diff options
Diffstat (limited to 'arch/powerpc/include/uapi/asm/sigcontext.h')
| -rw-r--r-- | arch/powerpc/include/uapi/asm/sigcontext.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/arch/powerpc/include/uapi/asm/sigcontext.h b/arch/powerpc/include/uapi/asm/sigcontext.h new file mode 100644 index 000000000000..9c1f24fd5d11 --- /dev/null +++ b/arch/powerpc/include/uapi/asm/sigcontext.h | |||
| @@ -0,0 +1,87 @@ | |||
| 1 | #ifndef _ASM_POWERPC_SIGCONTEXT_H | ||
| 2 | #define _ASM_POWERPC_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 | #ifdef __powerpc64__ | ||
| 13 | #include <asm/elf.h> | ||
| 14 | #endif | ||
| 15 | |||
| 16 | struct sigcontext { | ||
| 17 | unsigned long _unused[4]; | ||
| 18 | int signal; | ||
| 19 | #ifdef __powerpc64__ | ||
| 20 | int _pad0; | ||
| 21 | #endif | ||
| 22 | unsigned long handler; | ||
| 23 | unsigned long oldmask; | ||
| 24 | struct pt_regs __user *regs; | ||
| 25 | #ifdef __powerpc64__ | ||
| 26 | elf_gregset_t gp_regs; | ||
| 27 | elf_fpregset_t fp_regs; | ||
| 28 | /* | ||
| 29 | * To maintain compatibility with current implementations the sigcontext is | ||
| 30 | * extended by appending a pointer (v_regs) to a quadword type (elf_vrreg_t) | ||
| 31 | * followed by an unstructured (vmx_reserve) field of 69 doublewords. This | ||
| 32 | * allows the array of vector registers to be quadword aligned independent of | ||
| 33 | * the alignment of the containing sigcontext or ucontext. It is the | ||
| 34 | * responsibility of the code setting the sigcontext to set this pointer to | ||
| 35 | * either NULL (if this processor does not support the VMX feature) or the | ||
| 36 | * address of the first quadword within the allocated (vmx_reserve) area. | ||
| 37 | * | ||
| 38 | * The pointer (v_regs) of vector type (elf_vrreg_t) is type compatible with | ||
| 39 | * an array of 34 quadword entries (elf_vrregset_t). The entries with | ||
| 40 | * indexes 0-31 contain the corresponding vector registers. The entry with | ||
| 41 | * index 32 contains the vscr as the last word (offset 12) within the | ||
| 42 | * quadword. This allows the vscr to be stored as either a quadword (since | ||
| 43 | * it must be copied via a vector register to/from storage) or as a word. | ||
| 44 | * The entry with index 33 contains the vrsave as the first word (offset 0) | ||
| 45 | * within the quadword. | ||
| 46 | * | ||
| 47 | * Part of the VSX data is stored here also by extending vmx_restore | ||
| 48 | * by an additional 32 double words. Architecturally the layout of | ||
| 49 | * the VSR registers and how they overlap on top of the legacy FPR and | ||
| 50 | * VR registers is shown below: | ||
| 51 | * | ||
| 52 | * VSR doubleword 0 VSR doubleword 1 | ||
| 53 | * ---------------------------------------------------------------- | ||
| 54 | * VSR[0] | FPR[0] | | | ||
| 55 | * ---------------------------------------------------------------- | ||
| 56 | * VSR[1] | FPR[1] | | | ||
| 57 | * ---------------------------------------------------------------- | ||
| 58 | * | ... | | | ||
| 59 | * | ... | | | ||
| 60 | * ---------------------------------------------------------------- | ||
| 61 | * VSR[30] | FPR[30] | | | ||
| 62 | * ---------------------------------------------------------------- | ||
| 63 | * VSR[31] | FPR[31] | | | ||
| 64 | * ---------------------------------------------------------------- | ||
| 65 | * VSR[32] | VR[0] | | ||
| 66 | * ---------------------------------------------------------------- | ||
| 67 | * VSR[33] | VR[1] | | ||
| 68 | * ---------------------------------------------------------------- | ||
| 69 | * | ... | | ||
| 70 | * | ... | | ||
| 71 | * ---------------------------------------------------------------- | ||
| 72 | * VSR[62] | VR[30] | | ||
| 73 | * ---------------------------------------------------------------- | ||
| 74 | * VSR[63] | VR[31] | | ||
| 75 | * ---------------------------------------------------------------- | ||
| 76 | * | ||
| 77 | * FPR/VSR 0-31 doubleword 0 is stored in fp_regs, and VMX/VSR 32-63 | ||
| 78 | * is stored at the start of vmx_reserve. vmx_reserve is extended for | ||
| 79 | * backwards compatility to store VSR 0-31 doubleword 1 after the VMX | ||
| 80 | * registers and vscr/vrsave. | ||
| 81 | */ | ||
| 82 | elf_vrreg_t __user *v_regs; | ||
| 83 | long vmx_reserve[ELF_NVRREG+ELF_NVRREG+32+1]; | ||
| 84 | #endif | ||
| 85 | }; | ||
| 86 | |||
| 87 | #endif /* _ASM_POWERPC_SIGCONTEXT_H */ | ||