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authorMasami Hiramatsu <mhiramat@kernel.org>2021-09-14 17:40:45 +0300
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2021-10-01 04:24:06 +0300
commit96fed8ac2bb64ab45497fdd8e3d390165b7a9be8 (patch)
tree41528c6cc273ae7e6a2e59301dc5e840cf484df9 /arch/ia64
parentf2ec8d9a3b8c0f22cd6a2b4f5a2d9aee5206e3b7 (diff)
downloadlinux-96fed8ac2bb64ab45497fdd8e3d390165b7a9be8.tar.xz
kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handler()
The __kretprobe_trampoline_handler() callback, called from low level arch kprobes methods, has the 'trampoline_address' parameter, which is entirely superfluous as it basically just replicates: dereference_kernel_function_descriptor(kretprobe_trampoline) In fact we had bugs in arch code where it wasn't replicated correctly. So remove this superfluous parameter and use kretprobe_trampoline_addr() instead. Link: https://lkml.kernel.org/r/163163044546.489837.13505751885476015002.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'arch/ia64')
-rw-r--r--arch/ia64/kernel/kprobes.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c
index 0f8573bbf520..44c84c20b626 100644
--- a/arch/ia64/kernel/kprobes.c
+++ b/arch/ia64/kernel/kprobes.c
@@ -392,14 +392,13 @@ static void __kprobes set_current_kprobe(struct kprobe *p,
__this_cpu_write(current_kprobe, p);
}
-static void kretprobe_trampoline(void)
+void kretprobe_trampoline(void)
{
}
int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
{
- regs->cr_iip = __kretprobe_trampoline_handler(regs,
- dereference_function_descriptor(kretprobe_trampoline), NULL);
+ regs->cr_iip = __kretprobe_trampoline_handler(regs, NULL);
/*
* By returning a non-zero value, we are telling
* kprobe_handler() that we don't want the post_handler