ADD file via upload

syscall.diff

@@ -0,0 +1,35 @@
+--- qemu-2.10.0-rc3-clean/linux-user/syscall.c	2017-08-15 11:39:41.000000000 -0700
++++ qemu-2.10.0-rc3/linux-user/syscall.c	2017-08-22 14:34:03.193088186 -0700
+@@ -116,6 +116,8 @@
+ 
+ #include "qemu.h"
+ 
++extern unsigned int afl_forksrv_pid;
++
+ #ifndef CLONE_IO
+ #define CLONE_IO                0x80000000      /* Clone io context */
+ #endif
+@@ -11688,8 +11690,21 @@
+         break;
+ 
+     case TARGET_NR_tgkill:
+-        ret = get_errno(safe_tgkill((int)arg1, (int)arg2,
+-                        target_to_host_signal(arg3)));
++
++        {
++          int pid  = (int)arg1,
++              tgid = (int)arg2,
++              sig  = (int)arg3;
++
++          /* Not entirely sure if the below is correct for all architectures. */
++
++          if(afl_forksrv_pid && afl_forksrv_pid == pid && sig == SIGABRT)
++              pid = tgid = getpid();
++
++          ret = get_errno(safe_tgkill(pid, tgid, target_to_host_signal(sig)));
++
++        }
++
+         break;
+ 
+ #ifdef TARGET_NR_set_robust_list