diff options
Diffstat (limited to 'arch/powerpc/include/asm/ptrace.h')
| -rw-r--r-- | arch/powerpc/include/asm/ptrace.h | 296 |
1 files changed, 44 insertions, 252 deletions
diff --git a/arch/powerpc/include/asm/ptrace.h b/arch/powerpc/include/asm/ptrace.h index 0175a676b34..279b80f3bb2 100644 --- a/arch/powerpc/include/asm/ptrace.h +++ b/arch/powerpc/include/asm/ptrace.h @@ -1,6 +1,3 @@ -#ifndef _ASM_POWERPC_PTRACE_H -#define _ASM_POWERPC_PTRACE_H - /* * Copyright (C) 2001 PPC64 Team, IBM Corp * @@ -23,45 +20,31 @@ * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ +#ifndef _ASM_POWERPC_PTRACE_H +#define _ASM_POWERPC_PTRACE_H -#include <linux/types.h> +#include <uapi/asm/ptrace.h> -#ifndef __ASSEMBLY__ -struct pt_regs { - unsigned long gpr[32]; - unsigned long nip; - unsigned long msr; - unsigned long orig_gpr3; /* Used for restarting system calls */ - unsigned long ctr; - unsigned long link; - unsigned long xer; - unsigned long ccr; #ifdef __powerpc64__ - unsigned long softe; /* Soft enabled/disabled */ -#else - unsigned long mq; /* 601 only (not used at present) */ - /* Used on APUS to hold IPL value. */ -#endif - unsigned long trap; /* Reason for being here */ - /* N.B. for critical exceptions on 4xx, the dar and dsisr - fields are overloaded to hold srr0 and srr1. */ - unsigned long dar; /* Fault registers */ - unsigned long dsisr; /* on 4xx/Book-E used for ESR */ - unsigned long result; /* Result of a system call */ -}; - -#endif /* __ASSEMBLY__ */ - -#ifdef __KERNEL__ -#ifdef __powerpc64__ +/* + * Size of redzone that userspace is allowed to use below the stack + * pointer. This is 288 in the 64-bit big-endian ELF ABI, and 512 in + * the new ELFv2 little-endian ABI, so we allow the larger amount. + * + * For kernel code we allow a 288-byte redzone, in order to conserve + * kernel stack space; gcc currently only uses 288 bytes, and will + * hopefully allow explicit control of the redzone size in future. + */ +#define USER_REDZONE_SIZE 512 +#define KERNEL_REDZONE_SIZE 288 #define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */ #define STACK_FRAME_LR_SAVE 2 /* Location of LR in stack frame */ #define STACK_FRAME_REGS_MARKER ASM_CONST(0x7265677368657265) #define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + \ - STACK_FRAME_OVERHEAD + 288) + STACK_FRAME_OVERHEAD + KERNEL_REDZONE_SIZE) #define STACK_FRAME_MARKER 12 /* Size of dummy stack frame allocated when calling signal handler. */ @@ -70,6 +53,8 @@ struct pt_regs { #else /* __powerpc64__ */ +#define USER_REDZONE_SIZE 0 +#define KERNEL_REDZONE_SIZE 0 #define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */ #define STACK_FRAME_LR_SAVE 1 /* Location of LR in stack frame */ #define STACK_FRAME_REGS_MARKER ASM_CONST(0x72656773) @@ -83,17 +68,32 @@ struct pt_regs { #ifndef __ASSEMBLY__ -#define instruction_pointer(regs) ((regs)->nip) -#define user_stack_pointer(regs) ((regs)->gpr[1]) -#define kernel_stack_pointer(regs) ((regs)->gpr[1]) -#define regs_return_value(regs) ((regs)->gpr[3]) +#define GET_IP(regs) ((regs)->nip) +#define GET_USP(regs) ((regs)->gpr[1]) +#define GET_FP(regs) (0) +#define SET_FP(regs, val) #ifdef CONFIG_SMP extern unsigned long profile_pc(struct pt_regs *regs); -#else -#define profile_pc(regs) instruction_pointer(regs) +#define profile_pc profile_pc #endif +#include <asm-generic/ptrace.h> + +#define kernel_stack_pointer(regs) ((regs)->gpr[1]) +static inline int is_syscall_success(struct pt_regs *regs) +{ + return !(regs->ccr & 0x10000000); +} + +static inline long regs_return_value(struct pt_regs *regs) +{ + if (is_syscall_success(regs)) + return regs->gpr[3]; + else + return -regs->gpr[3]; +} + #ifdef __powerpc64__ #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1) #else @@ -106,10 +106,13 @@ extern unsigned long profile_pc(struct pt_regs *regs); } while(0) struct task_struct; -extern unsigned long ptrace_get_reg(struct task_struct *task, int regno); +extern int ptrace_get_reg(struct task_struct *task, int regno, + unsigned long *data); extern int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data); +#define current_pt_regs() \ + ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1) /* * We use the least-significant bit of the trap field to indicate * whether we have saved the full set of registers, or only a @@ -125,8 +128,10 @@ extern int ptrace_put_reg(struct task_struct *task, int regno, #endif /* ! __powerpc64__ */ #define TRAP(regs) ((regs)->trap & ~0xF) #ifdef __powerpc64__ +#define NV_REG_POISON 0xdeadbeefdeadbeefUL #define CHECK_FULL_REGS(regs) BUG_ON(regs->trap & 1) #else +#define NV_REG_POISON 0xdeadbeef #define CHECK_FULL_REGS(regs) \ do { \ if ((regs)->trap & 1) \ @@ -203,225 +208,12 @@ static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, #endif /* __ASSEMBLY__ */ -#endif /* __KERNEL__ */ - -/* - * Offsets used by 'ptrace' system call interface. - * These can't be changed without breaking binary compatibility - * with MkLinux, etc. - */ -#define PT_R0 0 -#define PT_R1 1 -#define PT_R2 2 -#define PT_R3 3 -#define PT_R4 4 -#define PT_R5 5 -#define PT_R6 6 -#define PT_R7 7 -#define PT_R8 8 -#define PT_R9 9 -#define PT_R10 10 -#define PT_R11 11 -#define PT_R12 12 -#define PT_R13 13 -#define PT_R14 14 -#define PT_R15 15 -#define PT_R16 16 -#define PT_R17 17 -#define PT_R18 18 -#define PT_R19 19 -#define PT_R20 20 -#define PT_R21 21 -#define PT_R22 22 -#define PT_R23 23 -#define PT_R24 24 -#define PT_R25 25 -#define PT_R26 26 -#define PT_R27 27 -#define PT_R28 28 -#define PT_R29 29 -#define PT_R30 30 -#define PT_R31 31 - -#define PT_NIP 32 -#define PT_MSR 33 -#define PT_ORIG_R3 34 -#define PT_CTR 35 -#define PT_LNK 36 -#define PT_XER 37 -#define PT_CCR 38 #ifndef __powerpc64__ -#define PT_MQ 39 -#else -#define PT_SOFTE 39 -#endif -#define PT_TRAP 40 -#define PT_DAR 41 -#define PT_DSISR 42 -#define PT_RESULT 43 -#define PT_REGS_COUNT 44 - -#define PT_FPR0 48 /* each FP reg occupies 2 slots in this space */ - -#ifndef __powerpc64__ - -#define PT_FPR31 (PT_FPR0 + 2*31) -#define PT_FPSCR (PT_FPR0 + 2*32 + 1) - #else /* __powerpc64__ */ - -#define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */ - -#ifdef __KERNEL__ #define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */ -#endif - -#define PT_VR0 82 /* each Vector reg occupies 2 slots in 64-bit */ -#define PT_VSCR (PT_VR0 + 32*2 + 1) -#define PT_VRSAVE (PT_VR0 + 33*2) - -#ifdef __KERNEL__ #define PT_VR0_32 164 /* each Vector reg occupies 4 slots in 32-bit */ #define PT_VSCR_32 (PT_VR0 + 32*4 + 3) #define PT_VRSAVE_32 (PT_VR0 + 33*4) -#endif - -/* - * Only store first 32 VSRs here. The second 32 VSRs in VR0-31 - */ -#define PT_VSR0 150 /* each VSR reg occupies 2 slots in 64-bit */ -#define PT_VSR31 (PT_VSR0 + 2*31) -#ifdef __KERNEL__ #define PT_VSR0_32 300 /* each VSR reg occupies 4 slots in 32-bit */ -#endif #endif /* __powerpc64__ */ - -/* - * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go. - * The transfer totals 34 quadword. Quadwords 0-31 contain the - * corresponding vector registers. Quadword 32 contains the vscr as the - * last word (offset 12) within that quadword. Quadword 33 contains the - * vrsave as the first word (offset 0) within the quadword. - * - * This definition of the VMX state is compatible with the current PPC32 - * ptrace interface. This allows signal handling and ptrace to use the same - * structures. This also simplifies the implementation of a bi-arch - * (combined (32- and 64-bit) gdb. - */ -#define PTRACE_GETVRREGS 18 -#define PTRACE_SETVRREGS 19 - -/* Get/set all the upper 32-bits of the SPE registers, accumulator, and - * spefscr, in one go */ -#define PTRACE_GETEVRREGS 20 -#define PTRACE_SETEVRREGS 21 - -/* Get the first 32 128bit VSX registers */ -#define PTRACE_GETVSRREGS 27 -#define PTRACE_SETVSRREGS 28 - -/* - * Get or set a debug register. The first 16 are DABR registers and the - * second 16 are IABR registers. - */ -#define PTRACE_GET_DEBUGREG 25 -#define PTRACE_SET_DEBUGREG 26 - -/* (new) PTRACE requests using the same numbers as x86 and the same - * argument ordering. Additionally, they support more registers too - */ -#define PTRACE_GETREGS 12 -#define PTRACE_SETREGS 13 -#define PTRACE_GETFPREGS 14 -#define PTRACE_SETFPREGS 15 -#define PTRACE_GETREGS64 22 -#define PTRACE_SETREGS64 23 - -/* (old) PTRACE requests with inverted arguments */ -#define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */ -#define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */ -#define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */ -#define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */ - -/* Calls to trace a 64bit program from a 32bit program */ -#define PPC_PTRACE_PEEKTEXT_3264 0x95 -#define PPC_PTRACE_PEEKDATA_3264 0x94 -#define PPC_PTRACE_POKETEXT_3264 0x93 -#define PPC_PTRACE_POKEDATA_3264 0x92 -#define PPC_PTRACE_PEEKUSR_3264 0x91 -#define PPC_PTRACE_POKEUSR_3264 0x90 - -#define PTRACE_SINGLEBLOCK 0x100 /* resume execution until next branch */ - -#define PPC_PTRACE_GETHWDBGINFO 0x89 -#define PPC_PTRACE_SETHWDEBUG 0x88 -#define PPC_PTRACE_DELHWDEBUG 0x87 - -#ifndef __ASSEMBLY__ - -struct ppc_debug_info { - __u32 version; /* Only version 1 exists to date */ - __u32 num_instruction_bps; - __u32 num_data_bps; - __u32 num_condition_regs; - __u32 data_bp_alignment; - __u32 sizeof_condition; /* size of the DVC register */ - __u64 features; -}; - -#endif /* __ASSEMBLY__ */ - -/* - * features will have bits indication whether there is support for: - */ -#define PPC_DEBUG_FEATURE_INSN_BP_RANGE 0x0000000000000001 -#define PPC_DEBUG_FEATURE_INSN_BP_MASK 0x0000000000000002 -#define PPC_DEBUG_FEATURE_DATA_BP_RANGE 0x0000000000000004 -#define PPC_DEBUG_FEATURE_DATA_BP_MASK 0x0000000000000008 - -#ifndef __ASSEMBLY__ - -struct ppc_hw_breakpoint { - __u32 version; /* currently, version must be 1 */ - __u32 trigger_type; /* only some combinations allowed */ - __u32 addr_mode; /* address match mode */ - __u32 condition_mode; /* break/watchpoint condition flags */ - __u64 addr; /* break/watchpoint address */ - __u64 addr2; /* range end or mask */ - __u64 condition_value; /* contents of the DVC register */ -}; - -#endif /* __ASSEMBLY__ */ - -/* - * Trigger Type - */ -#define PPC_BREAKPOINT_TRIGGER_EXECUTE 0x00000001 -#define PPC_BREAKPOINT_TRIGGER_READ 0x00000002 -#define PPC_BREAKPOINT_TRIGGER_WRITE 0x00000004 -#define PPC_BREAKPOINT_TRIGGER_RW \ - (PPC_BREAKPOINT_TRIGGER_READ | PPC_BREAKPOINT_TRIGGER_WRITE) - -/* - * Address Mode - */ -#define PPC_BREAKPOINT_MODE_EXACT 0x00000000 -#define PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE 0x00000001 -#define PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE 0x00000002 -#define PPC_BREAKPOINT_MODE_MASK 0x00000003 - -/* - * Condition Mode - */ -#define PPC_BREAKPOINT_CONDITION_MODE 0x00000003 -#define PPC_BREAKPOINT_CONDITION_NONE 0x00000000 -#define PPC_BREAKPOINT_CONDITION_AND 0x00000001 -#define PPC_BREAKPOINT_CONDITION_EXACT PPC_BREAKPOINT_CONDITION_AND -#define PPC_BREAKPOINT_CONDITION_OR 0x00000002 -#define PPC_BREAKPOINT_CONDITION_AND_OR 0x00000003 -#define PPC_BREAKPOINT_CONDITION_BE_ALL 0x00ff0000 -#define PPC_BREAKPOINT_CONDITION_BE_SHIFT 16 -#define PPC_BREAKPOINT_CONDITION_BE(n) \ - (1<<((n)+PPC_BREAKPOINT_CONDITION_BE_SHIFT)) - #endif /* _ASM_POWERPC_PTRACE_H */ |