diff options
Diffstat (limited to 'arch/sparc/include/asm')
| -rw-r--r-- | arch/sparc/include/asm/kdebug_64.h | 2 | ||||
| -rw-r--r-- | arch/sparc/include/asm/ptrace.h | 35 | ||||
| -rw-r--r-- | arch/sparc/include/asm/thread_info_64.h | 6 | ||||
| -rw-r--r-- | arch/sparc/include/asm/ttable.h | 6 | ||||
| -rw-r--r-- | arch/sparc/include/asm/uprobes.h | 59 |
5 files changed, 105 insertions, 3 deletions
diff --git a/arch/sparc/include/asm/kdebug_64.h b/arch/sparc/include/asm/kdebug_64.h index 04465de8f3b5..867286bf7b1a 100644 --- a/arch/sparc/include/asm/kdebug_64.h +++ b/arch/sparc/include/asm/kdebug_64.h @@ -10,6 +10,8 @@ enum die_val { DIE_OOPS = 1, DIE_DEBUG, /* ta 0x70 */ DIE_DEBUG_2, /* ta 0x71 */ + DIE_BPT, /* ta 0x73 */ + DIE_SSTEP, /* ta 0x74 */ DIE_DIE, DIE_TRAP, DIE_TRAP_TL1, diff --git a/arch/sparc/include/asm/ptrace.h b/arch/sparc/include/asm/ptrace.h index bac6a946ee00..ca57f08bd3db 100644 --- a/arch/sparc/include/asm/ptrace.h +++ b/arch/sparc/include/asm/ptrace.h @@ -61,7 +61,10 @@ extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS]; #define force_successful_syscall_return() set_thread_noerror(1) #define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV)) #define instruction_pointer(regs) ((regs)->tpc) -#define instruction_pointer_set(regs, val) ((regs)->tpc = (val)) +#define instruction_pointer_set(regs, val) do { \ + (regs)->tpc = (val); \ + (regs)->tnpc = (val)+4; \ + } while (0) #define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP]) static inline int is_syscall_success(struct pt_regs *regs) { @@ -77,6 +80,36 @@ unsigned long profile_pc(struct pt_regs *); #else #define profile_pc(regs) instruction_pointer(regs) #endif + +#define MAX_REG_OFFSET (offsetof(struct pt_regs, magic)) + +extern int regs_query_register_offset(const char *name); + +/** + * regs_get_register() - get register value from its offset + * @regs: pt_regs from which register value is gotten + * @offset: offset number of the register. + * + * regs_get_register returns the value of a register whose + * offset from @regs. The @offset is the offset of the register + * in struct pt_regs. If @offset is bigger than MAX_REG_OFFSET, + * this returns 0. + */ +static inline unsigned long regs_get_register(struct pt_regs *regs, + unsigned long offset) +{ + if (unlikely(offset >= MAX_REG_OFFSET)) + return 0; + if (offset == PT_V9_Y) + return *(unsigned int *)((unsigned long)regs + offset); + return *(unsigned long *)((unsigned long)regs + offset); +} + +/* Valid only for Kernel mode traps. */ +static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) +{ + return regs->u_regs[UREG_I6]; +} #else /* __ASSEMBLY__ */ #endif /* __ASSEMBLY__ */ #else /* (defined(__sparc__) && defined(__arch64__)) */ diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h index 3d7b925f6516..38a24f257b85 100644 --- a/arch/sparc/include/asm/thread_info_64.h +++ b/arch/sparc/include/asm/thread_info_64.h @@ -180,7 +180,7 @@ register struct thread_info *current_thread_info_reg asm("g6"); #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ /* flag bit 4 is available */ #define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */ -/* flag bit 6 is available */ +#define TIF_UPROBE 6 /* breakpointed or singlestepped */ #define TIF_32BIT 7 /* 32-bit binary */ #define TIF_NOHZ 8 /* in adaptive nohz mode */ #define TIF_SECCOMP 9 /* secure computing */ @@ -199,6 +199,7 @@ register struct thread_info *current_thread_info_reg asm("g6"); #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) #define _TIF_UNALIGNED (1<<TIF_UNALIGNED) +#define _TIF_UPROBE (1<<TIF_UPROBE) #define _TIF_32BIT (1<<TIF_32BIT) #define _TIF_NOHZ (1<<TIF_NOHZ) #define _TIF_SECCOMP (1<<TIF_SECCOMP) @@ -209,7 +210,8 @@ register struct thread_info *current_thread_info_reg asm("g6"); #define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \ _TIF_DO_NOTIFY_RESUME_MASK | \ _TIF_NEED_RESCHED) -#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING) +#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \ + _TIF_SIGPENDING | _TIF_UPROBE) #define is_32bit_task() (test_thread_flag(TIF_32BIT)) diff --git a/arch/sparc/include/asm/ttable.h b/arch/sparc/include/asm/ttable.h index 781b9f1dbdc2..82e7df296abc 100644 --- a/arch/sparc/include/asm/ttable.h +++ b/arch/sparc/include/asm/ttable.h @@ -186,6 +186,12 @@ #define KPROBES_TRAP(lvl) TRAP_ARG(bad_trap, lvl) #endif +#ifdef CONFIG_UPROBES +#define UPROBES_TRAP(lvl) TRAP_ARG(uprobe_trap, lvl) +#else +#define UPROBES_TRAP(lvl) TRAP_ARG(bad_trap, lvl) +#endif + #ifdef CONFIG_KGDB #define KGDB_TRAP(lvl) TRAP_IRQ(kgdb_trap, lvl) #else diff --git a/arch/sparc/include/asm/uprobes.h b/arch/sparc/include/asm/uprobes.h new file mode 100644 index 000000000000..f87aae5a908e --- /dev/null +++ b/arch/sparc/include/asm/uprobes.h @@ -0,0 +1,59 @@ +#ifndef _ASM_UPROBES_H +#define _ASM_UPROBES_H +/* + * User-space Probes (UProbes) for sparc + * + * Copyright (C) 2013 Oracle, Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * Authors: + * Jose E. Marchesi <jose.marchesi@oracle.com> + * Eric Saint Etienne <eric.saint.etienne@oracle.com> + */ + +typedef u32 uprobe_opcode_t; + +#define MAX_UINSN_BYTES 4 +#define UPROBE_XOL_SLOT_BYTES (MAX_UINSN_BYTES * 2) + +#define UPROBE_SWBP_INSN_SIZE 4 +#define UPROBE_SWBP_INSN 0x91d02073 /* ta 0x73 */ +#define UPROBE_STP_INSN 0x91d02074 /* ta 0x74 */ + +#define ANNUL_BIT (1 << 29) + +struct arch_uprobe { + union { + u8 insn[MAX_UINSN_BYTES]; + u32 ixol; + }; +}; + +struct arch_uprobe_task { + u32 saved_tpc; + u32 saved_tnpc; +}; + +struct task_struct; +struct notifier_block; + +extern int arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr); +extern int arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs); +extern int arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs); +extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk); +extern int arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data); +extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs); + +#endif /* _ASM_UPROBES_H */ |