Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _PPC_PTRACE_H |
| 2 | #define _PPC_PTRACE_H |
| 3 | |
| 4 | /* |
| 5 | * This struct defines the way the registers are stored on the |
| 6 | * kernel stack during a system call or other kernel entry. |
| 7 | * |
| 8 | * this should only contain volatile regs |
| 9 | * since we can keep non-volatile in the thread_struct |
| 10 | * should set this up when only volatiles are saved |
| 11 | * by intr code. |
| 12 | * |
| 13 | * Since this is going on the stack, *CARE MUST BE TAKEN* to insure |
| 14 | * that the overall structure is a multiple of 16 bytes in length. |
| 15 | * |
| 16 | * Note that the offsets of the fields in this struct correspond with |
| 17 | * the PT_* values below. This simplifies arch/ppc/kernel/ptrace.c. |
| 18 | */ |
| 19 | |
| 20 | #ifndef __ASSEMBLY__ |
| 21 | struct pt_regs { |
| 22 | unsigned long gpr[32]; |
| 23 | unsigned long nip; |
| 24 | unsigned long msr; |
| 25 | unsigned long orig_gpr3; /* Used for restarting system calls */ |
| 26 | unsigned long ctr; |
| 27 | unsigned long link; |
| 28 | unsigned long xer; |
| 29 | unsigned long ccr; |
| 30 | unsigned long mq; /* 601 only (not used at present) */ |
| 31 | /* Used on APUS to hold IPL value. */ |
| 32 | unsigned long trap; /* Reason for being here */ |
| 33 | /* N.B. for critical exceptions on 4xx, the dar and dsisr |
| 34 | fields are overloaded to hold srr0 and srr1. */ |
| 35 | unsigned long dar; /* Fault registers */ |
| 36 | unsigned long dsisr; /* on 4xx/Book-E used for ESR */ |
| 37 | unsigned long result; /* Result of a system call */ |
| 38 | }; |
| 39 | |
| 40 | #endif /* __ASSEMBLY__ */ |
| 41 | |
| 42 | #ifdef __KERNEL__ |
| 43 | #define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */ |
| 44 | |
| 45 | /* Size of stack frame allocated when calling signal handler. */ |
| 46 | #define __SIGNAL_FRAMESIZE 64 |
| 47 | |
| 48 | #ifndef __ASSEMBLY__ |
| 49 | #define instruction_pointer(regs) ((regs)->nip) |
| 50 | #ifdef CONFIG_SMP |
| 51 | extern unsigned long profile_pc(struct pt_regs *regs); |
| 52 | #else |
| 53 | #define profile_pc(regs) instruction_pointer(regs) |
| 54 | #endif |
| 55 | |
| 56 | #define user_mode(regs) (((regs)->msr & MSR_PR) != 0) |
| 57 | |
| 58 | #define force_successful_syscall_return() \ |
| 59 | do { \ |
| 60 | current_thread_info()->local_flags |= _TIFL_FORCE_NOERROR; \ |
| 61 | } while(0) |
| 62 | |
| 63 | /* |
| 64 | * We use the least-significant bit of the trap field to indicate |
| 65 | * whether we have saved the full set of registers, or only a |
| 66 | * partial set. A 1 there means the partial set. |
| 67 | * On 4xx we use the next bit to indicate whether the exception |
| 68 | * is a critical exception (1 means it is). |
| 69 | */ |
| 70 | #define FULL_REGS(regs) (((regs)->trap & 1) == 0) |
| 71 | #define IS_CRITICAL_EXC(regs) (((regs)->trap & 2) == 0) |
| 72 | #define TRAP(regs) ((regs)->trap & ~0xF) |
| 73 | |
| 74 | #define CHECK_FULL_REGS(regs) \ |
| 75 | do { \ |
| 76 | if ((regs)->trap & 1) \ |
| 77 | printk(KERN_CRIT "%s: partial register set\n", __FUNCTION__); \ |
| 78 | } while (0) |
| 79 | #endif /* __ASSEMBLY__ */ |
| 80 | |
| 81 | #endif /* __KERNEL__ */ |
| 82 | |
| 83 | /* |
| 84 | * Offsets used by 'ptrace' system call interface. |
| 85 | * These can't be changed without breaking binary compatibility |
| 86 | * with MkLinux, etc. |
| 87 | */ |
| 88 | #define PT_R0 0 |
| 89 | #define PT_R1 1 |
| 90 | #define PT_R2 2 |
| 91 | #define PT_R3 3 |
| 92 | #define PT_R4 4 |
| 93 | #define PT_R5 5 |
| 94 | #define PT_R6 6 |
| 95 | #define PT_R7 7 |
| 96 | #define PT_R8 8 |
| 97 | #define PT_R9 9 |
| 98 | #define PT_R10 10 |
| 99 | #define PT_R11 11 |
| 100 | #define PT_R12 12 |
| 101 | #define PT_R13 13 |
| 102 | #define PT_R14 14 |
| 103 | #define PT_R15 15 |
| 104 | #define PT_R16 16 |
| 105 | #define PT_R17 17 |
| 106 | #define PT_R18 18 |
| 107 | #define PT_R19 19 |
| 108 | #define PT_R20 20 |
| 109 | #define PT_R21 21 |
| 110 | #define PT_R22 22 |
| 111 | #define PT_R23 23 |
| 112 | #define PT_R24 24 |
| 113 | #define PT_R25 25 |
| 114 | #define PT_R26 26 |
| 115 | #define PT_R27 27 |
| 116 | #define PT_R28 28 |
| 117 | #define PT_R29 29 |
| 118 | #define PT_R30 30 |
| 119 | #define PT_R31 31 |
| 120 | |
| 121 | #define PT_NIP 32 |
| 122 | #define PT_MSR 33 |
| 123 | #ifdef __KERNEL__ |
| 124 | #define PT_ORIG_R3 34 |
| 125 | #endif |
| 126 | #define PT_CTR 35 |
| 127 | #define PT_LNK 36 |
| 128 | #define PT_XER 37 |
| 129 | #define PT_CCR 38 |
| 130 | #define PT_MQ 39 |
| 131 | |
| 132 | #define PT_FPR0 48 /* each FP reg occupies 2 slots in this space */ |
| 133 | #define PT_FPR31 (PT_FPR0 + 2*31) |
| 134 | #define PT_FPSCR (PT_FPR0 + 2*32 + 1) |
| 135 | |
| 136 | /* Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go */ |
| 137 | #define PTRACE_GETVRREGS 18 |
| 138 | #define PTRACE_SETVRREGS 19 |
| 139 | |
| 140 | /* Get/set all the upper 32-bits of the SPE registers, accumulator, and |
| 141 | * spefscr, in one go */ |
| 142 | #define PTRACE_GETEVRREGS 20 |
| 143 | #define PTRACE_SETEVRREGS 21 |
| 144 | |
Anton Blanchard | a94d308 | 2005-09-10 16:01:10 +1000 | [diff] [blame] | 145 | /* |
| 146 | * Get or set a debug register. The first 16 are DABR registers and the |
| 147 | * second 16 are IABR registers. |
| 148 | */ |
| 149 | #define PTRACE_GET_DEBUGREG 25 |
| 150 | #define PTRACE_SET_DEBUGREG 26 |
| 151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | #endif |