riscv64 syscall stub and seccomp filter generation.
These are sufficiently intertwined that they need to be done together.
riscv64 is our first primary-only architecture, so that required some
changes. The .bp changes are to support this --- we need to only show
the python scripts the architectures they'll actually be using, rather
than showing them everything and ignoring some of the results.
riscv64 is also the first architecture that post-dates the kernel's
64-bit time work, so there's a bit of extra fiddling needed to handle
the __NR3264_ indirection in the uapi headers.
Signed-off-by: Mao Han <han_mao@linux.alibaba.com>
Signed-off-by: Xia Lifang <lifang_xia@linux.alibaba.com>
Signed-off-by: Chen Guoyin <chenguoyin.cgy@linux.alibaba.com>
Signed-off-by: Wang Chen <wangchen20@iscas.ac.cn>
Signed-off-by: Lu Xufan <luxufan@iscas.ac.cn>
Test: local builds for x86-64 and riscv64
Change-Id: I74044744e80b312088f805c44fbd667c9bfcdc69
diff --git a/libc/tools/gensyscalls.py b/libc/tools/gensyscalls.py
index baaa52d..d3e6ef4 100755
--- a/libc/tools/gensyscalls.py
+++ b/libc/tools/gensyscalls.py
@@ -15,7 +15,7 @@
import tempfile
-SupportedArchitectures = [ "arm", "arm64", "x86", "x86_64" ]
+SupportedArchitectures = [ "arm", "arm64", "riscv64", "x86", "x86_64" ]
syscall_stub_header = \
"""
@@ -80,6 +80,24 @@
#
+# RISC-V64 assembler templates for each syscall stub
+#
+
+riscv64_call = syscall_stub_header + """\
+ li a7, %(__NR_name)s
+ ecall
+
+ li a7, -MAX_ERRNO
+ bgtu a0, a7, 1f
+
+ ret
+1:
+ neg a0, a0
+ j __set_errno_internal
+END(%(func)s)
+"""
+
+#
# x86 assembler templates for each syscall stub
#
@@ -228,6 +246,10 @@
return arm64_call % syscall
+def riscv64_genstub(syscall):
+ return riscv64_call % syscall
+
+
def x86_genstub(syscall):
result = syscall_stub_header % syscall
@@ -440,6 +462,9 @@
if "arm64" in syscall:
syscall["asm-arm64"] = add_footer(64, arm64_genstub(syscall), syscall)
+ if "riscv64" in syscall:
+ syscall["asm-riscv64"] = add_footer(64, riscv64_genstub(syscall), syscall)
+
if "x86" in syscall:
if syscall["socketcall_id"] >= 0:
syscall["asm-x86"] = add_footer(32, x86_genstub_socketcall(syscall), syscall)