From: Steve Chamberlain Date: Fri, 2 Jul 1993 21:25:04 +0000 (+0000) Subject: New target macros for getting at the pc, sp and fp. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=85e07872b61df1351ceb99e5f32d2fbe022c9eb4;p=binutils-gdb.git New target macros for getting at the pc, sp and fp. * infcmd.c (read_pc, write_pc): Modify to use new macros. (read_sp, write_sp, read_fp, write_fp): New functions. * blockframe.c (reinit_frame_cache, get_prev_frame_info): Use new functions. * breakpoint.c (bpstat_alloc): ditto. * infrun.c (wait_for_inferior): ditto. * stack.c (print_frame_info): ditto. * valops (call_function_by_hand): ditto. * corelow.c (core_open): ditto. * h8500-tdep.c: (target_read_sp, target_write_sp, target_read_pc, target_write_pc, target_read_fp, target_write_fp): New functions. * inferior.h (read_sp, write_sp, read_fp, write_fp): Prototypes. --- diff --git a/gdb/ChangeLog b/gdb/ChangeLog index b8d29285d52..a5f8bbfde7c 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,21 @@ +Fri Jul 2 13:33:12 1993 Steve Chamberlain (sac@phydeaux.cygnus.com) + + New target macros for getting at the pc, sp and fp. + * infcmd.c (read_pc, write_pc): Modify to use new macros. + (read_sp, write_sp, read_fp, write_fp): New functions. + * blockframe.c (reinit_frame_cache, get_prev_frame_info): Use new functions. + * breakpoint.c (bpstat_alloc): ditto. + * infrun.c (wait_for_inferior): ditto. + * stack.c (print_frame_info): ditto. + * valops (call_function_by_hand): ditto. + * corelow.c (core_open): ditto. + * h8500-tdep.c: (target_read_sp, target_write_sp, target_read_pc, + target_write_pc, target_read_fp, target_write_fp): New functions. + * inferior.h (read_sp, write_sp, read_fp, write_fp): Prototypes. + + * config/alpha/xm-alpha.h: Add MAKEVA_END. + * config/h8500/tm-h8500.h: Define new macros. + Fri Jul 2 13:51:04 1993 Ian Lance Taylor (ian@cygnus.com) * configure.in (mipos-*-riscos*): New host and target; use riscos. diff --git a/gdb/corelow.c b/gdb/corelow.c index de9af10b8f3..ce39b58440b 100644 --- a/gdb/corelow.c +++ b/gdb/corelow.c @@ -165,7 +165,7 @@ core_open (filename, from_tty) #endif /* Now, set up the frame cache, and print the top of stack */ - set_current_frame (create_new_frame (read_register (FP_REGNUM), + set_current_frame (create_new_frame (read_fp (), read_pc ())); select_frame (get_current_frame (), 0); print_stack_frame (selected_frame, selected_frame_level, 1); diff --git a/gdb/h8500-tdep.c b/gdb/h8500-tdep.c index 2ef16d1a6aa..782d889b441 100644 --- a/gdb/h8500-tdep.c +++ b/gdb/h8500-tdep.c @@ -35,7 +35,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define UNSIGNED_SHORT(X) ((X) & 0xffff) -/* Shape of an H8/500 frame : +/* Shape of an H8/500 frame : arg-n @@ -78,9 +78,10 @@ CORE_ADDR examine_prologue (); void frame_find_saved_regs (); -int regoff[NUM_REGS] = {0, 2, 4, 6, 8, 10, 12, 14, /* r0->r7 */ - 16, 18, /* ccr, pc */ - 20, 21, 22, 23}; /* cp, dp, ep, tp */ +int regoff[NUM_REGS] = +{0, 2, 4, 6, 8, 10, 12, 14, /* r0->r7 */ + 16, 18, /* ccr, pc */ + 20, 21, 22, 23}; /* cp, dp, ep, tp */ CORE_ADDR h8500_skip_prologue (start_pc) @@ -93,13 +94,13 @@ h8500_skip_prologue (start_pc) if (w == LINK_8) { start_pc += 2; - w = read_memory_integer (start_pc,1); + w = read_memory_integer (start_pc, 1); } if (w == LINK_16) { start_pc += 3; - w = read_memory_integer (start_pc,2); + w = read_memory_integer (start_pc, 2); } return start_pc; @@ -111,7 +112,7 @@ print_insn (memaddr, stream) FILE *stream; { disassemble_info info; - GDB_INIT_DISASSEMBLE_INFO(info, stream); + GDB_INIT_DISASSEMBLE_INFO (info, stream); return print_insn_h8500 (memaddr, &info); } @@ -128,8 +129,8 @@ h8500_frame_chain (thisframe) { if (!inside_entry_file (thisframe->pc)) - return (read_memory_integer(thisframe->frame, 2) & 0xffff) - | (read_register(SEG_T_REGNUM) << 16); + return (read_memory_integer (thisframe->frame, 2) & 0xffff) + | (read_register (SEG_T_REGNUM) << 16); else return 0; } @@ -326,6 +327,7 @@ examine_prologue (ip, limit, after_prolog_fp, fsr, fi) return (ip); } + #endif /* Return the saved PC from this frame. */ @@ -460,7 +462,7 @@ h8500_register_virtual_type (regno) case CCR_REGNUM: return builtin_type_unsigned_short; default: - abort(); + abort (); } } @@ -498,7 +500,7 @@ frame_find_saved_regs (frame_info, frame_saved_regs) regs using the amount of storage from the link instruction. */ - thebyte = read_memory_integer(pc, 1); + thebyte = read_memory_integer (pc, 1); if (0x1f == thebyte) next_addr = (frame_info)->frame + read_memory_integer (pc += 1, 2), pc += 2; else if (0x17 == thebyte) @@ -507,38 +509,40 @@ frame_find_saved_regs (frame_info, frame_saved_regs) goto lose; #if 0 fixme steve - /* If have an add:g.waddal #-n, sp next, adjust next_addr. */ - if ((0x0c0177777 & read_memory_integer (pc, 2)) == 0157774) - next_addr += read_memory_integer (pc += 2, 4), pc += 4; + /* If have an add:g.waddal #-n, sp next, adjust next_addr. */ + if ((0x0c0177777 & read_memory_integer (pc, 2)) == 0157774) + next_addr += read_memory_integer (pc += 2, 4), pc += 4; #endif } - thebyte = read_memory_integer(pc, 1); - if (thebyte == 0x12) { - /* Got stm */ - pc++; - regmask = read_memory_integer(pc,1); - pc++; - for (regnum = 0; regnum < 8; regnum ++, regmask >>=1) - { - if (regmask & 1) - { - (frame_saved_regs)->regs[regnum] = (next_addr += 2) - 2; - } - } - thebyte = read_memory_integer(pc, 1); - } + thebyte = read_memory_integer (pc, 1); + if (thebyte == 0x12) + { + /* Got stm */ + pc++; + regmask = read_memory_integer (pc, 1); + pc++; + for (regnum = 0; regnum < 8; regnum++, regmask >>= 1) + { + if (regmask & 1) + { + (frame_saved_regs)->regs[regnum] = (next_addr += 2) - 2; + } + } + thebyte = read_memory_integer (pc, 1); + } /* Maybe got a load of pushes */ - while (thebyte == 0xbf) { - pc++; - regnum = read_memory_integer(pc,1) & 0x7; - pc++; - (frame_saved_regs)->regs[regnum] = (next_addr += 2) - 2; - thebyte = read_memory_integer(pc, 1); - } - - lose:; - + while (thebyte == 0xbf) + { + pc++; + regnum = read_memory_integer (pc, 1) & 0x7; + pc++; + (frame_saved_regs)->regs[regnum] = (next_addr += 2) - 2; + thebyte = read_memory_integer (pc, 1); + } + +lose:; + /* Remember the address of the frame pointer */ (frame_saved_regs)->regs[FP_REGNUM] = (frame_info)->frame; @@ -549,10 +553,10 @@ frame_find_saved_regs (frame_info, frame_saved_regs) (frame_saved_regs)->regs[PC_REGNUM] = (frame_info)->frame + 2; } -saved_pc_after_call(frame) +saved_pc_after_call (frame) { int x; - int a = read_register(SP_REGNUM); + int a = read_register (SP_REGNUM); x = read_memory_integer (a, PTR_SIZE); return x; } @@ -560,11 +564,11 @@ saved_pc_after_call(frame) /* Nonzero if instruction at PC is a return instruction. */ -about_to_return(pc) +about_to_return (pc) { - int b1 = read_memory_integer(pc,1); + int b1 = read_memory_integer (pc, 1); - switch (b1) + switch (b1) { case 0x14: /* rtd #8 */ case 0x1c: /* rtd #16 */ @@ -573,8 +577,8 @@ about_to_return(pc) return 1; case 0x11: { - int b2 = read_memory_integer(pc+1,1); - switch (b2) + int b2 = read_memory_integer (pc + 1, 1); + switch (b2) { case 0x18: /* prts */ case 0x14: /* prtd #8 */ @@ -647,7 +651,7 @@ h8500_is_trapped_internalvar (name) if (name[0] != 'p') return 0; - if (strcmp(name+1, "pc") == 0) + if (strcmp (name + 1, "pc") == 0) return 1; if (name[1] == 'r' @@ -674,13 +678,18 @@ h8500_value_of_trapped_internalvar (var) case 'c': page_regnum = SEG_C_REGNUM; break; - case '0': case '1': case '2': case '3': + case '0': + case '1': + case '2': + case '3': page_regnum = SEG_D_REGNUM; break; - case '4': case '5': + case '4': + case '5': page_regnum = SEG_E_REGNUM; break; - case '6': case '7': + case '6': + case '7': page_regnum = SEG_T_REGNUM; break; } @@ -718,11 +727,11 @@ h8500_set_trapped_internalvar (var, newval, bitpos, bitsize, offset) if ((newval_type_code != TYPE_CODE_INT && newval_type_code != TYPE_CODE_PTR) - || TYPE_LENGTH (type) != sizeof(new_regval)) - error("Illegal type (%s) for assignment to $%s\n", - TYPE_NAME (type), var->name); + || TYPE_LENGTH (type) != sizeof (new_regval)) + error ("Illegal type (%s) for assignment to $%s\n", + TYPE_NAME (type), var->name); - new_regval = *(long *)VALUE_CONTENTS_RAW(newval); + new_regval = *(long *) VALUE_CONTENTS_RAW (newval); regnum = var->name + 1; @@ -731,22 +740,27 @@ h8500_set_trapped_internalvar (var, newval, bitpos, bitsize, offset) case 'c': page_regnum = "cp"; break; - case '0': case '1': case '2': case '3': + case '0': + case '1': + case '2': + case '3': page_regnum = "dp"; break; - case '4': case '5': + case '4': + case '5': page_regnum = "ep"; break; - case '6': case '7': + case '6': + case '7': page_regnum = "tp"; break; } sprintf (expression, "$%s=%d", page_regnum, new_regval >> 16); - parse_and_eval(expression); + parse_and_eval (expression); sprintf (expression, "$%s=%d", regnum, new_regval & 0xffff); - parse_and_eval(expression); + parse_and_eval (expression); } _initialize_h8500_tdep () @@ -760,3 +774,45 @@ _initialize_h8500_tdep () "Set unsegmented memory model.", &setmemorylist); } + +CORE_ADDR +target_read_sp () +{ + return (read_register (SEG_T_REGNUM) << 16) | (read_register (SP_REGNUM)); +} + +void +target_write_sp (v) + CORE_ADDR v; +{ + write_register (SEG_T_REGNUM, v >> 16); + write_register (SP_REGNUM, v & 0xffff); +} + +CORE_ADDR +target_read_pc () +{ + return (read_register (SEG_C_REGNUM) << 16) | (read_register (PC_REGNUM)); +} + +void +target_write_pc (v) + CORE_ADDR v; +{ + write_register (SEG_C_REGNUM, v >> 16); + write_register (PC_REGNUM, v & 0xffff); +} + +CORE_ADDR +target_read_fp () +{ + return (read_register (SEG_T_REGNUM) << 16) | (read_register (FP_REGNUM)); +} + +void +target_write_fp (v) + CORE_ADDR v; +{ + write_register (SEG_T_REGNUM, v >> 16); + write_register (FP_REGNUM, v & 0xffff); +}