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Commit d580cd96 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: ftrace: Fix up syscall tracing build. 



Syscall tracing metadata was shuffled around, update accordingly.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent b5c00a3a

arch/sh/kernel/ftrace.c

+2 −74
Original line number Diff line number Diff line
@@ -401,82 +401,10 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) 
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */



#ifdef CONFIG_FTRACE_SYSCALLS



extern unsigned long __start_syscalls_metadata[];

extern unsigned long __stop_syscalls_metadata[];

extern unsigned long *sys_call_table;



static struct syscall_metadata **syscalls_metadata;



static struct syscall_metadata *find_syscall_meta(unsigned long *syscall)

{

	struct syscall_metadata *start;

	struct syscall_metadata *stop;

	char str[KSYM_SYMBOL_LEN];





	start = (struct syscall_metadata *)__start_syscalls_metadata;

	stop = (struct syscall_metadata *)__stop_syscalls_metadata;

	kallsyms_lookup((unsigned long) syscall, NULL, NULL, NULL, str);



	for ( ; start < stop; start++) {

		if (start->name && !strcmp(start->name, str))

			return start;

	}



	return NULL;

}



struct syscall_metadata *syscall_nr_to_meta(int nr)

{

	if (!syscalls_metadata || nr >= FTRACE_SYSCALL_MAX || nr < 0)

		return NULL;



	return syscalls_metadata[nr];

}



int syscall_name_to_nr(char *name)

{

	int i;



	if (!syscalls_metadata)

		return -1;

	for (i = 0; i < NR_syscalls; i++)

		if (syscalls_metadata[i])

			if (!strcmp(syscalls_metadata[i]->name, name))

				return i;

	return -1;

}



void set_syscall_enter_id(int num, int id)

{

	syscalls_metadata[num]->enter_id = id;

}



void set_syscall_exit_id(int num, int id)

{

	syscalls_metadata[num]->exit_id = id;

}



static int __init arch_init_ftrace_syscalls(void)

unsigned long __init arch_syscall_addr(int nr)

{

	int i;

	struct syscall_metadata *meta;

	unsigned long **psys_syscall_table = &sys_call_table;



	syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) *

					FTRACE_SYSCALL_MAX, GFP_KERNEL);

	if (!syscalls_metadata) {

		WARN_ON(1);

		return -ENOMEM;

	}



	for (i = 0; i < FTRACE_SYSCALL_MAX; i++) {

		meta = find_syscall_meta(psys_syscall_table[i]);

		syscalls_metadata[i] = meta;

	}



	return 0;

	return (unsigned long)sys_call_table[nr];

}

arch_initcall(arch_init_ftrace_syscalls);

#endif /* CONFIG_FTRACE_SYSCALLS */