diff options
| author | Benjamin Berg <benjamin.berg@intel.com> | 2025-09-24 16:20:58 +0200 |
|---|---|---|
| committer | Thomas Weißschuh <linux@weissschuh.net> | 2026-01-04 10:28:44 +0100 |
| commit | ec4bb8e8dfa060c699b548f62e4d56133aafbbec (patch) | |
| tree | ecfe6b0f86696972718ced89f65fdff5dea48c73 | |
| parent | 8f0b4cce4481fb22653697cced8d0d04027cb1e8 (diff) | |
tools/nolibc: add ptrace support
Add ptrace support, as it will be useful in UML.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
[Thomas: drop va_args usage and linux/uio.h inclusion]
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
| -rw-r--r-- | tools/include/nolibc/Makefile | 1 | ||||
| -rw-r--r-- | tools/include/nolibc/nolibc.h | 1 | ||||
| -rw-r--r-- | tools/include/nolibc/sys/ptrace.h | 33 | ||||
| -rw-r--r-- | tools/testing/selftests/nolibc/nolibc-test.c | 2 |
4 files changed, 37 insertions, 0 deletions
diff --git a/tools/include/nolibc/Makefile b/tools/include/nolibc/Makefile index 8118e22844f1..8b883a6fe580 100644 --- a/tools/include/nolibc/Makefile +++ b/tools/include/nolibc/Makefile @@ -54,6 +54,7 @@ all_files := \ sys/mman.h \ sys/mount.h \ sys/prctl.h \ + sys/ptrace.h \ sys/random.h \ sys/reboot.h \ sys/resource.h \ diff --git a/tools/include/nolibc/nolibc.h b/tools/include/nolibc/nolibc.h index 272dfc961158..9c7f43b9218b 100644 --- a/tools/include/nolibc/nolibc.h +++ b/tools/include/nolibc/nolibc.h @@ -101,6 +101,7 @@ #include "sys/mman.h" #include "sys/mount.h" #include "sys/prctl.h" +#include "sys/ptrace.h" #include "sys/random.h" #include "sys/reboot.h" #include "sys/resource.h" diff --git a/tools/include/nolibc/sys/ptrace.h b/tools/include/nolibc/sys/ptrace.h new file mode 100644 index 000000000000..72ca28541633 --- /dev/null +++ b/tools/include/nolibc/sys/ptrace.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: LGPL-2.1 OR MIT */ +/* + * ptrace for NOLIBC + * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu> + * Copyright (C) 2025 Intel Corporation + */ + +/* make sure to include all global symbols */ +#include "../nolibc.h" + +#ifndef _NOLIBC_SYS_PTRACE_H +#define _NOLIBC_SYS_PTRACE_H + +#include "../sys.h" + +#include <linux/ptrace.h> + +/* + * long ptrace(int op, pid_t pid, void *addr, void *data); + */ +static __attribute__((unused)) +long sys_ptrace(int op, pid_t pid, void *addr, void *data) +{ + return my_syscall4(__NR_ptrace, op, pid, addr, data); +} + +static __attribute__((unused)) +ssize_t ptrace(int op, pid_t pid, void *addr, void *data) +{ + return __sysret(sys_ptrace(op, pid, addr, data)); +} + +#endif /* _NOLIBC_SYS_PTRACE_H */ diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index 3c5a226dad3a..6888b20af259 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -17,6 +17,7 @@ #include <sys/mman.h> #include <sys/mount.h> #include <sys/prctl.h> +#include <sys/ptrace.h> #include <sys/random.h> #include <sys/reboot.h> #include <sys/resource.h> @@ -1406,6 +1407,7 @@ int run_syscall(int min, int max) CASE_TEST(readv_zero); EXPECT_SYSZR(1, readv(1, NULL, 0)); break; CASE_TEST(writev_badf); EXPECT_SYSER(1, writev(-1, &iov_one, 1), -1, EBADF); break; CASE_TEST(writev_zero); EXPECT_SYSZR(1, writev(1, NULL, 0)); break; + CASE_TEST(ptrace); EXPECT_SYSER(1, ptrace(PTRACE_CONT, getpid(), NULL, NULL), -1, ESRCH); break; CASE_TEST(syscall_noargs); EXPECT_SYSEQ(1, syscall(__NR_getpid), getpid()); break; CASE_TEST(syscall_args); EXPECT_SYSER(1, syscall(__NR_statx, 0, NULL, 0, 0, NULL), -1, EFAULT); break; CASE_TEST(namespace); EXPECT_SYSZR(euid0 && proc, test_namespace()); break; |