| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 2 | /* |
| 3 | * QEMU internal errno values for implementing user-only POSIX. |
| 4 | * |
| 5 | * Copyright (c) 2003 Fabrice Bellard |
| 6 | * Copyright (c) 2021 Linaro, Ltd. |
| 7 | */ |
| 8 | |
| 9 | #ifndef SPECIAL_ERRNO_H |
| 10 | #define SPECIAL_ERRNO_H |
| 11 | |
| 12 | /* |
| 13 | * All of these are QEMU internal, not visible to the guest. |
| 14 | * They should be chosen so as to not overlap with any host |
| 15 | * or guest errno. |
| 16 | */ |
| 17 | |
| 18 | /* |
| 19 | * This is returned when a system call should be restarted, to tell the |
| 20 | * main loop that it should wind the guest PC backwards so it will |
| 21 | * re-execute the syscall after handling any pending signals. |
| 22 | */ |
| 23 | #define QEMU_ERESTARTSYS 512 |
| 24 | |
| 25 | /* |
| 26 | * This is returned after a successful sigreturn syscall, to indicate |
| 27 | * that it has correctly set the guest registers and so the main loop |
| 28 | * should not touch them. |
| 29 | */ |
| 30 | #define QEMU_ESIGRETURN 513 |
| 31 | |
| 32 | /* |
| 33 | * This is returned after a plugin has used the qemu_plugin_set_pc API, to |
| 34 | * indicate that the plugin deliberately changed the PC and potentially |
| 35 | * modified the register values. The main loop should not touch the guest |
| 36 | * registers for this reason. |
| 37 | */ |
| 38 | #define QEMU_ESETPC 514 |
| 39 | |
| 40 | #endif /* SPECIAL_ERRNO_H */ |