--- zzzz-none-000/linux-3.10.107/include/linux/uprobes.h 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/include/linux/uprobes.h 2021-02-04 17:41:59.000000000 +0000 @@ -21,19 +21,18 @@ * Authors: * Srikar Dronamraju * Jim Keniston - * Copyright (C) 2011-2012 Red Hat, Inc., Peter Zijlstra + * Copyright (C) 2011-2012 Red Hat, Inc., Peter Zijlstra */ #include #include +#include struct vm_area_struct; struct mm_struct; struct inode; - -#ifdef CONFIG_ARCH_SUPPORTS_UPROBES -# include -#endif +struct notifier_block; +struct page; #define UPROBE_HANDLER_REMOVE 1 #define UPROBE_HANDLER_MASK 1 @@ -59,6 +58,8 @@ }; #ifdef CONFIG_UPROBES +#include + enum uprobe_task_state { UTASK_RUNNING, UTASK_SSTEP, @@ -71,43 +72,55 @@ */ struct uprobe_task { enum uprobe_task_state state; - struct arch_uprobe_task autask; + + union { + struct { + struct arch_uprobe_task autask; + unsigned long vaddr; + }; + + struct { + struct callback_head dup_xol_work; + unsigned long dup_xol_addr; + }; + }; + + struct uprobe *active_uprobe; + unsigned long xol_vaddr; struct return_instance *return_instances; unsigned int depth; - struct uprobe *active_uprobe; +}; - unsigned long xol_vaddr; - unsigned long vaddr; +struct return_instance { + struct uprobe *uprobe; + unsigned long func; + unsigned long stack; /* stack pointer */ + unsigned long orig_ret_vaddr; /* original return address */ + bool chained; /* true, if instance is nested */ + + struct return_instance *next; /* keep as stack */ }; -/* - * On a breakpoint hit, thread contests for a slot. It frees the - * slot after singlestep. Currently a fixed number of slots are - * allocated. - */ -struct xol_area { - wait_queue_head_t wq; /* if all slots are busy */ - atomic_t slot_count; /* number of in-use slots */ - unsigned long *bitmap; /* 0 = free slot */ - struct page *page; - - /* - * We keep the vma's vm_start rather than a pointer to the vma - * itself. The probed process or a naughty kernel module could make - * the vma go away, and we must handle that reasonably gracefully. - */ - unsigned long vaddr; /* Page(s) of instruction slots */ +enum rp_check { + RP_CHECK_CALL, + RP_CHECK_CHAIN_CALL, + RP_CHECK_RET, }; +struct xol_area; + struct uprobes_state { struct xol_area *xol_area; }; -extern int __weak set_swbp(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr); -extern int __weak set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr); -extern bool __weak is_swbp_insn(uprobe_opcode_t *insn); -extern bool __weak is_trap_insn(uprobe_opcode_t *insn); +extern int set_swbp(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr); +extern int set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr); +extern bool is_swbp_insn(uprobe_opcode_t *insn); +extern bool is_trap_insn(uprobe_opcode_t *insn); +extern unsigned long uprobe_get_swbp_addr(struct pt_regs *regs); +extern unsigned long uprobe_get_trap_addr(struct pt_regs *regs); +extern int uprobe_write_opcode(struct mm_struct *mm, unsigned long vaddr, uprobe_opcode_t); extern int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc); extern int uprobe_apply(struct inode *inode, loff_t offset, struct uprobe_consumer *uc, bool); extern void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc); @@ -117,17 +130,30 @@ extern void uprobe_end_dup_mmap(void); extern void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm); extern void uprobe_free_utask(struct task_struct *t); -extern void uprobe_copy_process(struct task_struct *t); -extern unsigned long __weak uprobe_get_swbp_addr(struct pt_regs *regs); +extern void uprobe_copy_process(struct task_struct *t, unsigned long flags); extern int uprobe_post_sstep_notifier(struct pt_regs *regs); extern int uprobe_pre_sstep_notifier(struct pt_regs *regs); extern void uprobe_notify_resume(struct pt_regs *regs); extern bool uprobe_deny_signal(void); -extern bool __weak arch_uprobe_skip_sstep(struct arch_uprobe *aup, struct pt_regs *regs); +extern bool arch_uprobe_skip_sstep(struct arch_uprobe *aup, struct pt_regs *regs); extern void uprobe_clear_state(struct mm_struct *mm); +extern int arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr); +extern int arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs); +extern int arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs); +extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk); +extern int arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data); +extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs); +extern unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline_vaddr, struct pt_regs *regs); +extern bool arch_uretprobe_is_alive(struct return_instance *ret, enum rp_check ctx, struct pt_regs *regs); +extern bool arch_uprobe_ignore(struct arch_uprobe *aup, struct pt_regs *regs); +extern void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr, + void *src, unsigned long len); #else /* !CONFIG_UPROBES */ struct uprobes_state { }; + +#define uprobe_get_trap_addr(regs) instruction_pointer(regs) + static inline int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc) { @@ -167,14 +193,10 @@ { return false; } -static inline unsigned long uprobe_get_swbp_addr(struct pt_regs *regs) -{ - return 0; -} static inline void uprobe_free_utask(struct task_struct *t) { } -static inline void uprobe_copy_process(struct task_struct *t) +static inline void uprobe_copy_process(struct task_struct *t, unsigned long flags) { } static inline void uprobe_clear_state(struct mm_struct *mm)