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-rw-r--r--arch/arm/kernel/uprobes.c230
1 files changed, 0 insertions, 230 deletions
diff --git a/arch/arm/kernel/uprobes.c b/arch/arm/kernel/uprobes.c
deleted file mode 100644
index 56adf9c1fde0..000000000000
--- a/arch/arm/kernel/uprobes.c
+++ /dev/null
@@ -1,230 +0,0 @@
-/*
- * Copyright (C) 2012 Rabin Vincent <rabin at rab.in>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/stddef.h>
-#include <linux/errno.h>
-#include <linux/highmem.h>
-#include <linux/sched.h>
-#include <linux/uprobes.h>
-#include <linux/notifier.h>
-
-#include <asm/opcodes.h>
-#include <asm/traps.h>
-
-#include "probes.h"
-#include "probes-arm.h"
-#include "uprobes.h"
-
-#define UPROBE_TRAP_NR UINT_MAX
-
-bool is_swbp_insn(uprobe_opcode_t *insn)
-{
- return (__mem_to_opcode_arm(*insn) & 0x0fffffff) ==
- (UPROBE_SWBP_ARM_INSN & 0x0fffffff);
-}
-
-int set_swbp(struct arch_uprobe *auprobe, struct mm_struct *mm,
- unsigned long vaddr)
-{
- return uprobe_write_opcode(mm, vaddr,
- __opcode_to_mem_arm(auprobe->bpinsn));
-}
-
-bool arch_uprobe_ignore(struct arch_uprobe *auprobe, struct pt_regs *regs)
-{
- if (!auprobe->asi.insn_check_cc(regs->ARM_cpsr)) {
- regs->ARM_pc += 4;
- return true;
- }
-
- return false;
-}
-
-bool arch_uprobe_skip_sstep(struct arch_uprobe *auprobe, struct pt_regs *regs)
-{
- probes_opcode_t opcode;
-
- if (!auprobe->simulate)
- return false;
-
- opcode = __mem_to_opcode_arm(*(unsigned int *) auprobe->insn);
-
- auprobe->asi.insn_singlestep(opcode, &auprobe->asi, regs);
-
- return true;
-}
-
-unsigned long
-arch_uretprobe_hijack_return_addr(unsigned long trampoline_vaddr,
- struct pt_regs *regs)
-{
- unsigned long orig_ret_vaddr;
-
- orig_ret_vaddr = regs->ARM_lr;
- /* Replace the return addr with trampoline addr */
- regs->ARM_lr = trampoline_vaddr;
- return orig_ret_vaddr;
-}
-
-int arch_uprobe_analyze_insn(struct arch_uprobe *auprobe, struct mm_struct *mm,
- unsigned long addr)
-{
- unsigned int insn;
- unsigned int bpinsn;
- enum probes_insn ret;
-
- /* Thumb not yet support */
- if (addr & 0x3)
- return -EINVAL;
-
- insn = __mem_to_opcode_arm(*(unsigned int *)auprobe->insn);
- auprobe->ixol[0] = __opcode_to_mem_arm(insn);
- auprobe->ixol[1] = __opcode_to_mem_arm(UPROBE_SS_ARM_INSN);
-
- ret = arm_probes_decode_insn(insn, &auprobe->asi, false,
- uprobes_probes_actions);
- switch (ret) {
- case INSN_REJECTED:
- return -EINVAL;
-
- case INSN_GOOD_NO_SLOT:
- auprobe->simulate = true;
- break;
-
- case INSN_GOOD:
- default:
- break;
- }
-
- bpinsn = UPROBE_SWBP_ARM_INSN & 0x0fffffff;
- if (insn >= 0xe0000000)
- bpinsn |= 0xe0000000; /* Unconditional instruction */
- else
- bpinsn |= insn & 0xf0000000; /* Copy condition from insn */
-
- auprobe->bpinsn = bpinsn;
-
- return 0;
-}
-
-void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
- void *src, unsigned long len)
-{
- void *xol_page_kaddr = kmap_atomic(page);
- void *dst = xol_page_kaddr + (vaddr & ~PAGE_MASK);
-
- preempt_disable();
-
- /* Initialize the slot */
- memcpy(dst, src, len);
-
- /* flush caches (dcache/icache) */
- flush_uprobe_xol_access(page, vaddr, dst, len);
-
- preempt_enable();
-
- kunmap_atomic(xol_page_kaddr);
-}
-
-
-int arch_uprobe_pre_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
-{
- struct uprobe_task *utask = current->utask;
-
- if (auprobe->prehandler)
- auprobe->prehandler(auprobe, &utask->autask, regs);
-
- utask->autask.saved_trap_no = current->thread.trap_no;
- current->thread.trap_no = UPROBE_TRAP_NR;
- regs->ARM_pc = utask->xol_vaddr;
-
- return 0;
-}
-
-int arch_uprobe_post_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
-{
- struct uprobe_task *utask = current->utask;
-
- WARN_ON_ONCE(current->thread.trap_no != UPROBE_TRAP_NR);
-
- current->thread.trap_no = utask->autask.saved_trap_no;
- regs->ARM_pc = utask->vaddr + 4;
-
- if (auprobe->posthandler)
- auprobe->posthandler(auprobe, &utask->autask, regs);
-
- return 0;
-}
-
-bool arch_uprobe_xol_was_trapped(struct task_struct *t)
-{
- if (t->thread.trap_no != UPROBE_TRAP_NR)
- return true;
-
- return false;
-}
-
-void arch_uprobe_abort_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
-{
- struct uprobe_task *utask = current->utask;
-
- current->thread.trap_no = utask->autask.saved_trap_no;
- instruction_pointer_set(regs, utask->vaddr);
-}
-
-int arch_uprobe_exception_notify(struct notifier_block *self,
- unsigned long val, void *data)
-{
- return NOTIFY_DONE;
-}
-
-static int uprobe_trap_handler(struct pt_regs *regs, unsigned int instr)
-{
- unsigned long flags;
-
- local_irq_save(flags);
- instr &= 0x0fffffff;
- if (instr == (UPROBE_SWBP_ARM_INSN & 0x0fffffff))
- uprobe_pre_sstep_notifier(regs);
- else if (instr == (UPROBE_SS_ARM_INSN & 0x0fffffff))
- uprobe_post_sstep_notifier(regs);
- local_irq_restore(flags);
-
- return 0;
-}
-
-unsigned long uprobe_get_swbp_addr(struct pt_regs *regs)
-{
- return instruction_pointer(regs);
-}
-
-static struct undef_hook uprobes_arm_break_hook = {
- .instr_mask = 0x0fffffff,
- .instr_val = (UPROBE_SWBP_ARM_INSN & 0x0fffffff),
- .cpsr_mask = MODE_MASK,
- .cpsr_val = USR_MODE,
- .fn = uprobe_trap_handler,
-};
-
-static struct undef_hook uprobes_arm_ss_hook = {
- .instr_mask = 0x0fffffff,
- .instr_val = (UPROBE_SS_ARM_INSN & 0x0fffffff),
- .cpsr_mask = MODE_MASK,
- .cpsr_val = USR_MODE,
- .fn = uprobe_trap_handler,
-};
-
-static int arch_uprobes_init(void)
-{
- register_undef_hook(&uprobes_arm_break_hook);
- register_undef_hook(&uprobes_arm_ss_hook);
-
- return 0;
-}
-device_initcall(arch_uprobes_init);