projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 04277e02 | 1 | /* Copyright (C) 2001-2019 Free Software Foundation, Inc. |
| d5efd131 MF |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by David Mosberger-Tang <davidm@hpl.hp.com>. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 75efb018 MF |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| d5efd131 MF |
18 | |
| 19 | #ifndef _ia64_rse_h | |
| 20 | #define _ia64_rse_h | |
| 21 | ||
| 22 | #include <features.h> | |
| 23 | ||
| 24 | /* Register stack engine related helper functions. This file may be | |
| 25 | used in applications, so be careful about the name-space and give | |
| 26 | some consideration to non-GNU C compilers (though __inline is | |
| 27 | fine). */ | |
| 28 | ||
| 29 | static __inline unsigned long | |
| 30 | ia64_rse_slot_num (unsigned long *addr) | |
| 31 | { | |
| 32 | return (((unsigned long) addr) >> 3) & 0x3f; | |
| 33 | } | |
| 34 | ||
| 35 | /* Return TRUE if ADDR is the address of an RNAT slot. */ | |
| 36 | ||
| 37 | static __inline unsigned long | |
| 38 | ia64_rse_is_rnat_slot (unsigned long *addr) | |
| 39 | { | |
| 40 | return ia64_rse_slot_num (addr) == 0x3f; | |
| 41 | } | |
| 42 | ||
| 43 | /* Returns the address of the RNAT slot that covers the slot at | |
| 44 | address SLOT_ADDR. */ | |
| 45 | ||
| 46 | static __inline unsigned long * | |
| 47 | ia64_rse_rnat_addr (unsigned long *slot_addr) | |
| 48 | { | |
| 49 | return (unsigned long *) ((unsigned long) slot_addr | (0x3f << 3)); | |
| 50 | } | |
| 51 | ||
| 52 | /* Calcuate the number of registers in the dirty partition starting at | |
| 53 | BSPSTORE with a size of DIRTY bytes. This isn't simply DIRTY | |
| 54 | divided by eight because the 64th slot is used to store ar.rnat. */ | |
| 55 | ||
| 56 | static __inline unsigned long | |
| 57 | ia64_rse_num_regs (unsigned long *bspstore, unsigned long *bsp) | |
| 58 | { | |
| 59 | unsigned long slots = (bsp - bspstore); | |
| 60 | ||
| 61 | return slots - (ia64_rse_slot_num(bspstore) + slots)/0x40; | |
| 62 | } | |
| 63 | ||
| 64 | /* The inverse of the above: given bspstore and the number of | |
| 65 | registers, calculate ar.bsp. */ | |
| 66 | ||
| 67 | static __inline unsigned long * | |
| 68 | ia64_rse_skip_regs (unsigned long *addr, long num_regs) | |
| 69 | { | |
| 70 | long delta = ia64_rse_slot_num(addr) + num_regs; | |
| 71 | ||
| 72 | if (num_regs < 0) | |
| 73 | delta -= 0x3e; | |
| 74 | return addr + num_regs + delta/0x3f; | |
| 75 | } | |
| 76 | ||
| 77 | #endif /* _ia64_rse_h */ |