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From: Masami Hiramatsu <mhiramat@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
	Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
	linux-kernel@vger.kernel.org,
	Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	linux-arch@vger.kernel.org,
	"David S. Miller" <davem@davemloft.net>,
	sparclinux@vger.kernel.org
Subject: [PATCH -tip v6 12/27] sparc64: kprobes: Remove jprobe implementation
Date: Wed, 20 Jun 2018 01:09:58 +0900
Message-ID: <152942459795.15209.9736720668494241853.stgit@devbox> (raw)
In-Reply-To: <152942424698.15209.15245996287444292393.stgit@devbox>

Remove arch dependent setjump/longjump functions
and unused fields in kprobe_ctlblk for jprobes
from arch/sparc.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
---
 arch/sparc/include/asm/kprobes.h |    1 -
 arch/sparc/kernel/kprobes.c      |   47 --------------------------------------
 2 files changed, 48 deletions(-)

diff --git a/arch/sparc/include/asm/kprobes.h b/arch/sparc/include/asm/kprobes.h
index 3704490b4488..bfcaa6326c20 100644
--- a/arch/sparc/include/asm/kprobes.h
+++ b/arch/sparc/include/asm/kprobes.h
@@ -44,7 +44,6 @@ struct kprobe_ctlblk {
 	unsigned long kprobe_status;
 	unsigned long kprobe_orig_tnpc;
 	unsigned long kprobe_orig_tstate_pil;
-	struct pt_regs jprobe_saved_regs;
 	struct prev_kprobe prev_kprobe;
 };
 
diff --git a/arch/sparc/kernel/kprobes.c b/arch/sparc/kernel/kprobes.c
index ab4ba4347941..f555711da8f1 100644
--- a/arch/sparc/kernel/kprobes.c
+++ b/arch/sparc/kernel/kprobes.c
@@ -441,53 +441,6 @@ asmlinkage void __kprobes kprobe_trap(unsigned long trap_level,
 	exception_exit(prev_state);
 }
 
-/* Jprobes support.  */
-int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
-{
-	struct jprobe *jp = container_of(p, struct jprobe, kp);
-	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
-
-	memcpy(&(kcb->jprobe_saved_regs), regs, sizeof(*regs));
-
-	regs->tpc  = (unsigned long) jp->entry;
-	regs->tnpc = ((unsigned long) jp->entry) + 0x4UL;
-	regs->tstate |= TSTATE_PIL;
-
-	return 1;
-}
-
-void __kprobes jprobe_return(void)
-{
-	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
-	register unsigned long orig_fp asm("g1");
-
-	orig_fp = kcb->jprobe_saved_regs.u_regs[UREG_FP];
-	__asm__ __volatile__("\n"
-"1:	cmp		%%sp, %0\n\t"
-	"blu,a,pt	%%xcc, 1b\n\t"
-	" restore\n\t"
-	".globl		jprobe_return_trap_instruction\n"
-"jprobe_return_trap_instruction:\n\t"
-	"ta		0x70"
-	: /* no outputs */
-	: "r" (orig_fp));
-}
-
-extern void jprobe_return_trap_instruction(void);
-
-int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
-{
-	u32 *addr = (u32 *) regs->tpc;
-	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
-
-	if (addr == (u32 *) jprobe_return_trap_instruction) {
-		memcpy(regs, &(kcb->jprobe_saved_regs), sizeof(*regs));
-		preempt_enable_no_resched();
-		return 1;
-	}
-	return 0;
-}
-
 /* The value stored in the return address register is actually 2
  * instructions before where the callee will return to.
  * Sequences usually look something like this


  parent reply index

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-19 16:04 [PATCH -tip v6 00/27] kprobes: Cleanup " Masami Hiramatsu
2018-06-19 16:04 ` [PATCH -tip v6 01/27] Documentation/kprobes: Fix to remove remaining jprobe Masami Hiramatsu
2018-06-19 16:05 ` [PATCH -tip v6 02/27] kprobes: Remove jprobe API implementation Masami Hiramatsu
2018-06-19 16:05 ` [PATCH -tip v6 03/27] kprobes/x86: Remove jprobe implementation Masami Hiramatsu
2018-06-19 16:06 ` [PATCH -tip v6 04/27] ARC: kprobes: " Masami Hiramatsu
2018-06-19 16:06 ` [PATCH -tip v6 05/27] ARM: kprobes: Remove jprobe arm implementation Masami Hiramatsu
2018-06-19 16:07 ` [PATCH -tip v6 06/27] arm64: kprobes: Remove jprobe implementation Masami Hiramatsu
2018-06-19 16:07 ` [PATCH -tip v6 07/27] powerpc/kprobes: Remove jprobe powerpc implementation Masami Hiramatsu
2018-06-19 16:08 ` [PATCH -tip v6 08/27] ia64: kprobes: Remove jprobe implementation Masami Hiramatsu
2018-06-19 16:08 ` [PATCH -tip v6 09/27] MIPS: " Masami Hiramatsu
2018-06-19 16:08 ` [PATCH -tip v6 10/27] s390/kprobes: " Masami Hiramatsu
2018-06-19 16:09 ` [PATCH -tip v6 11/27] sh: kprobes: " Masami Hiramatsu
2018-06-19 16:09 ` Masami Hiramatsu [this message]
2018-06-19 16:10 ` [PATCH -tip v6 13/27] kprobes: Don't check the ->break_handler() in generic kprobes code Masami Hiramatsu
2018-06-19 16:10 ` [PATCH -tip v6 14/27] kprobes/x86: Don't call ->break_handler() in x86 kprobes Masami Hiramatsu
2018-06-19 16:11 ` [PATCH -tip v6 15/27] ARC: kprobes: Don't call the ->break_handler() in ARC kprobes code Masami Hiramatsu
2018-06-19 16:11 ` [PATCH -tip v6 16/27] ARM: kprobes: Don't call the ->break_handler() in arm " Masami Hiramatsu
2018-06-19 16:12 ` [PATCH -tip v6 17/27] arm64: kprobes: Don't call the ->break_handler() in arm64 " Masami Hiramatsu
2018-06-19 16:12 ` [PATCH -tip v6 18/27] powerpc/kprobes: Don't call the ->break_handler() in powerpc " Masami Hiramatsu
2018-06-19 16:13 ` [PATCH -tip v6 19/27] ia64: kprobes: Don't call the ->break_handler() in ia64 " Masami Hiramatsu
2018-06-19 16:13 ` [PATCH -tip v6 20/27] MIPS: kprobes: Don't call the ->break_handler() in MIPS " Masami Hiramatsu
2018-06-19 16:14 ` [PATCH -tip v6 21/27] s390/kprobes: Don't call the ->break_handler() in s390 " Masami Hiramatsu
2018-06-19 16:14 ` [PATCH -tip v6 22/27] sh: kprobes: Don't call the ->break_handler() in SH " Masami Hiramatsu
2018-06-19 16:15 ` [PATCH -tip v6 23/27] sparc64: kprobes: Don't call the ->break_handler() in sparc64 " Masami Hiramatsu
2018-06-19 16:15 ` [PATCH -tip v6 24/27] bpf: error-inject: kprobes: Clear current_kprobe and enable preempt in kprobe Masami Hiramatsu
2018-06-19 16:16 ` [PATCH -tip v6 25/27] kprobes/x86: Do not disable preempt on int3 path Masami Hiramatsu
2018-06-19 16:16 ` [PATCH -tip v6 26/27] Documentation: kprobes: Add how to change the execution path Masami Hiramatsu
2018-06-19 16:31   ` Randy Dunlap
2018-06-20  8:26     ` Masami Hiramatsu
2018-06-21 10:35       ` Ingo Molnar
2018-06-22  6:07         ` Masami Hiramatsu
2018-06-22  9:15           ` [tip:perf/core] kprobes/Documentation: Fix various typos tip-bot for Masami Hiramatsu
2018-06-19 16:17 ` [PATCH -tip v6 27/27] kprobes: Remove jprobe stub API Masami Hiramatsu

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