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>
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
#ifndef MICROBLAZE_TARGET_SYSCALL_H
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#define MICROBLAZE_TARGET_SYSCALL_H
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#define UNAME_MACHINE "microblaze"
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#define UNAME_MINIMUM_RELEASE "2.6.32"
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/* We use microblaze_reg_t to keep things similar to the kernel sources. */
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typedef uint32_t microblaze_reg_t;
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struct target_pt_regs {
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microblaze_reg_t r0;
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microblaze_reg_t r1;
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microblaze_reg_t r2;
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microblaze_reg_t r3;
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microblaze_reg_t r4;
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microblaze_reg_t r5;
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microblaze_reg_t r6;
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microblaze_reg_t r7;
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microblaze_reg_t r8;
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microblaze_reg_t r9;
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microblaze_reg_t r10;
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microblaze_reg_t r11;
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microblaze_reg_t r12;
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microblaze_reg_t r13;
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microblaze_reg_t r14;
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microblaze_reg_t r15;
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microblaze_reg_t r16;
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microblaze_reg_t r17;
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microblaze_reg_t r18;
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microblaze_reg_t r19;
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microblaze_reg_t r20;
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microblaze_reg_t r21;
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microblaze_reg_t r22;
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microblaze_reg_t r23;
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microblaze_reg_t r24;
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microblaze_reg_t r25;
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microblaze_reg_t r26;
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microblaze_reg_t r27;
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microblaze_reg_t r28;
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microblaze_reg_t r29;
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microblaze_reg_t r30;
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microblaze_reg_t r31;
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microblaze_reg_t pc;
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microblaze_reg_t msr;
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microblaze_reg_t ear;
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microblaze_reg_t esr;
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microblaze_reg_t fsr;
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uint32_t kernel_mode;
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};
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#define TARGET_CLONE_BACKWARDS
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#define TARGET_MINSIGSTKSZ 2048
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#define TARGET_MCL_CURRENT 1
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#define TARGET_MCL_FUTURE 2
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#define TARGET_MCL_ONFAULT 4
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#define TARGET_WANT_NI_OLD_SELECT
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#endif
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