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https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [gdbserver/] [linux-xtensa-low.c] - Rev 411
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/* GNU/Linux/Xtensa specific low level interface, for the remote server for GDB. Copyright 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 <sys/ptrace.h> #include <xtensa-config.h> #include "xtensa-xtregs.c" enum regnum { R_PC=0, R_PS, R_LBEG, R_LEND, R_LCOUNT, R_SAR, R_WS, R_WB, R_A0 = 64 }; static void xtensa_fill_gregset (void *buf) { elf_greg_t* rset = (elf_greg_t*)buf; int ar0_regnum; char *ptr; int i; /* Take care of AR registers. */ ar0_regnum = find_regno ("ar0"); ptr = (char*)&rset[R_A0]; for (i = ar0_regnum; i < ar0_regnum + XCHAL_NUM_AREGS; i++) { collect_register (i, ptr); ptr += register_size(i); } /* Loop registers, if hardware has it. */ #if XCHAL_HAVE_LOOP collect_register_by_name ("lbeg", (char*)&rset[R_LBEG]); collect_register_by_name ("lend", (char*)&rset[R_LEND]); collect_register_by_name ("lcount", (char*)&rset[R_LCOUNT]); #endif collect_register_by_name ("sar", (char*)&rset[R_SAR]); collect_register_by_name ("pc", (char*)&rset[R_PC]); collect_register_by_name ("ps", (char*)&rset[R_PS]); collect_register_by_name ("windowbase", (char*)&rset[R_WB]); collect_register_by_name ("windowstart", (char*)&rset[R_WS]); } static void xtensa_store_gregset (const void *buf) { const elf_greg_t* rset = (const elf_greg_t*)buf; int ar0_regnum; char *ptr; int i; /* Take care of AR registers. */ ar0_regnum = find_regno ("ar0"); ptr = (char *)&rset[R_A0]; for (i = ar0_regnum; i < ar0_regnum + XCHAL_NUM_AREGS; i++) { supply_register (i, ptr); ptr += register_size(i); } /* Loop registers, if hardware has it. */ #if XCHAL_HAVE_LOOP supply_register_by_name ("lbeg", (char*)&rset[R_LBEG]); supply_register_by_name ("lend", (char*)&rset[R_LEND]); supply_register_by_name ("lcount", (char*)&rset[R_LCOUNT]); #endif supply_register_by_name ("sar", (char*)&rset[R_SAR]); supply_register_by_name ("pc", (char*)&rset[R_PC]); supply_register_by_name ("ps", (char*)&rset[R_PS]); supply_register_by_name ("windowbase", (char*)&rset[R_WB]); supply_register_by_name ("windowstart", (char*)&rset[R_WS]); } /* Xtensa GNU/Linux PTRACE interface includes extended register set. */ static void xtensa_fill_xtregset (void *buf) { const xtensa_regtable_t *ptr; for (ptr = xtensa_regmap_table; ptr->name; ptr++) { collect_register_by_name (ptr->name, (char*)buf + ptr->ptrace_offset); } } static void xtensa_store_xtregset (const void *buf) { const xtensa_regtable_t *ptr; for (ptr = xtensa_regmap_table; ptr->name; ptr++) { supply_register_by_name (ptr->name, (char*)buf + ptr->ptrace_offset); } } struct regset_info target_regsets[] = { { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t), GENERAL_REGS, xtensa_fill_gregset, xtensa_store_gregset }, { PTRACE_GETXTREGS, PTRACE_SETXTREGS, XTENSA_ELF_XTREG_SIZE, EXTENDED_REGS, xtensa_fill_xtregset, xtensa_store_xtregset }, { 0, 0, -1, -1, NULL, NULL } }; #if XCHAL_HAVE_BE #define XTENSA_BREAKPOINT {0xd2,0x0f} #else #define XTENSA_BREAKPOINT {0x2d,0xf0} #endif static const unsigned char xtensa_breakpoint[] = XTENSA_BREAKPOINT; #define xtensa_breakpoint_len 2 static CORE_ADDR xtensa_get_pc (void) { unsigned long pc; collect_register_by_name ("pc", &pc); return pc; } static void xtensa_set_pc (CORE_ADDR pc) { unsigned long newpc = pc; supply_register_by_name ("pc", &newpc); } static int xtensa_breakpoint_at (CORE_ADDR where) { unsigned long insn; (*the_target->read_memory) (where, (unsigned char *) &insn, xtensa_breakpoint_len); return memcmp((char *)&insn, xtensa_breakpoint, xtensa_breakpoint_len) == 0; } struct linux_target_ops the_low_target = { 0, 0, 0, 0, xtensa_get_pc, xtensa_set_pc, xtensa_breakpoint, xtensa_breakpoint_len, NULL, 0, xtensa_breakpoint_at, };
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