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-rw-r--r--arch/blackfin/kernel/ftrace.c125
1 files changed, 0 insertions, 125 deletions
diff --git a/arch/blackfin/kernel/ftrace.c b/arch/blackfin/kernel/ftrace.c
deleted file mode 100644
index 8dad7589b843..000000000000
--- a/arch/blackfin/kernel/ftrace.c
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- * ftrace graph code
- *
- * Copyright (C) 2009-2010 Analog Devices Inc.
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/ftrace.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/uaccess.h>
-#include <linux/atomic.h>
-#include <asm/cacheflush.h>
-
-#ifdef CONFIG_DYNAMIC_FTRACE
-
-static const unsigned char mnop[] = {
- 0x03, 0xc0, 0x00, 0x18, /* MNOP; */
- 0x03, 0xc0, 0x00, 0x18, /* MNOP; */
-};
-
-static void bfin_make_pcrel24(unsigned char *insn, unsigned long src,
- unsigned long dst)
-{
- uint32_t pcrel = (dst - src) >> 1;
- insn[0] = pcrel >> 16;
- insn[1] = 0xe3;
- insn[2] = pcrel;
- insn[3] = pcrel >> 8;
-}
-#define bfin_make_pcrel24(insn, src, dst) bfin_make_pcrel24(insn, src, (unsigned long)(dst))
-
-static int ftrace_modify_code(unsigned long ip, const unsigned char *code,
- unsigned long len)
-{
- int ret = probe_kernel_write((void *)ip, (void *)code, len);
- flush_icache_range(ip, ip + len);
- return ret;
-}
-
-int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
- unsigned long addr)
-{
- /* Turn the mcount call site into two MNOPs as those are 32bit insns */
- return ftrace_modify_code(rec->ip, mnop, sizeof(mnop));
-}
-
-int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
-{
- /* Restore the mcount call site */
- unsigned char call[8];
- call[0] = 0x67; /* [--SP] = RETS; */
- call[1] = 0x01;
- bfin_make_pcrel24(&call[2], rec->ip + 2, addr);
- call[6] = 0x27; /* RETS = [SP++]; */
- call[7] = 0x01;
- return ftrace_modify_code(rec->ip, call, sizeof(call));
-}
-
-int ftrace_update_ftrace_func(ftrace_func_t func)
-{
- unsigned char call[4];
- unsigned long ip = (unsigned long)&ftrace_call;
- bfin_make_pcrel24(call, ip, func);
- return ftrace_modify_code(ip, call, sizeof(call));
-}
-
-int __init ftrace_dyn_arch_init(void)
-{
- return 0;
-}
-
-#endif
-
-#ifdef CONFIG_FUNCTION_GRAPH_TRACER
-
-# ifdef CONFIG_DYNAMIC_FTRACE
-
-extern void ftrace_graph_call(void);
-
-int ftrace_enable_ftrace_graph_caller(void)
-{
- unsigned long ip = (unsigned long)&ftrace_graph_call;
- uint16_t jump_pcrel12 = ((unsigned long)&ftrace_graph_caller - ip) >> 1;
- jump_pcrel12 |= 0x2000;
- return ftrace_modify_code(ip, (void *)&jump_pcrel12, sizeof(jump_pcrel12));
-}
-
-int ftrace_disable_ftrace_graph_caller(void)
-{
- return ftrace_modify_code((unsigned long)&ftrace_graph_call, empty_zero_page, 2);
-}
-
-# endif
-
-/*
- * Hook the return address and push it in the stack of return addrs
- * in current thread info.
- */
-void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
- unsigned long frame_pointer)
-{
- struct ftrace_graph_ent trace;
- unsigned long return_hooker = (unsigned long)&return_to_handler;
-
- if (unlikely(atomic_read(&current->tracing_graph_pause)))
- return;
-
- if (ftrace_push_return_trace(*parent, self_addr, &trace.depth,
- frame_pointer, NULL) == -EBUSY)
- return;
-
- trace.func = self_addr;
-
- /* Only trace if the calling function expects to */
- if (!ftrace_graph_entry(&trace)) {
- current->curr_ret_stack--;
- return;
- }
-
- /* all is well in the world ! hijack RETS ... */
- *parent = return_hooker;
-}
-
-#endif