02e5d7d78e
This patch implements strace argument printing functionality for following syscalls:
* mlock, munlock, mlockall, munlockall - lock and unlock memory
int mlock(const void *addr, size_t len)
int munlock(const void *addr, size_t len)
int mlockall(int flags)
int munlockall(void)
man page: https://man7.org/linux/man-pages/man2/mlock.2.html
Implementation notes:
Syscall mlockall() takes an argument that is composed of predefined values
which represent flags that determine the type of locking operation that is
to be performed. For that reason, a printing function "print_mlockall" was
stated in file "strace.list". This printing function uses an already existing
function "print_flags()" to print the "flags" argument. These flags are stated
inside an array "mlockall_flags" that contains values of type "struct flags".
These values are instantiated using an existing macro "FLAG_TARGET()" that
crates aproppriate target flag values based on those defined in files
'/target_syscall.h'. These target flag values were changed from
"TARGET_MLOCKALL_MCL*" to "TARGET_MCL_*" so that they can be aproppriately set
and recognised in "strace.c" with "FLAG_TARGET()". Value for "MCL_ONFAULT"
was added in this patch. This value was also added in "syscall.c" in function
"target_to_host_mlockall_arg()". Because this flag value was added in kernel
version 4.4, it is enwrapped in an #ifdef directive (both in "syscall.c" and
in "strace.c") as to support older kernel versions.
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". Syscall mlock2() is not implemented in
"syscall.c" and thus it's argument printing is not implemented in this patch.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200811164553.27713-4-Filip.Bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/*
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* PPC emulation for qemu: syscall definitions.
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*
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* Copyright (c) 2003 Jocelyn Mayer
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef PPC_TARGET_SYSCALL_H
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#define PPC_TARGET_SYSCALL_H
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/* XXX: ABSOLUTELY BUGGY:
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* for now, this is quite just a cut-and-paste from i386 target...
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*/
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/* default linux values for the selectors */
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#define __USER_DS (1)
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struct target_pt_regs {
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abi_ulong gpr[32];
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abi_ulong nip;
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abi_ulong msr;
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abi_ulong orig_gpr3; /* Used for restarting system calls */
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abi_ulong ctr;
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abi_ulong link;
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abi_ulong xer;
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abi_ulong ccr;
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#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
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abi_ulong softe;
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#else
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abi_ulong mq; /* 601 only (not used at present) */
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#endif
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/* Used on APUS to hold IPL value. */
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abi_ulong trap; /* Reason for being here */
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abi_ulong dar; /* Fault registers */
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abi_ulong dsisr;
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abi_ulong result; /* Result of a system call */
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};
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/* ioctls */
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struct target_revectored_struct {
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abi_ulong __map[8]; /* 256 bits */
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};
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/*
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* flags masks
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*/
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#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
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#ifdef TARGET_WORDS_BIGENDIAN
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#define UNAME_MACHINE "ppc64"
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#else
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#define UNAME_MACHINE "ppc64le"
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#endif
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#else
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#define UNAME_MACHINE "ppc"
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#endif
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#define UNAME_MINIMUM_RELEASE "2.6.32"
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#define TARGET_CLONE_BACKWARDS
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#define TARGET_MINSIGSTKSZ 2048
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#define TARGET_MCL_CURRENT 0x2000
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#define TARGET_MCL_FUTURE 0x4000
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#define TARGET_MCL_ONFAULT 0x8000
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#define TARGET_WANT_NI_OLD_SELECT
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#endif /* PPC_TARGET_SYSCALL_H */
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