mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
ab074ade9c
Pull audit updates from Eric Paris: "So this change across a whole bunch of arches really solves one basic problem. We want to audit when seccomp is killing a process. seccomp hooks in before the audit syscall entry code. audit_syscall_entry took as an argument the arch of the given syscall. Since the arch is part of what makes a syscall number meaningful it's an important part of the record, but it isn't available when seccomp shoots the syscall... For most arch's we have a better way to get the arch (syscall_get_arch) So the solution was two fold: Implement syscall_get_arch() everywhere there is audit which didn't have it. Use syscall_get_arch() in the seccomp audit code. Having syscall_get_arch() everywhere meant it was a useless flag on the stack and we could get rid of it for the typical syscall entry. The other changes inside the audit system aren't grand, fixed some records that had invalid spaces. Better locking around the task comm field. Removing some dead functions and structs. Make some things static. Really minor stuff" * git://git.infradead.org/users/eparis/audit: (31 commits) audit: rename audit_log_remove_rule to disambiguate for trees audit: cull redundancy in audit_rule_change audit: WARN if audit_rule_change called illegally audit: put rule existence check in canonical order next: openrisc: Fix build audit: get comm using lock to avoid race in string printing audit: remove open_arg() function that is never used audit: correct AUDIT_GET_FEATURE return message type audit: set nlmsg_len for multicast messages. audit: use union for audit_field values since they are mutually exclusive audit: invalid op= values for rules audit: use atomic_t to simplify audit_serial() kernel/audit.c: use ARRAY_SIZE instead of sizeof/sizeof[0] audit: reduce scope of audit_log_fcaps audit: reduce scope of audit_net_id audit: arm64: Remove the audit arch argument to audit_syscall_entry arm64: audit: Add audit hook in syscall_trace_enter/exit() audit: x86: drop arch from __audit_syscall_entry() interface sparc: implement is_32bit_task sparc: properly conditionalize use of TIF_32BIT ...
272 lines
8.7 KiB
C
272 lines
8.7 KiB
C
/* thread_info.h: sparc64 low-level thread information
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*
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* Copyright (C) 2002 David S. Miller (davem@redhat.com)
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*/
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#ifndef _ASM_THREAD_INFO_H
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#define _ASM_THREAD_INFO_H
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#ifdef __KERNEL__
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#define NSWINS 7
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#define TI_FLAG_BYTE_FAULT_CODE 0
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#define TI_FLAG_FAULT_CODE_SHIFT 56
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#define TI_FLAG_BYTE_WSTATE 1
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#define TI_FLAG_WSTATE_SHIFT 48
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#define TI_FLAG_BYTE_NOERROR 2
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#define TI_FLAG_BYTE_NOERROR_SHIFT 40
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#define TI_FLAG_BYTE_FPDEPTH 3
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#define TI_FLAG_FPDEPTH_SHIFT 32
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#define TI_FLAG_BYTE_CWP 4
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#define TI_FLAG_CWP_SHIFT 24
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#define TI_FLAG_BYTE_WSAVED 5
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#define TI_FLAG_WSAVED_SHIFT 16
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#include <asm/page.h>
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#ifndef __ASSEMBLY__
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#include <asm/ptrace.h>
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#include <asm/types.h>
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struct task_struct;
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struct exec_domain;
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struct thread_info {
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/* D$ line 1 */
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struct task_struct *task;
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unsigned long flags;
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__u8 fpsaved[7];
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__u8 status;
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unsigned long ksp;
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/* D$ line 2 */
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unsigned long fault_address;
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struct pt_regs *kregs;
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struct exec_domain *exec_domain;
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int preempt_count; /* 0 => preemptable, <0 => BUG */
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__u8 new_child;
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__u8 current_ds;
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__u16 cpu;
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unsigned long *utraps;
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struct reg_window reg_window[NSWINS];
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unsigned long rwbuf_stkptrs[NSWINS];
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unsigned long gsr[7];
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unsigned long xfsr[7];
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struct restart_block restart_block;
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struct pt_regs *kern_una_regs;
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unsigned int kern_una_insn;
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unsigned long fpregs[(7 * 256) / sizeof(unsigned long)]
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__attribute__ ((aligned(64)));
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};
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#endif /* !(__ASSEMBLY__) */
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/* offsets into the thread_info struct for assembly code access */
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#define TI_TASK 0x00000000
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#define TI_FLAGS 0x00000008
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#define TI_FAULT_CODE (TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE)
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#define TI_WSTATE (TI_FLAGS + TI_FLAG_BYTE_WSTATE)
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#define TI_CWP (TI_FLAGS + TI_FLAG_BYTE_CWP)
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#define TI_FPDEPTH (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
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#define TI_WSAVED (TI_FLAGS + TI_FLAG_BYTE_WSAVED)
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#define TI_SYS_NOERROR (TI_FLAGS + TI_FLAG_BYTE_NOERROR)
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#define TI_FPSAVED 0x00000010
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#define TI_KSP 0x00000018
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#define TI_FAULT_ADDR 0x00000020
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#define TI_KREGS 0x00000028
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#define TI_EXEC_DOMAIN 0x00000030
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#define TI_PRE_COUNT 0x00000038
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#define TI_NEW_CHILD 0x0000003c
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#define TI_CURRENT_DS 0x0000003d
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#define TI_CPU 0x0000003e
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#define TI_UTRAPS 0x00000040
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#define TI_REG_WINDOW 0x00000048
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#define TI_RWIN_SPTRS 0x000003c8
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#define TI_GSR 0x00000400
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#define TI_XFSR 0x00000438
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#define TI_RESTART_BLOCK 0x00000470
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#define TI_KUNA_REGS 0x000004a0
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#define TI_KUNA_INSN 0x000004a8
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#define TI_FPREGS 0x000004c0
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/* We embed this in the uppermost byte of thread_info->flags */
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#define FAULT_CODE_WRITE 0x01 /* Write access, implies D-TLB */
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#define FAULT_CODE_DTLB 0x02 /* Miss happened in D-TLB */
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#define FAULT_CODE_ITLB 0x04 /* Miss happened in I-TLB */
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#define FAULT_CODE_WINFIXUP 0x08 /* Miss happened during spill/fill */
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#define FAULT_CODE_BLKCOMMIT 0x10 /* Use blk-commit ASI in copy_page */
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#define FAULT_CODE_BAD_RA 0x20 /* Bad RA for sun4v */
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#if PAGE_SHIFT == 13
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#define THREAD_SIZE (2*PAGE_SIZE)
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#define THREAD_SHIFT (PAGE_SHIFT + 1)
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#else /* PAGE_SHIFT == 13 */
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#define THREAD_SIZE PAGE_SIZE
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#define THREAD_SHIFT PAGE_SHIFT
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#endif /* PAGE_SHIFT == 13 */
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/*
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* macros/functions for gaining access to the thread information structure
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*/
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#ifndef __ASSEMBLY__
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.current_ds = ASI_P, \
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.exec_domain = &default_exec_domain, \
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.preempt_count = INIT_PREEMPT_COUNT, \
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.restart_block = { \
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.fn = do_no_restart_syscall, \
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}, \
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}
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#define init_thread_info (init_thread_union.thread_info)
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#define init_stack (init_thread_union.stack)
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/* how to get the thread information struct from C */
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register struct thread_info *current_thread_info_reg asm("g6");
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#define current_thread_info() (current_thread_info_reg)
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/* thread information allocation */
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#if PAGE_SHIFT == 13
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#define THREAD_SIZE_ORDER 1
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#else /* PAGE_SHIFT == 13 */
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#define THREAD_SIZE_ORDER 0
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#endif /* PAGE_SHIFT == 13 */
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#define __thread_flag_byte_ptr(ti) \
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((unsigned char *)(&((ti)->flags)))
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#define __cur_thread_flag_byte_ptr __thread_flag_byte_ptr(current_thread_info())
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#define get_thread_fault_code() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE])
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#define set_thread_fault_code(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val))
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#define get_thread_wstate() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE])
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#define set_thread_wstate(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val))
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#define get_thread_cwp() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP])
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#define set_thread_cwp(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
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#define get_thread_noerror() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR])
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#define set_thread_noerror(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR] = (val))
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#define get_thread_fpdepth() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
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#define set_thread_fpdepth(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
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#define get_thread_wsaved() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
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#define set_thread_wsaved(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val))
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#endif /* !(__ASSEMBLY__) */
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/*
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* Thread information flags, only 16 bits are available as we encode
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* other values into the upper 6 bytes.
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*
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* On trap return we need to test several values:
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*
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* user: need_resched, notify_resume, sigpending, wsaved
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* kernel: fpdepth
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*
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* So to check for work in the kernel case we simply load the fpdepth
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* byte out of the flags and test it. For the user case we encode the
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* lower 3 bytes of flags as follows:
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* ----------------------------------------
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* | wsaved | flags byte 1 | flags byte 2 |
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* ----------------------------------------
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* This optimizes the user test into:
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* ldx [%g6 + TI_FLAGS], REG1
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* sethi %hi(_TIF_USER_WORK_MASK), REG2
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* or REG2, %lo(_TIF_USER_WORK_MASK), REG2
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* andcc REG1, REG2, %g0
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* be,pt no_work_to_do
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* nop
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*/
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
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#define TIF_SIGPENDING 2 /* signal pending */
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#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
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/* flag bit 4 is available */
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#define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */
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/* flag bit 6 is available */
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#define TIF_32BIT 7 /* 32-bit binary */
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#define TIF_NOHZ 8 /* in adaptive nohz mode */
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#define TIF_SECCOMP 9 /* secure computing */
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#define TIF_SYSCALL_AUDIT 10 /* syscall auditing active */
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#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
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/* NOTE: Thread flags >= 12 should be ones we have no interest
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* in using in assembly, else we can't use the mask as
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* an immediate value in instructions such as andcc.
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*/
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/* flag bit 12 is available */
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#define TIF_MEMDIE 13 /* is terminating due to OOM killer */
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#define TIF_POLLING_NRFLAG 14
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#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
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#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
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#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
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#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
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#define _TIF_UNALIGNED (1<<TIF_UNALIGNED)
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#define _TIF_32BIT (1<<TIF_32BIT)
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#define _TIF_NOHZ (1<<TIF_NOHZ)
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#define _TIF_SECCOMP (1<<TIF_SECCOMP)
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#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
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#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
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#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
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#define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \
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_TIF_DO_NOTIFY_RESUME_MASK | \
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_TIF_NEED_RESCHED)
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#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING)
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#define is_32bit_task() (test_thread_flag(TIF_32BIT))
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/*
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* Thread-synchronous status.
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*
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* This is different from the flags in that nobody else
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* ever touches our thread-synchronous status, so we don't
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* have to worry about atomic accesses.
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*
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* Note that there are only 8 bits available.
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*/
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#define TS_RESTORE_SIGMASK 0x0001 /* restore signal mask in do_signal() */
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#ifndef __ASSEMBLY__
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#define HAVE_SET_RESTORE_SIGMASK 1
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static inline void set_restore_sigmask(void)
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{
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struct thread_info *ti = current_thread_info();
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ti->status |= TS_RESTORE_SIGMASK;
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WARN_ON(!test_bit(TIF_SIGPENDING, &ti->flags));
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}
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static inline void clear_restore_sigmask(void)
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{
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current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
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}
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static inline bool test_restore_sigmask(void)
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{
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return current_thread_info()->status & TS_RESTORE_SIGMASK;
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}
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static inline bool test_and_clear_restore_sigmask(void)
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{
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struct thread_info *ti = current_thread_info();
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if (!(ti->status & TS_RESTORE_SIGMASK))
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return false;
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ti->status &= ~TS_RESTORE_SIGMASK;
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return true;
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}
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#define thread32_stack_is_64bit(__SP) (((__SP) & 0x1) != 0)
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#define test_thread_64bit_stack(__SP) \
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((test_thread_flag(TIF_32BIT) && !thread32_stack_is_64bit(__SP)) ? \
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false : true)
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#endif /* !__ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* _ASM_THREAD_INFO_H */
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