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Observe mmap operations performed by the dynamic linker by running "gdb -x observe-maps-on-mmap.py"
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| == malloc() | |
| _dl_init_paths() | |
| Catchpoint 1 (syscalls 'mmap' [9] 'mprotect' [10] 'munmap' [11]) | |
| Breakpoint 2 at 0x1650: file src/true.c, line 59. | |
| Catchpoint 1 (call to syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -1,6 +1,7 @@ | |
| 555555554000-55555555a000 r-xp 00000000 08:03 198934 /usr/bin/true | |
| 555555759000-55555575b000 rw-p 00005000 08:03 198934 /usr/bin/true | |
| 7ffff7ddc000-7ffff7dfd000 r-xp 00000000 08:03 529029 /usr/lib64/ld-2.22.so | |
| +7ffff7ff7000-7ffff7ff8000 rw-p 00000000 00:00 0 | |
| 7ffff7ff8000-7ffff7ffa000 r--p 00000000 00:00 0 [vvar] | |
| 7ffff7ffa000-7ffff7ffc000 r-xp 00000000 00:00 0 [vdso] | |
| 7ffff7ffc000-7ffff7ffe000 rw-p 00020000 08:03 529029 /usr/lib64/ld-2.22.so | |
| #0 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7df412e in __libc_memalign (align=align@entry=8, n=n@entry=1600) at dl-minimal.c:78 | |
| #2 0x00007ffff7df41bd in malloc (n=n@entry=1600) at dl-minimal.c:95 | |
| #3 0x00007ffff7de3d92 in _dl_init_paths (llp=0x0) at dl-load.c:689 | |
| #4 0x00007ffff7ddef07 in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:1190 | |
| #5 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #6 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #7 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #8 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #9 0x0000000000000001 in ?? () | |
| #10 0x00007fffffffdb0e in ?? () | |
| #11 0x0000000000000000 in ?? () | |
| == map in ld.so.cache | |
| _dl_load_cache_lookup() | |
| Catchpoint 1 (call to syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -1,6 +1,7 @@ | |
| 555555554000-55555555a000 r-xp 00000000 08:03 198934 /usr/bin/true | |
| 555555759000-55555575b000 rw-p 00005000 08:03 198934 /usr/bin/true | |
| 7ffff7ddc000-7ffff7dfd000 r-xp 00000000 08:03 529029 /usr/lib64/ld-2.22.so | |
| +7ffff7fb3000-7ffff7ff7000 r--p 00000000 08:03 154196 /etc/ld.so.cache | |
| 7ffff7ff7000-7ffff7ff8000 rw-p 00000000 00:00 0 | |
| 7ffff7ff8000-7ffff7ffa000 r--p 00000000 00:00 0 [vvar] | |
| 7ffff7ffa000-7ffff7ffc000 r-xp 00000000 00:00 0 [vdso] | |
| #0 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7dec5a5 in _dl_sysdep_read_whole_file (file=file@entry=0x7ffff7df8761 "/etc/ld.so.cache", sizep=sizep@entry=0x7ffff7ffe080 <cachesize>, prot=prot@entry=1) at dl-misc.c:62 | |
| #2 0x00007ffff7df309c in _dl_load_cache_lookup (name=name@entry=0x5555555548b1 "libc.so.6") at dl-cache.c:199 | |
| #3 0x00007ffff7de484f in _dl_map_object (loader=0x7ffff7ffe148, name=0x5555555548b1 "libc.so.6", type=1, trace_mode=0, mode=0, nsid=<optimized out>) at dl-load.c:2066 | |
| #4 0x00007ffff7de8e42 in openaux (a=a@entry=0x7fffffffd4d8) at dl-deps.c:63 | |
| #5 0x00007ffff7deb604 in _dl_catch_error (objname=objname@entry=0x7fffffffd4d0, errstring=errstring@entry=0x7fffffffd4c8, mallocedp=mallocedp@entry=0x7fffffffd4c7, operate=operate@entry=0x7ffff7de8e10 <openaux>, args=args@entry=0x7fffffffd4d8) at dl-error.c:187 | |
| #6 0x00007ffff7de9473 in _dl_map_object_deps (map=map@entry=0x7ffff7ffe148, preloads=<optimized out>, npreloads=npreloads@entry=0, trace_mode=trace_mode@entry=0, open_mode=open_mode@entry=0) at dl-deps.c:254 | |
| #7 0x00007ffff7ddf0d8 in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:1604 | |
| #8 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #9 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #10 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #11 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #12 0x0000000000000001 in ?? () | |
| #13 0x00007fffffffdb0e in ?? () | |
| #14 0x0000000000000000 in ?? () | |
| == map in DT_NEEDED | |
| _dl_map_object_deps() | |
| Catchpoint 1 (call to syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -1,5 +1,6 @@ | |
| 555555554000-55555555a000 r-xp 00000000 08:03 198934 /usr/bin/true | |
| 555555759000-55555575b000 rw-p 00005000 08:03 198934 /usr/bin/true | |
| +7ffff7a1b000-7ffff7ddc000 r-xp 00000000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7ddc000-7ffff7dfd000 r-xp 00000000 08:03 529029 /usr/lib64/ld-2.22.so | |
| 7ffff7fb3000-7ffff7ff7000 r--p 00000000 08:03 154196 /etc/ld.so.cache | |
| 7ffff7ff7000-7ffff7ff8000 rw-p 00000000 00:00 0 | |
| #0 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7de214f in _dl_map_segments (loader=0x7fffffffce90, has_holes=true, maplength=3934784, nloadcmds=2, loadcmds=0x7fffffffcb60, type=<optimized out>, header=0x7fffffffcf20, fd=3, l=0x7ffff7ff7658) at ./dl-map-segments.h:56 | |
| #2 _dl_map_object_from_fd (name=name@entry=0x5555555548b1 "libc.so.6", fd=3, fbp=fbp@entry=0x7fffffffcf18, realname=0x7ffff7ff7640 "/lib64/libc.so.6", loader=loader@entry=0x7ffff7ffe148, l_type=l_type@entry=1, mode=0, stack_endp=0x7fffffffcf10, nsid=0) at dl-load.c:1231 | |
| #3 0x00007ffff7de43e5 in _dl_map_object (loader=0x7ffff7ffe148, name=0x5555555548b1 "libc.so.6", type=1, trace_mode=0, mode=0, nsid=<optimized out>) at dl-load.c:2200 | |
| #4 0x00007ffff7de8e42 in openaux (a=a@entry=0x7fffffffd4d8) at dl-deps.c:63 | |
| #5 0x00007ffff7deb604 in _dl_catch_error (objname=objname@entry=0x7fffffffd4d0, errstring=errstring@entry=0x7fffffffd4c8, mallocedp=mallocedp@entry=0x7fffffffd4c7, operate=operate@entry=0x7ffff7de8e10 <openaux>, args=args@entry=0x7fffffffd4d8) at dl-error.c:187 | |
| #6 0x00007ffff7de9473 in _dl_map_object_deps (map=map@entry=0x7ffff7ffe148, preloads=<optimized out>, npreloads=npreloads@entry=0, trace_mode=trace_mode@entry=0, open_mode=open_mode@entry=0) at dl-deps.c:254 | |
| #7 0x00007ffff7ddf0d8 in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:1604 | |
| #8 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #9 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #10 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #11 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #12 0x0000000000000001 in ?? () | |
| #13 0x00007fffffffdb0e in ?? () | |
| #14 0x0000000000000000 in ?? () | |
| == Holes in segments | |
| _dl_map_segments() | |
| if (has_holes) { | |
| ... | |
| } | |
| Catchpoint 1 (call to syscall mprotect), 0x00007ffff7df5527 in mprotect () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall mprotect), 0x00007ffff7df5527 in mprotect () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -1,6 +1,8 @@ | |
| 555555554000-55555555a000 r-xp 00000000 08:03 198934 /usr/bin/true | |
| 555555759000-55555575b000 rw-p 00005000 08:03 198934 /usr/bin/true | |
| -7ffff7a1b000-7ffff7ddc000 r-xp 00000000 08:03 526973 /usr/lib64/libc-2.22.so | |
| +7ffff7a1b000-7ffff7bd2000 r-xp 00000000 08:03 526973 /usr/lib64/libc-2.22.so | |
| +7ffff7bd2000-7ffff7dd2000 ---p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| +7ffff7dd2000-7ffff7ddc000 r-xp 003b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7ddc000-7ffff7dfd000 r-xp 00000000 08:03 529029 /usr/lib64/ld-2.22.so | |
| 7ffff7fb3000-7ffff7ff7000 r--p 00000000 08:03 154196 /etc/ld.so.cache | |
| 7ffff7ff7000-7ffff7ff8000 rw-p 00000000 00:00 0 | |
| #0 0x00007ffff7df5527 in mprotect () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7de29a1 in _dl_map_segments (loader=0x7fffffffce90, has_holes=<optimized out>, maplength=3934784, nloadcmds=2, loadcmds=0x7fffffffcb60, type=<optimized out>, header=0x7fffffffcf20, fd=3, l=0x7ffff7ff7658) at ./dl-map-segments.h:72 | |
| #2 _dl_map_object_from_fd (name=name@entry=0x5555555548b1 "libc.so.6", fd=3, fbp=fbp@entry=0x7fffffffcf18, realname=0x7ffff7ff7640 "/lib64/libc.so.6", loader=loader@entry=0x7ffff7ffe148, l_type=l_type@entry=1, mode=0, stack_endp=0x7fffffffcf10, nsid=0) at dl-load.c:1231 | |
| #3 0x00007ffff7de43e5 in _dl_map_object (loader=0x7ffff7ffe148, name=0x5555555548b1 "libc.so.6", type=1, trace_mode=0, mode=0, nsid=<optimized out>) at dl-load.c:2200 | |
| #4 0x00007ffff7de8e42 in openaux (a=a@entry=0x7fffffffd4d8) at dl-deps.c:63 | |
| #5 0x00007ffff7deb604 in _dl_catch_error (objname=objname@entry=0x7fffffffd4d0, errstring=errstring@entry=0x7fffffffd4c8, mallocedp=mallocedp@entry=0x7fffffffd4c7, operate=operate@entry=0x7ffff7de8e10 <openaux>, args=args@entry=0x7fffffffd4d8) at dl-error.c:187 | |
| #6 0x00007ffff7de9473 in _dl_map_object_deps (map=map@entry=0x7ffff7ffe148, preloads=<optimized out>, npreloads=npreloads@entry=0, trace_mode=trace_mode@entry=0, open_mode=open_mode@entry=0) at dl-deps.c:254 | |
| #7 0x00007ffff7ddf0d8 in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:1604 | |
| #8 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #9 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #10 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #11 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #12 0x0000000000000001 in ?? () | |
| #13 0x00007fffffffdb0e in ?? () | |
| #14 0x0000000000000000 in ?? () | |
| == Process load commands | |
| _dl_map_segments() | |
| while (c < &loadcmds[nloadcmds]) { | |
| ... | |
| ++c; | |
| } | |
| Catchpoint 1 (call to syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -2,7 +2,8 @@ | |
| 555555759000-55555575b000 rw-p 00005000 08:03 198934 /usr/bin/true | |
| 7ffff7a1b000-7ffff7bd2000 r-xp 00000000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7bd2000-7ffff7dd2000 ---p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| -7ffff7dd2000-7ffff7ddc000 r-xp 003b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| +7ffff7dd2000-7ffff7dd8000 rw-p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| +7ffff7dd8000-7ffff7ddc000 r-xp 003bd000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7ddc000-7ffff7dfd000 r-xp 00000000 08:03 529029 /usr/lib64/ld-2.22.so | |
| 7ffff7fb3000-7ffff7ff7000 r--p 00000000 08:03 154196 /etc/ld.so.cache | |
| 7ffff7ff7000-7ffff7ff8000 rw-p 00000000 00:00 0 | |
| #0 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7de28f6 in _dl_map_segments (loader=0x7fffffffce90, has_holes=<optimized out>, maplength=<optimized out>, nloadcmds=2, loadcmds=<optimized out>, type=<optimized out>, header=<optimized out>, fd=<optimized out>, l=0x7ffff7ff7658) at ./dl-map-segments.h:90 | |
| #2 _dl_map_object_from_fd (name=name@entry=0x5555555548b1 "libc.so.6", fd=<optimized out>, fbp=fbp@entry=0x7fffffffcf18, realname=<optimized out>, loader=loader@entry=0x7ffff7ffe148, l_type=l_type@entry=1, mode=0, stack_endp=0x7fffffffcf10, nsid=0) at dl-load.c:1231 | |
| #3 0x00007ffff7de43e5 in _dl_map_object (loader=0x7ffff7ffe148, name=0x5555555548b1 "libc.so.6", type=1, trace_mode=0, mode=0, nsid=<optimized out>) at dl-load.c:2200 | |
| #4 0x00007ffff7de8e42 in openaux (a=a@entry=0x7fffffffd4d8) at dl-deps.c:63 | |
| #5 0x00007ffff7deb604 in _dl_catch_error (objname=objname@entry=0x7fffffffd4d0, errstring=errstring@entry=0x7fffffffd4c8, mallocedp=mallocedp@entry=0x7fffffffd4c7, operate=operate@entry=0x7ffff7de8e10 <openaux>, args=args@entry=0x7fffffffd4d8) at dl-error.c:187 | |
| #6 0x00007ffff7de9473 in _dl_map_object_deps (map=map@entry=0x7ffff7ffe148, preloads=<optimized out>, npreloads=npreloads@entry=0, trace_mode=trace_mode@entry=0, open_mode=open_mode@entry=0) at dl-deps.c:254 | |
| #7 0x00007ffff7ddf0d8 in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:1604 | |
| #8 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #9 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #10 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #11 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #12 0x0000000000000001 in ?? () | |
| #13 0x00007fffffffdb0e in ?? () | |
| #14 0x0000000000000000 in ?? () | |
| == Zero end of segment | |
| Catchpoint 1 (call to syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -3,7 +3,7 @@ | |
| 7ffff7a1b000-7ffff7bd2000 r-xp 00000000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7bd2000-7ffff7dd2000 ---p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7dd2000-7ffff7dd8000 rw-p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| -7ffff7dd8000-7ffff7ddc000 r-xp 003bd000 08:03 526973 /usr/lib64/libc-2.22.so | |
| +7ffff7dd8000-7ffff7ddc000 rw-p 00000000 00:00 0 | |
| 7ffff7ddc000-7ffff7dfd000 r-xp 00000000 08:03 529029 /usr/lib64/ld-2.22.so | |
| 7ffff7fb3000-7ffff7ff7000 r--p 00000000 08:03 154196 /etc/ld.so.cache | |
| 7ffff7ff7000-7ffff7ff8000 rw-p 00000000 00:00 0 | |
| #0 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7de292e in _dl_map_segments (loader=0x7fffffffce90, has_holes=<optimized out>, maplength=<optimized out>, nloadcmds=2, loadcmds=<optimized out>, type=<optimized out>, header=<optimized out>, fd=<optimized out>, l=0x7ffff7ff7658) at ./dl-map-segments.h:137 | |
| #2 _dl_map_object_from_fd (name=name@entry=0x5555555548b1 "libc.so.6", fd=<optimized out>, fbp=fbp@entry=0x7fffffffcf18, realname=<optimized out>, loader=loader@entry=0x7ffff7ffe148, l_type=l_type@entry=1, mode=0, stack_endp=0x7fffffffcf10, nsid=0) at dl-load.c:1231 | |
| #3 0x00007ffff7de43e5 in _dl_map_object (loader=0x7ffff7ffe148, name=0x5555555548b1 "libc.so.6", type=1, trace_mode=0, mode=0, nsid=<optimized out>) at dl-load.c:2200 | |
| #4 0x00007ffff7de8e42 in openaux (a=a@entry=0x7fffffffd4d8) at dl-deps.c:63 | |
| #5 0x00007ffff7deb604 in _dl_catch_error (objname=objname@entry=0x7fffffffd4d0, errstring=errstring@entry=0x7fffffffd4c8, mallocedp=mallocedp@entry=0x7fffffffd4c7, operate=operate@entry=0x7ffff7de8e10 <openaux>, args=args@entry=0x7fffffffd4d8) at dl-error.c:187 | |
| #6 0x00007ffff7de9473 in _dl_map_object_deps (map=map@entry=0x7ffff7ffe148, preloads=<optimized out>, npreloads=npreloads@entry=0, trace_mode=trace_mode@entry=0, open_mode=open_mode@entry=0) at dl-deps.c:254 | |
| #7 0x00007ffff7ddf0d8 in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:1604 | |
| #8 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #9 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #10 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #11 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #12 0x0000000000000001 in ?? () | |
| #13 0x00007fffffffdb0e in ?? () | |
| #14 0x0000000000000000 in ?? () | |
| == Allocate DTV slot info list (Dynamic Thread Vector) | |
| See https://www.akkadia.org/drepper/tls.pdf for a description of the data structure | |
| Catchpoint 1 (call to syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -5,6 +5,7 @@ | |
| 7ffff7dd2000-7ffff7dd8000 rw-p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7dd8000-7ffff7ddc000 rw-p 00000000 00:00 0 | |
| 7ffff7ddc000-7ffff7dfd000 r-xp 00000000 08:03 529029 /usr/lib64/ld-2.22.so | |
| +7ffff7fb2000-7ffff7fb3000 rw-p 00000000 00:00 0 | |
| 7ffff7fb3000-7ffff7ff7000 r--p 00000000 08:03 154196 /etc/ld.so.cache | |
| 7ffff7ff7000-7ffff7ff8000 rw-p 00000000 00:00 0 | |
| 7ffff7ff8000-7ffff7ffa000 r--p 00000000 00:00 0 [vvar] | |
| #0 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7df412e in __libc_memalign (align=align@entry=8, n=1040) at dl-minimal.c:78 | |
| #2 0x00007ffff7df41bd in malloc (n=<optimized out>) at dl-minimal.c:95 | |
| #3 0x00007ffff7df41ee in calloc (nmemb=nmemb@entry=1040, size=size@entry=1) at dl-minimal.c:114 | |
| #4 0x00007ffff7ddcb8f in init_tls () at rtld.c:587 | |
| #5 0x00007ffff7ddf60f in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:1679 | |
| #6 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #7 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #8 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #9 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #10 0x0000000000000001 in ?? () | |
| #11 0x00007fffffffdb0e in ?? () | |
| #12 0x0000000000000000 in ?? () | |
| == Construct static TLS block and the dtv for the initial thread | |
| _dl_allocate_tls_storage() | |
| Catchpoint 1 (call to syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -5,7 +5,7 @@ | |
| 7ffff7dd2000-7ffff7dd8000 rw-p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7dd8000-7ffff7ddc000 rw-p 00000000 00:00 0 | |
| 7ffff7ddc000-7ffff7dfd000 r-xp 00000000 08:03 529029 /usr/lib64/ld-2.22.so | |
| -7ffff7fb2000-7ffff7fb3000 rw-p 00000000 00:00 0 | |
| +7ffff7fb1000-7ffff7fb3000 rw-p 00000000 00:00 0 | |
| 7ffff7fb3000-7ffff7ff7000 r--p 00000000 08:03 154196 /etc/ld.so.cache | |
| 7ffff7ff7000-7ffff7ff8000 rw-p 00000000 00:00 0 | |
| 7ffff7ff8000-7ffff7ffa000 r--p 00000000 00:00 0 [vvar] | |
| #0 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7df412e in __libc_memalign (align=<optimized out>, n=n@entry=4096) at dl-minimal.c:78 | |
| #2 0x00007ffff7dee0aa in _dl_allocate_tls_storage () at dl-tls.c:367 | |
| #3 0x00007ffff7ddcbdb in init_tls () at rtld.c:620 | |
| #4 0x00007ffff7ddf60f in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:1679 | |
| #5 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #6 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #7 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #8 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #9 0x0000000000000001 in ?? () | |
| #10 0x00007fffffffdb0e in ?? () | |
| #11 0x0000000000000000 in ?? () | |
| == Allocate DTV (Dynamic Thread Vector) | |
| Catchpoint 1 (call to syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall mmap), 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -5,7 +5,7 @@ | |
| 7ffff7dd2000-7ffff7dd8000 rw-p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7dd8000-7ffff7ddc000 rw-p 00000000 00:00 0 | |
| 7ffff7ddc000-7ffff7dfd000 r-xp 00000000 08:03 529029 /usr/lib64/ld-2.22.so | |
| -7ffff7fb1000-7ffff7fb3000 rw-p 00000000 00:00 0 | |
| +7ffff7fb0000-7ffff7fb3000 rw-p 00000000 00:00 0 | |
| 7ffff7fb3000-7ffff7ff7000 r--p 00000000 08:03 154196 /etc/ld.so.cache | |
| 7ffff7ff7000-7ffff7ff8000 rw-p 00000000 00:00 0 | |
| 7ffff7ff8000-7ffff7ffa000 r--p 00000000 00:00 0 [vvar] | |
| #0 0x00007ffff7df54da in mmap64 () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7df412e in __libc_memalign (align=align@entry=8, n=272) at dl-minimal.c:78 | |
| #2 0x00007ffff7df41bd in malloc (n=<optimized out>) at dl-minimal.c:95 | |
| #3 0x00007ffff7df41ee in calloc (nmemb=nmemb@entry=17, size=size@entry=16) at dl-minimal.c:114 | |
| #4 0x00007ffff7dee101 in allocate_dtv (result=0x7ffff7fb1700) at dl-tls.c:322 | |
| #5 _dl_allocate_tls_storage () at dl-tls.c:390 | |
| #6 0x00007ffff7ddcbdb in init_tls () at rtld.c:620 | |
| #7 0x00007ffff7ddf60f in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:1679 | |
| #8 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #9 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #10 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #11 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #12 0x0000000000000001 in ?? () | |
| #13 0x00007fffffffdb0e in ?? () | |
| #14 0x0000000000000000 in ?? () | |
| == Change protection to Read-Only after relocation processing (libc.so) | |
| _dl_protect_relro() | |
| _dl_relocate_object() | |
| Catchpoint 1 (call to syscall mprotect), 0x00007ffff7df5527 in mprotect () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall mprotect), 0x00007ffff7df5527 in mprotect () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -2,7 +2,8 @@ | |
| 555555759000-55555575b000 rw-p 00005000 08:03 198934 /usr/bin/true | |
| 7ffff7a1b000-7ffff7bd2000 r-xp 00000000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7bd2000-7ffff7dd2000 ---p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| -7ffff7dd2000-7ffff7dd8000 rw-p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| +7ffff7dd2000-7ffff7dd6000 r--p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| +7ffff7dd6000-7ffff7dd8000 rw-p 001bb000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7dd8000-7ffff7ddc000 rw-p 00000000 00:00 0 | |
| 7ffff7ddc000-7ffff7dfd000 r-xp 00000000 08:03 529029 /usr/lib64/ld-2.22.so | |
| 7ffff7fb0000-7ffff7fb3000 rw-p 00000000 00:00 0 | |
| #0 0x00007ffff7df5527 in mprotect () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7de80f8 in _dl_protect_relro (l=0x7ffff7ff7658) at dl-reloc.c:321 | |
| #2 _dl_relocate_object (scope=<optimized out>, reloc_mode=<optimized out>, consider_profiling=<optimized out>, consider_profiling@entry=0) at dl-reloc.c:306 | |
| #3 0x00007ffff7ddfa33 in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:2066 | |
| #4 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #5 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #6 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #7 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #8 0x0000000000000001 in ?? () | |
| #9 0x00007fffffffdb0e in ?? () | |
| #10 0x0000000000000000 in ?? () | |
| == Change protection to Read-Only after relocation processing (/bin/true) | |
| _dl_protect_relro() | |
| _dl_relocate_object() | |
| Catchpoint 1 (call to syscall mprotect), 0x00007ffff7df5527 in mprotect () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall mprotect), 0x00007ffff7df5527 in mprotect () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -1,5 +1,6 @@ | |
| 555555554000-55555555a000 r-xp 00000000 08:03 198934 /usr/bin/true | |
| -555555759000-55555575b000 rw-p 00005000 08:03 198934 /usr/bin/true | |
| +555555759000-55555575a000 r--p 00005000 08:03 198934 /usr/bin/true | |
| +55555575a000-55555575b000 rw-p 00006000 08:03 198934 /usr/bin/true | |
| 7ffff7a1b000-7ffff7bd2000 r-xp 00000000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7bd2000-7ffff7dd2000 ---p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| 7ffff7dd2000-7ffff7dd6000 r--p 001b7000 08:03 526973 /usr/lib64/libc-2.22.so | |
| #0 0x00007ffff7df5527 in mprotect () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7de80f8 in _dl_protect_relro (l=0x7ffff7ffe148) at dl-reloc.c:321 | |
| #2 _dl_relocate_object (scope=<optimized out>, reloc_mode=<optimized out>, consider_profiling=<optimized out>, consider_profiling@entry=0) at dl-reloc.c:306 | |
| #3 0x00007ffff7ddfa33 in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:2066 | |
| #4 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #5 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #6 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #7 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #8 0x0000000000000001 in ?? () | |
| #9 0x00007fffffffdb0e in ?? () | |
| #10 0x0000000000000000 in ?? () | |
| Catchpoint 1 (call to syscall mprotect), 0x00007ffff7df5527 in mprotect () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall mprotect), 0x00007ffff7df5527 in mprotect () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -12,7 +12,8 @@ | |
| 7ffff7ff7000-7ffff7ff8000 rw-p 00000000 00:00 0 | |
| 7ffff7ff8000-7ffff7ffa000 r--p 00000000 00:00 0 [vvar] | |
| 7ffff7ffa000-7ffff7ffc000 r-xp 00000000 00:00 0 [vdso] | |
| -7ffff7ffc000-7ffff7ffe000 rw-p 00020000 08:03 529029 /usr/lib64/ld-2.22.so | |
| +7ffff7ffc000-7ffff7ffd000 r--p 00020000 08:03 529029 /usr/lib64/ld-2.22.so | |
| +7ffff7ffd000-7ffff7ffe000 rw-p 00021000 08:03 529029 /usr/lib64/ld-2.22.so | |
| 7ffff7ffe000-7ffff7fff000 rw-p 00000000 00:00 0 | |
| 7ffffffdd000-7ffffffff000 rw-p 00000000 00:00 0 [stack] | |
| ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall] | |
| #0 0x00007ffff7df5527 in mprotect () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7de80f8 in _dl_protect_relro (l=0x7ffff7ffd998 <_rtld_local+2456>) at dl-reloc.c:321 | |
| #2 _dl_relocate_object (scope=<optimized out>, reloc_mode=reloc_mode@entry=0, consider_profiling=<optimized out>, consider_profiling@entry=0) at dl-reloc.c:306 | |
| #3 0x00007ffff7ddf8c1 in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:2125 | |
| #4 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #5 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #6 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #7 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #8 0x0000000000000001 in ?? () | |
| #9 0x00007fffffffdb0e in ?? () | |
| #10 0x0000000000000000 in ?? () | |
| Catchpoint 1 (call to syscall munmap), 0x00007ffff7df5507 in munmap () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| Catchpoint 1 (returned from syscall munmap), 0x00007ffff7df5507 in munmap () at ../sysdeps/unix/syscall-template.S:84 | |
| 84 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS) | |
| --- | |
| +++ | |
| @@ -8,7 +8,6 @@ | |
| 7ffff7dd8000-7ffff7ddc000 rw-p 00000000 00:00 0 | |
| 7ffff7ddc000-7ffff7dfd000 r-xp 00000000 08:03 529029 /usr/lib64/ld-2.22.so | |
| 7ffff7fb0000-7ffff7fb3000 rw-p 00000000 00:00 0 | |
| -7ffff7fb3000-7ffff7ff7000 r--p 00000000 08:03 154196 /etc/ld.so.cache | |
| 7ffff7ff7000-7ffff7ff8000 rw-p 00000000 00:00 0 | |
| 7ffff7ff8000-7ffff7ffa000 r--p 00000000 00:00 0 [vvar] | |
| 7ffff7ffa000-7ffff7ffc000 r-xp 00000000 00:00 0 [vdso] | |
| #0 0x00007ffff7df5507 in munmap () at ../sysdeps/unix/syscall-template.S:84 | |
| #1 0x00007ffff7df31d8 in _dl_unload_cache () at dl-cache.c:318 | |
| #2 0x00007ffff7ddf90e in dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:2167 | |
| #3 0x00007ffff7df3c00 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffffd720, dl_main=dl_main@entry=0x7ffff7ddd990 <dl_main>) at ../elf/dl-sysdep.c:249 | |
| #4 0x00007ffff7de0bd1 in _dl_start_final (arg=0x7fffffffd720) at rtld.c:305 | |
| #5 _dl_start (arg=0x7fffffffd720) at rtld.c:411 | |
| #6 0x00007ffff7ddcc88 in _start () from /lib64/ld-linux-x86-64.so.2 | |
| #7 0x0000000000000001 in ?? () | |
| #8 0x00007fffffffdb0e in ?? () | |
| #9 0x0000000000000000 in ?? () | |
| main() called | |
| [Inferior 1 (process 793) exited normally] |
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| import gdb | |
| import pprint | |
| import difflib | |
| class CatchSyscallState: | |
| def __init__(self): | |
| self.stop_count = 0 | |
| self.do_continue = False # execute 'continue' in main loop | |
| self.maps_on_last_entry = None | |
| def stop_handler(self, event): | |
| if isinstance(event, gdb.BreakpointEvent): | |
| return | |
| # every syscall stops once on entry, once on return | |
| if self.stop_count % 2 == 0: | |
| self.syscall_entry_handler(event) | |
| else: | |
| self.syscall_exit_handler(event) | |
| self.stop_count += 1 | |
| self.do_continue = True | |
| def syscall_entry_handler(self, event): | |
| pid = event.inferior_thread.ptid[0] | |
| self.maps_on_last_entry = open('/proc/%d/maps' % (pid,)).read() | |
| def syscall_exit_handler(self, event): | |
| pid = event.inferior_thread.ptid[0] | |
| t = open('/proc/%d/maps' % (pid,)).read() | |
| prev = self.maps_on_last_entry.split('\n') | |
| current = t.split('\n') | |
| for l in difflib.unified_diff(prev, current, lineterm=''): | |
| print(l) | |
| gdb.execute('backtrace') | |
| def exec_continue(self): | |
| if not self.do_continue: | |
| return | |
| self.do_continue = False | |
| gdb.execute('continue') | |
| class MainBreakpoint(gdb.Breakpoint): | |
| def stop(self): | |
| gdb.write('\n\n\nmain() called\n\n\n') | |
| return False | |
| gdb.execute('set non-stop 1') | |
| gdb.execute('file /bin/true') | |
| gdb.execute('catch syscall mmap mprotect munmap') | |
| # gdb.execute('commands 1\nsilent\nend\n') | |
| s = CatchSyscallState() | |
| gdb.events.stop.connect(s.stop_handler) | |
| b = MainBreakpoint('main') | |
| gdb.execute('run') | |
| while s.do_continue: | |
| s.exec_continue() | |
| gdb.execute('quit') |
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