// OBSOLETE /* Definitions to make GDB run on a mips box under Mach 3.0 // OBSOLETE Copyright 1992, 1993, 1998, 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 /* Mach specific routines for little endian mips (e.g. pmax) // OBSOLETE * running Mach 3.0 // OBSOLETE * // OBSOLETE * Author: Jukka Virtanen // OBSOLETE */ // OBSOLETE // OBSOLETE #include "defs.h" // OBSOLETE #include "inferior.h" // OBSOLETE #include "regcache.h" // OBSOLETE // OBSOLETE #include // OBSOLETE // OBSOLETE #include // OBSOLETE #include // OBSOLETE #include // OBSOLETE #include // OBSOLETE // OBSOLETE /* Find offsets to thread states at compile time. // OBSOLETE * If your compiler does not grok this, check the hand coded // OBSOLETE * offsets and use them. // OBSOLETE */ // OBSOLETE // OBSOLETE #if 1 // OBSOLETE // OBSOLETE #define REG_OFFSET(reg) (int)(&((struct mips_thread_state *)0)->reg) // OBSOLETE #define CREG_OFFSET(reg) (int)(&((struct mips_float_state *)0)->reg) // OBSOLETE #define EREG_OFFSET(reg) (int)(&((struct mips_exc_state *)0)->reg) // OBSOLETE // OBSOLETE /* at reg_offset[i] is the offset to the mips_thread_state // OBSOLETE * location where the gdb registers[i] is stored. // OBSOLETE * // OBSOLETE * -1 means mach does not save it anywhere. // OBSOLETE */ // OBSOLETE static int reg_offset[] = // OBSOLETE { // OBSOLETE /* zero at v0 v1 */ // OBSOLETE -1, REG_OFFSET (r1), REG_OFFSET (r2), REG_OFFSET (r3), // OBSOLETE // OBSOLETE /* a0 a1 a2 a3 */ // OBSOLETE REG_OFFSET (r4), REG_OFFSET (r5), REG_OFFSET (r6), REG_OFFSET (r7), // OBSOLETE // OBSOLETE /* t0 t1 t2 t3 */ // OBSOLETE REG_OFFSET (r8), REG_OFFSET (r9), REG_OFFSET (r10), REG_OFFSET (r11), // OBSOLETE // OBSOLETE /* t4 t5 t6 t7 */ // OBSOLETE REG_OFFSET (r12), REG_OFFSET (r13), REG_OFFSET (r14), REG_OFFSET (r15), // OBSOLETE // OBSOLETE /* s0 s1 s2 s3 */ // OBSOLETE REG_OFFSET (r16), REG_OFFSET (r17), REG_OFFSET (r18), REG_OFFSET (r19), // OBSOLETE // OBSOLETE /* s4 s5 s6 s7 */ // OBSOLETE REG_OFFSET (r20), REG_OFFSET (r21), REG_OFFSET (r22), REG_OFFSET (r23), // OBSOLETE // OBSOLETE /* t8 t9 k0 k1 */ // OBSOLETE REG_OFFSET (r24), REG_OFFSET (r25), REG_OFFSET (r26), REG_OFFSET (r27), // OBSOLETE // OBSOLETE /* gp sp s8(30) == fp(72) ra */ // OBSOLETE REG_OFFSET (r28), REG_OFFSET (r29), REG_OFFSET (r30), REG_OFFSET (r31), // OBSOLETE // OBSOLETE /* sr(32) PS_REGNUM */ // OBSOLETE EREG_OFFSET (coproc_state), // OBSOLETE // OBSOLETE /* lo(33) hi(34) */ // OBSOLETE REG_OFFSET (mdlo), REG_OFFSET (mdhi), // OBSOLETE // OBSOLETE /* bad(35) cause(36) pc(37) */ // OBSOLETE EREG_OFFSET (address), EREG_OFFSET (cause), REG_OFFSET (pc), // OBSOLETE // OBSOLETE /* f0(38) f1(39) f2(40) f3(41) */ // OBSOLETE CREG_OFFSET (r0), CREG_OFFSET (r1), CREG_OFFSET (r2), CREG_OFFSET (r3), // OBSOLETE CREG_OFFSET (r4), CREG_OFFSET (r5), CREG_OFFSET (r6), CREG_OFFSET (r7), // OBSOLETE CREG_OFFSET (r8), CREG_OFFSET (r9), CREG_OFFSET (r10), CREG_OFFSET (r11), // OBSOLETE CREG_OFFSET (r12), CREG_OFFSET (r13), CREG_OFFSET (r14), CREG_OFFSET (r15), // OBSOLETE CREG_OFFSET (r16), CREG_OFFSET (r17), CREG_OFFSET (r18), CREG_OFFSET (r19), // OBSOLETE CREG_OFFSET (r20), CREG_OFFSET (r21), CREG_OFFSET (r22), CREG_OFFSET (r23), // OBSOLETE CREG_OFFSET (r24), CREG_OFFSET (r25), CREG_OFFSET (r26), CREG_OFFSET (r27), // OBSOLETE CREG_OFFSET (r28), CREG_OFFSET (r29), CREG_OFFSET (r30), CREG_OFFSET (r31), // OBSOLETE // OBSOLETE /* fsr(70) fir(71) fp(72) == s8(30) */ // OBSOLETE CREG_OFFSET (csr), CREG_OFFSET (esr), REG_OFFSET (r30) // OBSOLETE }; // OBSOLETE #else // OBSOLETE /* If the compiler does not grok the above defines */ // OBSOLETE static int reg_offset[] = // OBSOLETE { // OBSOLETE /* mach_thread_state offsets: */ // OBSOLETE -1, 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, // OBSOLETE 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, // OBSOLETE /*sr, lo, hi,addr,cause,pc */ // OBSOLETE 8, 124, 128, 4, 0, 132, // OBSOLETE /* mach_float_state offsets: */ // OBSOLETE 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, // OBSOLETE 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, // OBSOLETE /*fsr,fir */ // OBSOLETE 128, 132, // OBSOLETE /* FP_REGNUM pseudo maps to s8==r30 in mach_thread_state */ // OBSOLETE 116 // OBSOLETE }; // OBSOLETE #endif // OBSOLETE // OBSOLETE /* Fetch COUNT contiguous registers from thread STATE starting from REGNUM // OBSOLETE * Caller knows that the regs handled in one transaction are of same size. // OBSOLETE */ // OBSOLETE #define FETCH_REGS(state, regnum, count) \ // OBSOLETE memcpy (&deprecated_registers[REGISTER_BYTE (regnum)], \ // OBSOLETE (char *)state+reg_offset[ regnum ], \ // OBSOLETE count*REGISTER_SIZE) // OBSOLETE // OBSOLETE /* Store COUNT contiguous registers to thread STATE starting from REGNUM */ // OBSOLETE #define STORE_REGS(state, regnum, count) \ // OBSOLETE memcpy ((char *)state+reg_offset[ regnum ], \ // OBSOLETE &deprecated_registers[REGISTER_BYTE (regnum)], \ // OBSOLETE count*REGISTER_SIZE) // OBSOLETE // OBSOLETE #define REGS_ALL -1 // OBSOLETE #define REGS_NORMAL 1 // OBSOLETE #define REGS_EXC 2 // OBSOLETE #define REGS_COP1 4 // OBSOLETE // OBSOLETE /* Hardware regs that matches FP_REGNUM */ // OBSOLETE #define MACH_FP_REGNUM 30 // OBSOLETE // OBSOLETE /* Fech thread's registers. if regno == -1, fetch all regs */ // OBSOLETE void // OBSOLETE fetch_inferior_registers (int regno) // OBSOLETE { // OBSOLETE kern_return_t ret; // OBSOLETE // OBSOLETE thread_state_data_t state; // OBSOLETE struct mips_exc_state exc_state; // OBSOLETE // OBSOLETE int stateCnt = MIPS_THREAD_STATE_COUNT; // OBSOLETE // OBSOLETE int which_regs = 0; /* A bit mask */ // OBSOLETE // OBSOLETE if (!MACH_PORT_VALID (current_thread)) // OBSOLETE error ("fetch inferior registers: Invalid thread"); // OBSOLETE // OBSOLETE if (regno < -1 || regno >= NUM_REGS) // OBSOLETE error ("invalid register %d supplied to fetch_inferior_registers", regno); // OBSOLETE // OBSOLETE if (regno == -1) // OBSOLETE which_regs = REGS_ALL; // OBSOLETE else if (regno == ZERO_REGNUM) // OBSOLETE { // OBSOLETE int zero = 0; // OBSOLETE supply_register (ZERO_REGNUM, &zero); // OBSOLETE return; // OBSOLETE } // OBSOLETE else if ((ZERO_REGNUM < regno && regno < PS_REGNUM) // OBSOLETE || regno == FP_REGNUM // OBSOLETE || regno == LO_REGNUM // OBSOLETE || regno == HI_REGNUM // OBSOLETE || regno == PC_REGNUM) // OBSOLETE which_regs = REGS_NORMAL; // OBSOLETE else if (FP0_REGNUM <= regno && regno <= FCRIR_REGNUM) // OBSOLETE which_regs = REGS_COP1 | REGS_EXC; // OBSOLETE else // OBSOLETE which_regs = REGS_EXC; // OBSOLETE // OBSOLETE /* fetch regs saved to mips_thread_state */ // OBSOLETE if (which_regs & REGS_NORMAL) // OBSOLETE { // OBSOLETE ret = thread_get_state (current_thread, // OBSOLETE MIPS_THREAD_STATE, // OBSOLETE state, // OBSOLETE &stateCnt); // OBSOLETE CHK ("fetch inferior registers: thread_get_state", ret); // OBSOLETE // OBSOLETE if (which_regs == REGS_NORMAL) // OBSOLETE { // OBSOLETE /* Fetch also FP_REGNUM if fetching MACH_FP_REGNUM and vice versa */ // OBSOLETE if (regno == MACH_FP_REGNUM || regno == FP_REGNUM) // OBSOLETE { // OBSOLETE supply_register (FP_REGNUM, // OBSOLETE (char *) state + reg_offset[MACH_FP_REGNUM]); // OBSOLETE supply_register (MACH_FP_REGNUM, // OBSOLETE (char *) state + reg_offset[MACH_FP_REGNUM]); // OBSOLETE } // OBSOLETE else // OBSOLETE supply_register (regno, // OBSOLETE (char *) state + reg_offset[regno]); // OBSOLETE return; // OBSOLETE } // OBSOLETE // OBSOLETE /* ZERO_REGNUM is always zero */ // OBSOLETE *(int *) deprecated_registers = 0; // OBSOLETE // OBSOLETE /* Copy thread saved regs 1..31 to gdb's reg value array // OBSOLETE * Luckily, they are contiquous // OBSOLETE */ // OBSOLETE FETCH_REGS (state, 1, 31); // OBSOLETE // OBSOLETE /* Copy mdlo and mdhi */ // OBSOLETE FETCH_REGS (state, LO_REGNUM, 2); // OBSOLETE // OBSOLETE /* Copy PC */ // OBSOLETE FETCH_REGS (state, PC_REGNUM, 1); // OBSOLETE // OBSOLETE /* Mach 3.0 saves FP to MACH_FP_REGNUM. // OBSOLETE * For some reason gdb wants to assign a pseudo register for it. // OBSOLETE */ // OBSOLETE FETCH_REGS (state, FP_REGNUM, 1); // OBSOLETE } // OBSOLETE // OBSOLETE /* Read exc state. Also read if need to fetch floats */ // OBSOLETE if (which_regs & REGS_EXC) // OBSOLETE { // OBSOLETE stateCnt = MIPS_EXC_STATE_COUNT; // OBSOLETE ret = thread_get_state (current_thread, // OBSOLETE MIPS_EXC_STATE, // OBSOLETE (thread_state_t) & exc_state, // OBSOLETE &stateCnt); // OBSOLETE CHK ("fetch inferior regs (exc): thread_get_state", ret); // OBSOLETE // OBSOLETE /* We need to fetch exc_state to see if the floating // OBSOLETE * state is valid for the thread. // OBSOLETE */ // OBSOLETE // OBSOLETE /* cproc_state: Which coprocessors the thread uses */ // OBSOLETE supply_register (PS_REGNUM, // OBSOLETE (char *) &exc_state + reg_offset[PS_REGNUM]); // OBSOLETE // OBSOLETE if (which_regs == REGS_EXC || which_regs == REGS_ALL) // OBSOLETE { // OBSOLETE supply_register (BADVADDR_REGNUM, // OBSOLETE (char *) &exc_state + reg_offset[BADVADDR_REGNUM]); // OBSOLETE // OBSOLETE supply_register (CAUSE_REGNUM, // OBSOLETE (char *) &exc_state + reg_offset[CAUSE_REGNUM]); // OBSOLETE if (which_regs == REGS_EXC) // OBSOLETE return; // OBSOLETE } // OBSOLETE } // OBSOLETE // OBSOLETE // OBSOLETE if (which_regs & REGS_COP1) // OBSOLETE { // OBSOLETE /* If the thread does not have saved COPROC1, set regs to zero */ // OBSOLETE // OBSOLETE if (!(exc_state.coproc_state & MIPS_STATUS_USE_COP1)) // OBSOLETE bzero (&deprecated_registers[REGISTER_BYTE (FP0_REGNUM)], // OBSOLETE sizeof (struct mips_float_state)); // OBSOLETE else // OBSOLETE { // OBSOLETE stateCnt = MIPS_FLOAT_STATE_COUNT; // OBSOLETE ret = thread_get_state (current_thread, // OBSOLETE MIPS_FLOAT_STATE, // OBSOLETE state, // OBSOLETE &stateCnt); // OBSOLETE CHK ("fetch inferior regs (floats): thread_get_state", ret); // OBSOLETE // OBSOLETE if (regno != -1) // OBSOLETE { // OBSOLETE supply_register (regno, // OBSOLETE (char *) state + reg_offset[regno]); // OBSOLETE return; // OBSOLETE } // OBSOLETE // OBSOLETE FETCH_REGS (state, FP0_REGNUM, 34); // OBSOLETE } // OBSOLETE } // OBSOLETE // OBSOLETE /* All registers are valid, if not returned yet */ // OBSOLETE deprecated_registers_fetched (); // OBSOLETE } // OBSOLETE // OBSOLETE /* Store gdb's view of registers to the thread. // OBSOLETE * All registers are always valid when entering here. // OBSOLETE * @@ ahem, maybe that is too strict, we could validate the necessary ones // OBSOLETE * here. // OBSOLETE * // OBSOLETE * Hmm. It seems that gdb set $reg=value command first reads everything, // OBSOLETE * then sets the reg and then stores everything. -> we must make sure // OBSOLETE * that the immutable registers are not changed by reading them first. // OBSOLETE */ // OBSOLETE // OBSOLETE void // OBSOLETE store_inferior_registers (register int regno) // OBSOLETE { // OBSOLETE thread_state_data_t state; // OBSOLETE kern_return_t ret; // OBSOLETE // OBSOLETE if (!MACH_PORT_VALID (current_thread)) // OBSOLETE error ("store inferior registers: Invalid thread"); // OBSOLETE // OBSOLETE /* Check for read only regs. // OBSOLETE * @@ If some of these is can be changed, fix this // OBSOLETE */ // OBSOLETE if (regno == ZERO_REGNUM || // OBSOLETE regno == PS_REGNUM || // OBSOLETE regno == BADVADDR_REGNUM || // OBSOLETE regno == CAUSE_REGNUM || // OBSOLETE regno == FCRIR_REGNUM) // OBSOLETE { // OBSOLETE message ("You can not alter read-only register `%s'", // OBSOLETE REGISTER_NAME (regno)); // OBSOLETE fetch_inferior_registers (regno); // OBSOLETE return; // OBSOLETE } // OBSOLETE // OBSOLETE if (regno == -1) // OBSOLETE { // OBSOLETE /* Don't allow these to change */ // OBSOLETE // OBSOLETE /* ZERO_REGNUM */ // OBSOLETE *(int *) deprecated_registers = 0; // OBSOLETE // OBSOLETE fetch_inferior_registers (PS_REGNUM); // OBSOLETE fetch_inferior_registers (BADVADDR_REGNUM); // OBSOLETE fetch_inferior_registers (CAUSE_REGNUM); // OBSOLETE fetch_inferior_registers (FCRIR_REGNUM); // OBSOLETE } // OBSOLETE // OBSOLETE if (regno == -1 || (ZERO_REGNUM < regno && regno <= PC_REGNUM)) // OBSOLETE { // OBSOLETE #if 1 // OBSOLETE /* Mach 3.0 saves thread's FP to MACH_FP_REGNUM. // OBSOLETE * GDB wants assigns a pseudo register FP_REGNUM for frame pointer. // OBSOLETE * // OBSOLETE * @@@ Here I assume (!) that gdb's FP has the value that // OBSOLETE * should go to threads frame pointer. If not true, this // OBSOLETE * fails badly!!!!! // OBSOLETE */ // OBSOLETE memcpy (&deprecated_registers[REGISTER_BYTE (MACH_FP_REGNUM)], // OBSOLETE &deprecated_registers[REGISTER_BYTE (FP_REGNUM)], // OBSOLETE REGISTER_RAW_SIZE (FP_REGNUM)); // OBSOLETE #endif // OBSOLETE // OBSOLETE /* Save gdb's regs 1..31 to thread saved regs 1..31 // OBSOLETE * Luckily, they are contiquous // OBSOLETE */ // OBSOLETE STORE_REGS (state, 1, 31); // OBSOLETE // OBSOLETE /* Save mdlo, mdhi */ // OBSOLETE STORE_REGS (state, LO_REGNUM, 2); // OBSOLETE // OBSOLETE /* Save PC */ // OBSOLETE STORE_REGS (state, PC_REGNUM, 1); // OBSOLETE // OBSOLETE ret = thread_set_state (current_thread, // OBSOLETE MIPS_THREAD_STATE, // OBSOLETE state, // OBSOLETE MIPS_FLOAT_STATE_COUNT); // OBSOLETE CHK ("store inferior regs : thread_set_state", ret); // OBSOLETE } // OBSOLETE // OBSOLETE if (regno == -1 || regno >= FP0_REGNUM) // OBSOLETE { // OBSOLETE /* If thread has floating state, save it */ // OBSOLETE if (read_register (PS_REGNUM) & MIPS_STATUS_USE_COP1) // OBSOLETE { // OBSOLETE /* Do NOT save FCRIR_REGNUM */ // OBSOLETE STORE_REGS (state, FP0_REGNUM, 33); // OBSOLETE // OBSOLETE ret = thread_set_state (current_thread, // OBSOLETE MIPS_FLOAT_STATE, // OBSOLETE state, // OBSOLETE MIPS_FLOAT_STATE_COUNT); // OBSOLETE CHK ("store inferior registers (floats): thread_set_state", ret); // OBSOLETE } // OBSOLETE else if (regno != -1) // OBSOLETE message // OBSOLETE ("Thread does not use floating point unit, floating regs not saved"); // OBSOLETE } // OBSOLETE }