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* [PATCH v4 0/3] nolibc: add part2 of support for rv32
@ 2023-06-07  9:23 Zhangjin Wu
  2023-06-07  9:24 ` [PATCH v4 1/3] tools/nolibc: fix up #error compile failures with -ENOSYS Zhangjin Wu
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Zhangjin Wu @ 2023-06-07  9:23 UTC (permalink / raw)
  To: thomas, w; +Cc: falcon, arnd, linux-kernel, linux-kselftest, linux-riscv

Hi, Willy

This is the v4 part2 of support for rv32 (v3 [1]), it applied the
suggestions from Thomas, Arnd [2] and you [3]. now, the rv32 compile
support almost aligned with x86 except the extra KARCH to make kernel
happy, thanks very much for your nice review!

Since the 'override' method mentioned in [4] split the whole Makefile
context to two parts, it may make the code not that easy to maintain,
so, this patchset goes back to the KARCH (suggested from Willy, before,
I used something like _ARCH) passing method, as suggested by Willy, we
also aligned the KARCH assignment with the other variables.

Changes from v3 -> v4:

* No new changes in the first two except a new Reviewed-by line from Arnd

* selftests/nolibc: riscv: customize makefile for rv32

  Do it like the other architectures, especially like x86.

  The difference from x86 is, the top-level kernel Makefile doesn't
  accept riscv32 and riscv64, it only accept riscv, to make kernel happy,
  a KARCH variable is added for riscv32 and riscv64, and then passed to
  kernel with ARCH=$(KARCH).

  Since tools/include/nolibc/Makefile shares arch-riscv.h between riscv32
  and riscv64 and there is a headers_standalone target who called kernel
  headers and headers_install, so, pass ARCH=$(KARCH) to it too.

Did compile test for aarch64, rv32 and rv64, include run-user and run.

Note, this is required with the default config from the
20230606-nolibc-rv32+stkp7a branch of [5]:

    diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
    index ce02bb09651b..72bd8fe0cad6 100644
    --- a/kernel/rcu/tasks.h
    +++ b/kernel/rcu/tasks.h
    @@ -1934,11 +1934,13 @@ void show_rcu_tasks_gp_kthreads(void)
     }
     #endif /* #ifndef CONFIG_TINY_RCU */
     
    +#ifdef CONFIG_TASKS_RCU
     struct task_struct *get_rcu_tasks_gp_kthread(void)
     {
            return rcu_tasks.kthread_ptr;
     }
     EXPORT_SYMBOL_GPL(get_rcu_tasks_gp_kthread);
    +#endif
     
     #ifdef CONFIG_PROVE_RCU
     struct rcu_tasks_test_desc {


Best regards,
Zhangjin

---

[1]: https://lore.kernel.org/linux-riscv/cover.1685780412.git.falcon@tinylab.org/
[2]: https://lore.kernel.org/linux-riscv/d1c83340-af4c-4780-a101-b9d22b47379c@app.fastmail.com/
[3]: https://lore.kernel.org/lkml/ZIAywHvr6UB1J4of@1wt.eu/
[4]: https://lore.kernel.org/lkml/20230607063314.671429-1-falcon@tinylab.org/
[5]: https://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git



Zhangjin Wu (3):
  tools/nolibc: fix up #error compile failures with -ENOSYS
  tools/nolibc: fix up undeclared syscall macros with #ifdef and -ENOSYS
  selftests/nolibc: riscv: customize makefile for rv32

 tools/include/nolibc/sys.h              | 38 ++++++++++++++++---------
 tools/testing/selftests/nolibc/Makefile | 20 +++++++++++--
 2 files changed, 42 insertions(+), 16 deletions(-)

-- 
2.25.1


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^ permalink raw reply	[flat|nested] 4+ messages in thread
* [PATCH v4 1/3] tools/nolibc: fix up #error compile failures with -ENOSYS
  2023-06-07  9:23 [PATCH v4 0/3] nolibc: add part2 of support for rv32 Zhangjin Wu
@ 2023-06-07  9:24 ` Zhangjin Wu
  2023-06-07  9:27 ` [PATCH v4 2/3] tools/nolibc: fix up undeclared syscall macros with #ifdef and -ENOSYS Zhangjin Wu
  2023-06-07  9:37 ` [PATCH v4 3/3] selftests/nolibc: riscv: customize makefile for rv32 Zhangjin Wu
  2 siblings, 0 replies; 4+ messages in thread
From: Zhangjin Wu @ 2023-06-07  9:24 UTC (permalink / raw)
  To: thomas, w; +Cc: falcon, arnd, linux-kernel, linux-kselftest, linux-riscv

Compiling nolibc for rv32 got such errors:

    In file included from nolibc/sysroot/riscv/include/nolibc.h:99,
                     from nolibc/sysroot/riscv/include/errno.h:26,
                     from nolibc/sysroot/riscv/include/stdio.h:14,
                     from tools/testing/selftests/nolibc/nolibc-test.c:12:
    nolibc/sysroot/riscv/include/sys.h:946:2: error: #error Neither __NR_ppoll nor __NR_poll defined, cannot implement sys_poll()
      946 | #error Neither __NR_ppoll nor __NR_poll defined, cannot implement sys_poll()
          |  ^~~~~
    nolibc/sysroot/riscv/include/sys.h:1062:2: error: #error None of __NR_select, __NR_pselect6, nor __NR__newselect defined, cannot implement sys_select()
     1062 | #error None of __NR_select, __NR_pselect6, nor __NR__newselect defined, cannot implement sys_select()

If a syscall is not supported by a target platform, 'return -ENOSYS' is
better than '#error', which lets the other syscalls work as-is and
allows developers to fix up the test failures reported by nolibc-test
one by one later.

This converts all of the '#error' to 'return -ENOSYS', so, all of the
'#error' failures are fixed.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/linux-riscv/5e7d2adf-e96f-41ca-a4c6-5c87a25d4c9c@app.fastmail.com/
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
---
 tools/include/nolibc/sys.h | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
index 856249a11890..78c86f124335 100644
--- a/tools/include/nolibc/sys.h
+++ b/tools/include/nolibc/sys.h
@@ -124,7 +124,7 @@ int sys_chmod(const char *path, mode_t mode)
 #elif defined(__NR_chmod)
 	return my_syscall2(__NR_chmod, path, mode);
 #else
-#error Neither __NR_fchmodat nor __NR_chmod defined, cannot implement sys_chmod()
+	return -ENOSYS;
 #endif
 }
 
@@ -153,7 +153,7 @@ int sys_chown(const char *path, uid_t owner, gid_t group)
 #elif defined(__NR_chown)
 	return my_syscall3(__NR_chown, path, owner, group);
 #else
-#error Neither __NR_fchownat nor __NR_chown defined, cannot implement sys_chown()
+	return -ENOSYS;
 #endif
 }
 
@@ -251,7 +251,7 @@ int sys_dup2(int old, int new)
 #elif defined(__NR_dup2)
 	return my_syscall2(__NR_dup2, old, new);
 #else
-#error Neither __NR_dup3 nor __NR_dup2 defined, cannot implement sys_dup2()
+	return -ENOSYS;
 #endif
 }
 
@@ -351,7 +351,7 @@ pid_t sys_fork(void)
 #elif defined(__NR_fork)
 	return my_syscall0(__NR_fork);
 #else
-#error Neither __NR_clone nor __NR_fork defined, cannot implement sys_fork()
+	return -ENOSYS;
 #endif
 }
 #endif
@@ -648,7 +648,7 @@ int sys_link(const char *old, const char *new)
 #elif defined(__NR_link)
 	return my_syscall2(__NR_link, old, new);
 #else
-#error Neither __NR_linkat nor __NR_link defined, cannot implement sys_link()
+	return -ENOSYS;
 #endif
 }
 
@@ -700,7 +700,7 @@ int sys_mkdir(const char *path, mode_t mode)
 #elif defined(__NR_mkdir)
 	return my_syscall2(__NR_mkdir, path, mode);
 #else
-#error Neither __NR_mkdirat nor __NR_mkdir defined, cannot implement sys_mkdir()
+	return -ENOSYS;
 #endif
 }
 
@@ -729,7 +729,7 @@ long sys_mknod(const char *path, mode_t mode, dev_t dev)
 #elif defined(__NR_mknod)
 	return my_syscall3(__NR_mknod, path, mode, dev);
 #else
-#error Neither __NR_mknodat nor __NR_mknod defined, cannot implement sys_mknod()
+	return -ENOSYS;
 #endif
 }
 
@@ -848,7 +848,7 @@ int sys_open(const char *path, int flags, mode_t mode)
 #elif defined(__NR_open)
 	return my_syscall3(__NR_open, path, flags, mode);
 #else
-#error Neither __NR_openat nor __NR_open defined, cannot implement sys_open()
+	return -ENOSYS;
 #endif
 }
 
@@ -943,7 +943,7 @@ int sys_poll(struct pollfd *fds, int nfds, int timeout)
 #elif defined(__NR_poll)
 	return my_syscall3(__NR_poll, fds, nfds, timeout);
 #else
-#error Neither __NR_ppoll nor __NR_poll defined, cannot implement sys_poll()
+	return -ENOSYS;
 #endif
 }
 
@@ -1059,7 +1059,7 @@ int sys_select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeva
 #endif
 	return my_syscall5(__NR__newselect, nfds, rfds, wfds, efds, timeout);
 #else
-#error None of __NR_select, __NR_pselect6, nor __NR__newselect defined, cannot implement sys_select()
+	return -ENOSYS;
 #endif
 }
 
@@ -1196,7 +1196,7 @@ int sys_stat(const char *path, struct stat *buf)
 #elif defined(__NR_stat)
 	ret = my_syscall2(__NR_stat, path, &stat);
 #else
-#error Neither __NR_newfstatat nor __NR_stat defined, cannot implement sys_stat()
+	return -ENOSYS;
 #endif
 	buf->st_dev          = stat.st_dev;
 	buf->st_ino          = stat.st_ino;
@@ -1243,7 +1243,7 @@ int sys_symlink(const char *old, const char *new)
 #elif defined(__NR_symlink)
 	return my_syscall2(__NR_symlink, old, new);
 #else
-#error Neither __NR_symlinkat nor __NR_symlink defined, cannot implement sys_symlink()
+	return -ENOSYS;
 #endif
 }
 
@@ -1312,7 +1312,7 @@ int sys_unlink(const char *path)
 #elif defined(__NR_unlink)
 	return my_syscall1(__NR_unlink, path);
 #else
-#error Neither __NR_unlinkat nor __NR_unlink defined, cannot implement sys_unlink()
+	return -ENOSYS;
 #endif
 }
 
-- 
2.25.1


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^ permalink raw reply related	[flat|nested] 4+ messages in thread
* [PATCH v4 2/3] tools/nolibc: fix up undeclared syscall macros with #ifdef and -ENOSYS
  2023-06-07  9:23 [PATCH v4 0/3] nolibc: add part2 of support for rv32 Zhangjin Wu
  2023-06-07  9:24 ` [PATCH v4 1/3] tools/nolibc: fix up #error compile failures with -ENOSYS Zhangjin Wu
@ 2023-06-07  9:27 ` Zhangjin Wu
  2023-06-07  9:37 ` [PATCH v4 3/3] selftests/nolibc: riscv: customize makefile for rv32 Zhangjin Wu
  2 siblings, 0 replies; 4+ messages in thread
From: Zhangjin Wu @ 2023-06-07  9:27 UTC (permalink / raw)
  To: thomas, w; +Cc: falcon, arnd, linux-kernel, linux-kselftest, linux-riscv

Compiling nolibc for rv32 got such errors:

    nolibc/sysroot/riscv/include/sys.h: In function ‘sys_gettimeofday’:
    nolibc/sysroot/riscv/include/sys.h:557:21: error: ‘__NR_gettimeofday’ undeclared (first use in this function); did you mean ‘sys_gettimeofday’?
      557 |  return my_syscall2(__NR_gettimeofday, tv, tz);
          |                     ^~~~~~~~~~~~~~~~~
    nolibc/sysroot/riscv/include/sys.h: In function ‘sys_lseek’:
    nolibc/sysroot/riscv/include/sys.h:675:21: error: ‘__NR_lseek’ undeclared (first use in this function)
      675 |  return my_syscall3(__NR_lseek, fd, offset, whence);
          |                     ^~~~~~~~~~
    nolibc/sysroot/riscv/include/sys.h: In function ‘sys_wait4’:
    nolibc/sysroot/riscv/include/sys.h:1341:21: error: ‘__NR_wait4’ undeclared (first use in this function)
     1341 |  return my_syscall4(__NR_wait4, pid, status, options, rusage);

If a syscall macro is not supported by a target platform, wrap it with
'#ifdef' and 'return -ENOSYS' for the '#else' branch, which lets the
other syscalls work as-is and allows developers to fix up the test
failures reported by nolibc-test one by one later.

This wraps all of the failed syscall macros with '#ifdef' and 'return
-ENOSYS' for the '#else' branch, so, all of the undeclared failures are
fixed.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/linux-riscv/5e7d2adf-e96f-41ca-a4c6-5c87a25d4c9c@app.fastmail.com/
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
---
 tools/include/nolibc/sys.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
index 78c86f124335..5464f93e863e 100644
--- a/tools/include/nolibc/sys.h
+++ b/tools/include/nolibc/sys.h
@@ -554,7 +554,11 @@ long getpagesize(void)
 static __attribute__((unused))
 int sys_gettimeofday(struct timeval *tv, struct timezone *tz)
 {
+#ifdef __NR_gettimeofday
 	return my_syscall2(__NR_gettimeofday, tv, tz);
+#else
+	return -ENOSYS;
+#endif
 }
 
 static __attribute__((unused))
@@ -672,7 +676,11 @@ int link(const char *old, const char *new)
 static __attribute__((unused))
 off_t sys_lseek(int fd, off_t offset, int whence)
 {
+#ifdef __NR_lseek
 	return my_syscall3(__NR_lseek, fd, offset, whence);
+#else
+	return -ENOSYS;
+#endif
 }
 
 static __attribute__((unused))
@@ -1338,7 +1346,11 @@ int unlink(const char *path)
 static __attribute__((unused))
 pid_t sys_wait4(pid_t pid, int *status, int options, struct rusage *rusage)
 {
+#ifdef __NR_wait4
 	return my_syscall4(__NR_wait4, pid, status, options, rusage);
+#else
+	return -ENOSYS;
+#endif
 }
 
 static __attribute__((unused))
-- 
2.25.1


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^ permalink raw reply related	[flat|nested] 4+ messages in thread
* [PATCH v4 3/3] selftests/nolibc: riscv: customize makefile for rv32
  2023-06-07  9:23 [PATCH v4 0/3] nolibc: add part2 of support for rv32 Zhangjin Wu
  2023-06-07  9:24 ` [PATCH v4 1/3] tools/nolibc: fix up #error compile failures with -ENOSYS Zhangjin Wu
  2023-06-07  9:27 ` [PATCH v4 2/3] tools/nolibc: fix up undeclared syscall macros with #ifdef and -ENOSYS Zhangjin Wu
@ 2023-06-07  9:37 ` Zhangjin Wu
  2 siblings, 0 replies; 4+ messages in thread
From: Zhangjin Wu @ 2023-06-07  9:37 UTC (permalink / raw)
  To: thomas, w
  Cc: falcon, arnd, linux-kernel, linux-kselftest, linux-riscv,
	Thomas Weißschuh

Both riscv64 and riscv32 have:

* the same arch/riscv source code tree
* the same tools/include/nolibc/arch-riscv.h
* the same ARCH=riscv value passed to top-level kernel Makefile

The only differences are:

* riscv64 uses defconfig, riscv32 uses rv32_defconfig
* riscv64 uses qemu-system-riscv64, riscv32 uses qemu-system-riscv32
* riscv32 has different compiler options (-march= and -mabi=)

So, riscv32 can share most of the settings with riscv64, add riscv32
support like the original ARCH=riscv support.

To align with x86, the default riscv is reserved for riscv64 and a new
riscv64 is also added to allow users pass ARCH=riscv64 directly.

Since top-level kernel Makefile only accept ARCH=riscv, to make it
happy, let's add a KARCH, set it as riscv for riscv32 and riscv64, and
set it as original ARCH for the others, at last pass it to kernel
targets with ARCH=$(KARCH).

The same ARCH=$(KARCH) passed to tools/include/nolibc/Makefile, for both
arch-riscv.h and the headers_standalone target require it too.

Usage:

    $ make defconfig ARCH=riscv32 CROSS_COMPILE=riscv64-linux-gnu- ...
    $ make run ARCH=riscv32 CROSS_COMPILE=riscv64-linux-gnu- ...

Suggested-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/linux-riscv/4a3b1cdf-91d5-4668-925e-21f8f5c64a92@t-8ch.de/
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/linux-riscv/d1c83340-af4c-4780-a101-b9d22b47379c@app.fastmail.com/
Suggested-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/lkml/ZIAywHvr6UB1J4of@1wt.eu/
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
---
 tools/testing/selftests/nolibc/Makefile | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile
index 4a3a105e1fdf..48fa22817d90 100644
--- a/tools/testing/selftests/nolibc/Makefile
+++ b/tools/testing/selftests/nolibc/Makefile
@@ -14,6 +14,11 @@ include $(srctree)/scripts/subarch.include
 ARCH = $(SUBARCH)
 endif
 
+# kernel supported ARCH names by architecture
+KARCH_riscv32    = riscv
+KARCH_riscv64    = riscv
+KARCH            = $(or $(KARCH_$(ARCH)),$(ARCH))
+
 # kernel image names by architecture
 IMAGE_i386       = arch/x86/boot/bzImage
 IMAGE_x86_64     = arch/x86/boot/bzImage
@@ -21,6 +26,8 @@ IMAGE_x86        = arch/x86/boot/bzImage
 IMAGE_arm64      = arch/arm64/boot/Image
 IMAGE_arm        = arch/arm/boot/zImage
 IMAGE_mips       = vmlinuz
+IMAGE_riscv32    = arch/riscv/boot/Image
+IMAGE_riscv64    = arch/riscv/boot/Image
 IMAGE_riscv      = arch/riscv/boot/Image
 IMAGE_s390       = arch/s390/boot/bzImage
 IMAGE_loongarch  = arch/loongarch/boot/vmlinuz.efi
@@ -34,6 +41,8 @@ DEFCONFIG_x86        = defconfig
 DEFCONFIG_arm64      = defconfig
 DEFCONFIG_arm        = multi_v7_defconfig
 DEFCONFIG_mips       = malta_defconfig
+DEFCONFIG_riscv32    = rv32_defconfig
+DEFCONFIG_riscv64    = defconfig
 DEFCONFIG_riscv      = defconfig
 DEFCONFIG_s390       = defconfig
 DEFCONFIG_loongarch  = defconfig
@@ -49,6 +58,8 @@ QEMU_ARCH_x86        = x86_64
 QEMU_ARCH_arm64      = aarch64
 QEMU_ARCH_arm        = arm
 QEMU_ARCH_mips       = mipsel  # works with malta_defconfig
+QEMU_ARCH_riscv32    = riscv32
+QEMU_ARCH_riscv64    = riscv64
 QEMU_ARCH_riscv      = riscv64
 QEMU_ARCH_s390       = s390x
 QEMU_ARCH_loongarch  = loongarch64
@@ -61,6 +72,8 @@ QEMU_ARGS_x86        = -M pc -append "console=ttyS0,9600 i8042.noaux panic=-1 $(
 QEMU_ARGS_arm64      = -M virt -cpu cortex-a53 -append "panic=-1 $(TEST:%=NOLIBC_TEST=%)"
 QEMU_ARGS_arm        = -M virt -append "panic=-1 $(TEST:%=NOLIBC_TEST=%)"
 QEMU_ARGS_mips       = -M malta -append "panic=-1 $(TEST:%=NOLIBC_TEST=%)"
+QEMU_ARGS_riscv32    = -M virt -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
+QEMU_ARGS_riscv64    = -M virt -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
 QEMU_ARGS_riscv      = -M virt -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
 QEMU_ARGS_s390       = -M s390-ccw-virtio -m 1G -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
 QEMU_ARGS_loongarch  = -M virt -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
@@ -76,6 +89,7 @@ else
 Q=@
 endif
 
+CFLAGS_riscv32 = -march=rv32im -mabi=ilp32
 CFLAGS_s390 = -m64
 CFLAGS_STACKPROTECTOR ?= $(call cc-option,-mstack-protector-guard=global $(call cc-option,-fstack-protector-all))
 CFLAGS  ?= -Os -fno-ident -fno-asynchronous-unwind-tables -std=c89 \
@@ -117,7 +131,7 @@ sysroot: sysroot/$(ARCH)/include
 sysroot/$(ARCH)/include:
 	$(Q)rm -rf sysroot/$(ARCH) sysroot/sysroot
 	$(QUIET_MKDIR)mkdir -p sysroot
-	$(Q)$(MAKE) -C ../../../include/nolibc ARCH=$(ARCH) OUTPUT=$(CURDIR)/sysroot/ headers_standalone
+	$(Q)$(MAKE) -C ../../../include/nolibc ARCH=$(KARCH) OUTPUT=$(CURDIR)/sysroot/ headers_standalone
 	$(Q)mv sysroot/sysroot sysroot/$(ARCH)
 
 nolibc-test: nolibc-test.c sysroot/$(ARCH)/include
@@ -141,10 +155,10 @@ initramfs: nolibc-test
 	$(Q)cp nolibc-test initramfs/init
 
 defconfig:
-	$(Q)$(MAKE) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE) mrproper $(DEFCONFIG) prepare
+	$(Q)$(MAKE) -C $(srctree) ARCH=$(KARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE) mrproper $(DEFCONFIG) prepare
 
 kernel: initramfs
-	$(Q)$(MAKE) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE) $(IMAGE_NAME) CONFIG_INITRAMFS_SOURCE=$(CURDIR)/initramfs
+	$(Q)$(MAKE) -C $(srctree) ARCH=$(KARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE) $(IMAGE_NAME) CONFIG_INITRAMFS_SOURCE=$(CURDIR)/initramfs
 
 # run the tests after building the kernel
 run: kernel
-- 
2.25.1


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2023-06-07  9:23 [PATCH v4 0/3] nolibc: add part2 of support for rv32 Zhangjin Wu
2023-06-07  9:24 ` [PATCH v4 1/3] tools/nolibc: fix up #error compile failures with -ENOSYS Zhangjin Wu
2023-06-07  9:27 ` [PATCH v4 2/3] tools/nolibc: fix up undeclared syscall macros with #ifdef and -ENOSYS Zhangjin Wu
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