diff options
Diffstat (limited to 'arch/x86/kernel/kprobes_32.c')
| -rw-r--r-- | arch/x86/kernel/kprobes_32.c | 92 |
1 files changed, 46 insertions, 46 deletions
diff --git a/arch/x86/kernel/kprobes_32.c b/arch/x86/kernel/kprobes_32.c index bc4a68367cd0..d708cd4f956f 100644 --- a/arch/x86/kernel/kprobes_32.c +++ b/arch/x86/kernel/kprobes_32.c @@ -212,7 +212,7 @@ static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs, { __get_cpu_var(current_kprobe) = p; kcb->kprobe_saved_eflags = kcb->kprobe_old_eflags - = (regs->eflags & (TF_MASK | IF_MASK)); + = (regs->flags & (TF_MASK | IF_MASK)); if (is_IF_modifier(p->opcode)) kcb->kprobe_saved_eflags &= ~IF_MASK; } @@ -232,20 +232,20 @@ static __always_inline void restore_btf(void) static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs) { clear_btf(); - regs->eflags |= TF_MASK; - regs->eflags &= ~IF_MASK; + regs->flags |= TF_MASK; + regs->flags &= ~IF_MASK; /*single step inline if the instruction is an int3*/ if (p->opcode == BREAKPOINT_INSTRUCTION) - regs->eip = (unsigned long)p->addr; + regs->ip = (unsigned long)p->addr; else - regs->eip = (unsigned long)p->ainsn.insn; + regs->ip = (unsigned long)p->ainsn.insn; } /* Called with kretprobe_lock held */ void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri, struct pt_regs *regs) { - unsigned long *sara = (unsigned long *)®s->esp; + unsigned long *sara = (unsigned long *)®s->sp; ri->ret_addr = (kprobe_opcode_t *) *sara; @@ -264,7 +264,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs) kprobe_opcode_t *addr; struct kprobe_ctlblk *kcb; - addr = (kprobe_opcode_t *)(regs->eip - sizeof(kprobe_opcode_t)); + addr = (kprobe_opcode_t *)(regs->ip - sizeof(kprobe_opcode_t)); /* * We don't want to be preempted for the entire @@ -279,8 +279,8 @@ static int __kprobes kprobe_handler(struct pt_regs *regs) if (p) { if (kcb->kprobe_status == KPROBE_HIT_SS && *p->ainsn.insn == BREAKPOINT_INSTRUCTION) { - regs->eflags &= ~TF_MASK; - regs->eflags |= kcb->kprobe_saved_eflags; + regs->flags &= ~TF_MASK; + regs->flags |= kcb->kprobe_saved_eflags; goto no_kprobe; } /* We have reentered the kprobe_handler(), since @@ -301,7 +301,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs) * another cpu right after we hit, no further * handling of this interrupt is appropriate */ - regs->eip -= sizeof(kprobe_opcode_t); + regs->ip -= sizeof(kprobe_opcode_t); ret = 1; goto no_kprobe; } @@ -325,7 +325,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs) * Back up over the (now missing) int3 and run * the original instruction. */ - regs->eip -= sizeof(kprobe_opcode_t); + regs->ip -= sizeof(kprobe_opcode_t); ret = 1; } /* Not one of ours: let kernel handle it */ @@ -344,7 +344,7 @@ ss_probe: if (p->ainsn.boostable == 1 && !p->post_handler){ /* Boost up -- we can execute copied instructions directly */ reset_current_kprobe(); - regs->eip = (unsigned long)p->ainsn.insn; + regs->ip = (unsigned long)p->ainsn.insn; preempt_enable_no_resched(); return 1; } @@ -368,7 +368,7 @@ no_kprobe: asm volatile ( ".global kretprobe_trampoline\n" "kretprobe_trampoline: \n" " pushf\n" - /* skip cs, eip, orig_eax */ + /* skip cs, ip, orig_ax */ " subl $12, %esp\n" " pushl %fs\n" " pushl %ds\n" @@ -382,10 +382,10 @@ no_kprobe: " pushl %ebx\n" " movl %esp, %eax\n" " call trampoline_handler\n" - /* move eflags to cs */ + /* move flags to cs */ " movl 52(%esp), %edx\n" " movl %edx, 48(%esp)\n" - /* save true return address on eflags */ + /* save true return address on flags */ " movl %eax, 52(%esp)\n" " popl %ebx\n" " popl %ecx\n" @@ -394,7 +394,7 @@ no_kprobe: " popl %edi\n" " popl %ebp\n" " popl %eax\n" - /* skip eip, orig_eax, es, ds, fs */ + /* skip ip, orig_ax, es, ds, fs */ " addl $20, %esp\n" " popf\n" " ret\n"); @@ -415,9 +415,9 @@ fastcall void *__kprobes trampoline_handler(struct pt_regs *regs) spin_lock_irqsave(&kretprobe_lock, flags); head = kretprobe_inst_table_head(current); /* fixup registers */ - regs->xcs = __KERNEL_CS | get_kernel_rpl(); - regs->eip = trampoline_address; - regs->orig_eax = 0xffffffff; + regs->cs = __KERNEL_CS | get_kernel_rpl(); + regs->ip = trampoline_address; + regs->orig_ax = 0xffffffff; /* * It is possible to have multiple instances associated with a given @@ -478,11 +478,11 @@ fastcall void *__kprobes trampoline_handler(struct pt_regs *regs) * interrupt. We have to fix up the stack as follows: * * 0) Except in the case of absolute or indirect jump or call instructions, - * the new eip is relative to the copied instruction. We need to make + * the new ip is relative to the copied instruction. We need to make * it relative to the original instruction. * * 1) If the single-stepped instruction was pushfl, then the TF and IF - * flags are set in the just-pushed eflags, and may need to be cleared. + * flags are set in the just-pushed flags, and may need to be cleared. * * 2) If the single-stepped instruction was a call, the return address * that is atop the stack is the address following the copied instruction. @@ -493,11 +493,11 @@ fastcall void *__kprobes trampoline_handler(struct pt_regs *regs) static void __kprobes resume_execution(struct kprobe *p, struct pt_regs *regs, struct kprobe_ctlblk *kcb) { - unsigned long *tos = (unsigned long *)®s->esp; + unsigned long *tos = (unsigned long *)®s->sp; unsigned long copy_eip = (unsigned long)p->ainsn.insn; unsigned long orig_eip = (unsigned long)p->addr; - regs->eflags &= ~TF_MASK; + regs->flags &= ~TF_MASK; switch (p->ainsn.insn[0]) { case 0x9c: /* pushfl */ *tos &= ~(TF_MASK | IF_MASK); @@ -508,8 +508,8 @@ static void __kprobes resume_execution(struct kprobe *p, case 0xca: case 0xcb: case 0xcf: - case 0xea: /* jmp absolute -- eip is correct */ - /* eip is already adjusted, no more changes required */ + case 0xea: /* jmp absolute -- ip is correct */ + /* ip is already adjusted, no more changes required */ p->ainsn.boostable = 1; goto no_change; case 0xe8: /* call relative - Fix return addr */ @@ -522,14 +522,14 @@ static void __kprobes resume_execution(struct kprobe *p, if ((p->ainsn.insn[1] & 0x30) == 0x10) { /* * call absolute, indirect - * Fix return addr; eip is correct. + * Fix return addr; ip is correct. * But this is not boostable */ *tos = orig_eip + (*tos - copy_eip); goto no_change; } else if (((p->ainsn.insn[1] & 0x31) == 0x20) || /* jmp near, absolute indirect */ ((p->ainsn.insn[1] & 0x31) == 0x21)) { /* jmp far, absolute indirect */ - /* eip is correct. And this is boostable */ + /* ip is correct. And this is boostable */ p->ainsn.boostable = 1; goto no_change; } @@ -538,21 +538,21 @@ static void __kprobes resume_execution(struct kprobe *p, } if (p->ainsn.boostable == 0) { - if ((regs->eip > copy_eip) && - (regs->eip - copy_eip) + 5 < MAX_INSN_SIZE) { + if ((regs->ip > copy_eip) && + (regs->ip - copy_eip) + 5 < MAX_INSN_SIZE) { /* * These instructions can be executed directly if it * jumps back to correct address. */ - set_jmp_op((void *)regs->eip, - (void *)orig_eip + (regs->eip - copy_eip)); + set_jmp_op((void *)regs->ip, + (void *)orig_eip + (regs->ip - copy_eip)); p->ainsn.boostable = 1; } else { p->ainsn.boostable = -1; } } - regs->eip = orig_eip + (regs->eip - copy_eip); + regs->ip = orig_eip + (regs->ip - copy_eip); no_change: restore_btf(); @@ -578,8 +578,8 @@ static int __kprobes post_kprobe_handler(struct pt_regs *regs) } resume_execution(cur, regs, kcb); - regs->eflags |= kcb->kprobe_saved_eflags; - trace_hardirqs_fixup_flags(regs->eflags); + regs->flags |= kcb->kprobe_saved_eflags; + trace_hardirqs_fixup_flags(regs->flags); /*Restore back the original saved kprobes variables and continue. */ if (kcb->kprobe_status == KPROBE_REENTER) { @@ -591,11 +591,11 @@ out: preempt_enable_no_resched(); /* - * if somebody else is singlestepping across a probe point, eflags + * if somebody else is singlestepping across a probe point, flags * will have TF set, in which case, continue the remaining processing * of do_debug, as if this is not a probe hit. */ - if (regs->eflags & TF_MASK) + if (regs->flags & TF_MASK) return 0; return 1; @@ -612,12 +612,12 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr) /* * We are here because the instruction being single * stepped caused a page fault. We reset the current - * kprobe and the eip points back to the probe address + * kprobe and the ip points back to the probe address * and allow the page fault handler to continue as a * normal page fault. */ - regs->eip = (unsigned long)cur->addr; - regs->eflags |= kcb->kprobe_old_eflags; + regs->ip = (unsigned long)cur->addr; + regs->flags |= kcb->kprobe_old_eflags; if (kcb->kprobe_status == KPROBE_REENTER) restore_previous_kprobe(kcb); else @@ -703,7 +703,7 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs) struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); kcb->jprobe_saved_regs = *regs; - kcb->jprobe_saved_esp = ®s->esp; + kcb->jprobe_saved_esp = ®s->sp; addr = (unsigned long)(kcb->jprobe_saved_esp); /* @@ -715,9 +715,9 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs) */ memcpy(kcb->jprobes_stack, (kprobe_opcode_t *)addr, MIN_STACK_SIZE(addr)); - regs->eflags &= ~IF_MASK; + regs->flags &= ~IF_MASK; trace_hardirqs_off(); - regs->eip = (unsigned long)(jp->entry); + regs->ip = (unsigned long)(jp->entry); return 1; } @@ -736,15 +736,15 @@ void __kprobes jprobe_return(void) int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs) { struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); - u8 *addr = (u8 *) (regs->eip - 1); + u8 *addr = (u8 *) (regs->ip - 1); unsigned long stack_addr = (unsigned long)(kcb->jprobe_saved_esp); struct jprobe *jp = container_of(p, struct jprobe, kp); if ((addr > (u8 *) jprobe_return) && (addr < (u8 *) jprobe_return_end)) { - if (®s->esp != kcb->jprobe_saved_esp) { + if (®s->sp != kcb->jprobe_saved_esp) { struct pt_regs *saved_regs = &kcb->jprobe_saved_regs; - printk("current esp %p does not match saved esp %p\n", - ®s->esp, kcb->jprobe_saved_esp); + printk("current sp %p does not match saved sp %p\n", + ®s->sp, kcb->jprobe_saved_esp); printk("Saved registers for jprobe %p\n", jp); show_registers(saved_regs); printk("Current registers\n"); |