/* Native-dependent code for AMD64 BSD's. Copyright (C) 2003-2020 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 "defs.h" #include "inferior.h" #include "regcache.h" #include "target.h" /* We include <signal.h> to make sure `struct fxsave64' is defined on NetBSD, since NetBSD's <machine/reg.h> needs it. */ #include <signal.h> #include <sys/types.h> #include <sys/ptrace.h> #include <machine/reg.h> #include "amd64-tdep.h" #include "amd64-nat.h" #include "x86-bsd-nat.h" #include "inf-ptrace.h" #include "amd64-bsd-nat.h" static PTRACE_TYPE_RET gdb_ptrace (PTRACE_TYPE_ARG1 request, ptid_t ptid, PTRACE_TYPE_ARG3 addr, PTRACE_TYPE_ARG4 data) { #ifdef __NetBSD__ gdb_assert (data == 0); /* Support for NetBSD threads: unlike other ptrace implementations in this file, NetBSD requires that we pass both the pid and lwp. */ return ptrace (request, ptid.pid (), addr, ptid.lwp ()); #else pid_t pid = get_ptrace_pid (ptid); return ptrace (request, pid, addr, data); #endif } /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this for all registers (including the floating-point registers). */ void amd64bsd_fetch_inferior_registers (struct regcache *regcache, int regnum) { struct gdbarch *gdbarch = regcache->arch (); ptid_t ptid = regcache->ptid (); #if defined(PT_GETFSBASE) || defined(PT_GETGSBASE) const struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); #endif if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) { struct reg regs; if (gdb_ptrace (PT_GETREGS, ptid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) perror_with_name (_("Couldn't get registers")); amd64_supply_native_gregset (regcache, ®s, -1); if (regnum != -1) return; } #ifdef PT_GETFSBASE if (regnum == -1 || regnum == tdep->fsbase_regnum) { register_t base; if (gdb_ptrace (PT_GETFSBASE, ptid, (PTRACE_TYPE_ARG3) &base, 0) == -1) perror_with_name (_("Couldn't get segment register fs_base")); regcache->raw_supply (tdep->fsbase_regnum, &base); if (regnum != -1) return; } #endif #ifdef PT_GETGSBASE if (regnum == -1 || regnum == tdep->fsbase_regnum + 1) { register_t base; if (gdb_ptrace (PT_GETGSBASE, ptid, (PTRACE_TYPE_ARG3) &base, 0) == -1) perror_with_name (_("Couldn't get segment register gs_base")); regcache->raw_supply (tdep->fsbase_regnum + 1, &base); if (regnum != -1) return; } #endif if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) { struct fpreg fpregs; #ifdef PT_GETXSTATE_INFO void *xstateregs; if (x86bsd_xsave_len != 0) { xstateregs = alloca (x86bsd_xsave_len); if (gdb_ptrace (PT_GETXSTATE, ptid, (PTRACE_TYPE_ARG3) xstateregs, 0) == -1) perror_with_name (_("Couldn't get extended state status")); amd64_supply_xsave (regcache, -1, xstateregs); return; } #endif if (gdb_ptrace (PT_GETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) perror_with_name (_("Couldn't get floating point status")); amd64_supply_fxsave (regcache, -1, &fpregs); } } /* Store register REGNUM back into the inferior. If REGNUM is -1, do this for all registers (including the floating-point registers). */ void amd64bsd_store_inferior_registers (struct regcache *regcache, int regnum) { struct gdbarch *gdbarch = regcache->arch (); ptid_t ptid = regcache->ptid (); #if defined(PT_SETFSBASE) || defined(PT_SETGSBASE) const struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); #endif if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) { struct reg regs; if (gdb_ptrace (PT_GETREGS, ptid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) perror_with_name (_("Couldn't get registers")); amd64_collect_native_gregset (regcache, ®s, regnum); if (gdb_ptrace (PT_SETREGS, ptid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) perror_with_name (_("Couldn't write registers")); if (regnum != -1) return; } #ifdef PT_SETFSBASE if (regnum == -1 || regnum == tdep->fsbase_regnum) { register_t base; /* Clear the full base value to support 32-bit targets. */ base = 0; regcache->raw_collect (tdep->fsbase_regnum, &base); if (gdb_ptrace (PT_SETFSBASE, ptid, (PTRACE_TYPE_ARG3) &base, 0) == -1) perror_with_name (_("Couldn't write segment register fs_base")); if (regnum != -1) return; } #endif #ifdef PT_SETGSBASE if (regnum == -1 || regnum == tdep->fsbase_regnum + 1) { register_t base; /* Clear the full base value to support 32-bit targets. */ base = 0; regcache->raw_collect (tdep->fsbase_regnum + 1, &base); if (gdb_ptrace (PT_SETGSBASE, ptid, (PTRACE_TYPE_ARG3) &base, 0) == -1) perror_with_name (_("Couldn't write segment register gs_base")); if (regnum != -1) return; } #endif if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) { struct fpreg fpregs; #ifdef PT_GETXSTATE_INFO void *xstateregs; if (x86bsd_xsave_len != 0) { xstateregs = alloca (x86bsd_xsave_len); if (gdb_ptrace (PT_GETXSTATE, ptid, (PTRACE_TYPE_ARG3) xstateregs, 0) == -1) perror_with_name (_("Couldn't get extended state status")); amd64_collect_xsave (regcache, regnum, xstateregs, 0); if (gdb_ptrace (PT_SETXSTATE, ptid, (PTRACE_TYPE_ARG3) xstateregs, x86bsd_xsave_len) == -1) perror_with_name (_("Couldn't write extended state status")); return; } #endif if (gdb_ptrace (PT_GETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) perror_with_name (_("Couldn't get floating point status")); amd64_collect_fxsave (regcache, regnum, &fpregs); if (gdb_ptrace (PT_SETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) perror_with_name (_("Couldn't write floating point status")); } }