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| author | Jan Kratochvil <jan.kratochvil@redhat.com> | 2014-02-22 21:06:49 +0100 |
|---|---|---|
| committer | Jan Kratochvil <jan.kratochvil@redhat.com> | 2014-02-22 22:05:04 +0100 |
| commit | 25a2c8477e8bc165a7c78719e7f0f30514abfc57 (patch) | |
| tree | 620ec2a62487b104792212527395ed552f29d2e9 /libdwfl/dwfl_module_getdwarf.c | |
| parent | 112bcc0bebc8c3499acc67d04f292b3908e4fbcc (diff) | |
| download | elfutils-25a2c8477e8bc165a7c78719e7f0f30514abfc57.tar.gz | |
Access deleted files by /dev/PID/mem.jankratochvil/devmem
libdwfl/
2014-02-22 Jan Kratochvil <jan.kratochvil@redhat.com>
Access deleted files by /dev/PID/mem.
* dwfl_module.c (dwfl_report_module_pid): New function.
* dwfl_module_getdwarf.c (open_elf): Call __libdw_open_file_at_offset.
* libdwfl.h (dwfl_report_module_pid): New declaration.
* libdwflP.h (struct Dwfl_Module): New field pid.
(INTDECL (dwfl_report_module_pid)): New.
* linux-proc-maps.c (proc_maps_report): New variable first_high.
(proc_maps_report) (report): Possibly call dwfl_report_module_pid.
tests/
2014-02-22 Jan Kratochvil <jan.kratochvil@redhat.com>
Access deleted files by /dev/PID/mem.
* Makefile.am (check_PROGRAMS): Add deleted and deleted-lib.so.
(TESTS, EXTRA_DIST): Add run-deleted.sh.
(deleted_LDADD, deleted_lib_so_LDFLAGS, deleted_lib_so_CFLAGS): New.
* deleted-lib.c: New file.
* deleted.c: New file.
* run-deleted.sh: New file.
Signed-off-by: Jan Kratochvil <jan.kratochvil@redhat.com>
Diffstat (limited to 'libdwfl/dwfl_module_getdwarf.c')
| -rw-r--r-- | libdwfl/dwfl_module_getdwarf.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/libdwfl/dwfl_module_getdwarf.c b/libdwfl/dwfl_module_getdwarf.c index c4bd7395..d667513f 100644 --- a/libdwfl/dwfl_module_getdwarf.c +++ b/libdwfl/dwfl_module_getdwarf.c @@ -45,6 +45,16 @@ open_elf (Dwfl_Module *mod, struct dwfl_file *file) set it with an open failure below. */ errno = 0; + off_t start_offset = 0; + size_t maximum_size = ~((size_t) 0); + if (mod->pid != 0 && file == &mod->main) + { + if (asprintf (&file->name, "/proc/%d/mem", mod->pid) < 0) + return CBFAIL; + start_offset = mod->low_addr; + maximum_size = mod->high_addr - mod->low_addr; + } + /* If there was a pre-primed file name left that the callback left behind, try to open that file name. */ if (file->fd < 0 && file->name != NULL) @@ -53,7 +63,10 @@ open_elf (Dwfl_Module *mod, struct dwfl_file *file) if (file->fd < 0) return CBFAIL; - Dwfl_Error error = __libdw_open_file (&file->fd, &file->elf, true, false); + Dwfl_Error error = __libdw_open_file_at_offset (&file->fd, &file->elf, + start_offset, + maximum_size, + true, false); if (error != DWFL_E_NOERROR) return error; } |