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linux-user: Adjust child_tidptr on set_tid_address() syscall

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Keep track of the new child tidptr given by a set_tid_address() syscall.

Do not call the host set_tid_address() syscall because we are emulating
the behaviour of writing to child_tidptr in the exit() path.

Signed-off-by: Helge Deller<deller@gmx.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <YpH+2sw1PCRqx/te@p100>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Helge Deller 2022-05-28 12:52:10 +02:00 committed by Laurent Vivier
parent 892a4f6a75
commit 9a7f682c26
1 changed files with 7 additions and 5 deletions
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12
linux-user/syscall.c
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@ -320,9 +320,6 @@ _syscall3(int,sys_syslog,int,type,char*,bufp,int,len)
#ifdef __NR_exit_group
_syscall1(int,exit_group,int,error_code)
#endif
#if defined(TARGET_NR_set_tid_address) && defined(__NR_set_tid_address)
_syscall1(int,set_tid_address,int *,tidptr)
#endif
#if defined(__NR_futex)
_syscall6(int,sys_futex,int *,uaddr,int,op,int,val,
const struct timespec *,timeout,int *,uaddr2,int,val3)
@ -12196,9 +12193,14 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1,
}
#endif
#if defined(TARGET_NR_set_tid_address) && defined(__NR_set_tid_address)
#if defined(TARGET_NR_set_tid_address)
case TARGET_NR_set_tid_address:
return get_errno(set_tid_address((int *)g2h(cpu, arg1)));
{
TaskState *ts = cpu->opaque;
ts->child_tidptr = arg1;
/* do not call host set_tid_address() syscall, instead return tid() */
return get_errno(sys_gettid());
}
#endif
case TARGET_NR_tkill: