COPY_REGSET_TO_USER(9) Machine State COPY_REGSET_TO_USER(9)NAME
copy_regset_to_user - fetch a thread's user_regset data into user memory
SYNOPSIS
int copy_regset_to_user(struct task_struct * target, const struct user_regset_view * view, unsigned int setno, unsigned int offset,
unsigned int size, void __user * data);
ARGUMENTS
target
thread to be examined
view
struct user_regset_view describing user thread machine state
setno
index in view->regsets
offset
offset into the regset data, in bytes
size
amount of data to copy, in bytes
data
user-mode pointer to copy into
Kernel Hackers Manual 2.6. July 2010 COPY_REGSET_TO_USER(9)
Check Out this Related Man Page
TASK_CURRENT_SYSCALL(9) Machine State TASK_CURRENT_SYSCALL(9)NAME
task_current_syscall - Discover what a blocked task is doing.
SYNOPSIS
int task_current_syscall(struct task_struct * target, long * callno, unsigned long args[6], unsigned int maxargs, unsigned long * sp,
unsigned long * pc);
ARGUMENTS
target
thread to examine
callno
filled with system call number or -1
args[6]
filled with maxargs system call arguments
maxargs
number of elements in args to fill
sp
filled with user stack pointer
pc
filled with user PC
DESCRIPTION
If target is blocked in a system call, returns zero with *callno set to the the call's number and args filled in with its arguments.
Registers not used for system call arguments may not be available and it is not kosher to use struct user_regset calls while the system
call is still in progress. Note we may get this result if target has finished its system call but not yet returned to user mode, such as
when it's stopped for signal handling or syscall exit tracing.
If target is blocked in the kernel during a fault or exception, returns zero with *callno set to -1 and does not fill in args. If so, it's
now safe to examine target using struct user_regset get calls as long as we're sure target won't return to user mode.
Returns -EAGAIN if target does not remain blocked.
Returns -EINVAL if maxargs is too large (maximum is six).
Kernel Hackers Manual 2.6. July 2010 TASK_CURRENT_SYSCALL(9)
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