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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [gdbserver/] [linux-ppc-low.c] - Rev 308
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/* GNU/Linux/PowerPC specific low level interface, for the remote server for GDB. Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2005, 2007, 2008 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "server.h" #include "linux-low.h" #include <asm/ptrace.h> #define ppc_num_regs 71 /* Currently, don't check/send MQ. */ static int ppc_regmap[] = {PT_R0 * 4, PT_R1 * 4, PT_R2 * 4, PT_R3 * 4, PT_R4 * 4, PT_R5 * 4, PT_R6 * 4, PT_R7 * 4, PT_R8 * 4, PT_R9 * 4, PT_R10 * 4, PT_R11 * 4, PT_R12 * 4, PT_R13 * 4, PT_R14 * 4, PT_R15 * 4, PT_R16 * 4, PT_R17 * 4, PT_R18 * 4, PT_R19 * 4, PT_R20 * 4, PT_R21 * 4, PT_R22 * 4, PT_R23 * 4, PT_R24 * 4, PT_R25 * 4, PT_R26 * 4, PT_R27 * 4, PT_R28 * 4, PT_R29 * 4, PT_R30 * 4, PT_R31 * 4, #ifdef __SPE__ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, #else PT_FPR0*4, PT_FPR0*4 + 8, PT_FPR0*4+16, PT_FPR0*4+24, PT_FPR0*4+32, PT_FPR0*4+40, PT_FPR0*4+48, PT_FPR0*4+56, PT_FPR0*4+64, PT_FPR0*4+72, PT_FPR0*4+80, PT_FPR0*4+88, PT_FPR0*4+96, PT_FPR0*4+104, PT_FPR0*4+112, PT_FPR0*4+120, PT_FPR0*4+128, PT_FPR0*4+136, PT_FPR0*4+144, PT_FPR0*4+152, PT_FPR0*4+160, PT_FPR0*4+168, PT_FPR0*4+176, PT_FPR0*4+184, PT_FPR0*4+192, PT_FPR0*4+200, PT_FPR0*4+208, PT_FPR0*4+216, PT_FPR0*4+224, PT_FPR0*4+232, PT_FPR0*4+240, PT_FPR0*4+248, #endif PT_NIP * 4, PT_MSR * 4, PT_CCR * 4, PT_LNK * 4, #ifdef __SPE__ PT_CTR * 4, PT_XER * 4, -1 #else PT_CTR * 4, PT_XER * 4, PT_FPSCR * 4 #endif }; static int ppc_cannot_store_register (int regno) { #ifndef __SPE__ /* Some kernels do not allow us to store fpscr. */ if (regno == find_regno ("fpscr")) return 2; #endif return 0; } static int ppc_cannot_fetch_register (int regno) { return 0; } static CORE_ADDR ppc_get_pc (void) { unsigned long pc; collect_register_by_name ("pc", &pc); return (CORE_ADDR) pc; } static void ppc_set_pc (CORE_ADDR pc) { unsigned long newpc = pc; supply_register_by_name ("pc", &newpc); } /* Correct in either endianness. Note that this file is for PowerPC only, not PowerPC64. This instruction is "twge r2, r2", which GDB uses as a software breakpoint. */ static const unsigned long ppc_breakpoint = 0x7d821008; #define ppc_breakpoint_len 4 static int ppc_breakpoint_at (CORE_ADDR where) { unsigned long insn; (*the_target->read_memory) (where, (unsigned char *) &insn, 4); if (insn == ppc_breakpoint) return 1; /* If necessary, recognize more trap instructions here. GDB only uses the one. */ return 0; } /* Provide only a fill function for the general register set. ps_lgetregs will use this for NPTL support. */ static void ppc_fill_gregset (void *buf) { int i; for (i = 0; i < 32; i++) collect_register (i, (char *) buf + ppc_regmap[i]); for (i = 64; i < 70; i++) collect_register (i, (char *) buf + ppc_regmap[i]); } #ifdef __ALTIVEC__ #ifndef PTRACE_GETVRREGS #define PTRACE_GETVRREGS 18 #define PTRACE_SETVRREGS 19 #endif #define SIZEOF_VRREGS 33*16+4 static void ppc_fill_vrregset (void *buf) { int i, base; char *regset = buf; base = find_regno ("vr0"); for (i = 0; i < 32; i++) collect_register (base + i, ®set[i * 16]); collect_register_by_name ("vscr", ®set[32 * 16 + 12]); collect_register_by_name ("vrsave", ®set[33 * 16]); } static void ppc_store_vrregset (const void *buf) { int i, base; const char *regset = buf; base = find_regno ("vr0"); for (i = 0; i < 32; i++) supply_register (base + i, ®set[i * 16]); supply_register_by_name ("vscr", ®set[32 * 16 + 12]); supply_register_by_name ("vrsave", ®set[33 * 16]); } #endif /* __ALTIVEC__ */ #ifdef __SPE__ #ifndef PTRACE_GETEVRREGS #define PTRACE_GETEVRREGS 20 #define PTRACE_SETEVRREGS 21 #endif struct gdb_evrregset_t { unsigned long evr[32]; unsigned long long acc; unsigned long spefscr; }; static void ppc_fill_evrregset (void *buf) { int i, ev0; struct gdb_evrregset_t *regset = buf; ev0 = find_regno ("ev0h"); for (i = 0; i < 32; i++) collect_register (ev0 + i, ®set->evr[i]); collect_register_by_name ("acc", ®set->acc); collect_register_by_name ("spefscr", ®set->spefscr); } static void ppc_store_evrregset (const void *buf) { int i, ev0; const struct gdb_evrregset_t *regset = buf; ev0 = find_regno ("ev0h"); for (i = 0; i < 32; i++) supply_register (ev0 + i, ®set->evr[i]); supply_register_by_name ("acc", ®set->acc); supply_register_by_name ("spefscr", ®set->spefscr); } #endif /* __SPE__ */ struct regset_info target_regsets[] = { /* List the extra register sets before GENERAL_REGS. That way we will fetch them every time, but still fall back to PTRACE_PEEKUSER for the general registers. Some kernels support these, but not the newer PPC_PTRACE_GETREGS. */ #ifdef __ALTIVEC__ { PTRACE_GETVRREGS, PTRACE_SETVRREGS, SIZEOF_VRREGS, EXTENDED_REGS, ppc_fill_vrregset, ppc_store_vrregset }, #endif #ifdef __SPE__ { PTRACE_GETEVRREGS, PTRACE_SETEVRREGS, 32 * 4 + 8 + 4, EXTENDED_REGS, ppc_fill_evrregset, ppc_store_evrregset }, #endif { 0, 0, 0, GENERAL_REGS, ppc_fill_gregset, NULL }, { 0, 0, -1, -1, NULL, NULL } }; struct linux_target_ops the_low_target = { ppc_num_regs, ppc_regmap, ppc_cannot_fetch_register, ppc_cannot_store_register, ppc_get_pc, ppc_set_pc, (const unsigned char *) &ppc_breakpoint, ppc_breakpoint_len, NULL, 0, ppc_breakpoint_at, };
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