Add MAP_FIXED_NOREPLACE from Linux 4.17 to bits/mman.h
Commit Message
Linux 4.17 adds MAP_FIXED_NOREPLACE (value 0x100000 on most
architectures, 0x200000 on alpha). This patch adds that macro to
glibc's bits/mman.h headers.
Tested for x86_64.
2018-06-04 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/aarch64/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): New macro.
* sysdeps/unix/sysv/linux/alpha/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/arm/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/hppa/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/ia64/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/m68k/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/microblaze/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/mips/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/nios2/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/riscv/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/s390/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/sh/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
* sysdeps/unix/sysv/linux/x86/bits/mman.h [__USE_MISC]
(MAP_FIXED_NOREPLACE): Likewise.
Comments
On 06/04/2018 11:29 PM, Joseph Myers wrote:
> Linux 4.17 adds MAP_FIXED_NOREPLACE (value 0x100000 on most
> architectures, 0x200000 on alpha). This patch adds that macro to
> glibc's bits/mman.h headers.
Patch looks good to me. Thanks.
Florian
@@ -38,6 +38,8 @@
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
# define MAP_SYNC 0x80000 /* Perform synchronous page
faults for the mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
@@ -36,6 +36,8 @@
# define MAP_NONBLOCK 0x40000 /* Do not block on IO. */
# define MAP_STACK 0x80000 /* Allocation is for a stack. */
# define MAP_HUGETLB 0x100000 /* Create huge page mapping. */
+# define MAP_FIXED_NOREPLACE 0x200000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Flags for `mlockall'. */
@@ -36,6 +36,8 @@
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
# define MAP_SYNC 0x80000 /* Perform synchronous page
faults for the mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Include generic Linux declarations. */
@@ -62,6 +62,8 @@
# define MAP_NONBLOCK 0x20000 /* Do not block on IO */
# define MAP_STACK 0x40000 /* Create for process/thread stacks */
# define MAP_HUGETLB 0x80000 /* Create a huge page mapping */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Flags to "msync" */
@@ -37,6 +37,8 @@
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
# define MAP_SYNC 0x80000 /* Perform synchronous page
faults for the mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Include generic Linux declarations. */
@@ -36,6 +36,8 @@
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
# define MAP_SYNC 0x80000 /* Perform synchronous page
faults for the mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Include generic Linux declarations. */
@@ -38,6 +38,8 @@
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
# define MAP_SYNC 0x80000 /* Perform synchronous page
faults for the mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Include generic Linux declarations. */
@@ -34,6 +34,8 @@
# define MAP_NONBLOCK 0x20000 /* do not block on IO */
# define MAP_STACK 0x40000 /* Allocation is for a stack. */
# define MAP_HUGETLB 0x80000 /* Create huge page mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
#define __MAP_ANONYMOUS 0x0800
@@ -38,6 +38,8 @@
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
# define MAP_SYNC 0x80000 /* Perform synchronous page
faults for the mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Include generic Linux declarations. */
@@ -36,6 +36,8 @@
# define MAP_NONBLOCK 0x10000 /* Do not block on IO. */
# define MAP_STACK 0x20000 /* Allocation is for a stack. */
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Flags for `mlockall'. */
@@ -32,6 +32,8 @@
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
# define MAP_SYNC 0x80000 /* Perform synchronous page
faults for the mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Include generic Linux declarations. */
@@ -37,6 +37,8 @@
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
# define MAP_SYNC 0x80000 /* Perform synchronous page
faults for the mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Include generic Linux declarations. */
@@ -36,6 +36,8 @@
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
# define MAP_SYNC 0x80000 /* Perform synchronous page
faults for the mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Include generic Linux declarations. */
@@ -36,6 +36,8 @@
# define MAP_NONBLOCK 0x10000 /* Do not block on IO. */
# define MAP_STACK 0x20000 /* Allocation is for a stack. */
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Flags for `mlockall'. */
@@ -41,6 +41,8 @@
# define MAP_HUGETLB 0x40000 /* Create huge page mapping. */
# define MAP_SYNC 0x80000 /* Perform synchronous page
faults for the mapping. */
+# define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED but do not unmap
+ underlying mapping. */
#endif
/* Include generic Linux declarations. */