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x32 is the only linux architecture where preadv2 and pwritev2 syscalls
take 5 arguments instead of 6.
* io.c (PREADV2_PWRITEV2_FLAGS_ARG_NO): New macro.
(SYS_FUNC(preadv2), SYS_FUNC(pwritev2)): Use it.
* linux/x32/syscallent.h (preadv2, pwritev2): Change nargs to 5.
* NEWS: Mention this fix.
* tests/preadv2-pwritev2.c (main): Fix invocation of preadv2
and pwritev2 syscalls on x32.
* defs.h (widen_to_ulong): Remove.
(truncate_kulong_to_current_wordsize): New static inline function.
* io.c (do_preadv, do_pwritev): Use it instead of widen_to_ulong.
The demise of HAVE_STRUCT_TCB_EXT_ARG opens the way for a simpler
implementation.
* io.c (print_lld_from_low_high_val): Merge [SIZEOF_LONG > 4
&& SIZEOF_LONG == SIZEOF_LONG_LONG]
and [SIZEOF_KERNEL_LONG_T > SIZEOF_LONG] cases
into a single [SIZEOF_KERNEL_LONG_T > 4] case.
[SIZEOF_KERNEL_LONG_T == 4]: Use direct casts to long long
instead of zero_extend_signed_to_ull.
Remove temporary macros created for transition from long
to kernel_ulong_t.
Automatically replace PRI_kr[dux] with PRI_kl[dux] using
$ git grep -l 'PRI_kr[dux]' | xargs sed -ri 's/PRI_kr([dux])/PRI_kl\1/g'
* defs.h (PRI_krd, PRI_kru, PRI_krx): Remove. All users updated.
Remove temporary types created for transition from long
to kernel_ulong_t.
Automatically replace kernel_scno_t and kernel_ureg_t with
kernel_ulong_t using
$ git grep -El 'kernel_(scno|ureg)_t' |
xargs sed -ri 's/kernel_(scno|ureg)_t/kernel_ulong_t/g'
* kernel_types.h (kernel_scno_t, kernel_ureg_t): Remove.
All users updated.
Prepare for the change of kernel_ureg_t and kernel_scno_t from
unsigned long to kernel_ulong_t.
* defs.h (PRI_krd, PRI_kru, PRI_krx): New temporary macros.
All users updated.
* defs.h (tprint_iov_upto): Change the type of len and data_size
arguments from unsigned long to kernel_ureg_t.
(tprint_iov): Change the type of len argument from unsigned long
to kernel_ureg_t.
* io.c (print_iovec_config): Change data_size type from unsigned long
to kernel_ureg_t.
(print_iovec): Change the type of *iov, iov_buf, and len variables
from unsigned long to kernel_ureg_t.
(tprint_iov_upto): Change the type of len and data_size arguments, and
the type of iov variable from unsigned long to kernel_ureg_t.
As about half of all printstr uses cases are invocations with the last
argument set to -1, create a dedicated function for this use case.
* defs.h (printstr): Rename to printstrn. All callers updated.
(printstr): New static inline function. All callers updated.
* defs.h (tprint_iov, tprint_iov_upto): Change address argument type
from unsigned long to kernel_ureg_t.
* io.c (tprint_iov, tprint_iov_upto): Likewise.
In x32 personality these syscalls use compat type for the 3rd argument,
therefore it has to be truncated there.
* io.c (do_preadv, do_pwritev): Truncate tcp->u_arg[2] using
widen_to_ulong.
current_klongsize checks are more universal, therefore they are usually
shorter and easier to comprehend.
* desc.c (umove_kulong_array_or_printaddr): Check for current_klongsize
instead of current_personality and current_wordsize.
* io.c (print_lld_from_low_high_val): Likewise.
* lseek.c (SYS_FUNC(lseek)): Likewise.
* resource.c (decode_rlimit): Likewise.
* syscall.c (is_negated_errno): Likewise.
* util.c (getllval, getarg_klu): Likewise.
This is the first step in the direction of revisiting current practice
of indiscriminate use of signed types for syscall arguments and memory
addresses.
* kernel_types.h (kernel_ureg_t): New type, typedef to unsigned long.
* defs.h (struct tcb): Change type of u_arg from long to kernel_ureg_t.
[HAVE_STRUCT_TCB_EXT_ARG]: Change type of ext_arg from long long
to unsigned long long.
* desc.c (decode_select): Change type of syscall arguments from long
to kernel_ureg_t.
(SYS_FUNC(oldselect)): Change type of select_args from long
to kernel_ureg_t.
* io.c (print_lld_from_low_high_val): Remove no longer needed cast
of syscall arguments to unsigned long.
* lseek.c (SYS_FUNC(lseek)): Cast syscall argument from unsigned long
to long.
* mem.c (print_mmap): Change type of syscall arguments from long
to kernel_ureg_t.
(SYS_FUNC(old_mmap), SYS_FUNC(old_mmap_pgoff)): Change type of u_arg
from long to kernel_ureg_t.
(SYS_FUNC(mmap), SYS_FUNC(mmap_pgoff), SYS_FUNC(mmap_pgoff)): Remove
no longer needed cast of syscall arguments to unsigned long.
* pathtrace.c (pathtrace_match): Change type of args and select_args
from long to kernel_ureg_t.
* util.c (getarg_ull): Remove no longer needed casts of syscall
arguments to unsigned types.
This enables printing of iovec arrays even in case of failed syscall
(failed syscall doesn't mean that iovec itself is inaccessible and
useless). One caveat here is that we should explicitly provide proper
IOV_DECODE_* value based on syserror value in case printing is performed
on exiting; we can't simply override it to IOV_DECODE_ADDR on exiting
when syserror is up, since this may be called by code which tries to
print iovec containing local data, which should be perfectly accessible
(on the other hand, there are no cases of such behaviour at the moment).
Since iovecs themselves are printed even if syscall has failed now,
preadv test is updated to reflect this. It is notable, though, that this
is the only place where this case is checked.
* io.c (tprint_iov_upto): Specify umoven_or_printaddr_ignore_syserror
instead of umoven_or_printaddr as umoven_func parameter.
(SYS_FUNC(readv), do_preadv): Specify decode_iov parameter value
based on syserror(tcp) value.
* scsi.c: (print_sg_io_v3_res, print_sg_io_v4_res): Likewise.
* tests/preadv.c: Update expected output for the case when preadv
with singe-item iovec failed.
Otherwise it can be depleted and print_iovec starts printing empty
strings.
* io.c (print_iovec): Interpret c->data_size of -1 as unlimited data
and do not decrease it in this case.
This change prevents scattering of ll-related hacks and simplifies
pread/pwrite syscalls parsers' logic a bit.
* util.c (getllval): Add fixup for arg_no for SuperH when argument
number is equal to 3.
* io.c (PREAD_OFFSET_ARG): Remove.
(SYS_FUNC(pread)): Always use argument number 3 for "count" argument
printing.
(SYS_FUNC(pwrite)): Likewise.
Introduce a general socket netlink parser which prints the header and
a string for the remaining part of the buffer. It doesn't handle all
the netlink flags and types yet because the parser needs more
information, this will be implemented later.
* net.c (decode_sockbuf): New function.
(SYS_FUNC(send), SYS_FUNC(sendto), SYS_FUNC(recv), SYS_FUNC(recvfrom)):
Use it instead of printstr.
* msghdr.c (print_msghdr): Pass IOV_DECODE_NETLINK to tprint_iov_upto()
for netlink sockets.
* netlink.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* defs.h (decode_netlink, getfdproto): New prototypes.
(iov_decode): Add IOV_DECODER_NETLINK.
* io.c (print_iovec): Use decode_netlink().
* util.c (getfdproto): Remove static keyword.
* xlat/netlink_flags.in: New file.
* xlat/netlink_types.in: New file.
Introduce a new type iov_decode which will be used instead of the integer
"decode" as a parameter.
* defs.h (iov_decode): New enum.
(tprint_iov, tprint_iov_upto): Change type of "decode_iov" to enum iov_decode.
* aio.c (print_iocb): Change type of "decode_iov" to enum iov_decode in
tprint_iov() call.
* keyctl.c (keyctl_instantiate_key_iov): Likewise.
* process.c (ptrace): Likewise.
* process_vm.c (process_vm_readv, process_vm_writev): Likewise.
* io.c (writev, do_pwritev, vmsplice): Likewise.
(print_iovec): Replace the condition with a switch.
(tprint_iov_upto): Change type of "decode_iov" to enum iov_decode.
(readv, do_preadv): Change type of "decode_iov" to enum iov_decode in
tprint_iov_upto() call.
* scsi.c (print_sg_io_v3_req, print_sg_io_v3_res, print_sg_io_v4_req,
print_sg_io_v4_res): Likewise.
* net.c (do_msghdr): Adapt call of tprint_iov_upto().
* io.c (SYS_FUNC(preadv)): Call tprint_iov_upto instead
of tprint_iov and specify syscall return value as a data size limit.
* NEWS: Mention it.
* tests/preadv.c (main): Add a test case for preadv short read.
* io.c (print_llu_from_low_high_val): Rename to
print_lld_from_low_high_val, all callers changed.
Print value as a signed integer.
* tests/preadv.c: New file.
* tests/preadv.test: New test.
* tests/pwritev.c: New file.
* tests/pwritev.test: New test.
* tests/.gitignore: Add preadv and pwritev.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(preadv_CPPFLAGS, pwritev_CPPFLAGS): New variables.
(DECODER_TESTS): Add preadv.test and pwritev.test.
* 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.
x86 is the only personality supported on x86_64
that has 32-bit syscall arguments.
* io.c (print_llu_from_low_high_val) [X86_64]: Fix
current_personality == 2 case.
* defs.h (umove_ulong_array_or_printaddr): New prototype.
* util.c (umove_ulong_array_or_printaddr): New function.
* desc.c (sys_pselect6): Use it instead of open-coding
a proxy struct parser for different personalities.
* io.c (tprint_iov_upto): Use it instead of open-coding
a struct iovec parser for different personalities.
* kexec.c (print_kexec_segments): Use it instead of open-coding
a struct kexec_segment parser for different personalities.
(print_seg): Pass arguments using an array.
* io.c (sys_read, sys_pread): Use printaddr.
(tprint_iov_upto): Do not fetch data in case of syserror.
Use printaddr.
(sys_readv, sys_preadv): Remove redundant check for syserror.
(print_off_t): Use printnum_int and printnum_long.
(print_loff_t): Use umove_or_printaddr.
Introduce SYS_FUNC macro to declare and define all syscall parsers.
* Makefile.am (BUILT_SOURCES, CLEANFILES): Add sys_func.h.
(sys_func.h): New rule.
* defs.h (SYS_FUNC_NAME, SYS_FUNC): New macros.
* linux/syscall.h: Include "sys_func.h".
[NEED_UID16_PARSERS]: Use SYS_FUNC to declare uid16 syscall parsers.
Remove other declarations.
* linux/alpha/syscallent.h (160, 161): Add sys_ prefix to osf_statfs
and osf_fstatfs syscall parsers.
* *.c: Use SYS_FUNC to define syscall parsers.
In mips n32 abi, like in most of 32-bit architectures, offset
is passed to preadv/pwritev syscalls using two syscall arguments.
* io.c (print_llu_from_low_high_val) [LINUX_MIPSN32]: Remove.
Some ioctl commands from evdev, hiddev, mixer, uinput, spi, and joystick
are parametrized by a size or a number that are variable. This change
implements printing of these parametrized ioctl command names.
* configure.ac (AC_CHECK_HEADERS): Add linux/input.h.
* defs.h (ioctl_decode_number): New prototype.
* io.c (sys_ioctl): Use ioctl_decode_number.
* ioctl.c (ioctl_decode_number): New function.
* xlat/evdev_abs.in: New file.
* xlat/evdev_ev.in: New file.
Signed-off-by: Gabriel Laskar <gabriel@lse.epita.fr>
* defs.h (ioctl_print_code): New prototype.
* ioctl.c: Include xlat/ioctl_dirs.h.
(ioctl_print_code): New function.
* io.c (sys_ioctl): Use it.
* xlat/ioctl_dirs.in: New file.
