diff options
Diffstat (limited to 'src/basic/missing_syscall.h')
| -rw-r--r-- | src/basic/missing_syscall.h | 812 |
1 files changed, 812 insertions, 0 deletions
diff --git a/src/basic/missing_syscall.h b/src/basic/missing_syscall.h new file mode 100644 index 0000000..0594a1b --- /dev/null +++ b/src/basic/missing_syscall.h @@ -0,0 +1,812 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +/* Missing glibc definitions to access certain kernel APIs */ + +#include <errno.h> +#include <fcntl.h> +#include <signal.h> +#include <sys/syscall.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <unistd.h> + +#ifdef ARCH_MIPS +#include <asm/sgidefs.h> +#endif + +#if defined(__x86_64__) && defined(__ILP32__) +# define systemd_SC_arch_bias(x) ((x) | /* __X32_SYSCALL_BIT */ 0x40000000) +#elif defined(__ia64__) +# define systemd_SC_arch_bias(x) (1024 + (x)) +#elif defined __alpha__ +# define systemd_SC_arch_bias(x) (110 + (x)) +#elif defined _MIPS_SIM +# if _MIPS_SIM == _MIPS_SIM_ABI32 +# define systemd_SC_arch_bias(x) (4000 + (x)) +# elif _MIPS_SIM == _MIPS_SIM_NABI32 +# define systemd_SC_arch_bias(x) (6000 + (x)) +# elif _MIPS_SIM == _MIPS_SIM_ABI64 +# define systemd_SC_arch_bias(x) (5000 + (x)) +# else +# error "Unknown MIPS ABI" +# endif +#else +# define systemd_SC_arch_bias(x) (x) +#endif + +#include "missing_keyctl.h" +#include "missing_stat.h" + +/* linux/kcmp.h */ +#ifndef KCMP_FILE /* 3f4994cfc15f38a3159c6e3a4b3ab2e1481a6b02 (3.19) */ +#define KCMP_FILE 0 +#endif + +#if !HAVE_PIVOT_ROOT +static inline int missing_pivot_root(const char *new_root, const char *put_old) { + return syscall(__NR_pivot_root, new_root, put_old); +} + +# define pivot_root missing_pivot_root +#endif + +/* ======================================================================= */ + +#if defined __x86_64__ +# define systemd_NR_memfd_create systemd_SC_arch_bias(319) +#elif defined __arm__ +# define systemd_NR_memfd_create 385 +#elif defined __aarch64__ +# define systemd_NR_memfd_create 279 +#elif defined __alpha__ +# define systemd_NR_memfd_create 512 +#elif defined(__powerpc__) +# define systemd_NR_memfd_create 360 +#elif defined __s390__ +# define systemd_NR_memfd_create 350 +#elif defined _MIPS_SIM +# if _MIPS_SIM == _MIPS_SIM_ABI32 +# define systemd_NR_memfd_create systemd_SC_arch_bias(354) +# elif _MIPS_SIM == _MIPS_SIM_NABI32 +# define systemd_NR_memfd_create systemd_SC_arch_bias(318) +# elif _MIPS_SIM == _MIPS_SIM_ABI64 +# define systemd_NR_memfd_create systemd_SC_arch_bias(314) +# endif +#elif defined __i386__ +# define systemd_NR_memfd_create 356 +#elif defined __arc__ +# define systemd_NR_memfd_create 279 +#else +# warning "memfd_create() syscall number unknown for your architecture" +#endif + +/* may be (invalid) negative number due to libseccomp, see PR 13319 */ +#if defined __NR_memfd_create && __NR_memfd_create >= 0 +# if defined systemd_NR_memfd_create +assert_cc(__NR_memfd_create == systemd_NR_memfd_create); +# endif +#else +# if defined __NR_memfd_create +# undef __NR_memfd_create +# endif +# if defined systemd_NR_memfd_create +# define __NR_memfd_create systemd_NR_memfd_create +# endif +#endif + +#if !HAVE_MEMFD_CREATE +static inline int missing_memfd_create(const char *name, unsigned int flags) { +# ifdef __NR_memfd_create + return syscall(__NR_memfd_create, name, flags); +# else + errno = ENOSYS; + return -1; +# endif +} + +# define memfd_create missing_memfd_create +#endif + +/* ======================================================================= */ + +#if defined __x86_64__ +# define systemd_NR_getrandom systemd_SC_arch_bias(318) +#elif defined(__i386__) +# define systemd_NR_getrandom 355 +#elif defined(__arm__) +# define systemd_NR_getrandom 384 +#elif defined(__aarch64__) +# define systemd_NR_getrandom 278 +#elif defined(__alpha__) +# define systemd_NR_getrandom 511 +#elif defined(__ia64__) +# define systemd_NR_getrandom systemd_SC_arch_bias(318) +#elif defined(__m68k__) +# define systemd_NR_getrandom 352 +#elif defined(__s390x__) +# define systemd_NR_getrandom 349 +#elif defined(__powerpc__) +# define systemd_NR_getrandom 359 +#elif defined _MIPS_SIM +# if _MIPS_SIM == _MIPS_SIM_ABI32 +# define systemd_NR_getrandom systemd_SC_arch_bias(353) +# elif _MIPS_SIM == _MIPS_SIM_NABI32 +# define systemd_NR_getrandom systemd_SC_arch_bias(317) +# elif _MIPS_SIM == _MIPS_SIM_ABI64 +# define systemd_NR_getrandom systemd_SC_arch_bias(313) +# endif +#elif defined(__arc__) +# define systemd_NR_getrandom 278 +#else +# warning "getrandom() syscall number unknown for your architecture" +#endif + +/* may be (invalid) negative number due to libseccomp, see PR 13319 */ +#if defined __NR_getrandom && __NR_getrandom >= 0 +# if defined systemd_NR_getrandom +assert_cc(__NR_getrandom == systemd_NR_getrandom); +# endif +#else +# if defined __NR_getrandom +# undef __NR_getrandom +# endif +# if defined systemd_NR_getrandom +# define __NR_getrandom systemd_NR_getrandom +# endif +#endif + +#if !HAVE_GETRANDOM +static inline int missing_getrandom(void *buffer, size_t count, unsigned flags) { +# ifdef __NR_getrandom + return syscall(__NR_getrandom, buffer, count, flags); +# else + errno = ENOSYS; + return -1; +# endif +} + +# define getrandom missing_getrandom +#endif + +/* ======================================================================= */ + +/* The syscall has been defined since forever, but the glibc wrapper was missing. */ +#if !HAVE_GETTID +static inline pid_t missing_gettid(void) { +# if defined __NR_gettid && __NR_gettid >= 0 + return (pid_t) syscall(__NR_gettid); +# else +# error "__NR_gettid not defined" +# endif +} + +# define gettid missing_gettid +#endif + +/* ======================================================================= */ + +#if defined(__x86_64__) +# define systemd_NR_name_to_handle_at systemd_SC_arch_bias(303) +#elif defined(__i386__) +# define systemd_NR_name_to_handle_at 341 +#elif defined(__arm__) +# define systemd_NR_name_to_handle_at 370 +#elif defined __aarch64__ +# define systemd_NR_name_to_handle_at 264 +#elif defined(__alpha__) +# define systemd_NR_name_to_handle_at 497 +#elif defined(__powerpc__) +# define systemd_NR_name_to_handle_at 345 +#elif defined __s390__ || defined __s390x__ +# define systemd_NR_name_to_handle_at 335 +#elif defined(__arc__) +# define systemd_NR_name_to_handle_at 264 +#elif defined _MIPS_SIM +# if _MIPS_SIM == _MIPS_SIM_ABI32 +# define systemd_NR_name_to_handle_at systemd_SC_arch_bias(339) +# elif _MIPS_SIM == _MIPS_SIM_NABI32 +# define systemd_NR_name_to_handle_at systemd_SC_arch_bias(303) +# elif _MIPS_SIM == _MIPS_SIM_ABI64 +# define systemd_NR_name_to_handle_at systemd_SC_arch_bias(298) +# endif +#else +# warning "name_to_handle_at number is not defined" +#endif + +/* may be (invalid) negative number due to libseccomp, see PR 13319 */ +#if defined __NR_name_to_handle_at && __NR_name_to_handle_at >= 0 +# if defined systemd_NR_name_to_handle_at +assert_cc(__NR_name_to_handle_at == systemd_NR_name_to_handle_at); +# endif +#else +# if defined __NR_name_to_handle_at +# undef __NR_name_to_handle_at +# endif +# if defined systemd_NR_name_to_handle_at +# define __NR_name_to_handle_at systemd_NR_name_to_handle_at +# endif +#endif + +#if !HAVE_NAME_TO_HANDLE_AT +struct file_handle { + unsigned int handle_bytes; + int handle_type; + unsigned char f_handle[0]; +}; + +static inline int missing_name_to_handle_at(int fd, const char *name, struct file_handle *handle, int *mnt_id, int flags) { +# ifdef __NR_name_to_handle_at + return syscall(__NR_name_to_handle_at, fd, name, handle, mnt_id, flags); +# else + errno = ENOSYS; + return -1; +# endif +} + +# define name_to_handle_at missing_name_to_handle_at +#endif + +/* ======================================================================= */ + +#if defined __aarch64__ +# define systemd_NR_setns 268 +#elif defined __arm__ +# define systemd_NR_setns 375 +#elif defined __alpha__ +# define systemd_NR_setns 501 +#elif defined(__x86_64__) +# define systemd_NR_setns systemd_SC_arch_bias(308) +#elif defined(__i386__) +# define systemd_NR_setns 346 +#elif defined(__powerpc__) +# define systemd_NR_setns 350 +#elif defined __s390__ || defined __s390x__ +# define systemd_NR_setns 339 +#elif defined(__arc__) +# define systemd_NR_setns 268 +#elif defined _MIPS_SIM +# if _MIPS_SIM == _MIPS_SIM_ABI32 +# define systemd_NR_setns systemd_SC_arch_bias(344) +# elif _MIPS_SIM == _MIPS_SIM_NABI32 +# define systemd_NR_setns systemd_SC_arch_bias(308) +# elif _MIPS_SIM == _MIPS_SIM_ABI64 +# define systemd_NR_setns systemd_SC_arch_bias(303) +# endif +#else +# warning "setns() syscall number unknown for your architecture" +#endif + +/* may be (invalid) negative number due to libseccomp, see PR 13319 */ +#if defined __NR_setns && __NR_setns >= 0 +# if defined systemd_NR_setns +assert_cc(__NR_setns == systemd_NR_setns); +# endif +#else +# if defined __NR_setns +# undef __NR_setns +# endif +# if defined systemd_NR_setns +# define __NR_setns systemd_NR_setns +# endif +#endif + +#if !HAVE_SETNS +static inline int missing_setns(int fd, int nstype) { +# ifdef __NR_setns + return syscall(__NR_setns, fd, nstype); +# else + errno = ENOSYS; + return -1; +# endif +} + +# define setns missing_setns +#endif + +/* ======================================================================= */ + +static inline pid_t raw_getpid(void) { +#if defined(__alpha__) + return (pid_t) syscall(__NR_getxpid); +#else + return (pid_t) syscall(__NR_getpid); +#endif +} + +/* ======================================================================= */ + +#if defined __x86_64__ +# define systemd_NR_renameat2 systemd_SC_arch_bias(316) +#elif defined __arm__ +# define systemd_NR_renameat2 382 +#elif defined __aarch64__ +# define systemd_NR_renameat2 276 +#elif defined __alpha__ +# define systemd_NR_renameat2 510 +#elif defined _MIPS_SIM +# if _MIPS_SIM == _MIPS_SIM_ABI32 +# define systemd_NR_renameat2 systemd_SC_arch_bias(351) +# elif _MIPS_SIM == _MIPS_SIM_NABI32 +# define systemd_NR_renameat2 systemd_SC_arch_bias(315) +# elif _MIPS_SIM == _MIPS_SIM_ABI64 +# define systemd_NR_renameat2 systemd_SC_arch_bias(311) +# endif +#elif defined __i386__ +# define systemd_NR_renameat2 353 +#elif defined __powerpc64__ +# define systemd_NR_renameat2 357 +#elif defined __s390__ || defined __s390x__ +# define systemd_NR_renameat2 347 +#elif defined __arc__ +# define systemd_NR_renameat2 276 +#else +# warning "renameat2() syscall number unknown for your architecture" +#endif + +/* may be (invalid) negative number due to libseccomp, see PR 13319 */ +#if defined __NR_renameat2 && __NR_renameat2 >= 0 +# if defined systemd_NR_renameat2 +assert_cc(__NR_renameat2 == systemd_NR_renameat2); +# endif +#else +# if defined __NR_renameat2 +# undef __NR_renameat2 +# endif +# if defined systemd_NR_renameat2 +# define __NR_renameat2 systemd_NR_renameat2 +# endif +#endif + +#if !HAVE_RENAMEAT2 +static inline int missing_renameat2(int oldfd, const char *oldname, int newfd, const char *newname, unsigned flags) { +# ifdef __NR_renameat2 + return syscall(__NR_renameat2, oldfd, oldname, newfd, newname, flags); +# else + errno = ENOSYS; + return -1; +# endif +} + +# define renameat2 missing_renameat2 +#endif + +/* ======================================================================= */ + +#if !HAVE_KCMP +static inline int missing_kcmp(pid_t pid1, pid_t pid2, int type, unsigned long idx1, unsigned long idx2) { +# if defined __NR_kcmp && __NR_kcmp >= 0 + return syscall(__NR_kcmp, pid1, pid2, type, idx1, idx2); +# else + errno = ENOSYS; + return -1; +# endif +} + +# define kcmp missing_kcmp +#endif + +/* ======================================================================= */ + +#if !HAVE_KEYCTL +static inline long missing_keyctl(int cmd, unsigned long arg2, unsigned long arg3, unsigned long arg4, unsigned long arg5) { +# if defined __NR_keyctl && __NR_keyctl >= 0 + return syscall(__NR_keyctl, cmd, arg2, arg3, arg4, arg5); +# else + errno = ENOSYS; + return -1; +# endif + +# define keyctl missing_keyctl +} + +static inline key_serial_t missing_add_key(const char *type, const char *description, const void *payload, size_t plen, key_serial_t ringid) { +# if defined __NR_add_key && __NR_add_key >= 0 + return syscall(__NR_add_key, type, description, payload, plen, ringid); +# else + errno = ENOSYS; + return -1; +# endif + +# define add_key missing_add_key +} + +static inline key_serial_t missing_request_key(const char *type, const char *description, const char * callout_info, key_serial_t destringid) { +# if defined __NR_request_key && __NR_request_key >= 0 + return syscall(__NR_request_key, type, description, callout_info, destringid); +# else + errno = ENOSYS; + return -1; +# endif + +# define request_key missing_request_key +} +#endif + +/* ======================================================================= */ + +#if defined(__x86_64__) +# define systemd_NR_copy_file_range systemd_SC_arch_bias(326) +#elif defined(__i386__) +# define systemd_NR_copy_file_range 377 +#elif defined __s390__ +# define systemd_NR_copy_file_range 375 +#elif defined __arm__ +# define systemd_NR_copy_file_range 391 +#elif defined __aarch64__ +# define systemd_NR_copy_file_range 285 +#elif defined __alpha__ +# define systemd_NR_copy_file_range 519 +#elif defined __powerpc__ +# define systemd_NR_copy_file_range 379 +#elif defined __arc__ +# define systemd_NR_copy_file_range 285 +#elif defined _MIPS_SIM +# if _MIPS_SIM == _MIPS_SIM_ABI32 +# define systemd_NR_copy_file_range systemd_SC_arch_bias(360) +# elif _MIPS_SIM == _MIPS_SIM_NABI32 +# define systemd_NR_copy_file_range systemd_SC_arch_bias(324) +# elif _MIPS_SIM == _MIPS_SIM_ABI64 +# define systemd_NR_copy_file_range systemd_SC_arch_bias(320) +# endif +#else +# warning "copy_file_range() syscall number unknown for your architecture" +#endif + +/* may be (invalid) negative number due to libseccomp, see PR 13319 */ +#if defined __NR_copy_file_range && __NR_copy_file_range >= 0 +# if defined systemd_NR_copy_file_range +assert_cc(__NR_copy_file_range == systemd_NR_copy_file_range); +# endif +#else +# if defined __NR_copy_file_range +# undef __NR_copy_file_range +# endif +# if defined systemd_NR_copy_file_range +# define __NR_copy_file_range systemd_NR_copy_file_range +# endif +#endif + +#if !HAVE_COPY_FILE_RANGE +static inline ssize_t missing_copy_file_range(int fd_in, loff_t *off_in, + int fd_out, loff_t *off_out, + size_t len, + unsigned int flags) { +# ifdef __NR_copy_file_range + return syscall(__NR_copy_file_range, fd_in, off_in, fd_out, off_out, len, flags); +# else + errno = ENOSYS; + return -1; +# endif +} + +# define copy_file_range missing_copy_file_range +#endif + +/* ======================================================================= */ + +#if defined __i386__ +# define systemd_NR_bpf 357 +#elif defined __x86_64__ +# define systemd_NR_bpf systemd_SC_arch_bias(321) +#elif defined __aarch64__ +# define systemd_NR_bpf 280 +#elif defined __arm__ +# define systemd_NR_bpf 386 +#elif defined __alpha__ +# define systemd_NR_bpf 515 +#elif defined(__powerpc__) +# define systemd_NR_bpf 361 +#elif defined __sparc__ +# define systemd_NR_bpf 349 +#elif defined __s390__ +# define systemd_NR_bpf 351 +#elif defined __tilegx__ +# define systemd_NR_bpf 280 +#elif defined _MIPS_SIM +# if _MIPS_SIM == _MIPS_SIM_ABI32 +# define systemd_NR_bpf systemd_SC_arch_bias(355) +# elif _MIPS_SIM == _MIPS_SIM_NABI32 +# define systemd_NR_bpf systemd_SC_arch_bias(319) +# elif _MIPS_SIM == _MIPS_SIM_ABI64 +# define systemd_NR_bpf systemd_SC_arch_bias(315) +# endif +#else +# warning "bpf() syscall number unknown for your architecture" +#endif + +/* may be (invalid) negative number due to libseccomp, see PR 13319 */ +#if defined __NR_bpf && __NR_bpf >= 0 +# if defined systemd_NR_bpf +assert_cc(__NR_bpf == systemd_NR_bpf); +# endif +#else +# if defined __NR_bpf +# undef __NR_bpf +# endif +# if defined systemd_NR_bpf +# define __NR_bpf systemd_NR_bpf +# endif +#endif + +#if !HAVE_BPF +union bpf_attr; + +static inline int missing_bpf(int cmd, union bpf_attr *attr, size_t size) { +#ifdef __NR_bpf + return (int) syscall(__NR_bpf, cmd, attr, size); +#else + errno = ENOSYS; + return -1; +#endif +} + +# define bpf missing_bpf +#endif + +/* ======================================================================= */ + +#ifndef __IGNORE_pkey_mprotect +# if defined __i386__ +# define systemd_NR_pkey_mprotect 380 +# elif defined __x86_64__ +# define systemd_NR_pkey_mprotect systemd_SC_arch_bias(329) +# elif defined __aarch64__ +# define systemd_NR_pkey_mprotect 288 +# elif defined __arm__ +# define systemd_NR_pkey_mprotect 394 +# elif defined __alpha__ +# define systemd_NR_pkey_mprotect 524 +# elif defined __powerpc__ +# define systemd_NR_pkey_mprotect 386 +# elif defined __s390__ +# define systemd_NR_pkey_mprotect 384 +# elif defined _MIPS_SIM +# if _MIPS_SIM == _MIPS_SIM_ABI32 +# define systemd_NR_pkey_mprotect systemd_SC_arch_bias(363) +# elif _MIPS_SIM == _MIPS_SIM_NABI32 +# define systemd_NR_pkey_mprotect systemd_SC_arch_bias(327) +# elif _MIPS_SIM == _MIPS_SIM_ABI64 +# define systemd_NR_pkey_mprotect systemd_SC_arch_bias(323) +# endif +# else +# warning "pkey_mprotect() syscall number unknown for your architecture" +# endif + +/* may be (invalid) negative number due to libseccomp, see PR 13319 */ +# if defined __NR_pkey_mprotect && __NR_pkey_mprotect >= 0 +# if defined systemd_NR_pkey_mprotect +assert_cc(__NR_pkey_mprotect == systemd_NR_pkey_mprotect); +# endif +# else +# if defined __NR_pkey_mprotect +# undef __NR_pkey_mprotect +# endif +# if defined systemd_NR_pkey_mprotect +# define __NR_pkey_mprotect systemd_NR_pkey_mprotect +# endif +# endif +#endif + +/* ======================================================================= */ + +#if defined __aarch64__ +# define systemd_NR_statx 291 +#elif defined __arm__ +# define systemd_NR_statx 397 +#elif defined __alpha__ +# define systemd_NR_statx 522 +#elif defined __i386__ || defined __powerpc64__ +# define systemd_NR_statx 383 +#elif defined __s390__ || defined __s390x__ +# define systemd_NR_statx 379 +#elif defined __sparc__ +# define systemd_NR_statx 360 +#elif defined __x86_64__ +# define systemd_NR_statx systemd_SC_arch_bias(332) +#elif defined _MIPS_SIM +# if _MIPS_SIM == _MIPS_SIM_ABI32 +# define systemd_NR_statx systemd_SC_arch_bias(366) +# elif _MIPS_SIM == _MIPS_SIM_NABI32 +# define systemd_NR_statx systemd_SC_arch_bias(330) +# elif _MIPS_SIM == _MIPS_SIM_ABI64 +# define systemd_NR_statx systemd_SC_arch_bias(326) +# endif +#else +# warning "statx() syscall number unknown for your architecture" +#endif + +/* may be (invalid) negative number due to libseccomp, see PR 13319 */ +#if defined __NR_statx && __NR_statx >= 0 +# if defined systemd_NR_statx +assert_cc(__NR_statx == systemd_NR_statx); +# endif +#else +# if defined __NR_statx +# undef __NR_statx +# endif +# if defined systemd_NR_statx +# define __NR_statx systemd_NR_statx +# endif +#endif + +#if !HAVE_STATX +struct statx; + +static inline ssize_t missing_statx(int dfd, const char *filename, unsigned flags, unsigned int mask, struct statx *buffer) { +# ifdef __NR_statx + return syscall(__NR_statx, dfd, filename, flags, mask, buffer); +# else + errno = ENOSYS; + return -1; +# endif +} +#endif + +/* This typedef is supposed to be always defined. */ +typedef struct statx struct_statx; + +#if !HAVE_STATX +# define statx(dfd, filename, flags, mask, buffer) missing_statx(dfd, filename, flags, mask, buffer) +#endif + +/* ======================================================================= */ + +#if !HAVE_SET_MEMPOLICY +enum { + MPOL_DEFAULT, + MPOL_PREFERRED, + MPOL_BIND, + MPOL_INTERLEAVE, + MPOL_LOCAL, +}; + +static inline long missing_set_mempolicy(int mode, const unsigned long *nodemask, + unsigned long maxnode) { + long i; +# if defined __NR_set_mempolicy && __NR_set_mempolicy >= 0 + i = syscall(__NR_set_mempolicy, mode, nodemask, maxnode); +# else + errno = ENOSYS; + i = -1; +# endif + return i; +} + +# define set_mempolicy missing_set_mempolicy +#endif + +#if !HAVE_GET_MEMPOLICY +static inline long missing_get_mempolicy(int *mode, unsigned long *nodemask, + unsigned long maxnode, void *addr, + unsigned long flags) { + long i; +# if defined __NR_get_mempolicy && __NR_get_mempolicy >= 0 + i = syscall(__NR_get_mempolicy, mode, nodemask, maxnode, addr, flags); +# else + errno = ENOSYS; + i = -1; +# endif + return i; +} + +# define get_mempolicy missing_get_mempolicy +#endif + +/* ======================================================================= */ + +/* should be always defined, see kernel 39036cd2727395c3369b1051005da74059a85317 */ +#define systemd_NR_pidfd_send_signal systemd_SC_arch_bias(424) + +/* may be (invalid) negative number due to libseccomp, see PR 13319 */ +#if defined __NR_pidfd_send_signal && __NR_pidfd_send_signal >= 0 +# if defined systemd_NR_pidfd_send_signal +assert_cc(__NR_pidfd_send_signal == systemd_NR_pidfd_send_signal); +# endif +#else +# if defined __NR_pidfd_send_signal +# undef __NR_pidfd_send_signal +# endif +# define __NR_pidfd_send_signal systemd_NR_pidfd_send_signal +#endif + +#if !HAVE_PIDFD_SEND_SIGNAL +static inline int missing_pidfd_send_signal(int fd, int sig, siginfo_t *info, unsigned flags) { +# ifdef __NR_pidfd_send_signal + return syscall(__NR_pidfd_send_signal, fd, sig, info, flags); +# else + errno = ENOSYS; + return -1; +# endif +} + +# define pidfd_send_signal missing_pidfd_send_signal +#endif + +/* should be always defined, see kernel 7615d9e1780e26e0178c93c55b73309a5dc093d7 */ +#define systemd_NR_pidfd_open systemd_SC_arch_bias(434) + +/* may be (invalid) negative number due to libseccomp, see PR 13319 */ +#if defined __NR_pidfd_open && __NR_pidfd_open >= 0 +# if defined systemd_NR_pidfd_open +assert_cc(__NR_pidfd_open == systemd_NR_pidfd_open); +# endif +#else +# if defined __NR_pidfd_open +# undef __NR_pidfd_open +# endif +# define __NR_pidfd_open systemd_NR_pidfd_open +#endif + +#if !HAVE_PIDFD_OPEN +static inline int missing_pidfd_open(pid_t pid, unsigned flags) { +# ifdef __NR_pidfd_open + return syscall(__NR_pidfd_open, pid, flags); +# else + errno = ENOSYS; + return -1; +# endif +} + +# define pidfd_open missing_pidfd_open +#endif + +/* ======================================================================= */ + +#if !HAVE_RT_SIGQUEUEINFO +static inline int missing_rt_sigqueueinfo(pid_t tgid, int sig, siginfo_t *info) { +# if defined __NR_rt_sigqueueinfo && __NR_rt_sigqueueinfo >= 0 + return syscall(__NR_rt_sigqueueinfo, tgid, sig, info); +# else +# error "__NR_rt_sigqueueinfo not defined" +# endif +} + +# define rt_sigqueueinfo missing_rt_sigqueueinfo +#endif + +/* ======================================================================= */ + +#define systemd_NR_close_range systemd_SC_arch_bias(436) + +/* may be (invalid) negative number due to libseccomp, see PR 13319 */ +#if defined __NR_close_range && __NR_close_range >= 0 +# if defined systemd_NR_close_range +assert_cc(__NR_close_range == systemd_NR_close_range); +# endif +#else +# if defined __NR_close_range +# undef __NR_close_range +# endif +# if defined systemd_NR_close_range +# define __NR_close_range systemd_NR_close_range +# endif +#endif + +#if !HAVE_CLOSE_RANGE +static inline int missing_close_range(int first_fd, int end_fd, unsigned flags) { +# ifdef __NR_close_range + /* Kernel-side the syscall expects fds as unsigned integers (just like close() actually), while + * userspace exclusively uses signed integers for fds. We don't know just yet how glibc is going to + * wrap this syscall, but let's assume it's going to be similar to what they do for close(), + * i.e. make the same unsigned → signed type change from the raw kernel syscall compared to the + * userspace wrapper. There's only one caveat for this: unlike for close() there's the special + * UINT_MAX fd value for the 'end_fd' argument. Let's safely map that to -1 here. And let's refuse + * any other negative values. */ + if ((first_fd < 0) || (end_fd < 0 && end_fd != -1)) { + errno = -EBADF; + return -1; + } + + return syscall(__NR_close_range, + (unsigned) first_fd, + end_fd == -1 ? UINT_MAX : (unsigned) end_fd, /* Of course, the compiler should figure out that this is the identity mapping IRL */ + flags); +# else + errno = ENOSYS; + return -1; +# endif +} + +# define close_range missing_close_range +#endif |