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Author SHA1 Message Date
Andrei Vagin 17c18241cd platform/syscall: use syscall + int3 to execute a system call in a stub process 
Right now, we need to call ptrace(PTRACE_SYSCALL) and wait() twice to execute
one system call in a stub process. With these changes, we will need to call
ptrace + wait only once.

In addition, this allows to workaround the kernel bug when a stub process
doesn't stop on syscall-exit-stop and starts executing the next system call.

Reported-by: syzbot+37143cafa8dc3b5008ee@syzkaller.appspotmail.com
PiperOrigin-RevId: 288393029
 2020-01-06 15:54:53 -08:00
Haibo Xu 1c9da886e7 Add initial ptrace stub and syscall support for arm64. 
Signed-off-by: Haibo Xu <haibo.xu@arm.com>
Change-Id: I1dbd23bb240cca71d0cc30fc75ca5be28cb4c37c
PiperOrigin-RevId: 262619519
 2019-08-09 13:18:11 -07:00