mirror of https://gitee.com/openkylin/linux.git
42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
/*
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* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Licensed under the GPL
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*/
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#include <linux/kernel.h>
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#include <linux/ptrace.h>
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#include <linux/seccomp.h>
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#include <kern_util.h>
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#include <sysdep/ptrace.h>
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#include <sysdep/ptrace_user.h>
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#include <sysdep/syscalls.h>
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void handle_syscall(struct uml_pt_regs *r)
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{
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struct pt_regs *regs = container_of(r, struct pt_regs, regs);
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int syscall;
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/* Initialize the syscall number and default return value. */
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UPT_SYSCALL_NR(r) = PT_SYSCALL_NR(r->gp);
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PT_REGS_SET_SYSCALL_RETURN(regs, -ENOSYS);
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if (syscall_trace_enter(regs))
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return;
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/* Do the seccomp check after ptrace; failures should be fast. */
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if (secure_computing(NULL) == -1)
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return;
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/* Update the syscall number after orig_ax has potentially been updated
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* with ptrace.
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*/
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UPT_SYSCALL_NR(r) = PT_SYSCALL_NR(r->gp);
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syscall = UPT_SYSCALL_NR(r);
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if (syscall >= 0 && syscall <= __NR_syscall_max)
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PT_REGS_SET_SYSCALL_RETURN(regs,
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EXECUTE_SYSCALL(syscall, regs));
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syscall_trace_leave(regs);
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}
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