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47 lines
1.1 KiB
47 lines
1.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2015 Thomas Meyer ([email protected]) |
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* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
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*/ |
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#include <signal.h> |
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#include <sched.h> |
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#include <asm/unistd.h> |
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#include <sys/time.h> |
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#include <as-layout.h> |
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#include <ptrace_user.h> |
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#include <stub-data.h> |
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#include <sysdep/stub.h> |
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/* |
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* This is in a separate file because it needs to be compiled with any |
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* extraneous gcc flags (-pg, -fprofile-arcs, -ftest-coverage) disabled |
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* |
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* Use UM_KERN_PAGE_SIZE instead of PAGE_SIZE because that calls getpagesize |
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* on some systems. |
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*/ |
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void __attribute__ ((__section__ (".__syscall_stub"))) |
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stub_clone_handler(void) |
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{ |
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struct stub_data *data = get_stub_page(); |
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long err; |
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err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD, |
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(unsigned long)data + UM_KERN_PAGE_SIZE / 2); |
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if (err) { |
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data->parent_err = err; |
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goto done; |
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} |
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err = stub_syscall4(__NR_ptrace, PTRACE_TRACEME, 0, 0, 0); |
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if (err) { |
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data->child_err = err; |
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goto done; |
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} |
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remap_stack_and_trap(); |
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done: |
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trap_myself(); |
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}
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