1 /* Linux/i386 definitions of functions used by static libc main startup. 2 Copyright (C) 2017-2021 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #if BUILD_PIE_DEFAULT 20 /* Can't use "call *%gs:SYSINFO_OFFSET" during statup in static PIE. */ 21 # define I386_USE_SYSENTER 0 22 23 # include <sysdep.h> 24 # include <abort-instr.h> 25 26 __attribute__ ((__noreturn__)) 27 static inline void _startup_fatal(const char * message)28_startup_fatal (const char *message __attribute__ ((unused))) 29 { 30 /* This is only called very early during startup in static PIE. 31 FIXME: How can it be improved? */ 32 ABORT_INSTRUCTION; 33 __builtin_unreachable (); 34 } 35 36 static inline uid_t startup_getuid(void)37startup_getuid (void) 38 { 39 return (uid_t) INTERNAL_SYSCALL_CALL (getuid32); 40 } 41 42 static inline uid_t startup_geteuid(void)43startup_geteuid (void) 44 { 45 return (uid_t) INTERNAL_SYSCALL_CALL (geteuid32); 46 } 47 48 static inline gid_t startup_getgid(void)49startup_getgid (void) 50 { 51 return (gid_t) INTERNAL_SYSCALL_CALL (getgid32); 52 } 53 54 static inline gid_t startup_getegid(void)55startup_getegid (void) 56 { 57 return (gid_t) INTERNAL_SYSCALL_CALL (getegid32); 58 } 59 #else 60 # include_next <startup.h> 61 #endif 62