]>
Commit | Line | Data |
---|---|---|
457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
2dd14934 AB |
2 | /* |
3 | * System call callback functions for SPUs | |
4 | */ | |
5 | ||
c70d4ca5 | 6 | #undef DEBUG |
2dd14934 AB |
7 | |
8 | #include <linux/kallsyms.h> | |
4b16f8e2 | 9 | #include <linux/export.h> |
2dd14934 AB |
10 | #include <linux/syscalls.h> |
11 | ||
12 | #include <asm/spu.h> | |
13 | #include <asm/syscalls.h> | |
14 | #include <asm/unistd.h> | |
15 | ||
16 | /* | |
17 | * This table defines the system calls that an SPU can call. | |
18 | * It is currently a subset of the 64 bit powerpc system calls, | |
19 | * with the exact semantics. | |
20 | * | |
21 | * The reasons for disabling some of the system calls are: | |
22 | * 1. They interact with the way SPU syscalls are handled | |
23 | * and we can't let them execute ever: | |
24 | * restart_syscall, exit, for, execve, ptrace, ... | |
25 | * 2. They are deprecated and replaced by other means: | |
26 | * uselib, pciconfig_*, sysfs, ... | |
27 | * 3. They are somewhat interacting with the system in a way | |
28 | * we don't want an SPU to: | |
29 | * reboot, init_module, mount, kexec_load | |
30 | * 4. They are optional and we can't rely on them being | |
31 | * linked into the kernel. Unfortunately, the cond_syscall | |
32 | * helper does not work here as it does not add the necessary | |
33 | * opd symbols: | |
34 | * mbind, mq_open, ipc, ... | |
35 | */ | |
36 | ||
1238819a | 37 | static void *spu_syscall_table[] = { |
6b1200fa | 38 | #define __SYSCALL(nr, entry) entry, |
ab66dcc7 FK |
39 | #include <asm/syscall_table_spu.h> |
40 | #undef __SYSCALL | |
2dd14934 AB |
41 | }; |
42 | ||
43 | long spu_sys_callback(struct spu_syscall_block *s) | |
44 | { | |
45 | long (*syscall)(u64 a1, u64 a2, u64 a3, u64 a4, u64 a5, u64 a6); | |
46 | ||
23b2527d | 47 | if (s->nr_ret >= ARRAY_SIZE(spu_syscall_table)) { |
fe333321 | 48 | pr_debug("%s: invalid syscall #%lld", __func__, s->nr_ret); |
2dd14934 AB |
49 | return -ENOSYS; |
50 | } | |
51 | ||
b471f554 DW |
52 | syscall = spu_syscall_table[s->nr_ret]; |
53 | ||
03743716 JP |
54 | pr_debug("SPU-syscall " |
55 | "%pSR:syscall%lld(%llx, %llx, %llx, %llx, %llx, %llx)\n", | |
56 | syscall, | |
57 | s->nr_ret, | |
58 | s->parm[0], s->parm[1], s->parm[2], | |
59 | s->parm[3], s->parm[4], s->parm[5]); | |
2dd14934 AB |
60 | |
61 | return syscall(s->parm[0], s->parm[1], s->parm[2], | |
62 | s->parm[3], s->parm[4], s->parm[5]); | |
63 | } | |
64 | EXPORT_SYMBOL_GPL(spu_sys_callback); |