From: Nanyong Sun <sunnanyong@huawei.com> To: <paul.walmsley@sifive.com>, <palmer@dabbelt.com>, <aou@eecs.berkeley.edu> Cc: <linux-riscv@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <palmerdabbelt@google.com>, <atish.patra@wdc.com>, <wangkefeng.wang@huawei.com>, <sunnanyong@huawei.com> Subject: [PATCH 8/9] riscv: ftrace: Use ftrace_get_regs helper Date: Fri, 5 Mar 2021 19:33:31 +0800 [thread overview] Message-ID: <20210305113332.428048-9-sunnanyong@huawei.com> (raw) In-Reply-To: <20210305113332.428048-1-sunnanyong@huawei.com> Use ftrace_get_regs() helper call to get pt_regs from ftrace_regs struct, this makes the code simpler. Signed-off-by: Nanyong Sun <sunnanyong@huawei.com> --- arch/riscv/kernel/probes/ftrace.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/arch/riscv/kernel/probes/ftrace.c b/arch/riscv/kernel/probes/ftrace.c index e6372490aa0b..2dfb33fdac74 100644 --- a/arch/riscv/kernel/probes/ftrace.c +++ b/arch/riscv/kernel/probes/ftrace.c @@ -4,37 +4,39 @@ /* Ftrace callback handler for kprobes -- called under preepmt disabed */ void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip, - struct ftrace_ops *ops, struct ftrace_regs *regs) + struct ftrace_ops *ops, struct ftrace_regs *fregs) { struct kprobe *p; + struct pt_regs *regs; struct kprobe_ctlblk *kcb; p = get_kprobe((kprobe_opcode_t *)ip); if (unlikely(!p) || kprobe_disabled(p)) return; + regs = ftrace_get_regs(fregs); kcb = get_kprobe_ctlblk(); if (kprobe_running()) { kprobes_inc_nmissed_count(p); } else { - unsigned long orig_ip = instruction_pointer(&(regs->regs)); + unsigned long orig_ip = instruction_pointer(regs); - instruction_pointer_set(&(regs->regs), ip); + instruction_pointer_set(regs, ip); __this_cpu_write(current_kprobe, p); kcb->kprobe_status = KPROBE_HIT_ACTIVE; - if (!p->pre_handler || !p->pre_handler(p, &(regs->regs))) { + if (!p->pre_handler || !p->pre_handler(p, regs)) { /* * Emulate singlestep (and also recover regs->pc) * as if there is a nop */ - instruction_pointer_set(&(regs->regs), + instruction_pointer_set(regs, (unsigned long)p->addr + MCOUNT_INSN_SIZE); if (unlikely(p->post_handler)) { kcb->kprobe_status = KPROBE_HIT_SSDONE; - p->post_handler(p, &(regs->regs), 0); + p->post_handler(p, regs, 0); } - instruction_pointer_set(&(regs->regs), orig_ip); + instruction_pointer_set(regs, orig_ip); } /* -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Nanyong Sun <sunnanyong@huawei.com> To: <paul.walmsley@sifive.com>, <palmer@dabbelt.com>, <aou@eecs.berkeley.edu> Cc: <linux-riscv@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <palmerdabbelt@google.com>, <atish.patra@wdc.com>, <wangkefeng.wang@huawei.com>, <sunnanyong@huawei.com> Subject: [PATCH 8/9] riscv: ftrace: Use ftrace_get_regs helper Date: Fri, 5 Mar 2021 19:33:31 +0800 [thread overview] Message-ID: <20210305113332.428048-9-sunnanyong@huawei.com> (raw) In-Reply-To: <20210305113332.428048-1-sunnanyong@huawei.com> Use ftrace_get_regs() helper call to get pt_regs from ftrace_regs struct, this makes the code simpler. Signed-off-by: Nanyong Sun <sunnanyong@huawei.com> --- arch/riscv/kernel/probes/ftrace.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/arch/riscv/kernel/probes/ftrace.c b/arch/riscv/kernel/probes/ftrace.c index e6372490aa0b..2dfb33fdac74 100644 --- a/arch/riscv/kernel/probes/ftrace.c +++ b/arch/riscv/kernel/probes/ftrace.c @@ -4,37 +4,39 @@ /* Ftrace callback handler for kprobes -- called under preepmt disabed */ void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip, - struct ftrace_ops *ops, struct ftrace_regs *regs) + struct ftrace_ops *ops, struct ftrace_regs *fregs) { struct kprobe *p; + struct pt_regs *regs; struct kprobe_ctlblk *kcb; p = get_kprobe((kprobe_opcode_t *)ip); if (unlikely(!p) || kprobe_disabled(p)) return; + regs = ftrace_get_regs(fregs); kcb = get_kprobe_ctlblk(); if (kprobe_running()) { kprobes_inc_nmissed_count(p); } else { - unsigned long orig_ip = instruction_pointer(&(regs->regs)); + unsigned long orig_ip = instruction_pointer(regs); - instruction_pointer_set(&(regs->regs), ip); + instruction_pointer_set(regs, ip); __this_cpu_write(current_kprobe, p); kcb->kprobe_status = KPROBE_HIT_ACTIVE; - if (!p->pre_handler || !p->pre_handler(p, &(regs->regs))) { + if (!p->pre_handler || !p->pre_handler(p, regs)) { /* * Emulate singlestep (and also recover regs->pc) * as if there is a nop */ - instruction_pointer_set(&(regs->regs), + instruction_pointer_set(regs, (unsigned long)p->addr + MCOUNT_INSN_SIZE); if (unlikely(p->post_handler)) { kcb->kprobe_status = KPROBE_HIT_SSDONE; - p->post_handler(p, &(regs->regs), 0); + p->post_handler(p, regs, 0); } - instruction_pointer_set(&(regs->regs), orig_ip); + instruction_pointer_set(regs, orig_ip); } /* -- 2.25.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2021-03-05 11:03 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-05 11:33 [PATCH 0/9] riscv: misc cleanup Nanyong Sun 2021-03-05 11:33 ` Nanyong Sun 2021-03-05 11:33 ` [PATCH 1/9] riscv: traps: Fix no prototype warnings Nanyong Sun 2021-03-05 11:33 ` Nanyong Sun 2021-03-10 4:47 ` Palmer Dabbelt 2021-03-10 4:47 ` Palmer Dabbelt 2021-03-05 11:33 ` [PATCH 2/9] riscv: irq: Fix no prototype warning Nanyong Sun 2021-03-05 11:33 ` Nanyong Sun 2021-03-05 11:33 ` [PATCH 3/9] riscv: sbi: Fix comment of __sbi_set_timer_v01 Nanyong Sun 2021-03-05 11:33 ` Nanyong Sun 2021-03-05 11:33 ` [PATCH 4/9] riscv: ptrace: Fix no prototype warnings Nanyong Sun 2021-03-05 11:33 ` Nanyong Sun 2021-03-05 11:33 ` [PATCH 5/9] riscv: time: Fix no prototype for time_init Nanyong Sun 2021-03-05 11:33 ` Nanyong Sun 2021-03-05 11:33 ` [PATCH 6/9] riscv: syscall_table: Reduce W=1 compilation warnings noise Nanyong Sun 2021-03-05 11:33 ` Nanyong Sun 2021-03-05 11:33 ` [PATCH 7/9] riscv: process: Fix no prototype for show_regs Nanyong Sun 2021-03-05 11:33 ` Nanyong Sun 2021-03-05 11:33 ` Nanyong Sun [this message] 2021-03-05 11:33 ` [PATCH 8/9] riscv: ftrace: Use ftrace_get_regs helper Nanyong Sun 2021-03-05 11:33 ` [PATCH 9/9] riscv: process: Fix no prototype for arch_dup_task_struct Nanyong Sun 2021-03-05 11:33 ` Nanyong Sun 2021-03-10 4:47 ` [PATCH 0/9] riscv: misc cleanup Palmer Dabbelt 2021-03-10 4:47 ` Palmer Dabbelt
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