Linux Certif

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user_regset_get_fn

NAME

user_regset_get_fn - type of get function in struct user_regset

SYNOPSIS

typedef int user_regset_get_fn(struct task_struct * target, const struct user_regset * regset, unsigned int pos, unsigned int count, void * kbuf, void __user * ubuf);

ARGUMENTS

target

thread being examined

regset

regset being examined

pos

offset into the regset data to access, in bytes

count

amount of data to copy, in bytes

kbuf

if not NULL, a kernel-space pointer to copy into

ubuf

if kbuf is NULL, a user-space pointer to copy into

DESCRIPTION

Fetch register values. Return 0 on success; -EIO or -ENODEV are usual failure returns. The pos and count values are in bytes, but must be properly aligned. If kbuf is non-null, that buffer is used and ubuf is ignored. If kbuf is NULL, then ubuf gives a userland pointer to access directly, and an -EFAULT return value is possible.