From: Masami Hiramatsu <mhiramat@kernel.org> To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org> Cc: x86@kernel.org, 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>, Laura Abbott <labbott@redhat.com>, Josef Bacik <jbacik@fb.com>, Alexei Starovoitov <ast@kernel.org>, Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>, Vineet Gupta <vgupta@synopsys.com>, Russell King <linux@armlinux.org.uk>, Arnd Bergmann <arnd@arndb.de>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Tony Luck <tony.luck@intel.com>, Fenghua Yu <fenghua.yu@intel.com>, Ralf Baechle <ralf@linux-mips.org>, James Hogan <jhogan@kernel.org>, Martin Schwidefsky <schwidefsky@de.ibm.com>, Heiko Carstens <heiko.carstens@de.ibm.com>, Yoshinori Sato <ysato@users.sourceforge.jp>, Rich Felker <dalias@libc.org>, "David S . Miller" <davem@davemloft.net>, linux-arch@vger.kernel.org Subject: [PATCH -tip v4 02/27] kprobes: Remove jprobe API implementation Date: Mon, 28 May 2018 16:00:13 +0900 [thread overview] Message-ID: <152749081351.15132.10476552425076318218.stgit@devbox> (raw) In-Reply-To: <152749074878.15132.16693721906742461289.stgit@devbox> Remove jprobe API implementations and test cases for those APIs which is no more used. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> --- Changes in v4: - Cleanup lib/Kconfig.debug description too. Changes in v3: - Remove test cases. --- include/linux/kprobes.h | 3 -- kernel/kprobes.c | 78 +-------------------------------------- kernel/test_kprobes.c | 94 ----------------------------------------------- lib/Kconfig.debug | 2 + 4 files changed, 2 insertions(+), 175 deletions(-) diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h index 9440a2fc8893..b520baa65682 100644 --- a/include/linux/kprobes.h +++ b/include/linux/kprobes.h @@ -389,9 +389,6 @@ int register_kprobe(struct kprobe *p); void unregister_kprobe(struct kprobe *p); int register_kprobes(struct kprobe **kps, int num); void unregister_kprobes(struct kprobe **kps, int num); -int setjmp_pre_handler(struct kprobe *, struct pt_regs *); -int longjmp_break_handler(struct kprobe *, struct pt_regs *); -void jprobe_return(void); unsigned long arch_deref_entry_point(void *); int register_kretprobe(struct kretprobe *rp); diff --git a/kernel/kprobes.c b/kernel/kprobes.c index ea619021d901..69de130595f7 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -1272,7 +1272,7 @@ NOKPROBE_SYMBOL(cleanup_rp_inst); /* * Add the new probe to ap->list. Fail if this is the -* second jprobe at the address - two jprobes can't coexist +* second break_handler at the address */ static int add_new_kprobe(struct kprobe *ap, struct kprobe *p) { @@ -1812,77 +1812,6 @@ unsigned long __weak arch_deref_entry_point(void *entry) return (unsigned long)entry; } -#if 0 -int register_jprobes(struct jprobe **jps, int num) -{ - int ret = 0, i; - - if (num <= 0) - return -EINVAL; - - for (i = 0; i < num; i++) { - ret = register_jprobe(jps[i]); - - if (ret < 0) { - if (i > 0) - unregister_jprobes(jps, i); - break; - } - } - - return ret; -} -EXPORT_SYMBOL_GPL(register_jprobes); - -int register_jprobe(struct jprobe *jp) -{ - unsigned long addr, offset; - struct kprobe *kp = &jp->kp; - - /* - * Verify probepoint as well as the jprobe handler are - * valid function entry points. - */ - addr = arch_deref_entry_point(jp->entry); - - if (kallsyms_lookup_size_offset(addr, NULL, &offset) && offset == 0 && - kprobe_on_func_entry(kp->addr, kp->symbol_name, kp->offset)) { - kp->pre_handler = setjmp_pre_handler; - kp->break_handler = longjmp_break_handler; - return register_kprobe(kp); - } - - return -EINVAL; -} -EXPORT_SYMBOL_GPL(register_jprobe); - -void unregister_jprobe(struct jprobe *jp) -{ - unregister_jprobes(&jp, 1); -} -EXPORT_SYMBOL_GPL(unregister_jprobe); - -void unregister_jprobes(struct jprobe **jps, int num) -{ - int i; - - if (num <= 0) - return; - mutex_lock(&kprobe_mutex); - for (i = 0; i < num; i++) - if (__unregister_kprobe_top(&jps[i]->kp) < 0) - jps[i]->kp.addr = NULL; - mutex_unlock(&kprobe_mutex); - - synchronize_sched(); - for (i = 0; i < num; i++) { - if (jps[i]->kp.addr) - __unregister_kprobe_bottom(&jps[i]->kp); - } -} -EXPORT_SYMBOL_GPL(unregister_jprobes); -#endif - #ifdef CONFIG_KRETPROBES /* * This kprobe pre_handler is registered with every kretprobe. When probe @@ -2329,8 +2258,6 @@ static void report_probe(struct seq_file *pi, struct kprobe *p, if (p->pre_handler == pre_handler_kretprobe) kprobe_type = "r"; - else if (p->pre_handler == setjmp_pre_handler) - kprobe_type = "j"; else kprobe_type = "k"; @@ -2637,6 +2564,3 @@ late_initcall(debugfs_kprobe_init); #endif /* CONFIG_DEBUG_FS */ module_init(init_kprobes); - -/* defined in arch/.../kernel/kprobes.c */ -EXPORT_SYMBOL_GPL(jprobe_return); diff --git a/kernel/test_kprobes.c b/kernel/test_kprobes.c index dd53e354f630..7bca480151b0 100644 --- a/kernel/test_kprobes.c +++ b/kernel/test_kprobes.c @@ -162,90 +162,6 @@ static int test_kprobes(void) } -#if 0 -static u32 jph_val; - -static u32 j_kprobe_target(u32 value) -{ - if (preemptible()) { - handler_errors++; - pr_err("jprobe-handler is preemptible\n"); - } - if (value != rand1) { - handler_errors++; - pr_err("incorrect value in jprobe handler\n"); - } - - jph_val = rand1; - jprobe_return(); - return 0; -} - -static struct jprobe jp = { - .entry = j_kprobe_target, - .kp.symbol_name = "kprobe_target" -}; - -static int test_jprobe(void) -{ - int ret; - - ret = register_jprobe(&jp); - if (ret < 0) { - pr_err("register_jprobe returned %d\n", ret); - return ret; - } - - ret = target(rand1); - unregister_jprobe(&jp); - if (jph_val == 0) { - pr_err("jprobe handler not called\n"); - handler_errors++; - } - - return 0; -} - -static struct jprobe jp2 = { - .entry = j_kprobe_target, - .kp.symbol_name = "kprobe_target2" -}; - -static int test_jprobes(void) -{ - int ret; - struct jprobe *jps[2] = {&jp, &jp2}; - - /* addr and flags should be cleard for reusing kprobe. */ - jp.kp.addr = NULL; - jp.kp.flags = 0; - ret = register_jprobes(jps, 2); - if (ret < 0) { - pr_err("register_jprobes returned %d\n", ret); - return ret; - } - - jph_val = 0; - ret = target(rand1); - if (jph_val == 0) { - pr_err("jprobe handler not called\n"); - handler_errors++; - } - - jph_val = 0; - ret = target2(rand1); - if (jph_val == 0) { - pr_err("jprobe handler2 not called\n"); - handler_errors++; - } - unregister_jprobes(jps, 2); - - return 0; -} -#else -#define test_jprobe() (0) -#define test_jprobes() (0) -#endif #ifdef CONFIG_KRETPROBES static u32 krph_val; @@ -383,16 +299,6 @@ int init_test_probes(void) if (ret < 0) errors++; - num_tests++; - ret = test_jprobe(); - if (ret < 0) - errors++; - - num_tests++; - ret = test_jprobes(); - if (ret < 0) - errors++; - #ifdef CONFIG_KRETPROBES num_tests++; ret = test_kretprobe(); diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c40c7b734cd1..02c289e29e6d 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1698,7 +1698,7 @@ config KPROBES_SANITY_TEST default n help This option provides for testing basic kprobes functionality on - boot. A sample kprobe, jprobe and kretprobe are inserted and + boot. Samples of kprobe and kretprobe are inserted and verified for functionality. Say N if you are unsure.
WARNING: multiple messages have this Message-ID (diff)
From: Masami Hiramatsu <mhiramat@kernel.org> To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org> Cc: x86@kernel.org, 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>, Laura Abbott <labbott@redhat.com>, Josef Bacik <jbacik@fb.com>, Alexei Starovoitov <ast@kernel.org>, Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>, Vineet Gupta <vgupta@synopsys.com>, Russell King <linux@armlinux.org.uk>, Arnd Bergmann <arnd@arndb.de>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Tony Luck <tony.luck@intel.com>, Fenghua Yu <fenghua.yu@intel.com>, Ralf Baechle <ralf@linux-mips.org>, James Hogan <jhogan@kernel.org> Subject: [PATCH -tip v4 02/27] kprobes: Remove jprobe API implementation Date: Mon, 28 May 2018 16:00:13 +0900 [thread overview] Message-ID: <152749081351.15132.10476552425076318218.stgit@devbox> (raw) In-Reply-To: <152749074878.15132.16693721906742461289.stgit@devbox> Remove jprobe API implementations and test cases for those APIs which is no more used. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> --- Changes in v4: - Cleanup lib/Kconfig.debug description too. Changes in v3: - Remove test cases. --- include/linux/kprobes.h | 3 -- kernel/kprobes.c | 78 +-------------------------------------- kernel/test_kprobes.c | 94 ----------------------------------------------- lib/Kconfig.debug | 2 + 4 files changed, 2 insertions(+), 175 deletions(-) diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h index 9440a2fc8893..b520baa65682 100644 --- a/include/linux/kprobes.h +++ b/include/linux/kprobes.h @@ -389,9 +389,6 @@ int register_kprobe(struct kprobe *p); void unregister_kprobe(struct kprobe *p); int register_kprobes(struct kprobe **kps, int num); void unregister_kprobes(struct kprobe **kps, int num); -int setjmp_pre_handler(struct kprobe *, struct pt_regs *); -int longjmp_break_handler(struct kprobe *, struct pt_regs *); -void jprobe_return(void); unsigned long arch_deref_entry_point(void *); int register_kretprobe(struct kretprobe *rp); diff --git a/kernel/kprobes.c b/kernel/kprobes.c index ea619021d901..69de130595f7 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -1272,7 +1272,7 @@ NOKPROBE_SYMBOL(cleanup_rp_inst); /* * Add the new probe to ap->list. Fail if this is the -* second jprobe at the address - two jprobes can't coexist +* second break_handler at the address */ static int add_new_kprobe(struct kprobe *ap, struct kprobe *p) { @@ -1812,77 +1812,6 @@ unsigned long __weak arch_deref_entry_point(void *entry) return (unsigned long)entry; } -#if 0 -int register_jprobes(struct jprobe **jps, int num) -{ - int ret = 0, i; - - if (num <= 0) - return -EINVAL; - - for (i = 0; i < num; i++) { - ret = register_jprobe(jps[i]); - - if (ret < 0) { - if (i > 0) - unregister_jprobes(jps, i); - break; - } - } - - return ret; -} -EXPORT_SYMBOL_GPL(register_jprobes); - -int register_jprobe(struct jprobe *jp) -{ - unsigned long addr, offset; - struct kprobe *kp = &jp->kp; - - /* - * Verify probepoint as well as the jprobe handler are - * valid function entry points. - */ - addr = arch_deref_entry_point(jp->entry); - - if (kallsyms_lookup_size_offset(addr, NULL, &offset) && offset == 0 && - kprobe_on_func_entry(kp->addr, kp->symbol_name, kp->offset)) { - kp->pre_handler = setjmp_pre_handler; - kp->break_handler = longjmp_break_handler; - return register_kprobe(kp); - } - - return -EINVAL; -} -EXPORT_SYMBOL_GPL(register_jprobe); - -void unregister_jprobe(struct jprobe *jp) -{ - unregister_jprobes(&jp, 1); -} -EXPORT_SYMBOL_GPL(unregister_jprobe); - -void unregister_jprobes(struct jprobe **jps, int num) -{ - int i; - - if (num <= 0) - return; - mutex_lock(&kprobe_mutex); - for (i = 0; i < num; i++) - if (__unregister_kprobe_top(&jps[i]->kp) < 0) - jps[i]->kp.addr = NULL; - mutex_unlock(&kprobe_mutex); - - synchronize_sched(); - for (i = 0; i < num; i++) { - if (jps[i]->kp.addr) - __unregister_kprobe_bottom(&jps[i]->kp); - } -} -EXPORT_SYMBOL_GPL(unregister_jprobes); -#endif - #ifdef CONFIG_KRETPROBES /* * This kprobe pre_handler is registered with every kretprobe. When probe @@ -2329,8 +2258,6 @@ static void report_probe(struct seq_file *pi, struct kprobe *p, if (p->pre_handler == pre_handler_kretprobe) kprobe_type = "r"; - else if (p->pre_handler == setjmp_pre_handler) - kprobe_type = "j"; else kprobe_type = "k"; @@ -2637,6 +2564,3 @@ late_initcall(debugfs_kprobe_init); #endif /* CONFIG_DEBUG_FS */ module_init(init_kprobes); - -/* defined in arch/.../kernel/kprobes.c */ -EXPORT_SYMBOL_GPL(jprobe_return); diff --git a/kernel/test_kprobes.c b/kernel/test_kprobes.c index dd53e354f630..7bca480151b0 100644 --- a/kernel/test_kprobes.c +++ b/kernel/test_kprobes.c @@ -162,90 +162,6 @@ static int test_kprobes(void) } -#if 0 -static u32 jph_val; - -static u32 j_kprobe_target(u32 value) -{ - if (preemptible()) { - handler_errors++; - pr_err("jprobe-handler is preemptible\n"); - } - if (value != rand1) { - handler_errors++; - pr_err("incorrect value in jprobe handler\n"); - } - - jph_val = rand1; - jprobe_return(); - return 0; -} - -static struct jprobe jp = { - .entry = j_kprobe_target, - .kp.symbol_name = "kprobe_target" -}; - -static int test_jprobe(void) -{ - int ret; - - ret = register_jprobe(&jp); - if (ret < 0) { - pr_err("register_jprobe returned %d\n", ret); - return ret; - } - - ret = target(rand1); - unregister_jprobe(&jp); - if (jph_val == 0) { - pr_err("jprobe handler not called\n"); - handler_errors++; - } - - return 0; -} - -static struct jprobe jp2 = { - .entry = j_kprobe_target, - .kp.symbol_name = "kprobe_target2" -}; - -static int test_jprobes(void) -{ - int ret; - struct jprobe *jps[2] = {&jp, &jp2}; - - /* addr and flags should be cleard for reusing kprobe. */ - jp.kp.addr = NULL; - jp.kp.flags = 0; - ret = register_jprobes(jps, 2); - if (ret < 0) { - pr_err("register_jprobes returned %d\n", ret); - return ret; - } - - jph_val = 0; - ret = target(rand1); - if (jph_val == 0) { - pr_err("jprobe handler not called\n"); - handler_errors++; - } - - jph_val = 0; - ret = target2(rand1); - if (jph_val == 0) { - pr_err("jprobe handler2 not called\n"); - handler_errors++; - } - unregister_jprobes(jps, 2); - - return 0; -} -#else -#define test_jprobe() (0) -#define test_jprobes() (0) -#endif #ifdef CONFIG_KRETPROBES static u32 krph_val; @@ -383,16 +299,6 @@ int init_test_probes(void) if (ret < 0) errors++; - num_tests++; - ret = test_jprobe(); - if (ret < 0) - errors++; - - num_tests++; - ret = test_jprobes(); - if (ret < 0) - errors++; - #ifdef CONFIG_KRETPROBES num_tests++; ret = test_kretprobe(); diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c40c7b734cd1..02c289e29e6d 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1698,7 +1698,7 @@ config KPROBES_SANITY_TEST default n help This option provides for testing basic kprobes functionality on - boot. A sample kprobe, jprobe and kretprobe are inserted and + boot. Samples of kprobe and kretprobe are inserted and verified for functionality. Say N if you are unsure.
next prev parent reply other threads:[~2018-05-28 7:00 UTC|newest] Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-05-28 6:59 [PATCH -tip v4 00/27] kprobes: Cleanup jprobe implementation Masami Hiramatsu 2018-05-28 6:59 ` Masami Hiramatsu 2018-05-28 6:59 ` [PATCH -tip v4 01/27] Documentation/kprobes: Fix to remove remaining jprobe Masami Hiramatsu 2018-05-28 6:59 ` Masami Hiramatsu 2018-05-28 7:00 ` Masami Hiramatsu [this message] 2018-05-28 7:00 ` [PATCH -tip v4 02/27] kprobes: Remove jprobe API implementation Masami Hiramatsu 2018-05-28 7:00 ` [PATCH -tip v4 03/27] kprobes/x86: Remove jprobe implementation Masami Hiramatsu 2018-05-28 7:00 ` Masami Hiramatsu 2018-05-28 7:01 ` [PATCH -tip v4 04/27] ARC: kprobes: " Masami Hiramatsu 2018-05-28 7:01 ` Masami Hiramatsu 2018-05-28 7:01 ` [PATCH -tip v4 05/27] ARM: kprobes: Remove jprobe arm implementation Masami Hiramatsu 2018-05-28 7:01 ` Masami Hiramatsu 2018-05-28 7:02 ` [PATCH -tip v4 06/27] arm64: kprobes: Remove jprobe implementation Masami Hiramatsu 2018-05-28 7:02 ` Masami Hiramatsu 2018-05-28 7:02 ` [PATCH -tip v4 07/27] powerpc/kprobes: Remove jprobe powerpc implementation Masami Hiramatsu 2018-05-28 7:02 ` Masami Hiramatsu 2018-05-28 7:03 ` [PATCH -tip v4 08/27] ia64: kprobes: Remove jprobe implementation Masami Hiramatsu 2018-05-28 7:03 ` Masami Hiramatsu 2018-05-28 7:03 ` [PATCH -tip v4 09/27] MIPS: " Masami Hiramatsu 2018-05-28 7:03 ` Masami Hiramatsu 2018-05-28 7:04 ` [PATCH -tip v4 10/27] s390/kprobes: " Masami Hiramatsu 2018-05-28 7:04 ` Masami Hiramatsu 2018-05-28 7:04 ` [PATCH -tip v4 11/27] sh: kprobes: " Masami Hiramatsu 2018-05-28 7:04 ` Masami Hiramatsu 2018-05-28 7:05 ` [PATCH -tip v4 12/27] sparc64: " Masami Hiramatsu 2018-05-28 7:05 ` Masami Hiramatsu 2018-05-28 7:05 ` [PATCH -tip v4 13/27] kprobes: Don't check the ->break_handler() in generic kprobes code Masami Hiramatsu 2018-05-28 7:05 ` Masami Hiramatsu 2018-05-28 7:06 ` [PATCH -tip v4 14/27] kprobes/x86: Don't call ->break_handler() in x86 kprobes Masami Hiramatsu 2018-05-28 7:06 ` Masami Hiramatsu 2018-05-28 7:06 ` [PATCH -tip v4 15/27] ARC: kprobes: Don't call the ->break_handler() in ARC kprobes code Masami Hiramatsu 2018-05-28 7:06 ` Masami Hiramatsu 2018-05-28 7:07 ` [PATCH -tip v4 16/27] ARM: kprobes: Don't call the ->break_handler() in arm " Masami Hiramatsu 2018-05-28 7:07 ` Masami Hiramatsu 2018-05-28 7:08 ` [PATCH -tip v4 17/27] arm64: " Masami Hiramatsu 2018-05-28 7:08 ` Masami Hiramatsu 2018-05-28 7:08 ` [PATCH -tip v4 18/27] powerpc/kprobes: " Masami Hiramatsu 2018-05-28 7:08 ` Masami Hiramatsu 2018-05-28 7:09 ` [PATCH -tip v4 19/27] ia64: kprobes: Don't call the ->break_handler() in ia64 " Masami Hiramatsu 2018-05-28 7:09 ` Masami Hiramatsu 2018-05-28 7:09 ` [PATCH -tip v4 20/27] MIPS: kprobes: Don't call the ->break_handler() in MIPS " Masami Hiramatsu 2018-05-28 7:09 ` Masami Hiramatsu 2018-05-28 7:10 ` [PATCH -tip v4 21/27] s390/kprobes: Don't call the ->break_handler() in s390 " Masami Hiramatsu 2018-05-28 7:10 ` Masami Hiramatsu 2018-05-28 7:10 ` [PATCH -tip v4 22/27] sh: kprobes: Don't call the ->break_handler() in SH " Masami Hiramatsu 2018-05-28 7:10 ` Masami Hiramatsu 2018-05-28 7:11 ` [PATCH -tip v4 23/27] sparc64: kprobes: Don't call the ->break_handler() in sparc64 " Masami Hiramatsu 2018-05-28 7:11 ` Masami Hiramatsu 2018-05-28 7:11 ` [PATCH -tip v4 24/27] bpf: error-inject: kprobes: Clear current_kprobe and enable preempt in kprobe Masami Hiramatsu 2018-05-28 7:11 ` Masami Hiramatsu 2018-05-31 10:55 ` Naveen N. Rao 2018-06-01 23:36 ` Masami Hiramatsu 2018-06-02 11:58 ` Naveen N. Rao 2018-06-04 9:08 ` Masami Hiramatsu 2018-05-28 7:12 ` [PATCH -tip v4 25/27] x86: kprobes: Do not disable preempt on int3 path Masami Hiramatsu 2018-05-28 7:12 ` Masami Hiramatsu 2018-05-28 7:12 ` [PATCH -tip v4 26/27] Documentation: kprobes: Add how to change the execution path Masami Hiramatsu 2018-05-28 7:12 ` Masami Hiramatsu 2018-05-28 7:13 ` [PATCH -tip v4 27/27] kprobes: Remove jprobe stub API Masami Hiramatsu 2018-05-28 7:13 ` Masami Hiramatsu 2018-05-30 9:01 ` [PATCH -tip v4 00/27] kprobes: Cleanup jprobe implementation Masami Hiramatsu 2018-05-30 9:01 ` Masami Hiramatsu 2018-05-31 10:43 ` Naveen N. Rao 2018-05-31 10:43 ` Naveen N. Rao
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