ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 04:33:26 +02:00
Code Issues Packages Projects Releases Wiki Activity

fprobe: Pass return address to the handlers

Browse Source 
Pass return address as 'ret_ip' to the fprobe entry and return handlers
so that the fprobe user handler can get the reutrn address without
analyzing arch-dependent pt_regs.

Link: https://lore.kernel.org/all/168507467664.913472.11642316698862778600.stgit@mhiramat.roam.corp.google.com/

Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
This commit is contained in:
Masami Hiramatsu (Google)
2023-06-06 21:39:55 +09:00
parent 9561de3a55
commit cb16330d12
8 changed files with 26 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
samples/fprobe/fprobe_example.c
View File

@@ -49,6 +49,7 @@ static void show_backtrace(void)
}
static int sample_entry_handler(struct fprobe *fp, unsigned long ip,
unsigned long ret_ip,
struct pt_regs *regs, void *data)
{
if (use_trace)
@@ -65,10 +66,11 @@ static int sample_entry_handler(struct fprobe *fp, unsigned long ip,
return 0;
}
static void sample_exit_handler(struct fprobe *fp, unsigned long ip, struct pt_regs *regs,
static void sample_exit_handler(struct fprobe *fp, unsigned long ip,
unsigned long ret_ip, struct pt_regs *regs,
void *data)
{
unsigned long rip = instruction_pointer(regs);
unsigned long rip = ret_ip;
if (use_trace)
/*