From: "Paul E. McKenney" <[email protected]>
To: [email protected]
Cc: [email protected], [email protected], [email protected],
"Thomas Weißschuh" <[email protected]>,
"Willy Tarreau" <[email protected]>,
"Paul E . McKenney" <[email protected]>
Subject: [PATCH v2 nolibc 17/53] tools/nolibc/unistd: add syscall()
Date: Mon, 12 Jun 2023 13:44:38 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <8b757cc0-3719-4e63-a755-9710384137bc@paulmck-laptop>
From: Thomas Weißschuh <[email protected]>
syscall() is used by "normal" libcs to allow users to directly call
syscalls.
By having the same syntax inside nolibc users can more easily write code
that works with different libcs.
The macro logic is adapted from systemtaps STAP_PROBEV() macro that is
released in the public domain / CC0.
Signed-off-by: Thomas Weißschuh <[email protected]>
Signed-off-by: Willy Tarreau <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
---
tools/include/nolibc/unistd.h | 15 +++++++++++++++
tools/testing/selftests/nolibc/nolibc-test.c | 2 ++
2 files changed, 17 insertions(+)
diff --git a/tools/include/nolibc/unistd.h b/tools/include/nolibc/unistd.h
index ac7d53d986cd..0e832e10a0b2 100644
--- a/tools/include/nolibc/unistd.h
+++ b/tools/include/nolibc/unistd.h
@@ -56,6 +56,21 @@ int tcsetpgrp(int fd, pid_t pid)
return ioctl(fd, TIOCSPGRP, &pid);
}
+#define _syscall(N, ...) \
+({ \
+ long _ret = my_syscall##N(__VA_ARGS__); \
+ if (_ret < 0) { \
+ SET_ERRNO(-_ret); \
+ _ret = -1; \
+ } \
+ _ret; \
+})
+
+#define _syscall_narg(...) __syscall_narg(__VA_ARGS__, 6, 5, 4, 3, 2, 1, 0)
+#define __syscall_narg(_0, _1, _2, _3, _4, _5, _6, N, ...) N
+#define _syscall_n(N, ...) _syscall(N, __VA_ARGS__)
+#define syscall(...) _syscall_n(_syscall_narg(__VA_ARGS__), ##__VA_ARGS__)
+
/* make sure to include all global symbols */
#include "nolibc.h"
diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
index f042a6436b6b..54bf91847af3 100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -588,6 +588,8 @@ int run_syscall(int min, int max)
CASE_TEST(waitpid_child); EXPECT_SYSER(1, waitpid(getpid(), &tmp, WNOHANG), -1, ECHILD); break;
CASE_TEST(write_badf); EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break;
CASE_TEST(write_zero); EXPECT_SYSZR(1, write(1, &tmp, 0)); break;
+ CASE_TEST(syscall_noargs); EXPECT_SYSEQ(1, syscall(__NR_getpid), getpid()); break;
+ CASE_TEST(syscall_args); EXPECT_SYSER(1, syscall(__NR_fstat, 0, NULL), -1, EFAULT); break;
case __LINE__:
return ret; /* must be last */
/* note: do not set any defaults so as to permit holes above */
--
2.40.1
next prev parent reply other threads:[~2023-06-12 20:45 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-18 14:55 [PATCH nolibc 0/15] nolibc updates for v6.5] Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 01/15] tools/nolibc: tests: use volatile to force stack smashing Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 02/15] tools/nolibc: tests: fix build on non-c99 compliant compilers Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 03/15] tools/nolibc: fix build of the test case using glibc Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 04/15] tools/nolibc: add libc-test binary Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 05/15] tools/nolibc: add wrapper for memfd_create Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 06/15] tools/nolibc: implement fd-based FILE streams Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 07/15] tools/nolibc: add testcases for vfprintf Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 08/15] tools/nolibc: Fix build of stdio.h due to header ordering Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 09/15] tools/nolibc: use standard __asm__ statements Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 10/15] tools/nolibc: use __inline__ syntax Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 11/15] tools/nolibc: use C89 comment syntax Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 12/15] tools/nolibc: validate C89 compatibility Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 13/15] tools/nolibc: s390: provide custom implementation for sys_fork Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 14/15] tools/nolibc: add testcase for fork()/waitpid() Paul E. McKenney
2023-05-18 14:55 ` [PATCH v2 nolibc 15/15] tools/nolibc: remove LINUX_REBOOT_ constants Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 0/15] nolibc updates for v6.5] Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 01/53] tools/nolibc: tests: use volatile to force stack smashing Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 02/53] tools/nolibc: tests: fix build on non-c99 compliant compilers Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 03/53] tools/nolibc: fix build of the test case using glibc Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 04/53] tools/nolibc: add libc-test binary Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 05/53] tools/nolibc: add wrapper for memfd_create Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 06/53] tools/nolibc: implement fd-based FILE streams Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 07/53] tools/nolibc: add testcases for vfprintf Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 08/53] tools/nolibc: Fix build of stdio.h due to header ordering Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 09/53] tools/nolibc: use standard __asm__ statements Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 10/53] tools/nolibc: use __inline__ syntax Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 11/53] tools/nolibc: use C89 comment syntax Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 12/53] tools/nolibc: validate C89 compatibility Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 13/53] tools/nolibc: s390: provide custom implementation for sys_fork Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 14/53] tools/nolibc: add testcase for fork()/waitpid() Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 15/53] tools/nolibc: remove LINUX_REBOOT_ constants Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 16/53] tools/nolibc: riscv: Fix up load/store instructions for rv32 Paul E. McKenney
2023-06-12 20:44 ` Paul E. McKenney [this message]
2023-06-12 20:44 ` [PATCH v2 nolibc 18/53] selftests/nolibc: syscall_args: use generic __NR_statx Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 19/53] selftests/nolibc: reduce syscalls during space padding Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 20/53] tools/nolibc: aarch64: add stackprotector support Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 21/53] tools/nolibc: arm: " Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 22/53] tools/nolibc: loongarch: " Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 23/53] tools/nolibc: mips: " Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 24/53] tools/nolibc: riscv: " Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 25/53] tools/nolibc: fix typo pint -> point Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 26/53] tools/nolibc: x86_64: disable stack protector for _start Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 27/53] tools/nolibc: ensure stack protector guard is never zero Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 28/53] tools/nolibc: add test for __stack_chk_guard initialization Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 29/53] tools/nolibc: reformat list of headers to be installed Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 30/53] tools/nolibc: add autodetection for stackprotector support Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 31/53] tools/nolibc: simplify stackprotector compiler flags Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 32/53] tools/nolibc: fix segfaults on compilers without attribute no_stack_protector Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 33/53] tools/nolibc: s390: disable stackprotector in _start Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 34/53] tools/nolibc: add support for prctl() Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 35/53] selftests/nolibc: prevent coredumps during test execution Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 36/53] tools/nolibc: support nanoseconds in stat() Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 37/53] selftests/nolibc: print name instead of number for EOVERFLOW Paul E. McKenney
2023-06-12 20:44 ` [PATCH v2 nolibc 38/53] selftests/nolibc: remove the duplicated gettimeofday_bad2 Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 39/53] tools/nolibc: ppoll/ppoll_time64: add a missing argument Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 40/53] selftests/nolibc: test_fork: fix up duplicated print Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 41/53] tools/nolibc: ensure fast64 integer types have 64 bits Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 42/53] selftests/nolibc: remove test gettimeofday_null Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 43/53] selftests/nolibc: allow specify extra arguments for qemu Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 44/53] selftests/nolibc: fix up compile warning with glibc on x86_64 Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 45/53] selftests/nolibc: not include limits.h for nolibc Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 46/53] selftests/nolibc: use INT_MAX instead of __INT_MAX__ Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 47/53] tools/nolibc: arm: add missing my_syscall6 Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 48/53] tools/nolibc: open: fix up compile warning for arm Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 49/53] selftests/nolibc: support two errnos with EXPECT_SYSER2() Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 50/53] selftests/nolibc: remove gettimeofday_bad1/2 completely Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 51/53] selftests/nolibc: add new gettimeofday test cases Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 52/53] selftests/nolibc: also count skipped and failed tests in output Paul E. McKenney
2023-06-12 20:45 ` [PATCH v2 nolibc 53/53] selftests/nolibc: make sure gcc always use little endian on MIPS Paul E. McKenney
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