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author | Florian Weimer <fweimer@redhat.com> | 2022-05-04 15:37:21 +0200 |
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committer | Florian Weimer <fweimer@redhat.com> | 2022-05-04 15:37:21 +0200 |
commit | c1b68685d438373efe64e5f076f4215723004dfb (patch) | |
tree | 6c7c71e7d65e4f200a889b396ffc150e3bbb64fc /sysdeps/unix/sysv | |
parent | 60f0f2130d30cfd008ca39743027f1e200592dff (diff) | |
download | glibc-c1b68685d438373efe64e5f076f4215723004dfb.zip glibc-c1b68685d438373efe64e5f076f4215723004dfb.tar.gz glibc-c1b68685d438373efe64e5f076f4215723004dfb.tar.bz2 |
Linux: Define MMAP_CALL_INTERNAL
Unlike MMAP_CALL, this avoids a TCB dependency for an errno update
on failure.
<mmap_internal.h> cannot be included as is on several architectures
due to the definition of page_unit, so introduce a separate header
file for the definition of MMAP_CALL and MMAP_CALL_INTERNAL,
<mmap_call.h>.
Reviewed-by: Stefan Liebler <stli@linux.ibm.com>
Diffstat (limited to 'sysdeps/unix/sysv')
-rw-r--r-- | sysdeps/unix/sysv/linux/mmap_call.h | 22 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/mmap_internal.h | 6 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/s390/mmap_call.h (renamed from sysdeps/unix/sysv/linux/s390/mmap_internal.h) | 14 |
3 files changed, 30 insertions, 12 deletions
diff --git a/sysdeps/unix/sysv/linux/mmap_call.h b/sysdeps/unix/sysv/linux/mmap_call.h new file mode 100644 index 0000000..3547c99 --- /dev/null +++ b/sysdeps/unix/sysv/linux/mmap_call.h @@ -0,0 +1,22 @@ +/* Generic definition of MMAP_CALL and MMAP_CALL_INTERNAL. + Copyright (C) 2017-2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#define MMAP_CALL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \ + INLINE_SYSCALL_CALL (__nr, __addr, __len, __prot, __flags, __fd, __offset) +#define MMAP_CALL_INTERNAL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \ + INTERNAL_SYSCALL_CALL (__nr, __addr, __len, __prot, __flags, __fd, __offset) diff --git a/sysdeps/unix/sysv/linux/mmap_internal.h b/sysdeps/unix/sysv/linux/mmap_internal.h index 841b731..aebf97d 100644 --- a/sysdeps/unix/sysv/linux/mmap_internal.h +++ b/sysdeps/unix/sysv/linux/mmap_internal.h @@ -42,10 +42,6 @@ static uint64_t page_unit; /* Do not accept offset not multiple of page size. */ #define MMAP_OFF_LOW_MASK (MMAP2_PAGE_UNIT - 1) -/* An architecture may override this. */ -#ifndef MMAP_CALL -# define MMAP_CALL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \ - INLINE_SYSCALL_CALL (__nr, __addr, __len, __prot, __flags, __fd, __offset) -#endif +#include <mmap_call.h> #endif /* MMAP_INTERNAL_LINUX_H */ diff --git a/sysdeps/unix/sysv/linux/s390/mmap_internal.h b/sysdeps/unix/sysv/linux/s390/mmap_call.h index cc76ac9..f169b8b 100644 --- a/sysdeps/unix/sysv/linux/s390/mmap_internal.h +++ b/sysdeps/unix/sysv/linux/s390/mmap_call.h @@ -16,9 +16,6 @@ License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ -#ifndef MMAP_S390_INTERNAL_H -# define MMAP_S390_INTERNAL_H - #define MMAP_CALL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \ ({ \ long int __args[6] = { (long int) (__addr), (long int) (__len), \ @@ -26,7 +23,10 @@ (long int) (__fd), (long int) (__offset) }; \ INLINE_SYSCALL_CALL (__nr, __args); \ }) - -#include_next <mmap_internal.h> - -#endif +#define MMAP_CALL_INTERNAL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \ + ({ \ + long int __args[6] = { (long int) (__addr), (long int) (__len), \ + (long int) (__prot), (long int) (__flags), \ + (long int) (__fd), (long int) (__offset) }; \ + INTERNAL_SYSCALL_CALL (__nr, __args); \ + }) |