linux/kernel/trace/trace_probe_tmpl.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Traceprobe fetch helper inlines
 */

static nokprobe_inline void
fetch_store_raw(unsigned long val, struct fetch_insn *code, void *buf)
{ … }

static nokprobe_inline void
fetch_apply_bitfield(struct fetch_insn *code, void *buf)
{ … }

/*
 * These functions must be defined for each callsite.
 * Return consumed dynamic data size (>= 0), or error (< 0).
 * If dest is NULL, don't store result and return required dynamic data size.
 */
static int
process_fetch_insn(struct fetch_insn *code, void *rec, void *edata,
		   void *dest, void *base);
static nokprobe_inline int fetch_store_strlen(unsigned long addr);
static nokprobe_inline int
fetch_store_string(unsigned long addr, void *dest, void *base);
static nokprobe_inline int fetch_store_strlen_user(unsigned long addr);
static nokprobe_inline int
fetch_store_string_user(unsigned long addr, void *dest, void *base);
static nokprobe_inline int
probe_mem_read(void *dest, void *src, size_t size);
static nokprobe_inline int
probe_mem_read_user(void *dest, void *src, size_t size);

static nokprobe_inline int
fetch_store_symstrlen(unsigned long addr)
{ … }

/*
 * Fetch a null-terminated symbol string + offset. Caller MUST set *(u32 *)buf
 * with max length and relative data location.
 */
static nokprobe_inline int
fetch_store_symstring(unsigned long addr, void *dest, void *base)
{ … }

/* common part of process_fetch_insn*/
static nokprobe_inline int
process_common_fetch_insn(struct fetch_insn *code, unsigned long *val)
{ … }

/* From the 2nd stage, routine is same */
static nokprobe_inline int
process_fetch_insn_bottom(struct fetch_insn *code, unsigned long val,
			   void *dest, void *base)
{ … }

/* Sum up total data length for dynamic arrays (strings) */
static nokprobe_inline int
__get_data_size(struct trace_probe *tp, struct pt_regs *regs, void *edata)
{ … }

/* Store the value of each argument */
static nokprobe_inline void
store_trace_args(void *data, struct trace_probe *tp, void *rec, void *edata,
		 int header_size, int maxlen)
{ … }