Dmitry V. Levin [Thu, 27 Aug 2015 19:51:05 +0000 (19:51 +0000)]
mpers.m4: workaround missing gnu/stubs-*.h files
On some systems missing gnu/stubs-*.h files make -m32/-mx32 compilation
checks fail. As we want to support multiple personalities despite of
this limitation, workaround the check by creating empty gnu stub files
if necessary.
* m4/mpers.m4 (st_MPERS): Check for the gnu stub file. Create an empty
gnu stub file if the system one is missing.
* Makefile.am (DISTCLEANFILES): Add gnu/stubs-32.h and gnu/stubs-x32.h.
Elvira Khabirova [Mon, 17 Aug 2015 23:01:26 +0000 (02:01 +0300)]
Enhance msgctl syscall decoding
Make parser of msgctl syscall print struct msqid_ds.
* ipc_msgctl.c (msqid_ds_t): New typedef. Mpersify it.
(print_msqid_ds): New function. Use msqid_ds_t.
(sys_msgctl): Use print_msqid_ds.
* tests/ipc_msg.c: Update for struct msqid_ds support.
Make parser of shmctl syscall print struct shmid_ds.
* ipc_shmctl.c (shmid_ds_t): New typedef. Mpersify it.
(print_shmid_ds): New function. Use shmid_ds_t.
(sys_shmctl): Use print_shmid_ds.
* tests/ipc_shm.c: Update for struct shmid_ds support.
Elvira Khabirova [Wed, 19 Aug 2015 02:33:34 +0000 (05:33 +0300)]
Mpersify tprint_msgsnd and tprint_msgrcv
Fix multiple personalities support in tprint_msgsnd and tprint_msgrcv
by converting tprint_msgbuf into a mpersified printer.
* print_msgbuf.c (msgbuf_t): New typedef. Mpersify it.
(tprint_msgbuf): Use it instead of long.
Wrap function name into MPERS_PRINTER_DECL.
* ipc_msg.c (tprint_msgsnd, tprint_msgrcv): Use mpersified
tprint_msgbuf.
Elvira Khabirova [Thu, 20 Aug 2015 18:15:41 +0000 (21:15 +0300)]
Mpersify parsers of mq_open and mq_getsetattr syscalls
Fix multiple personalities support in parsers of mq_open and
mq_getsetattr by converting printmqattr into a mpersified printer.
* print_mq_attr.c (mq_attr_t): New typedef. Mpersify it.
(printmqattr): Use it instead of struct mq_attr. Wrap function name
into MPERS_PRINTER_DECL.
* mq.c (mq_open, mq_getsetattr): Use mpersified printmqattr.
Mpersify parsers of getrusage, waitpid, wait4, and waitid syscalls
Fix multiple personalities support in parsers of getrusage, waitpid,
wait4, and waitid syscalls by converting printrusage into a mpersified
printer.
* defs.h (printrusage): Remove.
* printrusage.c (rusage_t): New typedef. Mpersify it.
(printrusage): Use it instead of struct rusage.
Wrap function name into MPERS_PRINTER_DECL.
* resource.c (sys_getrusage): Use mpersified printrusage.
* wait.c (printwaitn, sys_waitid): Likewise.
Fix multiple personalities support in parsers of ptrace,
rt_sigqueueinfo, rt_tgsigqueueinfo, rt_sigtimedwait and waitid syscalls
by converting printsiginfo_at into a mpersified printer.
* printsiginfo.c (siginfo_t): Mpersify.
(printsiginfo_at): Wrap function name into MPERS_PRINTER_DECL.
* defs.h (printsiginfo_at): Remove.
* signal.c (print_sigqueueinfo, sys_rt_sigtimedwait): Use mpersified
printsiginfo_at.
* process.c (sys_ptrace): Likewise.
* wait.c (sys_waitid): Likewise.
Dmitry V. Levin [Mon, 3 Aug 2015 22:52:40 +0000 (01:52 +0300)]
Mpersify parsers of utimes, futimesat, and utimensat syscalls
Fix multiple personalities support in parsers of utimes, futimesat,
and utimensat syscalls by introducing two mpersified printers:
print_timeval_pair and print_timespec_utime_pair.
* print_time.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* utimes.c (decode_utimes): Remove.
(sys_utimes, sys_futimesat): Use print_timeval_pair instead
of decode_utimes.
(sys_utimensat): Use print_timespec_utime_pair instead of decode_utimes.
Add a subsystem for semi-automatical definition of how parsers should
work with personality-dependent (mpers) types of tracee's data. Create
auxiliary libraries containing mpers syscall parsers and printer
functions, one library for each possible nonnative target personality.
Currently some parsers do not handle differences in definitions of data
types between personalities, namely LP64 and ILP32. When
this is the case, long integers, pointers, and all compound
types containing long and pointer members may be printed incorrectly,
because of differences in sizes, offsets and alignments.
Since in most cases these are the only differences in desired behaviour
of parsers and printers for different personalities, a correct way
would be to compile one source code into multiple parsers, differing
only in definitions of mpers types.
To get a definition of a given type for nonnative personality
a very basic .c file containing a declaration of a variable of this type
is being compiled for this personality (using -m32 or -mx32 compiler
flag). Information about the type is then being extracted from
this binary's DWARF debug info with an awk script and put
into a corresponding header file. Resulting headers are being used to
compile mpers variations of syscall parsers and printer functions.
In addition to syscall parsers, there can occur a need to create mpers
printing functions, which then can be called from many places
in the code (for example, printsiginfo_at). Such functions (printers)
are marked in a special manner.
For each possible nonnative target personality a library is being
created, containing mpers variations of syscall parsers and printers.
Only syscall parsers from files marked in a special manner and specially
marked functions from such files are being recompiled and included
in these libraries.
generate_mpers_am.sh is called by bootstrap to find the files
from strace_SOURCES which include MPERS_DEFS. During compilation,
these files are being inspected for inclusions of DEF_MPERS_TYPE,
and nonnative variations of each included type are being generated
by an awk script.
Mpers parser names are being modified during inclusions of syscallent
headers for nonnative personalities. Pointers to printers are
being stored in structs struct_printers, and a master
pointer printers is being updated on every set_personality.
* README-mpers: New README explaining how to use mpers support.
* empty.h: New empty file.
* generate_mpers_am.sh: New file.
* mpers.awk: Likewise.
* mpers.sh: Likewise.
* mpers_test.sh: Likewise.
* mpers_type.h: Likewise.
* Makefile.am (strace_SOURCES): Add empty.h and mpers_type.h.
(strace_CPPFLAGS, strace_LDFLAGS, strace_LDADD): Move to the beginning
of the file.
(strace_LDADD, noinst_LIBRARIES): Add libmpers-%.a.
(EXTRA_DIST): Add mpers.awk, mpers.sh, mpers_test.sh.
(BUILT_SOURCES, CLEANFILES): Add new generated files:
native_printer_decls.h, native_printer_defs.h, printers.h,
[HAVE_M32_MPERS] $(mpers_m32_targets), and [HAVE_MX32_MPERS]
$(mpers_mx32_targets).
(mpers_NAME, mpers_PREFIX, mpers_DEFS, mpers_INCLUDES, mpers_CPPFLAGS,
mpers_sh_opts, libmpers_CPPFLAGS, libmpers_m[x]32_a_SOURCES,
libmpers_m[x]32_a_CPPFLAGS, mpers_m[x]32_targets): New variables.
(mpers-m[x]32.stamp, m[x]32_defs.h, m[x]32_funcs.h, printers.h,
%_printer_decls.h, %_printer_defs.h, clean-local,
native_printer_decls.h, native_printer_defs.h, $mpers_m[x]32_targets):
New targets.
* bootstrap: Add generate_mpers_am.sh.
* configure.ac: Add AC_PROG_RANLIB.
* m4/mpers.m4: Add HAVE_MPERS variable. Add $st_cv_mpers checks.
* defs.h: Include mpers_type.h.
Include printers.h, native_printer_decls.h, define MPERS_PRINTER_NAME.
Redefine SYS_FUNC_NAME. Define MPERS_PRINTER_DECL.
[HAVE_M32_MPERS]: define PERSONALITY1_INCLUDE_FUNCS,
PERSONALITY1_INCLUDE_PRINTERS_DECLS, PERSONALITY1_INCLUDE_PRINTERS_DEFS
for X86_64, X32.
[HAVE_MX32_MPERS]: define PERSONALITY2_INCLUDE_FUNCS,
PERSONALITY2_INCLUDE_PRINTERS_DECLS, PERSONALITY2_INCLUDE_PRINTERS_DEFS
for X86_64.
Add fallback definitions of
PERSONALITY1_INCLUDE_FUNCS, PERSONALITY2_INCLUDE_FUNCS,
PERSONALITY0_INCLUDE_PRINTERS_DECLS, PERSONALITY0_INCLUDE_PRINTERS_DEFS,
PERSONALITY1_INCLUDE_PRINTERS_DECLS, PERSONALITY1_INCLUDE_PRINTERS_DEFS,
PERSONALITY2_INCLUDE_PRINTERS_DECLS, PERSONALITY2_INCLUDE_PRINTERS_DEFS.
* syscall.c: Include PERSONALITY1_INCLUDE_FUNCS,
PERSONALITY2_INCLUDE_FUNCS,
PERSONALITY0_INCLUDE_PRINTERS_DECLS, PERSONALITY0_INCLUDE_PRINTERS_DEFS,
PERSONALITY1_INCLUDE_PRINTERS_DECLS, PERSONALITY1_INCLUDE_PRINTERS_DEFS,
PERSONALITY2_INCLUDE_PRINTERS_DECLS, PERSONALITY2_INCLUDE_PRINTERS_DEFS.
(printers): New struct. Update it when needed.
* .gitignore: Add libmpers-m32.a, libmpers-mx32.a, m32_defs.h,
m32_funcs.h, m32_printer_decls.h, m32_printer_defs.h, mpers-m32,
mpers-m32.stamp, mpers-mx32, mpers-mx32.stamp, mpers.am, mx32_defs.h,
mx32_funcs.h, mx32_printer_decls.h, mx32_printer_defs.h,
native_printer_decls.h, native_printer_defs.h, and printers.h.
Mike Frysinger [Wed, 19 Aug 2015 17:29:27 +0000 (13:29 -0400)]
decode extend getsockopt/setsockopt options
Currently the code assumes the set of valid options between getsockopt
and setsockopt are exactly the same and thus maintains one list. The
kernel unfortunately does not do this -- it allows for different opts
between the get and set functions. See the {g,s}et_opt{min,max} fields
in the various netfilter subcores.
To support this, extend the printxval function to take multiple sets of
xlats as varargs. Then we add the new get/set lists, and pass them down
in the net code when decoding things.
If these were setsockopt calls, then 0x40 & 0x41 would be
IPT_SO_SET_REPLACE & IPT_SO_SET_ADD_COUNTERS.
* configure.ac: Check for netfilter headers.
* defs.h (printxvals): New prototype.
(printxval): Change to a define.
* net.c: Include netfilter headers and new sockopts headers.
(print_sockopt_fd_level_name): Add a is_getsockopt argument. Change SOL_IP
and SOL_IPV6 decoding to use printxvals, and use is_getsockopt to pass more
xlats down.
(getsockopt): Call print_sockopt_fd_level_name with is_getsockopt as true.
(setsockopt): Call print_sockopt_fd_level_name with is_getsockopt as false.
* util.c (printxval): Rename to ...
(printxvals): ... this. Rewrite to be varargs based.
* xlat/getsockipoptions.in: New xlat list.
* xlat/getsockipv6options.in, xlat/setsockipoptions.in,
xlat/setsockipv6options.in: Likewise.
Elvira Khabirova [Wed, 19 Aug 2015 03:06:29 +0000 (06:06 +0300)]
ipc_msg.c: fix multiple personalities support in msgrcv ipc subcall
When msgrcv syscall is an ipc subcall, msgp (pointer to struct msgbuf)
and msgtyp (message type) syscall arguments are passed via proxy
structure which definition significantly depends on tracee's
wordsize.
* ipc_msg.c (fetch_msgrcv_args): New function.
(sys_msgrcv): Use it.
Dmitry V. Levin [Wed, 19 Aug 2015 01:25:39 +0000 (01:25 +0000)]
tests: add sendfile.test and sendfile64.test
* tests/sendfile.c: New file.
* tests/sendfile64.c: New file.
* tests/sendfile.test: New test.
* tests/sendfile64.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add sendfile and sendfile64.
(TESTS): Add sendfile.test and sendfile64.test.
* tests/.gitignore: Add sendfile and sendfile64.
Dmitry V. Levin [Tue, 18 Aug 2015 14:58:27 +0000 (14:58 +0000)]
Fix printing tracee's long integers
Replace ambiguous printnum_long that used to fetch native long integers
from tracee's memory with printnum_ptr, printnum_slong, and printnum_ulong
that fetch tracee's pointer, signed long, and unsigned long integers.
* defs.h (printnum_long, printpair_long): Remove prototypes.
(printnum_int64, printpair_int64): Remove macros, declare functions
unconditionally.
[SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4] (printnum_long_int):
New prototype.
(printnum_ptr, printnum_slong, printnum_ulong): New macros.
* aio.c (sys_io_setup): Use printnum_ulong.
* block.c (block_ioctl): Use printnum_slong and printnum_ulong.
* get_robust_list.c (sys_get_robust_list): Use printnum_ptr
and printnum_ulong.
* io.c (print_off_t): Remove.
(sys_sendfile): Use printnum_ulong.
* ipc.c (sys_semctl): Use printnum_ptr.
* prctl.c (sys_prctl): Likewise.
* process.c (sys_ptrace): Likewise.
* rtc.c (rtc_ioctl): Use printnum_ulong.
* util.c (printnum_long, printpair_long): Remove.
(printnum_int64, printpair_int64): Define unconditionally.
[SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4] (printnum_long_int):
New function.
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org> Signed-off-by: Elvira Khabirova <lineprinter0@gmail.com>
When receiving SIGSYS, the si_syscall & si_arch fields are set to known
values, so make sure we decode their values into the symbol settings.
This makes stracing seccomp failures much easier.
* defs.h (syscall_name): New prototype.
* printsiginfo.c: Include linux/audit.h and xlat/audit_arch.h.
(print_si_info): Decode si_syscall & si_arch for SIGSYS.
* syscall.c (undefined_scno_name): Delete.
(syscall_name): New function.
(trace_syscall_entering): Change undefined_scno_name to syscall_name.
(trace_syscall_exiting): Likewise.
* xlat/audit_arch.in: New file.
Dmitry V. Levin [Sun, 2 Aug 2015 01:41:26 +0000 (01:41 +0000)]
socket: mark return code with RVAL_FD flag
* net.c (sys_socket): Set RVAL_FD flag in the return code.
* tests/net-yy-accept.awk: Update socket and bind regexps.
* tests/unix-yy-accept.awk: Likewise.
* tests/net-yy-connect.awk: Update socket and connect regexps.
* tests/unix-yy-connect.awk: Likewise.
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