141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/*
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* Based on arch/arm/include/asm/ptrace.h
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*
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* Copyright (C) 1996-2003 Russell King
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* Copyright (C) 2012 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ASM_PTRACE_H
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#define __ASM_PTRACE_H
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#include <uapi/asm/ptrace.h>
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/* AArch32-specific ptrace requests */
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#define COMPAT_PTRACE_GETREGS 12
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#define COMPAT_PTRACE_SETREGS 13
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#define COMPAT_PTRACE_GET_THREAD_AREA 22
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#define COMPAT_PTRACE_SET_SYSCALL 23
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#define COMPAT_PTRACE_GETVFPREGS 27
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#define COMPAT_PTRACE_SETVFPREGS 28
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#define COMPAT_PTRACE_GETHBPREGS 29
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#define COMPAT_PTRACE_SETHBPREGS 30
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#define COMPAT_PSR_MODE_USR 0x00000010
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#define COMPAT_PSR_T_BIT 0x00000020
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#define COMPAT_PSR_IT_MASK 0x0600fc00 /* If-Then execution state mask */
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/*
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* These are 'magic' values for PTRACE_PEEKUSR that return info about where a
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* process is located in memory.
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*/
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#define COMPAT_PT_TEXT_ADDR 0x10000
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#define COMPAT_PT_DATA_ADDR 0x10004
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#define COMPAT_PT_TEXT_END_ADDR 0x10008
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#ifndef __ASSEMBLY__
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/* sizeof(struct user) for AArch32 */
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#define COMPAT_USER_SZ 296
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/* AArch32 uses x13 as the stack pointer... */
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#define compat_sp regs[13]
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/* ... and x14 as the link register. */
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#define compat_lr regs[14]
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/*
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* This struct defines the way the registers are stored on the stack during an
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* exception. Note that sizeof(struct pt_regs) has to be a multiple of 16 (for
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* stack alignment). struct user_pt_regs must form a prefix of struct pt_regs.
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*/
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struct pt_regs {
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union {
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struct user_pt_regs user_regs;
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struct {
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u64 regs[31];
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u64 sp;
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u64 pc;
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u64 pstate;
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};
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};
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u64 orig_x0;
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u64 syscallno;
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};
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#define arch_has_single_step() (1)
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#ifdef CONFIG_COMPAT
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#define compat_thumb_mode(regs) \
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(((regs)->pstate & COMPAT_PSR_T_BIT))
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#else
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#define compat_thumb_mode(regs) (0)
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#endif
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#define user_mode(regs) \
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(((regs)->pstate & PSR_MODE_MASK) == PSR_MODE_EL0t)
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#define compat_user_mode(regs) \
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(((regs)->pstate & (PSR_MODE32_BIT | PSR_MODE_MASK)) == \
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(PSR_MODE32_BIT | PSR_MODE_EL0t))
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#define processor_mode(regs) \
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((regs)->pstate & PSR_MODE_MASK)
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#define interrupts_enabled(regs) \
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(!((regs)->pstate & PSR_I_BIT))
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#define fast_interrupts_enabled(regs) \
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(!((regs)->pstate & PSR_F_BIT))
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#define user_stack_pointer(regs) \
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((regs)->sp)
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/*
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* Are the current registers suitable for user mode? (used to maintain
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* security in signal handlers)
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*/
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static inline int valid_user_regs(struct user_pt_regs *regs)
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{
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if (user_mode(regs) && (regs->pstate & PSR_I_BIT) == 0) {
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regs->pstate &= ~(PSR_F_BIT | PSR_A_BIT);
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/* The T bit is reserved for AArch64 */
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if (!(regs->pstate & PSR_MODE32_BIT))
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regs->pstate &= ~COMPAT_PSR_T_BIT;
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return 1;
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}
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/*
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* Force PSR to something logical...
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*/
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regs->pstate &= PSR_f | PSR_s | (PSR_x & ~PSR_A_BIT) | \
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COMPAT_PSR_T_BIT | PSR_MODE32_BIT;
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if (!(regs->pstate & PSR_MODE32_BIT)) {
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regs->pstate &= ~COMPAT_PSR_T_BIT;
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regs->pstate |= PSR_MODE_EL0t;
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}
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return 0;
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}
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#define instruction_pointer(regs) (regs)->pc
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#ifdef CONFIG_SMP
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extern unsigned long profile_pc(struct pt_regs *regs);
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#else
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#define profile_pc(regs) instruction_pointer(regs)
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#endif
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extern int aarch32_break_trap(struct pt_regs *regs);
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#endif /* __ASSEMBLY__ */
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#endif
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