From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58275) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eiaCX-00054T-LH for qemu-devel@nongnu.org; Mon, 05 Feb 2018 01:24:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eiaCW-0006LI-0r for qemu-devel@nongnu.org; Mon, 05 Feb 2018 01:24:25 -0500 Received: from mail-pl0-x243.google.com ([2607:f8b0:400e:c01::243]:38207) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1eiaCV-0006Kx-QQ for qemu-devel@nongnu.org; Mon, 05 Feb 2018 01:24:23 -0500 Received: by mail-pl0-x243.google.com with SMTP id 13so11148755plb.5 for ; Sun, 04 Feb 2018 22:24:23 -0800 (PST) From: Michael Clark Date: Mon, 5 Feb 2018 19:22:32 +1300 Message-Id: <1517811767-75958-7-git-send-email-mjc@sifive.com> In-Reply-To: <1517811767-75958-1-git-send-email-mjc@sifive.com> References: <1517811767-75958-1-git-send-email-mjc@sifive.com> Subject: [Qemu-devel] [PATCH v4 07/22] RISC-V GDB Stub List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Michael Clark , Palmer Dabbelt , Sagar Karandikar , Bastian Koppelmann , RISC-V Patches GDB Register read and write routines. Reviewed-by: Richard Henderson Signed-off-by: Michael Clark --- target/riscv/gdbstub.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 target/riscv/gdbstub.c diff --git a/target/riscv/gdbstub.c b/target/riscv/gdbstub.c new file mode 100644 index 0000000..500bd5f --- /dev/null +++ b/target/riscv/gdbstub.c @@ -0,0 +1,60 @@ +/* + * RISC-V GDB Server Stub + * + * Author: Sagar Karandikar, sagark@eecs.berkeley.edu + * + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see . + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "exec/gdbstub.h" +#include "cpu.h" + +int riscv_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n) +{ + RISCVCPU *cpu = RISCV_CPU(cs); + CPURISCVState *env = &cpu->env; + + if (n < 32) { + return gdb_get_regl(mem_buf, env->gpr[n]); + } else if (n == 32) { + return gdb_get_regl(mem_buf, env->pc); + } else if (n < 65) { + return gdb_get_reg64(mem_buf, env->fpr[n - 33]); + } + return 0; +} + +int riscv_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) +{ + RISCVCPU *cpu = RISCV_CPU(cs); + CPURISCVState *env = &cpu->env; + + if (n == 0) { + /* discard writes to x0 */ + return sizeof(target_ulong); + } else if (n < 32) { + env->gpr[n] = ldtul_p(mem_buf); + return sizeof(target_ulong); + } else if (n == 32) { + env->pc = ldtul_p(mem_buf); + return sizeof(target_ulong); + } else if (n < 65) { + env->fpr[n - 33] = ldq_p(mem_buf); /* always 64-bit */ + return sizeof(uint64_t); + } + return 0; +} -- 2.7.0