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/**
* sfunction set_user_string - Writes a string to user memory
* @addr: The user address to write the string to
* @val: The string which is to be written
*
* Description: Writes the given string to a given user memory address.
* Reports an error when writing to the given address fails.
* Requires the use of guru mode (-g).
*/
function set_user_string (addr:long, val:string) %{ /* guru */
__label__ deref_fault;
store_uderef_string (STAP_ARG_val, STAP_ARG_addr, MAXSTRINGLEN);
if (0) {
deref_fault: /* branched to from store_deref_string() */
snprintf (CONTEXT->error_buffer, sizeof(CONTEXT->error_buffer),
"user string copy fault at 0x%lx [man error::fault]", (uintptr_t) STAP_ARG_addr);
CONTEXT->last_error = CONTEXT->error_buffer;
}
%}
/**
* sfunction set_user_string_n - Writes a string of given length to user memory
* @addr: The user address to write the string to
* @n: The maximum length of the string
* @val: The string which is to be written
*
* Description: Writes the given string up to a maximum given length to a given
* user memory address. Reports an error on string copy fault.
* Requires the use of guru mode (-g).
*/
function set_user_string_n (addr:long, n:long, val:string) %{ /* guru */
__label__ deref_fault;
int64_t len = clamp_t(int64_t, STAP_ARG_n + 1, 1, MAXSTRINGLEN);
store_uderef_string (STAP_ARG_val, STAP_ARG_addr, len);
if (0) {
deref_fault: /* branched to from store_deref_string() */
snprintf (CONTEXT->error_buffer, sizeof(CONTEXT->error_buffer),
"user string copy fault at 0x%lx [man error::fault]", (uintptr_t) STAP_ARG_addr);
CONTEXT->last_error = CONTEXT->error_buffer;
}
%}
/**
* sfunction set_user_string_arg - Writes a string to user memory.
* @addr: The user address to write the string to
* @val: The string which is to be written
*
* Description: Writes the given string to a given user memory address.
* Reports a warning on string copy fault.
* Requires the use of guru mode (-g).
*/
function set_user_string_arg (addr:long, val:string) { /* guru */
if (val != user_string_nofault(addr)) {
try {
set_user_string_n(addr, strlen(val), val)
} catch {
warn(sprintf("unable to write %s to 0x%lx", val, addr))
}
}
}
/**
* sfunction set_user_long - Writes a long value to user memory
* @addr: The user address to write the long to
* @val: The long which is to be written
*
* Description: Writes the long value to a given user memory address.
* Reports an error when writing to the given address fails.
* Requires the use of guru mode (-g).
*/
function set_user_long (addr:long, val:long) %{ /* guru */
__label__ deref_fault;
uwrite((long *) (uintptr_t) STAP_ARG_addr, STAP_ARG_val);
if (0) {
deref_fault: /* branched to from uwrite() */
snprintf (CONTEXT->error_buffer, sizeof(CONTEXT->error_buffer),
"user long copy fault at 0x%p [man error::fault]", (void *) (uintptr_t) STAP_ARG_addr);
CONTEXT->last_error = CONTEXT->error_buffer;
}
%}
/**
* sfunction set_user_int - Writes an int value to user memory
* @addr: The user address to write the int to
* @val: The int which is to be written
*
* Description: Writes the int value to a given user memory address.
* Reports an error when writing to the given address fails.
* Requires the use of guru mode (-g).
*/
function set_user_int (addr:long, val:long) %{ /* guru */
__label__ deref_fault;
uwrite((int *) (uintptr_t) STAP_ARG_addr, STAP_ARG_val);
if (0) {
deref_fault: /* branched to from uwrite() */
snprintf (CONTEXT->error_buffer, sizeof(CONTEXT->error_buffer),
"user int copy fault at 0x%p [man error::fault]", (void *) (uintptr_t) STAP_ARG_addr);
CONTEXT->last_error = CONTEXT->error_buffer;
}
%}
/**
* sfunction set_user_short - Writes a short value to user memory
* @addr: The user address to write the short to
* @val: The short which is to be written
*
* Description: Writes the short value to a given user memory address.
* Reports an error when writing to the given address fails.
* Requires the use of guru mode (-g).
*/
function set_user_short (addr:long, val:long) %{ /* guru */
__label__ deref_fault;
uwrite((short *) (uintptr_t) STAP_ARG_addr, STAP_ARG_val);
if (0) {
deref_fault: /* branched to from uwrite() */
snprintf (CONTEXT->error_buffer, sizeof(CONTEXT->error_buffer),
"user short copy fault at 0x%p [man error::fault]", (void *) (uintptr_t) STAP_ARG_addr);
CONTEXT->last_error = CONTEXT->error_buffer;
}
%}
/**
* sfunction set_user_char - Writes a char value to user memory
* @addr: The user address to write the char to
* @val: The char which is to be written
*
* Description: Writes the char value to a given user memory address.
* Reports an error when writing to the given address fails.
* Requires the use of guru mode (-g).
*/
function set_user_char (addr:long, val:long) %{ /* guru */
__label__ deref_fault;
uwrite((char *) (uintptr_t) STAP_ARG_addr, STAP_ARG_val);
if (0) {
deref_fault: /* branched to from uwrite() */
snprintf (CONTEXT->error_buffer, sizeof(CONTEXT->error_buffer),
"user char copy fault at 0x%p [man error::fault]", (void *) (uintptr_t) STAP_ARG_addr);
CONTEXT->last_error = CONTEXT->error_buffer;
}
%}
/**
* sfunction set_user_pointer - Writes a pointer value to user memory.
* @addr: The user address to write the pointer to
* @val: The pointer which is to be written
*
* Description: Writes the pointer value to a given user memory address.
* Reports an error when writing to the given address fails.
* Requires the use of guru mode (-g).
*/
function set_user_pointer (addr:long, val:long) %{ /* guru */
__label__ deref_fault;
uwrite((void **) (uintptr_t) STAP_ARG_addr, (uintptr_t)STAP_ARG_val);
if (0) {
deref_fault: /* branched to from uwrite() */
snprintf (CONTEXT->error_buffer, sizeof(CONTEXT->error_buffer),
"user pointer copy fault at 0x%p [man error::fault]", (void *) (uintptr_t) STAP_ARG_addr);
CONTEXT->last_error = CONTEXT->error_buffer;
}
%}