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These commands were introduced in Linux commit v4.15-rc1~110^2~9.
* xlat/pr_sve_vl_flags.in: New file.
* xlat/prctl_options.in: Likewise.
* prctl.c: Include "xstring.h" and "xlat/pr_sve_vl_flags.h".
[!PR_SVE_VL_LEN_MASK] (PR_SVE_VL_LEN_MASK): New macro constant.
(sprint_sve_val): New function.
(SYS_FUNC(prctl)): Add decoding for PR_SVE_GET_VL and PR_SVE_SET_VL
commands.
* NEWS: Mention it.
Linux socket filter uses almost the same classic BPF as seccomp filter,
The only difference noticeable from strace PoV is the meaning of generic
multiuse field.
Transform the parser of seccomp filters to a more generic parser
of classic BPF, parametrized with a method of parsing the generic
multiuse field in BPF_STMT.
* bpf_filter.c: New file.
* bpf_filter.h: Likewise.
* bpf_fprog.h: Likewise.
* bpf_seccomp_filter.c: Likewise.
* fetch_bpf_fprog.c: Likewise.
* fetch_seccomp_fprog.c: Remove.
* seccomp_fprog.h: Likewise.
* Makefile.am (strace_SOURCES): Add bpf_filter.c, bpf_filter.h,
bpf_fprog.h, bpf_seccomp_filter.c, and fetch_bpf_fprog.c.
Remove fetch_seccomp_fprog.c and seccomp_fprog.h.
* seccomp.c: Do not include linux/filter.h and xlat header files.
Do not define SECCOMP_RET_ACTION.
(bpf_filter, decode_bpf_code, decode_bpf_stmt, decode_bpf_jump,
print_bpf_filter, print_seccomp_fprog, print_seccomp_filter): Remove.
* defs.h (print_seccomp_filter): Rename to decode_seccomp_fprog.
(SYS_FUNC(seccomp)): Replace print_seccomp_filter
with decode_seccomp_fprog.
* prctl.c (SYS_FUNC(prctl)): Likewise.
Since there is no compat handler for x32/n32, kernel returns kernel's
long as a result of the call.
Interesting, does any callee out there actually care to have enough room
allocated for kernel long?
* prctl.c (SYS_FUNC(prctl)): Use printnum_kptr instead of printnum_ptr
to print the value stored at address pointed by addr2 argument
of PR_GET_TID_ADDRESS operation.
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.
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 (printaddr_ull): Rename to printaddr_klu, change argument
type from unsigned long long to kernel_ulong_t. All callers updated.
(getarg_ull): Rename to getarg_klu, change return value type
from unsigned long long to kernel_ulong_t. All callers updated.
(PRI_kl, PRI_kld, PRI_klu, PRI_klx): New macros.
* bjm.c (SYS_FUNC(init_module)): Print kernel_ulong_t type using
PRI_klu format.
* desc.c (SYS_FUNC(pselect6)): Likewise.
* fadvise.c (SYS_FUNC(fadvise64)): Likewise.
* lookup_dcookie.c (SYS_FUNC(lookup_dcookie)): Likewise.
* mq.c (SYS_FUNC(mq_timedsend), SYS_FUNC(mq_timedreceive)): Likewise.
* kcmp.c (SYS_FUNC(kcmp)): Print kernel_ulong_t type using
PRI_klx format.
* keyctl.c (SYS_FUNC(keyctl)): Likewise.
* pkeys.c (SYS_FUNC(pkey_alloc)): Likewise.
* prctl.c (print_prctl_args, SYS_FUNC(prctl), SYS_FUNC(arch_prctl)):
Print kernel_ulong_t type using PRI_kld, PRI_klu, or PRI_klx format.
* util.c (printaddr_ull): Rename to printaddr_klu, change argument
type from unsigned long long to kernel_ulong_t, print it using
PRI_klx format.
(getarg_ull): Rename to getarg_klu, change return value type
from unsigned long long to kernel_ulong_t, print it using
PRI_klx format.
* xlat/pr_dumpable.in: New file.
* prctl.c: Include "xlat/pr_dumpable.h".
(SYS_FUNC(prctl)): Decode returned value of PR_GET_DUMPABLE operation
and the second syscall argument of PR_SET_DUMPABLE operation
as SUID_DUMP_* constants.
Kernel code does this when compares it with -1 (apart from comparing it with
PR_SET_PTRACER_ANY, which is also -1) in security/yama/yama_lsm.c.
* prctl.c (SYS_FUNC(prctl)) <PR_SET_PTRACER>: Cast arg2 to int before
comparing it with -1.
The prctl syscall does not use compat on x32/n32, so argument types
are in fact kernel_ulong_t.
* prctl.c (print_prctl_args): Use getarg_ull, print as "%#llx" instead
of "%#lx".
(SYS_FUNC(prctl)): Use getarg_ull to store call arguments in arg2, arg3,
arg4, arg5 variables of type unsigned long long. Use them in printing
routines.
(SYS_FUNC(arch_prctl)): Use getarg_ull to store call argument in addr
variable of type unsigned long long. Print it as "%#llx" instead of
"%#lx".
There are no users of prctl function in prctl.c, and all the rest
is provided by <linux/prctl.h> anyway.
* prctl.c: Include <linux/prctl.h> instead of <sys/prctl.h>.
* prctl.c (SYS_FUNC(prctl)): Use printstr_ex with QUOTE_0_TERMINATED
instead of printstr to print the argument of PR_SET_NAME and PR_GET_NAME
operations.
* prctl.c (SYS_FUNC(prctl)): Print 2nd syscall argument
of PR_CAPBSET_DROP, PR_CAPBSET_READ, PR_CAP_AMBIENT, PR_MCE_KILL,
and PR_SET_SECCOMP using printxval_long.
Print 2nd syscall argument of PR_SET_SECUREBITS using printflags_long.
Print 3rd syscall argument of PR_CAP_AMBIENT and PR_MCE_KILL using
printxval_long.
* tests/prctl-seccomp-strict.c (main): Update.
Consistently treat operation argument of prctl/arch_prctl syscalls
as int to match the kernel behaviour.
* prctl.c (SYS_FUNC(prctl), SYS_FUNC(arch_prctl)): Assign 1st argument
of syscalls to a variable of type unsigned int and use it in all
subsequent checks and lookups.
* fcntl.c (print_fcntl, SYS_FUNC(fcntl), SYS_FUNC(fcntl64)):
Cast 2nd argument of xlookup to unsigned long.
* prctl.c (SYS_FUNC(prctl)): Likewise.
* sched.c (SYS_FUNC(sched_getscheduler)): Likewise.
* time.c (do_adjtimex): Likewise.
* ioprio.c (sprint_ioprio): Change type of the argument
and local variables from int to unsigned int.
* keyctl.c (print_keyring_serial_number): Cast 2nd argument
of xlookup to unsigned int.
* net.c (tprint_sock_type): Change type of the argument to unsigned int.
* printmode.c (sprintmode): Likewise.
* printsiginfo.c (printsigval): Change type of si_code argument
to unsigned int.
Before this change, all files that exist since 20th century had
copyright headers, while most files that appeared later didn't. This
change fixes the inconsistency by adding missing copyright headers.
It doesn't mean that copyright headers became maintained. In my view,
git history provides much better information on this subject and is much
more accurate than copyright headers.
The use of printargs introduced by commit v4.10-179-g210a6b6 is wrong:
when the first argument is already printed, printargs cannot be called.
* prctl.c (print_prctl_args): New function.
(sys_prctl): Use it.
With this change, printnum_* printers will not attempt to fetch data
in case of exiting(tcp) && syserror(tcp).
All "at exiting" decoders that call these printers have been made
ready for this change in previous commits.
* util.c (DEF_PRINTNUM, DEF_PRINTPAIR): Use umove_or_printaddr.
* prctl.c (prctl_exit): Use printnum_int and printnum_long.
(sys_arch_prctl): Do not check for syserror.
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.
* configure.ac (AC_CHECK_HEADERS): Add linux/securebits.h.
* prctl.c (sys_prctl): Implement full decoding of all PR_* constants
as defined in linux v3.19.
(sys_arch_prctl): Fix decoding of unknown commands.
* xlat/cap.in: New file.
* xlat/pr_mce_kill.in: New file.
* xlat/pr_mce_kill_policy.in: New file.
* xlat/pr_set_mm.in: New file.
* xlat/pr_tsc.in: New file.
* xlat/pr_unalign_flags.in: New file.
* xlat/secbits.in: New file.
* xlat/prctl_options.in: Remove non-linux constants, add fallback
definitions.
* xlat/seccomp_mode.in: Add fallback definitions.
Since sys_prctl is referenced by syscallent files unconditionally,
conditional compilation of sys_prctl depending on prctl availability is
pointless.
* prctl.c (unalignctl_string, sys_prctl): Compile unconditionally.
