print_syscall_err() relies on the sign of the returned value to know
if it is an errno value or not.
But in some cases the returned value can have the most signicant bit
set without being an errno.
This patch restores previous behaviour that was also checking if
we can decode the errno to validate it.
This patch fixes this kind of problem (qemu-m68k):
root@sid:/# QEMU_STRACE= ls
3 brk(NULL) = -1 errno=21473607683 uname(0x407fff8a) = 0
to become:
root@sid:/# QEMU_STRACE= ls
3 brk(NULL) = 0x8001e000
3 uname(0xffffdf8a) = 0
Fixes: c84be71f68 ("linux-user: Extend strace support to enable argument printing after syscall execution")
Cc: Filip.Bozuta@syrmia.com
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200708152435.706070-3-laurent@vivier.eu>
errno of the target is returned as a negative value by the syscall,
not in the host errno variable.
The emulation of the target syscall can return an error while the
host doesn't set an errno value. Target errnos and host errnos can
also differ in some cases.
Fixes: c84be71f68 ("linux-user: Extend strace support to enable argument printing after syscall execution")
Cc: Filip.Bozuta@syrmia.com
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Message-Id: <20200708152435.706070-2-laurent@vivier.eu>
In new functions print_ioctl() and print_syscall_ret_ioctl(), we don't
check if lock_user() returns NULL and this would cause a segfault in
thunk_print().
If lock_user() returns NULL don't call thunk_print() but prints only the
value of the (invalid) pointer.
Tested with:
# cat ioctl.c
#include <unistd.h>
#include <sys/ioctl.h>
int main(void)
{
int ret;
ret = ioctl(STDOUT_FILENO, TCGETS, 0xdeadbeef);
ret = ioctl(STDOUT_FILENO, TCSETSF, 0xdeadbeef);
return 0;
}
# QEMU_STRACE= ./ioctl
...
578 ioctl(1,TCGETS,0xdeadbeef) = -1 errno=2 (Bad address)
578 ioctl(1,TCSETSF,0xdeadbeef) = -1 errno=2 (Bad address)
...
# QEMU_STRACE= passwd
...
623 ioctl(0,TCGETS,0x3fffed04) = 0 ({})
623 ioctl(0,TCSETSF,{}) = 0
...
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Fixes: 79482e5987 ("linux-user: Add strace support for printing arguments of ioctl()")
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
This patch implements functionality for strace argument printing for ioctls.
When running ioctls through qemu with "-strace", they get printed in format:
"ioctl(fd_num,0x*,0x*) = ret_value"
where the request code an the ioctl's third argument get printed in a hexadicemal
format. This patch changes that by enabling strace to print both the request code
name and the contents of the third argument. For example, when running ioctl
RTC_SET_TIME with "-strace", with changes from this patch, it gets printed in
this way:
"ioctl(3,RTC_SET_TIME,{12,13,15,20,10,119,0,0,0}) = 0"
In case of IOC_R type ioctls, the contents of the third argument get printed
after the return value, and the argument inside the ioctl call gets printed
as pointer in hexadecimal format. For example, when running RTC_RD_TIME with
"-strace", with changes from this patch, it gets printed in this way:
"ioctl(3,RTC_RD_TIME,0x40800374) = 0 ({22,9,13,11,5,120,0,0,0})"
In case of IOC_RW type ioctls, the contents of the third argument get printed
both inside the ioctl call and after the return value.
Implementation notes:
Functions "print_ioctl()" and "print_syscall_ret_ioctl()", that are defined
in "strace.c", are listed in file "strace.list" as "call" and "result"
value for ioctl. Structure definition "IOCTLEntry" as well as predefined
values for IOC_R, IOC_W and IOC_RW were cut and pasted from file "syscall.c"
to file "qemu.h" so that they can be used by these functions to print the
contents of the third ioctl argument. Also, the "static" identifier for array
"ioctl_entries[]" was removed and this array was declared as "extern" in "qemu.h"
so that it can also be used by these functions. To decode the structure type
of the ioctl third argument, function "thunk_print()" was defined in file
"thunk.c" and its definition is somewhat simillar to that of function
"thunk_convert()".
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200619124727.18080-3-filip.bozuta@syrmia.com>
[lv: fix close-bracket]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This patch implements strace argument printing functionality for following syscall:
*fallocate - manipulate file space
int fallocate(int fd, int mode, off_t offset, off_t len)
man page: https://www.man7.org/linux/man-pages/man2/fallocate.2.html
Implementation notes:
This syscall's second argument "mode" is composed of predefined values
which represent flags that determine the type of operation that is
to be performed on the file space. For that reason, a printing
function "print_fallocate" was stated in file "strace.list". This printing
function uses an already existing function "print_flags()" to print flags of
the "mode" argument. These flags are stated inside an array "falloc_flags"
that contains values of type "struct flags". These values are instantiated
using an existing macro "FLAG_GENERIC()". Most of these flags are defined
after kernel version 3.0 which is why they are enwrapped in an #ifdef
directive.
The syscall's third ant fourth argument are of type "off_t" which can
cause variations between 32/64-bit architectures. To handle this variation,
function "target_offset64()" was copied from file "strace.c" and used in
"print_fallocate" to print "off_t" arguments for 32-bit architectures.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200619123331.17387-7-filip.bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This patch implements strace argument printing functionality for syscalls:
*chown, lchown - change ownership of a file
int chown(const char *pathname, uid_t owner, gid_t group)
int lchown(const char *pathname, uid_t owner, gid_t group)
man page: https://www.man7.org/linux/man-pages/man2/lchown.2.html
Implementation notes:
Both syscalls use strings as arguments and thus a separate
printing function was stated in "strace.list" for them.
Both syscalls share the same number and types of arguments
and thus share a same definition in file "syscall.c".
This defintion uses existing functions "print_string()" to
print the string argument and "print_raw_param()" to print
other two arguments that are of basic types.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200619123331.17387-6-filip.bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This patch implements strace argument printing functionality for syscall:
*lseek - reposition read/write file offset
off_t lseek(int fd, off_t offset, int whence)
man page: https://www.man7.org/linux/man-pages/man2/lseek.2.html
Implementation notes:
The syscall's third argument "whence" has predefined values:
"SEEK_SET","SEEK_CUR","SEEK_END","SEEK_DATA","SEEK_HOLE"
and thus a separate printing function "print_lseek" was stated
in file "strace.list". This function is defined in "strace.c"
by using an existing function "print_raw_param()" to print
the first and second argument and a switch(case) statement
for the predefined values of the third argument.
Values "SEEK_DATA" and "SEEK_HOLE" are defined in kernel version 3.1.
That is the reason why case statements for these values are
enwrapped in #ifdef directive.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200619123331.17387-5-filip.bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This patch implements strace argument printing functionality for following syscalls:
*getxattr, lgetxattr, fgetxattr - retrieve an extended attribute value
ssize_t getxattr(const char *path, const char *name, void *value, size_t size)
ssize_t lgetxattr(const char *path, const char *name, void *value, size_t size)
ssize_t fgetxattr(int fd, const char *name, void *value, size_t size)
man page: https://www.man7.org/linux/man-pages/man2/getxattr.2.html
*listxattr, llistxattr, flistxattr - list extended attribute names
ssize_t listxattr(const char *path, char *list, size_t size)
ssize_t llistxattr(const char *path, char *list, size_t size)
ssize_t flistxattr(int fd, char *list, size_t size)
man page: https://www.man7.org/linux/man-pages/man2/listxattr.2.html
*removexattr, lremovexattr, fremovexattr - remove an extended attribute
int removexattr(const char *path, const char *name)
int lremovexattr(const char *path, const char *name)
int fremovexattr(int fd, const char *name)
man page: https://www.man7.org/linux/man-pages/man2/removexattr.2.html
Implementation notes:
All of the syscalls have strings as argument types and thus a separate
printing function was stated in file "strace.list" for every one of them.
All of these printing functions were defined in "strace.c" using existing
printing functions for appropriate argument types:
"print_string()" - for (const char*) type
"print_pointer()" - for (char*) and (void *) type
"print_raw_param()" for (int) and (size_t) type
Syscalls "getxattr()" and "lgetxattr()" have the same number and type of
arguments and thus their print functions ("print_getxattr", "print_lgetxattr")
share a same definition. The same statement applies to syscalls "listxattr()"
and "llistxattr()".
Function "print_syscall_ret_listxattr()" was added to print the returned list
of extended attributes for syscalls "print_listxattr(), print_llistxattr() and
print_flistxattr()".
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200619123331.17387-4-filip.bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This patch implements strace argument printing functionality for following syscalls:
*acct - switch process accounting on or off
int acct(const char *filename)
man page: https://www.man7.org/linux/man-pages/man2/acct.2.html
*fsync, fdatasync - synchronize a file's in-core state with storage device
int fsync(int fd)
int fdatasync(int fd)
man page: https://www.man7.org/linux/man-pages/man2/fsync.2.html
*listen - listen for connections on a socket
int listen(int sockfd, int backlog)
man page: https://www.man7.org/linux/man-pages/man2/listen.2.html
Implementation notes:
Syscall acct() takes string as its only argument and thus a separate
print function "print_acct" is stated in file "strace.list". This
function is defined and implemented in "strace.c" by using an
existing function used to print string arguments: "print_string()".
All the other syscalls have only primitive argument types, so the
rest of the implementation was handled by stating an appropriate
printing format in file "strace.list".
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200619123331.17387-3-filip.bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Structure "struct syscallname" in file "strace.c" is used for "-strace"
to print arguments and return values of syscalls. The last field of
this structure "result" represents the calling function that prints the
return values. This field was extended in this patch so that this function
takes all syscalls arguments beside the return value. In this way, it enables
"-strace" to print arguments of syscalls that have changed after the syscall
execution. This extension will be useful as there are many syscalls that
return values inside their arguments (i.e. listxattr() that returns the list
of extended attributes inside the "list" argument).
Implementation notes:
Since there are already three existing "print_syscall_ret*" functions inside
"strace.c" ("print_syscall_ret_addr()", "print_syscall_ret_adjtimex()",
"print_syscall_ret_newselect()"), they were changed to have all syscall arguments
beside the return value. This was done so that these functions don't cause build
errors (even though syscall arguments are not used in these functions).
There is code repetition in these functions for checking the return value
and printing the approppriate error message (this code is also located in
print_syscall_ret() at the end of "strace.c"). That is the reason why a
function "syscall_print_err()" was added for this code and put inside these
functions. Functions "print_newselect()" and "print_syscall_ret_newselect()"
were changed to use this new implemented functionality and not store the syscall
argument values in separate static variables.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200619123331.17387-2-filip.bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
New y2038 safe 32-bit architectures (like RISC-V) don't support old
syscalls with a 32-bit time_t. The kernel defines new *_time64 versions
of these syscalls. Add some more #ifdefs to syscall.c in linux-user to
allow us to compile without these old syscalls.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <9ffc3cc6226756895157f16622be5f6edfa2aee6.1584051142.git.alistair.francis@wdc.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
print_socket_type() doesn't manage flags and the correct type cannot
be displayed
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200312165530.53450-1-laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This change switches linux-user strace logging to use the newer `qemu_log`
logging subsystem rather than the older `gemu_log` (notice the "g")
logger. `qemu_log` has several advantages, namely that it allows logging
to a file, and provides a more unified interface for configuration
of logging (via the QEMU_LOG environment variable or options).
This change introduces a new log mask: `LOG_STRACE` which is used for
logging of user-mode strace messages.
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Josh Kunz <jkz@google.com>
Message-Id: <20200204025416.111409-3-jkz@google.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
If the format is not the syscall last argument, a comma is append.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20191021114857.20538-9-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Extract common print_sockfd() from various socket related syscalls.
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20191021114857.20538-7-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
All of the flags need to be conditional as old systems don't have
statx support. Otherwise it works the same as other stat family
syscalls. This requires the pending patch to add statx support.
Tested on Ubuntu 16.04 (no host statx) and Ubuntu 19.04 (with host
statx) using a riscv32-linux toolchain.
Signed-off-by: Jim Wilson <jimw@sifive.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <1561718618-20218-3-git-send-email-aleksandar.markovic@rt-rk.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Most files that have TABs only contain a handful of them. Change
them to spaces so that we don't confuse people.
disas, standard-headers, linux-headers and libdecnumber are imported
from other projects and probably should be exempted from the check.
Outside those, after this patch the following files still contain both
8-space and TAB sequences at the beginning of the line. Many of them
have a majority of TABs, or were initially committed with all tabs.
bsd-user/i386/target_syscall.h
bsd-user/x86_64/target_syscall.h
crypto/aes.c
hw/audio/fmopl.c
hw/audio/fmopl.h
hw/block/tc58128.c
hw/display/cirrus_vga.c
hw/display/xenfb.c
hw/dma/etraxfs_dma.c
hw/intc/sh_intc.c
hw/misc/mst_fpga.c
hw/net/pcnet.c
hw/sh4/sh7750.c
hw/timer/m48t59.c
hw/timer/sh_timer.c
include/crypto/aes.h
include/disas/bfd.h
include/hw/sh4/sh.h
libdecnumber/decNumber.c
linux-headers/asm-generic/unistd.h
linux-headers/linux/kvm.h
linux-user/alpha/target_syscall.h
linux-user/arm/nwfpe/double_cpdo.c
linux-user/arm/nwfpe/fpa11_cpdt.c
linux-user/arm/nwfpe/fpa11_cprt.c
linux-user/arm/nwfpe/fpa11.h
linux-user/flat.h
linux-user/flatload.c
linux-user/i386/target_syscall.h
linux-user/ppc/target_syscall.h
linux-user/sparc/target_syscall.h
linux-user/syscall.c
linux-user/syscall_defs.h
linux-user/x86_64/target_syscall.h
slirp/cksum.c
slirp/if.c
slirp/ip.h
slirp/ip_icmp.c
slirp/ip_icmp.h
slirp/ip_input.c
slirp/ip_output.c
slirp/mbuf.c
slirp/misc.c
slirp/sbuf.c
slirp/socket.c
slirp/socket.h
slirp/tcp_input.c
slirp/tcpip.h
slirp/tcp_output.c
slirp/tcp_subr.c
slirp/tcp_timer.c
slirp/tftp.c
slirp/udp.c
slirp/udp.h
target/cris/cpu.h
target/cris/mmu.c
target/cris/op_helper.c
target/sh4/helper.c
target/sh4/op_helper.c
target/sh4/translate.c
tcg/sparc/tcg-target.inc.c
tests/tcg/cris/check_addo.c
tests/tcg/cris/check_moveq.c
tests/tcg/cris/check_swap.c
tests/tcg/multiarch/test-mmap.c
ui/vnc-enc-hextile-template.h
ui/vnc-enc-zywrle.h
util/envlist.c
util/readline.c
The following have only TABs:
bsd-user/i386/target_signal.h
bsd-user/sparc64/target_signal.h
bsd-user/sparc64/target_syscall.h
bsd-user/sparc/target_signal.h
bsd-user/sparc/target_syscall.h
bsd-user/x86_64/target_signal.h
crypto/desrfb.c
hw/audio/intel-hda-defs.h
hw/core/uboot_image.h
hw/sh4/sh7750_regnames.c
hw/sh4/sh7750_regs.h
include/hw/cris/etraxfs_dma.h
linux-user/alpha/termbits.h
linux-user/arm/nwfpe/fpopcode.h
linux-user/arm/nwfpe/fpsr.h
linux-user/arm/syscall_nr.h
linux-user/arm/target_signal.h
linux-user/cris/target_signal.h
linux-user/i386/target_signal.h
linux-user/linux_loop.h
linux-user/m68k/target_signal.h
linux-user/microblaze/target_signal.h
linux-user/mips64/target_signal.h
linux-user/mips/target_signal.h
linux-user/mips/target_syscall.h
linux-user/mips/termbits.h
linux-user/ppc/target_signal.h
linux-user/sh4/target_signal.h
linux-user/sh4/termbits.h
linux-user/sparc64/target_syscall.h
linux-user/sparc/target_signal.h
linux-user/x86_64/target_signal.h
linux-user/x86_64/termbits.h
pc-bios/optionrom/optionrom.h
slirp/mbuf.h
slirp/misc.h
slirp/sbuf.h
slirp/tcp.h
slirp/tcp_timer.h
slirp/tcp_var.h
target/i386/svm.h
target/sparc/asi.h
target/xtensa/core-dc232b/xtensa-modules.inc.c
target/xtensa/core-dc233c/xtensa-modules.inc.c
target/xtensa/core-de212/core-isa.h
target/xtensa/core-de212/xtensa-modules.inc.c
target/xtensa/core-fsf/xtensa-modules.inc.c
target/xtensa/core-sample_controller/core-isa.h
target/xtensa/core-sample_controller/xtensa-modules.inc.c
target/xtensa/core-test_kc705_be/core-isa.h
target/xtensa/core-test_kc705_be/xtensa-modules.inc.c
tests/tcg/cris/check_abs.c
tests/tcg/cris/check_addc.c
tests/tcg/cris/check_addcm.c
tests/tcg/cris/check_addoq.c
tests/tcg/cris/check_bound.c
tests/tcg/cris/check_ftag.c
tests/tcg/cris/check_int64.c
tests/tcg/cris/check_lz.c
tests/tcg/cris/check_openpf5.c
tests/tcg/cris/check_sigalrm.c
tests/tcg/cris/crisutils.h
tests/tcg/cris/sys.c
tests/tcg/i386/test-i386-ssse3.c
ui/vgafont.h
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20181213223737.11793-3-pbonzini@redhat.com>
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Eric Blake <eblake@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add support for SO_REUSEPORT, including strace support. SO_REUSEPORT
was introduced relatively recently, since Linux 3.9, so use
'#if defined SO_REUSEPORT'.
Signed-off-by: Yunqiang Su <ysu@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <1540904108-30873-4-git-send-email-aleksandar.markovic@rt-rk.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Add ability to target platforms to individually include user-mode
support for system calls from "stat" group of system calls.
This change is related to new nanoMIPS platform in the sense that
it supports a different set of "stat" system calls than any other
target. nanoMIPS does not support structures stat and stat64 at
all. Also, support for certain number of other system calls is
dropped in nanoMIPS (those are most of the time obsoleted system
calls).
Without this patch, build for nanoMIPS would fail.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
Since O_TMPFILE might differ between guest and host,
add it to the bitmask_transtbl. While at it, fix the definitions
of O_DIRECTORY etc which should arm32 according to kernel sources.
This fixes open14 and openat03 ltp testcases. Fixes:
https://bugs.launchpad.net/qemu/+bug/1709170
This commit adds support for printing the content of the target_siginfo_t
structure in a similar way to how it is printed by the host strace. The
pointer to this structure is sent as the last argument of the
rt_sigqueueinfo() and rt_tgsigqueueinfo() system calls.
For this purpose, print_siginfo() is used and the get_target_siginfo()
function is implemented in order to get the information obtained from
the pointer into the form that print_siginfo() expects.
The get_target_siginfo() function is based on
host_to_target_siginfo_noswap() in linux-user mode, but here both
arguments are pointers to target_siginfo_t, so instead of converting
the information to siginfo_t it just extracts and copies it to a
target_siginfo_t structure.
Prior to this commit, typical strace output used to look like this:
8307 rt_sigqueueinfo(8307,50,0x00000040007ff6b0) = 0
After this commit, it looks like this:
8307 rt_sigqueueinfo(8307,50,{si_signo=50, si_code=SI_QUEUE, si_pid=8307,
si_uid=1000, si_sigval=17716762128}) = 0
Signed-off-by: Miloš Stojanović <Milos.Stojanovic@rt-rk.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This patch improves the consistentcy of the output from print_siginfo()
by removing spaces around the equal sign of si_pid, si_uid, si_timer1,
si_timer2, si_band, si_fd, si_addr, si_status and si_sigval. This way
they match si_signo and ci_code. Host strace was used as a reference
for this chage.
Prior to this commit, typical strace output used to look like this:
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit improves strace support for syscall rt_tgsigqueueinfo().
Prior to this commit, typical strace output used to look like this:
7775 rt_tgsigqueueinfo(7775,7775,50,1996483164,0,0) = 0
After this commit, it looks like this:
7775 rt_tgsigqueueinfo(7775,7775,50,0x76ffea5c) = 0
Signed-off-by: Miloš Stojanović <Milos.Stojanovic@rt-rk.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Improve strace support for syscall tkill(), tgkill() and rt_sigqueueinfo()
by implementing print functions that match arguments types of the system
calls and add them to the corresponding starce.list entry.
tkill:
Prior to this commit, typical strace output used to look like this:
4886 tkill(4886,50,0,4832615904,0,-9151031864016699136) = 0
After this commit, it looks like this:
4886 tkill(4886,50) = 0
tgkill:
Prior to this commit, typical strace output used to look like this:
4890 tgkill(4890,4890,50,8,4832630528,4832615904) = 0
After this commit, it looks like this:
4890 tgkill(4890,4890,50) = 0
rt_sigqueueinfo:
Prior to this commit, typical strace output used to look like this:
8307 rt_sigqueueinfo(8307,50,1996483164,0,0,50) = 0
After this commit, it looks like this:
8307 rt_sigqueueinfo(8307,50,0x00000040007ff6b0) = 0
Signed-off-by: Miloš Stojanović <Milos.Stojanovic@rt-rk.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This patch implements Qemu user mode clock_adjtime() syscall support.
The implementation is based on invocation of host's clock_adjtime().
Signed-off-by: Aleksandar Rikalo <aleksandar.rikalo@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
There are currently several problems related to syslog() support.
For example, if the second argument "bufp" of target syslog() syscall
is NULL, the current implementation always returns error code EFAULT.
However, NULL is a perfectly valid value for the second argument for
many use cases of this syscall. This is, for example, visible from
this excerpt of man page for syslog(2):
> EINVAL Bad arguments (e.g., bad type; or for type 2, 3, or 4, buf is
> NULL, or len is less than zero; or for type 8, the level is
> outside the range 1 to 8).
Moreover, the argument "bufp" is ignored for all cases of values of the
first argument, except 2, 3 and 4. This means that for such cases
(the first argument is not 2, 3 or 4), there is no need to pass "buf"
between host and target, and it can be set to NULL while calling host's
syslog(), without loss of emulation accuracy.
Note also that if "bufp" is NULL and the first argument is 2, 3 or 4, the
correct returned error code is EINVAL, not EFAULT.
All these details are reflected in this patch.
"#ifdef TARGET_NR_syslog" is also proprerly inserted when needed.
Support for Qemu's "-strace" switch for syslog() syscall is included too.
LTP tests syslog11 and syslog12 pass with this patch (while fail without
it), on any platform.
Changes to original patch by Riku Voipio:
fixed error paths in TARGET_SYSLOG_ACTION_READ_ALL to match
http://lxr.free-electrons.com/source/kernel/printk/printk.c?v=4.7#L1335
Should fix also the build error in:
https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg03721.html
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Since not all Linux host platforms support socketcall() (most notably
Intel), do_socketcall() function in Qemu's syscalls.c is implemented to
mirror the corespondant implementation of socketcall() in Linux kernel,
and to utilise individual socket operations that are supported on all
Linux platforms. (see kernel source file net/socket.c, definition of
socketcall).
However, error codes produced by Qemu implementation are wrong for the
cases of invalid values of the first argument. Also, naming of constants
is not consistent with kernel one, and not consistant with Qemu convention
of prefixing such constants with "TARGET_". This patch in that light
brings do_socketcall() closer to its kernel counterpart, and in that way
fixes the errors and yields more consisrtent Qemu code.
There were also three missing cases (among 20) for strace support for
socketcall(). The array that contains pointers for appropriate printing
functions is updated with 3 elements, however pointers to functions are
left NULL, and its implementation is left for future.
Also, this patch fixes failure of LTP test socketcall02, if executed on some
Qemu emulated sywstems (uer mode).
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This patch implements Qemu user mode adjtimex() syscall support.
Syscall adjtimex() reads and optionally sets parameters for a clock
adjustment algorithm used in network synchonization or similar scenarios.
Its declaration is:
int adjtimex(struct timex *buf);
The correspondent source code in the Linux kernel is at kernel/time.c,
line 206.
The Qemu implementation is based on invocation of host's adjtimex(), and
its key part is in the "TARGET_NR_adjtimex" case segment of the the main
switch statement of the function do_syscall(), in linux-user/syscalls.c. All
necessary conversions of the data structures from target to host and from
host to target are covered. Two new functions, target_to_host_timex() and
host_to_target_timex(), are provided for the purpose of such conversions.
For that purpose, the support for related structure "timex" had tp be added
to the file linux-user/syscall_defs.h, based on its definition in Linux
kernel. Also, the relevant support for "-strace" Qemu option is included
in files linux-user/strace.c and linux-user/strace.list.
This patch also fixes failures of LTP tests adjtimex01 and adjtimex02, if
executed in Qemu user mode.
Signed-off-by: Aleksandar Rikalo <aleksandar.rikalo@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Native strace reports when the process being traced takes a signal:
--- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} ---
Report something similar when QEMU is doing its internal strace of
the guest process and is about to deliver it a signal.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Support the F_GETPIPE_SZ and F_SETPIPE_SZ fcntl operations.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
qemu/osdep.h checks whether MAP_ANONYMOUS is defined, but this check
is bogus without a previous inclusion of sys/mman.h. Include it in
sysemu/os-posix.h and remove it from everywhere else.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Make target_strerror() return 'const char *' rather than just 'char *';
this will allow us to return constant strings from it for some special
cases.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Clean up includes so that osdep.h is included first and headers
which it implies are not included manually.
This commit was created with scripts/clean-includes.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1453832250-766-10-git-send-email-peter.maydell@linaro.org
Pass the 'last' parameter of print_signal() through to
print_raw_param(); this fixes a problem where we weren't printing
the comma separator for strace of rt_sigaction() when the signal
was an unnamed (ie realtime) one:
6856 rt_sigaction(230xf6fff870,0xf6fff8fc) = 0
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Correct the printing of errnos for syscalls which are handled
via print_syscall_ret_addr (mmap, mmap2, brk, shmat): errnos
are returned as negative returned values at this level, not
via the host 'errno' variable.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
While debugging some issues with QEMU_STRACE I stumbled over segmentation
faults that were pretty reproducible. Turns out we tried to treat a
normal return value as errno, resulting in an access over array boundaries
for the resolution.
Fix this by allowing failure to resolve invalid errnos into strings.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
