/* Low level interface to SPUs, for the remote server for GDB.
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/* Low level interface to SPUs, for the remote server for GDB.
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Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
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Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
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Contributed by Ulrich Weigand <uweigand@de.ibm.com>.
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Contributed by Ulrich Weigand <uweigand@de.ibm.com>.
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This file is part of GDB.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program 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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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include "server.h"
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#include <sys/wait.h>
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#include <sys/wait.h>
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#include <stdio.h>
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#include <stdio.h>
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#include <sys/ptrace.h>
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#include <sys/ptrace.h>
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#include <fcntl.h>
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#include <fcntl.h>
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#include <string.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <unistd.h>
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#include <errno.h>
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#include <errno.h>
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#include <sys/syscall.h>
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#include <sys/syscall.h>
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/* Some older glibc versions do not define this. */
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/* Some older glibc versions do not define this. */
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#ifndef __WNOTHREAD
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#ifndef __WNOTHREAD
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#define __WNOTHREAD 0x20000000 /* Don't wait on children of other
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#define __WNOTHREAD 0x20000000 /* Don't wait on children of other
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threads in this group */
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threads in this group */
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#endif
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#endif
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#define PTRACE_TYPE_RET long
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#define PTRACE_TYPE_RET long
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#define PTRACE_TYPE_ARG3 long
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#define PTRACE_TYPE_ARG3 long
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/* Number of registers. */
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/* Number of registers. */
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#define SPU_NUM_REGS 130
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#define SPU_NUM_REGS 130
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#define SPU_NUM_CORE_REGS 128
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#define SPU_NUM_CORE_REGS 128
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/* Special registers. */
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/* Special registers. */
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#define SPU_ID_REGNUM 128
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#define SPU_ID_REGNUM 128
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#define SPU_PC_REGNUM 129
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#define SPU_PC_REGNUM 129
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/* PPU side system calls. */
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/* PPU side system calls. */
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#define INSTR_SC 0x44000002
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#define INSTR_SC 0x44000002
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#define NR_spu_run 0x0116
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#define NR_spu_run 0x0116
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/* Get current thread ID (Linux task ID). */
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/* Get current thread ID (Linux task ID). */
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#define current_tid ((struct inferior_list_entry *)current_inferior)->id
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#define current_tid ((struct inferior_list_entry *)current_inferior)->id
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/* These are used in remote-utils.c. */
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/* These are used in remote-utils.c. */
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int using_threads = 0;
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int using_threads = 0;
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/* Fetch PPU register REGNO. */
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/* Fetch PPU register REGNO. */
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static CORE_ADDR
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static CORE_ADDR
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fetch_ppc_register (int regno)
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fetch_ppc_register (int regno)
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{
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{
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PTRACE_TYPE_RET res;
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PTRACE_TYPE_RET res;
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int tid = current_tid;
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int tid = current_tid;
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#ifndef __powerpc64__
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#ifndef __powerpc64__
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/* If running as a 32-bit process on a 64-bit system, we attempt
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/* If running as a 32-bit process on a 64-bit system, we attempt
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to get the full 64-bit register content of the target process.
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to get the full 64-bit register content of the target process.
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If the PPC special ptrace call fails, we're on a 32-bit system;
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If the PPC special ptrace call fails, we're on a 32-bit system;
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just fall through to the regular ptrace call in that case. */
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just fall through to the regular ptrace call in that case. */
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{
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{
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char buf[8];
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char buf[8];
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errno = 0;
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errno = 0;
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ptrace (PPC_PTRACE_PEEKUSR_3264, tid,
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ptrace (PPC_PTRACE_PEEKUSR_3264, tid,
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(PTRACE_TYPE_ARG3) (regno * 8), buf);
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(PTRACE_TYPE_ARG3) (regno * 8), buf);
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if (errno == 0)
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if (errno == 0)
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ptrace (PPC_PTRACE_PEEKUSR_3264, tid,
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ptrace (PPC_PTRACE_PEEKUSR_3264, tid,
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(PTRACE_TYPE_ARG3) (regno * 8 + 4), buf + 4);
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(PTRACE_TYPE_ARG3) (regno * 8 + 4), buf + 4);
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if (errno == 0)
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if (errno == 0)
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return (CORE_ADDR) *(unsigned long long *)buf;
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return (CORE_ADDR) *(unsigned long long *)buf;
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}
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}
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#endif
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#endif
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errno = 0;
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errno = 0;
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res = ptrace (PT_READ_U, tid,
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res = ptrace (PT_READ_U, tid,
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(PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0);
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(PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0);
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if (errno != 0)
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if (errno != 0)
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{
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{
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char mess[128];
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char mess[128];
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sprintf (mess, "reading PPC register #%d", regno);
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sprintf (mess, "reading PPC register #%d", regno);
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perror_with_name (mess);
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perror_with_name (mess);
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}
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}
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return (CORE_ADDR) (unsigned long) res;
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return (CORE_ADDR) (unsigned long) res;
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}
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}
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/* Fetch WORD from PPU memory at (aligned) MEMADDR in thread TID. */
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/* Fetch WORD from PPU memory at (aligned) MEMADDR in thread TID. */
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static int
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static int
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fetch_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET *word)
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fetch_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET *word)
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{
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{
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errno = 0;
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errno = 0;
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#ifndef __powerpc64__
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#ifndef __powerpc64__
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if (memaddr >> 32)
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if (memaddr >> 32)
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{
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{
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unsigned long long addr_8 = (unsigned long long) memaddr;
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unsigned long long addr_8 = (unsigned long long) memaddr;
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ptrace (PPC_PTRACE_PEEKTEXT_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word);
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ptrace (PPC_PTRACE_PEEKTEXT_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word);
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}
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}
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else
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else
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#endif
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#endif
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*word = ptrace (PT_READ_I, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, 0);
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*word = ptrace (PT_READ_I, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, 0);
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return errno;
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return errno;
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}
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}
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/* Store WORD into PPU memory at (aligned) MEMADDR in thread TID. */
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/* Store WORD into PPU memory at (aligned) MEMADDR in thread TID. */
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static int
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static int
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store_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET word)
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store_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET word)
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{
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{
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errno = 0;
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errno = 0;
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#ifndef __powerpc64__
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#ifndef __powerpc64__
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if (memaddr >> 32)
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if (memaddr >> 32)
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{
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{
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unsigned long long addr_8 = (unsigned long long) memaddr;
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unsigned long long addr_8 = (unsigned long long) memaddr;
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ptrace (PPC_PTRACE_POKEDATA_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word);
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ptrace (PPC_PTRACE_POKEDATA_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word);
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}
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}
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else
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else
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#endif
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#endif
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ptrace (PT_WRITE_D, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, word);
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ptrace (PT_WRITE_D, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, word);
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return errno;
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return errno;
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}
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}
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/* Fetch LEN bytes of PPU memory at MEMADDR to MYADDR. */
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/* Fetch LEN bytes of PPU memory at MEMADDR to MYADDR. */
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static int
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static int
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fetch_ppc_memory (CORE_ADDR memaddr, char *myaddr, int len)
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fetch_ppc_memory (CORE_ADDR memaddr, char *myaddr, int len)
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{
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{
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int i, ret;
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int i, ret;
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CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET);
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CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET);
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int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
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int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
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/ sizeof (PTRACE_TYPE_RET));
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/ sizeof (PTRACE_TYPE_RET));
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PTRACE_TYPE_RET *buffer;
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PTRACE_TYPE_RET *buffer;
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int tid = current_tid;
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int tid = current_tid;
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buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET));
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buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET));
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for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
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for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
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if ((ret = fetch_ppc_memory_1 (tid, addr, &buffer[i])) != 0)
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if ((ret = fetch_ppc_memory_1 (tid, addr, &buffer[i])) != 0)
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return ret;
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return ret;
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memcpy (myaddr,
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memcpy (myaddr,
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(char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
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(char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
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len);
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len);
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return 0;
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return 0;
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}
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}
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/* Store LEN bytes from MYADDR to PPU memory at MEMADDR. */
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/* Store LEN bytes from MYADDR to PPU memory at MEMADDR. */
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static int
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static int
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store_ppc_memory (CORE_ADDR memaddr, char *myaddr, int len)
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store_ppc_memory (CORE_ADDR memaddr, char *myaddr, int len)
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{
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{
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int i, ret;
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int i, ret;
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CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET);
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CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET);
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int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
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int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
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/ sizeof (PTRACE_TYPE_RET));
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/ sizeof (PTRACE_TYPE_RET));
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PTRACE_TYPE_RET *buffer;
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PTRACE_TYPE_RET *buffer;
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int tid = current_tid;
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int tid = current_tid;
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buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET));
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buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET));
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if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET))
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if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET))
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if ((ret = fetch_ppc_memory_1 (tid, addr, &buffer[0])) != 0)
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if ((ret = fetch_ppc_memory_1 (tid, addr, &buffer[0])) != 0)
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return ret;
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return ret;
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if (count > 1)
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if (count > 1)
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if ((ret = fetch_ppc_memory_1 (tid, addr + (count - 1)
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if ((ret = fetch_ppc_memory_1 (tid, addr + (count - 1)
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* sizeof (PTRACE_TYPE_RET),
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* sizeof (PTRACE_TYPE_RET),
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&buffer[count - 1])) != 0)
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&buffer[count - 1])) != 0)
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return ret;
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return ret;
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memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
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memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
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myaddr, len);
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myaddr, len);
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for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
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for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
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if ((ret = store_ppc_memory_1 (tid, addr, buffer[i])) != 0)
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if ((ret = store_ppc_memory_1 (tid, addr, buffer[i])) != 0)
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return ret;
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return ret;
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return 0;
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return 0;
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}
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}
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/* If the PPU thread is currently stopped on a spu_run system call,
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/* If the PPU thread is currently stopped on a spu_run system call,
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return to FD and ADDR the file handle and NPC parameter address
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return to FD and ADDR the file handle and NPC parameter address
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used with the system call. Return non-zero if successful. */
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used with the system call. Return non-zero if successful. */
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static int
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static int
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parse_spufs_run (int *fd, CORE_ADDR *addr)
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parse_spufs_run (int *fd, CORE_ADDR *addr)
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{
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{
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char buf[4];
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char buf[4];
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CORE_ADDR pc = fetch_ppc_register (32); /* nip */
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CORE_ADDR pc = fetch_ppc_register (32); /* nip */
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/* Fetch instruction preceding current NIP. */
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/* Fetch instruction preceding current NIP. */
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if (fetch_ppc_memory (pc-4, buf, 4) != 0)
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if (fetch_ppc_memory (pc-4, buf, 4) != 0)
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return 0;
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return 0;
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/* It should be a "sc" instruction. */
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/* It should be a "sc" instruction. */
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if (*(unsigned int *)buf != INSTR_SC)
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if (*(unsigned int *)buf != INSTR_SC)
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return 0;
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return 0;
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/* System call number should be NR_spu_run. */
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/* System call number should be NR_spu_run. */
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if (fetch_ppc_register (0) != NR_spu_run)
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if (fetch_ppc_register (0) != NR_spu_run)
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return 0;
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return 0;
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/* Register 3 contains fd, register 4 the NPC param pointer. */
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/* Register 3 contains fd, register 4 the NPC param pointer. */
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*fd = fetch_ppc_register (34); /* orig_gpr3 */
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*fd = fetch_ppc_register (34); /* orig_gpr3 */
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*addr = fetch_ppc_register (4);
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*addr = fetch_ppc_register (4);
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return 1;
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return 1;
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}
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}
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/* Copy LEN bytes at OFFSET in spufs file ANNEX into/from READBUF or WRITEBUF,
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/* Copy LEN bytes at OFFSET in spufs file ANNEX into/from READBUF or WRITEBUF,
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using the /proc file system. */
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using the /proc file system. */
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static int
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static int
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spu_proc_xfer_spu (const char *annex, unsigned char *readbuf,
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spu_proc_xfer_spu (const char *annex, unsigned char *readbuf,
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const unsigned char *writebuf,
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const unsigned char *writebuf,
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CORE_ADDR offset, int len)
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CORE_ADDR offset, int len)
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{
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{
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char buf[128];
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char buf[128];
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int fd = 0;
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int fd = 0;
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int ret = -1;
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int ret = -1;
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if (!annex)
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if (!annex)
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return 0;
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return 0;
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sprintf (buf, "/proc/%ld/fd/%s", current_tid, annex);
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sprintf (buf, "/proc/%ld/fd/%s", current_tid, annex);
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fd = open (buf, writebuf? O_WRONLY : O_RDONLY);
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fd = open (buf, writebuf? O_WRONLY : O_RDONLY);
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if (fd <= 0)
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if (fd <= 0)
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return -1;
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return -1;
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if (offset != 0
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if (offset != 0
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&& lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset)
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&& lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset)
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{
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{
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close (fd);
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close (fd);
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return 0;
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return 0;
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}
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}
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if (writebuf)
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if (writebuf)
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ret = write (fd, writebuf, (size_t) len);
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ret = write (fd, writebuf, (size_t) len);
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else if (readbuf)
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else if (readbuf)
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ret = read (fd, readbuf, (size_t) len);
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ret = read (fd, readbuf, (size_t) len);
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close (fd);
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close (fd);
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return ret;
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return ret;
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}
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}
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/* Start an inferior process and returns its pid.
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/* Start an inferior process and returns its pid.
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ALLARGS is a vector of program-name and args. */
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ALLARGS is a vector of program-name and args. */
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static int
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static int
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spu_create_inferior (char *program, char **allargs)
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spu_create_inferior (char *program, char **allargs)
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{
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{
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int pid;
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int pid;
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|
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pid = fork ();
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pid = fork ();
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if (pid < 0)
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if (pid < 0)
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perror_with_name ("fork");
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perror_with_name ("fork");
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|
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if (pid == 0)
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if (pid == 0)
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{
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{
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ptrace (PTRACE_TRACEME, 0, 0, 0);
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ptrace (PTRACE_TRACEME, 0, 0, 0);
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|
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setpgid (0, 0);
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setpgid (0, 0);
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execv (program, allargs);
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execv (program, allargs);
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if (errno == ENOENT)
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if (errno == ENOENT)
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execvp (program, allargs);
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execvp (program, allargs);
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fprintf (stderr, "Cannot exec %s: %s.\n", program,
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fprintf (stderr, "Cannot exec %s: %s.\n", program,
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strerror (errno));
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strerror (errno));
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fflush (stderr);
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fflush (stderr);
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_exit (0177);
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_exit (0177);
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}
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}
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|
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add_thread (pid, NULL, pid);
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add_thread (pid, NULL, pid);
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return pid;
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return pid;
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}
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}
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|
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/* Attach to an inferior process. */
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/* Attach to an inferior process. */
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int
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int
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spu_attach (unsigned long pid)
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spu_attach (unsigned long pid)
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{
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{
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if (ptrace (PTRACE_ATTACH, pid, 0, 0) != 0)
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if (ptrace (PTRACE_ATTACH, pid, 0, 0) != 0)
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{
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{
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fprintf (stderr, "Cannot attach to process %ld: %s (%d)\n", pid,
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fprintf (stderr, "Cannot attach to process %ld: %s (%d)\n", pid,
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strerror (errno), errno);
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strerror (errno), errno);
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fflush (stderr);
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fflush (stderr);
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_exit (0177);
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_exit (0177);
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}
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}
|
|
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add_thread (pid, NULL, pid);
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add_thread (pid, NULL, pid);
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return 0;
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return 0;
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}
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}
|
|
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/* Kill the inferior process. */
|
/* Kill the inferior process. */
|
static void
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static void
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spu_kill (void)
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spu_kill (void)
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{
|
{
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ptrace (PTRACE_KILL, current_tid, 0, 0);
|
ptrace (PTRACE_KILL, current_tid, 0, 0);
|
}
|
}
|
|
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/* Detach from inferior process. */
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/* Detach from inferior process. */
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static int
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static int
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spu_detach (void)
|
spu_detach (void)
|
{
|
{
|
ptrace (PTRACE_DETACH, current_tid, 0, 0);
|
ptrace (PTRACE_DETACH, current_tid, 0, 0);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void
|
static void
|
spu_join (void)
|
spu_join (void)
|
{
|
{
|
int status, ret;
|
int status, ret;
|
|
|
do {
|
do {
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ret = waitpid (current_tid, &status, 0);
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ret = waitpid (current_tid, &status, 0);
|
if (WIFEXITED (status) || WIFSIGNALED (status))
|
if (WIFEXITED (status) || WIFSIGNALED (status))
|
break;
|
break;
|
} while (ret != -1 || errno != ECHILD);
|
} while (ret != -1 || errno != ECHILD);
|
}
|
}
|
|
|
/* Return nonzero if the given thread is still alive. */
|
/* Return nonzero if the given thread is still alive. */
|
static int
|
static int
|
spu_thread_alive (unsigned long tid)
|
spu_thread_alive (unsigned long tid)
|
{
|
{
|
return tid == current_tid;
|
return tid == current_tid;
|
}
|
}
|
|
|
/* Resume process. */
|
/* Resume process. */
|
static void
|
static void
|
spu_resume (struct thread_resume *resume_info)
|
spu_resume (struct thread_resume *resume_info)
|
{
|
{
|
while (resume_info->thread != -1
|
while (resume_info->thread != -1
|
&& resume_info->thread != current_tid)
|
&& resume_info->thread != current_tid)
|
resume_info++;
|
resume_info++;
|
|
|
if (resume_info->leave_stopped)
|
if (resume_info->leave_stopped)
|
return;
|
return;
|
|
|
/* We don't support hardware single-stepping right now, assume
|
/* We don't support hardware single-stepping right now, assume
|
GDB knows to use software single-stepping. */
|
GDB knows to use software single-stepping. */
|
if (resume_info->step)
|
if (resume_info->step)
|
fprintf (stderr, "Hardware single-step not supported.\n");
|
fprintf (stderr, "Hardware single-step not supported.\n");
|
|
|
regcache_invalidate ();
|
regcache_invalidate ();
|
|
|
errno = 0;
|
errno = 0;
|
ptrace (PTRACE_CONT, current_tid, 0, resume_info->sig);
|
ptrace (PTRACE_CONT, current_tid, 0, resume_info->sig);
|
if (errno)
|
if (errno)
|
perror_with_name ("ptrace");
|
perror_with_name ("ptrace");
|
}
|
}
|
|
|
/* Wait for process, returns status. */
|
/* Wait for process, returns status. */
|
static unsigned char
|
static unsigned char
|
spu_wait (char *status)
|
spu_wait (char *status)
|
{
|
{
|
int tid = current_tid;
|
int tid = current_tid;
|
int w;
|
int w;
|
int ret;
|
int ret;
|
|
|
while (1)
|
while (1)
|
{
|
{
|
ret = waitpid (tid, &w, WNOHANG | __WALL | __WNOTHREAD);
|
ret = waitpid (tid, &w, WNOHANG | __WALL | __WNOTHREAD);
|
|
|
if (ret == -1)
|
if (ret == -1)
|
{
|
{
|
if (errno != ECHILD)
|
if (errno != ECHILD)
|
perror_with_name ("waitpid");
|
perror_with_name ("waitpid");
|
}
|
}
|
else if (ret > 0)
|
else if (ret > 0)
|
break;
|
break;
|
|
|
usleep (1000);
|
usleep (1000);
|
}
|
}
|
|
|
/* On the first wait, continue running the inferior until we are
|
/* On the first wait, continue running the inferior until we are
|
blocked inside an spu_run system call. */
|
blocked inside an spu_run system call. */
|
if (!server_waiting)
|
if (!server_waiting)
|
{
|
{
|
int fd;
|
int fd;
|
CORE_ADDR addr;
|
CORE_ADDR addr;
|
|
|
while (!parse_spufs_run (&fd, &addr))
|
while (!parse_spufs_run (&fd, &addr))
|
{
|
{
|
ptrace (PT_SYSCALL, tid, (PTRACE_TYPE_ARG3) 0, 0);
|
ptrace (PT_SYSCALL, tid, (PTRACE_TYPE_ARG3) 0, 0);
|
waitpid (tid, NULL, __WALL | __WNOTHREAD);
|
waitpid (tid, NULL, __WALL | __WNOTHREAD);
|
}
|
}
|
}
|
}
|
|
|
if (WIFEXITED (w))
|
if (WIFEXITED (w))
|
{
|
{
|
fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w));
|
fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w));
|
*status = 'W';
|
*status = 'W';
|
clear_inferiors ();
|
clear_inferiors ();
|
return ((unsigned char) WEXITSTATUS (w));
|
return ((unsigned char) WEXITSTATUS (w));
|
}
|
}
|
else if (!WIFSTOPPED (w))
|
else if (!WIFSTOPPED (w))
|
{
|
{
|
fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w));
|
fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w));
|
*status = 'X';
|
*status = 'X';
|
clear_inferiors ();
|
clear_inferiors ();
|
return ((unsigned char) WTERMSIG (w));
|
return ((unsigned char) WTERMSIG (w));
|
}
|
}
|
|
|
/* After attach, we may have received a SIGSTOP. Do not return this
|
/* After attach, we may have received a SIGSTOP. Do not return this
|
as signal to GDB, or else it will try to continue with SIGSTOP ... */
|
as signal to GDB, or else it will try to continue with SIGSTOP ... */
|
if (!server_waiting)
|
if (!server_waiting)
|
{
|
{
|
*status = 'T';
|
*status = 'T';
|
return 0;
|
return 0;
|
}
|
}
|
|
|
*status = 'T';
|
*status = 'T';
|
return ((unsigned char) WSTOPSIG (w));
|
return ((unsigned char) WSTOPSIG (w));
|
}
|
}
|
|
|
/* Fetch inferior registers. */
|
/* Fetch inferior registers. */
|
static void
|
static void
|
spu_fetch_registers (int regno)
|
spu_fetch_registers (int regno)
|
{
|
{
|
int fd;
|
int fd;
|
CORE_ADDR addr;
|
CORE_ADDR addr;
|
|
|
/* ??? Some callers use 0 to mean all registers. */
|
/* ??? Some callers use 0 to mean all registers. */
|
if (regno == 0)
|
if (regno == 0)
|
regno = -1;
|
regno = -1;
|
|
|
/* We must be stopped on a spu_run system call. */
|
/* We must be stopped on a spu_run system call. */
|
if (!parse_spufs_run (&fd, &addr))
|
if (!parse_spufs_run (&fd, &addr))
|
return;
|
return;
|
|
|
/* The ID register holds the spufs file handle. */
|
/* The ID register holds the spufs file handle. */
|
if (regno == -1 || regno == SPU_ID_REGNUM)
|
if (regno == -1 || regno == SPU_ID_REGNUM)
|
supply_register (SPU_ID_REGNUM, (char *)&fd);
|
supply_register (SPU_ID_REGNUM, (char *)&fd);
|
|
|
/* The NPC register is found at ADDR. */
|
/* The NPC register is found at ADDR. */
|
if (regno == -1 || regno == SPU_PC_REGNUM)
|
if (regno == -1 || regno == SPU_PC_REGNUM)
|
{
|
{
|
char buf[4];
|
char buf[4];
|
if (fetch_ppc_memory (addr, buf, 4) == 0)
|
if (fetch_ppc_memory (addr, buf, 4) == 0)
|
supply_register (SPU_PC_REGNUM, buf);
|
supply_register (SPU_PC_REGNUM, buf);
|
}
|
}
|
|
|
/* The GPRs are found in the "regs" spufs file. */
|
/* The GPRs are found in the "regs" spufs file. */
|
if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS))
|
if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS))
|
{
|
{
|
unsigned char buf[16*SPU_NUM_CORE_REGS];
|
unsigned char buf[16*SPU_NUM_CORE_REGS];
|
char annex[32];
|
char annex[32];
|
int i;
|
int i;
|
|
|
sprintf (annex, "%d/regs", fd);
|
sprintf (annex, "%d/regs", fd);
|
if (spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf) == sizeof buf)
|
if (spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf) == sizeof buf)
|
for (i = 0; i < SPU_NUM_CORE_REGS; i++)
|
for (i = 0; i < SPU_NUM_CORE_REGS; i++)
|
supply_register (i, buf + i*16);
|
supply_register (i, buf + i*16);
|
}
|
}
|
}
|
}
|
|
|
/* Store inferior registers. */
|
/* Store inferior registers. */
|
static void
|
static void
|
spu_store_registers (int regno)
|
spu_store_registers (int regno)
|
{
|
{
|
int fd;
|
int fd;
|
CORE_ADDR addr;
|
CORE_ADDR addr;
|
|
|
/* ??? Some callers use 0 to mean all registers. */
|
/* ??? Some callers use 0 to mean all registers. */
|
if (regno == 0)
|
if (regno == 0)
|
regno = -1;
|
regno = -1;
|
|
|
/* We must be stopped on a spu_run system call. */
|
/* We must be stopped on a spu_run system call. */
|
if (!parse_spufs_run (&fd, &addr))
|
if (!parse_spufs_run (&fd, &addr))
|
return;
|
return;
|
|
|
/* The NPC register is found at ADDR. */
|
/* The NPC register is found at ADDR. */
|
if (regno == -1 || regno == SPU_PC_REGNUM)
|
if (regno == -1 || regno == SPU_PC_REGNUM)
|
{
|
{
|
char buf[4];
|
char buf[4];
|
collect_register (SPU_PC_REGNUM, buf);
|
collect_register (SPU_PC_REGNUM, buf);
|
store_ppc_memory (addr, buf, 4);
|
store_ppc_memory (addr, buf, 4);
|
}
|
}
|
|
|
/* The GPRs are found in the "regs" spufs file. */
|
/* The GPRs are found in the "regs" spufs file. */
|
if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS))
|
if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS))
|
{
|
{
|
unsigned char buf[16*SPU_NUM_CORE_REGS];
|
unsigned char buf[16*SPU_NUM_CORE_REGS];
|
char annex[32];
|
char annex[32];
|
int i;
|
int i;
|
|
|
for (i = 0; i < SPU_NUM_CORE_REGS; i++)
|
for (i = 0; i < SPU_NUM_CORE_REGS; i++)
|
collect_register (i, buf + i*16);
|
collect_register (i, buf + i*16);
|
|
|
sprintf (annex, "%d/regs", fd);
|
sprintf (annex, "%d/regs", fd);
|
spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf);
|
spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf);
|
}
|
}
|
}
|
}
|
|
|
/* Copy LEN bytes from inferior's memory starting at MEMADDR
|
/* Copy LEN bytes from inferior's memory starting at MEMADDR
|
to debugger memory starting at MYADDR. */
|
to debugger memory starting at MYADDR. */
|
static int
|
static int
|
spu_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
|
spu_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
|
{
|
{
|
int fd, ret;
|
int fd, ret;
|
CORE_ADDR addr;
|
CORE_ADDR addr;
|
char annex[32];
|
char annex[32];
|
|
|
/* We must be stopped on a spu_run system call. */
|
/* We must be stopped on a spu_run system call. */
|
if (!parse_spufs_run (&fd, &addr))
|
if (!parse_spufs_run (&fd, &addr))
|
return 0;
|
return 0;
|
|
|
/* Use the "mem" spufs file to access SPU local store. */
|
/* Use the "mem" spufs file to access SPU local store. */
|
sprintf (annex, "%d/mem", fd);
|
sprintf (annex, "%d/mem", fd);
|
ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr, len);
|
ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr, len);
|
return ret == len ? 0 : EIO;
|
return ret == len ? 0 : EIO;
|
}
|
}
|
|
|
/* Copy LEN bytes of data from debugger memory at MYADDR
|
/* Copy LEN bytes of data from debugger memory at MYADDR
|
to inferior's memory at MEMADDR.
|
to inferior's memory at MEMADDR.
|
On failure (cannot write the inferior)
|
On failure (cannot write the inferior)
|
returns the value of errno. */
|
returns the value of errno. */
|
static int
|
static int
|
spu_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
|
spu_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
|
{
|
{
|
int fd, ret;
|
int fd, ret;
|
CORE_ADDR addr;
|
CORE_ADDR addr;
|
char annex[32];
|
char annex[32];
|
|
|
/* We must be stopped on a spu_run system call. */
|
/* We must be stopped on a spu_run system call. */
|
if (!parse_spufs_run (&fd, &addr))
|
if (!parse_spufs_run (&fd, &addr))
|
return 0;
|
return 0;
|
|
|
/* Use the "mem" spufs file to access SPU local store. */
|
/* Use the "mem" spufs file to access SPU local store. */
|
sprintf (annex, "%d/mem", fd);
|
sprintf (annex, "%d/mem", fd);
|
ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr, len);
|
ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr, len);
|
return ret == len ? 0 : EIO;
|
return ret == len ? 0 : EIO;
|
}
|
}
|
|
|
/* Look up special symbols -- unneded here. */
|
/* Look up special symbols -- unneded here. */
|
static void
|
static void
|
spu_look_up_symbols (void)
|
spu_look_up_symbols (void)
|
{
|
{
|
}
|
}
|
|
|
/* Send signal to inferior. */
|
/* Send signal to inferior. */
|
static void
|
static void
|
spu_request_interrupt (void)
|
spu_request_interrupt (void)
|
{
|
{
|
syscall (SYS_tkill, current_tid, SIGINT);
|
syscall (SYS_tkill, current_tid, SIGINT);
|
}
|
}
|
|
|
static const char *
|
static const char *
|
spu_arch_string (void)
|
spu_arch_string (void)
|
{
|
{
|
return "spu";
|
return "spu";
|
}
|
}
|
|
|
static struct target_ops spu_target_ops = {
|
static struct target_ops spu_target_ops = {
|
spu_create_inferior,
|
spu_create_inferior,
|
spu_attach,
|
spu_attach,
|
spu_kill,
|
spu_kill,
|
spu_detach,
|
spu_detach,
|
spu_join,
|
spu_join,
|
spu_thread_alive,
|
spu_thread_alive,
|
spu_resume,
|
spu_resume,
|
spu_wait,
|
spu_wait,
|
spu_fetch_registers,
|
spu_fetch_registers,
|
spu_store_registers,
|
spu_store_registers,
|
spu_read_memory,
|
spu_read_memory,
|
spu_write_memory,
|
spu_write_memory,
|
spu_look_up_symbols,
|
spu_look_up_symbols,
|
spu_request_interrupt,
|
spu_request_interrupt,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
spu_arch_string,
|
spu_arch_string,
|
spu_proc_xfer_spu,
|
spu_proc_xfer_spu,
|
hostio_last_error_from_errno,
|
hostio_last_error_from_errno,
|
};
|
};
|
|
|
void
|
void
|
initialize_low (void)
|
initialize_low (void)
|
{
|
{
|
static const unsigned char breakpoint[] = { 0x00, 0x00, 0x3f, 0xff };
|
static const unsigned char breakpoint[] = { 0x00, 0x00, 0x3f, 0xff };
|
|
|
set_target_ops (&spu_target_ops);
|
set_target_ops (&spu_target_ops);
|
set_breakpoint_data (breakpoint, sizeof breakpoint);
|
set_breakpoint_data (breakpoint, sizeof breakpoint);
|
init_registers ();
|
init_registers ();
|
}
|
}
|
|
|
