^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * License. See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 1994 - 1999, 2000 by Ralf Baechle and others.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2005, 2006 by Ralf Baechle (ralf@linux-mips.org)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (C) 2004 Thiemo Seufer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Copyright (C) 2013 Imagination Technologies Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/sched/debug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/sched/task.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/sched/task_stack.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/tick.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/stddef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/personality.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/sys.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/kallsyms.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/random.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/prctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/nmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <asm/abi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <asm/asm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <asm/bootinfo.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <asm/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <asm/dsemul.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <asm/dsp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <asm/fpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <asm/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <asm/mips-cps.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <asm/msa.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <asm/mipsregs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <asm/processor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include <asm/reg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include <asm/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #include <asm/isadep.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #include <asm/inst.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include <asm/stacktrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include <asm/irq_regs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #include <asm/exec.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #ifdef CONFIG_HOTPLUG_CPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) void arch_cpu_idle_dead(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) play_dead();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) asmlinkage void ret_from_fork(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) asmlinkage void ret_from_kernel_thread(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) unsigned long status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* New thread loses kernel privileges. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) status = regs->cp0_status & ~(ST0_CU0|ST0_CU1|ST0_CU2|ST0_FR|KU_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) status |= KU_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) regs->cp0_status = status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) lose_fpu(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) clear_thread_flag(TIF_MSA_CTX_LIVE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) clear_used_math();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #ifdef CONFIG_MIPS_FP_SUPPORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) atomic_set(¤t->thread.bd_emu_frame, BD_EMUFRAME_NONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) init_dsp();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) regs->cp0_epc = pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) regs->regs[29] = sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) void exit_thread(struct task_struct *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * User threads may have allocated a delay slot emulation frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * If so, clean up that allocation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (!(current->flags & PF_KTHREAD))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) dsemul_thread_cleanup(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * Save any process state which is live in hardware registers to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * parent context prior to duplication. This prevents the new child
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * state becoming stale if the parent is preempted before copy_thread()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * gets a chance to save the parent's live hardware registers to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * child context.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (is_msa_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) save_msa(current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) else if (is_fpu_owner())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) _save_fp(current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) save_dsp(current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) *dst = *src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * Copy architecture-specific thread state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) int copy_thread(unsigned long clone_flags, unsigned long usp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) unsigned long kthread_arg, struct task_struct *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) unsigned long tls)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) struct thread_info *ti = task_thread_info(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct pt_regs *childregs, *regs = current_pt_regs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) unsigned long childksp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) childksp = (unsigned long)task_stack_page(p) + THREAD_SIZE - 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /* set up new TSS. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) childregs = (struct pt_regs *) childksp - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) /* Put the stack after the struct pt_regs. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) childksp = (unsigned long) childregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) p->thread.cp0_status = (read_c0_status() & ~(ST0_CU2|ST0_CU1)) | ST0_KERNEL_CUMASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (unlikely(p->flags & PF_KTHREAD)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /* kernel thread */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) unsigned long status = p->thread.cp0_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) memset(childregs, 0, sizeof(struct pt_regs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) ti->addr_limit = KERNEL_DS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) p->thread.reg16 = usp; /* fn */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) p->thread.reg17 = kthread_arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) p->thread.reg29 = childksp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) p->thread.reg31 = (unsigned long) ret_from_kernel_thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) status = (status & ~(ST0_KUP | ST0_IEP | ST0_IEC)) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) ((status & (ST0_KUC | ST0_IEC)) << 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) status |= ST0_EXL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) childregs->cp0_status = status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /* user thread */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) *childregs = *regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) childregs->regs[7] = 0; /* Clear error flag */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) childregs->regs[2] = 0; /* Child gets zero as return value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (usp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) childregs->regs[29] = usp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) ti->addr_limit = USER_DS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) p->thread.reg29 = (unsigned long) childregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) p->thread.reg31 = (unsigned long) ret_from_fork;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) * New tasks lose permission to use the fpu. This accelerates context
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) * switching for most programs since they don't use the fpu.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) childregs->cp0_status &= ~(ST0_CU2|ST0_CU1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) clear_tsk_thread_flag(p, TIF_USEDFPU);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) clear_tsk_thread_flag(p, TIF_USEDMSA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) clear_tsk_thread_flag(p, TIF_MSA_CTX_LIVE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) #ifdef CONFIG_MIPS_MT_FPAFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) clear_tsk_thread_flag(p, TIF_FPUBOUND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) #endif /* CONFIG_MIPS_MT_FPAFF */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) #ifdef CONFIG_MIPS_FP_SUPPORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) atomic_set(&p->thread.bd_emu_frame, BD_EMUFRAME_NONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (clone_flags & CLONE_SETTLS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) ti->tp_value = tls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) #ifdef CONFIG_STACKPROTECTOR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) #include <linux/stackprotector.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) unsigned long __stack_chk_guard __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) EXPORT_SYMBOL(__stack_chk_guard);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) struct mips_frame_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) void *func;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) unsigned long func_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) int frame_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) int pc_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) #define J_TARGET(pc,target) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) (((unsigned long)(pc) & 0xf0000000) | ((target) << 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static inline int is_ra_save_ins(union mips_instruction *ip, int *poff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) #ifdef CONFIG_CPU_MICROMIPS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * swsp ra,offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * swm16 reglist,offset(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * swm32 reglist,offset(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) * sw32 ra,offset(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) * jradiussp - NOT SUPPORTED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) * microMIPS is way more fun...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (mm_insn_16bit(ip->word >> 16)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) switch (ip->mm16_r5_format.opcode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) case mm_swsp16_op:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (ip->mm16_r5_format.rt != 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) *poff = ip->mm16_r5_format.imm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) *poff = (*poff << 2) / sizeof(ulong);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) case mm_pool16c_op:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) switch (ip->mm16_m_format.func) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) case mm_swm16_op:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) *poff = ip->mm16_m_format.imm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) *poff += 1 + ip->mm16_m_format.rlist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) *poff = (*poff << 2) / sizeof(ulong);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) switch (ip->i_format.opcode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) case mm_sw32_op:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (ip->i_format.rs != 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (ip->i_format.rt != 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) *poff = ip->i_format.simmediate / sizeof(ulong);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) case mm_pool32b_op:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) switch (ip->mm_m_format.func) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) case mm_swm32_func:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (ip->mm_m_format.rd < 0x10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) if (ip->mm_m_format.base != 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) *poff = ip->mm_m_format.simmediate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) *poff += (ip->mm_m_format.rd & 0xf) * sizeof(u32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) *poff /= sizeof(ulong);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) /* sw / sd $ra, offset($sp) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if ((ip->i_format.opcode == sw_op || ip->i_format.opcode == sd_op) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) ip->i_format.rs == 29 && ip->i_format.rt == 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) *poff = ip->i_format.simmediate / sizeof(ulong);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) #ifdef CONFIG_CPU_LOONGSON64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if ((ip->loongson3_lswc2_format.opcode == swc2_op) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) (ip->loongson3_lswc2_format.ls == 1) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) (ip->loongson3_lswc2_format.fr == 0) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) (ip->loongson3_lswc2_format.base == 29)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if (ip->loongson3_lswc2_format.rt == 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) *poff = ip->loongson3_lswc2_format.offset << 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (ip->loongson3_lswc2_format.rq == 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) *poff = (ip->loongson3_lswc2_format.offset << 1) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) static inline int is_jump_ins(union mips_instruction *ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) #ifdef CONFIG_CPU_MICROMIPS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * jr16,jrc,jalr16,jalr16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * jal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * jalr/jr,jalr.hb/jr.hb,jalrs,jalrs.hb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * jraddiusp - NOT SUPPORTED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * microMIPS is kind of more fun...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (mm_insn_16bit(ip->word >> 16)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if ((ip->mm16_r5_format.opcode == mm_pool16c_op &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) (ip->mm16_r5_format.rt & mm_jr16_op) == mm_jr16_op))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) if (ip->j_format.opcode == mm_j32_op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (ip->j_format.opcode == mm_jal32_op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) if (ip->r_format.opcode != mm_pool32a_op ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) ip->r_format.func != mm_pool32axf_op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return ((ip->u_format.uimmediate >> 6) & mm_jalr_op) == mm_jalr_op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (ip->j_format.opcode == j_op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (ip->j_format.opcode == jal_op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (ip->r_format.opcode != spec_op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) return ip->r_format.func == jalr_op || ip->r_format.func == jr_op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) static inline int is_sp_move_ins(union mips_instruction *ip, int *frame_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) #ifdef CONFIG_CPU_MICROMIPS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) unsigned short tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) * addiusp -imm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) * addius5 sp,-imm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) * addiu32 sp,sp,-imm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) * jradiussp - NOT SUPPORTED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) * microMIPS is not more fun...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) if (mm_insn_16bit(ip->word >> 16)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (ip->mm16_r3_format.opcode == mm_pool16d_op &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) ip->mm16_r3_format.simmediate & mm_addiusp_func) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) tmp = ip->mm_b0_format.simmediate >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) tmp = ((tmp & 0x1ff) ^ 0x100) - 0x100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if ((tmp + 2) < 4) /* 0x0,0x1,0x1fe,0x1ff are special */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) tmp ^= 0x100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) *frame_size = -(signed short)(tmp << 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) if (ip->mm16_r5_format.opcode == mm_pool16d_op &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) ip->mm16_r5_format.rt == 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) tmp = ip->mm16_r5_format.imm >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) *frame_size = -(signed short)(tmp & 0xf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (ip->mm_i_format.opcode == mm_addiu32_op &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) ip->mm_i_format.rt == 29 && ip->mm_i_format.rs == 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) *frame_size = -ip->i_format.simmediate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) /* addiu/daddiu sp,sp,-imm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (ip->i_format.rs != 29 || ip->i_format.rt != 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) if (ip->i_format.opcode == addiu_op ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) ip->i_format.opcode == daddiu_op) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) *frame_size = -ip->i_format.simmediate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) static int get_frame_info(struct mips_frame_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) bool is_mmips = IS_ENABLED(CONFIG_CPU_MICROMIPS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) union mips_instruction insn, *ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) const unsigned int max_insns = 128;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) unsigned int last_insn_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) bool saw_jump = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) info->pc_offset = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) info->frame_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) ip = (void *)msk_isa16_mode((ulong)info->func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (!ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) for (i = 0; i < max_insns; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) ip = (void *)ip + last_insn_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) if (is_mmips && mm_insn_16bit(ip->halfword[0])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) insn.word = ip->halfword[0] << 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) last_insn_size = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) } else if (is_mmips) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) insn.word = ip->halfword[0] << 16 | ip->halfword[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) last_insn_size = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) insn.word = ip->word;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) last_insn_size = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) if (!info->frame_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) is_sp_move_ins(&insn, &info->frame_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) } else if (!saw_jump && is_jump_ins(ip)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * If we see a jump instruction, we are finished
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * with the frame save.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * Some functions can have a shortcut return at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * the beginning of the function, so don't start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * looking for jump instruction until we see the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * frame setup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * The RA save instruction can get put into the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) * delay slot of the jump instruction, so look
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) * at the next instruction, too.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) saw_jump = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) if (info->pc_offset == -1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) is_ra_save_ins(&insn, &info->pc_offset))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (saw_jump)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (info->frame_size && info->pc_offset >= 0) /* nested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (info->pc_offset < 0) /* leaf */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) /* prologue seems bogus... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) static struct mips_frame_info schedule_mfi __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) #ifdef CONFIG_KALLSYMS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) static unsigned long get___schedule_addr(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) return kallsyms_lookup_name("__schedule");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) static unsigned long get___schedule_addr(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) union mips_instruction *ip = (void *)schedule;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) int max_insns = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) for (i = 0; i < max_insns; i++, ip++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (ip->j_format.opcode == j_op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) return J_TARGET(ip, ip->j_format.target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) static int __init frame_info_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) unsigned long size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) #ifdef CONFIG_KALLSYMS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) unsigned long ofs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) unsigned long addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) addr = get___schedule_addr();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (!addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) addr = (unsigned long)schedule;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) #ifdef CONFIG_KALLSYMS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) kallsyms_lookup_size_offset(addr, &size, &ofs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) schedule_mfi.func = (void *)addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) schedule_mfi.func_size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) get_frame_info(&schedule_mfi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) * Without schedule() frame info, result given by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) * thread_saved_pc() and get_wchan() are not reliable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) if (schedule_mfi.pc_offset < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) printk("Can't analyze schedule() prologue at %p\n", schedule);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) arch_initcall(frame_info_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) * Return saved PC of a blocked thread.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) static unsigned long thread_saved_pc(struct task_struct *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) struct thread_struct *t = &tsk->thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) /* New born processes are a special case */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) if (t->reg31 == (unsigned long) ret_from_fork)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) return t->reg31;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (schedule_mfi.pc_offset < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) return ((unsigned long *)t->reg29)[schedule_mfi.pc_offset];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) #ifdef CONFIG_KALLSYMS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) /* generic stack unwinding function */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) unsigned long notrace unwind_stack_by_address(unsigned long stack_page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) unsigned long *sp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) unsigned long pc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) unsigned long *ra)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) unsigned long low, high, irq_stack_high;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) struct mips_frame_info info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) unsigned long size, ofs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) struct pt_regs *regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) int leaf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (!stack_page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) * IRQ stacks start at IRQ_STACK_START
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) * task stacks at THREAD_SIZE - 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) low = stack_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if (!preemptible() && on_irq_stack(raw_smp_processor_id(), *sp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) high = stack_page + IRQ_STACK_START;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) irq_stack_high = high;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) high = stack_page + THREAD_SIZE - 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) irq_stack_high = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) * If we reached the top of the interrupt stack, start unwinding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) * the interrupted task stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) if (unlikely(*sp == irq_stack_high)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) unsigned long task_sp = *(unsigned long *)*sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) * Check that the pointer saved in the IRQ stack head points to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) * something within the stack of the current task
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) if (!object_is_on_stack((void *)task_sp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) * Follow pointer to tasks kernel stack frame where interrupted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) * state was saved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) regs = (struct pt_regs *)task_sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) pc = regs->cp0_epc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (!user_mode(regs) && __kernel_text_address(pc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) *sp = regs->regs[29];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) *ra = regs->regs[31];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) return pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) if (!kallsyms_lookup_size_offset(pc, &size, &ofs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) * Return ra if an exception occurred at the first instruction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) if (unlikely(ofs == 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) pc = *ra;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) *ra = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) return pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) info.func = (void *)(pc - ofs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) info.func_size = ofs; /* analyze from start to ofs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) leaf = get_frame_info(&info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) if (leaf < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) if (*sp < low || *sp + info.frame_size > high)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) if (leaf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) * For some extreme cases, get_frame_info() can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) * consider wrongly a nested function as a leaf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) * one. In that cases avoid to return always the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) * same value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) pc = pc != *ra ? *ra : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) pc = ((unsigned long *)(*sp))[info.pc_offset];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) *sp += info.frame_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) *ra = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) return __kernel_text_address(pc) ? pc : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) EXPORT_SYMBOL(unwind_stack_by_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) /* used by show_backtrace() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) unsigned long pc, unsigned long *ra)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) unsigned long stack_page = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) for_each_possible_cpu(cpu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) if (on_irq_stack(cpu, *sp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) stack_page = (unsigned long)irq_stack[cpu];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) if (!stack_page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) stack_page = (unsigned long)task_stack_page(task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) return unwind_stack_by_address(stack_page, sp, pc, ra);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) * get_wchan - a maintenance nightmare^W^Wpain in the ass ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) unsigned long get_wchan(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) unsigned long pc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) #ifdef CONFIG_KALLSYMS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) unsigned long sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) unsigned long ra = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (!task || task == current || task->state == TASK_RUNNING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) if (!task_stack_page(task))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) pc = thread_saved_pc(task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) #ifdef CONFIG_KALLSYMS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) sp = task->thread.reg29 + schedule_mfi.frame_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) while (in_sched_functions(pc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) pc = unwind_stack(task, &sp, pc, &ra);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) return pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) unsigned long mips_stack_top(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) unsigned long top = TASK_SIZE & PAGE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) if (IS_ENABLED(CONFIG_MIPS_FP_SUPPORT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) /* One page for branch delay slot "emulation" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) top -= PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) /* Space for the VDSO, data page & GIC user page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) top -= PAGE_ALIGN(current->thread.abi->vdso->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) top -= PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) top -= mips_gic_present() ? PAGE_SIZE : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) /* Space for cache colour alignment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) if (cpu_has_dc_aliases)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) top -= shm_align_mask + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) /* Space to randomize the VDSO base */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) if (current->flags & PF_RANDOMIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) top -= VDSO_RANDOMIZE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) return top;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) * Don't forget that the stack pointer must be aligned on a 8 bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) * boundary for 32-bits ABI and 16 bytes for 64-bits ABI.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) unsigned long arch_align_stack(unsigned long sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) sp -= get_random_int() & ~PAGE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) return sp & ALMASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) static DEFINE_PER_CPU(call_single_data_t, backtrace_csd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) static struct cpumask backtrace_csd_busy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) static void handle_backtrace(void *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) nmi_cpu_backtrace(get_irq_regs());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) cpumask_clear_cpu(smp_processor_id(), &backtrace_csd_busy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) static void raise_backtrace(cpumask_t *mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) call_single_data_t *csd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) for_each_cpu(cpu, mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) * If we previously sent an IPI to the target CPU & it hasn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) * cleared its bit in the busy cpumask then it didn't handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) * our previous IPI & it's not safe for us to reuse the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) * call_single_data_t.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) if (cpumask_test_and_set_cpu(cpu, &backtrace_csd_busy)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) pr_warn("Unable to send backtrace IPI to CPU%u - perhaps it hung?\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) csd = &per_cpu(backtrace_csd, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) csd->func = handle_backtrace;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) smp_call_function_single_async(cpu, csd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) void arch_trigger_cpumask_backtrace(const cpumask_t *mask, bool exclude_self)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) nmi_trigger_cpumask_backtrace(mask, exclude_self, raise_backtrace);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) int mips_get_process_fp_mode(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) int value = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) if (!test_tsk_thread_flag(task, TIF_32BIT_FPREGS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) value |= PR_FP_MODE_FR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) if (test_tsk_thread_flag(task, TIF_HYBRID_FPREGS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) value |= PR_FP_MODE_FRE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) return value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) static long prepare_for_fp_mode_switch(void *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) * This is icky, but we use this to simply ensure that all CPUs have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) * context switched, regardless of whether they were previously running
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) * kernel or user code. This ensures that no CPU that a mode-switching
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) * program may execute on keeps its FPU enabled (& in the old mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) * throughout the mode switch.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) int mips_set_process_fp_mode(struct task_struct *task, unsigned int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) const unsigned int known_bits = PR_FP_MODE_FR | PR_FP_MODE_FRE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) struct task_struct *t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) struct cpumask process_cpus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) /* If nothing to change, return right away, successfully. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) if (value == mips_get_process_fp_mode(task))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) /* Only accept a mode change if 64-bit FP enabled for o32. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) if (!IS_ENABLED(CONFIG_MIPS_O32_FP64_SUPPORT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) /* And only for o32 tasks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) if (IS_ENABLED(CONFIG_64BIT) && !test_thread_flag(TIF_32BIT_REGS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) /* Check the value is valid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) if (value & ~known_bits)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) /* Setting FRE without FR is not supported. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) if ((value & (PR_FP_MODE_FR | PR_FP_MODE_FRE)) == PR_FP_MODE_FRE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) /* Avoid inadvertently triggering emulation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) if ((value & PR_FP_MODE_FR) && raw_cpu_has_fpu &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) !(raw_current_cpu_data.fpu_id & MIPS_FPIR_F64))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) if ((value & PR_FP_MODE_FRE) && raw_cpu_has_fpu && !cpu_has_fre)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) /* FR = 0 not supported in MIPS R6 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) if (!(value & PR_FP_MODE_FR) && raw_cpu_has_fpu && cpu_has_mips_r6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) /* Indicate the new FP mode in each thread */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) for_each_thread(task, t) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) /* Update desired FP register width */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) if (value & PR_FP_MODE_FR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) clear_tsk_thread_flag(t, TIF_32BIT_FPREGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) set_tsk_thread_flag(t, TIF_32BIT_FPREGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) clear_tsk_thread_flag(t, TIF_MSA_CTX_LIVE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) /* Update desired FP single layout */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) if (value & PR_FP_MODE_FRE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) set_tsk_thread_flag(t, TIF_HYBRID_FPREGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) clear_tsk_thread_flag(t, TIF_HYBRID_FPREGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) * We need to ensure that all threads in the process have switched mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) * before returning, in order to allow userland to not worry about
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) * races. We can do this by forcing all CPUs that any thread in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) * process may be running on to schedule something else - in this case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) * prepare_for_fp_mode_switch().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) * We begin by generating a mask of all CPUs that any thread in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) * process may be running on.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) cpumask_clear(&process_cpus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) for_each_thread(task, t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) cpumask_set_cpu(task_cpu(t), &process_cpus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) * Now we schedule prepare_for_fp_mode_switch() on each of those CPUs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) * The CPUs may have rescheduled already since we switched mode or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) * generated the cpumask, but that doesn't matter. If the task in this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) * process is scheduled out then our scheduling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) * prepare_for_fp_mode_switch() will simply be redundant. If it's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) * scheduled in then it will already have picked up the new FP mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) * whilst doing so.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) get_online_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) for_each_cpu_and(cpu, &process_cpus, cpu_online_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) work_on_cpu(cpu, prepare_for_fp_mode_switch, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) put_online_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) #if defined(CONFIG_32BIT) || defined(CONFIG_MIPS32_O32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) void mips_dump_regs32(u32 *uregs, const struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) for (i = MIPS32_EF_R1; i <= MIPS32_EF_R31; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) /* k0/k1 are copied as zero. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) if (i == MIPS32_EF_R26 || i == MIPS32_EF_R27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) uregs[i] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) uregs[i] = regs->regs[i - MIPS32_EF_R0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) uregs[MIPS32_EF_LO] = regs->lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) uregs[MIPS32_EF_HI] = regs->hi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) uregs[MIPS32_EF_CP0_EPC] = regs->cp0_epc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) uregs[MIPS32_EF_CP0_BADVADDR] = regs->cp0_badvaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) uregs[MIPS32_EF_CP0_STATUS] = regs->cp0_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) uregs[MIPS32_EF_CP0_CAUSE] = regs->cp0_cause;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) #endif /* CONFIG_32BIT || CONFIG_MIPS32_O32 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) #ifdef CONFIG_64BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) void mips_dump_regs64(u64 *uregs, const struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) for (i = MIPS64_EF_R1; i <= MIPS64_EF_R31; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) /* k0/k1 are copied as zero. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) if (i == MIPS64_EF_R26 || i == MIPS64_EF_R27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) uregs[i] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) uregs[i] = regs->regs[i - MIPS64_EF_R0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) uregs[MIPS64_EF_LO] = regs->lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) uregs[MIPS64_EF_HI] = regs->hi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) uregs[MIPS64_EF_CP0_EPC] = regs->cp0_epc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) uregs[MIPS64_EF_CP0_BADVADDR] = regs->cp0_badvaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) uregs[MIPS64_EF_CP0_STATUS] = regs->cp0_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) uregs[MIPS64_EF_CP0_CAUSE] = regs->cp0_cause;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) #endif /* CONFIG_64BIT */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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