diff options
Diffstat (limited to 'arch/x86/kernel/ftrace_32.S')
| -rw-r--r-- | arch/x86/kernel/ftrace_32.S | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/arch/x86/kernel/ftrace_32.S b/arch/x86/kernel/ftrace_32.S index a0ed0e4a2c0c..f4e0c3361234 100644 --- a/arch/x86/kernel/ftrace_32.S +++ b/arch/x86/kernel/ftrace_32.S @@ -3,10 +3,10 @@ * Copyright (C) 2017 Steven Rostedt, VMware Inc. */ +#include <linux/export.h> #include <linux/linkage.h> #include <asm/page_types.h> #include <asm/segment.h> -#include <asm/export.h> #include <asm/ftrace.h> #include <asm/nospec-branch.h> #include <asm/frame.h> @@ -163,6 +163,11 @@ SYM_INNER_LABEL(ftrace_regs_call, SYM_L_GLOBAL) jmp .Lftrace_ret SYM_CODE_END(ftrace_regs_caller) +SYM_FUNC_START(ftrace_stub_direct_tramp) + CALL_DEPTH_ACCOUNT + RET +SYM_FUNC_END(ftrace_stub_direct_tramp) + #ifdef CONFIG_FUNCTION_GRAPH_TRACER SYM_CODE_START(ftrace_graph_caller) pushl %eax @@ -182,12 +187,15 @@ SYM_CODE_END(ftrace_graph_caller) .globl return_to_handler return_to_handler: - pushl %eax - pushl %edx - movl $0, %eax + subl $(PTREGS_SIZE), %esp + movl $0, PT_EBP(%esp) + movl %edx, PT_EDX(%esp) + movl %eax, PT_EAX(%esp) + movl %esp, %eax call ftrace_return_to_handler movl %eax, %ecx - popl %edx - popl %eax + movl PT_EAX(%esp), %eax + movl PT_EDX(%esp), %edx + addl $(PTREGS_SIZE), %esp JMP_NOSPEC ecx #endif |