256 lines
8.3 KiB
C++
256 lines
8.3 KiB
C++
$NetBSD$
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--- gdbserver/netbsd-x86_64-low.cc.orig 2020-09-02 16:10:13.482761789 +0000
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+++ gdbserver/netbsd-x86_64-low.cc
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@@ -0,0 +1,250 @@
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+/* Copyright (C) 2020 Free Software Foundation, Inc.
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+
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+ This file is part of GDB.
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+
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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 3 of the License, or
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+ (at your option) any later version.
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+
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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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+
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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, see <http://www.gnu.org/licenses/>. */
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+
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+#include <sys/types.h>
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+#include <sys/ptrace.h>
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+#include <limits.h>
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+
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+#include "server.h"
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+#include "netbsd-low.h"
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+#include "gdbsupport/x86-xstate.h"
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+#include "arch/amd64.h"
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+#include "x86-tdesc.h"
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+#include "tdesc.h"
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+
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+static int use_xml;
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+
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+/* The index of various registers inside the regcache. */
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+
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+enum netbsd_x86_64_gdb_regnum
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+{
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+ AMD64_RAX_REGNUM, /* %rax */
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+ AMD64_RBX_REGNUM, /* %rbx */
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+ AMD64_RCX_REGNUM, /* %rcx */
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+ AMD64_RDX_REGNUM, /* %rdx */
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+ AMD64_RSI_REGNUM, /* %rsi */
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+ AMD64_RDI_REGNUM, /* %rdi */
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+ AMD64_RBP_REGNUM, /* %rbp */
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+ AMD64_RSP_REGNUM, /* %rsp */
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+ AMD64_R8_REGNUM, /* %r8 */
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+ AMD64_R9_REGNUM, /* %r9 */
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+ AMD64_R10_REGNUM, /* %r10 */
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+ AMD64_R11_REGNUM, /* %r11 */
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+ AMD64_R12_REGNUM, /* %r12 */
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+ AMD64_R13_REGNUM, /* %r13 */
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+ AMD64_R14_REGNUM, /* %r14 */
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+ AMD64_R15_REGNUM, /* %r15 */
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+ AMD64_RIP_REGNUM, /* %rip */
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+ AMD64_EFLAGS_REGNUM, /* %eflags */
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+ AMD64_CS_REGNUM, /* %cs */
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+ AMD64_SS_REGNUM, /* %ss */
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+ AMD64_DS_REGNUM, /* %ds */
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+ AMD64_ES_REGNUM, /* %es */
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+ AMD64_FS_REGNUM, /* %fs */
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+ AMD64_GS_REGNUM, /* %gs */
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+ AMD64_ST0_REGNUM = 24, /* %st0 */
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+ AMD64_ST1_REGNUM, /* %st1 */
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+ AMD64_FCTRL_REGNUM = AMD64_ST0_REGNUM + 8,
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+ AMD64_FSTAT_REGNUM = AMD64_ST0_REGNUM + 9,
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+ AMD64_FTAG_REGNUM = AMD64_ST0_REGNUM + 10,
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+ AMD64_XMM0_REGNUM = 40, /* %xmm0 */
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+ AMD64_XMM1_REGNUM, /* %xmm1 */
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+ AMD64_MXCSR_REGNUM = AMD64_XMM0_REGNUM + 16,
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+ AMD64_YMM0H_REGNUM, /* %ymm0h */
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+ AMD64_YMM15H_REGNUM = AMD64_YMM0H_REGNUM + 15,
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+ AMD64_BND0R_REGNUM = AMD64_YMM15H_REGNUM + 1,
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+ AMD64_BND3R_REGNUM = AMD64_BND0R_REGNUM + 3,
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+ AMD64_BNDCFGU_REGNUM,
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+ AMD64_BNDSTATUS_REGNUM,
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+ AMD64_XMM16_REGNUM,
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+ AMD64_XMM31_REGNUM = AMD64_XMM16_REGNUM + 15,
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+ AMD64_YMM16H_REGNUM,
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+ AMD64_YMM31H_REGNUM = AMD64_YMM16H_REGNUM + 15,
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+ AMD64_K0_REGNUM,
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+ AMD64_K7_REGNUM = AMD64_K0_REGNUM + 7,
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+ AMD64_ZMM0H_REGNUM,
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+ AMD64_ZMM31H_REGNUM = AMD64_ZMM0H_REGNUM + 31,
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+ AMD64_PKRU_REGNUM,
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+ AMD64_FSBASE_REGNUM,
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+ AMD64_GSBASE_REGNUM
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+};
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+
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+/* The fill_function for the general-purpose register set. */
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+
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+static void
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+netbsd_x86_64_fill_gregset (struct regcache *regcache, char *buf)
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+{
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+ struct reg *r = (struct reg *)buf;
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+
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+#define netbsd_x86_64_collect_gp(regnum, fld) do { \
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+ collect_register (regcache, regnum, &r->regs[_REG_##fld]); \
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+ } while (0)
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+
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+ netbsd_x86_64_collect_gp (AMD64_RAX_REGNUM, RAX);
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+ netbsd_x86_64_collect_gp (AMD64_RBX_REGNUM, RBX);
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+ netbsd_x86_64_collect_gp (AMD64_RCX_REGNUM, RCX);
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+ netbsd_x86_64_collect_gp (AMD64_RDX_REGNUM, RDX);
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+ netbsd_x86_64_collect_gp (AMD64_RSI_REGNUM, RSI);
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+ netbsd_x86_64_collect_gp (AMD64_RDI_REGNUM, RDI);
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+ netbsd_x86_64_collect_gp (AMD64_RBP_REGNUM, RBP);
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+ netbsd_x86_64_collect_gp (AMD64_RSP_REGNUM, RSP);
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+ netbsd_x86_64_collect_gp (AMD64_R8_REGNUM, R8);
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+ netbsd_x86_64_collect_gp (AMD64_R9_REGNUM, R9);
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+ netbsd_x86_64_collect_gp (AMD64_R10_REGNUM, R10);
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+ netbsd_x86_64_collect_gp (AMD64_R11_REGNUM, R11);
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+ netbsd_x86_64_collect_gp (AMD64_R12_REGNUM, R12);
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+ netbsd_x86_64_collect_gp (AMD64_R13_REGNUM, R13);
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+ netbsd_x86_64_collect_gp (AMD64_R14_REGNUM, R14);
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+ netbsd_x86_64_collect_gp (AMD64_R15_REGNUM, R15);
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+ netbsd_x86_64_collect_gp (AMD64_RIP_REGNUM, RIP);
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+ netbsd_x86_64_collect_gp (AMD64_EFLAGS_REGNUM, RFLAGS);
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+ netbsd_x86_64_collect_gp (AMD64_CS_REGNUM, CS);
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+ netbsd_x86_64_collect_gp (AMD64_SS_REGNUM, SS);
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+ netbsd_x86_64_collect_gp (AMD64_DS_REGNUM, DS);
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+ netbsd_x86_64_collect_gp (AMD64_ES_REGNUM, ES);
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+ netbsd_x86_64_collect_gp (AMD64_FS_REGNUM, FS);
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+ netbsd_x86_64_collect_gp (AMD64_GS_REGNUM, GS);
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+}
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+
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+/* The store_function for the general-purpose register set. */
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+
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+static void
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+netbsd_x86_64_store_gregset (struct regcache *regcache, const char *buf)
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+{
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+ struct reg *r = (struct reg *)buf;
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+
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+#define netbsd_x86_64_supply_gp(regnum, fld) do { \
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+ supply_register (regcache, regnum, &r->regs[_REG_##fld]); \
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+ } while(0)
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+
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+ netbsd_x86_64_supply_gp (AMD64_RAX_REGNUM, RAX);
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+ netbsd_x86_64_supply_gp (AMD64_RBX_REGNUM, RBX);
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+ netbsd_x86_64_supply_gp (AMD64_RCX_REGNUM, RCX);
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+ netbsd_x86_64_supply_gp (AMD64_RDX_REGNUM, RDX);
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+ netbsd_x86_64_supply_gp (AMD64_RSI_REGNUM, RSI);
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+ netbsd_x86_64_supply_gp (AMD64_RDI_REGNUM, RDI);
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+ netbsd_x86_64_supply_gp (AMD64_RBP_REGNUM, RBP);
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+ netbsd_x86_64_supply_gp (AMD64_RSP_REGNUM, RSP);
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+ netbsd_x86_64_supply_gp (AMD64_R8_REGNUM, R8);
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+ netbsd_x86_64_supply_gp (AMD64_R9_REGNUM, R9);
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+ netbsd_x86_64_supply_gp (AMD64_R10_REGNUM, R10);
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+ netbsd_x86_64_supply_gp (AMD64_R11_REGNUM, R11);
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+ netbsd_x86_64_supply_gp (AMD64_R12_REGNUM, R12);
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+ netbsd_x86_64_supply_gp (AMD64_R13_REGNUM, R13);
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+ netbsd_x86_64_supply_gp (AMD64_R14_REGNUM, R14);
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+ netbsd_x86_64_supply_gp (AMD64_R15_REGNUM, R15);
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+ netbsd_x86_64_supply_gp (AMD64_RIP_REGNUM, RIP);
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+ netbsd_x86_64_supply_gp (AMD64_EFLAGS_REGNUM, RFLAGS);
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+ netbsd_x86_64_supply_gp (AMD64_CS_REGNUM, CS);
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+ netbsd_x86_64_supply_gp (AMD64_SS_REGNUM, SS);
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+ netbsd_x86_64_supply_gp (AMD64_DS_REGNUM, DS);
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+ netbsd_x86_64_supply_gp (AMD64_ES_REGNUM, ES);
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+ netbsd_x86_64_supply_gp (AMD64_FS_REGNUM, FS);
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+ netbsd_x86_64_supply_gp (AMD64_GS_REGNUM, GS);
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+}
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+
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+/* Implements the netbsd_target_ops.arch_setup routine. */
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+
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+static void
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+netbsd_x86_64_arch_setup (void)
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+{
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+ struct target_desc *tdesc
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+ = amd64_create_target_description (X86_XSTATE_SSE_MASK, false, false, false);
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+
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+ init_target_desc (tdesc, amd64_expedite_regs);
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+
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+ netbsd_tdesc = tdesc;
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+}
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+
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+/* Update all the target description of all processes; a new GDB
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+ connected, and it may or not support xml target descriptions. */
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+
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+static void
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+x86_64_netbsd_update_xmltarget (void)
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+{
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+ struct thread_info *saved_thread = current_thread;
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+
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+ /* Before changing the register cache's internal layout, flush the
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+ contents of the current valid caches back to the threads, and
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+ release the current regcache objects. */
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+ regcache_release ();
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+
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+ for_each_process ([] (process_info *proc) {
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+ int pid = proc->pid;
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+
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+ /* Look up any thread of this process. */
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+ current_thread = find_any_thread_of_pid (pid);
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+
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+ the_low_target.arch_setup ();
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+ });
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+
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+ current_thread = saved_thread;
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+}
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+
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+/* Process qSupported query, "xmlRegisters=". */
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+
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+static void
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+netbsd_x86_64_process_qsupported (char **features, int count)
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+{
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+ /* Return if gdb doesn't support XML. If gdb sends "xmlRegisters="
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+ with "i386" in qSupported query, it supports x86 XML target
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+ descriptions. */
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+ use_xml = 0;
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+ for (int i = 0; i < count; i++)
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+ {
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+ const char *feature = features[i];
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+
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+ if (startswith (feature, "xmlRegisters="))
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+ {
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+ char *copy = xstrdup (feature + 13);
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+ char *last;
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+ char *p;
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+
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+ for (p = strtok_r (copy, ",", &last); p != NULL;
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+ p = strtok_r (NULL, ",", &last))
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+ {
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+ if (strcmp (p, "i386") == 0)
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+ {
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+ use_xml = 1;
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+ break;
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+ }
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+ }
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+
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+ free (copy);
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+ }
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+ }
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+ x86_64_netbsd_update_xmltarget ();
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+}
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+
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+/* Description of all the x86-netbsd register sets. */
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+
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+struct netbsd_regset_info netbsd_target_regsets[] =
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+{
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+ /* General Purpose Registers. */
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+ {PT_GETREGS, PT_SETREGS, sizeof (struct reg),
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+ netbsd_x86_64_fill_gregset, netbsd_x86_64_store_gregset},
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+ /* End of list marker. */
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+ {0, 0, -1, NULL, NULL }
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+};
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+
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+/* The netbsd_target_ops vector for x86-netbsd. */
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+
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+struct netbsd_target_ops the_low_target =
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+{
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+ netbsd_x86_64_arch_setup,
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+ netbsd_x86_64_process_qsupported,
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+};
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