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349 lines
12 KiB
C
349 lines
12 KiB
C
/*
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* Alpha register context support
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*
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* Copyright (C) 2004 Vincent Béron
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#ifdef __ALPHA__
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#include <assert.h>
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#include <errno.h>
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#ifdef HAVE_SYS_REG_H
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# include <sys/reg.h>
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#endif
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#include <stdarg.h>
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#include <unistd.h>
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#ifdef HAVE_SYS_PTRACE_H
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# include <sys/ptrace.h>
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#endif
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#include "file.h"
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#include "thread.h"
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#include "request.h"
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#if 0 /* no longer used */
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#ifdef HAVE_SYS_USER_H
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# include <sys/user.h>
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#endif
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/* user definitions from asm/user.h */
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struct kernel_user_struct
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{
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unsigned long regs[EF_SIZE/8+32];
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size_t u_tsize;
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size_t u_dsize;
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size_t u_ssize;
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unsigned long start_code;
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unsigned long start_data;
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unsigned long start_stack;
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long int signal;
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struct regs * u_ar0;
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unsigned long magic;
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char u_comm[32];
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};
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/* get thread context */
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static void get_thread_context( struct thread *thread, unsigned int flags, CONTEXT *context )
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{
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int pid = get_ptrace_pid(thread);
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if (flags & CONTEXT_FULL)
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{
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struct kernel_user_struct regs;
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if (ptrace( PTRACE_GETREGS, pid, 0, ®s ) == -1) goto error;
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if (flags & CONTEXT_INTEGER)
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{
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context->IntV0 = regs.regs[EF_V0];
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context->IntT0 = regs.regs[EF_T0];
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context->IntT1 = regs.regs[EF_T1];
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context->IntT2 = regs.regs[EF_T2];
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context->IntT3 = regs.regs[EF_T3];
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context->IntT4 = regs.regs[EF_T4];
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context->IntT5 = regs.regs[EF_T5];
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context->IntT6 = regs.regs[EF_T6];
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context->IntT7 = regs.regs[EF_T7];
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context->IntS0 = regs.regs[EF_S0];
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context->IntS1 = regs.regs[EF_S1];
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context->IntS2 = regs.regs[EF_S2];
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context->IntS3 = regs.regs[EF_S3];
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context->IntS4 = regs.regs[EF_S4];
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context->IntS5 = regs.regs[EF_S5];
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context->IntFp = regs.regs[EF_S6];
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context->IntA0 = regs.regs[EF_A0];
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context->IntA1 = regs.regs[EF_A1];
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context->IntA2 = regs.regs[EF_A2];
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context->IntA3 = regs.regs[EF_A3];
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context->IntA4 = regs.regs[EF_A4];
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context->IntA5 = regs.regs[EF_A5];
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context->IntT8 = regs.regs[EF_T8];
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context->IntT9 = regs.regs[EF_T9];
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context->IntT10 = regs.regs[EF_T10];
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context->IntT11 = regs.regs[EF_T11];
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context->IntT12 = regs.regs[EF_T12];
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context->IntAt = regs.regs[EF_AT];
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context->IntZero = 0;
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}
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if (flags & CONTEXT_CONTROL)
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{
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context->IntRa = regs.regs[EF_RA];
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context->IntGp = regs.regs[EF_GP];
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context->IntSp = regs.regs[EF_SP];
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context->Fir = regs.regs[EF_PC];
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context->Psr = regs.regs[EF_PS];
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}
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if (flags & CONTEXT_FLOATING_POINT)
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{
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context->FltF0 = regs.regs[EF_SIZE/8+0];
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context->FltF1 = regs.regs[EF_SIZE/8+1];
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context->FltF2 = regs.regs[EF_SIZE/8+2];
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context->FltF3 = regs.regs[EF_SIZE/8+3];
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context->FltF4 = regs.regs[EF_SIZE/8+4];
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context->FltF5 = regs.regs[EF_SIZE/8+5];
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context->FltF6 = regs.regs[EF_SIZE/8+6];
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context->FltF7 = regs.regs[EF_SIZE/8+7];
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context->FltF8 = regs.regs[EF_SIZE/8+8];
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context->FltF9 = regs.regs[EF_SIZE/8+9];
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context->FltF10 = regs.regs[EF_SIZE/8+10];
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context->FltF11 = regs.regs[EF_SIZE/8+11];
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context->FltF12 = regs.regs[EF_SIZE/8+12];
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context->FltF13 = regs.regs[EF_SIZE/8+13];
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context->FltF14 = regs.regs[EF_SIZE/8+14];
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context->FltF15 = regs.regs[EF_SIZE/8+15];
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context->FltF16 = regs.regs[EF_SIZE/8+16];
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context->FltF17 = regs.regs[EF_SIZE/8+17];
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context->FltF18 = regs.regs[EF_SIZE/8+18];
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context->FltF19 = regs.regs[EF_SIZE/8+19];
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context->FltF20 = regs.regs[EF_SIZE/8+20];
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context->FltF21 = regs.regs[EF_SIZE/8+21];
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context->FltF22 = regs.regs[EF_SIZE/8+22];
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context->FltF23 = regs.regs[EF_SIZE/8+23];
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context->FltF24 = regs.regs[EF_SIZE/8+24];
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context->FltF25 = regs.regs[EF_SIZE/8+25];
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context->FltF26 = regs.regs[EF_SIZE/8+26];
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context->FltF27 = regs.regs[EF_SIZE/8+27];
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context->FltF28 = regs.regs[EF_SIZE/8+28];
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context->FltF29 = regs.regs[EF_SIZE/8+29];
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context->FltF30 = regs.regs[EF_SIZE/8+30];
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context->FltF31 = 0;
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context->Fpcr = regs.regs[EF_SIZE/8+31];
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context->SoftFpcr = 0; /* FIXME */
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}
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context->ContextFlags |= flags & CONTEXT_FULL;
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}
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return;
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error:
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file_set_error();
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}
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/* set a thread context */
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static void set_thread_context( struct thread *thread, unsigned int flags, const CONTEXT *context )
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{
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int pid = get_ptrace_pid(thread);
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if (flags & CONTEXT_FULL)
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{
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struct kernel_user_struct regs;
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if (ptrace( PTRACE_GETREGS, pid, 0, ®s ) == -1) goto error;
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if (flags & CONTEXT_INTEGER)
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{
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regs.regs[EF_V0] = context->IntV0;
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regs.regs[EF_T0] = context->IntT0;
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regs.regs[EF_T1] = context->IntT1;
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regs.regs[EF_T2] = context->IntT2;
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regs.regs[EF_T3] = context->IntT3;
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regs.regs[EF_T4] = context->IntT4;
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regs.regs[EF_T5] = context->IntT5;
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regs.regs[EF_T6] = context->IntT6;
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regs.regs[EF_T7] = context->IntT7;
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regs.regs[EF_S0] = context->IntS0;
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regs.regs[EF_S1] = context->IntS1;
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regs.regs[EF_S2] = context->IntS2;
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regs.regs[EF_S3] = context->IntS3;
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regs.regs[EF_S4] = context->IntS4;
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regs.regs[EF_S5] = context->IntS5;
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regs.regs[EF_S6] = context->IntFp;
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regs.regs[EF_A0] = context->IntA0;
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regs.regs[EF_A1] = context->IntA1;
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regs.regs[EF_A2] = context->IntA2;
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regs.regs[EF_A3] = context->IntA3;
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regs.regs[EF_A4] = context->IntA4;
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regs.regs[EF_A5] = context->IntA5;
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regs.regs[EF_T8] = context->IntT8;
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regs.regs[EF_T9] = context->IntT9;
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regs.regs[EF_T10] = context->IntT10;
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regs.regs[EF_T11] = context->IntT11;
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regs.regs[EF_T12] = context->IntT12;
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regs.regs[EF_AT] = context->IntAt;
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}
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if (flags & CONTEXT_CONTROL)
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{
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regs.regs[EF_RA] = context->IntRa;
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regs.regs[EF_GP] = context->IntGp;
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regs.regs[EF_SP] = context->IntSp;
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regs.regs[EF_PC] = context->Fir;
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regs.regs[EF_PS] = context->Psr;
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}
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if (flags & CONTEXT_FLOATING_POINT)
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{
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regs.regs[EF_SIZE/8+0] = context->FltF0;
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regs.regs[EF_SIZE/8+1] = context->FltF1;
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regs.regs[EF_SIZE/8+2] = context->FltF2;
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regs.regs[EF_SIZE/8+3] = context->FltF3;
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regs.regs[EF_SIZE/8+4] = context->FltF4;
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regs.regs[EF_SIZE/8+5] = context->FltF5;
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regs.regs[EF_SIZE/8+6] = context->FltF6;
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regs.regs[EF_SIZE/8+7] = context->FltF7;
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regs.regs[EF_SIZE/8+8] = context->FltF8;
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regs.regs[EF_SIZE/8+9] = context->FltF9;
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regs.regs[EF_SIZE/8+10] = context->FltF10;
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regs.regs[EF_SIZE/8+11] = context->FltF11;
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regs.regs[EF_SIZE/8+12] = context->FltF12;
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regs.regs[EF_SIZE/8+13] = context->FltF13;
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regs.regs[EF_SIZE/8+14] = context->FltF14;
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regs.regs[EF_SIZE/8+15] = context->FltF15;
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regs.regs[EF_SIZE/8+16] = context->FltF16;
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regs.regs[EF_SIZE/8+17] = context->FltF17;
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regs.regs[EF_SIZE/8+18] = context->FltF18;
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regs.regs[EF_SIZE/8+19] = context->FltF19;
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regs.regs[EF_SIZE/8+20] = context->FltF20;
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regs.regs[EF_SIZE/8+21] = context->FltF21;
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regs.regs[EF_SIZE/8+22] = context->FltF22;
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regs.regs[EF_SIZE/8+23] = context->FltF23;
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regs.regs[EF_SIZE/8+24] = context->FltF24;
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regs.regs[EF_SIZE/8+25] = context->FltF25;
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regs.regs[EF_SIZE/8+26] = context->FltF26;
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regs.regs[EF_SIZE/8+27] = context->FltF27;
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regs.regs[EF_SIZE/8+28] = context->FltF28;
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regs.regs[EF_SIZE/8+29] = context->FltF29;
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regs.regs[EF_SIZE/8+30] = context->FltF30;
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regs.regs[EF_SIZE/8+31] = context->Fpcr;
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}
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if (ptrace( PTRACE_SETREGS, pid, 0, ®s ) == -1) goto error;
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}
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return;
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error:
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file_set_error();
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}
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#endif /* 0 */
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/* copy a context structure according to the flags */
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void copy_context( CONTEXT *to, const CONTEXT *from, unsigned int flags )
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{
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flags &= ~CONTEXT_ALPHA; /* get rid of CPU id */
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if (flags & CONTEXT_CONTROL)
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{
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to->IntRa = from->IntRa;
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to->IntGp = from->IntGp;
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to->IntSp = from->IntSp;
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to->Fir = from->Fir;
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to->Psr = from->Psr;
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}
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if (flags & CONTEXT_INTEGER)
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{
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to->IntV0 = from->IntV0;
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to->IntT0 = from->IntT0;
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to->IntT1 = from->IntT1;
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to->IntT2 = from->IntT2;
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to->IntT3 = from->IntT3;
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to->IntT4 = from->IntT4;
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to->IntT5 = from->IntT5;
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to->IntT6 = from->IntT6;
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to->IntT7 = from->IntT7;
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to->IntS0 = from->IntS0;
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to->IntS1 = from->IntS1;
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to->IntS2 = from->IntS2;
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to->IntS3 = from->IntS3;
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to->IntS4 = from->IntS4;
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to->IntS5 = from->IntS5;
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to->IntFp = from->IntFp;
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to->IntA0 = from->IntA0;
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to->IntA1 = from->IntA1;
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to->IntA2 = from->IntA2;
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to->IntA3 = from->IntA3;
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to->IntA4 = from->IntA4;
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to->IntA5 = from->IntA5;
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to->IntT8 = from->IntT8;
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to->IntT9 = from->IntT9;
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to->IntT10 = from->IntT10;
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to->IntT11 = from->IntT11;
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to->IntT12 = from->IntT12;
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to->IntAt = from->IntAt;
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to->IntZero = from->IntZero;
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}
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if (flags & CONTEXT_FLOATING_POINT)
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{
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to->FltF0 = from->FltF0;
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to->FltF1 = from->FltF1;
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to->FltF2 = from->FltF2;
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to->FltF3 = from->FltF3;
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to->FltF4 = from->FltF4;
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to->FltF5 = from->FltF5;
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to->FltF6 = from->FltF6;
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to->FltF7 = from->FltF7;
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to->FltF8 = from->FltF8;
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to->FltF9 = from->FltF9;
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to->FltF10 = from->FltF10;
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to->FltF11 = from->FltF11;
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to->FltF12 = from->FltF12;
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to->FltF13 = from->FltF13;
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to->FltF14 = from->FltF14;
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to->FltF15 = from->FltF15;
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to->FltF16 = from->FltF16;
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to->FltF17 = from->FltF17;
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to->FltF18 = from->FltF18;
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to->FltF19 = from->FltF19;
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to->FltF20 = from->FltF20;
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to->FltF21 = from->FltF21;
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to->FltF22 = from->FltF22;
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to->FltF23 = from->FltF23;
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to->FltF24 = from->FltF24;
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to->FltF25 = from->FltF25;
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to->FltF26 = from->FltF26;
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to->FltF27 = from->FltF27;
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to->FltF28 = from->FltF28;
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to->FltF29 = from->FltF29;
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to->FltF30 = from->FltF30;
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to->FltF31 = from->FltF31;
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to->Fpcr = from->Fpcr;
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to->SoftFpcr = from->SoftFpcr;
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}
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to->ContextFlags |= flags;
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}
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/* retrieve the current instruction pointer of a context */
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void *get_context_ip( const CONTEXT *context )
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{
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return (void *)context->Fir;
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}
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/* return the context flag that contains the CPU id */
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unsigned int get_context_cpu_flag(void)
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{
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return CONTEXT_ALPHA;
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}
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/* return only the context flags that correspond to system regs */
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/* (system regs are the ones we can't access on the client side) */
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unsigned int get_context_system_regs( unsigned int flags )
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{
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return 0; /* FIXME: implement client-side handling */
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}
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#endif /* __ALPHA__ */
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