aboutsummaryrefslogtreecommitdiffstats
path: root/arch/ia64/kernel
diff options
context:
space:
mode:
authorTony Luck <tony.luck@intel.com>2008-04-17 13:12:44 -0400
committerTony Luck <tony.luck@intel.com>2008-04-17 13:12:44 -0400
commit78514c106b90b628a90c630a3bc87a6538aed865 (patch)
tree036842b87944acc80f1e455171396b70ae0f0c29 /arch/ia64/kernel
parent14d0647c98f52e2d76113d44de6b771ec87a934f (diff)
parent4cd8dc83581906948ff4cfa65007e64496b5a7c8 (diff)
Pull regset into release branch
Diffstat (limited to 'arch/ia64/kernel')
-rw-r--r--arch/ia64/kernel/process.c30
-rw-r--r--arch/ia64/kernel/ptrace.c1217
2 files changed, 895 insertions, 352 deletions
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 49937a383b23..a5ea817cbcbf 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -625,21 +625,6 @@ do_dump_fpu (struct unw_frame_info *info, void *arg)
625 do_dump_task_fpu(current, info, arg); 625 do_dump_task_fpu(current, info, arg);
626} 626}
627 627
628int
629dump_task_regs(struct task_struct *task, elf_gregset_t *regs)
630{
631 struct unw_frame_info tcore_info;
632
633 if (current == task) {
634 unw_init_running(do_copy_regs, regs);
635 } else {
636 memset(&tcore_info, 0, sizeof(tcore_info));
637 unw_init_from_blocked_task(&tcore_info, task);
638 do_copy_task_regs(task, &tcore_info, regs);
639 }
640 return 1;
641}
642
643void 628void
644ia64_elf_core_copy_regs (struct pt_regs *pt, elf_gregset_t dst) 629ia64_elf_core_copy_regs (struct pt_regs *pt, elf_gregset_t dst)
645{ 630{
@@ -647,21 +632,6 @@ ia64_elf_core_copy_regs (struct pt_regs *pt, elf_gregset_t dst)
647} 632}
648 633
649int 634int
650dump_task_fpu (struct task_struct *task, elf_fpregset_t *dst)
651{
652 struct unw_frame_info tcore_info;
653
654 if (current == task) {
655 unw_init_running(do_dump_fpu, dst);
656 } else {
657 memset(&tcore_info, 0, sizeof(tcore_info));
658 unw_init_from_blocked_task(&tcore_info, task);
659 do_dump_task_fpu(task, &tcore_info, dst);
660 }
661 return 1;
662}
663
664int
665dump_fpu (struct pt_regs *pt, elf_fpregset_t dst) 635dump_fpu (struct pt_regs *pt, elf_fpregset_t dst)
666{ 636{
667 unw_init_running(do_dump_fpu, dst); 637 unw_init_running(do_dump_fpu, dst);
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index ab784ec4319d..2a9943b5947f 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -3,6 +3,9 @@
3 * 3 *
4 * Copyright (C) 1999-2005 Hewlett-Packard Co 4 * Copyright (C) 1999-2005 Hewlett-Packard Co
5 * David Mosberger-Tang <davidm@hpl.hp.com> 5 * David Mosberger-Tang <davidm@hpl.hp.com>
6 * Copyright (C) 2006 Intel Co
7 * 2006-08-12 - IA64 Native Utrace implementation support added by
8 * Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
6 * 9 *
7 * Derived from the x86 and Alpha versions. 10 * Derived from the x86 and Alpha versions.
8 */ 11 */
@@ -17,6 +20,8 @@
17#include <linux/security.h> 20#include <linux/security.h>
18#include <linux/audit.h> 21#include <linux/audit.h>
19#include <linux/signal.h> 22#include <linux/signal.h>
23#include <linux/regset.h>
24#include <linux/elf.h>
20 25
21#include <asm/pgtable.h> 26#include <asm/pgtable.h>
22#include <asm/processor.h> 27#include <asm/processor.h>
@@ -740,25 +745,6 @@ ia64_sync_fph (struct task_struct *task)
740 psr->dfh = 1; 745 psr->dfh = 1;
741} 746}
742 747
743static int
744access_fr (struct unw_frame_info *info, int regnum, int hi,
745 unsigned long *data, int write_access)
746{
747 struct ia64_fpreg fpval;
748 int ret;
749
750 ret = unw_get_fr(info, regnum, &fpval);
751 if (ret < 0)
752 return ret;
753
754 if (write_access) {
755 fpval.u.bits[hi] = *data;
756 ret = unw_set_fr(info, regnum, fpval);
757 } else
758 *data = fpval.u.bits[hi];
759 return ret;
760}
761
762/* 748/*
763 * Change the machine-state of CHILD such that it will return via the normal 749 * Change the machine-state of CHILD such that it will return via the normal
764 * kernel exit-path, rather than the syscall-exit path. 750 * kernel exit-path, rather than the syscall-exit path.
@@ -860,309 +846,7 @@ access_nat_bits (struct task_struct *child, struct pt_regs *pt,
860 846
861static int 847static int
862access_uarea (struct task_struct *child, unsigned long addr, 848access_uarea (struct task_struct *child, unsigned long addr,
863 unsigned long *data, int write_access) 849 unsigned long *data, int write_access);
864{
865 unsigned long *ptr, regnum, urbs_end, cfm;
866 struct switch_stack *sw;
867 struct pt_regs *pt;
868# define pt_reg_addr(pt, reg) ((void *) \
869 ((unsigned long) (pt) \
870 + offsetof(struct pt_regs, reg)))
871
872
873 pt = task_pt_regs(child);
874 sw = (struct switch_stack *) (child->thread.ksp + 16);
875
876 if ((addr & 0x7) != 0) {
877 dprintk("ptrace: unaligned register address 0x%lx\n", addr);
878 return -1;
879 }
880
881 if (addr < PT_F127 + 16) {
882 /* accessing fph */
883 if (write_access)
884 ia64_sync_fph(child);
885 else
886 ia64_flush_fph(child);
887 ptr = (unsigned long *)
888 ((unsigned long) &child->thread.fph + addr);
889 } else if ((addr >= PT_F10) && (addr < PT_F11 + 16)) {
890 /* scratch registers untouched by kernel (saved in pt_regs) */
891 ptr = pt_reg_addr(pt, f10) + (addr - PT_F10);
892 } else if (addr >= PT_F12 && addr < PT_F15 + 16) {
893 /*
894 * Scratch registers untouched by kernel (saved in
895 * switch_stack).
896 */
897 ptr = (unsigned long *) ((long) sw
898 + (addr - PT_NAT_BITS - 32));
899 } else if (addr < PT_AR_LC + 8) {
900 /* preserved state: */
901 struct unw_frame_info info;
902 char nat = 0;
903 int ret;
904
905 unw_init_from_blocked_task(&info, child);
906 if (unw_unwind_to_user(&info) < 0)
907 return -1;
908
909 switch (addr) {
910 case PT_NAT_BITS:
911 return access_nat_bits(child, pt, &info,
912 data, write_access);
913
914 case PT_R4: case PT_R5: case PT_R6: case PT_R7:
915 if (write_access) {
916 /* read NaT bit first: */
917 unsigned long dummy;
918
919 ret = unw_get_gr(&info, (addr - PT_R4)/8 + 4,
920 &dummy, &nat);
921 if (ret < 0)
922 return ret;
923 }
924 return unw_access_gr(&info, (addr - PT_R4)/8 + 4, data,
925 &nat, write_access);
926
927 case PT_B1: case PT_B2: case PT_B3:
928 case PT_B4: case PT_B5:
929 return unw_access_br(&info, (addr - PT_B1)/8 + 1, data,
930 write_access);
931
932 case PT_AR_EC:
933 return unw_access_ar(&info, UNW_AR_EC, data,
934 write_access);
935
936 case PT_AR_LC:
937 return unw_access_ar(&info, UNW_AR_LC, data,
938 write_access);
939
940 default:
941 if (addr >= PT_F2 && addr < PT_F5 + 16)
942 return access_fr(&info, (addr - PT_F2)/16 + 2,
943 (addr & 8) != 0, data,
944 write_access);
945 else if (addr >= PT_F16 && addr < PT_F31 + 16)
946 return access_fr(&info,
947 (addr - PT_F16)/16 + 16,
948 (addr & 8) != 0,
949 data, write_access);
950 else {
951 dprintk("ptrace: rejecting access to register "
952 "address 0x%lx\n", addr);
953 return -1;
954 }
955 }
956 } else if (addr < PT_F9+16) {
957 /* scratch state */
958 switch (addr) {
959 case PT_AR_BSP:
960 /*
961 * By convention, we use PT_AR_BSP to refer to
962 * the end of the user-level backing store.
963 * Use ia64_rse_skip_regs(PT_AR_BSP, -CFM.sof)
964 * to get the real value of ar.bsp at the time
965 * the kernel was entered.
966 *
967 * Furthermore, when changing the contents of
968 * PT_AR_BSP (or PT_CFM) while the task is
969 * blocked in a system call, convert the state
970 * so that the non-system-call exit
971 * path is used. This ensures that the proper
972 * state will be picked up when resuming
973 * execution. However, it *also* means that
974 * once we write PT_AR_BSP/PT_CFM, it won't be
975 * possible to modify the syscall arguments of
976 * the pending system call any longer. This
977 * shouldn't be an issue because modifying
978 * PT_AR_BSP/PT_CFM generally implies that
979 * we're either abandoning the pending system
980 * call or that we defer it's re-execution
981 * (e.g., due to GDB doing an inferior
982 * function call).
983 */
984 urbs_end = ia64_get_user_rbs_end(child, pt, &cfm);
985 if (write_access) {
986 if (*data != urbs_end) {
987 if (in_syscall(pt))
988 convert_to_non_syscall(child,
989 pt,
990 cfm);
991 /*
992 * Simulate user-level write
993 * of ar.bsp:
994 */
995 pt->loadrs = 0;
996 pt->ar_bspstore = *data;
997 }
998 } else
999 *data = urbs_end;
1000 return 0;
1001
1002 case PT_CFM:
1003 urbs_end = ia64_get_user_rbs_end(child, pt, &cfm);
1004 if (write_access) {
1005 if (((cfm ^ *data) & PFM_MASK) != 0) {
1006 if (in_syscall(pt))
1007 convert_to_non_syscall(child,
1008 pt,
1009 cfm);
1010 pt->cr_ifs = ((pt->cr_ifs & ~PFM_MASK)
1011 | (*data & PFM_MASK));
1012 }
1013 } else
1014 *data = cfm;
1015 return 0;
1016
1017 case PT_CR_IPSR:
1018 if (write_access) {
1019 unsigned long tmp = *data;
1020 /* psr.ri==3 is a reserved value: SDM 2:25 */
1021 if ((tmp & IA64_PSR_RI) == IA64_PSR_RI)
1022 tmp &= ~IA64_PSR_RI;
1023 pt->cr_ipsr = ((tmp & IPSR_MASK)
1024 | (pt->cr_ipsr & ~IPSR_MASK));
1025 } else
1026 *data = (pt->cr_ipsr & IPSR_MASK);
1027 return 0;
1028
1029 case PT_AR_RSC:
1030 if (write_access)
1031 pt->ar_rsc = *data | (3 << 2); /* force PL3 */
1032 else
1033 *data = pt->ar_rsc;
1034 return 0;
1035
1036 case PT_AR_RNAT:
1037 ptr = pt_reg_addr(pt, ar_rnat);
1038 break;
1039 case PT_R1:
1040 ptr = pt_reg_addr(pt, r1);
1041 break;
1042 case PT_R2: case PT_R3:
1043 ptr = pt_reg_addr(pt, r2) + (addr - PT_R2);
1044 break;
1045 case PT_R8: case PT_R9: case PT_R10: case PT_R11:
1046 ptr = pt_reg_addr(pt, r8) + (addr - PT_R8);
1047 break;
1048 case PT_R12: case PT_R13:
1049 ptr = pt_reg_addr(pt, r12) + (addr - PT_R12);
1050 break;
1051 case PT_R14:
1052 ptr = pt_reg_addr(pt, r14);
1053 break;
1054 case PT_R15:
1055 ptr = pt_reg_addr(pt, r15);
1056 break;
1057 case PT_R16: case PT_R17: case PT_R18: case PT_R19:
1058 case PT_R20: case PT_R21: case PT_R22: case PT_R23:
1059 case PT_R24: case PT_R25: case PT_R26: case PT_R27:
1060 case PT_R28: case PT_R29: case PT_R30: case PT_R31:
1061 ptr = pt_reg_addr(pt, r16) + (addr - PT_R16);
1062 break;
1063 case PT_B0:
1064 ptr = pt_reg_addr(pt, b0);
1065 break;
1066 case PT_B6:
1067 ptr = pt_reg_addr(pt, b6);
1068 break;
1069 case PT_B7:
1070 ptr = pt_reg_addr(pt, b7);
1071 break;
1072 case PT_F6: case PT_F6+8: case PT_F7: case PT_F7+8:
1073 case PT_F8: case PT_F8+8: case PT_F9: case PT_F9+8:
1074 ptr = pt_reg_addr(pt, f6) + (addr - PT_F6);
1075 break;
1076 case PT_AR_BSPSTORE:
1077 ptr = pt_reg_addr(pt, ar_bspstore);
1078 break;
1079 case PT_AR_UNAT:
1080 ptr = pt_reg_addr(pt, ar_unat);
1081 break;
1082 case PT_AR_PFS:
1083 ptr = pt_reg_addr(pt, ar_pfs);
1084 break;
1085 case PT_AR_CCV:
1086 ptr = pt_reg_addr(pt, ar_ccv);
1087 break;
1088 case PT_AR_FPSR:
1089 ptr = pt_reg_addr(pt, ar_fpsr);
1090 break;
1091 case PT_CR_IIP:
1092 ptr = pt_reg_addr(pt, cr_iip);
1093 break;
1094 case PT_PR:
1095 ptr = pt_reg_addr(pt, pr);
1096 break;
1097 /* scratch register */
1098
1099 default:
1100 /* disallow accessing anything else... */
1101 dprintk("ptrace: rejecting access to register "
1102 "address 0x%lx\n", addr);
1103 return -1;
1104 }
1105 } else if (addr <= PT_AR_SSD) {
1106 ptr = pt_reg_addr(pt, ar_csd) + (addr - PT_AR_CSD);
1107 } else {
1108 /* access debug registers */
1109
1110 if (addr >= PT_IBR) {
1111 regnum = (addr - PT_IBR) >> 3;
1112 ptr = &child->thread.ibr[0];
1113 } else {
1114 regnum = (addr - PT_DBR) >> 3;
1115 ptr = &child->thread.dbr[0];
1116 }
1117
1118 if (regnum >= 8) {
1119 dprintk("ptrace: rejecting access to register "
1120 "address 0x%lx\n", addr);
1121 return -1;
1122 }
1123#ifdef CONFIG_PERFMON
1124 /*
1125 * Check if debug registers are used by perfmon. This
1126 * test must be done once we know that we can do the
1127 * operation, i.e. the arguments are all valid, but
1128 * before we start modifying the state.
1129 *
1130 * Perfmon needs to keep a count of how many processes
1131 * are trying to modify the debug registers for system
1132 * wide monitoring sessions.
1133 *
1134 * We also include read access here, because they may
1135 * cause the PMU-installed debug register state
1136 * (dbr[], ibr[]) to be reset. The two arrays are also
1137 * used by perfmon, but we do not use
1138 * IA64_THREAD_DBG_VALID. The registers are restored
1139 * by the PMU context switch code.
1140 */
1141 if (pfm_use_debug_registers(child)) return -1;
1142#endif
1143
1144 if (!(child->thread.flags & IA64_THREAD_DBG_VALID)) {
1145 child->thread.flags |= IA64_THREAD_DBG_VALID;
1146 memset(child->thread.dbr, 0,
1147 sizeof(child->thread.dbr));
1148 memset(child->thread.ibr, 0,
1149 sizeof(child->thread.ibr));
1150 }
1151
1152 ptr += regnum;
1153
1154 if ((regnum & 1) && write_access) {
1155 /* don't let the user set kernel-level breakpoints: */
1156 *ptr = *data & ~(7UL << 56);
1157 return 0;
1158 }
1159 }
1160 if (write_access)
1161 *ptr = *data;
1162 else
1163 *data = *ptr;
1164 return 0;
1165}
1166 850
1167static long 851static long
1168ptrace_getregs (struct task_struct *child, struct pt_all_user_regs __user *ppr) 852ptrace_getregs (struct task_struct *child, struct pt_all_user_regs __user *ppr)
@@ -1626,3 +1310,892 @@ syscall_trace_leave (long arg0, long arg1, long arg2, long arg3,
1626 if (test_thread_flag(TIF_RESTORE_RSE)) 1310 if (test_thread_flag(TIF_RESTORE_RSE))
1627 ia64_sync_krbs(); 1311 ia64_sync_krbs();
1628} 1312}
1313
1314/* Utrace implementation starts here */
1315struct regset_get {
1316 void *kbuf;
1317 void __user *ubuf;
1318};
1319
1320struct regset_set {
1321 const void *kbuf;
1322 const void __user *ubuf;
1323};
1324
1325struct regset_getset {
1326 struct task_struct *target;
1327 const struct user_regset *regset;
1328 union {
1329 struct regset_get get;
1330 struct regset_set set;
1331 } u;
1332 unsigned int pos;
1333 unsigned int count;
1334 int ret;
1335};
1336
1337static int
1338access_elf_gpreg(struct task_struct *target, struct unw_frame_info *info,
1339 unsigned long addr, unsigned long *data, int write_access)
1340{
1341 struct pt_regs *pt;
1342 unsigned long *ptr = NULL;
1343 int ret;
1344 char nat = 0;
1345
1346 pt = task_pt_regs(target);
1347 switch (addr) {
1348 case ELF_GR_OFFSET(1):
1349 ptr = &pt->r1;
1350 break;
1351 case ELF_GR_OFFSET(2):
1352 case ELF_GR_OFFSET(3):
1353 ptr = (void *)&pt->r2 + (addr - ELF_GR_OFFSET(2));
1354 break;
1355 case ELF_GR_OFFSET(4) ... ELF_GR_OFFSET(7):
1356 if (write_access) {
1357 /* read NaT bit first: */
1358 unsigned long dummy;
1359
1360 ret = unw_get_gr(info, addr/8, &dummy, &nat);
1361 if (ret < 0)
1362 return ret;
1363 }
1364 return unw_access_gr(info, addr/8, data, &nat, write_access);
1365 case ELF_GR_OFFSET(8) ... ELF_GR_OFFSET(11):
1366 ptr = (void *)&pt->r8 + addr - ELF_GR_OFFSET(8);
1367 break;
1368 case ELF_GR_OFFSET(12):
1369 case ELF_GR_OFFSET(13):
1370 ptr = (void *)&pt->r12 + addr - ELF_GR_OFFSET(12);
1371 break;
1372 case ELF_GR_OFFSET(14):
1373 ptr = &pt->r14;
1374 break;
1375 case ELF_GR_OFFSET(15):
1376 ptr = &pt->r15;
1377 }
1378 if (write_access)
1379 *ptr = *data;
1380 else
1381 *data = *ptr;
1382 return 0;
1383}
1384
1385static int
1386access_elf_breg(struct task_struct *target, struct unw_frame_info *info,
1387 unsigned long addr, unsigned long *data, int write_access)
1388{
1389 struct pt_regs *pt;
1390 unsigned long *ptr = NULL;
1391
1392 pt = task_pt_regs(target);
1393 switch (addr) {
1394 case ELF_BR_OFFSET(0):
1395 ptr = &pt->b0;
1396 break;
1397 case ELF_BR_OFFSET(1) ... ELF_BR_OFFSET(5):
1398 return unw_access_br(info, (addr - ELF_BR_OFFSET(0))/8,
1399 data, write_access);
1400 case ELF_BR_OFFSET(6):
1401 ptr = &pt->b6;
1402 break;
1403 case ELF_BR_OFFSET(7):
1404 ptr = &pt->b7;
1405 }
1406 if (write_access)
1407 *ptr = *data;
1408 else
1409 *data = *ptr;
1410 return 0;
1411}
1412
1413static int
1414access_elf_areg(struct task_struct *target, struct unw_frame_info *info,
1415 unsigned long addr, unsigned long *data, int write_access)
1416{
1417 struct pt_regs *pt;
1418 unsigned long cfm, urbs_end;
1419 unsigned long *ptr = NULL;
1420
1421 pt = task_pt_regs(target);
1422 if (addr >= ELF_AR_RSC_OFFSET && addr <= ELF_AR_SSD_OFFSET) {
1423 switch (addr) {
1424 case ELF_AR_RSC_OFFSET:
1425 /* force PL3 */
1426 if (write_access)
1427 pt->ar_rsc = *data | (3 << 2);
1428 else
1429 *data = pt->ar_rsc;
1430 return 0;
1431 case ELF_AR_BSP_OFFSET:
1432 /*
1433 * By convention, we use PT_AR_BSP to refer to
1434 * the end of the user-level backing store.
1435 * Use ia64_rse_skip_regs(PT_AR_BSP, -CFM.sof)
1436 * to get the real value of ar.bsp at the time
1437 * the kernel was entered.
1438 *
1439 * Furthermore, when changing the contents of
1440 * PT_AR_BSP (or PT_CFM) while the task is
1441 * blocked in a system call, convert the state
1442 * so that the non-system-call exit
1443 * path is used. This ensures that the proper
1444 * state will be picked up when resuming
1445 * execution. However, it *also* means that
1446 * once we write PT_AR_BSP/PT_CFM, it won't be
1447 * possible to modify the syscall arguments of
1448 * the pending system call any longer. This
1449 * shouldn't be an issue because modifying
1450 * PT_AR_BSP/PT_CFM generally implies that
1451 * we're either abandoning the pending system
1452 * call or that we defer it's re-execution
1453 * (e.g., due to GDB doing an inferior
1454 * function call).
1455 */
1456 urbs_end = ia64_get_user_rbs_end(target, pt, &cfm);
1457 if (write_access) {
1458 if (*data != urbs_end) {
1459 if (in_syscall(pt))
1460 convert_to_non_syscall(target,
1461 pt,
1462 cfm);
1463 /*
1464 * Simulate user-level write
1465 * of ar.bsp:
1466 */
1467 pt->loadrs = 0;
1468 pt->ar_bspstore = *data;
1469 }
1470 } else
1471 *data = urbs_end;
1472 return 0;
1473 case ELF_AR_BSPSTORE_OFFSET:
1474 ptr = &pt->ar_bspstore;
1475 break;
1476 case ELF_AR_RNAT_OFFSET:
1477 ptr = &pt->ar_rnat;
1478 break;
1479 case ELF_AR_CCV_OFFSET:
1480 ptr = &pt->ar_ccv;
1481 break;
1482 case ELF_AR_UNAT_OFFSET:
1483 ptr = &pt->ar_unat;
1484 break;
1485 case ELF_AR_FPSR_OFFSET:
1486 ptr = &pt->ar_fpsr;
1487 break;
1488 case ELF_AR_PFS_OFFSET:
1489 ptr = &pt->ar_pfs;
1490 break;
1491 case ELF_AR_LC_OFFSET:
1492 return unw_access_ar(info, UNW_AR_LC, data,
1493 write_access);
1494 case ELF_AR_EC_OFFSET:
1495 return unw_access_ar(info, UNW_AR_EC, data,
1496 write_access);
1497 case ELF_AR_CSD_OFFSET:
1498 ptr = &pt->ar_csd;
1499 break;
1500 case ELF_AR_SSD_OFFSET:
1501 ptr = &pt->ar_ssd;
1502 }
1503 } else if (addr >= ELF_CR_IIP_OFFSET && addr <= ELF_CR_IPSR_OFFSET) {
1504 switch (addr) {
1505 case ELF_CR_IIP_OFFSET:
1506 ptr = &pt->cr_iip;
1507 break;
1508 case ELF_CFM_OFFSET:
1509 urbs_end = ia64_get_user_rbs_end(target, pt, &cfm);
1510 if (write_access) {
1511 if (((cfm ^ *data) & PFM_MASK) != 0) {
1512 if (in_syscall(pt))
1513 convert_to_non_syscall(target,
1514 pt,
1515 cfm);
1516 pt->cr_ifs = ((pt->cr_ifs & ~PFM_MASK)
1517 | (*data & PFM_MASK));
1518 }
1519 } else
1520 *data = cfm;
1521 return 0;
1522 case ELF_CR_IPSR_OFFSET:
1523 if (write_access) {
1524 unsigned long tmp = *data;
1525 /* psr.ri==3 is a reserved value: SDM 2:25 */
1526 if ((tmp & IA64_PSR_RI) == IA64_PSR_RI)
1527 tmp &= ~IA64_PSR_RI;
1528 pt->cr_ipsr = ((tmp & IPSR_MASK)
1529 | (pt->cr_ipsr & ~IPSR_MASK));
1530 } else
1531 *data = (pt->cr_ipsr & IPSR_MASK);
1532 return 0;
1533 }
1534 } else if (addr == ELF_NAT_OFFSET)
1535 return access_nat_bits(target, pt, info,
1536 data, write_access);
1537 else if (addr == ELF_PR_OFFSET)
1538 ptr = &pt->pr;
1539 else
1540 return -1;
1541
1542 if (write_access)
1543 *ptr = *data;
1544 else
1545 *data = *ptr;
1546
1547 return 0;
1548}
1549
1550static int
1551access_elf_reg(struct task_struct *target, struct unw_frame_info *info,
1552 unsigned long addr, unsigned long *data, int write_access)
1553{
1554 if (addr >= ELF_GR_OFFSET(1) && addr <= ELF_GR_OFFSET(15))
1555 return access_elf_gpreg(target, info, addr, data, write_access);
1556 else if (addr >= ELF_BR_OFFSET(0) && addr <= ELF_BR_OFFSET(7))
1557 return access_elf_breg(target, info, addr, data, write_access);
1558 else
1559 return access_elf_areg(target, info, addr, data, write_access);
1560}
1561
1562void do_gpregs_get(struct unw_frame_info *info, void *arg)
1563{
1564 struct pt_regs *pt;
1565 struct regset_getset *dst = arg;
1566 elf_greg_t tmp[16];
1567 unsigned int i, index, min_copy;
1568
1569 if (unw_unwind_to_user(info) < 0)
1570 return;
1571
1572 /*
1573 * coredump format:
1574 * r0-r31
1575 * NaT bits (for r0-r31; bit N == 1 iff rN is a NaT)
1576 * predicate registers (p0-p63)
1577 * b0-b7
1578 * ip cfm user-mask
1579 * ar.rsc ar.bsp ar.bspstore ar.rnat
1580 * ar.ccv ar.unat ar.fpsr ar.pfs ar.lc ar.ec
1581 */
1582
1583
1584 /* Skip r0 */
1585 if (dst->count > 0 && dst->pos < ELF_GR_OFFSET(1)) {
1586 dst->ret = user_regset_copyout_zero(&dst->pos, &dst->count,
1587 &dst->u.get.kbuf,
1588 &dst->u.get.ubuf,
1589 0, ELF_GR_OFFSET(1));
1590 if (dst->ret || dst->count == 0)
1591 return;
1592 }
1593
1594 /* gr1 - gr15 */
1595 if (dst->count > 0 && dst->pos < ELF_GR_OFFSET(16)) {
1596 index = (dst->pos - ELF_GR_OFFSET(1)) / sizeof(elf_greg_t);
1597 min_copy = ELF_GR_OFFSET(16) > (dst->pos + dst->count) ?
1598 (dst->pos + dst->count) : ELF_GR_OFFSET(16);
1599 for (i = dst->pos; i < min_copy; i += sizeof(elf_greg_t),
1600 index++)
1601 if (access_elf_reg(dst->target, info, i,
1602 &tmp[index], 0) < 0) {
1603 dst->ret = -EIO;
1604 return;
1605 }
1606 dst->ret = user_regset_copyout(&dst->pos, &dst->count,
1607 &dst->u.get.kbuf, &dst->u.get.ubuf, tmp,
1608 ELF_GR_OFFSET(1), ELF_GR_OFFSET(16));
1609 if (dst->ret || dst->count == 0)
1610 return;
1611 }
1612
1613 /* r16-r31 */
1614 if (dst->count > 0 && dst->pos < ELF_NAT_OFFSET) {
1615 pt = task_pt_regs(dst->target);
1616 dst->ret = user_regset_copyout(&dst->pos, &dst->count,
1617 &dst->u.get.kbuf, &dst->u.get.ubuf, &pt->r16,
1618 ELF_GR_OFFSET(16), ELF_NAT_OFFSET);
1619 if (dst->ret || dst->count == 0)
1620 return;
1621 }
1622
1623 /* nat, pr, b0 - b7 */
1624 if (dst->count > 0 && dst->pos < ELF_CR_IIP_OFFSET) {
1625 index = (dst->pos - ELF_NAT_OFFSET) / sizeof(elf_greg_t);
1626 min_copy = ELF_CR_IIP_OFFSET > (dst->pos + dst->count) ?
1627 (dst->pos + dst->count) : ELF_CR_IIP_OFFSET;
1628 for (i = dst->pos; i < min_copy; i += sizeof(elf_greg_t),
1629 index++)
1630 if (access_elf_reg(dst->target, info, i,
1631 &tmp[index], 0) < 0) {
1632 dst->ret = -EIO;
1633 return;
1634 }
1635 dst->ret = user_regset_copyout(&dst->pos, &dst->count,
1636 &dst->u.get.kbuf, &dst->u.get.ubuf, tmp,
1637 ELF_NAT_OFFSET, ELF_CR_IIP_OFFSET);
1638 if (dst->ret || dst->count == 0)
1639 return;
1640 }
1641
1642 /* ip cfm psr ar.rsc ar.bsp ar.bspstore ar.rnat
1643 * ar.ccv ar.unat ar.fpsr ar.pfs ar.lc ar.ec ar.csd ar.ssd
1644 */
1645 if (dst->count > 0 && dst->pos < (ELF_AR_END_OFFSET)) {
1646 index = (dst->pos - ELF_CR_IIP_OFFSET) / sizeof(elf_greg_t);
1647 min_copy = ELF_AR_END_OFFSET > (dst->pos + dst->count) ?
1648 (dst->pos + dst->count) : ELF_AR_END_OFFSET;
1649 for (i = dst->pos; i < min_copy; i += sizeof(elf_greg_t),
1650 index++)
1651 if (access_elf_reg(dst->target, info, i,
1652 &tmp[index], 0) < 0) {
1653 dst->ret = -EIO;
1654 return;
1655 }
1656 dst->ret = user_regset_copyout(&dst->pos, &dst->count,
1657 &dst->u.get.kbuf, &dst->u.get.ubuf, tmp,
1658 ELF_CR_IIP_OFFSET, ELF_AR_END_OFFSET);
1659 }
1660}
1661
1662void do_gpregs_set(struct unw_frame_info *info, void *arg)
1663{
1664 struct pt_regs *pt;
1665 struct regset_getset *dst = arg;
1666 elf_greg_t tmp[16];
1667 unsigned int i, index;
1668
1669 if (unw_unwind_to_user(info) < 0)
1670 return;
1671
1672 /* Skip r0 */
1673 if (dst->count > 0 && dst->pos < ELF_GR_OFFSET(1)) {
1674 dst->ret = user_regset_copyin_ignore(&dst->pos, &dst->count,
1675 &dst->u.set.kbuf,
1676 &dst->u.set.ubuf,
1677 0, ELF_GR_OFFSET(1));
1678 if (dst->ret || dst->count == 0)
1679 return;
1680 }
1681
1682 /* gr1-gr15 */
1683 if (dst->count > 0 && dst->pos < ELF_GR_OFFSET(16)) {
1684 i = dst->pos;
1685 index = (dst->pos - ELF_GR_OFFSET(1)) / sizeof(elf_greg_t);
1686 dst->ret = user_regset_copyin(&dst->pos, &dst->count,
1687 &dst->u.set.kbuf, &dst->u.set.ubuf, tmp,
1688 ELF_GR_OFFSET(1), ELF_GR_OFFSET(16));
1689 if (dst->ret)
1690 return;
1691 for ( ; i < dst->pos; i += sizeof(elf_greg_t), index++)
1692 if (access_elf_reg(dst->target, info, i,
1693 &tmp[index], 1) < 0) {
1694 dst->ret = -EIO;
1695 return;
1696 }
1697 if (dst->count == 0)
1698 return;
1699 }
1700
1701 /* gr16-gr31 */
1702 if (dst->count > 0 && dst->pos < ELF_NAT_OFFSET) {
1703 pt = task_pt_regs(dst->target);
1704 dst->ret = user_regset_copyin(&dst->pos, &dst->count,
1705 &dst->u.set.kbuf, &dst->u.set.ubuf, &pt->r16,
1706 ELF_GR_OFFSET(16), ELF_NAT_OFFSET);
1707 if (dst->ret || dst->count == 0)
1708 return;
1709 }
1710
1711 /* nat, pr, b0 - b7 */
1712 if (dst->count > 0 && dst->pos < ELF_CR_IIP_OFFSET) {
1713 i = dst->pos;
1714 index = (dst->pos - ELF_NAT_OFFSET) / sizeof(elf_greg_t);
1715 dst->ret = user_regset_copyin(&dst->pos, &dst->count,
1716 &dst->u.set.kbuf, &dst->u.set.ubuf, tmp,
1717 ELF_NAT_OFFSET, ELF_CR_IIP_OFFSET);
1718 if (dst->ret)
1719 return;
1720 for (; i < dst->pos; i += sizeof(elf_greg_t), index++)
1721 if (access_elf_reg(dst->target, info, i,
1722 &tmp[index], 1) < 0) {
1723 dst->ret = -EIO;
1724 return;
1725 }
1726 if (dst->count == 0)
1727 return;
1728 }
1729
1730 /* ip cfm psr ar.rsc ar.bsp ar.bspstore ar.rnat
1731 * ar.ccv ar.unat ar.fpsr ar.pfs ar.lc ar.ec ar.csd ar.ssd
1732 */
1733 if (dst->count > 0 && dst->pos < (ELF_AR_END_OFFSET)) {
1734 i = dst->pos;
1735 index = (dst->pos - ELF_CR_IIP_OFFSET) / sizeof(elf_greg_t);
1736 dst->ret = user_regset_copyin(&dst->pos, &dst->count,
1737 &dst->u.set.kbuf, &dst->u.set.ubuf, tmp,
1738 ELF_CR_IIP_OFFSET, ELF_AR_END_OFFSET);
1739 if (dst->ret)
1740 return;
1741 for ( ; i < dst->pos; i += sizeof(elf_greg_t), index++)
1742 if (access_elf_reg(dst->target, info, i,
1743 &tmp[index], 1) < 0) {
1744 dst->ret = -EIO;
1745 return;
1746 }
1747 }
1748}
1749
1750#define ELF_FP_OFFSET(i) (i * sizeof(elf_fpreg_t))
1751
1752void do_fpregs_get(struct unw_frame_info *info, void *arg)
1753{
1754 struct regset_getset *dst = arg;
1755 struct task_struct *task = dst->target;
1756 elf_fpreg_t tmp[30];
1757 int index, min_copy, i;
1758
1759 if (unw_unwind_to_user(info) < 0)
1760 return;
1761
1762 /* Skip pos 0 and 1 */
1763 if (dst->count > 0 && dst->pos < ELF_FP_OFFSET(2)) {
1764 dst->ret = user_regset_copyout_zero(&dst->pos, &dst->count,
1765 &dst->u.get.kbuf,
1766 &dst->u.get.ubuf,
1767 0, ELF_FP_OFFSET(2));
1768 if (dst->count == 0 || dst->ret)
1769 return;
1770 }
1771
1772 /* fr2-fr31 */
1773 if (dst->count > 0 && dst->pos < ELF_FP_OFFSET(32)) {
1774 index = (dst->pos - ELF_FP_OFFSET(2)) / sizeof(elf_fpreg_t);
1775
1776 min_copy = min(((unsigned int)ELF_FP_OFFSET(32)),
1777 dst->pos + dst->count);
1778 for (i = dst->pos; i < min_copy; i += sizeof(elf_fpreg_t),
1779 index++)
1780 if (unw_get_fr(info, i / sizeof(elf_fpreg_t),
1781 &tmp[index])) {
1782 dst->ret = -EIO;
1783 return;
1784 }
1785 dst->ret = user_regset_copyout(&dst->pos, &dst->count,
1786 &dst->u.get.kbuf, &dst->u.get.ubuf, tmp,
1787 ELF_FP_OFFSET(2), ELF_FP_OFFSET(32));
1788 if (dst->count == 0 || dst->ret)
1789 return;
1790 }
1791
1792 /* fph */
1793 if (dst->count > 0) {
1794 ia64_flush_fph(dst->target);
1795 if (task->thread.flags & IA64_THREAD_FPH_VALID)
1796 dst->ret = user_regset_copyout(
1797 &dst->pos, &dst->count,
1798 &dst->u.get.kbuf, &dst->u.get.ubuf,
1799 &dst->target->thread.fph,
1800 ELF_FP_OFFSET(32), -1);
1801 else
1802 /* Zero fill instead. */
1803 dst->ret = user_regset_copyout_zero(
1804 &dst->pos, &dst->count,
1805 &dst->u.get.kbuf, &dst->u.get.ubuf,
1806 ELF_FP_OFFSET(32), -1);
1807 }
1808}
1809
1810void do_fpregs_set(struct unw_frame_info *info, void *arg)
1811{
1812 struct regset_getset *dst = arg;
1813 elf_fpreg_t fpreg, tmp[30];
1814 int index, start, end;
1815
1816 if (unw_unwind_to_user(info) < 0)
1817 return;
1818
1819 /* Skip pos 0 and 1 */
1820 if (dst->count > 0 && dst->pos < ELF_FP_OFFSET(2)) {
1821 dst->ret = user_regset_copyin_ignore(&dst->pos, &dst->count,
1822 &dst->u.set.kbuf,
1823 &dst->u.set.ubuf,
1824 0, ELF_FP_OFFSET(2));
1825 if (dst->count == 0 || dst->ret)
1826 return;
1827 }
1828
1829 /* fr2-fr31 */
1830 if (dst->count > 0 && dst->pos < ELF_FP_OFFSET(32)) {
1831 start = dst->pos;
1832 end = min(((unsigned int)ELF_FP_OFFSET(32)),
1833 dst->pos + dst->count);
1834 dst->ret = user_regset_copyin(&dst->pos, &dst->count,
1835 &dst->u.set.kbuf, &dst->u.set.ubuf, tmp,
1836 ELF_FP_OFFSET(2), ELF_FP_OFFSET(32));
1837 if (dst->ret)
1838 return;
1839
1840 if (start & 0xF) { /* only write high part */
1841 if (unw_get_fr(info, start / sizeof(elf_fpreg_t),
1842 &fpreg)) {
1843 dst->ret = -EIO;
1844 return;
1845 }
1846 tmp[start / sizeof(elf_fpreg_t) - 2].u.bits[0]
1847 = fpreg.u.bits[0];
1848 start &= ~0xFUL;
1849 }
1850 if (end & 0xF) { /* only write low part */
1851 if (unw_get_fr(info, end / sizeof(elf_fpreg_t),
1852 &fpreg)) {
1853 dst->ret = -EIO;
1854 return;
1855 }
1856 tmp[end / sizeof(elf_fpreg_t) - 2].u.bits[1]
1857 = fpreg.u.bits[1];
1858 end = (end + 0xF) & ~0xFUL;
1859 }
1860
1861 for ( ; start < end ; start += sizeof(elf_fpreg_t)) {
1862 index = start / sizeof(elf_fpreg_t);
1863 if (unw_set_fr(info, index, tmp[index - 2])) {
1864 dst->ret = -EIO;
1865 return;
1866 }
1867 }
1868 if (dst->ret || dst->count == 0)
1869 return;
1870 }
1871
1872 /* fph */
1873 if (dst->count > 0 && dst->pos < ELF_FP_OFFSET(128)) {
1874 ia64_sync_fph(dst->target);
1875 dst->ret = user_regset_copyin(&dst->pos, &dst->count,
1876 &dst->u.set.kbuf,
1877 &dst->u.set.ubuf,
1878 &dst->target->thread.fph,
1879 ELF_FP_OFFSET(32), -1);
1880 }
1881}
1882
1883static int
1884do_regset_call(void (*call)(struct unw_frame_info *, void *),
1885 struct task_struct *target,
1886 const struct user_regset *regset,
1887 unsigned int pos, unsigned int count,
1888 const void *kbuf, const void __user *ubuf)
1889{
1890 struct regset_getset info = { .target = target, .regset = regset,
1891 .pos = pos, .count = count,
1892 .u.set = { .kbuf = kbuf, .ubuf = ubuf },
1893 .ret = 0 };
1894
1895 if (target == current)
1896 unw_init_running(call, &info);
1897 else {
1898 struct unw_frame_info ufi;
1899 memset(&ufi, 0, sizeof(ufi));
1900 unw_init_from_blocked_task(&ufi, target);
1901 (*call)(&ufi, &info);
1902 }
1903
1904 return info.ret;
1905}
1906
1907static int
1908gpregs_get(struct task_struct *target,
1909 const struct user_regset *regset,
1910 unsigned int pos, unsigned int count,
1911 void *kbuf, void __user *ubuf)
1912{
1913 return do_regset_call(do_gpregs_get, target, regset, pos, count,
1914 kbuf, ubuf);
1915}
1916
1917static int gpregs_set(struct task_struct *target,
1918 const struct user_regset *regset,
1919 unsigned int pos, unsigned int count,
1920 const void *kbuf, const void __user *ubuf)
1921{
1922 return do_regset_call(do_gpregs_set, target, regset, pos, count,
1923 kbuf, ubuf);
1924}
1925
1926static void do_gpregs_writeback(struct unw_frame_info *info, void *arg)
1927{
1928 do_sync_rbs(info, ia64_sync_user_rbs);
1929}
1930
1931/*
1932 * This is called to write back the register backing store.
1933 * ptrace does this before it stops, so that a tracer reading the user
1934 * memory after the thread stops will get the current register data.
1935 */
1936static int
1937gpregs_writeback(struct task_struct *target,
1938 const struct user_regset *regset,
1939 int now)
1940{
1941 if (test_and_set_tsk_thread_flag(target, TIF_RESTORE_RSE))
1942 return 0;
1943 tsk_set_notify_resume(target);
1944 return do_regset_call(do_gpregs_writeback, target, regset, 0, 0,
1945 NULL, NULL);
1946}
1947
1948static int
1949fpregs_active(struct task_struct *target, const struct user_regset *regset)
1950{
1951 return (target->thread.flags & IA64_THREAD_FPH_VALID) ? 128 : 32;
1952}
1953
1954static int fpregs_get(struct task_struct *target,
1955 const struct user_regset *regset,
1956 unsigned int pos, unsigned int count,
1957 void *kbuf, void __user *ubuf)
1958{
1959 return do_regset_call(do_fpregs_get, target, regset, pos, count,
1960 kbuf, ubuf);
1961}
1962
1963static int fpregs_set(struct task_struct *target,
1964 const struct user_regset *regset,
1965 unsigned int pos, unsigned int count,
1966 const void *kbuf, const void __user *ubuf)
1967{
1968 return do_regset_call(do_fpregs_set, target, regset, pos, count,
1969 kbuf, ubuf);
1970}
1971
1972static int
1973access_uarea(struct task_struct *child, unsigned long addr,
1974 unsigned long *data, int write_access)
1975{
1976 unsigned int pos = -1; /* an invalid value */
1977 int ret;
1978 unsigned long *ptr, regnum;
1979
1980 if ((addr & 0x7) != 0) {
1981 dprintk("ptrace: unaligned register address 0x%lx\n", addr);
1982 return -1;
1983 }
1984 if ((addr >= PT_NAT_BITS + 8 && addr < PT_F2) ||
1985 (addr >= PT_R7 + 8 && addr < PT_B1) ||
1986 (addr >= PT_AR_LC + 8 && addr < PT_CR_IPSR) ||
1987 (addr >= PT_AR_SSD + 8 && addr < PT_DBR)) {
1988 dprintk("ptrace: rejecting access to register "
1989 "address 0x%lx\n", addr);
1990 return -1;
1991 }
1992
1993 switch (addr) {
1994 case PT_F32 ... (PT_F127 + 15):
1995 pos = addr - PT_F32 + ELF_FP_OFFSET(32);
1996 break;
1997 case PT_F2 ... (PT_F5 + 15):
1998 pos = addr - PT_F2 + ELF_FP_OFFSET(2);
1999 break;
2000 case PT_F10 ... (PT_F31 + 15):
2001 pos = addr - PT_F10 + ELF_FP_OFFSET(10);
2002 break;
2003 case PT_F6 ... (PT_F9 + 15):
2004 pos = addr - PT_F6 + ELF_FP_OFFSET(6);
2005 break;
2006 }
2007
2008 if (pos != -1) {
2009 if (write_access)
2010 ret = fpregs_set(child, NULL, pos,
2011 sizeof(unsigned long), data, NULL);
2012 else
2013 ret = fpregs_get(child, NULL, pos,
2014 sizeof(unsigned long), data, NULL);
2015 if (ret != 0)
2016 return -1;
2017 return 0;
2018 }
2019
2020 switch (addr) {
2021 case PT_NAT_BITS:
2022 pos = ELF_NAT_OFFSET;
2023 break;
2024 case PT_R4 ... PT_R7:
2025 pos = addr - PT_R4 + ELF_GR_OFFSET(4);
2026 break;
2027 case PT_B1 ... PT_B5:
2028 pos = addr - PT_B1 + ELF_BR_OFFSET(1);
2029 break;
2030 case PT_AR_EC:
2031 pos = ELF_AR_EC_OFFSET;
2032 break;
2033 case PT_AR_LC:
2034 pos = ELF_AR_LC_OFFSET;
2035 break;
2036 case PT_CR_IPSR:
2037 pos = ELF_CR_IPSR_OFFSET;
2038 break;
2039 case PT_CR_IIP:
2040 pos = ELF_CR_IIP_OFFSET;
2041 break;
2042 case PT_CFM:
2043 pos = ELF_CFM_OFFSET;
2044 break;
2045 case PT_AR_UNAT:
2046 pos = ELF_AR_UNAT_OFFSET;
2047 break;
2048 case PT_AR_PFS:
2049 pos = ELF_AR_PFS_OFFSET;
2050 break;
2051 case PT_AR_RSC:
2052 pos = ELF_AR_RSC_OFFSET;
2053 break;
2054 case PT_AR_RNAT:
2055 pos = ELF_AR_RNAT_OFFSET;
2056 break;
2057 case PT_AR_BSPSTORE:
2058 pos = ELF_AR_BSPSTORE_OFFSET;
2059 break;
2060 case PT_PR:
2061 pos = ELF_PR_OFFSET;
2062 break;
2063 case PT_B6:
2064 pos = ELF_BR_OFFSET(6);
2065 break;
2066 case PT_AR_BSP:
2067 pos = ELF_AR_BSP_OFFSET;
2068 break;
2069 case PT_R1 ... PT_R3:
2070 pos = addr - PT_R1 + ELF_GR_OFFSET(1);
2071 break;
2072 case PT_R12 ... PT_R15:
2073 pos = addr - PT_R12 + ELF_GR_OFFSET(12);
2074 break;
2075 case PT_R8 ... PT_R11:
2076 pos = addr - PT_R8 + ELF_GR_OFFSET(8);
2077 break;
2078 case PT_R16 ... PT_R31:
2079 pos = addr - PT_R16 + ELF_GR_OFFSET(16);
2080 break;
2081 case PT_AR_CCV:
2082 pos = ELF_AR_CCV_OFFSET;
2083 break;
2084 case PT_AR_FPSR:
2085 pos = ELF_AR_FPSR_OFFSET;
2086 break;
2087 case PT_B0:
2088 pos = ELF_BR_OFFSET(0);
2089 break;
2090 case PT_B7:
2091 pos = ELF_BR_OFFSET(7);
2092 break;
2093 case PT_AR_CSD:
2094 pos = ELF_AR_CSD_OFFSET;
2095 break;
2096 case PT_AR_SSD:
2097 pos = ELF_AR_SSD_OFFSET;
2098 break;
2099 }
2100
2101 if (pos != -1) {
2102 if (write_access)
2103 ret = gpregs_set(child, NULL, pos,
2104 sizeof(unsigned long), data, NULL);
2105 else
2106 ret = gpregs_get(child, NULL, pos,
2107 sizeof(unsigned long), data, NULL);
2108 if (ret != 0)
2109 return -1;
2110 return 0;
2111 }
2112
2113 /* access debug registers */
2114 if (addr >= PT_IBR) {
2115 regnum = (addr - PT_IBR) >> 3;
2116 ptr = &child->thread.ibr[0];
2117 } else {
2118 regnum = (addr - PT_DBR) >> 3;
2119 ptr = &child->thread.dbr[0];
2120 }
2121
2122 if (regnum >= 8) {
2123 dprintk("ptrace: rejecting access to register "
2124 "address 0x%lx\n", addr);
2125 return -1;
2126 }
2127#ifdef CONFIG_PERFMON
2128 /*
2129 * Check if debug registers are used by perfmon. This
2130 * test must be done once we know that we can do the
2131 * operation, i.e. the arguments are all valid, but
2132 * before we start modifying the state.
2133 *
2134 * Perfmon needs to keep a count of how many processes
2135 * are trying to modify the debug registers for system
2136 * wide monitoring sessions.
2137 *
2138 * We also include read access here, because they may
2139 * cause the PMU-installed debug register state
2140 * (dbr[], ibr[]) to be reset. The two arrays are also
2141 * used by perfmon, but we do not use
2142 * IA64_THREAD_DBG_VALID. The registers are restored
2143 * by the PMU context switch code.
2144 */
2145 if (pfm_use_debug_registers(child))
2146 return -1;
2147#endif
2148
2149 if (!(child->thread.flags & IA64_THREAD_DBG_VALID)) {
2150 child->thread.flags |= IA64_THREAD_DBG_VALID;
2151 memset(child->thread.dbr, 0,
2152 sizeof(child->thread.dbr));
2153 memset(child->thread.ibr, 0,
2154 sizeof(child->thread.ibr));
2155 }
2156
2157 ptr += regnum;
2158
2159 if ((regnum & 1) && write_access) {
2160 /* don't let the user set kernel-level breakpoints: */
2161 *ptr = *data & ~(7UL << 56);
2162 return 0;
2163 }
2164 if (write_access)
2165 *ptr = *data;
2166 else
2167 *data = *ptr;
2168 return 0;
2169}
2170
2171static const struct user_regset native_regsets[] = {
2172 {
2173 .core_note_type = NT_PRSTATUS,
2174 .n = ELF_NGREG,
2175 .size = sizeof(elf_greg_t), .align = sizeof(elf_greg_t),
2176 .get = gpregs_get, .set = gpregs_set,
2177 .writeback = gpregs_writeback
2178 },
2179 {
2180 .core_note_type = NT_PRFPREG,
2181 .n = ELF_NFPREG,
2182 .size = sizeof(elf_fpreg_t), .align = sizeof(elf_fpreg_t),
2183 .get = fpregs_get, .set = fpregs_set, .active = fpregs_active
2184 },
2185};
2186
2187static const struct user_regset_view user_ia64_view = {
2188 .name = "ia64",
2189 .e_machine = EM_IA_64,
2190 .regsets = native_regsets, .n = ARRAY_SIZE(native_regsets)
2191};
2192
2193const struct user_regset_view *task_user_regset_view(struct task_struct *tsk)
2194{
2195#ifdef CONFIG_IA32_SUPPORT
2196 extern const struct user_regset_view user_ia32_view;
2197 if (IS_IA32_PROCESS(task_pt_regs(tsk)))
2198 return &user_ia32_view;
2199#endif
2200 return &user_ia64_view;
2201}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-28 14:18:49 -0500