On 8/2/24 18:34, Ajeet Singh wrote:
From: Mark Corbin <mark.cor...@embecsom.com>
Introduced RISC-V specific ELF definitions and hardware capability
detection.
Additionally, a function to retrieve hardware capabilities
('get_elf_hwcap') is implemented, which returns the common bits set in
each CPU's ISA strings.
Signed-off-by: Mark Corbin <mark.cor...@embecsom.com>
Signed-off-by: Ajeet Singh <itac...@freebsd.org>
Co-authored-by: Kyle Evans <kev...@freebsd.org>
---
bsd-user/riscv/target_arch_elf.h | 48 ++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
create mode 100644 bsd-user/riscv/target_arch_elf.h
diff --git a/bsd-user/riscv/target_arch_elf.h b/bsd-user/riscv/target_arch_elf.h
new file mode 100644
index 0000000000..dfb2a3e32e
--- /dev/null
+++ b/bsd-user/riscv/target_arch_elf.h
@@ -0,0 +1,48 @@
+/*
+ * RISC-V ELF definitions
+ *
+ * Copyright (c) 2019 Mark Corbin
+ *
+ * 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 2 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/>.
+ */
+
+#ifndef TARGET_ARCH_ELF_H
+#define TARGET_ARCH_ELF_H
+
+#define elf_check_arch(x) ((x) == EM_RISCV)
+#define ELF_START_MMAP 0x80000000
+#define ELF_ET_DYN_LOAD_ADDR 0x100000
+#define ELF_CLASS ELFCLASS64
+
+#define ELF_DATA ELFDATA2LSB
+#define ELF_ARCH EM_RISCV
+
+/*
+ * Note: FreeBSD returns things a litle differently than this, but this is as
+ * close we have in the emulator. The FreeBSD/riscv64 kernel (in identcpu.c)
+ * returns the common bits set in each of the CPUs' ISA strings. Also, unlike
+ * linux, we don't mask out specific bits.
Given that all user-only cpus are identical, all bits are common.
So this really is identical to the freebsd kernel.
I think that this comment is more confusing than illuminating.
Otherwise,
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
r~