1/* 2 * System call callback functions for SPUs 3 */ 4 5#define DEBUG 6 7#include <linux/kallsyms.h> 8#include <linux/module.h> 9#include <linux/syscalls.h> 10 11#include <asm/spu.h> 12#include <asm/syscalls.h> 13#include <asm/unistd.h> 14 15/* 16 * This table defines the system calls that an SPU can call. 17 * It is currently a subset of the 64 bit powerpc system calls, 18 * with the exact semantics. 19 * 20 * The reasons for disabling some of the system calls are: 21 * 1. They interact with the way SPU syscalls are handled 22 * and we can't let them execute ever: 23 * restart_syscall, exit, for, execve, ptrace, ... 24 * 2. They are deprecated and replaced by other means: 25 * uselib, pciconfig_*, sysfs, ... 26 * 3. They are somewhat interacting with the system in a way 27 * we don't want an SPU to: 28 * reboot, init_module, mount, kexec_load 29 * 4. They are optional and we can't rely on them being 30 * linked into the kernel. Unfortunately, the cond_syscall 31 * helper does not work here as it does not add the necessary 32 * opd symbols: 33 * mbind, mq_open, ipc, ... 34 */ 35 36void *spu_syscall_table[] = { 37#define SYSCALL(func) sys_ni_syscall, 38#define COMPAT_SYS(func) sys_ni_syscall, 39#define PPC_SYS(func) sys_ni_syscall, 40#define OLDSYS(func) sys_ni_syscall, 41#define SYS32ONLY(func) sys_ni_syscall, 42#define SYSX(f, f3264, f32) sys_ni_syscall, 43 44#define SYSCALL_SPU(func) sys_##func, 45#define COMPAT_SYS_SPU(func) sys_##func, 46#define PPC_SYS_SPU(func) ppc_##func, 47#define SYSX_SPU(f, f3264, f32) f, 48 49#include <asm/systbl.h> 50}; 51 52long spu_sys_callback(struct spu_syscall_block *s) 53{ 54 long (*syscall)(u64 a1, u64 a2, u64 a3, u64 a4, u64 a5, u64 a6); 55 56 if (s->nr_ret >= ARRAY_SIZE(spu_syscall_table)) { 57 pr_debug("%s: invalid syscall #%ld", __FUNCTION__, s->nr_ret); 58 return -ENOSYS; 59 } 60 61 syscall = spu_syscall_table[s->nr_ret]; 62 63#ifdef DEBUG 64 print_symbol(KERN_DEBUG "SPU-syscall %s:", (unsigned long)syscall); 65 printk("syscall%ld(%lx, %lx, %lx, %lx, %lx, %lx)\n", 66 s->nr_ret, 67 s->parm[0], s->parm[1], s->parm[2], 68 s->parm[3], s->parm[4], s->parm[5]); 69#endif 70 71 return syscall(s->parm[0], s->parm[1], s->parm[2], 72 s->parm[3], s->parm[4], s->parm[5]); 73} 74EXPORT_SYMBOL_GPL(spu_sys_callback); 75