[PATCH 00/13] tools/nolibc: riscv: Add full rv32 support

Zhangjin Wu
2023-05-24T17:33:48Z

Hi, Willy

Thanks very mush for your kindly review, discuss and suggestion, now we
get full rv32 support ;-)

In the first series [1], we have fixed up the compile errors about
_start and __NR_llseek for rv32, but left compile errors about tons of
time32 syscalls (removed after kernel commit d4c08b9776b3 ("riscv: Use
latest system call ABI")) and the missing fstat in nolibc-test.c [2],
now we have fixed up all of them.

Introduction
============

This series is based on the 20230524-nolibc-rv32+stkp4 branch of [3], it
includes 3 parts, they work together to add full rv32 support:

* Reverts two old out-of-day patches
* Revert "tools/nolibc: riscv: Support __NR_llseek for rv32"
* Revert "selftests/nolibc: Fix up compile error for rv32"

(these two and the reverted ones:

* commit 606343b7478c ("selftests/nolibc: Fix up compile error for rv32")
* commit d2c3acba6d66 ("tools/nolibc: riscv: Support __NR_llseek for rv32")

can be removed from the git repo completely, there are two new ones to replace
them)

* Compile and test support patches
* selftests/nolibc: print name instead of number for EOVERFLOW
* selftests/nolibc: syscall_args: use __NR_statx for rv32
* --> replace the old one 606343b7478, use statx instead of read
* selftests/nolibc: riscv: customize makefile for rv32
* selftests/nolibc: allow specify a bios for qemu
* selftests/nolibc: remove the duplicated gettimeofday_bad2

* Fix up some missing syscalls, mainly time32 syscalls
* tools/nolibc: sys_lseek: riscv: use __NR_llseek for rv32
* --> replace the old one d2c3acba6d66, cleaned up
* tools/nolibc: sys_poll: riscv: use __NR_ppoll_time64 for rv32
* tools/nolibc: ppoll/ppoll_time64: Add a missing argument
* tools/nolibc: sys_select: riscv: use __NR_pselect6_time64 for rv32
* tools/nolibc: sys_wait4: riscv: use __NR_waitid for rv32
* tools/nolibc: sys_gettimeofday: riscv: use __NR_clock_gettime64 for rv32

Compile
=======

For rv64:

$ make ARCH=riscv CROSS_COMPILE=riscv64-linux-gnu- nolibc-test
$ file nolibc-test
nolibc-test: ELF 64-bit LSB executable, UCB RISC-V ...

$ make ARCH=riscv64 CROSS_COMPILE=riscv64-linux-gnu- nolibc-test
$ file nolibc-test
nolibc-test: ELF 64-bit LSB executable, UCB RISC-V ...

For rv32:

$ make ARCH=riscv CONFIG_32BIT=1 CROSS_COMPILE=riscv64-linux-gnu- nolibc-test
$ file nolibc-test
nolibc-test: ELF 32-bit LSB executable, UCB RISC-V ...

$ make ARCH=riscv32 CROSS_COMPILE=riscv64-linux-gnu- nolibc-test
$ file nolibc-test
nolibc-test: ELF 32-bit LSB executable, UCB RISC-V ...

Testing
=======

Environment:

// gcc toolchain
$ riscv64-linux-gnu-gcc --version
riscv64-linux-gnu-gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

// glibc >= 2.33 required, for older glibc, must upgrade include/bits/wordsize.h
$ dpkg -l | grep libc6-dev | grep riscv
ii libc6-dev-riscv64-cross 2.31-0ubuntu7cross1

// glibc include/bits/wordsize.h: manually upgraded to >= 2.33
// without this, can not build tools/testing/selftests/nolibc/nolibc-test.c
$ cat /usr/riscv64-linux-gnu/include/bits/wordsize.h
#if __riscv_xlen == (__SIZEOF_POINTER__ * 8)
# define __WORDSIZE __riscv_xlen
#else
# error unsupported ABI
#endif

# define __WORDSIZE_TIME64_COMPAT32 1

#if __WORDSIZE == 32
# define __WORDSIZE32_SIZE_ULONG 0
# define __WORDSIZE32_PTRDIFF_LONG 0
#endif

// higher qemu version is better, latest version is v8.0.0+
$ qemu-system-riscv64 --version
QEMU emulator version 4.2.1 (Debian 1:4.2-3ubuntu6.18)
Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers

// opensbi version, higher is better, must match kernel version and qemu version
// rv64: used version is 1.2, latest is 1.2
$ head -2 /labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc/run.out | tail -1
OpenSBI v1.2-116-g7919530
// rv32: used version is v0.9, latest is 1.2
$ head -2 /labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc/run.out | tail -1
OpenSBI v0.9-152-g754d511

For rv64:

$ pwd
/labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc
$ make ARCH=riscv64 CROSS_COMPILE=riscv64-linux-gnu- defconfig
$ make ARCH=riscv64 CROSS_COMPILE=riscv64-linux-gnu- BIOS=/labs/linux-lab/boards/riscv64/virt/bsp/bios/opensbi/generic/fw_jump.elf run
MKDIR sysroot/riscv/include
make[1]: Entering directory '/labs/linux-lab/src/linux-stable/tools/include/nolibc'
make[2]: Entering directory '/labs/linux-lab/src/linux-stable'
make[2]: Leaving directory '/labs/linux-lab/src/linux-stable'
make[2]: Entering directory '/labs/linux-lab/src/linux-stable'
INSTALL /labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc/sysroot/sysroot/include
make[2]: Leaving directory '/labs/linux-lab/src/linux-stable'
make[1]: Leaving directory '/labs/linux-lab/src/linux-stable/tools/include/nolibc'
CC nolibc-test
MKDIR initramfs
INSTALL initramfs/init
make[1]: Entering directory '/labs/linux-lab/src/linux-stable'
...
LD vmlinux
NM System.map
SORTTAB vmlinux
OBJCOPY arch/riscv/boot/Image
Kernel: arch/riscv/boot/Image is ready
make[1]: Leaving directory '/labs/linux-lab/src/linux-stable'
135 test(s) passed.
$ file ../../../../vmlinux
../../../../vmlinux: ELF 64-bit LSB executable, UCB RISC-V, version 1 (SYSV), statically linked, BuildID[sha1]=b8e1cea5122b04bce540b4022f0d6f171ffe615a, not stripped

For rv32:

$ pwd
/labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc
$ make ARCH=riscv32 CROSS_COMPILE=riscv64-linux-gnu- defconfig
$ make ARCH=riscv32 CROSS_COMPILE=riscv64-linux-gnu- BIOS=/labs/linux-lab/boards/riscv32/virt/bsp/bios/opensbi/generic/fw_jump.elf run
MKDIR sysroot/riscv/include
make[1]: Entering directory '/labs/linux-lab/src/linux-stable/tools/include/nolibc'
make[2]: Entering directory '/labs/linux-lab/src/linux-stable'
make[2]: Leaving directory '/labs/linux-lab/src/linux-stable'
make[2]: Entering directory '/labs/linux-lab/src/linux-stable'
INSTALL /labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc/sysroot/sysroot/include
make[2]: Leaving directory '/labs/linux-lab/src/linux-stable'
make[1]: Leaving directory '/labs/linux-lab/src/linux-stable/tools/include/nolibc'
CC nolibc-test
MKDIR initramfs
INSTALL initramfs/init
make[1]: Entering directory '/labs/linux-lab/src/linux-stable'
CALL scripts/checksyscalls.sh
GEN usr/initramfs_data.cpio
COPY usr/initramfs_inc_data
AS usr/initramfs_data.o
AR usr/built-in.a
GEN security/selinux/flask.h security/selinux/av_permissions.h
CC security/selinux/avc.o
CC security/selinux/hooks.o
CC security/selinux/selinuxfs.o
CC security/selinux/nlmsgtab.o
CC security/selinux/netif.o
CC security/selinux/netnode.o
CC security/selinux/netport.o
CC security/selinux/status.o
CC security/selinux/ss/services.o
AR security/selinux/built-in.a
AR security/built-in.a
AR built-in.a
AR vmlinux.a
LD vmlinux.o
OBJCOPY modules.builtin.modinfo
GEN modules.builtin
MODPOST vmlinux.symvers
UPD include/generated/utsversion.h
CC init/version-timestamp.o
LD .tmp_vmlinux.kallsyms1
NM .tmp_vmlinux.kallsyms1.syms
KSYMS .tmp_vmlinux.kallsyms1.S
AS .tmp_vmlinux.kallsyms1.S
LD .tmp_vmlinux.kallsyms2
NM .tmp_vmlinux.kallsyms2.syms
KSYMS .tmp_vmlinux.kallsyms2.S
AS .tmp_vmlinux.kallsyms2.S
LD vmlinux
NM System.map
SORTTAB vmlinux
OBJCOPY arch/riscv/boot/Image
Kernel: arch/riscv/boot/Image is ready
make[1]: Leaving directory '/labs/linux-lab/src/linux-stable'
135 test(s) passed.
$ file ../../../../vmlinux
../../../../vmlinux: ELF 32-bit LSB executable, UCB RISC-V, version 1 (SYSV), statically linked, BuildID[sha1]=bad4c1f3899f47355d2a2010bade56972fd94b9d, not stripped

The full rv64 testing result (run.out) is uploaded at [4].
The full rv32 testing result (run.out) is uploaded at [5].

That's all, thanks!

Best regards,
Zhangjin Wu
---

[1]: https://lore.kernel.org/linux-riscv/20230520143154.68663-1-falcon@tinylab.org/T/#mf0e54ee19bd3f94dadbb4420ed9dffa316d1719d
[2]: https://lore.kernel.org/linux-riscv/20230520135235.68155-1-falcon@tinylab.org/T/#u
[3]: https://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git
[4]: https://pastebin.com/3L0nV78u
[5]: https://pastebin.com/RadrXdta

Zhangjin Wu (13):
Revert "tools/nolibc: riscv: Support __NR_llseek for rv32"
Revert "selftests/nolibc: Fix up compile error for rv32"
selftests/nolibc: print name instead of number for EOVERFLOW
selftests/nolibc: syscall_args: use __NR_statx for rv32
selftests/nolibc: riscv: customize makefile for rv32
selftests/nolibc: allow specify a bios for qemu
selftests/nolibc: remove the duplicated gettimeofday_bad2
tools/nolibc: sys_lseek: riscv: use __NR_llseek for rv32
tools/nolibc: sys_poll: riscv: use __NR_ppoll_time64 for rv32
tools/nolibc: ppoll/ppoll_time64: Add a missing argument
tools/nolibc: sys_select: riscv: use __NR_pselect6_time64 for rv32
tools/nolibc: sys_wait4: riscv: use __NR_waitid for rv32
tools/nolibc: sys_gettimeofday: riscv: use __NR_clock_gettime64 for
rv32

tools/include/nolibc/std.h | 1 +
tools/include/nolibc/sys.h | 135 +++++++++++++++++--
tools/include/nolibc/types.h | 21 ++-
tools/testing/selftests/nolibc/Makefile | 14 +-
tools/testing/selftests/nolibc/nolibc-test.c | 15 ++-
5 files changed, 167 insertions(+), 19 deletions(-)

--
2.25.1