X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=gdb%2Fgdbserver%2Flinux-bfin-low.c;fp=gdb%2Fgdbserver%2Flinux-bfin-low.c;h=5e5aed28d6b14f58952731b57afa6bb36c338f7a;hb=cbad6d5ba66a94967eaf14df64463a4abca700d6;hp=0000000000000000000000000000000000000000;hpb=b110964dfb2d0779466e4e604983d3afa83993a4;p=pf3gnuchains%2Fpf3gnuchains4x.git diff --git a/gdb/gdbserver/linux-bfin-low.c b/gdb/gdbserver/linux-bfin-low.c new file mode 100644 index 0000000000..5e5aed28d6 --- /dev/null +++ b/gdb/gdbserver/linux-bfin-low.c @@ -0,0 +1,106 @@ +/* GNU/Linux/BFIN specific low level interface, for the remote server for GDB. + + Copyright (C) 2005-2012 Free Software Foundation, Inc. + + Contributed by Analog Devices, 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 . */ + +#include "server.h" +#include "linux-low.h" +#include "libiberty.h" +#include + +/* Defined in auto-generated file reg-bfin.c. */ +void init_registers_bfin (void); + +static int bfin_regmap[] = +{ + PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7, + PT_P0, PT_P1, PT_P2, PT_P3, PT_P4, PT_P5, PT_USP, PT_FP, + PT_I0, PT_I1, PT_I2, PT_I3, PT_M0, PT_M1, PT_M2, PT_M3, + PT_B0, PT_B1, PT_B2, PT_B3, PT_L0, PT_L1, PT_L2, PT_L3, + PT_A0X, PT_A0W, PT_A1X, PT_A1W, PT_ASTAT, PT_RETS, + PT_LC0, PT_LT0, PT_LB0, PT_LC1, PT_LT1, PT_LB1, + -1 /* PT_CYCLES */, -1 /* PT_CYCLES2 */, + -1 /* PT_USP */, PT_SEQSTAT, PT_SYSCFG, PT_PC, PT_RETX, PT_RETN, PT_RETE, + PT_PC, +}; + +#define bfin_num_regs ARRAY_SIZE (bfin_regmap) + +static int +bfin_cannot_store_register (int regno) +{ + return (regno >= bfin_num_regs); +} + +static int +bfin_cannot_fetch_register (int regno) +{ + return (regno >= bfin_num_regs); +} + +static CORE_ADDR +bfin_get_pc (struct regcache *regcache) +{ + unsigned long pc; + + collect_register_by_name (regcache, "pc", &pc); + + return pc; +} + +static void +bfin_set_pc (struct regcache *regcache, CORE_ADDR pc) +{ + unsigned long newpc = pc; + + supply_register_by_name (regcache, "pc", &newpc); +} + +#define bfin_breakpoint_len 2 +static const unsigned char bfin_breakpoint[bfin_breakpoint_len] = {0xa1, 0x00}; + +static int +bfin_breakpoint_at (CORE_ADDR where) +{ + unsigned char insn[bfin_breakpoint_len]; + + read_inferior_memory(where, insn, bfin_breakpoint_len); + if (insn[0] == bfin_breakpoint[0] + && insn[1] == bfin_breakpoint[1]) + return 1; + + /* If necessary, recognize more trap instructions here. GDB only uses the + one. */ + return 0; +} + +struct linux_target_ops the_low_target = { + init_registers_bfin, + bfin_num_regs, + bfin_regmap, + bfin_cannot_fetch_register, + bfin_cannot_store_register, + bfin_get_pc, + bfin_set_pc, + bfin_breakpoint, + bfin_breakpoint_len, + 0, + 2, + bfin_breakpoint_at, +};