lkml.org 
[lkml]   [2020]   [Mar]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [RFC][PATCH] objtool,ftrace: Implement UNWIND_HINT_RET_OFFSET
On Tue, Mar 31, 2020 at 11:31:36AM -0400, Steven Rostedt wrote:

> Can you send this change as a separate patch as it has nothing to do with
> this current change, and is a clean up patch that stands on its own.

I also found this.. should I write it up?

---
diff --git a/arch/x86/kernel/ftrace_64.S b/arch/x86/kernel/ftrace_64.S
index 369e61faacfe..0f108096f278 100644
--- a/arch/x86/kernel/ftrace_64.S
+++ b/arch/x86/kernel/ftrace_64.S
@@ -23,7 +23,7 @@
#endif /* CONFIG_FRAME_POINTER */

/* Size of stack used to save mcount regs in save_mcount_regs */
-#define MCOUNT_REG_SIZE (SS+8 + MCOUNT_FRAME_SIZE)
+#define MCOUNT_REG_SIZE (SIZEOF_PTREGS + MCOUNT_FRAME_SIZE)

/*
* gcc -pg option adds a call to 'mcount' in most functions.
@@ -77,7 +77,7 @@
/*
* We add enough stack to save all regs.
*/
- subq $(MCOUNT_REG_SIZE - MCOUNT_FRAME_SIZE), %rsp
+ subq $(SIZEOF_PTREGS), %rsp
movq %rax, RAX(%rsp)
movq %rcx, RCX(%rsp)
movq %rdx, RDX(%rsp)
\
 
 \ /
  Last update: 2020-03-31 21:59    [W:0.140 / U:1.972 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site