mirror of
https://sourceware.org/git/binutils-gdb.git
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7eedccfa2a
* solib.c (symbol_add_stub): New FLAGS parameter. (solib_read_symbols): FROM_TTY -> FLAGS, call symbol_add_stub directly. (solib_add): Defer breakpoint_re_set until after all solibs. * bsd-uthread.c (bsd_uthread_solib_loaded): Adjust. * rs6000-nat.c (objfile_symbol_add): Adjust. * symfile.c (syms_from_objfile): Merge parameters into ADD_FLAGS. (new_symfile_objfile): Likewise. (symbol_file_add_with_addrs_or_offsets): Likewise. (symbol_file_add_from_bfd): Likewise. (symbol_file_add): Likewise. * symfile.h (enum symfile_add_flags): New. Adjust prototypes. * symfile-mem.c (symbol_file_add_from_memory): Adjust. * windows-nat.c (safe_symbol_file_add_stub): Adjust. * machoread.c (macho_oso_symfile, macho_symfile_read): Adjust.
604 lines
16 KiB
C
604 lines
16 KiB
C
/* SPU native-dependent code for GDB, the GNU debugger.
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Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
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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 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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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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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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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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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdbcore.h"
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#include "gdb_string.h"
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#include "target.h"
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#include "inferior.h"
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#include "inf-ptrace.h"
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#include "regcache.h"
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#include "symfile.h"
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#include "gdb_wait.h"
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#include "gdbthread.h"
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#include <sys/ptrace.h>
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#include <asm/ptrace.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include "spu-tdep.h"
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/* PPU side system calls. */
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#define INSTR_SC 0x44000002
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#define NR_spu_run 0x0116
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/* Fetch PPU register REGNO. */
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static ULONGEST
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fetch_ppc_register (int regno)
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{
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PTRACE_TYPE_RET res;
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int tid = TIDGET (inferior_ptid);
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if (tid == 0)
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tid = PIDGET (inferior_ptid);
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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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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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just fall through to the regular ptrace call in that case. */
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{
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gdb_byte buf[8];
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errno = 0;
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ptrace (PPC_PTRACE_PEEKUSR_3264, tid,
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(PTRACE_TYPE_ARG3) (regno * 8), buf);
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if (errno == 0)
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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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if (errno == 0)
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return (ULONGEST) *(uint64_t *)buf;
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}
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#endif
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errno = 0;
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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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if (errno != 0)
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{
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char mess[128];
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xsnprintf (mess, sizeof mess, "reading PPC register #%d", regno);
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perror_with_name (_(mess));
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}
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return (ULONGEST) (unsigned long) res;
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}
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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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fetch_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET *word)
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{
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errno = 0;
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#ifndef __powerpc64__
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if (memaddr >> 32)
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{
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uint64_t addr_8 = (uint64_t) memaddr;
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ptrace (PPC_PTRACE_PEEKTEXT_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word);
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}
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else
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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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return errno;
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}
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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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store_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET word)
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{
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errno = 0;
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#ifndef __powerpc64__
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if (memaddr >> 32)
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{
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uint64_t addr_8 = (uint64_t) memaddr;
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ptrace (PPC_PTRACE_POKEDATA_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word);
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}
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else
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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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return errno;
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}
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/* Fetch LEN bytes of PPU memory at MEMADDR to MYADDR. */
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static int
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fetch_ppc_memory (ULONGEST memaddr, gdb_byte *myaddr, int len)
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{
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int i, ret;
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ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
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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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PTRACE_TYPE_RET *buffer;
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int tid = TIDGET (inferior_ptid);
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if (tid == 0)
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tid = PIDGET (inferior_ptid);
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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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{
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ret = fetch_ppc_memory_1 (tid, addr, &buffer[i]);
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if (ret)
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return ret;
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}
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memcpy (myaddr,
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(char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
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len);
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return 0;
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}
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/* Store LEN bytes from MYADDR to PPU memory at MEMADDR. */
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static int
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store_ppc_memory (ULONGEST memaddr, const gdb_byte *myaddr, int len)
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{
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int i, ret;
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ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
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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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PTRACE_TYPE_RET *buffer;
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int tid = TIDGET (inferior_ptid);
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if (tid == 0)
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tid = PIDGET (inferior_ptid);
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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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{
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ret = fetch_ppc_memory_1 (tid, addr, &buffer[0]);
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if (ret)
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return ret;
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}
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if (count > 1)
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{
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ret = fetch_ppc_memory_1 (tid, addr + (count - 1)
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* sizeof (PTRACE_TYPE_RET),
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&buffer[count - 1]);
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if (ret)
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return ret;
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}
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memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
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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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{
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ret = store_ppc_memory_1 (tid, addr, buffer[i]);
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if (ret)
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return ret;
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}
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return 0;
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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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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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static int
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parse_spufs_run (int *fd, ULONGEST *addr)
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{
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gdb_byte buf[4];
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ULONGEST pc = fetch_ppc_register (32); /* 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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return 0;
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/* It should be a "sc" instruction. */
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if (extract_unsigned_integer (buf, 4) != INSTR_SC)
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return 0;
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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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return 0;
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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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*addr = fetch_ppc_register (4);
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return 1;
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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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using the /proc file system. */
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static LONGEST
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spu_proc_xfer_spu (const char *annex, gdb_byte *readbuf,
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const gdb_byte *writebuf,
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ULONGEST offset, LONGEST len)
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{
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char buf[128];
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int fd = 0;
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int ret = -1;
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int pid = PIDGET (inferior_ptid);
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if (!annex)
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return 0;
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xsnprintf (buf, sizeof buf, "/proc/%d/fd/%s", pid, annex);
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fd = open (buf, writebuf? O_WRONLY : O_RDONLY);
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if (fd <= 0)
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return -1;
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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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{
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close (fd);
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return 0;
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}
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if (writebuf)
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ret = write (fd, writebuf, (size_t) len);
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else if (readbuf)
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ret = read (fd, readbuf, (size_t) len);
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close (fd);
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return ret;
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}
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/* Inferior memory should contain an SPE executable image at location ADDR.
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Allocate a BFD representing that executable. Return NULL on error. */
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static void *
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spu_bfd_iovec_open (struct bfd *nbfd, void *open_closure)
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{
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return open_closure;
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}
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static int
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spu_bfd_iovec_close (struct bfd *nbfd, void *stream)
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{
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xfree (stream);
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return 1;
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}
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static file_ptr
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spu_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
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file_ptr nbytes, file_ptr offset)
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{
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ULONGEST addr = *(ULONGEST *)stream;
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if (fetch_ppc_memory (addr + offset, buf, nbytes) != 0)
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{
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bfd_set_error (bfd_error_invalid_operation);
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return -1;
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}
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return nbytes;
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}
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static int
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spu_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
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{
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/* We don't have an easy way of finding the size of embedded spu
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images. We could parse the in-memory ELF header and section
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table to find the extent of the last section but that seems
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pointless when the size is needed only for checks of other
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parsed values in dbxread.c. */
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sb->st_size = INT_MAX;
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return 0;
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}
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static bfd *
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spu_bfd_open (ULONGEST addr)
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{
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struct bfd *nbfd;
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asection *spu_name;
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ULONGEST *open_closure = xmalloc (sizeof (ULONGEST));
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*open_closure = addr;
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nbfd = bfd_openr_iovec (xstrdup ("<in-memory>"), "elf32-spu",
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spu_bfd_iovec_open, open_closure,
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spu_bfd_iovec_pread, spu_bfd_iovec_close,
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spu_bfd_iovec_stat);
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if (!nbfd)
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return NULL;
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if (!bfd_check_format (nbfd, bfd_object))
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{
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bfd_close (nbfd);
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return NULL;
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}
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/* Retrieve SPU name note and update BFD name. */
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spu_name = bfd_get_section_by_name (nbfd, ".note.spu_name");
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if (spu_name)
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{
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int sect_size = bfd_section_size (nbfd, spu_name);
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if (sect_size > 20)
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{
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char *buf = alloca (sect_size - 20 + 1);
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bfd_get_section_contents (nbfd, spu_name, buf, 20, sect_size - 20);
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buf[sect_size - 20] = '\0';
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xfree ((char *)nbfd->filename);
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nbfd->filename = xstrdup (buf);
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}
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}
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return nbfd;
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}
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/* INFERIOR_FD is a file handle passed by the inferior to the
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spu_run system call. Assuming the SPE context was allocated
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by the libspe library, try to retrieve the main SPE executable
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file from its copy within the target process. */
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static void
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spu_symbol_file_add_from_memory (int inferior_fd)
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{
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ULONGEST addr;
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struct bfd *nbfd;
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char id[128];
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char annex[32];
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int len;
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/* Read object ID. */
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xsnprintf (annex, sizeof annex, "%d/object-id", inferior_fd);
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len = spu_proc_xfer_spu (annex, id, NULL, 0, sizeof id);
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if (len <= 0 || len >= sizeof id)
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return;
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id[len] = 0;
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addr = strtoulst (id, NULL, 16);
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if (!addr)
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return;
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/* Open BFD representing SPE executable and read its symbols. */
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nbfd = spu_bfd_open (addr);
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if (nbfd)
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symbol_file_add_from_bfd (nbfd, SYMFILE_VERBOSE | SYMFILE_MAINLINE,
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NULL, 0);
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}
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/* Override the post_startup_inferior routine to continue running
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the inferior until the first spu_run system call. */
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static void
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spu_child_post_startup_inferior (ptid_t ptid)
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{
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int fd;
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ULONGEST addr;
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int tid = TIDGET (ptid);
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if (tid == 0)
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tid = PIDGET (ptid);
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while (!parse_spufs_run (&fd, &addr))
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{
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ptrace (PT_SYSCALL, tid, (PTRACE_TYPE_ARG3) 0, 0);
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waitpid (tid, NULL, __WALL | __WNOTHREAD);
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}
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}
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/* Override the post_attach routine to try load the SPE executable
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file image from its copy inside the target process. */
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static void
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spu_child_post_attach (int pid)
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{
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int fd;
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ULONGEST addr;
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/* Like child_post_startup_inferior, if we happened to attach to
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the inferior while it wasn't currently in spu_run, continue
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running it until we get back there. */
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while (!parse_spufs_run (&fd, &addr))
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{
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ptrace (PT_SYSCALL, pid, (PTRACE_TYPE_ARG3) 0, 0);
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waitpid (pid, NULL, __WALL | __WNOTHREAD);
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}
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/* If the user has not provided an executable file, try to extract
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the image from inside the target process. */
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if (!get_exec_file (0))
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spu_symbol_file_add_from_memory (fd);
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}
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/* Wait for child PTID to do something. Return id of the child,
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minus_one_ptid in case of error; store status into *OURSTATUS. */
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static ptid_t
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spu_child_wait (struct target_ops *ops,
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ptid_t ptid, struct target_waitstatus *ourstatus, int options)
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{
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int save_errno;
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int status;
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pid_t pid;
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do
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{
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set_sigint_trap (); /* Causes SIGINT to be passed on to the
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attached process. */
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pid = waitpid (PIDGET (ptid), &status, 0);
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if (pid == -1 && errno == ECHILD)
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/* Try again with __WCLONE to check cloned processes. */
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pid = waitpid (PIDGET (ptid), &status, __WCLONE);
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save_errno = errno;
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/* Make sure we don't report an event for the exit of the
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original program, if we've detached from it. */
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if (pid != -1 && !WIFSTOPPED (status) && pid != PIDGET (inferior_ptid))
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{
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pid = -1;
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save_errno = EINTR;
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}
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clear_sigint_trap ();
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}
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while (pid == -1 && save_errno == EINTR);
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if (pid == -1)
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{
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warning (_("Child process unexpectedly missing: %s"),
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safe_strerror (save_errno));
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/* Claim it exited with unknown signal. */
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ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
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ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
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return inferior_ptid;
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}
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store_waitstatus (ourstatus, status);
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return pid_to_ptid (pid);
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}
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/* Override the fetch_inferior_register routine. */
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static void
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spu_fetch_inferior_registers (struct target_ops *ops,
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struct regcache *regcache, int regno)
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{
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int fd;
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ULONGEST addr;
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/* We must be stopped on a spu_run system call. */
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if (!parse_spufs_run (&fd, &addr))
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return;
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/* The ID register holds the spufs file handle. */
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if (regno == -1 || regno == SPU_ID_REGNUM)
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{
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char buf[4];
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store_unsigned_integer (buf, 4, fd);
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regcache_raw_supply (regcache, SPU_ID_REGNUM, buf);
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}
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/* The NPC register is found at ADDR. */
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if (regno == -1 || regno == SPU_PC_REGNUM)
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{
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gdb_byte buf[4];
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if (fetch_ppc_memory (addr, buf, 4) == 0)
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regcache_raw_supply (regcache, SPU_PC_REGNUM, buf);
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}
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/* The GPRs are found in the "regs" spufs file. */
|
|
if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS))
|
|
{
|
|
gdb_byte buf[16 * SPU_NUM_GPRS];
|
|
char annex[32];
|
|
int i;
|
|
|
|
xsnprintf (annex, sizeof annex, "%d/regs", fd);
|
|
if (spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf) == sizeof buf)
|
|
for (i = 0; i < SPU_NUM_GPRS; i++)
|
|
regcache_raw_supply (regcache, i, buf + i*16);
|
|
}
|
|
}
|
|
|
|
/* Override the store_inferior_register routine. */
|
|
static void
|
|
spu_store_inferior_registers (struct target_ops *ops,
|
|
struct regcache *regcache, int regno)
|
|
{
|
|
int fd;
|
|
ULONGEST addr;
|
|
|
|
/* We must be stopped on a spu_run system call. */
|
|
if (!parse_spufs_run (&fd, &addr))
|
|
return;
|
|
|
|
/* The NPC register is found at ADDR. */
|
|
if (regno == -1 || regno == SPU_PC_REGNUM)
|
|
{
|
|
gdb_byte buf[4];
|
|
regcache_raw_collect (regcache, SPU_PC_REGNUM, buf);
|
|
store_ppc_memory (addr, buf, 4);
|
|
}
|
|
|
|
/* The GPRs are found in the "regs" spufs file. */
|
|
if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS))
|
|
{
|
|
gdb_byte buf[16 * SPU_NUM_GPRS];
|
|
char annex[32];
|
|
int i;
|
|
|
|
for (i = 0; i < SPU_NUM_GPRS; i++)
|
|
regcache_raw_collect (regcache, i, buf + i*16);
|
|
|
|
xsnprintf (annex, sizeof annex, "%d/regs", fd);
|
|
spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf);
|
|
}
|
|
}
|
|
|
|
/* Override the to_xfer_partial routine. */
|
|
static LONGEST
|
|
spu_xfer_partial (struct target_ops *ops,
|
|
enum target_object object, const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, LONGEST len)
|
|
{
|
|
if (object == TARGET_OBJECT_SPU)
|
|
return spu_proc_xfer_spu (annex, readbuf, writebuf, offset, len);
|
|
|
|
if (object == TARGET_OBJECT_MEMORY)
|
|
{
|
|
int fd;
|
|
ULONGEST addr;
|
|
char mem_annex[32];
|
|
|
|
/* We must be stopped on a spu_run system call. */
|
|
if (!parse_spufs_run (&fd, &addr))
|
|
return 0;
|
|
|
|
/* Use the "mem" spufs file to access SPU local store. */
|
|
xsnprintf (mem_annex, sizeof mem_annex, "%d/mem", fd);
|
|
return spu_proc_xfer_spu (mem_annex, readbuf, writebuf, offset, len);
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* Override the to_can_use_hw_breakpoint routine. */
|
|
static int
|
|
spu_can_use_hw_breakpoint (int type, int cnt, int othertype)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Initialize SPU native target. */
|
|
void
|
|
_initialize_spu_nat (void)
|
|
{
|
|
/* Generic ptrace methods. */
|
|
struct target_ops *t;
|
|
t = inf_ptrace_target ();
|
|
|
|
/* Add SPU methods. */
|
|
t->to_post_attach = spu_child_post_attach;
|
|
t->to_post_startup_inferior = spu_child_post_startup_inferior;
|
|
t->to_wait = spu_child_wait;
|
|
t->to_fetch_registers = spu_fetch_inferior_registers;
|
|
t->to_store_registers = spu_store_inferior_registers;
|
|
t->to_xfer_partial = spu_xfer_partial;
|
|
t->to_can_use_hw_breakpoint = spu_can_use_hw_breakpoint;
|
|
|
|
/* Register SPU target. */
|
|
add_target (t);
|
|
}
|