| // 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 |
| // 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 |
| // 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 |
| // 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 |
| // 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 |
| // 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 |
| // 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 |
| // 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 } |
