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| author | Oleg Nesterov <oleg@redhat.com> | 2014-04-27 17:00:46 +0200 |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2014-04-30 19:10:41 +0200 |
| commit | 7f55e82bacaaa2c41b8e14d6bc78129b096b67b8 (patch) | |
| tree | 7166cb95297d80d36637af6a6a6470baaadca6a0 | |
| parent | 1475ee7fadafc6d0c194f2f4cbdae10ed04b9580 (diff) | |
| download | op-kernel-dev-7f55e82bacaaa2c41b8e14d6bc78129b096b67b8.zip op-kernel-dev-7f55e82bacaaa2c41b8e14d6bc78129b096b67b8.tar.gz | |
uprobes/x86: Kill the "autask" arg of riprel_pre_xol()
default_pre_xol_op() passes ¤t->utask->autask to riprel_pre_xol()
and this is just ugly because it still needs to load current->utask to
read ->vaddr.
Remove this argument, change riprel_pre_xol() to use current->utask.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
| -rw-r--r-- | arch/x86/kernel/uprobes.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/arch/x86/kernel/uprobes.c b/arch/x86/kernel/uprobes.c index 187be0e..5df1bca 100644 --- a/arch/x86/kernel/uprobes.c +++ b/arch/x86/kernel/uprobes.c @@ -330,16 +330,17 @@ static void riprel_analyze(struct arch_uprobe *auprobe, struct insn *insn) * If we're emulating a rip-relative instruction, save the contents * of the scratch register and store the target address in that register. */ -static void riprel_pre_xol(struct arch_uprobe *auprobe, struct pt_regs *regs, - struct arch_uprobe_task *autask) +static void riprel_pre_xol(struct arch_uprobe *auprobe, struct pt_regs *regs) { + struct uprobe_task *utask = current->utask; + if (auprobe->def.fixups & UPROBE_FIX_RIP_AX) { - autask->saved_scratch_register = regs->ax; - regs->ax = current->utask->vaddr; + utask->autask.saved_scratch_register = regs->ax; + regs->ax = utask->vaddr; regs->ax += auprobe->def.riprel_target; } else if (auprobe->def.fixups & UPROBE_FIX_RIP_CX) { - autask->saved_scratch_register = regs->cx; - regs->cx = current->utask->vaddr; + utask->autask.saved_scratch_register = regs->cx; + regs->cx = utask->vaddr; regs->cx += auprobe->def.riprel_target; } } @@ -377,8 +378,7 @@ static inline bool is_64bit_mm(struct mm_struct *mm) static void riprel_analyze(struct arch_uprobe *auprobe, struct insn *insn) { } -static void riprel_pre_xol(struct arch_uprobe *auprobe, struct pt_regs *regs, - struct arch_uprobe_task *autask) +static void riprel_pre_xol(struct arch_uprobe *auprobe, struct pt_regs *regs) { } static void riprel_post_xol(struct arch_uprobe *auprobe, struct pt_regs *regs, @@ -401,7 +401,7 @@ static inline int sizeof_long(void) static int default_pre_xol_op(struct arch_uprobe *auprobe, struct pt_regs *regs) { - riprel_pre_xol(auprobe, regs, ¤t->utask->autask); + riprel_pre_xol(auprobe, regs); return 0; } |
