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05f13b9c26
* ppc-linux-nat.c: Update copyright. (fetch_register, store_register): Add tid parameter, don't compute tid here. (fetch_ppc_registers, store_ppc_registers): Add tid parameter. Pass it along to callees. (fetch_inferior_registers, store_inferior_registers): Compute tid here, and pass it to calleed functions. (fill_gregset, supply_fpregset): Clean up formatting.
304 lines
8.8 KiB
C
304 lines
8.8 KiB
C
/* PPC linux native support.
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Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002
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Free Software Foundation, Inc.
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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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "frame.h"
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#include "inferior.h"
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#include "gdbcore.h"
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#include "regcache.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <signal.h>
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#include <sys/user.h>
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#include <sys/ioctl.h>
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#include <sys/wait.h>
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#include <fcntl.h>
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#include <sys/procfs.h>
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#include <sys/ptrace.h>
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/* Prototypes for supply_gregset etc. */
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#include "gregset.h"
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#include "ppc-tdep.h"
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#ifndef PT_READ_U
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#define PT_READ_U PTRACE_PEEKUSR
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#endif
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#ifndef PT_WRITE_U
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#define PT_WRITE_U PTRACE_POKEUSR
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#endif
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/* Default the type of the ptrace transfer to int. */
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#ifndef PTRACE_XFER_TYPE
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#define PTRACE_XFER_TYPE int
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#endif
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int
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kernel_u_size (void)
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{
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return (sizeof (struct user));
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}
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/* *INDENT-OFF* */
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/* registers layout, as presented by the ptrace interface:
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PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
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PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_R13, PT_R14, PT_R15,
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PT_R16, PT_R17, PT_R18, PT_R19, PT_R20, PT_R21, PT_R22, PT_R23,
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PT_R24, PT_R25, PT_R26, PT_R27, PT_R28, PT_R29, PT_R30, PT_R31,
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PT_FPR0, PT_FPR0 + 2, PT_FPR0 + 4, PT_FPR0 + 6, PT_FPR0 + 8, PT_FPR0 + 10, PT_FPR0 + 12, PT_FPR0 + 14,
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PT_FPR0 + 16, PT_FPR0 + 18, PT_FPR0 + 20, PT_FPR0 + 22, PT_FPR0 + 24, PT_FPR0 + 26, PT_FPR0 + 28, PT_FPR0 + 30,
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PT_FPR0 + 32, PT_FPR0 + 34, PT_FPR0 + 36, PT_FPR0 + 38, PT_FPR0 + 40, PT_FPR0 + 42, PT_FPR0 + 44, PT_FPR0 + 46,
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PT_FPR0 + 48, PT_FPR0 + 50, PT_FPR0 + 52, PT_FPR0 + 54, PT_FPR0 + 56, PT_FPR0 + 58, PT_FPR0 + 60, PT_FPR0 + 62,
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PT_NIP, PT_MSR, PT_CCR, PT_LNK, PT_CTR, PT_XER, PT_MQ */
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/* *INDENT_ON * */
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static int
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ppc_register_u_addr (int regno)
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{
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int u_addr = -1;
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struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
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/* General purpose registers occupy 1 slot each in the buffer */
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if (regno >= tdep->ppc_gp0_regnum && regno <= tdep->ppc_gplast_regnum )
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u_addr = ((PT_R0 + regno) * 4);
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/* Floating point regs: 2 slots each */
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if (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM)
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u_addr = ((PT_FPR0 + (regno - FP0_REGNUM) * 2) * 4);
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/* UISA special purpose registers: 1 slot each */
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if (regno == PC_REGNUM)
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u_addr = PT_NIP * 4;
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if (regno == tdep->ppc_lr_regnum)
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u_addr = PT_LNK * 4;
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if (regno == tdep->ppc_cr_regnum)
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u_addr = PT_CCR * 4;
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if (regno == tdep->ppc_xer_regnum)
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u_addr = PT_XER * 4;
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if (regno == tdep->ppc_ctr_regnum)
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u_addr = PT_CTR * 4;
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if (regno == tdep->ppc_mq_regnum)
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u_addr = PT_MQ * 4;
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if (regno == tdep->ppc_ps_regnum)
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u_addr = PT_MSR * 4;
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return u_addr;
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}
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static int
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ppc_ptrace_cannot_fetch_store_register (int regno)
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{
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return (ppc_register_u_addr (regno) == -1);
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}
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static void
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fetch_register (int tid, int regno)
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{
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/* This isn't really an address. But ptrace thinks of it as one. */
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char mess[128]; /* For messages */
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register int i;
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unsigned int offset; /* Offset of registers within the u area. */
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char *buf = alloca (MAX_REGISTER_RAW_SIZE);
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CORE_ADDR regaddr = ppc_register_u_addr (regno);
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if (regaddr == -1)
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{
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memset (buf, '\0', REGISTER_RAW_SIZE (regno)); /* Supply zeroes */
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supply_register (regno, buf);
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return;
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}
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
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{
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errno = 0;
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*(PTRACE_XFER_TYPE *) & buf[i] = ptrace (PT_READ_U, tid,
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(PTRACE_ARG3_TYPE) regaddr, 0);
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regaddr += sizeof (PTRACE_XFER_TYPE);
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if (errno != 0)
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{
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sprintf (mess, "reading register %s (#%d)",
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REGISTER_NAME (regno), regno);
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perror_with_name (mess);
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}
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}
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supply_register (regno, buf);
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}
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static void
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fetch_ppc_registers (int tid)
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{
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int i;
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int last_register = gdbarch_tdep (current_gdbarch)->ppc_mq_regnum;
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for (i = 0; i <= last_register; i++)
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fetch_register (tid, i);
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}
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/* Fetch registers from the child process. Fetch all registers if
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regno == -1, otherwise fetch all general registers or all floating
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point registers depending upon the value of regno. */
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void
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fetch_inferior_registers (int regno)
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{
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/* Overload thread id onto process id */
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int tid = TIDGET (inferior_ptid);
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/* No thread id, just use process id */
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if (tid == 0)
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tid = PIDGET (inferior_ptid);
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if (regno == -1)
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fetch_ppc_registers (tid);
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else
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fetch_register (tid, regno);
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}
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/* Store one register. */
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static void
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store_register (int tid, int regno)
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{
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/* This isn't really an address. But ptrace thinks of it as one. */
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CORE_ADDR regaddr = ppc_register_u_addr (regno);
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char mess[128]; /* For messages */
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register int i;
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unsigned int offset; /* Offset of registers within the u area. */
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char *buf = alloca (MAX_REGISTER_RAW_SIZE);
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if (regaddr == -1)
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{
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return;
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}
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regcache_collect (regno, buf);
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
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{
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errno = 0;
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ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) regaddr,
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*(PTRACE_XFER_TYPE *) & buf[i]);
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regaddr += sizeof (PTRACE_XFER_TYPE);
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if (errno != 0)
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{
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sprintf (mess, "writing register %s (#%d)",
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REGISTER_NAME (regno), regno);
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perror_with_name (mess);
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}
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}
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}
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static void
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store_ppc_registers (int tid)
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{
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int i;
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int last_register = gdbarch_tdep (current_gdbarch)->ppc_mq_regnum;
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for (i = 0; i <= last_register; i++)
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store_register (tid, i);
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}
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void
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store_inferior_registers (int regno)
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{
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/* Overload thread id onto process id */
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int tid = TIDGET (inferior_ptid);
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/* No thread id, just use process id */
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if (tid == 0)
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tid = PIDGET (inferior_ptid);
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if (regno >= 0)
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store_register (tid, regno);
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else
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store_ppc_registers (tid);
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}
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void
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supply_gregset (gdb_gregset_t *gregsetp)
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{
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int regi;
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register elf_greg_t *regp = (elf_greg_t *) gregsetp;
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struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
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for (regi = 0; regi < 32; regi++)
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supply_register (regi, (char *) (regp + regi));
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supply_register (PC_REGNUM, (char *) (regp + PT_NIP));
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supply_register (tdep->ppc_lr_regnum, (char *) (regp + PT_LNK));
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supply_register (tdep->ppc_cr_regnum, (char *) (regp + PT_CCR));
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supply_register (tdep->ppc_xer_regnum, (char *) (regp + PT_XER));
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supply_register (tdep->ppc_ctr_regnum, (char *) (regp + PT_CTR));
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supply_register (tdep->ppc_mq_regnum, (char *) (regp + PT_MQ));
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supply_register (tdep->ppc_ps_regnum, (char *) (regp + PT_MSR));
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}
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void
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fill_gregset (gdb_gregset_t *gregsetp, int regno)
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{
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int regi;
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elf_greg_t *regp = (elf_greg_t *) gregsetp;
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struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
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for (regi = 0; regi < 32; regi++)
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{
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if ((regno == -1) || regno == regi)
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regcache_collect (regi, regp + PT_R0 + regi);
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}
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if ((regno == -1) || regno == PC_REGNUM)
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regcache_collect (PC_REGNUM, regp + PT_NIP);
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if ((regno == -1) || regno == tdep->ppc_lr_regnum)
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regcache_collect (tdep->ppc_lr_regnum, regp + PT_LNK);
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if ((regno == -1) || regno == tdep->ppc_cr_regnum)
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regcache_collect (tdep->ppc_cr_regnum, regp + PT_CCR);
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if ((regno == -1) || regno == tdep->ppc_xer_regnum)
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regcache_collect (tdep->ppc_xer_regnum, regp + PT_XER);
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if ((regno == -1) || regno == tdep->ppc_ctr_regnum)
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regcache_collect (tdep->ppc_ctr_regnum, regp + PT_CTR);
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if ((regno == -1) || regno == tdep->ppc_mq_regnum)
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regcache_collect (tdep->ppc_mq_regnum, regp + PT_MQ);
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if ((regno == -1) || regno == tdep->ppc_ps_regnum)
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regcache_collect (tdep->ppc_ps_regnum, regp + PT_MSR);
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}
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void
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supply_fpregset (gdb_fpregset_t * fpregsetp)
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{
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int regi;
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for (regi = 0; regi < 32; regi++)
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supply_register (FP0_REGNUM + regi, (char *) (*fpregsetp + regi));
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}
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/* Given a pointer to a floating point register set in /proc format
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(fpregset_t *), update the register specified by REGNO from gdb's idea
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of the current floating point register set. If REGNO is -1, update
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them all. */
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void
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fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
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{
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int regi;
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for (regi = 0; regi < 32; regi++)
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{
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if ((regno == -1) || (regno == FP0_REGNUM + regi))
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regcache_collect (FP0_REGNUM + regi, (char *) (*fpregsetp + regi));
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}
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}
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