MNOP */
+#define P_MNOP 0xC803
+/* EXCPT, 16-bit, min */
+#define P_EXCPT_MIN 0x00A0
+/* EXCPT, 16-bit, max */
+#define P_EXCPT_MAX 0x00AF
+/* multi instruction mask 1, 16-bit */
+#define P_BIT_MULTI_INS_1 0xC000
+/* multi instruction mask 2, 16-bit */
+#define P_BIT_MULTI_INS_2 0x0800
+
+/* The maximum bytes we search to skip the prologue. */
+#define UPPER_LIMIT 40
+
+/* ASTAT bits */
+#define ASTAT_CC_POS 5
+#define ASTAT_CC (1 << ASTAT_CC_POS)
+
+/* Initial value: Register names used in BFIN's ISA documentation. */
+
+static const char * const bfin_register_name_strings[] =
+{
+ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+ "p0", "p1", "p2", "p3", "p4", "p5", "sp", "fp",
+ "i0", "i1", "i2", "i3", "m0", "m1", "m2", "m3",
+ "b0", "b1", "b2", "b3", "l0", "l1", "l2", "l3",
+ "a0x", "a0w", "a1x", "a1w", "astat", "rets",
+ "lc0", "lt0", "lb0", "lc1", "lt1", "lb1", "cycles", "cycles2",
+ "usp", "seqstat", "syscfg", "reti", "retx", "retn", "rete",
+ "pc", "cc",
+};
+
+#define NUM_BFIN_REGNAMES ARRAY_SIZE (bfin_register_name_strings)
+
+
+/* In this diagram successive memory locations increase downwards or the
+ stack grows upwards with negative indices. (PUSH analogy for stack.)
+
+ The top frame is the "frame" of the current function being executed.
+
+ +--------------+ SP -
+ | local vars | ^
+ +--------------+ |
+ | save regs | |
+ +--------------+ FP |
+ | old FP -|-- top
+ +--------------+ | frame
+ | RETS | | |
+ +--------------+ | |
+ | param 1 | | |
+ | param 2 | | |
+ | ... | | V
+ +--------------+ | -
+ | local vars | | ^
+ +--------------+ | |
+ | save regs | | |
+ +--------------+<- |
+ | old FP -|-- next
+ +--------------+ | frame
+ | RETS | | |
+ +--------------+ | |
+ | param 1 | | |
+ | param 2 | | |
+ | ... | | V
+ +--------------+ | -
+ | local vars | | ^
+ +--------------+ | |
+ | save regs | | |
+ +--------------+<- next frame
+ | old FP | |
+ +--------------+ |
+ | RETS | V
+ +--------------+ -
+
+ The frame chain is formed as following:
+
+ FP has the topmost frame.
+ FP + 4 has the previous FP and so on. */
+
+
+/* Map from DWARF2 register number to GDB register number. */
+
+static const int map_gcc_gdb[] =
+{
+ BFIN_R0_REGNUM,
+ BFIN_R1_REGNUM,
+ BFIN_R2_REGNUM,
+ BFIN_R3_REGNUM,
+ BFIN_R4_REGNUM,
+ BFIN_R5_REGNUM,
+ BFIN_R6_REGNUM,
+ BFIN_R7_REGNUM,
+ BFIN_P0_REGNUM,
+ BFIN_P1_REGNUM,
+ BFIN_P2_REGNUM,
+ BFIN_P3_REGNUM,
+ BFIN_P4_REGNUM,
+ BFIN_P5_REGNUM,
+ BFIN_SP_REGNUM,
+ BFIN_FP_REGNUM,
+ BFIN_I0_REGNUM,
+ BFIN_I1_REGNUM,
+ BFIN_I2_REGNUM,
+ BFIN_I3_REGNUM,
+ BFIN_B0_REGNUM,
+ BFIN_B1_REGNUM,
+ BFIN_B2_REGNUM,
+ BFIN_B3_REGNUM,
+ BFIN_L0_REGNUM,
+ BFIN_L1_REGNUM,
+ BFIN_L2_REGNUM,
+ BFIN_L3_REGNUM,
+ BFIN_M0_REGNUM,
+ BFIN_M1_REGNUM,
+ BFIN_M2_REGNUM,
+ BFIN_M3_REGNUM,
+ BFIN_A0_DOT_X_REGNUM,
+ BFIN_A1_DOT_X_REGNUM,
+ BFIN_CC_REGNUM,
+ BFIN_RETS_REGNUM,
+ BFIN_RETI_REGNUM,
+ BFIN_RETX_REGNUM,
+ BFIN_RETN_REGNUM,
+ BFIN_RETE_REGNUM,
+ BFIN_ASTAT_REGNUM,
+ BFIN_SEQSTAT_REGNUM,
+ BFIN_USP_REGNUM,
+ BFIN_LT0_REGNUM,
+ BFIN_LT1_REGNUM,
+ BFIN_LC0_REGNUM,
+ BFIN_LC1_REGNUM,
+ BFIN_LB0_REGNUM,
+ BFIN_LB1_REGNUM
+};
+
+
+struct bfin_frame_cache
+{
+ /* Base address. */
+ CORE_ADDR base;
+ CORE_ADDR sp_offset;
+ CORE_ADDR pc;
+ int frameless_pc_value;
+
+ /* Saved registers. */
+ CORE_ADDR saved_regs[BFIN_NUM_REGS];
+ CORE_ADDR saved_sp;
+
+ /* Stack space reserved for local variables. */
+ long locals;
+};
+
+/* Allocate and initialize a frame cache. */
+
+static struct bfin_frame_cache *
+bfin_alloc_frame_cache (void)
+{
+ struct bfin_frame_cache *cache;
+ int i;
+
+ cache = FRAME_OBSTACK_ZALLOC (struct bfin_frame_cache);
+
+ /* Base address. */
+ cache->base = 0;
+ cache->sp_offset = -4;
+ cache->pc = 0;
+ cache->frameless_pc_value = 0;
+
+ /* Saved registers. We initialize these to -1 since zero is a valid
+ offset (that's where fp is supposed to be stored). */
+ for (i = 0; i < BFIN_NUM_REGS; i++)
+ cache->saved_regs[i] = -1;
+
+ /* Frameless until proven otherwise. */
+ cache->locals = -1;
+
+ return cache;
+}
+
+static struct bfin_frame_cache *
+bfin_frame_cache (struct frame_info *this_frame, void **this_cache)
+{
+ struct bfin_frame_cache *cache;
+ int i;
+
+ if (*this_cache)
+ return *this_cache;
+
+ cache = bfin_alloc_frame_cache ();
+ *this_cache = cache;
+
+ cache->base = get_frame_register_unsigned (this_frame, BFIN_FP_REGNUM);
+ if (cache->base == 0)
+ return cache;
+
+ /* For normal frames, PC is stored at [FP + 4]. */
+ cache->saved_regs[BFIN_PC_REGNUM] = 4;
+ cache->saved_regs[BFIN_FP_REGNUM] = 0;
+
+ /* Adjust all the saved registers such that they contain addresses
+ instead of offsets. */
+ for (i = 0; i < BFIN_NUM_REGS; i++)
+ if (cache->saved_regs[i] != -1)
+ cache->saved_regs[i] += cache->base;
+
+ cache->pc = get_frame_func (this_frame) ;
+ if (cache->pc == 0 || cache->pc == get_frame_pc (this_frame))
+ {
+ /* Either there is no prologue (frameless function) or we are at
+ the start of a function. In short we do not have a frame.
+ PC is stored in rets register. FP points to previous frame. */
+
+ cache->saved_regs[BFIN_PC_REGNUM] =
+ get_frame_register_unsigned (this_frame, BFIN_RETS_REGNUM);
+ cache->frameless_pc_value = 1;
+ cache->base = get_frame_register_unsigned (this_frame, BFIN_FP_REGNUM);
+ cache->saved_regs[BFIN_FP_REGNUM] = cache->base;
+ cache->saved_sp = cache->base;
+ }
+ else
+ {
+ cache->frameless_pc_value = 0;
+
+ /* Now that we have the base address for the stack frame we can
+ calculate the value of SP in the calling frame. */
+ cache->saved_sp = cache->base + 8;
+ }
+
+ return cache;
+}
+
+static void
+bfin_frame_this_id (struct frame_info *this_frame,
+ void **this_cache,
+ struct frame_id *this_id)
+{
+ struct bfin_frame_cache *cache = bfin_frame_cache (this_frame, this_cache);
+
+ /* This marks the outermost frame. */
+ if (cache->base == 0)
+ return;
+
+ /* See the end of bfin_push_dummy_call. */
+ *this_id = frame_id_build (cache->base + 8, cache->pc);
+}
+
+static struct value *
+bfin_frame_prev_register (struct frame_info *this_frame,
+ void **this_cache,
+ int regnum)
+{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ struct bfin_frame_cache *cache = bfin_frame_cache (this_frame, this_cache);
+
+ if (regnum == gdbarch_sp_regnum (gdbarch) && cache->saved_sp)
+ return frame_unwind_got_constant (this_frame, regnum, cache->saved_sp);
+
+ if (regnum < BFIN_NUM_REGS && cache->saved_regs[regnum] != -1)
+ return frame_unwind_got_memory (this_frame, regnum,
+ cache->saved_regs[regnum]);
+
+ return frame_unwind_got_register (this_frame, regnum, regnum);
+}
+
+static const struct frame_unwind bfin_frame_unwind =
+{
+ NORMAL_FRAME,
+ bfin_frame_this_id,
+ bfin_frame_prev_register,
+ NULL,
+ default_frame_sniffer
+};
+
+/* Check for "[--SP] = <reg>;" insns. These are appear in function
+ prologues to save misc registers onto the stack. */
+
+static int
+is_minus_minus_sp (int op)
+{
+ op &= 0xFFC0;
+
+ if ((op == P_MINUS_SP1) || (op == P_MINUS_SP2)
+ || (op == P_MINUS_SP3) || (op == P_MINUS_SP4))
+ return 1;
+
+ return 0;
+}
+
+/* Skip all the insns that appear in generated function prologues. */
+
+static CORE_ADDR
+bfin_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ int op = read_memory_unsigned_integer (pc, 2, byte_order);
+ CORE_ADDR orig_pc = pc;
+ int done = 0;
+
+ /* The new gcc prologue generates the register saves BEFORE the link
+ or RETS saving instruction.
+ So, our job is to stop either at those instructions or some upper
+ limit saying there is no frame! */
+
+ while (!done)
+ {
+ if (is_minus_minus_sp (op))
+ {
+ while (is_minus_minus_sp (op))
+ {
+ pc += 2;
+ op = read_memory_unsigned_integer (pc, 2, byte_order);
+ }
+
+ if (op == P_LINKAGE)
+ pc += 4;
+
+ done = 1;
+ }
+ else if (op == P_LINKAGE)
+ {
+ pc += 4;
+ done = 1;
+ }
+ else if (op == P_MINUS_MINUS_SP_EQ_RETS)
+ {
+ pc += 2;
+ done = 1;
+ }
+ else if (op == P_RTS)
+ {
+ done = 1;
+ }
+ else if ((op >= P_JUMP_PREG_MIN && op <= P_JUMP_PREG_MAX)
+ || (op >= P_JUMP_PC_PLUS_PREG_MIN
+ && op <= P_JUMP_PC_PLUS_PREG_MAX)
+ || (op == P_JUMP_S_MIN && op <= P_JUMP_S_MAX))
+ {
+ done = 1;
+ }
+ else if (pc - orig_pc >= UPPER_LIMIT)
+ {
+ warning (_("Function Prologue not recognised; "
+ "pc will point to ENTRY_POINT of the function"));
+ pc = orig_pc + 2;
+ done = 1;
+ }
+ else
+ {
+ pc += 2; /* Not a terminating instruction go on. */
+ op = read_memory_unsigned_integer (pc, 2, byte_order);
+ }
+ }
+
+ /* TODO:
+ Dwarf2 uses entry point value AFTER some register initializations.
+ We should perhaps skip such asssignments as well (R6 = R1, ...). */
+
+ return pc;
+}
+
+/* Return the GDB type object for the "standard" data type of data in
+ register N. This should be void pointer for P0-P5, SP, FP;
+ void pointer to function for PC; int otherwise. */
+
+static struct type *
+bfin_register_type (struct gdbarch *gdbarch, int regnum)
+{
+ if ((regnum >= BFIN_P0_REGNUM && regnum <= BFIN_FP_REGNUM)
+ || regnum == BFIN_USP_REGNUM)
+ return builtin_type (gdbarch)->builtin_data_ptr;
+
+ if (regnum == BFIN_PC_REGNUM || regnum == BFIN_RETS_REGNUM ||
+ regnum == BFIN_RETI_REGNUM || regnum == BFIN_RETX_REGNUM ||
+ regnum == BFIN_RETN_REGNUM || regnum == BFIN_RETE_REGNUM ||
+ regnum == BFIN_LT0_REGNUM || regnum == BFIN_LB0_REGNUM ||
+ regnum == BFIN_LT1_REGNUM || regnum == BFIN_LB1_REGNUM)
+ return builtin_type (gdbarch)->builtin_func_ptr;
+
+ return builtin_type (gdbarch)->builtin_int32;
+}
+
+static CORE_ADDR
+bfin_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);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ char buf[4];
+ int i;
+ long reg_r0, reg_r1, reg_r2;
+ int total_len = 0;
+ enum bfin_abi abi = bfin_abi (gdbarch);
+ CORE_ADDR func_addr = find_function_addr (function, NULL);
+
+ for (i = nargs - 1; i >= 0; i--)
+ {
+ struct type *value_type = value_enclosing_type (args[i]);
+ int len = TYPE_LENGTH (value_type);
+
+ total_len += (len + 3) & ~3;
+ }
+
+ /* At least twelve bytes of stack space must be allocated for the function's
+ arguments, even for functions that have less than 12 bytes of argument
+ data. */
+
+ if (total_len < 12)
+ sp -= 12 - total_len;
+
+ /* Push arguments in reverse order. */
+
+ for (i = nargs - 1; i >= 0; i--)
+ {
+ struct type *value_type = value_enclosing_type (args[i]);
+ struct type *arg_type = check_typedef (value_type);
+ int len = TYPE_LENGTH (value_type);
+ int container_len = (len + 3) & ~3;
+
+ sp -= container_len;
+ write_memory (sp, value_contents_writeable (args[i]), container_len);
+ }
+
+ /* Initialize R0, R1, and R2 to the first 3 words of parameters. */
+
+ reg_r0 = read_memory_integer (sp, 4, byte_order);
+ regcache_cooked_write_unsigned (regcache, BFIN_R0_REGNUM, reg_r0);
+ reg_r1 = read_memory_integer (sp + 4, 4, byte_order);
+ regcache_cooked_write_unsigned (regcache, BFIN_R1_REGNUM, reg_r1);
+ reg_r2 = read_memory_integer (sp + 8, 4, byte_order);
+ regcache_cooked_write_unsigned (regcache, BFIN_R2_REGNUM, reg_r2);
+
+ /* Store struct value address. */
+
+ if (struct_return)
+ regcache_cooked_write_unsigned (regcache, BFIN_P0_REGNUM, struct_addr);
+
+ /* Set the dummy return value to bp_addr.
+ A dummy breakpoint will be setup to execute the call. */
+
+ regcache_cooked_write_unsigned (regcache, BFIN_RETS_REGNUM, bp_addr);
+
+ /* Finally, update the stack pointer. */
+
+ regcache_cooked_write_unsigned (regcache, BFIN_SP_REGNUM, sp);
+
+ return sp;
+}
+
+/* Convert DWARF2 register number REG to the appropriate register number
+ used by GDB. */
+
+static int
+bfin_reg_to_regnum (struct gdbarch *gdbarch, int reg)
+{
+ if (reg > ARRAY_SIZE (map_gcc_gdb))
+ return 0;
+
+ return map_gcc_gdb[reg];
+}
+
+/* This function implements the BREAKPOINT_FROM_PC macro. It returns
+ a pointer to a string of bytes that encode a breakpoint instruction,
+ stores the length of the string to *lenptr, and adjusts the program
+ counter (if necessary) to point to the actual memory location where
+ the breakpoint should be inserted. */
+
+static const unsigned char *
+bfin_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, int *lenptr)
+{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ unsigned short iw;
+ static unsigned char bfin_breakpoint[] = {0xa1, 0x00, 0x00, 0x00};
+ static unsigned char bfin_sim_breakpoint[] = {0x25, 0x00, 0x00, 0x00};
+
+ iw = read_memory_unsigned_integer (*pcptr, 2, byte_order);
+
+ if ((iw & 0xf000) >= 0xc000)
+ /* 32-bit instruction. */
+ *lenptr = 4;
+ else
+ *lenptr = 2;
+
+ if (strcmp (target_shortname, "sim") == 0)
+ return bfin_sim_breakpoint;
+ else
+ return bfin_breakpoint;
+}
+
+static void
+bfin_extract_return_value (struct type *type,
+ struct regcache *regs,
+ gdb_byte *dst)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regs);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ bfd_byte *valbuf = dst;
+ int len = TYPE_LENGTH (type);
+ ULONGEST tmp;
+ int regno = BFIN_R0_REGNUM;
+
+ gdb_assert (len <= 8);
+
+ while (len > 0)
+ {
+ regcache_cooked_read_unsigned (regs, regno++, &tmp);
+ store_unsigned_integer (valbuf, (len > 4 ? 4 : len), tmp, byte_order);
+ len -= 4;
+ valbuf += 4;
+ }
+}
+
+/* Write into appropriate registers a function return value of type
+ TYPE, given in virtual format. */
+
+static void
+bfin_store_return_value (struct type *type,
+ struct regcache *regs,
+ const gdb_byte *src)
+{
+ const bfd_byte *valbuf = src;
+
+ /* Integral values greater than one word are stored in consecutive
+ registers starting with R0. This will always be a multiple of
+ the register size. */
+
+ int len = TYPE_LENGTH (type);
+ int regno = BFIN_R0_REGNUM;
+
+ gdb_assert (len <= 8);
+
+ while (len > 0)
+ {
+ regcache_cooked_write (regs, regno++, valbuf);
+ len -= 4;
+ valbuf += 4;
+ }
+}
+
+/* Determine, for architecture GDBARCH, how a return value of TYPE
+ should be returned. If it is supposed to be returned in registers,
+ and READBUF is nonzero, read the appropriate value from REGCACHE,
+ and copy it into READBUF. If WRITEBUF is nonzero, write the value
+ from WRITEBUF into REGCACHE. */
+
+static enum return_value_convention
+bfin_return_value (struct gdbarch *gdbarch,
+ struct type *func_type,
+ struct type *type,
+ struct regcache *regcache,
+ gdb_byte *readbuf,
+ const gdb_byte *writebuf)
+{
+ if (TYPE_LENGTH (type) > 8)
+ return RETURN_VALUE_STRUCT_CONVENTION;
+
+ if (readbuf)
+ bfin_extract_return_value (type, regcache, readbuf);
+
+ if (writebuf)
+ bfin_store_return_value (type, regcache, writebuf);
+
+ return RETURN_VALUE_REGISTER_CONVENTION;
+}
+
+/* Return the BFIN register name corresponding to register I. */
+
+static const char *
+bfin_register_name (struct gdbarch *gdbarch, int i)
+{
+ return bfin_register_name_strings[i];
+}
+
+static void
+bfin_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
+ int regnum, gdb_byte *buffer)
+{
+ gdb_byte *buf = (gdb_byte *) alloca (MAX_REGISTER_SIZE);
+
+ if (regnum != BFIN_CC_REGNUM)
+ internal_error (__FILE__, __LINE__,
+ _("invalid register number %d"), regnum);
+
+ /* Extract the CC bit from the ASTAT register. */
+ regcache_raw_read (regcache, BFIN_ASTAT_REGNUM, buf);
+ buffer[1] = buffer[2] = buffer[3] = 0;
+ buffer[0] = !!(buf[0] & ASTAT_CC);
+}
+
+static void
+bfin_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
+ int regnum, const gdb_byte *buffer)
+{
+ gdb_byte *buf = (gdb_byte *) alloca (MAX_REGISTER_SIZE);
+
+ if (regnum != BFIN_CC_REGNUM)
+ internal_error (__FILE__, __LINE__,
+ _("invalid register number %d"), regnum);
+
+ /* Overlay the CC bit in the ASTAT register. */
+ regcache_raw_read (regcache, BFIN_ASTAT_REGNUM, buf);
+ buf[0] = (buf[0] & ~ASTAT_CC) | ((buffer[0] & 1) << ASTAT_CC_POS);
+ regcache_raw_write (regcache, BFIN_ASTAT_REGNUM, buf);
+}
+
+static CORE_ADDR
+bfin_frame_base_address (struct frame_info *this_frame, void **this_cache)
+{
+ struct bfin_frame_cache *cache = bfin_frame_cache (this_frame, this_cache);
+
+ return cache->base;
+}
+
+static CORE_ADDR
+bfin_frame_local_address (struct frame_info *this_frame, void **this_cache)
+{
+ struct bfin_frame_cache *cache = bfin_frame_cache (this_frame, this_cache);
+
+ return cache->base - 4;
+}
+
+static CORE_ADDR
+bfin_frame_args_address (struct frame_info *this_frame, void **this_cache)
+{
+ struct bfin_frame_cache *cache = bfin_frame_cache (this_frame, this_cache);
+
+ return cache->base + 8;
+}
+
+static const struct frame_base bfin_frame_base =
+{
+ &bfin_frame_unwind,
+ bfin_frame_base_address,
+ bfin_frame_local_address,
+ bfin_frame_args_address
+};
+
+static struct frame_id
+bfin_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
+{
+ CORE_ADDR sp;
+
+ sp = get_frame_register_unsigned (this_frame, BFIN_SP_REGNUM);
+
+ return frame_id_build (sp, get_frame_pc (this_frame));
+}
+
+static CORE_ADDR
+bfin_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ return frame_unwind_register_unsigned (next_frame, BFIN_PC_REGNUM);
+}
+
+static CORE_ADDR
+bfin_frame_align (struct gdbarch *gdbarch, CORE_ADDR address)
+{
+ return (address & ~0x3);
+}
+
+enum bfin_abi
+bfin_abi (struct gdbarch *gdbarch)
+{
+ return gdbarch_tdep (gdbarch)->bfin_abi;
+}
+
+/* Initialize the current architecture based on INFO. If possible,
+ re-use an architecture from ARCHES, which is a list of
+ architectures already created during this debugging session.
+
+ Called e.g. at program startup, when reading a core file, and when
+ reading a binary file. */
+
+static struct gdbarch *
+bfin_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
+{
+ struct gdbarch_tdep *tdep;
+ struct gdbarch *gdbarch;
+ int elf_flags;
+ enum bfin_abi abi;
+
+ /* 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;
+ else
+ elf_flags = 0;
+
+ abi = BFIN_ABI_FLAT;
+
+ /* If there is already a candidate, use it. */
+
+ for (arches = gdbarch_list_lookup_by_info (arches, &info);
+ arches != NULL;
+ arches = gdbarch_list_lookup_by_info (arches->next, &info))
+ {
+ if (gdbarch_tdep (arches->gdbarch)->bfin_abi != abi)
+ continue;
+ return arches->gdbarch;
+ }
+
+ tdep = XMALLOC (struct gdbarch_tdep);
+ gdbarch = gdbarch_alloc (&info, tdep);
+
+ tdep->bfin_abi = abi;
+
+ set_gdbarch_num_regs (gdbarch, BFIN_NUM_REGS);
+ set_gdbarch_pseudo_register_read (gdbarch, bfin_pseudo_register_read);
+ set_gdbarch_pseudo_register_write (gdbarch, bfin_pseudo_register_write);
+ set_gdbarch_num_pseudo_regs (gdbarch, BFIN_NUM_PSEUDO_REGS);
+ set_gdbarch_sp_regnum (gdbarch, BFIN_SP_REGNUM);
+ set_gdbarch_pc_regnum (gdbarch, BFIN_PC_REGNUM);
+ set_gdbarch_ps_regnum (gdbarch, BFIN_ASTAT_REGNUM);
+ set_gdbarch_dwarf2_reg_to_regnum (gdbarch, bfin_reg_to_regnum);
+ set_gdbarch_register_name (gdbarch, bfin_register_name);
+ set_gdbarch_register_type (gdbarch, bfin_register_type);
+ set_gdbarch_dummy_id (gdbarch, bfin_dummy_id);
+ set_gdbarch_push_dummy_call (gdbarch, bfin_push_dummy_call);
+ set_gdbarch_believe_pcc_promotion (gdbarch, 1);
+ set_gdbarch_return_value (gdbarch, bfin_return_value);
+ set_gdbarch_skip_prologue (gdbarch, bfin_skip_prologue);
+ set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
+ set_gdbarch_breakpoint_from_pc (gdbarch, bfin_breakpoint_from_pc);
+ set_gdbarch_decr_pc_after_break (gdbarch, 2);
+ set_gdbarch_frame_args_skip (gdbarch, 8);
+ set_gdbarch_unwind_pc (gdbarch, bfin_unwind_pc);
+ set_gdbarch_frame_align (gdbarch, bfin_frame_align);
+ set_gdbarch_print_insn (gdbarch, print_insn_bfin);
+
+ /* Hook in ABI-specific overrides, if they have been registered. */
+ gdbarch_init_osabi (info, gdbarch);
+
+ dwarf2_append_unwinders (gdbarch);
+
+ frame_base_set_default (gdbarch, &bfin_frame_base);
+
+ frame_unwind_append_unwinder (gdbarch, &bfin_frame_unwind);
+
+ return gdbarch;
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_bfin_tdep;
+
+void
+_initialize_bfin_tdep (void)
+{
+ register_gdbarch_init (bfd_arch_bfin, bfin_gdbarch_init);
+}
--- /dev/null
+<?xml version="1.0"?>
+<!-- Copyright (C) 2010 Free Software Foundation, Inc.
+
+ Copying and distribution of this file, with or without modification,
+ are permitted in any medium without royalty provided the copyright
+ notice and this notice are preserved. -->
+
+<!DOCTYPE feature SYSTEM "gdb-syscalls.dtd">
+
+<!-- This file was generated using the following file:
+
+ gawk '$2 ~ /^__NR_/ { gsub(/__NR_/,""); print " <syscall name=\"" $2 "\" number=\"" $3 "\"/>" }'
+ /usr/src/linux/arch/blackfin/include/asm/unistd.h
+
+ The file mentioned above belongs to the Linux Kernel. -->
+
+<syscalls_info>
+ <syscall name="restart_syscall" number="0"/>
+ <syscall name="exit" number="1"/>
+ <syscall name="fork" number="2"/>
+ <syscall name="read" number="3"/>
+ <syscall name="write" number="4"/>
+ <syscall name="open" number="5"/>
+ <syscall name="close" number="6"/>
+ <syscall name="creat" number="8"/>
+ <syscall name="link" number="9"/>
+ <syscall name="unlink" number="10"/>
+ <syscall name="execve" number="11"/>
+ <syscall name="chdir" number="12"/>
+ <syscall name="time" number="13"/>
+ <syscall name="mknod" number="14"/>
+ <syscall name="chmod" number="15"/>
+ <syscall name="chown" number="16"/>
+ <syscall name="lseek" number="19"/>
+ <syscall name="getpid" number="20"/>
+ <syscall name="mount" number="21"/>
+ <syscall name="setuid" number="23"/>
+ <syscall name="getuid" number="24"/>
+ <syscall name="stime" number="25"/>
+ <syscall name="ptrace" number="26"/>
+ <syscall name="alarm" number="27"/>
+ <syscall name="pause" number="29"/>
+ <syscall name="access" number="33"/>
+ <syscall name="nice" number="34"/>
+ <syscall name="sync" number="36"/>
+ <syscall name="kill" number="37"/>
+ <syscall name="rename" number="38"/>
+ <syscall name="mkdir" number="39"/>
+ <syscall name="rmdir" number="40"/>
+ <syscall name="dup" number="41"/>
+ <syscall name="pipe" number="42"/>
+ <syscall name="times" number="43"/>
+ <syscall name="brk" number="45"/>
+ <syscall name="setgid" number="46"/>
+ <syscall name="getgid" number="47"/>
+ <syscall name="geteuid" number="49"/>
+ <syscall name="getegid" number="50"/>
+ <syscall name="acct" number="51"/>
+ <syscall name="umount2" number="52"/>
+ <syscall name="ioctl" number="54"/>
+ <syscall name="fcntl" number="55"/>
+ <syscall name="setpgid" number="57"/>
+ <syscall name="umask" number="60"/>
+ <syscall name="chroot" number="61"/>
+ <syscall name="ustat" number="62"/>
+ <syscall name="dup2" number="63"/>
+ <syscall name="getppid" number="64"/>
+ <syscall name="getpgrp" number="65"/>
+ <syscall name="setsid" number="66"/>
+ <syscall name="sgetmask" number="68"/>
+ <syscall name="ssetmask" number="69"/>
+ <syscall name="setreuid" number="70"/>
+ <syscall name="setregid" number="71"/>
+ <syscall name="sethostname" number="74"/>
+ <syscall name="setrlimit" number="75"/>
+ <syscall name="getrusage" number="77"/>
+ <syscall name="gettimeofday" number="78"/>
+ <syscall name="settimeofday" number="79"/>
+ <syscall name="getgroups" number="80"/>
+ <syscall name="setgroups" number="81"/>
+ <syscall name="symlink" number="83"/>
+ <syscall name="readlink" number="85"/>
+ <syscall name="reboot" number="88"/>
+ <syscall name="munmap" number="91"/>
+ <syscall name="truncate" number="92"/>
+ <syscall name="ftruncate" number="93"/>
+ <syscall name="fchmod" number="94"/>
+ <syscall name="fchown" number="95"/>
+ <syscall name="getpriority" number="96"/>
+ <syscall name="setpriority" number="97"/>
+ <syscall name="statfs" number="99"/>
+ <syscall name="fstatfs" number="100"/>
+ <syscall name="syslog" number="103"/>
+ <syscall name="setitimer" number="104"/>
+ <syscall name="getitimer" number="105"/>
+ <syscall name="stat" number="106"/>
+ <syscall name="lstat" number="107"/>
+ <syscall name="fstat" number="108"/>
+ <syscall name="vhangup" number="111"/>
+ <syscall name="wait4" number="114"/>
+ <syscall name="sysinfo" number="116"/>
+ <syscall name="fsync" number="118"/>
+ <syscall name="clone" number="120"/>
+ <syscall name="setdomainname" number="121"/>
+ <syscall name="uname" number="122"/>
+ <syscall name="adjtimex" number="124"/>
+ <syscall name="mprotect" number="125"/>
+ <syscall name="init_module" number="128"/>
+ <syscall name="delete_module" number="129"/>
+ <syscall name="quotactl" number="131"/>
+ <syscall name="getpgid" number="132"/>
+ <syscall name="fchdir" number="133"/>
+ <syscall name="bdflush" number="134"/>
+ <syscall name="personality" number="136"/>
+ <syscall name="setfsuid" number="138"/>
+ <syscall name="setfsgid" number="139"/>
+ <syscall name="_llseek" number="140"/>
+ <syscall name="getdents" number="141"/>
+ <syscall name="flock" number="143"/>
+ <syscall name="readv" number="145"/>
+ <syscall name="writev" number="146"/>
+ <syscall name="getsid" number="147"/>
+ <syscall name="fdatasync" number="148"/>
+ <syscall name="_sysctl" number="149"/>
+ <syscall name="sched_setparam" number="154"/>
+ <syscall name="sched_getparam" number="155"/>
+ <syscall name="sched_setscheduler" number="156"/>
+ <syscall name="sched_getscheduler" number="157"/>
+ <syscall name="sched_yield" number="158"/>
+ <syscall name="sched_get_priority_max" number="159"/>
+ <syscall name="sched_get_priority_min" number="160"/>
+ <syscall name="sched_rr_get_interval" number="161"/>
+ <syscall name="nanosleep" number="162"/>
+ <syscall name="mremap" number="163"/>
+ <syscall name="setresuid" number="164"/>
+ <syscall name="getresuid" number="165"/>
+ <syscall name="nfsservctl" number="169"/>
+ <syscall name="setresgid" number="170"/>
+ <syscall name="getresgid" number="171"/>
+ <syscall name="prctl" number="172"/>
+ <syscall name="rt_sigreturn" number="173"/>
+ <syscall name="rt_sigaction" number="174"/>
+ <syscall name="rt_sigprocmask" number="175"/>
+ <syscall name="rt_sigpending" number="176"/>
+ <syscall name="rt_sigtimedwait" number="177"/>
+ <syscall name="rt_sigqueueinfo" number="178"/>
+ <syscall name="rt_sigsuspend" number="179"/>
+ <syscall name="pread" number="180"/>
+ <syscall name="pwrite" number="181"/>
+ <syscall name="lchown" number="182"/>
+ <syscall name="getcwd" number="183"/>
+ <syscall name="capget" number="184"/>
+ <syscall name="capset" number="185"/>
+ <syscall name="sigaltstack" number="186"/>
+ <syscall name="sendfile" number="187"/>
+ <syscall name="vfork" number="190"/>
+ <syscall name="getrlimit" number="191"/>
+ <syscall name="mmap2" number="192"/>
+ <syscall name="truncate64" number="193"/>
+ <syscall name="ftruncate64" number="194"/>
+ <syscall name="stat64" number="195"/>
+ <syscall name="lstat64" number="196"/>
+ <syscall name="fstat64" number="197"/>
+ <syscall name="chown32" number="198"/>
+ <syscall name="getuid32" number="199"/>
+ <syscall name="getgid32" number="200"/>
+ <syscall name="geteuid32" number="201"/>
+ <syscall name="getegid32" number="202"/>
+ <syscall name="setreuid32" number="203"/>
+ <syscall name="setregid32" number="204"/>
+ <syscall name="getgroups32" number="205"/>
+ <syscall name="setgroups32" number="206"/>
+ <syscall name="fchown32" number="207"/>
+ <syscall name="setresuid32" number="208"/>
+ <syscall name="getresuid32" number="209"/>
+ <syscall name="setresgid32" number="210"/>
+ <syscall name="getresgid32" number="211"/>
+ <syscall name="lchown32" number="212"/>
+ <syscall name="setuid32" number="213"/>
+ <syscall name="setgid32" number="214"/>
+ <syscall name="setfsuid32" number="215"/>
+ <syscall name="setfsgid32" number="216"/>
+ <syscall name="pivot_root" number="217"/>
+ <syscall name="getdents64" number="220"/>
+ <syscall name="fcntl64" number="221"/>
+ <syscall name="gettid" number="224"/>
+ <syscall name="readahead" number="225"/>
+ <syscall name="setxattr" number="226"/>
+ <syscall name="lsetxattr" number="227"/>
+ <syscall name="fsetxattr" number="228"/>
+ <syscall name="getxattr" number="229"/>
+ <syscall name="lgetxattr" number="230"/>
+ <syscall name="fgetxattr" number="231"/>
+ <syscall name="listxattr" number="232"/>
+ <syscall name="llistxattr" number="233"/>
+ <syscall name="flistxattr" number="234"/>
+ <syscall name="removexattr" number="235"/>
+ <syscall name="lremovexattr" number="236"/>
+ <syscall name="fremovexattr" number="237"/>
+ <syscall name="tkill" number="238"/>
+ <syscall name="sendfile64" number="239"/>
+ <syscall name="futex" number="240"/>
+ <syscall name="sched_setaffinity" number="241"/>
+ <syscall name="sched_getaffinity" number="242"/>
+ <syscall name="io_setup" number="245"/>
+ <syscall name="io_destroy" number="246"/>
+ <syscall name="io_getevents" number="247"/>
+ <syscall name="io_submit" number="248"/>
+ <syscall name="io_cancel" number="249"/>
+ <syscall name="exit_group" number="252"/>
+ <syscall name="lookup_dcookie" number="253"/>
+ <syscall name="bfin_spinlock" number="254"/>
+ <syscall name="epoll_create" number="255"/>
+ <syscall name="epoll_ctl" number="256"/>
+ <syscall name="epoll_wait" number="257"/>
+ <syscall name="set_tid_address" number="259"/>
+ <syscall name="timer_create" number="260"/>
+ <syscall name="timer_settime" number="261"/>
+ <syscall name="timer_gettime" number="262"/>
+ <syscall name="timer_getoverrun" number="263"/>
+ <syscall name="timer_delete" number="264"/>
+ <syscall name="clock_settime" number="265"/>
+ <syscall name="clock_gettime" number="266"/>
+ <syscall name="clock_getres" number="267"/>
+ <syscall name="clock_nanosleep" number="268"/>
+ <syscall name="statfs64" number="269"/>
+ <syscall name="fstatfs64" number="270"/>
+ <syscall name="tgkill" number="271"/>
+ <syscall name="utimes" number="272"/>
+ <syscall name="fadvise64_64" number="273"/>
+ <syscall name="mq_open" number="278"/>
+ <syscall name="mq_unlink" number="279"/>
+ <syscall name="mq_timedsend" number="280"/>
+ <syscall name="mq_timedreceive" number="281"/>
+ <syscall name="mq_notify" number="282"/>
+ <syscall name="mq_getsetattr" number="283"/>
+ <syscall name="kexec_load" number="284"/>
+ <syscall name="waitid" number="285"/>
+ <syscall name="add_key" number="286"/>
+ <syscall name="request_key" number="287"/>
+ <syscall name="keyctl" number="288"/>
+ <syscall name="ioprio_set" number="289"/>
+ <syscall name="ioprio_get" number="290"/>
+ <syscall name="inotify_init" number="291"/>
+ <syscall name="inotify_add_watch" number="292"/>
+ <syscall name="inotify_rm_watch" number="293"/>
+ <syscall name="openat" number="295"/>
+ <syscall name="mkdirat" number="296"/>
+ <syscall name="mknodat" number="297"/>
+ <syscall name="fchownat" number="298"/>
+ <syscall name="futimesat" number="299"/>
+ <syscall name="fstatat64" number="300"/>
+ <syscall name="unlinkat" number="301"/>
+ <syscall name="renameat" number="302"/>
+ <syscall name="linkat" number="303"/>
+ <syscall name="symlinkat" number="304"/>
+ <syscall name="readlinkat" number="305"/>
+ <syscall name="fchmodat" number="306"/>
+ <syscall name="faccessat" number="307"/>
+ <syscall name="pselect6" number="308"/>
+ <syscall name="ppoll" number="309"/>
+ <syscall name="unshare" number="310"/>
+ <syscall name="sram_alloc" number="311"/>
+ <syscall name="sram_free" number="312"/>
+ <syscall name="dma_memcpy" number="313"/>
+ <syscall name="accept" number="314"/>
+ <syscall name="bind" number="315"/>
+ <syscall name="connect" number="316"/>
+ <syscall name="getpeername" number="317"/>
+ <syscall name="getsockname" number="318"/>
+ <syscall name="getsockopt" number="319"/>
+ <syscall name="listen" number="320"/>
+ <syscall name="recv" number="321"/>
+ <syscall name="recvfrom" number="322"/>
+ <syscall name="recvmsg" number="323"/>
+ <syscall name="send" number="324"/>
+ <syscall name="sendmsg" number="325"/>
+ <syscall name="sendto" number="326"/>
+ <syscall name="setsockopt" number="327"/>
+ <syscall name="shutdown" number="328"/>
+ <syscall name="socket" number="329"/>
+ <syscall name="socketpair" number="330"/>
+ <syscall name="semctl" number="331"/>
+ <syscall name="semget" number="332"/>
+ <syscall name="semop" number="333"/>
+ <syscall name="msgctl" number="334"/>
+ <syscall name="msgget" number="335"/>
+ <syscall name="msgrcv" number="336"/>
+ <syscall name="msgsnd" number="337"/>
+ <syscall name="shmat" number="338"/>
+ <syscall name="shmctl" number="339"/>
+ <syscall name="shmdt" number="340"/>
+ <syscall name="shmget" number="341"/>
+ <syscall name="splice" number="342"/>
+ <syscall name="sync_file_range" number="343"/>
+ <syscall name="tee" number="344"/>
+ <syscall name="vmsplice" number="345"/>
+ <syscall name="epoll_pwait" number="346"/>
+ <syscall name="utimensat" number="347"/>
+ <syscall name="signalfd" number="348"/>
+ <syscall name="timerfd_create" number="349"/>
+ <syscall name="eventfd" number="350"/>
+ <syscall name="pread64" number="351"/>
+ <syscall name="pwrite64" number="352"/>
+ <syscall name="fadvise64" number="353"/>
+ <syscall name="set_robust_list" number="354"/>
+ <syscall name="get_robust_list" number="355"/>
+ <syscall name="fallocate" number="356"/>
+ <syscall name="semtimedop" number="357"/>
+ <syscall name="timerfd_settime" number="358"/>
+ <syscall name="timerfd_gettime" number="359"/>
+ <syscall name="signalfd4" number="360"/>
+ <syscall name="eventfd2" number="361"/>
+ <syscall name="epoll_create1" number="362"/>
+ <syscall name="dup3" number="363"/>
+ <syscall name="pipe2" number="364"/>
+ <syscall name="inotify_init1" number="365"/>
+ <syscall name="preadv" number="366"/>
+ <syscall name="pwritev" number="367"/>
+ <syscall name="rt_tgsigqueueinfo" number="368"/>
+ <syscall name="perf_event_open" number="369"/>
+ <syscall name="recvmmsg" number="370"/>
+ <syscall name="fanotify_init" number="371"/>
+ <syscall name="fanotify_mark" number="372"/>
+ <syscall name="prlimit64" number="373"/>
+</syscalls_info>
projects / binutils-gdb.git / commitdiff