| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Aurelien Jacquiot | 2406 | 99.09% | 1 | 14.29% |
| Tejun Heo | 5 | 0.21% | 1 | 14.29% |
| Sergey Senozhatsky | 5 | 0.21% | 1 | 14.29% |
| Eric W. Biedermann | 4 | 0.16% | 1 | 14.29% |
| David Howells | 3 | 0.12% | 1 | 14.29% |
| Ingo Molnar | 3 | 0.12% | 1 | 14.29% |
| Thomas Gleixner | 2 | 0.08% | 1 | 14.29% |
| Total | 2428 | 7 |
// SPDX-License-Identifier: GPL-2.0-only /* * Port on Texas Instruments TMS320C6x architecture * * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) */ #include <linux/module.h> #include <linux/ptrace.h> #include <linux/sched/debug.h> #include <linux/bug.h> #include <asm/soc.h> #include <asm/special_insns.h> #include <asm/traps.h> int (*c6x_nmi_handler)(struct pt_regs *regs); void __init trap_init(void) { ack_exception(EXCEPT_TYPE_NXF); ack_exception(EXCEPT_TYPE_EXC); ack_exception(EXCEPT_TYPE_IXF); ack_exception(EXCEPT_TYPE_SXF); enable_exception(); } void show_regs(struct pt_regs *regs) { pr_err("\n"); show_regs_print_info(KERN_ERR); pr_err("PC: %08lx SP: %08lx\n", regs->pc, regs->sp); pr_err("Status: %08lx ORIG_A4: %08lx\n", regs->csr, regs->orig_a4); pr_err("A0: %08lx B0: %08lx\n", regs->a0, regs->b0); pr_err("A1: %08lx B1: %08lx\n", regs->a1, regs->b1); pr_err("A2: %08lx B2: %08lx\n", regs->a2, regs->b2); pr_err("A3: %08lx B3: %08lx\n", regs->a3, regs->b3); pr_err("A4: %08lx B4: %08lx\n", regs->a4, regs->b4); pr_err("A5: %08lx B5: %08lx\n", regs->a5, regs->b5); pr_err("A6: %08lx B6: %08lx\n", regs->a6, regs->b6); pr_err("A7: %08lx B7: %08lx\n", regs->a7, regs->b7); pr_err("A8: %08lx B8: %08lx\n", regs->a8, regs->b8); pr_err("A9: %08lx B9: %08lx\n", regs->a9, regs->b9); pr_err("A10: %08lx B10: %08lx\n", regs->a10, regs->b10); pr_err("A11: %08lx B11: %08lx\n", regs->a11, regs->b11); pr_err("A12: %08lx B12: %08lx\n", regs->a12, regs->b12); pr_err("A13: %08lx B13: %08lx\n", regs->a13, regs->b13); pr_err("A14: %08lx B14: %08lx\n", regs->a14, regs->dp); pr_err("A15: %08lx B15: %08lx\n", regs->a15, regs->sp); pr_err("A16: %08lx B16: %08lx\n", regs->a16, regs->b16); pr_err("A17: %08lx B17: %08lx\n", regs->a17, regs->b17); pr_err("A18: %08lx B18: %08lx\n", regs->a18, regs->b18); pr_err("A19: %08lx B19: %08lx\n", regs->a19, regs->b19); pr_err("A20: %08lx B20: %08lx\n", regs->a20, regs->b20); pr_err("A21: %08lx B21: %08lx\n", regs->a21, regs->b21); pr_err("A22: %08lx B22: %08lx\n", regs->a22, regs->b22); pr_err("A23: %08lx B23: %08lx\n", regs->a23, regs->b23); pr_err("A24: %08lx B24: %08lx\n", regs->a24, regs->b24); pr_err("A25: %08lx B25: %08lx\n", regs->a25, regs->b25); pr_err("A26: %08lx B26: %08lx\n", regs->a26, regs->b26); pr_err("A27: %08lx B27: %08lx\n", regs->a27, regs->b27); pr_err("A28: %08lx B28: %08lx\n", regs->a28, regs->b28); pr_err("A29: %08lx B29: %08lx\n", regs->a29, regs->b29); pr_err("A30: %08lx B30: %08lx\n", regs->a30, regs->b30); pr_err("A31: %08lx B31: %08lx\n", regs->a31, regs->b31); } void die(char *str, struct pt_regs *fp, int nr) { console_verbose(); pr_err("%s: %08x\n", str, nr); show_regs(fp); pr_err("Process %s (pid: %d, stackpage=%08lx)\n", current->comm, current->pid, (PAGE_SIZE + (unsigned long) current)); dump_stack(); while (1) ; } static void die_if_kernel(char *str, struct pt_regs *fp, int nr) { if (user_mode(fp)) return; die(str, fp, nr); } /* Internal exceptions */ static struct exception_info iexcept_table[10] = { { "Oops - instruction fetch", SIGBUS, BUS_ADRERR }, { "Oops - fetch packet", SIGBUS, BUS_ADRERR }, { "Oops - execute packet", SIGILL, ILL_ILLOPC }, { "Oops - undefined instruction", SIGILL, ILL_ILLOPC }, { "Oops - resource conflict", SIGILL, ILL_ILLOPC }, { "Oops - resource access", SIGILL, ILL_PRVREG }, { "Oops - privilege", SIGILL, ILL_PRVOPC }, { "Oops - loops buffer", SIGILL, ILL_ILLOPC }, { "Oops - software exception", SIGILL, ILL_ILLTRP }, { "Oops - unknown exception", SIGILL, ILL_ILLOPC } }; /* External exceptions */ static struct exception_info eexcept_table[128] = { { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - external exception", SIGBUS, BUS_ADRERR }, { "Oops - CPU memory protection fault", SIGSEGV, SEGV_ACCERR }, { "Oops - CPU memory protection fault in L1P", SIGSEGV, SEGV_ACCERR }, { "Oops - DMA memory protection fault in L1P", SIGSEGV, SEGV_ACCERR }, { "Oops - CPU memory protection fault in L1D", SIGSEGV, SEGV_ACCERR }, { "Oops - DMA memory protection fault in L1D", SIGSEGV, SEGV_ACCERR }, { "Oops - CPU memory protection fault in L2", SIGSEGV, SEGV_ACCERR }, { "Oops - DMA memory protection fault in L2", SIGSEGV, SEGV_ACCERR }, { "Oops - EMC CPU memory protection fault", SIGSEGV, SEGV_ACCERR }, { "Oops - EMC bus error", SIGBUS, BUS_ADRERR } }; static void do_trap(struct exception_info *except_info, struct pt_regs *regs) { unsigned long addr = instruction_pointer(regs); if (except_info->code != TRAP_BRKPT) pr_err("TRAP: %s PC[0x%lx] signo[%d] code[%d]\n", except_info->kernel_str, regs->pc, except_info->signo, except_info->code); die_if_kernel(except_info->kernel_str, regs, addr); force_sig_fault(except_info->signo, except_info->code, (void __user *)addr); } /* * Process an internal exception (non maskable) */ static int process_iexcept(struct pt_regs *regs) { unsigned int iexcept_report = get_iexcept(); unsigned int iexcept_num; ack_exception(EXCEPT_TYPE_IXF); pr_err("IEXCEPT: PC[0x%lx]\n", regs->pc); while (iexcept_report) { iexcept_num = __ffs(iexcept_report); iexcept_report &= ~(1 << iexcept_num); set_iexcept(iexcept_report); if (*(unsigned int *)regs->pc == BKPT_OPCODE) { /* This is a breakpoint */ struct exception_info bkpt_exception = { "Oops - undefined instruction", SIGTRAP, TRAP_BRKPT }; do_trap(&bkpt_exception, regs); iexcept_report &= ~(0xFF); set_iexcept(iexcept_report); continue; } do_trap(&iexcept_table[iexcept_num], regs); } return 0; } /* * Process an external exception (maskable) */ static void process_eexcept(struct pt_regs *regs) { int evt; pr_err("EEXCEPT: PC[0x%lx]\n", regs->pc); while ((evt = soc_get_exception()) >= 0) do_trap(&eexcept_table[evt], regs); ack_exception(EXCEPT_TYPE_EXC); } /* * Main exception processing */ asmlinkage int process_exception(struct pt_regs *regs) { unsigned int type; unsigned int type_num; unsigned int ie_num = 9; /* default is unknown exception */ while ((type = get_except_type()) != 0) { type_num = fls(type) - 1; switch (type_num) { case EXCEPT_TYPE_NXF: ack_exception(EXCEPT_TYPE_NXF); if (c6x_nmi_handler) (c6x_nmi_handler)(regs); else pr_alert("NMI interrupt!\n"); break; case EXCEPT_TYPE_IXF: if (process_iexcept(regs)) return 1; break; case EXCEPT_TYPE_EXC: process_eexcept(regs); break; case EXCEPT_TYPE_SXF: ie_num = 8; default: ack_exception(type_num); do_trap(&iexcept_table[ie_num], regs); break; } } return 0; } static int kstack_depth_to_print = 48; static void show_trace(unsigned long *stack, unsigned long *endstack) { unsigned long addr; int i; pr_debug("Call trace:"); i = 0; while (stack + 1 <= endstack) { addr = *stack++; /* * If the address is either in the text segment of the * kernel, or in the region which contains vmalloc'ed * memory, it *may* be the address of a calling * routine; if so, print it so that someone tracing * down the cause of the crash will be able to figure * out the call path that was taken. */ if (__kernel_text_address(addr)) { #ifndef CONFIG_KALLSYMS if (i % 5 == 0) pr_debug("\n "); #endif pr_debug(" [<%08lx>] %pS\n", addr, (void *)addr); i++; } } pr_debug("\n"); } void show_stack(struct task_struct *task, unsigned long *stack) { unsigned long *p, *endstack; int i; if (!stack) { if (task && task != current) /* We know this is a kernel stack, so this is the start/end */ stack = (unsigned long *)thread_saved_ksp(task); else stack = (unsigned long *)&stack; } endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE); pr_debug("Stack from %08lx:", (unsigned long)stack); for (i = 0, p = stack; i < kstack_depth_to_print; i++) { if (p + 1 > endstack) break; if (i % 8 == 0) pr_cont("\n "); pr_cont(" %08lx", *p++); } pr_cont("\n"); show_trace(stack, endstack); } int is_valid_bugaddr(unsigned long addr) { return __kernel_text_address(addr); }
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