Date: Wed, 17 Mar 2010 08:56:13 +0000 (UTC) From: Juli Mallett <jmallett@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r205248 - user/jmallett/octeon/sys/mips/mips Message-ID: <201003170856.o2H8uDYb053511@svn.freebsd.org>
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Author: jmallett Date: Wed Mar 17 08:56:13 2010 New Revision: 205248 URL: http://svn.freebsd.org/changeset/base/205248 Log: As with page faults, for now emit something in the log about reserved instructions. Sponsored by: Packet Forensics Modified: user/jmallett/octeon/sys/mips/mips/trap.c Modified: user/jmallett/octeon/sys/mips/mips/trap.c ============================================================================== --- user/jmallett/octeon/sys/mips/mips/trap.c Wed Mar 17 08:55:29 2010 (r205247) +++ user/jmallett/octeon/sys/mips/mips/trap.c Wed Mar 17 08:56:13 2010 (r205248) @@ -104,6 +104,7 @@ int trap_debug = 1; extern unsigned onfault_table[]; +static void log_reserved_instruction(struct trapframe *); static void log_bad_page_fault(char *, struct trapframe *, int); static void log_frame_dump(struct trapframe *frame); static void get_mapping_info(vm_offset_t, pd_entry_t **, pt_entry_t **); @@ -883,6 +884,7 @@ dofault: } case T_RES_INST + T_USER: + log_reserved_instruction(trapframe); i = SIGILL; addr = trapframe->pc; break; @@ -1306,6 +1308,50 @@ get_mapping_info(vm_offset_t va, pd_entr *ptepp = ptep; } +static void +log_reserved_instruction(struct trapframe *frame) +{ + pt_entry_t *ptep; + pd_entry_t *pdep; + unsigned int *addr; + struct proc *p = curproc; + register_t pc; + +#ifdef SMP + printf("cpuid = %d\n", PCPU_GET(cpuid)); +#endif + pc = frame->pc + (DELAYBRANCH(frame->cause) ? 4 : 0); + log(LOG_ERR, "RES_INST: pid %d (%s), uid %d: pc %p ra %p\n", + p->p_pid, p->p_comm, + p->p_ucred ? p->p_ucred->cr_uid : -1, + (void *)(intptr_t)pc, + (void *)(intptr_t)frame->ra); + + /* log registers in trap frame */ + log_frame_dump(frame); + + get_mapping_info((vm_offset_t)pc, &pdep, &ptep); + + /* + * Dump a few words around faulting instruction, if the addres is + * valid. + */ + if (!(pc & 3) && + useracc((caddr_t)(intptr_t)pc, sizeof(int) * 4, VM_PROT_READ)) { + /* dump page table entry for faulting instruction */ + log(LOG_ERR, "Page table info for pc address %p: pde = %p, pte = 0x%lx\n", + (void *)(intptr_t)pc, *pdep, ptep ? *ptep : 0); + + addr = (unsigned int *)(intptr_t)pc; + log(LOG_ERR, "Dumping 4 words starting at pc address %p: \n", + addr); + log(LOG_ERR, "%08x %08x %08x %08x\n", + addr[0], addr[1], addr[2], addr[3]); + } else { + log(LOG_ERR, "pc address %p is inaccessible, pde = 0x%p, pte = 0x%lx\n", + (void *)(intptr_t)pc, *pdep, ptep ? *ptep : 0); + } +} static void log_bad_page_fault(char *msg, struct trapframe *frame, int trap_type)
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