src/afs/LINUX/osi_syscall.c

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 /*
  11  * Linux module support routines.
  12  *
  13  */
  14 #include <afsconfig.h>
  15 #include "afs/param.h"
  16
  17
  18 #include <linux/module.h> /* early to avoid printf->printk mapping */
  19 #include "afs/sysincludes.h"
  20 #include "afsincludes.h"
  21 #include <linux/unistd.h>               /* For syscall numbers. */
  22 #include <linux/mm.h>
  23
  24 #ifdef AFS_AMD64_LINUX20_ENV
  25 #include <asm/ia32_unistd.h>
  26 #endif
  27
  28 #include <linux/proc_fs.h>
  29 #include <linux/slab.h>
  30 #include <linux/init.h>
  31 #include <linux/sched.h>
  32
  33 #ifndef NR_syscalls
  34 #define NR_syscalls 222
  35 #endif
  36
  37 /* On SPARC64 and S390X, sys_call_table contains 32-bit entries
  38  * even though pointers are 64 bit quantities.
  39  * XXX unify this with osi_probe.c
  40  */
  41 #if defined(AFS_SPARC64_LINUX20_ENV) || defined(AFS_S390X_LINUX24_ENV)
  42 #define SYSCALLTYPE unsigned int
  43 #define POINTER2SYSCALL (unsigned int)(unsigned long)
  44 #define SYSCALL2POINTER (void *)(long)
  45 #else
  46 #define SYSCALLTYPE void *
  47 #define POINTER2SYSCALL (void *)
  48 #define SYSCALL2POINTER (void *)
  49 #endif
  50
  51 #if defined(AFS_S390X_LINUX24_ENV)
  52 #define INSERT_SYSCALL(SLOT, TMPPAGE, FUNC) \
  53         if (SYSCALL2POINTER FUNC > 0x7fffffff) { \
  54             TMPPAGE = kmalloc ( PAGE_SIZE, GFP_DMA|GFP_KERNEL );        \
  55             if (SYSCALL2POINTER TMPPAGE > 0x7fffffff) { \
  56                 printf("Cannot allocate page for FUNC syscall jump vector\n"); \
  57                 return EINVAL; \
  58             } \
  59             memcpy(TMPPAGE, syscall_jump_code, sizeof(syscall_jump_code)); \
  60             *(void **)(TMPPAGE + 0x0c) = &FUNC; \
  61             afs_sys_call_table[_S(SLOT)] = POINTER2SYSCALL TMPPAGE; \
  62         } else \
  63             afs_sys_call_table[_S(SLOT)] = POINTER2SYSCALL FUNC;
  64 #else
  65 #define INSERT_SYSCALL(SLOT, TMPPAGE, FUNC) \
  66     afs_sys_call_table[_S(SLOT)] = POINTER2SYSCALL FUNC;
  67 #endif
  68
  69 #if defined(AFS_IA64_LINUX20_ENV)
  70 #define _S(x) ((x)-1024)
  71 #else
  72 #define _S(x) x
  73 #endif
  74
  75
  76 /***** ALL PLATFORMS *****/
  77 extern asmlinkage long
  78 afs_syscall(long syscall, long parm1, long parm2, long parm3, long parm4);
  79
  80 static SYSCALLTYPE *afs_sys_call_table;
  81 static SYSCALLTYPE afs_ni_syscall = 0;
  82
  83 #ifdef AFS_S390X_LINUX24_ENV
  84 static void *afs_sys_setgroups_page = 0;
  85 static void *afs_sys_setgroups32_page = 0;
  86 static void *afs_syscall_page = 0;
  87
  88 /* Because of how the syscall table is handled, we need to ensure our
  89    syscalls are within the first 2gb of address space. This means we need
  90    self-modifying code we can inject to call our handlers if the module
  91    is loaded high. If keyrings had advanced as fast as false protection
  92    this would be unnecessary. */
  93
  94 uint32_t syscall_jump_code[] = {
  95   0xe3d0f030, 0x00240dd0, 0xa7f40006, 0xffffffff, 0xffffffff, 0xe310d004,
  96   0x0004e3d0, 0xf0300004, 0x07f10000,
  97 };
  98 #endif
  99
 100 extern long afs_xsetgroups(int gidsetsize, gid_t * grouplist);
 101 asmlinkage long (*sys_setgroupsp) (int gidsetsize, gid_t * grouplist);
 102
 103 extern int afs_xsetgroups32(int gidsetsize, gid_t * grouplist);
 104 asmlinkage int (*sys_setgroups32p) (int gidsetsize,
 105                                     __kernel_gid32_t * grouplist);
 106
 107 /***** AMD64 *****/
 108 #ifdef AFS_AMD64_LINUX20_ENV
 109 static SYSCALLTYPE *afs_ia32_sys_call_table;
 110 static SYSCALLTYPE ia32_ni_syscall = 0;
 111
 112 extern int afs32_xsetgroups();
 113 asmlinkage long (*sys32_setgroupsp) (int gidsetsize, u16 * grouplist);
 114 extern int afs32_xsetgroups32();
 115 asmlinkage long (*sys32_setgroups32p) (int gidsetsize, gid_t * grouplist);
 116 #endif /* AFS_AMD64_LINUX20_ENV */
 117
 118
 119 /***** PPC64 *****/
 120 #ifdef AFS_PPC64_LINUX26_ENV
 121 static SYSCALLTYPE *afs_sys_call_table32;
 122 static SYSCALLTYPE afs_ni_syscall32 = 0;
 123 static SYSCALLTYPE old_sys_setgroupsp = 0;
 124 static SYSCALLTYPE old_sys32_setgroupsp = 0;
 125
 126 extern int afs32_xsetgroups();
 127 asmlinkage long (*sys32_setgroupsp)(int gidsetsize, gid_t *grouplist);
 128
 129 asmlinkage long sys_close(unsigned int fd);
 130 static void sys_setgroups_stub()
 131         __attribute__ ((pure,const,no_instrument_function));
 132 static void sys_setgroups_stub()
 133 {
 134         printf("*** error! sys_setgroups_stub called\n");
 135 }
 136
 137 static void sys32_setgroups_stub()
 138         __attribute__ ((pure,const,no_instrument_function));
 139 static void sys32_setgroups_stub()
 140 {
 141         printf("*** error! sys32_setgroups_stub called\n");
 142 }
 143
 144 #endif /* AFS_PPC64_LINUX26_ENV */
 145
 146
 147 /***** SPARC64 *****/
 148 #ifdef AFS_SPARC64_LINUX26_ENV
 149 static SYSCALLTYPE *afs_sys_call_table32;
 150 static SYSCALLTYPE afs_ni_syscall32 = 0;
 151
 152 extern int afs32_xsetgroups();
 153 asmlinkage int (*sys32_setgroupsp) (int gidsetsize,
 154                                     __kernel_gid32_t * grouplist);
 155 /* This number is not exported for some bizarre reason. */
 156 #define __NR_setgroups32      82
 157 extern int afs32_xsetgroups32();
 158 asmlinkage int (*sys32_setgroups32p) (int gidsetsize,
 159                                       __kernel_gid32_t * grouplist);
 160
 161 asmlinkage int
 162 afs_syscall32(long syscall, long parm1, long parm2, long parm3, long parm4,
 163               long parm5)
 164 {
 165     __asm__ __volatile__("srl %o4, 0, %o4\n\t"
 166                          "mov %o7, %i7\n\t"
 167                          "call afs_syscall\n\t"
 168                          "srl %o5, 0, %o5\n\t"
 169                          "ret\n\t"
 170                          "nop");
 171 }
 172 #endif /* AFS_SPARC64_LINUX20_ENV */
 173
 174
 175 /***** IA64 *****/
 176 #ifdef AFS_IA64_LINUX20_ENV
 177
 178 asmlinkage long
 179 afs_syscall_stub(int r0, int r1, long r2, long r3, long r4, long gp)
 180 {
 181     __asm__ __volatile__("alloc r42 = ar.pfs, 8, 3, 6, 0\n\t"
 182                          "mov r41 = b0\n\t"     /* save rp */
 183                          "mov out0 = in0\n\t"
 184                          "mov out1 = in1\n\t"
 185                          "mov out2 = in2\n\t"
 186                          "mov out3 = in3\n\t"
 187                          "mov out4 = in4\n\t"
 188                          "mov out5 = gp\n\t"    /* save gp */
 189                          ";;\n"
 190                          ".L1:\n\t"
 191                          "mov r3 = ip\n\t"
 192                          ";;\n\t"
 193                          "addl r15=.fptr_afs_syscall-.L1,r3\n\t"
 194                          ";;\n\t"
 195                          "ld8 r15=[r15]\n\t"
 196                          ";;\n\t"
 197                          "ld8 r16=[r15],8\n\t"
 198                          ";;\n\t"
 199                          "ld8 gp=[r15]\n\t"
 200                          "mov b6=r16\n\t"
 201                          "br.call.sptk.many b0 = b6\n\t"
 202                          ";;\n\t"
 203                          "mov ar.pfs = r42\n\t"
 204                          "mov b0 = r41\n\t"
 205                          "mov gp = r48\n\t"     /* restore gp */
 206                          "br.ret.sptk.many b0\n"
 207                          ".fptr_afs_syscall:\n\t"
 208                          "data8 @fptr(afs_syscall)\n\t"
 209                          ".skip 8");
 210 }
 211
 212 asmlinkage long
 213 afs_xsetgroups_stub(int r0, int r1, long r2, long r3, long r4, long gp)
 214 {
 215     __asm__ __volatile__("alloc r42 = ar.pfs, 8, 3, 6, 0\n\t"
 216                          "mov r41 = b0\n\t"     /* save rp */
 217                          "mov out0 = in0\n\t"
 218                          "mov out1 = in1\n\t"
 219                          "mov out2 = in2\n\t"
 220                          "mov out3 = in3\n\t"
 221                          "mov out4 = in4\n\t"
 222                          "mov out5 = gp\n\t"    /* save gp */
 223                          ";;\n"
 224                          ".L2:\n\t"
 225                          "mov r3 = ip\n\t"
 226                          ";;\n\t"
 227                          "addl r15=.fptr_afs_xsetgroups - .L2,r3\n\t"
 228                          ";;\n\t"
 229                          "ld8 r15=[r15]\n\t"
 230                          ";;\n\t"
 231                          "ld8 r16=[r15],8\n\t"
 232                          ";;\n\t"
 233                          "ld8 gp=[r15]\n\t"
 234                          "mov b6=r16\n\t"
 235                          "br.call.sptk.many b0 = b6\n\t"
 236                          ";;\n\t"
 237                          "mov ar.pfs = r42\n\t"
 238                          "mov b0 = r41\n\t"
 239                          "mov gp = r48\n\t"     /* restore gp */
 240                          "br.ret.sptk.many b0\n"
 241                          ".fptr_afs_xsetgroups:\n\t"
 242                          "data8 @fptr(afs_xsetgroups)\n\t"
 243                          ".skip 8");
 244 }
 245
 246 struct fptr {
 247     void *ip;
 248     unsigned long gp;
 249 };
 250
 251 #endif /* AFS_IA64_LINUX20_ENV */
 252
 253 /***** PPC64 *****
 254  * Spring 2005
 255  * sys_call_table hook for PPC64
 256  * by Soewono Effendi <Soewono.Effendi@sysgo.de>
 257  * for IBM Deutschland
 258  * Thanks go to SYSGO's team for their support:
 259  * Horst Birthelmer <Horst.Birthelmer@sysgo.de>
 260  * Marius Groeger <Marius.Groeger@sysgo.de>
 261  */
 262 #if defined(AFS_PPC64_LINUX26_ENV)
 263 extern void flush_cache(void *, unsigned long);
 264 #define PPC_LO(v) ((v) & 0xffff)
 265 #define PPC_HI(v) (((v) >> 16) & 0xffff)
 266 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
 267 #define PPC_HLO(v) ((short)(((v) >> 32) & 0xffff))
 268 #define PPC_HHI(v) ((short)(((v) >> 48) & 0xffff))
 269
 270 struct ppc64_opd
 271 {
 272         unsigned long funcaddr;
 273         unsigned long r2;
 274 };
 275
 276 struct ppc64_stub
 277 {
 278         unsigned char jump[136];
 279         unsigned long r2;
 280         unsigned long lr;
 281         struct ppc64_opd opd;
 282 } __attribute__ ((packed));
 283
 284 /* a stub to fix up r2 (TOC ptr) and to jump to our sys_call hook
 285    function.  We patch the new r2 value and function pointer into
 286    the stub. */
 287 #define PPC64_STUB(stub) \
 288 static struct ppc64_stub stub = \
 289 { .jump = { \
 290         0xf8, 0x41, 0x00, 0x28, /*     std     r2,40(r1) */ \
 291         0xfb, 0xc1, 0xff, 0xf0, /*     std     r30,-16(r1) */ \
 292         0xfb, 0xa1, 0xff, 0xe8, /*     std     r29,-24(r1) */ \
 293         0x7c, 0x5d, 0x13, 0x78, /*     mr      r29,r2 */ \
 294         0x3c, 0x40, 0x12, 0x34, /*16:  lis     r2,4660 */ \
 295         0x60, 0x42, 0x56, 0x78, /*20:  ori     r2,r2,22136 */ \
 296         0x78, 0x42, 0x07, 0xc6, /*     rldicr  r2,r2,32,31 */ \
 297         0x64, 0x42, 0x90, 0xab, /*28:  oris    r2,r2,37035 */ \
 298         0x60, 0x42, 0xcd, 0xef, /*32:  ori     r2,r2,52719 */ \
 299         0x3f, 0xc2, 0x00, 0x00, /*36:  addis   r30,r2,0 */ \
 300         0x3b, 0xde, 0x00, 0x00, /*40:  addi    r30,r30,0 */ \
 301         0xfb, 0xbe, 0x00, 0x88, /*     std     r29,136(r30) */ \
 302         0x7f, 0xa8, 0x02, 0xa6, /*     mflr    r29 */ \
 303         0xfb, 0xbe, 0x00, 0x90, /*     std     r29,144(r30) */ \
 304         0xeb, 0xde, 0x00, 0x98, /*     ld      r30,152(r30) */ \
 305         0x7f, 0xc8, 0x03, 0xa6, /*     mtlr    r30 */ \
 306         0xeb, 0xa1, 0xff, 0xe8, /*     ld      r29,-24(r1) */ \
 307         0xeb, 0xc1, 0xff, 0xf0, /*     ld      r30,-16(r1) */ \
 308         0x4e, 0x80, 0x00, 0x21, /*     blrl */ \
 309         0x3c, 0x40, 0x12, 0x34, /*76:  lis     r2,4660 */ \
 310         0x60, 0x42, 0x56, 0x78, /*80:  ori     r2,r2,22136 */ \
 311         0x78, 0x42, 0x07, 0xc6, /*     rldicr  r2,r2,32,31 */ \
 312         0x64, 0x42, 0x90, 0xab, /*88:  oris    r2,r2,37035 */ \
 313         0x60, 0x42, 0xcd, 0xef, /*92:  ori     r2,r2,52719 */ \
 314         0xfb, 0xc1, 0xff, 0xf0, /*     std     r30,-16(r1) */ \
 315         0xfb, 0xa1, 0xff, 0xe8, /*     std     r29,-24(r1) */ \
 316         0x3f, 0xc2, 0xab, 0xcd, /*104: addis   r30,r2,-21555 */ \
 317         0x3b, 0xde, 0x78, 0x90, /*108: addi    r30,r30,30864 */ \
 318         0xeb, 0xbe, 0x00, 0x90, /*     ld      r29,144(r30) */ \
 319         0x7f, 0xa8, 0x03, 0xa6, /*     mtlr    r29 */ \
 320         0xe8, 0x5e, 0x00, 0x88, /*     ld      r2,136(r30) */ \
 321         0xeb, 0xa1, 0xff, 0xe8, /*     ld      r29,-24(r1) */ \
 322         0xeb, 0xc1, 0xff, 0xf0, /*     ld      r30,-16(r1) */ \
 323         0x4e, 0x80, 0x00, 0x20  /*     blr */ \
 324 }}
 325
 326 static void * create_stub(struct ppc64_stub *stub,
 327                           struct ppc64_opd *opd)
 328 {
 329         unsigned short *p1, *p2, *p3, *p4;
 330         unsigned long addr;
 331
 332         stub->opd.funcaddr = opd->funcaddr;
 333         stub->opd.r2 = opd->r2;
 334         addr = (unsigned long) opd->r2;
 335         p1 = (unsigned short*) &stub->jump[18];
 336         p2 = (unsigned short*) &stub->jump[22];
 337         p3 = (unsigned short*) &stub->jump[30];
 338         p4 = (unsigned short*) &stub->jump[34];
 339
 340         *p1 = PPC_HHI(addr);
 341         *p2 = PPC_HLO(addr);
 342         *p3 = PPC_HI(addr);
 343         *p4 = PPC_LO(addr);
 344
 345         addr = (unsigned long) stub - opd->r2;
 346         p1 = (unsigned short*) &stub->jump[38];
 347         p2 = (unsigned short*) &stub->jump[42];
 348         *p1 = PPC_HA(addr);
 349         *p2 = PPC_LO(addr);
 350         p1 = (unsigned short*) &stub->jump[106];
 351         p2 = (unsigned short*) &stub->jump[110];
 352         *p1 = PPC_HA(addr);
 353         *p2 = PPC_LO(addr);
 354
 355         addr = (unsigned long) opd->r2;
 356         p1 = (unsigned short*) &stub->jump[78];
 357         p2 = (unsigned short*) &stub->jump[82];
 358         p3 = (unsigned short*) &stub->jump[90];
 359         p4 = (unsigned short*) &stub->jump[94];
 360
 361         *p1 = PPC_HHI(addr);
 362         *p2 = PPC_HLO(addr);
 363         *p3 = PPC_HI(addr);
 364         *p4 = PPC_LO(addr);
 365
 366         flush_cache((void *)stub, sizeof(*stub));
 367         return ((void*)(stub));
 368 }
 369
 370 PPC64_STUB(afs_sys_call_stub);
 371 PPC64_STUB(afs_xsetgroups_stub);
 372 PPC64_STUB(afs_xsetgroups32_stub);
 373 #endif /* AFS_PPC64_LINUX26_ENV */
 374
 375
 376 /**********************************************************************/
 377 /********************* System Call Initialization *********************/
 378 /**********************************************************************/
 379
 380 int osi_syscall_init(void)
 381 {
 382 /***** IA64 *****/
 383 #ifdef AFS_IA64_LINUX20_ENV
 384     /* This needs to be first because we are declaring variables, and
 385      * also because the handling of syscall pointers is bizarre enough
 386      * that we want to special-case even the "common" part.
 387      */
 388     unsigned long kernel_gp = 0;
 389     static struct fptr sys_setgroups;
 390
 391     afs_sys_call_table = osi_find_syscall_table(0);
 392     if (afs_sys_call_table) {
 393
 394         /* check we aren't already loaded */
 395         /* XXX this can't be right */
 396         if (SYSCALL2POINTER afs_sys_call_table[_S(__NR_afs_syscall)]
 397             == afs_syscall) {
 398             printf("AFS syscall entry point already in use!\n");
 399             return -EBUSY;
 400         }
 401
 402         /* setup AFS entry point */
 403         afs_ni_syscall = afs_sys_call_table[_S(__NR_afs_syscall)];
 404         afs_sys_call_table[_S(__NR_afs_syscall)] =
 405                 POINTER2SYSCALL((struct fptr *)afs_syscall_stub)->ip;
 406
 407         /* setup setgroups */
 408         sys_setgroupsp = (void *)&sys_setgroups;
 409
 410         ((struct fptr *)sys_setgroupsp)->ip =
 411             SYSCALL2POINTER afs_sys_call_table[_S(__NR_setgroups)];
 412         ((struct fptr *)sys_setgroupsp)->gp = kernel_gp;
 413
 414         afs_sys_call_table[_S(__NR_setgroups)] =
 415             POINTER2SYSCALL((struct fptr *)afs_xsetgroups_stub)->ip;
 416     }
 417
 418     /* XXX no 32-bit syscalls on IA64? */
 419
 420
 421 #elif defined(AFS_PPC64_LINUX26_ENV)
 422
 423     afs_sys_call_table = osi_find_syscall_table(0);
 424     if (afs_sys_call_table) {
 425         SYSCALLTYPE p;
 426         struct ppc64_opd* opd = (struct ppc64_opd*) sys_close;
 427         unsigned long r2 = opd->r2;
 428         opd = (struct ppc64_opd*) afs_syscall;
 429         afs_sys_call_table32 = (unsigned long)afs_sys_call_table -
 430                 NR_syscalls * sizeof(SYSCALLTYPE);
 431         /* check we aren't already loaded */
 432         p = SYSCALL2POINTER afs_sys_call_table[_S(__NR_afs_syscall)];
 433         if ((unsigned long)p == opd->funcaddr) {
 434             printf("AFS syscall entry point already in use!\n");
 435             return -EBUSY;
 436         }
 437         /* setup AFS entry point */
 438         p = create_stub(&afs_sys_call_stub, opd);
 439         afs_ni_syscall = afs_sys_call_table[_S(__NR_afs_syscall)];
 440         afs_sys_call_table[_S(__NR_afs_syscall)] = POINTER2SYSCALL p;
 441
 442         /* setup setgroups */
 443         opd = (struct ppc64_opd*) afs_xsetgroups;
 444         p = create_stub(&afs_xsetgroups_stub, opd);
 445         old_sys_setgroupsp = SYSCALL2POINTER afs_sys_call_table[_S(__NR_setgroups)];
 446         afs_sys_call_table[_S(__NR_setgroups)] = POINTER2SYSCALL p;
 447         opd = (struct ppc64_opd*) sys_setgroups_stub;
 448         opd->funcaddr = old_sys_setgroupsp;
 449         opd->r2 = r2;
 450
 451         /* setup setgroups32 */
 452         opd = (struct ppc64_opd*) afs32_xsetgroups;
 453         p = create_stub(&afs_xsetgroups32_stub, opd);
 454         old_sys32_setgroupsp = SYSCALL2POINTER afs_sys_call_table32[_S(__NR_setgroups)];
 455         afs_sys_call_table32[_S(__NR_setgroups)] = POINTER2SYSCALL p;
 456         opd = (struct ppc64_opd*) sys32_setgroups_stub;
 457         opd->funcaddr = old_sys32_setgroupsp;
 458         opd->r2 = r2;
 459
 460         flush_cache((void *)afs_sys_call_table, 2*NR_syscalls*sizeof(void*));
 461
 462         sys_setgroupsp = sys_setgroups_stub;
 463         sys32_setgroupsp = sys32_setgroups_stub;
 464     }
 465 /***** COMMON (except IA64 or PPC64) *****/
 466 #else /* !AFS_IA64_LINUX20_ENV */
 467
 468     afs_sys_call_table = osi_find_syscall_table(0);
 469     if (afs_sys_call_table) {
 470
 471         /* check we aren't already loaded */
 472         if (SYSCALL2POINTER afs_sys_call_table[_S(__NR_afs_syscall)]
 473             == afs_syscall) {
 474             printf("AFS syscall entry point already in use!\n");
 475             return -EBUSY;
 476         }
 477
 478         /* setup AFS entry point */
 479         afs_ni_syscall = afs_sys_call_table[_S(__NR_afs_syscall)];
 480
 481         INSERT_SYSCALL(__NR_afs_syscall, afs_syscall_page, afs_syscall)
 482
 483         /* setup setgroups */
 484         sys_setgroupsp = SYSCALL2POINTER afs_sys_call_table[_S(__NR_setgroups)];
 485         INSERT_SYSCALL(__NR_setgroups, afs_sys_setgroups_page, afs_xsetgroups)
 486
 487 #if defined(__NR_setgroups32)
 488         /* setup setgroups32 */
 489         sys_setgroups32p = SYSCALL2POINTER afs_sys_call_table[__NR_setgroups32];
 490         INSERT_SYSCALL(__NR_setgroups32, afs_sys_setgroups32_page, afs_xsetgroups32)
 491 #endif
 492     }
 493 #endif /* !AFS_IA64_LINUX20_ENV */
 494
 495
 496 /***** AMD64 *****/
 497 #ifdef AFS_AMD64_LINUX20_ENV
 498     afs_ia32_sys_call_table = osi_find_syscall_table(1);
 499     if (afs_ia32_sys_call_table) {
 500         /* setup AFS entry point for IA32 */
 501         ia32_ni_syscall = afs_ia32_sys_call_table[__NR_ia32_afs_syscall];
 502         afs_ia32_sys_call_table[__NR_ia32_afs_syscall] =
 503             POINTER2SYSCALL afs_syscall;
 504
 505         /* setup setgroups for IA32 */
 506         sys32_setgroupsp =
 507             SYSCALL2POINTER afs_ia32_sys_call_table[__NR_ia32_setgroups];
 508         afs_ia32_sys_call_table[__NR_ia32_setgroups] =
 509             POINTER2SYSCALL afs32_xsetgroups;
 510
 511         /* setup setgroups32 for IA32 */
 512         sys32_setgroups32p =
 513             SYSCALL2POINTER afs_ia32_sys_call_table[__NR_ia32_setgroups32];
 514         afs_ia32_sys_call_table[__NR_ia32_setgroups32] =
 515             POINTER2SYSCALL afs32_xsetgroups32;
 516     }
 517 #endif /* AFS_AMD64_LINUX20_ENV */
 518
 519
 520 /***** SPARC64 *****/
 521 #ifdef AFS_SPARC64_LINUX20_ENV
 522     afs_sys_call_table32 = osi_find_syscall_table(1);
 523     if (afs_sys_call_table32) {
 524         /* setup AFS entry point for 32-bit SPARC */
 525         afs_ni_syscall32 = afs_sys_call_table32[__NR_afs_syscall];
 526         afs_sys_call_table32[__NR_afs_syscall] = POINTER2SYSCALL afs_syscall32;
 527
 528         /* setup setgroups for 32-bit SPARC */
 529         sys32_setgroupsp = SYSCALL2POINTER afs_sys_call_table32[__NR_setgroups];
 530         afs_sys_call_table32[__NR_setgroups] = POINTER2SYSCALL afs32_xsetgroups;
 531
 532         /* setup setgroups32 for 32-bit SPARC */
 533         sys32_setgroups32p =
 534             SYSCALL2POINTER afs_sys_call_table32[__NR_setgroups32];
 535         afs_sys_call_table32[__NR_setgroups32] =
 536             POINTER2SYSCALL afs32_xsetgroups32;
 537     }
 538 #endif /* AFS_SPARC64_LINUX20_ENV */
 539     return 0;
 540 }
 541
 542
 543
 544 /**********************************************************************/
 545 /************************ System Call Cleanup *************************/
 546 /**********************************************************************/
 547
 548 void osi_syscall_clean(void)
 549 {
 550 /***** COMMON *****/
 551     if (afs_sys_call_table) {
 552         /* put back the AFS entry point */
 553         afs_sys_call_table[_S(__NR_afs_syscall)] = afs_ni_syscall;
 554
 555         /* put back setgroups */
 556 #if defined(AFS_IA64_LINUX20_ENV)
 557         afs_sys_call_table[_S(__NR_setgroups)] =
 558             POINTER2SYSCALL((struct fptr *)sys_setgroupsp)->ip;
 559 #elif defined(AFS_PPC64_LINUX26_ENV)
 560         afs_sys_call_table[_S(__NR_setgroups)] =
 561             POINTER2SYSCALL old_sys_setgroupsp;
 562         /* put back setgroups32 for PPC64 */
 563         afs_sys_call_table32[__NR_setgroups] =
 564             POINTER2SYSCALL old_sys32_setgroupsp;
 565 #else /* AFS_IA64_LINUX20_ENV */
 566         afs_sys_call_table[_S(__NR_setgroups)] =
 567             POINTER2SYSCALL sys_setgroupsp;
 568 #endif
 569
 570 #if defined(__NR_setgroups32) && !defined(AFS_IA64_LINUX20_ENV)
 571         /* put back setgroups32 */
 572         afs_sys_call_table[__NR_setgroups32] = POINTER2SYSCALL sys_setgroups32p;
 573 #endif
 574 #if defined(AFS_S390X_LINUX24_ENV)
 575 #if defined(__NR_setgroups32) && !defined(AFS_IA64_LINUX20_ENV)
 576         if (afs_sys_setgroups32_page)
 577             kfree(afs_sys_setgroups32_page);
 578 #endif
 579         if (afs_sys_setgroups_page)
 580             kfree(afs_sys_setgroups_page);
 581         if (afs_syscall_page)
 582             kfree(afs_syscall_page);
 583 #endif
 584     }
 585
 586
 587 /***** IA64 *****/
 588 #ifdef AFS_IA64_LINUX20_ENV
 589     /* XXX no 32-bit syscalls on IA64? */
 590 #endif
 591
 592
 593 /***** AMD64 *****/
 594 #ifdef AFS_AMD64_LINUX20_ENV
 595     if (afs_ia32_sys_call_table) {
 596         /* put back AFS entry point for IA32 */
 597         afs_ia32_sys_call_table[__NR_ia32_afs_syscall] =
 598             POINTER2SYSCALL ia32_ni_syscall;
 599
 600         /* put back setgroups for IA32 */
 601         afs_ia32_sys_call_table[__NR_ia32_setgroups] =
 602             POINTER2SYSCALL sys32_setgroupsp;
 603
 604         /* put back setgroups32 for IA32 */
 605         afs_ia32_sys_call_table[__NR_ia32_setgroups32] =
 606             POINTER2SYSCALL sys32_setgroups32p;
 607     }
 608 #endif
 609
 610
 611 /***** SPARC64 *****/
 612 #ifdef AFS_SPARC64_LINUX20_ENV
 613     if (afs_sys_call_table32) {
 614         /* put back AFS entry point for 32-bit SPARC */
 615         afs_sys_call_table32[__NR_afs_syscall] = afs_ni_syscall32;
 616
 617         /* put back setgroups for IA32 */
 618         afs_sys_call_table32[__NR_setgroups] =
 619             POINTER2SYSCALL sys32_setgroupsp;
 620
 621         /* put back setgroups32 for IA32 */
 622         afs_sys_call_table32[__NR_setgroups32] =
 623             POINTER2SYSCALL sys32_setgroups32p;
 624     }
 625 #endif
 626 }