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116 lines
4.0 KiB
116 lines
4.0 KiB
2 years ago
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Taken from https://github.com/nelhage/reptyr/commit/e26724cc1ae5fe7af0c9fb6369f6cf09d1d12900
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From ae0b4ec014c1a01b1c3409e5404cf0fa0102c349 Mon Sep 17 00:00:00 2001
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From: Ast-x64 <Ast-x64@protonmail.com>
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Date: Wed, 10 Nov 2021 09:39:45 +0800
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Subject: [PATCH] Support riscv64 on Linux.
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---
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platform/linux/arch/riscv64.h | 68 +++++++++++++++++++++++++++++++++++
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platform/linux/linux_ptrace.c | 2 ++
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ptrace.h | 3 ++
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3 files changed, 73 insertions(+)
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create mode 100644 platform/linux/arch/riscv64.h
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diff --git a/platform/linux/arch/riscv64.h b/platform/linux/arch/riscv64.h
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new file mode 100644
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index 0000000..96221c3
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--- /dev/null
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+++ b/platform/linux/arch/riscv64.h
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@@ -0,0 +1,68 @@
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+/*
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+ * Copyright (C) 2021 by Ast-x64
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+ *
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+ * Permission is hereby granted, free of charge, to any person obtaining a copy
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+ * of this software and associated documentation files (the "Software"), to deal
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+ * in the Software without restriction, including without limitation the rights
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+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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+ * copies of the Software, and to permit persons to whom the Software is
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+ * furnished to do so, subject to the following conditions:
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+ *
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+ * The above copyright notice and this permission notice shall be included in
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+ * all copies or substantial portions of the Software.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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+ * THE SOFTWARE.
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+ */
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+static struct ptrace_personality arch_personality[1] = {
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+ {
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+ offsetof(struct user_regs_struct, a0),
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+ offsetof(struct user_regs_struct, a0),
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+ offsetof(struct user_regs_struct, a1),
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+ offsetof(struct user_regs_struct, a2),
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+ offsetof(struct user_regs_struct, a3),
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+ offsetof(struct user_regs_struct, a4),
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+ offsetof(struct user_regs_struct, a5),
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+ offsetof(struct user_regs_struct, pc),
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+ }
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+};
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+
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+static inline void arch_fixup_regs(struct ptrace_child *child) {
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+ child->regs.pc -= 4;
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+}
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+
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+static inline int arch_set_syscall(struct ptrace_child *child,
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+ unsigned long sysno) {
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+ unsigned long x_reg[18];
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+ struct iovec reg_iovec = {
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+ .iov_base = x_reg,
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+ .iov_len = sizeof(x_reg)
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+ };
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+ if (ptrace_command(child, PTRACE_GETREGSET, NT_PRSTATUS, ®_iovec) < 0)
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+ return -1;
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+
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+ x_reg[17] = sysno;
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+ return ptrace_command(child, PTRACE_SETREGSET, NT_PRSTATUS, ®_iovec);
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+}
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+
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+static inline int arch_save_syscall(struct ptrace_child *child) {
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+ unsigned long x_reg[18];
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+ struct iovec reg_iovec = {
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+ .iov_base = x_reg,
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+ .iov_len = sizeof(x_reg)
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+ };
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+ if (ptrace_command(child, PTRACE_GETREGSET, NT_PRSTATUS, ®_iovec) < 0)
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+ return -1;
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+
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+ child->saved_syscall = x_reg[17];
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+ return 0;
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+}
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+
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+static inline int arch_restore_syscall(struct ptrace_child *child) {
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+ return arch_set_syscall(child, child->saved_syscall);
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+}
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diff --git a/platform/linux/linux_ptrace.c b/platform/linux/linux_ptrace.c
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index d065199..bcbe600 100644
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--- a/platform/linux/linux_ptrace.c
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+++ b/platform/linux/linux_ptrace.c
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@@ -84,6 +84,8 @@ static struct ptrace_personality *personality(struct ptrace_child *child);
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#include "arch/aarch64.h"
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#elif defined(__powerpc__)
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#include "arch/powerpc.h"
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+#elif defined(__riscv) && __riscv_xlen == 64
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+#include "arch/riscv64.h"
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#else
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#error Unsupported architecture.
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#endif
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diff --git a/ptrace.h b/ptrace.h
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index ee05bd7..8e3a7f4 100644
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--- a/ptrace.h
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+++ b/ptrace.h
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@@ -25,6 +25,9 @@
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#ifdef __powerpc__
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#include <asm/ptrace.h>
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#endif
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+#ifdef __riscv
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+#include <asm/ptrace.h>
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+#endif
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#include <sys/ptrace.h>
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#include <sys/types.h>
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#include <sys/user.h>
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