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Diffstat (limited to 'upstream/opensuse-tumbleweed/man5/proc_pid_maps.5')
| -rw-r--r-- | upstream/opensuse-tumbleweed/man5/proc_pid_maps.5 | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/upstream/opensuse-tumbleweed/man5/proc_pid_maps.5 b/upstream/opensuse-tumbleweed/man5/proc_pid_maps.5 new file mode 100644 index 00000000..1d54b4dd --- /dev/null +++ b/upstream/opensuse-tumbleweed/man5/proc_pid_maps.5 @@ -0,0 +1,156 @@ +.\" Copyright (C) 1994, 1995, Daniel Quinlan <quinlan@yggdrasil.com> +.\" Copyright (C) 2002-2008, 2017, Michael Kerrisk <mtk.manpages@gmail.com> +.\" Copyright (C) 2023, Alejandro Colomar <alx@kernel.org> +.\" +.\" SPDX-License-Identifier: GPL-3.0-or-later +.\" +.TH proc_pid_maps 5 2024-05-02 "Linux man-pages (unreleased)" +.SH NAME +/proc/pid/maps \- mapped memory regions +.SH DESCRIPTION +.TP +.IR /proc/ pid /maps +A file containing the currently mapped memory regions and their access +permissions. +See +.BR mmap (2) +for some further information about memory mappings. +.IP +Permission to access this file is governed by a ptrace access mode +.B PTRACE_MODE_READ_FSCREDS +check; see +.BR ptrace (2). +.IP +The format of the file is: +.IP +.in +4n +.EX +.I "address perms offset dev inode pathname" +00400000\-00452000 r\-xp 00000000 08:02 173521 /usr/bin/dbus\-daemon +00651000\-00652000 r\-\-p 00051000 08:02 173521 /usr/bin/dbus\-daemon +00652000\-00655000 rw\-p 00052000 08:02 173521 /usr/bin/dbus\-daemon +00e03000\-00e24000 rw\-p 00000000 00:00 0 [heap] +00e24000\-011f7000 rw\-p 00000000 00:00 0 [heap] +\&... +35b1800000\-35b1820000 r\-xp 00000000 08:02 135522 /usr/lib64/ld\-2.15.so +35b1a1f000\-35b1a20000 r\-\-p 0001f000 08:02 135522 /usr/lib64/ld\-2.15.so +35b1a20000\-35b1a21000 rw\-p 00020000 08:02 135522 /usr/lib64/ld\-2.15.so +35b1a21000\-35b1a22000 rw\-p 00000000 00:00 0 +35b1c00000\-35b1dac000 r\-xp 00000000 08:02 135870 /usr/lib64/libc\-2.15.so +35b1dac000\-35b1fac000 \-\-\-p 001ac000 08:02 135870 /usr/lib64/libc\-2.15.so +35b1fac000\-35b1fb0000 r\-\-p 001ac000 08:02 135870 /usr/lib64/libc\-2.15.so +35b1fb0000\-35b1fb2000 rw\-p 001b0000 08:02 135870 /usr/lib64/libc\-2.15.so +\&... +f2c6ff8c000\-7f2c7078c000 rw\-p 00000000 00:00 0 [stack:986] +\&... +7fffb2c0d000\-7fffb2c2e000 rw\-p 00000000 00:00 0 [stack] +7fffb2d48000\-7fffb2d49000 r\-xp 00000000 00:00 0 [vdso] +.EE +.in +.IP +The +.I address +field is the address space in the process that the mapping occupies. +The +.I perms +field is a set of permissions: +.IP +.in +4n +.EX +r = read +w = write +x = execute +s = shared +p = private (copy on write) +.EE +.in +.IP +The +.I offset +field is the offset into the file/whatever; +.I dev +is the device +(major:minor); +.I inode +is the inode on that device. +0 indicates that no inode is associated with the memory region, +as would be the case with BSS (uninitialized data). +.IP +The +.I pathname +field will usually be the file that is backing the mapping. +For ELF files, +you can easily coordinate with the +.I offset +field by looking at the +Offset field in the ELF program headers +.RI ( "readelf\ \-l" ). +.IP +There are additional helpful pseudo-paths: +.RS +.TP +.I [stack] +The initial process's (also known as the main thread's) stack. +.TP +.IR [stack: tid ] " (from Linux 3.4 to Linux 4.4)" +.\" commit b76437579d1344b612cf1851ae610c636cec7db0 (added) +.\" commit 65376df582174ffcec9e6471bf5b0dd79ba05e4a (removed) +A thread's stack (where the +.I tid +is a thread ID). +It corresponds to the +.IR /proc/ pid /task/ tid / +path. +This field was removed in Linux 4.5, since providing this information +for a process with large numbers of threads is expensive. +.TP +.I [vdso] +The virtual dynamically linked shared object. +See +.BR vdso (7). +.TP +.I [heap] +The process's heap. +.TP +.IR [anon: name ] " (since Linux 5.17)" +.\" Commit 9a10064f5625d5572c3626c1516e0bebc6c9fe9b +A named private anonymous mapping. +Set with +.BR prctl (2) +.BR PR_SET_VMA_ANON_NAME . +.TP +.IR [anon_shmem: name ] " (since Linux 6.2)" +.\" Commit d09e8ca6cb93bb4b97517a18fbbf7eccb0e9ff43 +A named shared anonymous mapping. +Set with +.BR prctl (2) +.BR PR_SET_VMA_ANON_NAME . +.in +.RE +.IP +If the +.I pathname +field is blank, +this is an anonymous mapping as obtained via +.BR mmap (2). +There is no easy way to coordinate this back to a process's source, +short of running it through +.BR gdb (1), +.BR strace (1), +or similar. +.IP +.I pathname +is shown unescaped except for newline characters, which are replaced +with an octal escape sequence. +As a result, it is not possible to determine whether the original +pathname contained a newline character or the literal +.I \e012 +character sequence. +.IP +If the mapping is file-backed and the file has been deleted, the string +" (deleted)" is appended to the pathname. +Note that this is ambiguous too. +.IP +Under Linux 2.0, there is no field giving pathname. +.SH SEE ALSO +.BR proc (5) |