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Diffstat (limited to 'gdb/d30v-tdep.c')
| -rw-r--r-- | gdb/d30v-tdep.c | 1396 |
1 files changed, 0 insertions, 1396 deletions
diff --git a/gdb/d30v-tdep.c b/gdb/d30v-tdep.c deleted file mode 100644 index ec46463..0000000 --- a/gdb/d30v-tdep.c +++ /dev/null @@ -1,1396 +0,0 @@ -/* Target-dependent code for Mitsubishi D30V, for GDB. - Copyright (C) 1996, 1997 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. */ - -/* Contributed by Martin Hunt, hunt@cygnus.com */ - -#include "defs.h" -#include "frame.h" -#include "obstack.h" -#include "symtab.h" -#include "gdbtypes.h" -#include "gdbcmd.h" -#include "gdbcore.h" -#include "gdb_string.h" -#include "value.h" -#include "inferior.h" -#include "dis-asm.h" -#include "symfile.h" -#include "objfiles.h" - -void d30v_frame_find_saved_regs PARAMS ((struct frame_info *fi, - struct frame_saved_regs *fsr)); -void d30v_frame_find_saved_regs_offsets PARAMS ((struct frame_info *fi, - struct frame_saved_regs *fsr)); -static void d30v_pop_dummy_frame PARAMS ((struct frame_info *fi)); -static void d30v_print_flags PARAMS ((void)); -static void print_flags_command PARAMS ((char *, int)); - -/* the following defines assume: - fp is r61, lr is r62, sp is r63, and ?? is r22 - if that changes, they will need to be updated */ - -#define OP_MASK_ALL_BUT_RA 0x0ffc0fff /* throw away Ra, keep the rest */ - -#define OP_STW_SPM 0x054c0fc0 /* stw Ra, @(sp-) */ -#define OP_STW_SP_R0 0x05400fc0 /* stw Ra, @(sp,r0) */ -#define OP_STW_SP_IMM0 0x05480fc0 /* st Ra, @(sp, 0x0) */ -#define OP_STW_R22P_R0 0x05440580 /* stw Ra, @(r22+,r0) */ - -#define OP_ST2W_SPM 0x056c0fc0 /* st2w Ra, @(sp-) */ -#define OP_ST2W_SP_R0 0x05600fc0 /* st2w Ra, @(sp, r0) */ -#define OP_ST2W_SP_IMM0 0x05680fc0 /* st2w Ra, @(sp, 0x0) */ -#define OP_ST2W_R22P_R0 0x05640580 /* st2w Ra, @(r22+, r0) */ - -#define OP_MASK_OPCODE 0x0ffc0000 /* just the opcode, ign operands */ -#define OP_NOP 0x00f00000 /* nop */ - -#define OP_MASK_ALL_BUT_IMM 0x0fffffc0 /* throw away imm, keep the rest */ -#define OP_SUB_SP_IMM 0x082bffc0 /* sub sp,sp,imm */ -#define OP_ADD_SP_IMM 0x080bffc0 /* add sp,sp,imm */ -#define OP_ADD_R22_SP_IMM 0x08096fc0 /* add r22,sp,imm */ -#define OP_STW_FP_SP_IMM 0x054bdfc0 /* stw fp,@(sp,imm) */ -#define OP_OR_SP_R0_IMM 0x03abf000 /* or sp,r0,imm */ - -/* no mask */ -#define OP_OR_FP_R0_SP 0x03a3d03f /* or fp,r0,sp */ -#define OP_OR_FP_SP_R0 0x03a3dfc0 /* or fp,sp,r0 */ -#define OP_OR_FP_IMM0_SP 0x03abd03f /* or fp,0x0,sp */ -#define OP_STW_FP_R22P_R0 0x0547d580 /* stw fp,@(r22+,r0) */ -#define OP_STW_LR_R22P_R0 0x0547e580 /* stw lr,@(r22+,r0) */ - -#define OP_MASK_OP_AND_RB 0x0ff80fc0 /* keep op and rb,throw away rest */ -#define OP_STW_SP_IMM 0x05480fc0 /* stw Ra,@(sp,imm) */ -#define OP_ST2W_SP_IMM 0x05680fc0 /* st2w Ra,@(sp,imm) */ -#define OP_STW_FP_IMM 0x05480f40 /* stw Ra,@(fp,imm) */ -#define OP_STW_FP_R0 0x05400f40 /* stw Ra,@(fp,r0) */ - -#define OP_MASK_FM_BIT 0x80000000 -#define OP_MASK_CC_BITS 0x70000000 -#define OP_MASK_SUB_INST 0x0fffffff - -#define EXTRACT_RA(op) (((op) >> 12) & 0x3f) -#define EXTRACT_RB(op) (((op) >> 6) & 0x3f) -#define EXTRACT_RC(op) (((op) & 0x3f) -#define EXTRACT_UIMM6(op) ((op) & 0x3f) -#define EXTRACT_IMM6(op) ((((int)EXTRACT_UIMM6(op)) << 26) >> 26) -#define EXTRACT_IMM26(op) ((((op)&0x0ff00000) >> 2) | ((op)&0x0003ffff)) -#define EXTRACT_IMM32(opl, opr) ((EXTRACT_UIMM6(opl) << 26)|EXTRACT_IMM26(opr)) - - -int -d30v_frame_chain_valid (chain, fi) - CORE_ADDR chain; - struct frame_info *fi; /* not used here */ -{ -#if 0 - return ((chain) != 0 && (fi) != 0 && (fi)->return_pc != 0); -#else - return ((chain) != 0 && (fi) != 0 && (fi)->frame <= chain); -#endif -} - -/* Discard from the stack the innermost frame, restoring all saved - registers. */ - -void -d30v_pop_frame () -{ - struct frame_info *frame = get_current_frame (); - CORE_ADDR fp; - int regnum; - struct frame_saved_regs fsr; - char raw_buffer[8]; - - fp = FRAME_FP (frame); - if (frame->dummy) - { - d30v_pop_dummy_frame(frame); - return; - } - - /* fill out fsr with the address of where each */ - /* register was stored in the frame */ - get_frame_saved_regs (frame, &fsr); - - /* now update the current registers with the old values */ - for (regnum = A0_REGNUM; regnum < A0_REGNUM+2 ; regnum++) - { - if (fsr.regs[regnum]) - { - read_memory (fsr.regs[regnum], raw_buffer, 8); - write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 8); - } - } - for (regnum = 0; regnum < SP_REGNUM; regnum++) - { - if (fsr.regs[regnum]) - { - write_register (regnum, read_memory_unsigned_integer (fsr.regs[regnum], 4)); - } - } - if (fsr.regs[PSW_REGNUM]) - { - write_register (PSW_REGNUM, read_memory_unsigned_integer (fsr.regs[PSW_REGNUM], 4)); - } - - write_register (PC_REGNUM, read_register(LR_REGNUM)); - write_register (SP_REGNUM, fp + frame->size); - target_store_registers (-1); - flush_cached_frames (); -} - -static int -check_prologue (op) - unsigned long op; -{ - /* add sp,sp,imm -- observed */ - if ((op & OP_MASK_ALL_BUT_IMM) == OP_ADD_SP_IMM) - return 1; - - /* add r22,sp,imm -- observed */ - if ((op & OP_MASK_ALL_BUT_IMM) == OP_ADD_R22_SP_IMM) - return 1; - - /* or fp,r0,sp -- observed */ - if (op == OP_OR_FP_R0_SP) - return 1; - - /* nop */ - if ((op & OP_MASK_OPCODE) == OP_NOP) - return 1; - - /* stw Ra,@(sp,r0) */ - if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SP_R0) - return 1; - - /* stw Ra,@(sp,0x0) */ - if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SP_IMM0) - return 1; - - /* st2w Ra,@(sp,r0) */ - if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SP_R0) - return 1; - - /* st2w Ra,@(sp,0x0) */ - if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SP_IMM0) - return 1; - - /* stw fp, @(r22+,r0) -- observed */ - if (op == OP_STW_FP_R22P_R0) - return 1; - - /* stw r62, @(r22+,r0) -- observed */ - if (op == OP_STW_LR_R22P_R0) - return 1; - - /* stw Ra, @(fp,r0) -- observed */ - if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_FP_R0) - return 1; /* first arg */ - - /* stw Ra, @(fp,imm) -- observed */ - if ((op & OP_MASK_OP_AND_RB) == OP_STW_FP_IMM) - return 1; /* second and subsequent args */ - - /* stw fp,@(sp,imm) -- observed */ - if ((op & OP_MASK_ALL_BUT_IMM) == OP_STW_FP_SP_IMM) - return 1; - - /* st2w Ra,@(r22+,r0) */ - if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_R22P_R0) - return 1; - - /* stw Ra, @(sp-) */ - if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SPM) - return 1; - - /* st2w Ra, @(sp-) */ - if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SPM) - return 1; - - /* sub.? sp,sp,imm */ - if ((op & OP_MASK_ALL_BUT_IMM) == OP_SUB_SP_IMM) - return 1; - - return 0; -} - -CORE_ADDR -d30v_skip_prologue (pc) - CORE_ADDR pc; -{ - unsigned long op[2]; - unsigned long opl, opr; /* left / right sub operations */ - unsigned long fm0, fm1; /* left / right mode bits */ - unsigned long cc0, cc1; - unsigned long op1, op2; - CORE_ADDR func_addr, func_end; - struct symtab_and_line sal; - - /* If we have line debugging information, then the end of the */ - /* prologue should the first assembly instruction of the first source line */ - if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) - { - sal = find_pc_line (func_addr, 0); - if ( sal.end && sal.end < func_end) - return sal.end; - } - - if (target_read_memory (pc, (char *)&op[0], 8)) - return pc; /* Can't access it -- assume no prologue. */ - - while (1) - { - opl = (unsigned long)read_memory_integer (pc, 4); - opr = (unsigned long)read_memory_integer (pc+4, 4); - - fm0 = (opl & OP_MASK_FM_BIT); - fm1 = (opr & OP_MASK_FM_BIT); - - cc0 = (opl & OP_MASK_CC_BITS); - cc1 = (opr & OP_MASK_CC_BITS); - - opl = (opl & OP_MASK_SUB_INST); - opr = (opr & OP_MASK_SUB_INST); - - if (fm0 && fm1) - { - /* long instruction (opl contains the opcode) */ - if (((opl & OP_MASK_ALL_BUT_IMM) != OP_ADD_SP_IMM) && /* add sp,sp,imm */ - ((opl & OP_MASK_ALL_BUT_IMM) != OP_ADD_R22_SP_IMM) && /* add r22,sp,imm */ - ((opl & OP_MASK_OP_AND_RB) != OP_STW_SP_IMM) && /* stw Ra, @(sp,imm) */ - ((opl & OP_MASK_OP_AND_RB) != OP_ST2W_SP_IMM)) /* st2w Ra, @(sp,imm) */ - break; - } - else - { - /* short instructions */ - if (fm0 && !fm1) - { - op1 = opr; - op2 = opl; - } - else - { - op1 = opl; - op2 = opr; - } - if (check_prologue(op1)) - { - if (!check_prologue(op2)) - { - /* if the previous opcode was really part of the prologue */ - /* and not just a NOP, then we want to break after both instructions */ - if ((op1 & OP_MASK_OPCODE) != OP_NOP) - pc += 8; - break; - } - } - else - break; - } - pc += 8; - } - return pc; -} - -static int end_of_stack; - -/* Given a GDB frame, determine the address of the calling function's frame. - This will be used to create a new GDB frame struct, and then - INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame. -*/ - -CORE_ADDR -d30v_frame_chain (frame) - struct frame_info *frame; -{ - struct frame_saved_regs fsr; - - d30v_frame_find_saved_regs (frame, &fsr); - - if (end_of_stack) - return (CORE_ADDR)0; - - if (frame->return_pc == IMEM_START) - return (CORE_ADDR)0; - - if (!fsr.regs[FP_REGNUM]) - { - if (!fsr.regs[SP_REGNUM] || fsr.regs[SP_REGNUM] == STACK_START) - return (CORE_ADDR)0; - - return fsr.regs[SP_REGNUM]; - } - - if (!read_memory_unsigned_integer(fsr.regs[FP_REGNUM],4)) - return (CORE_ADDR)0; - - return read_memory_unsigned_integer(fsr.regs[FP_REGNUM],4); -} - -static int next_addr, uses_frame; -static int frame_size; - -static int -prologue_find_regs (op, fsr, addr) - unsigned long op; - struct frame_saved_regs *fsr; - CORE_ADDR addr; -{ - int n; - int offset; - - /* add sp,sp,imm -- observed */ - if ((op & OP_MASK_ALL_BUT_IMM) == OP_ADD_SP_IMM) - { - offset = EXTRACT_IMM6(op); - /*next_addr += offset;*/ - frame_size += -offset; - return 1; - } - - /* add r22,sp,imm -- observed */ - if ((op & OP_MASK_ALL_BUT_IMM) == OP_ADD_R22_SP_IMM) - { - offset = EXTRACT_IMM6(op); - next_addr = (offset - frame_size); - return 1; - } - - /* stw Ra, @(fp, offset) -- observed */ - if ((op & OP_MASK_OP_AND_RB) == OP_STW_FP_IMM) - { - n = EXTRACT_RA(op); - offset = EXTRACT_IMM6(op); - fsr->regs[n] = (offset - frame_size); - return 1; - } - - /* stw Ra, @(fp, r0) -- observed */ - if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_FP_R0) - { - n = EXTRACT_RA(op); - fsr->regs[n] = (- frame_size); - return 1; - } - - /* or fp,0,sp -- observed */ - if ((op == OP_OR_FP_R0_SP) || - (op == OP_OR_FP_SP_R0) || - (op == OP_OR_FP_IMM0_SP)) - { - uses_frame = 1; - return 1; - } - - /* nop */ - if ((op & OP_MASK_OPCODE) == OP_NOP) - return 1; - - /* stw Ra,@(r22+,r0) -- observed */ - if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_R22P_R0) - { - n = EXTRACT_RA(op); - fsr->regs[n] = next_addr; - next_addr += 4; - return 1; - } -#if 0 /* subsumed in pattern above */ - /* stw fp,@(r22+,r0) -- observed */ - if (op == OP_STW_FP_R22P_R0) - { - fsr->regs[FP_REGNUM] = next_addr; /* XXX */ - next_addr += 4; - return 1; - } - - /* stw r62,@(r22+,r0) -- observed */ - if (op == OP_STW_LR_R22P_R0) - { - fsr->regs[LR_REGNUM] = next_addr; - next_addr += 4; - return 1; - } -#endif - /* st2w Ra,@(r22+,r0) -- observed */ - if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_R22P_R0) - { - n = EXTRACT_RA(op); - fsr->regs[n] = next_addr; - fsr->regs[n+1] = next_addr + 4; - next_addr += 8; - return 1; - } - - /* stw rn, @(sp-) */ - if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SPM) - { - n = EXTRACT_RA(op); - fsr->regs[n] = next_addr; - next_addr -= 4; - return 1; - } - - /* st2w Ra, @(sp-) */ - else if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SPM) - { - n = EXTRACT_RA(op); - fsr->regs[n] = next_addr; - fsr->regs[n+1] = next_addr+4; - next_addr -= 8; - return 1; - } - - /* sub sp,sp,imm */ - if ((op & OP_MASK_ALL_BUT_IMM) == OP_SUB_SP_IMM) - { - offset = EXTRACT_IMM6(op); - frame_size += -offset; - return 1; - } - - /* st rn, @(sp,0) -- observed */ - if (((op & OP_MASK_ALL_BUT_RA) == OP_STW_SP_R0) || - ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SP_IMM0)) - { - n = EXTRACT_RA(op); - fsr->regs[n] = (- frame_size); - return 1; - } - - /* st2w rn, @(sp,0) */ - if (((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SP_R0) || - ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SP_IMM0)) - { - n = EXTRACT_RA(op); - fsr->regs[n] = (- frame_size); - fsr->regs[n+1] = (- frame_size) + 4; - return 1; - } - - /* stw fp,@(sp,imm) -- observed */ - if ((op & OP_MASK_ALL_BUT_IMM) == OP_STW_FP_SP_IMM) - { - offset = EXTRACT_IMM6(op); - fsr->regs[FP_REGNUM] = (offset - frame_size); - return 1; - } - return 0; -} - -/* Put here the code to store, into a struct frame_saved_regs, the - addresses of the saved registers of frame described by FRAME_INFO. - This includes special registers such as pc and fp saved in special - ways in the stack frame. sp is even more special: the address we - return for it IS the sp for the next frame. */ -void -d30v_frame_find_saved_regs (fi, fsr) - struct frame_info *fi; - struct frame_saved_regs *fsr; -{ - CORE_ADDR fp, pc; - unsigned long opl, opr; - unsigned long op1, op2; - unsigned long fm0, fm1; - int i; - - fp = fi->frame; - memset (fsr, 0, sizeof (*fsr)); - next_addr = 0; - frame_size = 0; - end_of_stack = 0; - - uses_frame = 0; - - d30v_frame_find_saved_regs_offsets (fi, fsr); - - fi->size = frame_size; - - if (!fp) - fp = read_register(SP_REGNUM); - - for (i=0; i<NUM_REGS-1; i++) - if (fsr->regs[i]) - { - fsr->regs[i] = fsr->regs[i] + fp + frame_size; - } - - if (fsr->regs[LR_REGNUM]) - fi->return_pc = read_memory_unsigned_integer(fsr->regs[LR_REGNUM],4); - else - fi->return_pc = read_register(LR_REGNUM); - - /* the SP is not normally (ever?) saved, but check anyway */ - if (!fsr->regs[SP_REGNUM]) - { - /* if the FP was saved, that means the current FP is valid, */ - /* otherwise, it isn't being used, so we use the SP instead */ - if (uses_frame) - fsr->regs[SP_REGNUM] = read_register(FP_REGNUM) + fi->size; - else - { - fsr->regs[SP_REGNUM] = fp + fi->size; - fi->frameless = 1; - fsr->regs[FP_REGNUM] = 0; - } - } -} - -void -d30v_frame_find_saved_regs_offsets (fi, fsr) - struct frame_info *fi; - struct frame_saved_regs *fsr; -{ - CORE_ADDR fp, pc; - unsigned long opl, opr; - unsigned long op1, op2; - unsigned long fm0, fm1; - int i; - - fp = fi->frame; - memset (fsr, 0, sizeof (*fsr)); - next_addr = 0; - frame_size = 0; - end_of_stack = 0; - - pc = get_pc_function_start (fi->pc); - - uses_frame = 0; - while (pc < fi->pc) - { - opl = (unsigned long)read_memory_integer (pc, 4); - opr = (unsigned long)read_memory_integer (pc+4, 4); - - fm0 = (opl & OP_MASK_FM_BIT); - fm1 = (opr & OP_MASK_FM_BIT); - - opl = (opl & OP_MASK_SUB_INST); - opr = (opr & OP_MASK_SUB_INST); - - if (fm0 && fm1) - { - /* long instruction */ - if ((opl & OP_MASK_ALL_BUT_IMM) == OP_ADD_SP_IMM) - { - /* add sp,sp,n */ - long offset = EXTRACT_IMM32(opl, opr); - frame_size += -offset; - } - else if ((opl & OP_MASK_ALL_BUT_IMM) == OP_ADD_R22_SP_IMM) - { - /* add r22,sp,offset */ - long offset = EXTRACT_IMM32(opl,opr); - next_addr = (offset - frame_size); - } - else if ((opl & OP_MASK_OP_AND_RB) == OP_STW_SP_IMM) - { - /* st Ra, @(sp,imm) */ - long offset = EXTRACT_IMM32(opl, opr); - short n = EXTRACT_RA(opl); - fsr->regs[n] = (offset - frame_size); - } - else if ((opl & OP_MASK_OP_AND_RB) == OP_ST2W_SP_IMM) - { - /* st2w Ra, @(sp,offset) */ - long offset = EXTRACT_IMM32(opl, opr); - short n = EXTRACT_RA(opl); - fsr->regs[n] = (offset - frame_size); - fsr->regs[n+1] = (offset - frame_size) + 4; - } - else if ((opl & OP_MASK_ALL_BUT_IMM) == OP_OR_SP_R0_IMM) - { - end_of_stack = 1; - } - else - break; - } - else - { - /* short instructions */ - if (fm0 && !fm1) - { - op2 = opl; - op1 = opr; - } - else - { - op1 = opl; - op2 = opr; - } - if (!prologue_find_regs(op1,fsr,pc) || !prologue_find_regs(op2,fsr,pc)) - break; - } - pc += 8; - } - -#if 0 - fi->size = frame_size; - - if (!fp) - fp = read_register(SP_REGNUM); - - for (i=0; i<NUM_REGS-1; i++) - if (fsr->regs[i]) - { - fsr->regs[i] = fsr->regs[i] + fp + frame_size; - } - - if (fsr->regs[LR_REGNUM]) - fi->return_pc = read_memory_unsigned_integer(fsr->regs[LR_REGNUM],4); - else - fi->return_pc = read_register(LR_REGNUM); - - /* the SP is not normally (ever?) saved, but check anyway */ - if (!fsr->regs[SP_REGNUM]) - { - /* if the FP was saved, that means the current FP is valid, */ - /* otherwise, it isn't being used, so we use the SP instead */ - if (uses_frame) - fsr->regs[SP_REGNUM] = read_register(FP_REGNUM) + fi->size; - else - { - fsr->regs[SP_REGNUM] = fp + fi->size; - fi->frameless = 1; - fsr->regs[FP_REGNUM] = 0; - } - } -#endif -} - -void -d30v_init_extra_frame_info (fromleaf, fi) - int fromleaf; - struct frame_info *fi; -{ - struct frame_saved_regs dummy; - - if (fi->next && (fi->pc == 0)) - fi->pc = fi->next->return_pc; - - d30v_frame_find_saved_regs_offsets (fi, &dummy); - - if (uses_frame == 0) - fi->frameless = 1; - else - fi->frameless = 0; - - if ((fi->next == 0) && (uses_frame == 0)) - /* innermost frame and it's "frameless", - so the fi->frame field is wrong, fix it! */ - fi->frame = read_sp (); - - if (dummy.regs[LR_REGNUM]) - { - /* it was saved, grab it! */ - dummy.regs[LR_REGNUM] += (fi->frame + frame_size); - fi->return_pc = read_memory_unsigned_integer(dummy.regs[LR_REGNUM],4); - } - else - fi->return_pc = read_register(LR_REGNUM); -} - -void -d30v_init_frame_pc (fromleaf, prev) - int fromleaf; - struct frame_info *prev; -{ - /* default value, put here so we can breakpoint on it and - see if the default value is really the right thing to use */ - prev->pc = (fromleaf ? SAVED_PC_AFTER_CALL (prev->next) : \ - prev->next ? FRAME_SAVED_PC (prev->next) : read_pc ()); -} - -static void d30v_print_register PARAMS ((int regnum, int tabular)); - -static void -d30v_print_register (regnum, tabular) - int regnum; - int tabular; -{ - if (regnum < A0_REGNUM) - { - if (tabular) - printf_filtered ("%08x", read_register (regnum)); - else - printf_filtered ("0x%x %d", read_register (regnum), - read_register (regnum)); - } - else - { - char regbuf[MAX_REGISTER_RAW_SIZE]; - - read_relative_register_raw_bytes (regnum, regbuf); - - val_print (REGISTER_VIRTUAL_TYPE (regnum), regbuf, 0, 0, - gdb_stdout, 'x', 1, 0, Val_pretty_default); - - if (!tabular) - { - printf_filtered (" "); - val_print (REGISTER_VIRTUAL_TYPE (regnum), regbuf, 0, 0, - gdb_stdout, 'd', 1, 0, Val_pretty_default); - } - } -} - -static void -d30v_print_flags () -{ - long psw = read_register (PSW_REGNUM); - printf_filtered ("flags #1"); - printf_filtered (" (sm) %d", (psw & PSW_SM) != 0); - printf_filtered (" (ea) %d", (psw & PSW_EA) != 0); - printf_filtered (" (db) %d", (psw & PSW_DB) != 0); - printf_filtered (" (ds) %d", (psw & PSW_DS) != 0); - printf_filtered (" (ie) %d", (psw & PSW_IE) != 0); - printf_filtered (" (rp) %d", (psw & PSW_RP) != 0); - printf_filtered (" (md) %d\n", (psw & PSW_MD) != 0); - - printf_filtered ("flags #2"); - printf_filtered (" (f0) %d", (psw & PSW_F0) != 0); - printf_filtered (" (f1) %d", (psw & PSW_F1) != 0); - printf_filtered (" (f2) %d", (psw & PSW_F2) != 0); - printf_filtered (" (f3) %d", (psw & PSW_F3) != 0); - printf_filtered (" (s) %d", (psw & PSW_S) != 0); - printf_filtered (" (v) %d", (psw & PSW_V) != 0); - printf_filtered (" (va) %d", (psw & PSW_VA) != 0); - printf_filtered (" (c) %d\n", (psw & PSW_C) != 0); -} - -static void -print_flags_command (args, from_tty) - char *args; - int from_tty; -{ - d30v_print_flags (); -} - -void -d30v_do_registers_info (regnum, fpregs) - int regnum; - int fpregs; -{ - long long num1, num2; - long psw; - - if (regnum != -1) - { - if (REGISTER_NAME (0) == NULL || REGISTER_NAME (0)[0] == '\000') - return; - - printf_filtered ("%s ", REGISTER_NAME (regnum)); - d30v_print_register (regnum, 0); - - printf_filtered ("\n"); - return; - } - - /* Have to print all the registers. Format them nicely. */ - - printf_filtered ("PC="); - print_address (read_pc (), gdb_stdout); - - printf_filtered (" PSW="); - d30v_print_register (PSW_REGNUM, 1); - - printf_filtered (" BPC="); - print_address (read_register (BPC_REGNUM), gdb_stdout); - - printf_filtered (" BPSW="); - d30v_print_register (BPSW_REGNUM, 1); - printf_filtered ("\n"); - - printf_filtered ("DPC="); - print_address (read_register (DPC_REGNUM), gdb_stdout); - - printf_filtered (" DPSW="); - d30v_print_register (DPSW_REGNUM, 1); - - printf_filtered (" IBA="); - print_address (read_register (IBA_REGNUM), gdb_stdout); - printf_filtered ("\n"); - - printf_filtered ("RPT_C="); - d30v_print_register (RPT_C_REGNUM, 1); - - printf_filtered (" RPT_S="); - print_address (read_register (RPT_S_REGNUM), gdb_stdout); - - printf_filtered (" RPT_E="); - print_address (read_register (RPT_E_REGNUM), gdb_stdout); - printf_filtered ("\n"); - - printf_filtered ("MOD_S="); - print_address (read_register (MOD_S_REGNUM), gdb_stdout); - - printf_filtered (" MOD_E="); - print_address (read_register (MOD_E_REGNUM), gdb_stdout); - printf_filtered ("\n"); - - printf_filtered ("EIT_VB="); - print_address (read_register (EIT_VB_REGNUM), gdb_stdout); - - printf_filtered (" INT_S="); - d30v_print_register (INT_S_REGNUM, 1); - - printf_filtered (" INT_M="); - d30v_print_register (INT_M_REGNUM, 1); - printf_filtered ("\n"); - - d30v_print_flags (); - for (regnum = 0; regnum <= 63;) - { - int i; - - printf_filtered ("R%d-R%d ", regnum, regnum + 7); - if (regnum < 10) - printf_filtered (" "); - if (regnum + 7 < 10) - printf_filtered (" "); - - for (i = 0; i < 8; i++) - { - printf_filtered (" "); - d30v_print_register (regnum++, 1); - } - - printf_filtered ("\n"); - } - - printf_filtered ("A0-A1 "); - - d30v_print_register (A0_REGNUM, 1); - printf_filtered (" "); - d30v_print_register (A1_REGNUM, 1); - printf_filtered ("\n"); -} - -CORE_ADDR -d30v_fix_call_dummy (dummyname, start_sp, fun, nargs, args, type, gcc_p) - char *dummyname; - CORE_ADDR start_sp; - CORE_ADDR fun; - int nargs; - value_ptr *args; - struct type *type; - int gcc_p; -{ - int regnum; - CORE_ADDR sp; - char buffer[MAX_REGISTER_RAW_SIZE]; - struct frame_info *frame = get_current_frame (); - frame->dummy = start_sp; - /*start_sp |= DMEM_START;*/ - - sp = start_sp; - for (regnum = 0; regnum < NUM_REGS; regnum++) - { - sp -= REGISTER_RAW_SIZE(regnum); - store_address (buffer, REGISTER_RAW_SIZE(regnum), read_register(regnum)); - write_memory (sp, buffer, REGISTER_RAW_SIZE(regnum)); - } - write_register (SP_REGNUM, (LONGEST)sp); - /* now we need to load LR with the return address */ - write_register (LR_REGNUM, (LONGEST)d30v_call_dummy_address()); - return sp; -} - -static void -d30v_pop_dummy_frame (fi) - struct frame_info *fi; -{ - CORE_ADDR sp = fi->dummy; - int regnum; - - for (regnum = 0; regnum < NUM_REGS; regnum++) - { - sp -= REGISTER_RAW_SIZE(regnum); - write_register(regnum, read_memory_unsigned_integer (sp, REGISTER_RAW_SIZE(regnum))); - } - flush_cached_frames (); /* needed? */ -} - - -CORE_ADDR -d30v_push_arguments (nargs, args, sp, struct_return, struct_addr) - int nargs; - value_ptr *args; - CORE_ADDR sp; - int struct_return; - CORE_ADDR struct_addr; -{ - int i, len, index=0, regnum=2; - char buffer[4], *contents; - LONGEST val; - CORE_ADDR ptrs[10]; - -#if 0 - /* Pass 1. Put all large args on stack */ - for (i = 0; i < nargs; i++) - { - value_ptr arg = args[i]; - struct type *arg_type = check_typedef (VALUE_TYPE (arg)); - len = TYPE_LENGTH (arg_type); - contents = VALUE_CONTENTS(arg); - val = extract_signed_integer (contents, len); - if (len > 4) - { - /* put on stack and pass pointers */ - sp -= len; - write_memory (sp, contents, len); - ptrs[index++] = sp; - } - } -#endif - index = 0; - - for (i = 0; i < nargs; i++) - { - value_ptr arg = args[i]; - struct type *arg_type = check_typedef (VALUE_TYPE (arg)); - len = TYPE_LENGTH (arg_type); - contents = VALUE_CONTENTS(arg); - if (len > 4) - { - /* we need multiple registers */ - int ndx; - - for (ndx = 0; len > 0; ndx += 8, len -= 8) - { - if (regnum & 1) - regnum++; /* all args > 4 bytes start in even register */ - - if (regnum < 18) - { - val = extract_signed_integer (&contents[ndx], 4); - write_register (regnum++, val); - - if (len >= 8) - val = extract_signed_integer (&contents[ndx+4], 4); - else - val = extract_signed_integer (&contents[ndx+4], len-4); - write_register (regnum++, val); - } - else - { - /* no more registers available. put it on the stack */ - - /* all args > 4 bytes are padded to a multiple of 8 bytes - and start on an 8 byte boundary */ - if (sp & 7) - sp -= (sp & 7); /* align it */ - - sp -= ((len + 7) & ~7); /* allocate space */ - write_memory (sp, &contents[ndx], len); - break; - } - } - } - else - { - if (regnum < 18 ) - { - val = extract_signed_integer (contents, len); - write_register (regnum++, val); - } - else - { - /* all args are padded to a multiple of 4 bytes (at least) */ - sp -= ((len + 3) & ~3); - write_memory (sp, contents, len); - } - } - } - if (sp & 7) - /* stack pointer is not on an 8 byte boundary -- align it */ - sp -= (sp & 7); - return sp; -} - - -/* pick an out-of-the-way place to set the return value */ -/* for an inferior function call. The link register is set to this */ -/* value and a momentary breakpoint is set there. When the breakpoint */ -/* is hit, the dummy frame is popped and the previous environment is */ -/* restored. */ - -CORE_ADDR -d30v_call_dummy_address () -{ - CORE_ADDR entry; - struct minimal_symbol *sym; - - entry = entry_point_address (); - - if (entry != 0) - return entry; - - sym = lookup_minimal_symbol ("_start", NULL, symfile_objfile); - - if (!sym || MSYMBOL_TYPE (sym) != mst_text) - return 0; - else - return SYMBOL_VALUE_ADDRESS (sym); -} - -/* Given a return value in `regbuf' with a type `valtype', - extract and copy its value into `valbuf'. */ - -void -d30v_extract_return_value (valtype, regbuf, valbuf) - struct type *valtype; - char regbuf[REGISTER_BYTES]; - char *valbuf; -{ - memcpy (valbuf, regbuf + REGISTER_BYTE (2), TYPE_LENGTH (valtype)); -} - -/* The following code implements access to, and display of, the D30V's - instruction trace buffer. The buffer consists of 64K or more - 4-byte words of data, of which each words includes an 8-bit count, - an 8-bit segment number, and a 16-bit instruction address. - - In theory, the trace buffer is continuously capturing instruction - data that the CPU presents on its "debug bus", but in practice, the - ROMified GDB stub only enables tracing when it continues or steps - the program, and stops tracing when the program stops; so it - actually works for GDB to read the buffer counter out of memory and - then read each trace word. The counter records where the tracing - stops, but there is no record of where it started, so we remember - the PC when we resumed and then search backwards in the trace - buffer for a word that includes that address. This is not perfect, - because you will miss trace data if the resumption PC is the target - of a branch. (The value of the buffer counter is semi-random, any - trace data from a previous program stop is gone.) */ - -/* The address of the last word recorded in the trace buffer. */ - -#define DBBC_ADDR (0xd80000) - -/* The base of the trace buffer, at least for the "Board_0". */ - -#define TRACE_BUFFER_BASE (0xf40000) - -static void trace_command PARAMS ((char *, int)); - -static void untrace_command PARAMS ((char *, int)); - -static void trace_info PARAMS ((char *, int)); - -static void tdisassemble_command PARAMS ((char *, int)); - -static void display_trace PARAMS ((int, int)); - -/* True when instruction traces are being collected. */ - -static int tracing; - -/* Remembered PC. */ - -static CORE_ADDR last_pc; - -/* True when trace output should be displayed whenever program stops. */ - -static int trace_display; - -/* True when trace listing should include source lines. */ - -static int default_trace_show_source = 1; - -struct trace_buffer { - int size; - short *counts; - CORE_ADDR *addrs; -} trace_data; - -static void -trace_command (args, from_tty) - char *args; - int from_tty; -{ - /* Clear the host-side trace buffer, allocating space if needed. */ - trace_data.size = 0; - if (trace_data.counts == NULL) - trace_data.counts = (short *) xmalloc (65536 * sizeof(short)); - if (trace_data.addrs == NULL) - trace_data.addrs = (CORE_ADDR *) xmalloc (65536 * sizeof(CORE_ADDR)); - - tracing = 1; - - printf_filtered ("Tracing is now on.\n"); -} - -static void -untrace_command (args, from_tty) - char *args; - int from_tty; -{ - tracing = 0; - - printf_filtered ("Tracing is now off.\n"); -} - -static void -trace_info (args, from_tty) - char *args; - int from_tty; -{ - int i; - - if (trace_data.size) - { - printf_filtered ("%d entries in trace buffer:\n", trace_data.size); - - for (i = 0; i < trace_data.size; ++i) - { - printf_filtered ("%d: %d instruction%s at 0x%x\n", - i, trace_data.counts[i], - (trace_data.counts[i] == 1 ? "" : "s"), - trace_data.addrs[i]); - } - } - else - printf_filtered ("No entries in trace buffer.\n"); - - printf_filtered ("Tracing is currently %s.\n", (tracing ? "on" : "off")); -} - -/* Print the instruction at address MEMADDR in debugged memory, - on STREAM. Returns length of the instruction, in bytes. */ - -static int -print_insn (memaddr, stream) - CORE_ADDR memaddr; - GDB_FILE *stream; -{ - /* If there's no disassembler, something is very wrong. */ - if (tm_print_insn == NULL) - abort (); - - if (TARGET_BYTE_ORDER == BIG_ENDIAN) - tm_print_insn_info.endian = BFD_ENDIAN_BIG; - else - tm_print_insn_info.endian = BFD_ENDIAN_LITTLE; - return (*tm_print_insn) (memaddr, &tm_print_insn_info); -} - -void -d30v_eva_prepare_to_trace () -{ - if (!tracing) - return; - - last_pc = read_register (PC_REGNUM); -} - -/* Collect trace data from the target board and format it into a form - more useful for display. */ - -void -d30v_eva_get_trace_data () -{ - int count, i, j, oldsize; - int trace_addr, trace_seg, trace_cnt, next_cnt; - unsigned int last_trace, trace_word, next_word; - unsigned int *tmpspace; - - if (!tracing) - return; - - tmpspace = xmalloc (65536 * sizeof(unsigned int)); - - last_trace = read_memory_unsigned_integer (DBBC_ADDR, 2) << 2; - - /* Collect buffer contents from the target, stopping when we reach - the word recorded when execution resumed. */ - - count = 0; - while (last_trace > 0) - { - QUIT; - trace_word = - read_memory_unsigned_integer (TRACE_BUFFER_BASE + last_trace, 4); - trace_addr = trace_word & 0xffff; - last_trace -= 4; - /* Ignore an apparently nonsensical entry. */ - if (trace_addr == 0xffd5) - continue; - tmpspace[count++] = trace_word; - if (trace_addr == last_pc) - break; - if (count > 65535) - break; - } - - /* Move the data to the host-side trace buffer, adjusting counts to - include the last instruction executed and transforming the address - into something that GDB likes. */ - - for (i = 0; i < count; ++i) - { - trace_word = tmpspace[i]; - next_word = ((i == 0) ? 0 : tmpspace[i - 1]); - trace_addr = trace_word & 0xffff; - next_cnt = (next_word >> 24) & 0xff; - j = trace_data.size + count - i - 1; - trace_data.addrs[j] = (trace_addr << 2) + 0x1000000; - trace_data.counts[j] = next_cnt + 1; - } - - oldsize = trace_data.size; - trace_data.size += count; - - free (tmpspace); - - if (trace_display) - display_trace (oldsize, trace_data.size); -} - -static void -tdisassemble_command (arg, from_tty) - char *arg; - int from_tty; -{ - int i, count; - CORE_ADDR low, high; - char *space_index; - - if (!arg) - { - low = 0; - high = trace_data.size; - } - else if (!(space_index = (char *) strchr (arg, ' '))) - { - low = parse_and_eval_address (arg); - high = low + 5; - } - else - { - /* Two arguments. */ - *space_index = '\0'; - low = parse_and_eval_address (arg); - high = parse_and_eval_address (space_index + 1); - if (high < low) - high = low; - } - - printf_filtered ("Dump of trace from %d to %d:\n", low, high); - - display_trace (low, high); - - printf_filtered ("End of trace dump.\n"); - gdb_flush (gdb_stdout); -} - -static void -display_trace (low, high) - int low, high; -{ - int i, count, trace_show_source, first, suppress; - CORE_ADDR next_address; - - trace_show_source = default_trace_show_source; - if (!have_full_symbols () && !have_partial_symbols()) - { - trace_show_source = 0; - printf_filtered ("No symbol table is loaded. Use the \"file\" command.\n"); - printf_filtered ("Trace will not display any source.\n"); - } - - first = 1; - suppress = 0; - for (i = low; i < high; ++i) - { - next_address = trace_data.addrs[i]; - count = trace_data.counts[i]; - while (count-- > 0) - { - QUIT; - if (trace_show_source) - { - struct symtab_and_line sal, sal_prev; - - sal_prev = find_pc_line (next_address - 4, 0); - sal = find_pc_line (next_address, 0); - - if (sal.symtab) - { - if (first || sal.line != sal_prev.line) - print_source_lines (sal.symtab, sal.line, sal.line + 1, 0); - suppress = 0; - } - else - { - if (!suppress) - /* FIXME-32x64--assumes sal.pc fits in long. */ - printf_filtered ("No source file for address %s.\n", - local_hex_string((unsigned long) sal.pc)); - suppress = 1; - } - } - first = 0; - print_address (next_address, gdb_stdout); - printf_filtered (":"); - printf_filtered ("\t"); - wrap_here (" "); - next_address = next_address + print_insn (next_address, gdb_stdout); - printf_filtered ("\n"); - gdb_flush (gdb_stdout); - } - } -} - -extern void (*target_resume_hook) PARAMS ((void)); -extern void (*target_wait_loop_hook) PARAMS ((void)); - -void -_initialize_d30v_tdep () -{ - tm_print_insn = print_insn_d30v; - - target_resume_hook = d30v_eva_prepare_to_trace; - target_wait_loop_hook = d30v_eva_get_trace_data; - - add_info ("flags", print_flags_command, "Print d30v flags."); - - add_com ("trace", class_support, trace_command, - "Enable tracing of instruction execution."); - - add_com ("untrace", class_support, untrace_command, - "Disable tracing of instruction execution."); - - add_com ("tdisassemble", class_vars, tdisassemble_command, - "Disassemble the trace buffer.\n\ -Two optional arguments specify a range of trace buffer entries\n\ -as reported by info trace (NOT addresses!)."); - - add_info ("trace", trace_info, - "Display info about the trace data buffer."); - - add_show_from_set (add_set_cmd ("tracedisplay", no_class, - var_integer, (char *)&trace_display, - "Set automatic display of trace.\n", &setlist), - &showlist); - add_show_from_set (add_set_cmd ("tracesource", no_class, - var_integer, (char *)&default_trace_show_source, - "Set display of source code with trace.\n", &setlist), - &showlist); - -} |