From: Zhangjin Wu <falcon@tinylab.org>
To: w@1wt.eu
Cc: arnd@arndb.de, falcon@tinylab.org, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org, linux-riscv@lists.infradead.org,
thomas@t-8ch.de
Subject: [PATCH v2 12/13] tools/nolibc: sys_wait4: add waitid syscall support
Date: Tue, 30 May 2023 04:01:13 +0800 [thread overview]
Message-ID: <ad9654c0d65a978b5757d8c5697edbc89d4937e3.1685387484.git.falcon@tinylab.org> (raw)
In-Reply-To: <cover.1685387484.git.falcon@tinylab.org>
rv32 uses the generic include/uapi/asm-generic/unistd.h and it has no
__NR_wait4 after kernel commit d4c08b9776b3 ("riscv: Use latest system
call ABI"), use __NR_waitid instead.
This code is based on sysdeps/unix/sysv/linux/wait4.c of glibc.
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
---
tools/include/nolibc/sys.h | 50 ++++++++++++++++++++++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
index 533233094733..a32b90b1fd3b 100644
--- a/tools/include/nolibc/sys.h
+++ b/tools/include/nolibc/sys.h
@@ -12,6 +12,7 @@
/* system includes */
#include <asm/unistd.h>
+#include <asm/siginfo.h> /* for siginfo_t */
#include <asm/signal.h> /* for SIGCHLD */
#include <asm/ioctls.h>
#include <asm/mman.h>
@@ -1373,7 +1374,56 @@ 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);
+#elif defined(__NR_waitid)
+ siginfo_t infop;
+ int idtype = P_PID;
+ int ret;
+
+ if (pid < -1) {
+ idtype = P_PGID;
+ pid *= -1;
+ } else if (pid == -1) {
+ idtype = P_ALL;
+ } else if (pid == 0) {
+ idtype = P_PGID;
+ }
+
+ options |= WEXITED;
+
+ ret = my_syscall5(__NR_waitid, idtype, pid, &infop, options, rusage);
+ if (ret < 0)
+ return ret;
+
+ if (status) {
+ switch (infop.si_code) {
+ case CLD_EXITED:
+ *status = W_EXITCODE(infop.si_status, 0);
+ break;
+ case CLD_DUMPED:
+ *status = WCOREFLAG | infop.si_status;
+ break;
+ case CLD_KILLED:
+ *status = infop.si_status;
+ break;
+ case CLD_TRAPPED:
+ case CLD_STOPPED:
+ *status = W_STOPCODE(infop.si_status);
+ break;
+ case CLD_CONTINUED:
+ *status = W_CONTINUED;
+ break;
+ default:
+ *status = 0;
+ break;
+ }
+ }
+
+ return infop.si_pid;
+#else
+#error Neither __NR_wait4 nor __NR_waitid defined, cannot implement sys_wait4()
+#endif
}
static __attribute__((unused))
--
2.25.1
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2023-05-29 20:02 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-29 19:45 [PATCH v2 00/13] nolibc: add part2 of support for rv32 Zhangjin Wu
2023-05-29 19:46 ` [PATCH v2 01/13] selftests/nolibc: remove gettimeofday_bad1/2 completely Zhangjin Wu
2023-05-29 19:47 ` [PATCH v2 02/13] selftests/nolibc: support two errnos with EXPECT_SYSER2() Zhangjin Wu
2023-05-29 19:49 ` [PATCH v2 03/13] selftests/nolibc: waitpid_min: add waitid syscall support Zhangjin Wu
2023-05-29 19:50 ` [PATCH v2 04/13] tools/nolibc: add missing nanoseconds support for __NR_statx Zhangjin Wu
2023-05-29 21:39 ` Thomas Weißschuh
2023-05-30 5:21 ` Zhangjin Wu
2023-05-29 19:51 ` [PATCH v2 05/13] tools/nolibc: add more wait status related types Zhangjin Wu
2023-05-29 19:53 ` [PATCH v2 06/13] tools/nolibc: add pure 64bit off_t, time_t and blkcnt_t Zhangjin Wu
2023-05-29 19:54 ` [PATCH v2 07/13] tools/nolibc: sys_lseek: add pure 64bit lseek Zhangjin Wu
2023-05-30 8:10 ` Arnd Bergmann
2023-05-30 13:54 ` Zhangjin Wu
2023-07-02 16:28 ` Willy Tarreau
2023-05-29 19:56 ` [PATCH v2 08/13] tools/nolibc: add pure 64bit time structs Zhangjin Wu
2023-05-29 19:57 ` [PATCH v2 09/13] tools/nolibc: sys_select: add pure 64bit select Zhangjin Wu
2023-05-29 19:58 ` [PATCH v2 10/13] tools/nolibc: sys_poll: add pure 64bit poll Zhangjin Wu
2023-05-29 19:59 ` [PATCH v2 11/13] tools/nolibc: sys_gettimeofday: add pure 64bit gettimeofday Zhangjin Wu
2023-05-29 20:01 ` Zhangjin Wu [this message]
2023-05-29 20:03 ` [PATCH v2 13/13] selftests/nolibc: riscv: customize makefile for rv32 Zhangjin Wu
2023-06-02 4:06 ` Zhangjin Wu
2023-06-02 10:33 ` Thomas Weißschuh
2023-06-02 11:56 ` Zhangjin Wu
2023-05-30 6:33 ` [PATCH v2 0/2] nolibc: add part3 of support " Zhangjin Wu
2023-05-30 6:37 ` [PATCH 1/2] selftests/nolibc: add new gettimeofday test cases Zhangjin Wu
2023-05-30 10:59 ` Thomas Weißschuh
2023-05-30 11:28 ` Zhangjin Wu
2023-05-30 11:54 ` Thomas Weißschuh
2023-05-30 12:05 ` Willy Tarreau
2023-05-30 12:31 ` Andreas Schwab
2023-05-30 12:35 ` Thomas Weißschuh
2023-05-30 6:42 ` [PATCH 2/2] selftests/nolibc: add sizeof test for the new 64bit data types Zhangjin Wu
2023-05-30 9:18 ` Thomas Weißschuh
2023-05-30 11:17 ` Zhangjin Wu
2023-06-02 19:44 ` [PATCH v2 00/13] nolibc: add part2 of support for rv32 Willy Tarreau
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ad9654c0d65a978b5757d8c5697edbc89d4937e3.1685387484.git.falcon@tinylab.org \
--to=falcon@tinylab.org \
--cc=arnd@arndb.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-riscv@lists.infradead.org \
--cc=thomas@t-8ch.de \
--cc=w@1wt.eu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).