From 071ea11e85eb9d529cc5eb3d35f6247466a21b99 Mon Sep 17 00:00:00 2001 From: Stan Shebs Date: Fri, 16 Apr 1999 01:34:07 +0000 Subject: Initial creation of sourceware repository --- gdb/mipsm3-nat.c | 386 ------------------------------------------------------- 1 file changed, 386 deletions(-) delete mode 100644 gdb/mipsm3-nat.c (limited to 'gdb/mipsm3-nat.c') diff --git a/gdb/mipsm3-nat.c b/gdb/mipsm3-nat.c deleted file mode 100644 index 089ecd6..0000000 --- a/gdb/mipsm3-nat.c +++ /dev/null @@ -1,386 +0,0 @@ -/* Definitions to make GDB run on a mips box under Mach 3.0 - Copyright (C) 1992 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. */ - -/* Mach specific routines for little endian mips (e.g. pmax) - * running Mach 3.0 - * - * Author: Jukka Virtanen - */ - -#include "defs.h" -#include "inferior.h" - -#include - -#include -#include -#include -#include - -/* Find offsets to thread states at compile time. - * If your compiler does not grok this, check the hand coded - * offsets and use them. - */ - -#if 1 - -#define REG_OFFSET(reg) (int)(&((struct mips_thread_state *)0)->reg) -#define CREG_OFFSET(reg) (int)(&((struct mips_float_state *)0)->reg) -#define EREG_OFFSET(reg) (int)(&((struct mips_exc_state *)0)->reg) - -/* at reg_offset[i] is the offset to the mips_thread_state - * location where the gdb registers[i] is stored. - * - * -1 means mach does not save it anywhere. - */ -static int reg_offset[] = -{ - /* zero at v0 v1 */ - -1, REG_OFFSET(r1), REG_OFFSET(r2), REG_OFFSET(r3), - - /* a0 a1 a2 a3 */ - REG_OFFSET(r4), REG_OFFSET(r5), REG_OFFSET(r6), REG_OFFSET(r7), - - /* t0 t1 t2 t3 */ - REG_OFFSET(r8), REG_OFFSET(r9), REG_OFFSET(r10), REG_OFFSET(r11), - - /* t4 t5 t6 t7 */ - REG_OFFSET(r12), REG_OFFSET(r13), REG_OFFSET(r14), REG_OFFSET(r15), - - /* s0 s1 s2 s3 */ - REG_OFFSET(r16), REG_OFFSET(r17), REG_OFFSET(r18), REG_OFFSET(r19), - - /* s4 s5 s6 s7 */ - REG_OFFSET(r20), REG_OFFSET(r21), REG_OFFSET(r22), REG_OFFSET(r23), - - /* t8 t9 k0 k1 */ - REG_OFFSET(r24), REG_OFFSET(r25), REG_OFFSET(r26), REG_OFFSET(r27), - - /* gp sp s8(30) == fp(72) ra */ - REG_OFFSET(r28), REG_OFFSET(r29), REG_OFFSET(r30), REG_OFFSET(r31), - - /* sr(32) PS_REGNUM */ - EREG_OFFSET(coproc_state), - - /* lo(33) hi(34) */ - REG_OFFSET(mdlo), REG_OFFSET(mdhi), - - /* bad(35) cause(36) pc(37) */ - EREG_OFFSET(address), EREG_OFFSET(cause), REG_OFFSET(pc), - - /* f0(38) f1(39) f2(40) f3(41) */ - CREG_OFFSET(r0), CREG_OFFSET(r1), CREG_OFFSET(r2), CREG_OFFSET(r3), - CREG_OFFSET(r4), CREG_OFFSET(r5), CREG_OFFSET(r6), CREG_OFFSET(r7), - CREG_OFFSET(r8), CREG_OFFSET(r9), CREG_OFFSET(r10), CREG_OFFSET(r11), - CREG_OFFSET(r12), CREG_OFFSET(r13), CREG_OFFSET(r14), CREG_OFFSET(r15), - CREG_OFFSET(r16), CREG_OFFSET(r17), CREG_OFFSET(r18), CREG_OFFSET(r19), - CREG_OFFSET(r20), CREG_OFFSET(r21), CREG_OFFSET(r22), CREG_OFFSET(r23), - CREG_OFFSET(r24), CREG_OFFSET(r25), CREG_OFFSET(r26), CREG_OFFSET(r27), - CREG_OFFSET(r28), CREG_OFFSET(r29), CREG_OFFSET(r30), CREG_OFFSET(r31), - - /* fsr(70) fir(71) fp(72) == s8(30) */ - CREG_OFFSET(csr), CREG_OFFSET(esr), REG_OFFSET(r30) -}; -#else -/* If the compiler does not grok the above defines */ -static int reg_offset[] = -{ -/* mach_thread_state offsets: */ - -1, 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, - 60, 64, 68, 72, 76, 80, 84, 88, 92, 96,100,104, 108,112,116,120, -/*sr, lo, hi,addr,cause,pc */ - 8,124,128, 4, 0,132, -/* mach_float_state offsets: */ - 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, - 64, 68, 72, 76, 80, 84, 88, 92, 96,100,104,108, 112,116,120,124, -/*fsr,fir*/ - 128,132, -/* FP_REGNUM pseudo maps to s8==r30 in mach_thread_state */ - 116 -}; -#endif - -/* Fetch COUNT contiguous registers from thread STATE starting from REGNUM - * Caller knows that the regs handled in one transaction are of same size. - */ -#define FETCH_REGS(state, regnum, count) \ - memcpy (®isters[REGISTER_BYTE (regnum)], \ - (char *)state+reg_offset[ regnum ], \ - count*REGISTER_SIZE) - -/* Store COUNT contiguous registers to thread STATE starting from REGNUM */ -#define STORE_REGS(state, regnum, count) \ - memcpy ((char *)state+reg_offset[ regnum ], \ - ®isters[REGISTER_BYTE (regnum)], \ - count*REGISTER_SIZE) - -#define REGS_ALL -1 -#define REGS_NORMAL 1 -#define REGS_EXC 2 -#define REGS_COP1 4 - -/* Hardware regs that matches FP_REGNUM */ -#define MACH_FP_REGNUM 30 - -/* Fech thread's registers. if regno == -1, fetch all regs */ -void -fetch_inferior_registers (regno) - int regno; -{ - kern_return_t ret; - - thread_state_data_t state; - struct mips_exc_state exc_state; - - int stateCnt = MIPS_THREAD_STATE_COUNT; - - int which_regs = 0; /* A bit mask */ - - if (! MACH_PORT_VALID (current_thread)) - error ("fetch inferior registers: Invalid thread"); - - if (regno < -1 || regno >= NUM_REGS) - error ("invalid register %d supplied to fetch_inferior_registers", regno); - - if (regno == -1) - which_regs = REGS_ALL; - else if (regno == ZERO_REGNUM) - { - int zero = 0; - supply_register (ZERO_REGNUM, &zero); - return; - } - else if ((ZERO_REGNUM < regno && regno < PS_REGNUM) - || regno == FP_REGNUM - || regno == LO_REGNUM - || regno == HI_REGNUM - || regno == PC_REGNUM) - which_regs = REGS_NORMAL; - else if (FP0_REGNUM <= regno && regno <= FCRIR_REGNUM) - which_regs = REGS_COP1 | REGS_EXC; - else - which_regs = REGS_EXC; - - /* fetch regs saved to mips_thread_state */ - if (which_regs & REGS_NORMAL) - { - ret = thread_get_state (current_thread, - MIPS_THREAD_STATE, - state, - &stateCnt); - CHK ("fetch inferior registers: thread_get_state", ret); - - if (which_regs == REGS_NORMAL) - { - /* Fetch also FP_REGNUM if fetching MACH_FP_REGNUM and vice versa */ - if (regno == MACH_FP_REGNUM || regno == FP_REGNUM) - { - supply_register (FP_REGNUM, - (char *)state+reg_offset[ MACH_FP_REGNUM ]); - supply_register (MACH_FP_REGNUM, - (char *)state+reg_offset[ MACH_FP_REGNUM ]); - } - else - supply_register (regno, - (char *)state+reg_offset[ regno ]); - return; - } - - /* ZERO_REGNUM is always zero */ - *(int *) registers = 0; - - /* Copy thread saved regs 1..31 to gdb's reg value array - * Luckily, they are contiquous - */ - FETCH_REGS (state, 1, 31); - - /* Copy mdlo and mdhi */ - FETCH_REGS (state, LO_REGNUM, 2); - - /* Copy PC */ - FETCH_REGS (state, PC_REGNUM, 1); - - /* Mach 3.0 saves FP to MACH_FP_REGNUM. - * For some reason gdb wants to assign a pseudo register for it. - */ - FETCH_REGS (state, FP_REGNUM, 1); - } - - /* Read exc state. Also read if need to fetch floats */ - if (which_regs & REGS_EXC) - { - stateCnt = MIPS_EXC_STATE_COUNT; - ret = thread_get_state (current_thread, - MIPS_EXC_STATE, - (thread_state_t) &exc_state, - &stateCnt); - CHK ("fetch inferior regs (exc): thread_get_state", ret); - - /* We need to fetch exc_state to see if the floating - * state is valid for the thread. - */ - - /* cproc_state: Which coprocessors the thread uses */ - supply_register (PS_REGNUM, - (char *)&exc_state+reg_offset[ PS_REGNUM ]); - - if (which_regs == REGS_EXC || which_regs == REGS_ALL) - { - supply_register (BADVADDR_REGNUM, - (char *)&exc_state+reg_offset[ BADVADDR_REGNUM ]); - - supply_register (CAUSE_REGNUM, - (char *)&exc_state+reg_offset[ CAUSE_REGNUM ]); - if (which_regs == REGS_EXC) - return; - } - } - - - if (which_regs & REGS_COP1) - { - /* If the thread does not have saved COPROC1, set regs to zero */ - - if (! (exc_state.coproc_state & MIPS_STATUS_USE_COP1)) - bzero (®isters[ REGISTER_BYTE (FP0_REGNUM) ], - sizeof (struct mips_float_state)); - else - { - stateCnt = MIPS_FLOAT_STATE_COUNT; - ret = thread_get_state (current_thread, - MIPS_FLOAT_STATE, - state, - &stateCnt); - CHK ("fetch inferior regs (floats): thread_get_state", ret); - - if (regno != -1) - { - supply_register (regno, - (char *)state+reg_offset[ regno ]); - return; - } - - FETCH_REGS (state, FP0_REGNUM, 34); - } - } - - /* All registers are valid, if not returned yet */ - registers_fetched (); -} - -/* Store gdb's view of registers to the thread. - * All registers are always valid when entering here. - * @@ ahem, maybe that is too strict, we could validate the necessary ones - * here. - * - * Hmm. It seems that gdb set $reg=value command first reads everything, - * then sets the reg and then stores everything. -> we must make sure - * that the immutable registers are not changed by reading them first. - */ - -void -store_inferior_registers (regno) - register int regno; -{ - thread_state_data_t state; - kern_return_t ret; - - if (! MACH_PORT_VALID (current_thread)) - error ("store inferior registers: Invalid thread"); - - /* Check for read only regs. - * @@ If some of these is can be changed, fix this - */ - if (regno == ZERO_REGNUM || - regno == PS_REGNUM || - regno == BADVADDR_REGNUM || - regno == CAUSE_REGNUM || - regno == FCRIR_REGNUM) - { - message ("You can not alter read-only register `%s'", - REGISTER_NAME ( regno )); - fetch_inferior_registers (regno); - return; - } - - if (regno == -1) - { - /* Don't allow these to change */ - - /* ZERO_REGNUM */ - *(int *)registers = 0; - - fetch_inferior_registers (PS_REGNUM); - fetch_inferior_registers (BADVADDR_REGNUM); - fetch_inferior_registers (CAUSE_REGNUM); - fetch_inferior_registers (FCRIR_REGNUM); - } - - if (regno == -1 || (ZERO_REGNUM < regno && regno <= PC_REGNUM)) - { -#if 1 - /* Mach 3.0 saves thread's FP to MACH_FP_REGNUM. - * GDB wants assigns a pseudo register FP_REGNUM for frame pointer. - * - * @@@ Here I assume (!) that gdb's FP has the value that - * should go to threads frame pointer. If not true, this - * fails badly!!!!! - */ - memcpy (®isters[REGISTER_BYTE (MACH_FP_REGNUM)], - ®isters[REGISTER_BYTE (FP_REGNUM)], - REGISTER_RAW_SIZE (FP_REGNUM)); -#endif - - /* Save gdb's regs 1..31 to thread saved regs 1..31 - * Luckily, they are contiquous - */ - STORE_REGS (state, 1, 31); - - /* Save mdlo, mdhi */ - STORE_REGS (state, LO_REGNUM, 2); - - /* Save PC */ - STORE_REGS (state, PC_REGNUM, 1); - - ret = thread_set_state (current_thread, - MIPS_THREAD_STATE, - state, - MIPS_FLOAT_STATE_COUNT); - CHK ("store inferior regs : thread_set_state", ret); - } - - if (regno == -1 || regno >= FP0_REGNUM) - { - /* If thread has floating state, save it */ - if (read_register (PS_REGNUM) & MIPS_STATUS_USE_COP1) - { - /* Do NOT save FCRIR_REGNUM */ - STORE_REGS (state, FP0_REGNUM, 33); - - ret = thread_set_state (current_thread, - MIPS_FLOAT_STATE, - state, - MIPS_FLOAT_STATE_COUNT); - CHK ("store inferior registers (floats): thread_set_state", ret); - } - else if (regno != -1) - message - ("Thread does not use floating point unit, floating regs not saved"); - } -} -- cgit v1.1