#ifdef CONFIG_UNUSED_SYMBOLS
/*
* 获取__ksymtab_unused段的运行时地址，及其存储的
* 对象的个数。
*/
mod->unused_syms = section_objs(hdr, sechdrs, secstrings,
"__ksymtab_unused",
sizeof(*mod->unused_syms),
&mod->num_unused_syms);
/*
* 获取__kcrctab_unused段的运行时地址。
*/
mod->unused_crcs = section_addr(hdr, sechdrs, secstrings,
"__kcrctab_unused");
/*
* 获取__ksymtab_unused_gpl段的运行时地址，及其存储的
* 对象的个数。
*/
mod->unused_gpl_syms = section_objs(hdr, sechdrs, secstrings,
"__ksymtab_unused_gpl",
sizeof(*mod->unused_gpl_syms),
&mod->num_unused_gpl_syms);
/*
* 获取__kcrctab_unused_gpl段的运行时地址。
*/
mod->unused_gpl_crcs = section_addr(hdr, sechdrs, secstrings,
"__kcrctab_unused_gpl");
#endif
#ifdef CONFIG_CONSTRUCTORS
/*
* 获取.ctors段的运行时地址，及其存储的
* 对象的个数。
*/
mod->ctors = section_objs(hdr, sechdrs, secstrings, ".ctors",
sizeof(*mod->ctors), &mod->num_ctors);
#endif
#ifdef CONFIG_TRACEPOINTS
/*
* 获取__tracepoints段的运行时地址，及其存储的
* 对象的个数。
*/
mod->tracepoints = section_objs(hdr, sechdrs, secstrings,
"__tracepoints",
sizeof(*mod->tracepoints),
&mod->num_tracepoints);
#endif
#ifdef CONFIG_EVENT_TRACING
/*
* 获取_ftrace_events段的运行时地址，及其存储的
* 对象的个数。
*/
mod->trace_events = section_objs(hdr, sechdrs, secstrings,
"_ftrace_events",
sizeof(*mod->trace_events),
&mod->num_trace_events);
#endif
#ifdef CONFIG_FTRACE_MCOUNT_RECORD
/* sechdrs[0].sh_size is always zero */
/*
* 获取__mcount_loc段的运行时地址，及其存储的
* 对象的个数。
*/
mod->ftrace_callsites = section_objs(hdr, sechdrs, secstrings,
"__mcount_loc",
sizeof(*mod->ftrace_callsites),
&mod->num_ftrace_callsites);
#endif
#ifdef CONFIG_MODVERSIONS
if ((mod->num_syms && !mod->crcs)
|| (mod->num_gpl_syms && !mod->gpl_crcs)
|| (mod->num_gpl_future_syms && !mod->gpl_future_crcs)
#ifdef CONFIG_UNUSED_SYMBOLS
|| (mod->num_unused_syms && !mod->unused_crcs)
|| (mod->num_unused_gpl_syms && !mod->unused_gpl_crcs)
#endif
) {
err = try_to_force_load(mod,
"no versions for exported symbols");
if (err)
goto cleanup;
}
#endif
/* Now do relocations. */
for (i = 1; i < hdr->e_shnum; i++) {
const char *strtab = (char *)sechdrs[strindex].sh_addr;
unsigned int info = sechdrs[i].sh_info;