-/* ARC target-dependent stuff.
- Copyright 1995, 1996, 1999, 2000, 2001 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
- (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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#include "defs.h"
-#include "frame.h"
-#include "inferior.h"
-#include "gdbcore.h"
-#include "target.h"
-#include "floatformat.h"
-#include "symtab.h"
-#include "gdbcmd.h"
-#include "regcache.h"
-#include "gdb_string.h"
-
-/* Local functions */
-
-static int arc_set_cpu_type (char *str);
-
-/* Current CPU, set with the "set cpu" command. */
-static int arc_bfd_mach_type;
-char *arc_cpu_type;
-char *tmp_arc_cpu_type;
-
-/* Table of cpu names. */
-struct
- {
- char *name;
- int value;
- }
-arc_cpu_type_table[] =
-{
- { "arc5", bfd_mach_arc_5 },
- { "arc6", bfd_mach_arc_6 },
- { "arc7", bfd_mach_arc_7 },
- { "arc8", bfd_mach_arc_8 },
- { NULL, 0 }
-};
-
-/* Used by simulator. */
-int display_pipeline_p;
-int cpu_timer;
-/* This one must have the same type as used in the emulator.
- It's currently an enum so this should be ok for now. */
-int debug_pipeline_p;
-
-#define ARC_CALL_SAVED_REG(r) ((r) >= 16 && (r) < 24)
-
-#define OPMASK 0xf8000000
-
-/* Instruction field accessor macros.
- See the Programmer's Reference Manual. */
-#define X_OP(i) (((i) >> 27) & 0x1f)
-#define X_A(i) (((i) >> 21) & 0x3f)
-#define X_B(i) (((i) >> 15) & 0x3f)
-#define X_C(i) (((i) >> 9) & 0x3f)
-#define X_D(i) ((((i) & 0x1ff) ^ 0x100) - 0x100)
-#define X_L(i) (((((i) >> 5) & 0x3ffffc) ^ 0x200000) - 0x200000)
-#define X_N(i) (((i) >> 5) & 3)
-#define X_Q(i) ((i) & 0x1f)
-
-/* Return non-zero if X is a short immediate data indicator. */
-#define SHIMM_P(x) ((x) == 61 || (x) == 63)
-
-/* Return non-zero if X is a "long" (32 bit) immediate data indicator. */
-#define LIMM_P(x) ((x) == 62)
-
-/* Build a simple instruction. */
-#define BUILD_INSN(op, a, b, c, d) \
- ((((op) & 31) << 27) \
- | (((a) & 63) << 21) \
- | (((b) & 63) << 15) \
- | (((c) & 63) << 9) \
- | ((d) & 511))
-\f
-/* Codestream stuff. */
-static void codestream_read (unsigned int *, int);
-static void codestream_seek (CORE_ADDR);
-static unsigned int codestream_fill (int);
-
-#define CODESTREAM_BUFSIZ 16
-static CORE_ADDR codestream_next_addr;
-static CORE_ADDR codestream_addr;
-/* FIXME assumes sizeof (int) == 32? */
-static unsigned int codestream_buf[CODESTREAM_BUFSIZ];
-static int codestream_off;
-static int codestream_cnt;
-
-#define codestream_tell() \
- (codestream_addr + codestream_off * sizeof (codestream_buf[0]))
-#define codestream_peek() \
- (codestream_cnt == 0 \
- ? codestream_fill (1) \
- : codestream_buf[codestream_off])
-#define codestream_get() \
- (codestream_cnt-- == 0 \
- ? codestream_fill (0) \
- : codestream_buf[codestream_off++])
-
-static unsigned int
-codestream_fill (int peek_flag)
-{
- codestream_addr = codestream_next_addr;
- codestream_next_addr += CODESTREAM_BUFSIZ * sizeof (codestream_buf[0]);
- codestream_off = 0;
- codestream_cnt = CODESTREAM_BUFSIZ;
- read_memory (codestream_addr, (char *) codestream_buf,
- CODESTREAM_BUFSIZ * sizeof (codestream_buf[0]));
- /* FIXME: check return code? */
-
-
- /* Handle byte order differences -> convert to host byte ordering. */
- {
- int i;
- for (i = 0; i < CODESTREAM_BUFSIZ; i++)
- codestream_buf[i] =
- extract_unsigned_integer (&codestream_buf[i],
- sizeof (codestream_buf[i]));
- }
-
- if (peek_flag)
- return codestream_peek ();
- else
- return codestream_get ();
-}
-
-static void
-codestream_seek (CORE_ADDR place)
-{
- codestream_next_addr = place / CODESTREAM_BUFSIZ;
- codestream_next_addr *= CODESTREAM_BUFSIZ;
- codestream_cnt = 0;
- codestream_fill (1);
- while (codestream_tell () != place)
- codestream_get ();
-}
-
-/* This function is currently unused but leave in for now. */
-
-static void
-codestream_read (unsigned int *buf, int count)
-{
- unsigned int *p;
- int i;
- p = buf;
- for (i = 0; i < count; i++)
- *p++ = codestream_get ();
-}
-\f
-/* Set up prologue scanning and return the first insn. */
-
-static unsigned int
-setup_prologue_scan (CORE_ADDR pc)
-{
- unsigned int insn;
-
- codestream_seek (pc);
- insn = codestream_get ();
-
- return insn;
-}
-
-/*
- * Find & return amount a local space allocated, and advance codestream to
- * first register push (if any).
- * If entry sequence doesn't make sense, return -1, and leave
- * codestream pointer random.
- */
-
-static long
-arc_get_frame_setup (CORE_ADDR pc)
-{
- unsigned int insn;
- /* Size of frame or -1 if unrecognizable prologue. */
- int frame_size = -1;
- /* An initial "sub sp,sp,N" may or may not be for a stdarg fn. */
- int maybe_stdarg_decr = -1;
-
- insn = setup_prologue_scan (pc);
-
- /* The authority for what appears here is the home-grown ABI.
- The most recent version is 1.2. */
-
- /* First insn may be "sub sp,sp,N" if stdarg fn. */
- if ((insn & BUILD_INSN (-1, -1, -1, -1, 0))
- == BUILD_INSN (10, SP_REGNUM, SP_REGNUM, SHIMM_REGNUM, 0))
- {
- maybe_stdarg_decr = X_D (insn);
- insn = codestream_get ();
- }
-
- if ((insn & BUILD_INSN (-1, 0, -1, -1, -1)) /* st blink,[sp,4] */
- == BUILD_INSN (2, 0, SP_REGNUM, BLINK_REGNUM, 4))
- {
- insn = codestream_get ();
- /* Frame may not be necessary, even though blink is saved.
- At least this is something we recognize. */
- frame_size = 0;
- }
-
- if ((insn & BUILD_INSN (-1, 0, -1, -1, -1)) /* st fp,[sp] */
- == BUILD_INSN (2, 0, SP_REGNUM, FP_REGNUM, 0))
- {
- insn = codestream_get ();
- if ((insn & BUILD_INSN (-1, -1, -1, -1, 0))
- != BUILD_INSN (12, FP_REGNUM, SP_REGNUM, SP_REGNUM, 0))
- return -1;
-
- /* Check for stack adjustment sub sp,sp,N. */
- insn = codestream_peek ();
- if ((insn & BUILD_INSN (-1, -1, -1, 0, 0))
- == BUILD_INSN (10, SP_REGNUM, SP_REGNUM, 0, 0))
- {
- if (LIMM_P (X_C (insn)))
- frame_size = codestream_get ();
- else if (SHIMM_P (X_C (insn)))
- frame_size = X_D (insn);
- else
- return -1;
- if (frame_size < 0)
- return -1;
-
- codestream_get ();
-
- /* This sequence is used to get the address of the return
- buffer for a function that returns a structure. */
- insn = codestream_peek ();
- if ((insn & OPMASK) == 0x60000000)
- codestream_get ();
- }
- /* Frameless fn. */
- else
- {
- frame_size = 0;
- }
- }
-
- /* If we found a "sub sp,sp,N" and nothing else, it may or may not be a
- stdarg fn. The stdarg decrement is not treated as part of the frame size,
- so we have a dilemma: what do we return? For now, if we get a
- "sub sp,sp,N" and nothing else assume this isn't a stdarg fn. One way
- to fix this completely would be to add a bit to the function descriptor
- that says the function is a stdarg function. */
-
- if (frame_size < 0 && maybe_stdarg_decr > 0)
- return maybe_stdarg_decr;
- return frame_size;
-}
-
-/* Given a pc value, skip it forward past the function prologue by
- disassembling instructions that appear to be a prologue.
-
- If FRAMELESS_P is set, we are only testing to see if the function
- is frameless. If it is a frameless function, return PC unchanged.
- This allows a quicker answer. */
-
-CORE_ADDR
-arc_skip_prologue (CORE_ADDR pc, int frameless_p)
-{
- unsigned int insn;
- int i, frame_size;
-
- if ((frame_size = arc_get_frame_setup (pc)) < 0)
- return (pc);
-
- if (frameless_p)
- return frame_size == 0 ? pc : codestream_tell ();
-
- /* Skip over register saves. */
- for (i = 0; i < 8; i++)
- {
- insn = codestream_peek ();
- if ((insn & BUILD_INSN (-1, 0, -1, 0, 0))
- != BUILD_INSN (2, 0, SP_REGNUM, 0, 0))
- break; /* not st insn */
- if (!ARC_CALL_SAVED_REG (X_C (insn)))
- break;
- codestream_get ();
- }
-
- return codestream_tell ();
-}
-
-/* Is the prologue at PC frameless? */
-
-int
-arc_prologue_frameless_p (CORE_ADDR pc)
-{
- return (pc == arc_skip_prologue (pc, 1));
-}
-
-/* Return the return address for a frame.
- This is used to implement FRAME_SAVED_PC.
- This is taken from frameless_look_for_prologue. */
-
-CORE_ADDR
-arc_frame_saved_pc (struct frame_info *frame)
-{
- CORE_ADDR func_start;
- unsigned int insn;
-
- func_start = get_pc_function_start (frame->pc) + FUNCTION_START_OFFSET;
- if (func_start == 0)
- {
- /* Best guess. */
- return ARC_PC_TO_REAL_ADDRESS (read_memory_integer (FRAME_FP (frame) + 4, 4));
- }
-
- /* The authority for what appears here is the home-grown ABI.
- The most recent version is 1.2. */
-
- insn = setup_prologue_scan (func_start);
-
- /* First insn may be "sub sp,sp,N" if stdarg fn. */
- if ((insn & BUILD_INSN (-1, -1, -1, -1, 0))
- == BUILD_INSN (10, SP_REGNUM, SP_REGNUM, SHIMM_REGNUM, 0))
- insn = codestream_get ();
-
- /* If the next insn is "st blink,[sp,4]" we can get blink from there.
- Otherwise this is a leaf function and we can use blink. Note that
- this still allows for the case where a leaf function saves/clobbers/
- restores blink. */
-
- if ((insn & BUILD_INSN (-1, 0, -1, -1, -1)) /* st blink,[sp,4] */
- != BUILD_INSN (2, 0, SP_REGNUM, BLINK_REGNUM, 4))
- return ARC_PC_TO_REAL_ADDRESS (read_register (BLINK_REGNUM));
- else
- return ARC_PC_TO_REAL_ADDRESS (read_memory_integer (FRAME_FP (frame) + 4, 4));
-}
-
-/*
- * Parse the first few instructions of the function to see
- * what registers were stored.
- *
- * The startup sequence can be at the start of the function.
- * 'st blink,[sp+4], st fp,[sp], mov fp,sp'
- *
- * Local space is allocated just below by sub sp,sp,nnn.
- * Next, the registers used by this function are stored (as offsets from sp).
- */
-
-void
-frame_find_saved_regs (struct frame_info *fip, struct frame_saved_regs *fsrp)
-{
- long locals;
- unsigned int insn;
- CORE_ADDR dummy_bottom;
- CORE_ADDR adr;
- int i, regnum, offset;
-
- memset (fsrp, 0, sizeof *fsrp);
-
- /* If frame is the end of a dummy, compute where the beginning would be. */
- dummy_bottom = fip->frame - 4 - REGISTER_BYTES - CALL_DUMMY_LENGTH;
-
- /* Check if the PC is in the stack, in a dummy frame. */
- if (dummy_bottom <= fip->pc && fip->pc <= fip->frame)
- {
- /* all regs were saved by push_call_dummy () */
- adr = fip->frame;
- for (i = 0; i < NUM_REGS; i++)
- {
- adr -= REGISTER_RAW_SIZE (i);
- fsrp->regs[i] = adr;
- }
- return;
- }
-
- locals = arc_get_frame_setup (get_pc_function_start (fip->pc));
-
- if (locals >= 0)
- {
- /* Set `adr' to the value of `sp'. */
- adr = fip->frame - locals;
- for (i = 0; i < 8; i++)
- {
- insn = codestream_get ();
- if ((insn & BUILD_INSN (-1, 0, -1, 0, 0))
- != BUILD_INSN (2, 0, SP_REGNUM, 0, 0))
- break;
- regnum = X_C (insn);
- offset = X_D (insn);
- fsrp->regs[regnum] = adr + offset;
- }
- }
-
- fsrp->regs[PC_REGNUM] = fip->frame + 4;
- fsrp->regs[FP_REGNUM] = fip->frame;
-}
-
-void
-arc_push_dummy_frame (void)
-{
- CORE_ADDR sp = read_register (SP_REGNUM);
- int regnum;
- char regbuf[MAX_REGISTER_RAW_SIZE];
-
- read_register_gen (PC_REGNUM, regbuf);
- write_memory (sp + 4, regbuf, REGISTER_SIZE);
- read_register_gen (FP_REGNUM, regbuf);
- write_memory (sp, regbuf, REGISTER_SIZE);
- write_register (FP_REGNUM, sp);
- for (regnum = 0; regnum < NUM_REGS; regnum++)
- {
- read_register_gen (regnum, regbuf);
- sp = push_bytes (sp, regbuf, REGISTER_RAW_SIZE (regnum));
- }
- sp += (2 * REGISTER_SIZE);
- write_register (SP_REGNUM, sp);
-}
-
-void
-arc_pop_frame (void)
-{
- struct frame_info *frame = get_current_frame ();
- CORE_ADDR fp;
- int regnum;
- struct frame_saved_regs fsr;
- char regbuf[MAX_REGISTER_RAW_SIZE];
-
- fp = FRAME_FP (frame);
- get_frame_saved_regs (frame, &fsr);
- for (regnum = 0; regnum < NUM_REGS; regnum++)
- {
- CORE_ADDR adr;
- adr = fsr.regs[regnum];
- if (adr)
- {
- read_memory (adr, regbuf, REGISTER_RAW_SIZE (regnum));
- write_register_bytes (REGISTER_BYTE (regnum), regbuf,
- REGISTER_RAW_SIZE (regnum));
- }
- }
- write_register (FP_REGNUM, read_memory_integer (fp, 4));
- write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));
- write_register (SP_REGNUM, fp + 8);
- flush_cached_frames ();
-}
-\f
-/* Simulate single-step. */
-
-typedef enum
-{
- NORMAL4, /* a normal 4 byte insn */
- NORMAL8, /* a normal 8 byte insn */
- BRANCH4, /* a 4 byte branch insn, including ones without delay slots */
- BRANCH8, /* an 8 byte branch insn, including ones with delay slots */
-}
-insn_type;
-
-/* Return the type of INSN and store in TARGET the destination address of a
- branch if this is one. */
-/* ??? Need to verify all cases are properly handled. */
-
-static insn_type
-get_insn_type (unsigned long insn, CORE_ADDR pc, CORE_ADDR *target)
-{
- unsigned long limm;
-
- switch (insn >> 27)
- {
- case 0:
- case 1:
- case 2: /* load/store insns */
- if (LIMM_P (X_A (insn))
- || LIMM_P (X_B (insn))
- || LIMM_P (X_C (insn)))
- return NORMAL8;
- return NORMAL4;
- case 4:
- case 5:
- case 6: /* branch insns */
- *target = pc + 4 + X_L (insn);
- /* ??? It isn't clear that this is always the right answer.
- The problem occurs when the next insn is an 8 byte insn. If the
- branch is conditional there's no worry as there shouldn't be an 8
- byte insn following. The programmer may be cheating if s/he knows
- the branch will never be taken, but we don't deal with that.
- Note that the programmer is also allowed to play games by putting
- an insn with long immediate data in the delay slot and then duplicate
- the long immediate data at the branch target. Ugh! */
- if (X_N (insn) == 0)
- return BRANCH4;
- return BRANCH8;
- case 7: /* jump insns */
- if (LIMM_P (X_B (insn)))
- {
- limm = read_memory_integer (pc + 4, 4);
- *target = ARC_PC_TO_REAL_ADDRESS (limm);
- return BRANCH8;
- }
- if (SHIMM_P (X_B (insn)))
- *target = ARC_PC_TO_REAL_ADDRESS (X_D (insn));
- else
- *target = ARC_PC_TO_REAL_ADDRESS (read_register (X_B (insn)));
- if (X_Q (insn) == 0 && X_N (insn) == 0)
- return BRANCH4;
- return BRANCH8;
- default: /* arithmetic insns, etc. */
- if (LIMM_P (X_A (insn))
- || LIMM_P (X_B (insn))
- || LIMM_P (X_C (insn)))
- return NORMAL8;
- return NORMAL4;
- }
-}
-
-/* single_step() is called just before we want to resume the inferior, if we
- want to single-step it but there is no hardware or kernel single-step
- support. We find all the possible targets of the coming instruction and
- breakpoint them.
-
- single_step is also called just after the inferior stops. If we had
- set up a simulated single-step, we undo our damage. */
-
-void
-arc_software_single_step (enum target_signal ignore, /* sig but we don't need it */
- int insert_breakpoints_p)
-{
- static CORE_ADDR next_pc, target;
- static int brktrg_p;
- typedef char binsn_quantum[BREAKPOINT_MAX];
- static binsn_quantum break_mem[2];
-
- if (insert_breakpoints_p)
- {
- insn_type type;
- CORE_ADDR pc;
- unsigned long insn;
-
- pc = read_register (PC_REGNUM);
- insn = read_memory_integer (pc, 4);
- type = get_insn_type (insn, pc, &target);
-
- /* Always set a breakpoint for the insn after the branch. */
- next_pc = pc + ((type == NORMAL8 || type == BRANCH8) ? 8 : 4);
- target_insert_breakpoint (next_pc, break_mem[0]);
-
- brktrg_p = 0;
-
- if ((type == BRANCH4 || type == BRANCH8)
- /* Watch out for branches to the following location.
- We just stored a breakpoint there and another call to
- target_insert_breakpoint will think the real insn is the
- breakpoint we just stored there. */
- && target != next_pc)
- {
- brktrg_p = 1;
- target_insert_breakpoint (target, break_mem[1]);
- }
-
- }
- else
- {
- /* Remove breakpoints. */
- target_remove_breakpoint (next_pc, break_mem[0]);
-
- if (brktrg_p)
- target_remove_breakpoint (target, break_mem[1]);
-
- /* Fix the pc. */
- stop_pc -= DECR_PC_AFTER_BREAK;
- write_pc (stop_pc);
- }
-}
-\f
-/* Because of Multi-arch, GET_LONGJMP_TARGET is always defined. So test
- for a definition of JB_PC. */
-#ifdef JB_PC
-/* Figure out where the longjmp will land. Slurp the args out of the stack.
- We expect the first arg to be a pointer to the jmp_buf structure from which
- we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
- This routine returns true on success. */
-
-int
-get_longjmp_target (CORE_ADDR *pc)
-{
- char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
- CORE_ADDR sp, jb_addr;
-
- sp = read_register (SP_REGNUM);
-
- if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */
- buf,
- TARGET_PTR_BIT / TARGET_CHAR_BIT))
- return 0;
-
- jb_addr = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
-
- if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
- TARGET_PTR_BIT / TARGET_CHAR_BIT))
- return 0;
-
- *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
-
- return 1;
-}
-#endif /* GET_LONGJMP_TARGET */
-\f
-/* Disassemble one instruction. */
-
-static int
-arc_print_insn (bfd_vma vma, disassemble_info *info)
-{
- static int current_mach;
- static int current_endian;
- static disassembler_ftype current_disasm;
-
- if (current_disasm == NULL
- || arc_bfd_mach_type != current_mach
- || TARGET_BYTE_ORDER != current_endian)
- {
- current_mach = arc_bfd_mach_type;
- current_endian = TARGET_BYTE_ORDER;
- current_disasm = arc_get_disassembler (NULL);
- }
-
- return (*current_disasm) (vma, info);
-}
-\f
-/* Command to set cpu type. */
-
-void
-arc_set_cpu_type_command (char *args, int from_tty)
-{
- int i;
-
- if (tmp_arc_cpu_type == NULL || *tmp_arc_cpu_type == '\0')
- {
- printf_unfiltered ("The known ARC cpu types are as follows:\n");
- for (i = 0; arc_cpu_type_table[i].name != NULL; ++i)
- printf_unfiltered ("%s\n", arc_cpu_type_table[i].name);
-
- /* Restore the value. */
- tmp_arc_cpu_type = xstrdup (arc_cpu_type);
-
- return;
- }
-
- if (!arc_set_cpu_type (tmp_arc_cpu_type))
- {
- error ("Unknown cpu type `%s'.", tmp_arc_cpu_type);
- /* Restore its value. */
- tmp_arc_cpu_type = xstrdup (arc_cpu_type);
- }
-}
-
-static void
-arc_show_cpu_type_command (char *args, int from_tty)
-{
-}
-
-/* Modify the actual cpu type.
- Result is a boolean indicating success. */
-
-static int
-arc_set_cpu_type (char *str)
-{
- int i, j;
-
- if (str == NULL)
- return 0;
-
- for (i = 0; arc_cpu_type_table[i].name != NULL; ++i)
- {
- if (strcasecmp (str, arc_cpu_type_table[i].name) == 0)
- {
- arc_cpu_type = str;
- arc_bfd_mach_type = arc_cpu_type_table[i].value;
- return 1;
- }
- }
-
- return 0;
-}
-\f
-void
-_initialize_arc_tdep (void)
-{
- struct cmd_list_element *c;
-
- c = add_set_cmd ("cpu", class_support, var_string_noescape,
- (char *) &tmp_arc_cpu_type,
- "Set the type of ARC cpu in use.\n\
-This command has two purposes. In a multi-cpu system it lets one\n\
-change the cpu being debugged. It also gives one access to\n\
-cpu-type-specific registers and recognize cpu-type-specific instructions.\
-",
- &setlist);
- set_cmd_cfunc (c, arc_set_cpu_type_command);
- c = add_show_from_set (c, &showlist);
- set_cmd_cfunc (c, arc_show_cpu_type_command);
-
- /* We have to use xstrdup() here because the `set' command frees it
- before setting a new value. */
- tmp_arc_cpu_type = xstrdup (DEFAULT_ARC_CPU_TYPE);
- arc_set_cpu_type (tmp_arc_cpu_type);
-
- c = add_set_cmd ("displaypipeline", class_support, var_zinteger,
- (char *) &display_pipeline_p,
- "Set pipeline display (simulator only).\n\
-When enabled, the state of the pipeline after each cycle is displayed.",
- &setlist);
- c = add_show_from_set (c, &showlist);
-
- c = add_set_cmd ("debugpipeline", class_support, var_zinteger,
- (char *) &debug_pipeline_p,
- "Set pipeline debug display (simulator only).\n\
-When enabled, debugging information about the pipeline is displayed.",
- &setlist);
- c = add_show_from_set (c, &showlist);
-
- c = add_set_cmd ("cputimer", class_support, var_zinteger,
- (char *) &cpu_timer,
- "Set maximum cycle count (simulator only).\n\
-Control will return to gdb if the timer expires.\n\
-A negative value disables the timer.",
- &setlist);
- c = add_show_from_set (c, &showlist);
-
- tm_print_insn = arc_print_insn;
-}
+// OBSOLETE /* ARC target-dependent stuff.
+// OBSOLETE Copyright 1995, 1996, 1999, 2000, 2001 Free Software Foundation, Inc.
+// OBSOLETE
+// OBSOLETE This file is part of GDB.
+// OBSOLETE
+// OBSOLETE This program is free software; you can redistribute it and/or modify
+// OBSOLETE it under the terms of the GNU General Public License as published by
+// OBSOLETE the Free Software Foundation; either version 2 of the License, or
+// OBSOLETE (at your option) any later version.
+// OBSOLETE
+// OBSOLETE This program is distributed in the hope that it will be useful,
+// OBSOLETE but WITHOUT ANY WARRANTY; without even the implied warranty of
+// OBSOLETE MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// OBSOLETE GNU General Public License for more details.
+// OBSOLETE
+// OBSOLETE You should have received a copy of the GNU General Public License
+// OBSOLETE along with this program; if not, write to the Free Software
+// OBSOLETE Foundation, Inc., 59 Temple Place - Suite 330,
+// OBSOLETE Boston, MA 02111-1307, USA. */
+// OBSOLETE
+// OBSOLETE #include "defs.h"
+// OBSOLETE #include "frame.h"
+// OBSOLETE #include "inferior.h"
+// OBSOLETE #include "gdbcore.h"
+// OBSOLETE #include "target.h"
+// OBSOLETE #include "floatformat.h"
+// OBSOLETE #include "symtab.h"
+// OBSOLETE #include "gdbcmd.h"
+// OBSOLETE #include "regcache.h"
+// OBSOLETE #include "gdb_string.h"
+// OBSOLETE
+// OBSOLETE /* Local functions */
+// OBSOLETE
+// OBSOLETE static int arc_set_cpu_type (char *str);
+// OBSOLETE
+// OBSOLETE /* Current CPU, set with the "set cpu" command. */
+// OBSOLETE static int arc_bfd_mach_type;
+// OBSOLETE char *arc_cpu_type;
+// OBSOLETE char *tmp_arc_cpu_type;
+// OBSOLETE
+// OBSOLETE /* Table of cpu names. */
+// OBSOLETE struct
+// OBSOLETE {
+// OBSOLETE char *name;
+// OBSOLETE int value;
+// OBSOLETE }
+// OBSOLETE arc_cpu_type_table[] =
+// OBSOLETE {
+// OBSOLETE { "arc5", bfd_mach_arc_5 },
+// OBSOLETE { "arc6", bfd_mach_arc_6 },
+// OBSOLETE { "arc7", bfd_mach_arc_7 },
+// OBSOLETE { "arc8", bfd_mach_arc_8 },
+// OBSOLETE { NULL, 0 }
+// OBSOLETE };
+// OBSOLETE
+// OBSOLETE /* Used by simulator. */
+// OBSOLETE int display_pipeline_p;
+// OBSOLETE int cpu_timer;
+// OBSOLETE /* This one must have the same type as used in the emulator.
+// OBSOLETE It's currently an enum so this should be ok for now. */
+// OBSOLETE int debug_pipeline_p;
+// OBSOLETE
+// OBSOLETE #define ARC_CALL_SAVED_REG(r) ((r) >= 16 && (r) < 24)
+// OBSOLETE
+// OBSOLETE #define OPMASK 0xf8000000
+// OBSOLETE
+// OBSOLETE /* Instruction field accessor macros.
+// OBSOLETE See the Programmer's Reference Manual. */
+// OBSOLETE #define X_OP(i) (((i) >> 27) & 0x1f)
+// OBSOLETE #define X_A(i) (((i) >> 21) & 0x3f)
+// OBSOLETE #define X_B(i) (((i) >> 15) & 0x3f)
+// OBSOLETE #define X_C(i) (((i) >> 9) & 0x3f)
+// OBSOLETE #define X_D(i) ((((i) & 0x1ff) ^ 0x100) - 0x100)
+// OBSOLETE #define X_L(i) (((((i) >> 5) & 0x3ffffc) ^ 0x200000) - 0x200000)
+// OBSOLETE #define X_N(i) (((i) >> 5) & 3)
+// OBSOLETE #define X_Q(i) ((i) & 0x1f)
+// OBSOLETE
+// OBSOLETE /* Return non-zero if X is a short immediate data indicator. */
+// OBSOLETE #define SHIMM_P(x) ((x) == 61 || (x) == 63)
+// OBSOLETE
+// OBSOLETE /* Return non-zero if X is a "long" (32 bit) immediate data indicator. */
+// OBSOLETE #define LIMM_P(x) ((x) == 62)
+// OBSOLETE
+// OBSOLETE /* Build a simple instruction. */
+// OBSOLETE #define BUILD_INSN(op, a, b, c, d) \
+// OBSOLETE ((((op) & 31) << 27) \
+// OBSOLETE | (((a) & 63) << 21) \
+// OBSOLETE | (((b) & 63) << 15) \
+// OBSOLETE | (((c) & 63) << 9) \
+// OBSOLETE | ((d) & 511))
+// OBSOLETE \f
+// OBSOLETE /* Codestream stuff. */
+// OBSOLETE static void codestream_read (unsigned int *, int);
+// OBSOLETE static void codestream_seek (CORE_ADDR);
+// OBSOLETE static unsigned int codestream_fill (int);
+// OBSOLETE
+// OBSOLETE #define CODESTREAM_BUFSIZ 16
+// OBSOLETE static CORE_ADDR codestream_next_addr;
+// OBSOLETE static CORE_ADDR codestream_addr;
+// OBSOLETE /* FIXME assumes sizeof (int) == 32? */
+// OBSOLETE static unsigned int codestream_buf[CODESTREAM_BUFSIZ];
+// OBSOLETE static int codestream_off;
+// OBSOLETE static int codestream_cnt;
+// OBSOLETE
+// OBSOLETE #define codestream_tell() \
+// OBSOLETE (codestream_addr + codestream_off * sizeof (codestream_buf[0]))
+// OBSOLETE #define codestream_peek() \
+// OBSOLETE (codestream_cnt == 0 \
+// OBSOLETE ? codestream_fill (1) \
+// OBSOLETE : codestream_buf[codestream_off])
+// OBSOLETE #define codestream_get() \
+// OBSOLETE (codestream_cnt-- == 0 \
+// OBSOLETE ? codestream_fill (0) \
+// OBSOLETE : codestream_buf[codestream_off++])
+// OBSOLETE
+// OBSOLETE static unsigned int
+// OBSOLETE codestream_fill (int peek_flag)
+// OBSOLETE {
+// OBSOLETE codestream_addr = codestream_next_addr;
+// OBSOLETE codestream_next_addr += CODESTREAM_BUFSIZ * sizeof (codestream_buf[0]);
+// OBSOLETE codestream_off = 0;
+// OBSOLETE codestream_cnt = CODESTREAM_BUFSIZ;
+// OBSOLETE read_memory (codestream_addr, (char *) codestream_buf,
+// OBSOLETE CODESTREAM_BUFSIZ * sizeof (codestream_buf[0]));
+// OBSOLETE /* FIXME: check return code? */
+// OBSOLETE
+// OBSOLETE
+// OBSOLETE /* Handle byte order differences -> convert to host byte ordering. */
+// OBSOLETE {
+// OBSOLETE int i;
+// OBSOLETE for (i = 0; i < CODESTREAM_BUFSIZ; i++)
+// OBSOLETE codestream_buf[i] =
+// OBSOLETE extract_unsigned_integer (&codestream_buf[i],
+// OBSOLETE sizeof (codestream_buf[i]));
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE if (peek_flag)
+// OBSOLETE return codestream_peek ();
+// OBSOLETE else
+// OBSOLETE return codestream_get ();
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE static void
+// OBSOLETE codestream_seek (CORE_ADDR place)
+// OBSOLETE {
+// OBSOLETE codestream_next_addr = place / CODESTREAM_BUFSIZ;
+// OBSOLETE codestream_next_addr *= CODESTREAM_BUFSIZ;
+// OBSOLETE codestream_cnt = 0;
+// OBSOLETE codestream_fill (1);
+// OBSOLETE while (codestream_tell () != place)
+// OBSOLETE codestream_get ();
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* This function is currently unused but leave in for now. */
+// OBSOLETE
+// OBSOLETE static void
+// OBSOLETE codestream_read (unsigned int *buf, int count)
+// OBSOLETE {
+// OBSOLETE unsigned int *p;
+// OBSOLETE int i;
+// OBSOLETE p = buf;
+// OBSOLETE for (i = 0; i < count; i++)
+// OBSOLETE *p++ = codestream_get ();
+// OBSOLETE }
+// OBSOLETE \f
+// OBSOLETE /* Set up prologue scanning and return the first insn. */
+// OBSOLETE
+// OBSOLETE static unsigned int
+// OBSOLETE setup_prologue_scan (CORE_ADDR pc)
+// OBSOLETE {
+// OBSOLETE unsigned int insn;
+// OBSOLETE
+// OBSOLETE codestream_seek (pc);
+// OBSOLETE insn = codestream_get ();
+// OBSOLETE
+// OBSOLETE return insn;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /*
+// OBSOLETE * Find & return amount a local space allocated, and advance codestream to
+// OBSOLETE * first register push (if any).
+// OBSOLETE * If entry sequence doesn't make sense, return -1, and leave
+// OBSOLETE * codestream pointer random.
+// OBSOLETE */
+// OBSOLETE
+// OBSOLETE static long
+// OBSOLETE arc_get_frame_setup (CORE_ADDR pc)
+// OBSOLETE {
+// OBSOLETE unsigned int insn;
+// OBSOLETE /* Size of frame or -1 if unrecognizable prologue. */
+// OBSOLETE int frame_size = -1;
+// OBSOLETE /* An initial "sub sp,sp,N" may or may not be for a stdarg fn. */
+// OBSOLETE int maybe_stdarg_decr = -1;
+// OBSOLETE
+// OBSOLETE insn = setup_prologue_scan (pc);
+// OBSOLETE
+// OBSOLETE /* The authority for what appears here is the home-grown ABI.
+// OBSOLETE The most recent version is 1.2. */
+// OBSOLETE
+// OBSOLETE /* First insn may be "sub sp,sp,N" if stdarg fn. */
+// OBSOLETE if ((insn & BUILD_INSN (-1, -1, -1, -1, 0))
+// OBSOLETE == BUILD_INSN (10, SP_REGNUM, SP_REGNUM, SHIMM_REGNUM, 0))
+// OBSOLETE {
+// OBSOLETE maybe_stdarg_decr = X_D (insn);
+// OBSOLETE insn = codestream_get ();
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE if ((insn & BUILD_INSN (-1, 0, -1, -1, -1)) /* st blink,[sp,4] */
+// OBSOLETE == BUILD_INSN (2, 0, SP_REGNUM, BLINK_REGNUM, 4))
+// OBSOLETE {
+// OBSOLETE insn = codestream_get ();
+// OBSOLETE /* Frame may not be necessary, even though blink is saved.
+// OBSOLETE At least this is something we recognize. */
+// OBSOLETE frame_size = 0;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE if ((insn & BUILD_INSN (-1, 0, -1, -1, -1)) /* st fp,[sp] */
+// OBSOLETE == BUILD_INSN (2, 0, SP_REGNUM, FP_REGNUM, 0))
+// OBSOLETE {
+// OBSOLETE insn = codestream_get ();
+// OBSOLETE if ((insn & BUILD_INSN (-1, -1, -1, -1, 0))
+// OBSOLETE != BUILD_INSN (12, FP_REGNUM, SP_REGNUM, SP_REGNUM, 0))
+// OBSOLETE return -1;
+// OBSOLETE
+// OBSOLETE /* Check for stack adjustment sub sp,sp,N. */
+// OBSOLETE insn = codestream_peek ();
+// OBSOLETE if ((insn & BUILD_INSN (-1, -1, -1, 0, 0))
+// OBSOLETE == BUILD_INSN (10, SP_REGNUM, SP_REGNUM, 0, 0))
+// OBSOLETE {
+// OBSOLETE if (LIMM_P (X_C (insn)))
+// OBSOLETE frame_size = codestream_get ();
+// OBSOLETE else if (SHIMM_P (X_C (insn)))
+// OBSOLETE frame_size = X_D (insn);
+// OBSOLETE else
+// OBSOLETE return -1;
+// OBSOLETE if (frame_size < 0)
+// OBSOLETE return -1;
+// OBSOLETE
+// OBSOLETE codestream_get ();
+// OBSOLETE
+// OBSOLETE /* This sequence is used to get the address of the return
+// OBSOLETE buffer for a function that returns a structure. */
+// OBSOLETE insn = codestream_peek ();
+// OBSOLETE if ((insn & OPMASK) == 0x60000000)
+// OBSOLETE codestream_get ();
+// OBSOLETE }
+// OBSOLETE /* Frameless fn. */
+// OBSOLETE else
+// OBSOLETE {
+// OBSOLETE frame_size = 0;
+// OBSOLETE }
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* If we found a "sub sp,sp,N" and nothing else, it may or may not be a
+// OBSOLETE stdarg fn. The stdarg decrement is not treated as part of the frame size,
+// OBSOLETE so we have a dilemma: what do we return? For now, if we get a
+// OBSOLETE "sub sp,sp,N" and nothing else assume this isn't a stdarg fn. One way
+// OBSOLETE to fix this completely would be to add a bit to the function descriptor
+// OBSOLETE that says the function is a stdarg function. */
+// OBSOLETE
+// OBSOLETE if (frame_size < 0 && maybe_stdarg_decr > 0)
+// OBSOLETE return maybe_stdarg_decr;
+// OBSOLETE return frame_size;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* Given a pc value, skip it forward past the function prologue by
+// OBSOLETE disassembling instructions that appear to be a prologue.
+// OBSOLETE
+// OBSOLETE If FRAMELESS_P is set, we are only testing to see if the function
+// OBSOLETE is frameless. If it is a frameless function, return PC unchanged.
+// OBSOLETE This allows a quicker answer. */
+// OBSOLETE
+// OBSOLETE CORE_ADDR
+// OBSOLETE arc_skip_prologue (CORE_ADDR pc, int frameless_p)
+// OBSOLETE {
+// OBSOLETE unsigned int insn;
+// OBSOLETE int i, frame_size;
+// OBSOLETE
+// OBSOLETE if ((frame_size = arc_get_frame_setup (pc)) < 0)
+// OBSOLETE return (pc);
+// OBSOLETE
+// OBSOLETE if (frameless_p)
+// OBSOLETE return frame_size == 0 ? pc : codestream_tell ();
+// OBSOLETE
+// OBSOLETE /* Skip over register saves. */
+// OBSOLETE for (i = 0; i < 8; i++)
+// OBSOLETE {
+// OBSOLETE insn = codestream_peek ();
+// OBSOLETE if ((insn & BUILD_INSN (-1, 0, -1, 0, 0))
+// OBSOLETE != BUILD_INSN (2, 0, SP_REGNUM, 0, 0))
+// OBSOLETE break; /* not st insn */
+// OBSOLETE if (!ARC_CALL_SAVED_REG (X_C (insn)))
+// OBSOLETE break;
+// OBSOLETE codestream_get ();
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE return codestream_tell ();
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* Is the prologue at PC frameless? */
+// OBSOLETE
+// OBSOLETE int
+// OBSOLETE arc_prologue_frameless_p (CORE_ADDR pc)
+// OBSOLETE {
+// OBSOLETE return (pc == arc_skip_prologue (pc, 1));
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* Return the return address for a frame.
+// OBSOLETE This is used to implement FRAME_SAVED_PC.
+// OBSOLETE This is taken from frameless_look_for_prologue. */
+// OBSOLETE
+// OBSOLETE CORE_ADDR
+// OBSOLETE arc_frame_saved_pc (struct frame_info *frame)
+// OBSOLETE {
+// OBSOLETE CORE_ADDR func_start;
+// OBSOLETE unsigned int insn;
+// OBSOLETE
+// OBSOLETE func_start = get_pc_function_start (frame->pc) + FUNCTION_START_OFFSET;
+// OBSOLETE if (func_start == 0)
+// OBSOLETE {
+// OBSOLETE /* Best guess. */
+// OBSOLETE return ARC_PC_TO_REAL_ADDRESS (read_memory_integer (FRAME_FP (frame) + 4, 4));
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* The authority for what appears here is the home-grown ABI.
+// OBSOLETE The most recent version is 1.2. */
+// OBSOLETE
+// OBSOLETE insn = setup_prologue_scan (func_start);
+// OBSOLETE
+// OBSOLETE /* First insn may be "sub sp,sp,N" if stdarg fn. */
+// OBSOLETE if ((insn & BUILD_INSN (-1, -1, -1, -1, 0))
+// OBSOLETE == BUILD_INSN (10, SP_REGNUM, SP_REGNUM, SHIMM_REGNUM, 0))
+// OBSOLETE insn = codestream_get ();
+// OBSOLETE
+// OBSOLETE /* If the next insn is "st blink,[sp,4]" we can get blink from there.
+// OBSOLETE Otherwise this is a leaf function and we can use blink. Note that
+// OBSOLETE this still allows for the case where a leaf function saves/clobbers/
+// OBSOLETE restores blink. */
+// OBSOLETE
+// OBSOLETE if ((insn & BUILD_INSN (-1, 0, -1, -1, -1)) /* st blink,[sp,4] */
+// OBSOLETE != BUILD_INSN (2, 0, SP_REGNUM, BLINK_REGNUM, 4))
+// OBSOLETE return ARC_PC_TO_REAL_ADDRESS (read_register (BLINK_REGNUM));
+// OBSOLETE else
+// OBSOLETE return ARC_PC_TO_REAL_ADDRESS (read_memory_integer (FRAME_FP (frame) + 4, 4));
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /*
+// OBSOLETE * Parse the first few instructions of the function to see
+// OBSOLETE * what registers were stored.
+// OBSOLETE *
+// OBSOLETE * The startup sequence can be at the start of the function.
+// OBSOLETE * 'st blink,[sp+4], st fp,[sp], mov fp,sp'
+// OBSOLETE *
+// OBSOLETE * Local space is allocated just below by sub sp,sp,nnn.
+// OBSOLETE * Next, the registers used by this function are stored (as offsets from sp).
+// OBSOLETE */
+// OBSOLETE
+// OBSOLETE void
+// OBSOLETE frame_find_saved_regs (struct frame_info *fip, struct frame_saved_regs *fsrp)
+// OBSOLETE {
+// OBSOLETE long locals;
+// OBSOLETE unsigned int insn;
+// OBSOLETE CORE_ADDR dummy_bottom;
+// OBSOLETE CORE_ADDR adr;
+// OBSOLETE int i, regnum, offset;
+// OBSOLETE
+// OBSOLETE memset (fsrp, 0, sizeof *fsrp);
+// OBSOLETE
+// OBSOLETE /* If frame is the end of a dummy, compute where the beginning would be. */
+// OBSOLETE dummy_bottom = fip->frame - 4 - REGISTER_BYTES - CALL_DUMMY_LENGTH;
+// OBSOLETE
+// OBSOLETE /* Check if the PC is in the stack, in a dummy frame. */
+// OBSOLETE if (dummy_bottom <= fip->pc && fip->pc <= fip->frame)
+// OBSOLETE {
+// OBSOLETE /* all regs were saved by push_call_dummy () */
+// OBSOLETE adr = fip->frame;
+// OBSOLETE for (i = 0; i < NUM_REGS; i++)
+// OBSOLETE {
+// OBSOLETE adr -= REGISTER_RAW_SIZE (i);
+// OBSOLETE fsrp->regs[i] = adr;
+// OBSOLETE }
+// OBSOLETE return;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE locals = arc_get_frame_setup (get_pc_function_start (fip->pc));
+// OBSOLETE
+// OBSOLETE if (locals >= 0)
+// OBSOLETE {
+// OBSOLETE /* Set `adr' to the value of `sp'. */
+// OBSOLETE adr = fip->frame - locals;
+// OBSOLETE for (i = 0; i < 8; i++)
+// OBSOLETE {
+// OBSOLETE insn = codestream_get ();
+// OBSOLETE if ((insn & BUILD_INSN (-1, 0, -1, 0, 0))
+// OBSOLETE != BUILD_INSN (2, 0, SP_REGNUM, 0, 0))
+// OBSOLETE break;
+// OBSOLETE regnum = X_C (insn);
+// OBSOLETE offset = X_D (insn);
+// OBSOLETE fsrp->regs[regnum] = adr + offset;
+// OBSOLETE }
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE fsrp->regs[PC_REGNUM] = fip->frame + 4;
+// OBSOLETE fsrp->regs[FP_REGNUM] = fip->frame;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE void
+// OBSOLETE arc_push_dummy_frame (void)
+// OBSOLETE {
+// OBSOLETE CORE_ADDR sp = read_register (SP_REGNUM);
+// OBSOLETE int regnum;
+// OBSOLETE char regbuf[MAX_REGISTER_RAW_SIZE];
+// OBSOLETE
+// OBSOLETE read_register_gen (PC_REGNUM, regbuf);
+// OBSOLETE write_memory (sp + 4, regbuf, REGISTER_SIZE);
+// OBSOLETE read_register_gen (FP_REGNUM, regbuf);
+// OBSOLETE write_memory (sp, regbuf, REGISTER_SIZE);
+// OBSOLETE write_register (FP_REGNUM, sp);
+// OBSOLETE for (regnum = 0; regnum < NUM_REGS; regnum++)
+// OBSOLETE {
+// OBSOLETE read_register_gen (regnum, regbuf);
+// OBSOLETE sp = push_bytes (sp, regbuf, REGISTER_RAW_SIZE (regnum));
+// OBSOLETE }
+// OBSOLETE sp += (2 * REGISTER_SIZE);
+// OBSOLETE write_register (SP_REGNUM, sp);
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE void
+// OBSOLETE arc_pop_frame (void)
+// OBSOLETE {
+// OBSOLETE struct frame_info *frame = get_current_frame ();
+// OBSOLETE CORE_ADDR fp;
+// OBSOLETE int regnum;
+// OBSOLETE struct frame_saved_regs fsr;
+// OBSOLETE char regbuf[MAX_REGISTER_RAW_SIZE];
+// OBSOLETE
+// OBSOLETE fp = FRAME_FP (frame);
+// OBSOLETE get_frame_saved_regs (frame, &fsr);
+// OBSOLETE for (regnum = 0; regnum < NUM_REGS; regnum++)
+// OBSOLETE {
+// OBSOLETE CORE_ADDR adr;
+// OBSOLETE adr = fsr.regs[regnum];
+// OBSOLETE if (adr)
+// OBSOLETE {
+// OBSOLETE read_memory (adr, regbuf, REGISTER_RAW_SIZE (regnum));
+// OBSOLETE write_register_bytes (REGISTER_BYTE (regnum), regbuf,
+// OBSOLETE REGISTER_RAW_SIZE (regnum));
+// OBSOLETE }
+// OBSOLETE }
+// OBSOLETE write_register (FP_REGNUM, read_memory_integer (fp, 4));
+// OBSOLETE write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));
+// OBSOLETE write_register (SP_REGNUM, fp + 8);
+// OBSOLETE flush_cached_frames ();
+// OBSOLETE }
+// OBSOLETE \f
+// OBSOLETE /* Simulate single-step. */
+// OBSOLETE
+// OBSOLETE typedef enum
+// OBSOLETE {
+// OBSOLETE NORMAL4, /* a normal 4 byte insn */
+// OBSOLETE NORMAL8, /* a normal 8 byte insn */
+// OBSOLETE BRANCH4, /* a 4 byte branch insn, including ones without delay slots */
+// OBSOLETE BRANCH8, /* an 8 byte branch insn, including ones with delay slots */
+// OBSOLETE }
+// OBSOLETE insn_type;
+// OBSOLETE
+// OBSOLETE /* Return the type of INSN and store in TARGET the destination address of a
+// OBSOLETE branch if this is one. */
+// OBSOLETE /* ??? Need to verify all cases are properly handled. */
+// OBSOLETE
+// OBSOLETE static insn_type
+// OBSOLETE get_insn_type (unsigned long insn, CORE_ADDR pc, CORE_ADDR *target)
+// OBSOLETE {
+// OBSOLETE unsigned long limm;
+// OBSOLETE
+// OBSOLETE switch (insn >> 27)
+// OBSOLETE {
+// OBSOLETE case 0:
+// OBSOLETE case 1:
+// OBSOLETE case 2: /* load/store insns */
+// OBSOLETE if (LIMM_P (X_A (insn))
+// OBSOLETE || LIMM_P (X_B (insn))
+// OBSOLETE || LIMM_P (X_C (insn)))
+// OBSOLETE return NORMAL8;
+// OBSOLETE return NORMAL4;
+// OBSOLETE case 4:
+// OBSOLETE case 5:
+// OBSOLETE case 6: /* branch insns */
+// OBSOLETE *target = pc + 4 + X_L (insn);
+// OBSOLETE /* ??? It isn't clear that this is always the right answer.
+// OBSOLETE The problem occurs when the next insn is an 8 byte insn. If the
+// OBSOLETE branch is conditional there's no worry as there shouldn't be an 8
+// OBSOLETE byte insn following. The programmer may be cheating if s/he knows
+// OBSOLETE the branch will never be taken, but we don't deal with that.
+// OBSOLETE Note that the programmer is also allowed to play games by putting
+// OBSOLETE an insn with long immediate data in the delay slot and then duplicate
+// OBSOLETE the long immediate data at the branch target. Ugh! */
+// OBSOLETE if (X_N (insn) == 0)
+// OBSOLETE return BRANCH4;
+// OBSOLETE return BRANCH8;
+// OBSOLETE case 7: /* jump insns */
+// OBSOLETE if (LIMM_P (X_B (insn)))
+// OBSOLETE {
+// OBSOLETE limm = read_memory_integer (pc + 4, 4);
+// OBSOLETE *target = ARC_PC_TO_REAL_ADDRESS (limm);
+// OBSOLETE return BRANCH8;
+// OBSOLETE }
+// OBSOLETE if (SHIMM_P (X_B (insn)))
+// OBSOLETE *target = ARC_PC_TO_REAL_ADDRESS (X_D (insn));
+// OBSOLETE else
+// OBSOLETE *target = ARC_PC_TO_REAL_ADDRESS (read_register (X_B (insn)));
+// OBSOLETE if (X_Q (insn) == 0 && X_N (insn) == 0)
+// OBSOLETE return BRANCH4;
+// OBSOLETE return BRANCH8;
+// OBSOLETE default: /* arithmetic insns, etc. */
+// OBSOLETE if (LIMM_P (X_A (insn))
+// OBSOLETE || LIMM_P (X_B (insn))
+// OBSOLETE || LIMM_P (X_C (insn)))
+// OBSOLETE return NORMAL8;
+// OBSOLETE return NORMAL4;
+// OBSOLETE }
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* single_step() is called just before we want to resume the inferior, if we
+// OBSOLETE want to single-step it but there is no hardware or kernel single-step
+// OBSOLETE support. We find all the possible targets of the coming instruction and
+// OBSOLETE breakpoint them.
+// OBSOLETE
+// OBSOLETE single_step is also called just after the inferior stops. If we had
+// OBSOLETE set up a simulated single-step, we undo our damage. */
+// OBSOLETE
+// OBSOLETE void
+// OBSOLETE arc_software_single_step (enum target_signal ignore, /* sig but we don't need it */
+// OBSOLETE int insert_breakpoints_p)
+// OBSOLETE {
+// OBSOLETE static CORE_ADDR next_pc, target;
+// OBSOLETE static int brktrg_p;
+// OBSOLETE typedef char binsn_quantum[BREAKPOINT_MAX];
+// OBSOLETE static binsn_quantum break_mem[2];
+// OBSOLETE
+// OBSOLETE if (insert_breakpoints_p)
+// OBSOLETE {
+// OBSOLETE insn_type type;
+// OBSOLETE CORE_ADDR pc;
+// OBSOLETE unsigned long insn;
+// OBSOLETE
+// OBSOLETE pc = read_register (PC_REGNUM);
+// OBSOLETE insn = read_memory_integer (pc, 4);
+// OBSOLETE type = get_insn_type (insn, pc, &target);
+// OBSOLETE
+// OBSOLETE /* Always set a breakpoint for the insn after the branch. */
+// OBSOLETE next_pc = pc + ((type == NORMAL8 || type == BRANCH8) ? 8 : 4);
+// OBSOLETE target_insert_breakpoint (next_pc, break_mem[0]);
+// OBSOLETE
+// OBSOLETE brktrg_p = 0;
+// OBSOLETE
+// OBSOLETE if ((type == BRANCH4 || type == BRANCH8)
+// OBSOLETE /* Watch out for branches to the following location.
+// OBSOLETE We just stored a breakpoint there and another call to
+// OBSOLETE target_insert_breakpoint will think the real insn is the
+// OBSOLETE breakpoint we just stored there. */
+// OBSOLETE && target != next_pc)
+// OBSOLETE {
+// OBSOLETE brktrg_p = 1;
+// OBSOLETE target_insert_breakpoint (target, break_mem[1]);
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE }
+// OBSOLETE else
+// OBSOLETE {
+// OBSOLETE /* Remove breakpoints. */
+// OBSOLETE target_remove_breakpoint (next_pc, break_mem[0]);
+// OBSOLETE
+// OBSOLETE if (brktrg_p)
+// OBSOLETE target_remove_breakpoint (target, break_mem[1]);
+// OBSOLETE
+// OBSOLETE /* Fix the pc. */
+// OBSOLETE stop_pc -= DECR_PC_AFTER_BREAK;
+// OBSOLETE write_pc (stop_pc);
+// OBSOLETE }
+// OBSOLETE }
+// OBSOLETE \f
+// OBSOLETE /* Because of Multi-arch, GET_LONGJMP_TARGET is always defined. So test
+// OBSOLETE for a definition of JB_PC. */
+// OBSOLETE #ifdef JB_PC
+// OBSOLETE /* Figure out where the longjmp will land. Slurp the args out of the stack.
+// OBSOLETE We expect the first arg to be a pointer to the jmp_buf structure from which
+// OBSOLETE we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
+// OBSOLETE This routine returns true on success. */
+// OBSOLETE
+// OBSOLETE int
+// OBSOLETE get_longjmp_target (CORE_ADDR *pc)
+// OBSOLETE {
+// OBSOLETE char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
+// OBSOLETE CORE_ADDR sp, jb_addr;
+// OBSOLETE
+// OBSOLETE sp = read_register (SP_REGNUM);
+// OBSOLETE
+// OBSOLETE if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */
+// OBSOLETE buf,
+// OBSOLETE TARGET_PTR_BIT / TARGET_CHAR_BIT))
+// OBSOLETE return 0;
+// OBSOLETE
+// OBSOLETE jb_addr = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
+// OBSOLETE
+// OBSOLETE if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
+// OBSOLETE TARGET_PTR_BIT / TARGET_CHAR_BIT))
+// OBSOLETE return 0;
+// OBSOLETE
+// OBSOLETE *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
+// OBSOLETE
+// OBSOLETE return 1;
+// OBSOLETE }
+// OBSOLETE #endif /* GET_LONGJMP_TARGET */
+// OBSOLETE \f
+// OBSOLETE /* Disassemble one instruction. */
+// OBSOLETE
+// OBSOLETE static int
+// OBSOLETE arc_print_insn (bfd_vma vma, disassemble_info *info)
+// OBSOLETE {
+// OBSOLETE static int current_mach;
+// OBSOLETE static int current_endian;
+// OBSOLETE static disassembler_ftype current_disasm;
+// OBSOLETE
+// OBSOLETE if (current_disasm == NULL
+// OBSOLETE || arc_bfd_mach_type != current_mach
+// OBSOLETE || TARGET_BYTE_ORDER != current_endian)
+// OBSOLETE {
+// OBSOLETE current_mach = arc_bfd_mach_type;
+// OBSOLETE current_endian = TARGET_BYTE_ORDER;
+// OBSOLETE current_disasm = arc_get_disassembler (NULL);
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE return (*current_disasm) (vma, info);
+// OBSOLETE }
+// OBSOLETE \f
+// OBSOLETE /* Command to set cpu type. */
+// OBSOLETE
+// OBSOLETE void
+// OBSOLETE arc_set_cpu_type_command (char *args, int from_tty)
+// OBSOLETE {
+// OBSOLETE int i;
+// OBSOLETE
+// OBSOLETE if (tmp_arc_cpu_type == NULL || *tmp_arc_cpu_type == '\0')
+// OBSOLETE {
+// OBSOLETE printf_unfiltered ("The known ARC cpu types are as follows:\n");
+// OBSOLETE for (i = 0; arc_cpu_type_table[i].name != NULL; ++i)
+// OBSOLETE printf_unfiltered ("%s\n", arc_cpu_type_table[i].name);
+// OBSOLETE
+// OBSOLETE /* Restore the value. */
+// OBSOLETE tmp_arc_cpu_type = xstrdup (arc_cpu_type);
+// OBSOLETE
+// OBSOLETE return;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE if (!arc_set_cpu_type (tmp_arc_cpu_type))
+// OBSOLETE {
+// OBSOLETE error ("Unknown cpu type `%s'.", tmp_arc_cpu_type);
+// OBSOLETE /* Restore its value. */
+// OBSOLETE tmp_arc_cpu_type = xstrdup (arc_cpu_type);
+// OBSOLETE }
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE static void
+// OBSOLETE arc_show_cpu_type_command (char *args, int from_tty)
+// OBSOLETE {
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* Modify the actual cpu type.
+// OBSOLETE Result is a boolean indicating success. */
+// OBSOLETE
+// OBSOLETE static int
+// OBSOLETE arc_set_cpu_type (char *str)
+// OBSOLETE {
+// OBSOLETE int i, j;
+// OBSOLETE
+// OBSOLETE if (str == NULL)
+// OBSOLETE return 0;
+// OBSOLETE
+// OBSOLETE for (i = 0; arc_cpu_type_table[i].name != NULL; ++i)
+// OBSOLETE {
+// OBSOLETE if (strcasecmp (str, arc_cpu_type_table[i].name) == 0)
+// OBSOLETE {
+// OBSOLETE arc_cpu_type = str;
+// OBSOLETE arc_bfd_mach_type = arc_cpu_type_table[i].value;
+// OBSOLETE return 1;
+// OBSOLETE }
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE return 0;
+// OBSOLETE }
+// OBSOLETE \f
+// OBSOLETE void
+// OBSOLETE _initialize_arc_tdep (void)
+// OBSOLETE {
+// OBSOLETE struct cmd_list_element *c;
+// OBSOLETE
+// OBSOLETE c = add_set_cmd ("cpu", class_support, var_string_noescape,
+// OBSOLETE (char *) &tmp_arc_cpu_type,
+// OBSOLETE "Set the type of ARC cpu in use.\n\
+// OBSOLETE This command has two purposes. In a multi-cpu system it lets one\n\
+// OBSOLETE change the cpu being debugged. It also gives one access to\n\
+// OBSOLETE cpu-type-specific registers and recognize cpu-type-specific instructions.\
+// OBSOLETE ",
+// OBSOLETE &setlist);
+// OBSOLETE set_cmd_cfunc (c, arc_set_cpu_type_command);
+// OBSOLETE c = add_show_from_set (c, &showlist);
+// OBSOLETE set_cmd_cfunc (c, arc_show_cpu_type_command);
+// OBSOLETE
+// OBSOLETE /* We have to use xstrdup() here because the `set' command frees it
+// OBSOLETE before setting a new value. */
+// OBSOLETE tmp_arc_cpu_type = xstrdup (DEFAULT_ARC_CPU_TYPE);
+// OBSOLETE arc_set_cpu_type (tmp_arc_cpu_type);
+// OBSOLETE
+// OBSOLETE c = add_set_cmd ("displaypipeline", class_support, var_zinteger,
+// OBSOLETE (char *) &display_pipeline_p,
+// OBSOLETE "Set pipeline display (simulator only).\n\
+// OBSOLETE When enabled, the state of the pipeline after each cycle is displayed.",
+// OBSOLETE &setlist);
+// OBSOLETE c = add_show_from_set (c, &showlist);
+// OBSOLETE
+// OBSOLETE c = add_set_cmd ("debugpipeline", class_support, var_zinteger,
+// OBSOLETE (char *) &debug_pipeline_p,
+// OBSOLETE "Set pipeline debug display (simulator only).\n\
+// OBSOLETE When enabled, debugging information about the pipeline is displayed.",
+// OBSOLETE &setlist);
+// OBSOLETE c = add_show_from_set (c, &showlist);
+// OBSOLETE
+// OBSOLETE c = add_set_cmd ("cputimer", class_support, var_zinteger,
+// OBSOLETE (char *) &cpu_timer,
+// OBSOLETE "Set maximum cycle count (simulator only).\n\
+// OBSOLETE Control will return to gdb if the timer expires.\n\
+// OBSOLETE A negative value disables the timer.",
+// OBSOLETE &setlist);
+// OBSOLETE c = add_show_from_set (c, &showlist);
+// OBSOLETE
+// OBSOLETE tm_print_insn = arc_print_insn;
+// OBSOLETE }
projects / deliverable / binutils-gdb.git / blobdiff