threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/*
|
|
* Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
|
|
* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include <signal.h>
|
|
#include <sched.h>
|
|
#include <asm/unistd.h>
|
|
#include <sys/time.h>
|
|
#include <as-layout.h>
|
|
#include <ptrace_user.h>
|
|
#include <stub-data.h>
|
|
#include <sysdep/stub.h>
|
|
|
|
/*
|
|
* This is in a separate file because it needs to be compiled with any
|
|
* extraneous gcc flags (-pg, -fprofile-arcs, -ftest-coverage) disabled
|
|
*
|
|
* Use UM_KERN_PAGE_SIZE instead of PAGE_SIZE because that calls getpagesize
|
|
* on some systems.
|
|
*/
|
|
|
|
void __attribute__ ((__section__ (".__syscall_stub")))
|
|
stub_clone_handler(void)
|
|
{
|
|
struct stub_data *data = (struct stub_data *) STUB_DATA;
|
|
long err;
|
|
|
|
err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD,
|
|
STUB_DATA + UM_KERN_PAGE_SIZE / 2 - sizeof(void *));
|
|
if (err != 0)
|
|
goto out;
|
|
|
|
err = stub_syscall4(__NR_ptrace, PTRACE_TRACEME, 0, 0, 0);
|
|
if (err)
|
|
goto out;
|
|
|
|
remap_stack(data->fd, data->offset);
|
|
goto done;
|
|
|
|
out:
|
|
/*
|
|
* save current result.
|
|
* Parent: pid;
|
|
* child: retcode of mmap already saved and it jumps around this
|
|
* assignment
|
|
*/
|
|
data->err = err;
|
|
done:
|
|
trap_myself();
|
|
}
|