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* syscall.c (trace_syscall_exiting): Use err_name() instead
of open-coding it. Print unrecognized errno values using %lu format
instead of ERRNO_%lu as the latter prodices an invalid constant.
This is the type actually used for the error code on architectures
that use a dedicated register.
* defs.h (struct tcb): Change the type of u_error to unsigned long.
* syscall.c (trace_syscall_exiting): Change the type of u_error variable
to unsigned long, print it using %lu format, drop no longer needed
explicit cast to unsigned long.
(saved_u_error): Change type to unsigned long.
Enhance abbrev=, raw=, and verbose= to accept the same syntax as trace=.
For example, this allows such syntax as -e verbose=file.
* syscall.c (lookup_class): Define before qual_syscall.
(qualify): Move the loop based on lookup_class ...
(qual_syscall): ... here.
* tests/qual_syscall.test: Check it.
When the syscall number returned by arch_get_scno is a mapped indirect
subcall (i.e. mapped subcall of socketcall or ipc syscall), do not
mistakenly treat it as a valid indirect subcall.
* defs.h (SCNO_IS_VALID): Treat scno with TRACE_INDIRECT_SUBCALL flag
as invalid.
* syscall.c (syscall_name): Do no shuffle scno.
(trace_syscall_entering, trace_syscall_exiting): Use
tcp->s_ent->sys_name instead of syscall_name.
(get_scno): In case of invalid syscall, allocate a dynamic struct sysent
containing an appropriate .sys_name.
* tests/nsyscalls.c (main) [SYS_socket_subcall]: Check decoding
of direct syscall number SYS_socket_subcall+1.
(main) [SYS_ipc_subcall]: Check decoding of direct syscall number
SYS_ipc_subcall+1.
* xlat/ipccalls.in: New file.
* ipc.c: New file.
* Makefile.am (libstrace_a_SOURCES): Add it.
* linux/dummy.h (sys_ipc): Remove stub alias.
* syscall.c (decode_ipc_subcall): Treat 1st argument of ipc syscall
as "unsigned int".
[S390 || S390X]: Skip ipc cubcalls that have non-zero version.
[SPARC64]: Likewise, for the native personality.
Save ipc cubcall version for later use by specific ipc parsers.
* ipc_msg.c (SYS_FUNC(msgrcv)): Handle non-zero ipc subcall version.
[SPARC64]: Handle non-ipc_kludge case for the native personality.
* linux/subcall.h (msgrcv): Change nargs from 4 to 5.
* linux/s390/syscallent.h (ipc): Change nargs from 6 to 5.
* linux/s390x/syscallent.h (ipc): Likewise.
* xlat/socketcalls.in: New file.
* socketcall.c: New file.
* Makefile.am (libstrace_a_SOURCES): Add it.
* linux/dummy.h (sys_socketcall): Remove stub alias.
* syscall.c (decode_socket_subcall): Treat 1st argument of socketcall
as "int". Do not substitute syscall until all socketcall arguments
have been fetched successfully.
We need to be able to store private data in the struct tcb across it's
lifetime. To ensure proper deallocation of this stored data a callback
must be provided along with the data. The callback is executed
automatically on exiting syscall, and when the life of the tcb ends.
* defs.h (struct tcb): Add _priv_data and _free_priv_data fields.
(get_tcb_priv_data, set_tcb_priv_data, free_tcb_priv_data):
New prototypes.
(get_tcb_priv_ulong, set_tcb_priv_ulong): New static inline functions.
* strace.c (get_tcb_priv_data, set_tcb_priv_data, free_tcb_priv_data):
New functions.
(droptcb): Call free_tcb_priv_data.
* syscall.c (trace_syscall_exiting): Call free_tcb_priv_data
when clearing TCB_INSYSCALL flag.
Signed-off-by: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Since UNDEFINED_SCNO is set if and only if !SCNO_IS_VALID
and since tcp->s_ent can only be set to &sysent[tcp->scno]
(or to &unknown, but only when !SCNO_IS_VALID), there is no need
to check for UNDEFINED_SCNO before calling syscall_name(tcp->scno).
* defs.h (UNDEFINED_SCNO): Remove.
* syscall.c (get_scno, trace_syscall_entering, trace_syscall_exiting):
Remove checks for UNDEFINED_SCNO.
* defs.h (dumpiov_upto): New prototype.
(dumpiov): Change to a wrapper around dumpiov_upto.
* util.c (dumpiov): Rename to dumpiov_upto, add and check data_size
argument.
* io.c (SYS_FUNC(readv)): Call tprint_iov_upto instead
of tprint_iov and specify syscall return value as a data size limit.
* syscall.c (dumpio): In case of SEN_readv, call dumpiov_upto instead
of dumpiov and specify syscall return value as a data size limit.
* NEWS: Mention this fix.
* tests/readv.c: New file.
* tests/readv.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add readv.
(TESTS): Add readv.test.
* tests/.gitignore: Add readv.
This change complements commit v4.9-359-gd93d9f8 by fixing
RVAL_UDECIMAL case.
The only syscall that appears to be affected is the times syscall.
* syscall.c (trace_syscall_exiting): In case of RVAL_UDECIMAL,
when current personality is 32-bit, print 32-bit return code.
* NEWS: Mention this fix.
Reported-by: Steve McIntyre <steve@einval.com>
The syscall_name argument was subject to macro expansion because
it was passed down to other macros before it was prefixed.
musl libc defines lfs64 names as macros (e.g. fstat64 as fstat)
so SYS_FUNC(fstat64) was expanded to sys_fstat.
This change adds the prefix before the name is passed to other macros,
i.e. the argument of SYS_FUNC_NAME is already prefixed with sys_.
* defs.h (SYS_FUNC): Add sys_ prefix to SYS_FUNC_NAME's argument.
(SYS_FUNC_NAME): Do not add sys_ prefix to MPERS_FUNC_NAME's argument.
* linux/ia64/syscallent.h (SYS_FUNC_NAME): Do not add sys_ prefix
to MPERS_FUNC_NAME's argument.
* syscall.c (SEN_NAME): Remove.
(SEN): Replace SEN_NAME call with its definition. Add sys_ prefix
to SYS_FUNC_NAME's argument.
Move inclusion of arch specific files that define static functions to
the end of syscall.c.
* syscall.c (get_syscall_result_regs, get_error, getregs_old):
New forward declarations.
(arch_get_scno): Move forward.
Move inclusion of "get_scno.c", "get_syscall_args.c",
"get_syscall_result.c", "get_error.c", and "getregs_old.c"
to the end of file.
Apparently, there are only two types of instruction pointer printers
depending on the architecture: those that print a register that was
fetched earlier, and those that fetch a register themselves using upeek.
With this change, architectures of the first type have ARCH_PC_REG
defined in their arch_regs.c file, architectures of the first type
have ARCH_PC_PEEK_ADDR defined there, and the common code in syscall.c
uses these macros to print the instruction pointer.
* Makefile.am (EXTRA_DIST): Remove linux/*/print_pc.c.
* linux/*/print_pc.c: Remove.
* linux/aarch64/arch_regs.c(ARCH_PC_REG): Define macro.
* linux/arc/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/arm/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/avr32/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/i386/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/ia64/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/metag/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/mips/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/nios2/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/or1k/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/powerpc64/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/powerpc/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/s390/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/s390x/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/sparc64/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/sparc/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/tile/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/x32/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/x86_64/arch_regs.c(ARCH_PC_REG): Likewise.
* linux/alpha/arch_regs.c(ARCH_PC_PEEK_ADDR): Define macro.
* linux/bfin/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/crisv10/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/crisv32/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/hppa/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/m68k/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/microblaze/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/sh64/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/sh/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* linux/xtensa/arch_regs.c(ARCH_PC_PEEK_ADDR): Likewise.
* syscall.c (print_pc): Stop including "print_pc.c".
Use ARCH_PC_REG or ARCH_PC_PEEK_ADDR.
Make get_syscall_result.c files more self-contained. While they are
still being included by syscall.c, the latter no longer provides
a function framework for them.
* linux/alpha/get_syscall_result.c (get_syscall_result_regs): Define.
* linux/bfin/get_syscall_result.c: Likewise.
* linux/crisv10/get_syscall_result.c: Likewise.
* linux/hppa/get_syscall_result.c: Likewise.
* linux/m68k/get_syscall_result.c: Likewise.
* linux/microblaze/get_syscall_result.c: Likewise.
* linux/sh/get_syscall_result.c: Likewise.
* linux/sh64/get_syscall_result.c: Likewise.
* linux/xtensa/get_syscall_result.c: Likewise.
* syscall.c [!ARCH_REGS_FOR_GETREGSET && !ARCH_REGS_FOR_GETREGS]:
Define USE_GET_SYSCALL_RESULT_REGS macro.
[USE_GET_SYSCALL_RESULT_REGS]: Include "get_syscall_result.c".
(get_syscall_result) [USE_GET_SYSCALL_RESULT_REGS]: Stop including
"get_syscall_result.c". Call get_syscall_result_regs.
Requested-by: Denys Vlasenko <dvlasenk@redhat.com>
* kernel_types.h: New file.
* Makefile.am (strace_SOURCES): Add it.
* configure.ac (AC_CHECK_TYPES): Check for __kernel_long_t
and __kernel_ulong_t in <asm/posix_types.h>.
* dirent.c: Stop including <dirent.h>.
(kernel_dirent): Remove.
Include "kernel_types.h".
(print_old_dirent, SYS_FUNC(getdents)): Print variables
of kernel_ulong_t type using %Lu format.
* syscall.c (kernel_long_t, kernel_ulong_t): Remove.
Include "kernel_types.h".
* tests/getdents.c (kernel_dirent): Remove.
Include "kernel_types.h".
(print_dirent): Print variables of kernel_ulong_t type using %Lu format.
Starting with commit v4.6-281-g7af9f35, we implicitly assume that
HAVE_SENDMSG is always defined. Therefore, the check for sendmsg
availability is redundant and could be safely removed.
* configure.ac (AC_CHECK_FUNCS): Remove sendmsg.
* linux/dummy.h [!HAVE_SENDMSG] (sys_recvmsg, sys_sendmsg): Remove
stub aliases.
* net.c [HAVE_SENDMSG]: Define unconditionally.
* syscall.c (dumpio) [HAVE_SENDMSG]: Likewise.
* defs.h (is_erestart): New prototype.
* syscall.c (is_erestart): New function.
* time.c (sys_nanosleep): Use is_erestart,
temporarily_clear_syserror, and restore_cleared_syserror.
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.
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.
* pathtrace.c (pathtrace_match): Change all comparisons with function
pointers to a single SEN based switch.
* syscall.c (dumpio, trace_syscall_entering): Change all comparisons
with function pointers to comparisons with SENs.
* ipc.c (sys_ipc): Remove.
* sock.c (sys_socketcall): Likewise.
* linux/dummy.h (sys_ipc, sys_socketcall): New aliases.
* Makefile.am (BUILT_SOURCES, CLEANFILES): Add sen.h.
(syscallent_names, syscallent_patterns, syscallent_files): New variables.
(sen.h): New rule.
* defs.h (struct sysent): Add sen field.
* generate_sen.sh: New file.
* linux/syscall.h: Include "sen.h".
* syscall.c (SEN_NAME): New temporary macro.
(SEN): Use it to prepend syscall entry number.
