| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ASM_PPC64_SIGCONTEXT_H |
| 2 | #define _ASM_PPC64_SIGCONTEXT_H |
| 3 | |
| 4 | /* |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License |
| 7 | * as published by the Free Software Foundation; either version |
| 8 | * 2 of the License, or (at your option) any later version. |
| 9 | */ |
| 10 | #include <linux/compiler.h> |
| 11 | #include <asm/ptrace.h> |
| 12 | #include <asm/elf.h> |
| 13 | |
| 14 | |
| 15 | struct sigcontext { |
| 16 | unsigned long _unused[4]; |
| 17 | int signal; |
| 18 | int _pad0; |
| 19 | unsigned long handler; |
| 20 | unsigned long oldmask; |
| 21 | struct pt_regs __user *regs; |
| 22 | elf_gregset_t gp_regs; |
| 23 | elf_fpregset_t fp_regs; |
| 24 | /* |
| 25 | * To maintain compatibility with current implementations the sigcontext is |
| 26 | * extended by appending a pointer (v_regs) to a quadword type (elf_vrreg_t) |
| 27 | * followed by an unstructured (vmx_reserve) field of 69 doublewords. This |
| 28 | * allows the array of vector registers to be quadword aligned independent of |
| 29 | * the alignment of the containing sigcontext or ucontext. It is the |
| 30 | * responsibility of the code setting the sigcontext to set this pointer to |
| 31 | * either NULL (if this processor does not support the VMX feature) or the |
| 32 | * address of the first quadword within the allocated (vmx_reserve) area. |
| 33 | * |
| 34 | * The pointer (v_regs) of vector type (elf_vrreg_t) is type compatible with |
| 35 | * an array of 34 quadword entries (elf_vrregset_t). The entries with |
| 36 | * indexes 0-31 contain the corresponding vector registers. The entry with |
| 37 | * index 32 contains the vscr as the last word (offset 12) within the |
| 38 | * quadword. This allows the vscr to be stored as either a quadword (since |
| 39 | * it must be copied via a vector register to/from storage) or as a word. |
| 40 | * The entry with index 33 contains the vrsave as the first word (offset 0) |
| 41 | * within the quadword. |
| 42 | */ |
| 43 | elf_vrreg_t __user *v_regs; |
| 44 | long vmx_reserve[ELF_NVRREG+ELF_NVRREG+1]; |
| 45 | }; |
| 46 | |
| 47 | #endif /* _ASM_PPC64_SIGCONTEXT_H */ |