X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/6601e61aa18bf4f09af135ff61fc7f4771d23b06..0c530ab8987f0ae6a1a3d9284f40182b88852816:/osfmk/i386/AT386/model_dep.c diff --git a/osfmk/i386/AT386/model_dep.c b/osfmk/i386/AT386/model_dep.c index 588e59611..b28fd974e 100644 --- a/osfmk/i386/AT386/model_dep.c +++ b/osfmk/i386/AT386/model_dep.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * @@ -62,7 +62,6 @@ #include #include -#include #include @@ -81,26 +80,39 @@ #include #include #include -#include #include -#include #include +#include +#include #include +#include /* inb() */ #include #if MACH_KDB #include #endif /* MACH_KDB */ +#include +#include +#include + #include #include +#include #include +#include + +#include + +#include +#include +#include +#include void enable_bluebox(void); void disable_bluebox(void); static void machine_conf(void); -#include extern int default_preemption_rate; extern int max_unsafe_quanta; @@ -108,6 +120,26 @@ extern int max_poll_quanta; extern int idlehalt; extern unsigned int panic_is_inited; +int db_run_mode; + +static int packAsc (uint8_t *inbuf, unsigned int length); + +volatile int pbtcpu = -1; +hw_lock_data_t pbtlock; /* backtrace print lock */ +uint32_t pbtcnt = 0; + +extern const char version[]; + +typedef struct _cframe_t { + struct _cframe_t *prev; + unsigned caller; + unsigned args[0]; +} cframe_t; + +void panic_i386_backtrace(void *_frame, int nframes); + +static unsigned panic_io_port = 0; + void machine_startup() { @@ -128,8 +160,8 @@ machine_startup() #if NOTYET hw_lock_init(&debugger_lock); /* initialize debugger lock */ - hw_lock_init(&pbtlock); /* initialize print backtrace lock */ #endif + hw_lock_init(&pbtlock); /* initialize print backtrace lock */ #if MACH_KDB /* @@ -170,6 +202,32 @@ machine_startup() if (PE_parse_boot_arg("idlehalt", &boot_arg)) { idlehalt = boot_arg; } +/* The I/O port to issue a read from, in the event of a panic. Useful for + * triggering logic analyzers. + */ + if (PE_parse_boot_arg("panic_io_port", &boot_arg)) { + /*I/O ports range from 0 through 0xFFFF */ + panic_io_port = boot_arg & 0xffff; + } + +/* + * fn is used to force napping. + * fn=0 means no napping allowed + * fn=1 means forces napping on, normal C2 and C4 transitions + * fn=2 means forces napping on, but C4 is disabled + * fn=3 means forces napping on, but use halt + * fn=4 means forces napping on and will always use C4 + * + * Note that this will take effect only when the system normally starts napping. + * + */ + + if (!PE_parse_boot_arg("fn", &forcenap)) forcenap = 0; /* If force nap not set, make 0 */ + else { + if(forcenap < 5) forcenap = forcenap + 1; /* See comments above for decode, this is set to fn + 1 */ + else forcenap = 0; /* Clear for error case */ + } + machine_nap_policy(); /* Make sure the nap policy reflects the user's choice */ machine_conf(); @@ -191,18 +249,363 @@ machine_conf(void) machine_info.memory_size = mem_size; } + +extern void *gPEEFIRuntimeServices; +extern void *gPEEFISystemTable; + +/*- + * COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or + * code or tables extracted from it, as desired without restriction. + * + * First, the polynomial itself and its table of feedback terms. The + * polynomial is + * X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0 + * + * Note that we take it "backwards" and put the highest-order term in + * the lowest-order bit. The X^32 term is "implied"; the LSB is the + * X^31 term, etc. The X^0 term (usually shown as "+1") results in + * the MSB being 1 + * + * Note that the usual hardware shift register implementation, which + * is what we're using (we're merely optimizing it by doing eight-bit + * chunks at a time) shifts bits into the lowest-order term. In our + * implementation, that means shifting towards the right. Why do we + * do it this way? Because the calculated CRC must be transmitted in + * order from highest-order term to lowest-order term. UARTs transmit + * characters in order from LSB to MSB. By storing the CRC this way + * we hand it to the UART in the order low-byte to high-byte; the UART + * sends each low-bit to hight-bit; and the result is transmission bit + * by bit from highest- to lowest-order term without requiring any bit + * shuffling on our part. Reception works similarly + * + * The feedback terms table consists of 256, 32-bit entries. Notes + * + * The table can be generated at runtime if desired; code to do so + * is shown later. It might not be obvious, but the feedback + * terms simply represent the results of eight shift/xor opera + * tions for all combinations of data and CRC register values + * + * The values must be right-shifted by eight bits by the "updcrc + * logic; the shift must be unsigned (bring in zeroes). On some + * hardware you could probably optimize the shift in assembler by + * using byte-swap instructions + * polynomial $edb88320 + * + * + * CRC32 code derived from work by Gary S. Brown. + */ + +static uint32_t crc32_tab[] = { + 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, + 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, + 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, + 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, + 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, + 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, + 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, + 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, + 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, + 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, + 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, + 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, + 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, + 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, + 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, + 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, + 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, + 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, + 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, + 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, + 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, + 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, + 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, + 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, + 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, + 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, + 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, + 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, + 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, + 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, + 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, + 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, + 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, + 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, + 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, + 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, + 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, + 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, + 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, + 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, + 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, + 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, + 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d +}; + +static uint32_t +crc32(uint32_t crc, const void *buf, size_t size) +{ + const uint8_t *p; + + p = buf; + crc = crc ^ ~0U; + + while (size--) + crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8); + + return crc ^ ~0U; +} + +static void +efi_set_tables_64(EFI_SYSTEM_TABLE_64 * system_table) +{ + EFI_RUNTIME_SERVICES_64 *runtime; + uint32_t hdr_cksum; + uint32_t cksum; + + kprintf("Processing 64-bit EFI tables at 0x%x\n", (unsigned int)system_table); + do { + if (system_table->Hdr.Signature != EFI_SYSTEM_TABLE_SIGNATURE) { + kprintf("Bad EFI system table signature\n"); + break; + } + // Verify signature of the system table + hdr_cksum = system_table->Hdr.CRC32; + system_table->Hdr.CRC32 = 0; + cksum = crc32(0L, system_table, system_table->Hdr.HeaderSize); + + //kprintf("System table calculated CRC32 = 0x%x, header = 0x%x\n", cksum, hdr_cksum); + system_table->Hdr.CRC32 = hdr_cksum; + if (cksum != hdr_cksum) { + kprintf("Bad EFI system table checksum\n"); + break; + } + + gPEEFISystemTable = system_table; + + kprintf("RuntimeServices table at 0x%qx\n", system_table->RuntimeServices); + runtime = (EFI_RUNTIME_SERVICES_64 *) (uint32_t)system_table->RuntimeServices; // XXX + kprintf("Checking runtime services table 0x%x\n", runtime); + if (runtime->Hdr.Signature != EFI_RUNTIME_SERVICES_SIGNATURE) { + kprintf("Bad EFI runtime table signature\n"); + break; + } + + // Verify signature of runtime services table + hdr_cksum = runtime->Hdr.CRC32; + runtime->Hdr.CRC32 = 0; + cksum = crc32(0L, runtime, runtime->Hdr.HeaderSize); + + //kprintf("Runtime table calculated CRC32 = 0x%x, header = 0x%x\n", cksum, hdr_cksum); + runtime->Hdr.CRC32 = hdr_cksum; + if (cksum != hdr_cksum) { + kprintf("Bad EFI runtime table checksum\n"); + break; + } + + gPEEFIRuntimeServices = runtime; + } + while (FALSE); +} + +static void +efi_set_tables_32(EFI_SYSTEM_TABLE * system_table) +{ + EFI_RUNTIME_SERVICES *runtime; + uint32_t hdr_cksum; + uint32_t cksum; + + kprintf("Processing 32-bit EFI tables at 0x%x\n", (unsigned int)system_table); + do { + if (system_table->Hdr.Signature != EFI_SYSTEM_TABLE_SIGNATURE) { + kprintf("Bad EFI system table signature\n"); + break; + } + // Verify signature of the system table + hdr_cksum = system_table->Hdr.CRC32; + system_table->Hdr.CRC32 = 0; + cksum = crc32(0L, system_table, system_table->Hdr.HeaderSize); + + //kprintf("System table calculated CRC32 = 0x%x, header = 0x%x\n", cksum, hdr_cksum); + system_table->Hdr.CRC32 = hdr_cksum; + if (cksum != hdr_cksum) { + kprintf("Bad EFI system table checksum\n"); + break; + } + + gPEEFISystemTable = system_table; + + runtime = (EFI_RUNTIME_SERVICES *) system_table->RuntimeServices; + if (runtime->Hdr.Signature != EFI_RUNTIME_SERVICES_SIGNATURE) { + kprintf("Bad EFI runtime table signature\n"); + break; + } + + // Verify signature of runtime services table + hdr_cksum = runtime->Hdr.CRC32; + runtime->Hdr.CRC32 = 0; + cksum = crc32(0L, runtime, runtime->Hdr.HeaderSize); + + //kprintf("Runtime table calculated CRC32 = 0x%x, header = 0x%x\n", cksum, hdr_cksum); + runtime->Hdr.CRC32 = hdr_cksum; + if (cksum != hdr_cksum) { + kprintf("Bad EFI runtime table checksum\n"); + break; + } + + gPEEFIRuntimeServices = runtime; + } + while (FALSE); +} + + +/* Map in EFI runtime areas. */ +static void +efi_init(void) +{ + boot_args *args = (boot_args *)PE_state.bootArgs; + + kprintf("Initializing EFI runtime services\n"); + + do + { + vm_offset_t vm_size, vm_addr; + vm_map_offset_t phys_addr; + EfiMemoryRange *mptr; + unsigned int msize, mcount; + unsigned int i; + + msize = args->MemoryMapDescriptorSize; + mcount = args->MemoryMapSize / msize; + + mptr = (EfiMemoryRange *)args->MemoryMap; + for (i=0; i < mcount; i++, mptr = (EfiMemoryRange *)(((vm_offset_t)mptr) + msize)) { + if (((mptr->Attribute & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) ) { + vm_size = i386_ptob((uint32_t)mptr->NumberOfPages); + vm_addr = (vm_offset_t) mptr->VirtualStart; + phys_addr = (vm_map_offset_t) mptr->PhysicalStart; + pmap_map(vm_addr, phys_addr, phys_addr + round_page(vm_size), + (mptr->Type == kEfiRuntimeServicesCode) ? VM_PROT_READ | VM_PROT_EXECUTE : VM_PROT_READ|VM_PROT_WRITE, + (mptr->Type == EfiMemoryMappedIO) ? VM_WIMG_IO : VM_WIMG_USE_DEFAULT); + } + } + + if (args->Version > 1) + panic("Incompatible boot args version %d\n", args->Version); + + kprintf("Boot args version %d revision %d mode %d\n", args->Version, args->Revision, args->efiMode); + if (args->Revision >= 4 && args->efiMode == kBootArgsEfiMode64) { + efi_set_tables_64((EFI_SYSTEM_TABLE_64 *) args->efiSystemTable); + } else { + efi_set_tables_32((EFI_SYSTEM_TABLE *) args->efiSystemTable); + } + } + while (FALSE); + + return; +} + +/* Remap EFI runtime areas. */ +void +hibernate_newruntime_map(void * map, vm_size_t map_size, uint32_t system_table_offset) +{ + boot_args *args = (boot_args *)PE_state.bootArgs; + + kprintf("Reinitializing EFI runtime services\n"); + + if (args->Revision < 3) + return; + do + { + vm_offset_t vm_size, vm_addr; + vm_map_offset_t phys_addr; + EfiMemoryRange *mptr; + unsigned int msize, mcount; + unsigned int i; + + gPEEFISystemTable = 0; + gPEEFIRuntimeServices = 0; + + system_table_offset += ptoa_32(args->efiRuntimeServicesPageStart); + + kprintf("Old system table %p, new %p\n", + args->efiSystemTable, (void *) system_table_offset); + + args->efiSystemTable = (uint32_t) system_table_offset; + + kprintf("Old map:\n"); + msize = args->MemoryMapDescriptorSize; + mcount = args->MemoryMapSize / msize; + mptr = (EfiMemoryRange *)args->MemoryMap; + for (i=0; i < mcount; i++, mptr = (EfiMemoryRange *)(((vm_offset_t)mptr) + msize)) { + if ((mptr->Attribute & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) { + + vm_size = i386_ptob((uint32_t)mptr->NumberOfPages); + vm_addr = (vm_offset_t) mptr->VirtualStart; + phys_addr = (vm_map_offset_t) mptr->PhysicalStart; + + kprintf("mapping[%d] %qx @ %x, %x\n", mptr->Type, phys_addr, vm_addr, mptr->NumberOfPages); + } + } + + pmap_remove(kernel_pmap, i386_ptob(args->efiRuntimeServicesPageStart), + i386_ptob(args->efiRuntimeServicesPageStart + args->efiRuntimeServicesPageCount)); + + kprintf("New map:\n"); + msize = args->MemoryMapDescriptorSize; + mcount = map_size / msize; + mptr = map; + for (i=0; i < mcount; i++, mptr = (EfiMemoryRange *)(((vm_offset_t)mptr) + msize)) { + if ((mptr->Attribute & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) { + + vm_size = i386_ptob((uint32_t)mptr->NumberOfPages); + vm_addr = (vm_offset_t) mptr->VirtualStart; + phys_addr = (vm_map_offset_t) mptr->PhysicalStart; + + kprintf("mapping[%d] %qx @ %x, %x\n", mptr->Type, phys_addr, vm_addr, mptr->NumberOfPages); + + pmap_map(vm_addr, phys_addr, phys_addr + round_page(vm_size), + (mptr->Type == kEfiRuntimeServicesCode) ? VM_PROT_READ | VM_PROT_EXECUTE : VM_PROT_READ|VM_PROT_WRITE, + (mptr->Type == EfiMemoryMappedIO) ? VM_WIMG_IO : VM_WIMG_USE_DEFAULT); + } + } + + if (args->Version > 1) + panic("Incompatible boot args version %d\n", args->Version); + + kprintf("Boot args version %d revision %d mode %d\n", args->Version, args->Revision, args->efiMode); + if (args->Revision >= 4 && args->efiMode == kBootArgsEfiMode64) { + efi_set_tables_64((EFI_SYSTEM_TABLE_64 *) args->efiSystemTable); + } else { + efi_set_tables_32((EFI_SYSTEM_TABLE *) args->efiSystemTable); + } + } + while (FALSE); + + kprintf("Done reinitializing EFI runtime services\n"); + + return; +} + /* * Find devices. The system is alive. */ void machine_init(void) { + /* Ensure panic buffer is initialized. */ + debug_log_init(); + /* * Display CPU identification */ - cpuid_cpu_display("CPU identification", 0); - cpuid_feature_display("CPU features", 0); + cpuid_cpu_display("CPU identification"); + cpuid_feature_display("CPU features"); + cpuid_extfeature_display("CPU extended features"); + /* + * Initialize EFI runtime services. + */ + efi_init(); smp_init(); @@ -250,14 +653,6 @@ void halt_all_cpus(boolean_t reboot) { if (reboot) { - /* - * Tell the BIOS not to clear and test memory. - */ -#if 0 /* XXX fixme */ - if (!reset_mem_on_reboot) - *(unsigned short *)phystokv(0x472) = 0x1234; -#endif - printf("MACH Reboot\n"); PEHaltRestart( kPERestartCPU ); } else { @@ -267,37 +662,128 @@ halt_all_cpus(boolean_t reboot) while(1); } -/*XXX*/ -void fc_get(mach_timespec_t *ts); -#include -extern kern_return_t sysclk_gettime( - mach_timespec_t *cur_time); -void fc_get(mach_timespec_t *ts) { - (void )sysclk_gettime(ts); +/* Issue an I/O port read if one has been requested - this is an event logic + * analyzers can use as a trigger point. + */ + +void +panic_io_port_read(void) { + if (panic_io_port) + (void)inb(panic_io_port); +} + +/* For use with the MP rendezvous mechanism + */ + +static void +machine_halt_cpu(__unused void *arg) { + panic_io_port_read(); + __asm__ volatile("hlt"); } void Debugger( const char *message) { + unsigned long pi_size = 0; + void *stackptr; + hw_atomic_add(&debug_mode, 1); if (!panic_is_inited) { postcode(PANIC_HLT); asm("hlt"); } + printf("Debugger called: <%s>\n", message); kprintf("Debugger called: <%s>\n", message); - draw_panic_dialog(); + /* + * Skip the graphical panic box if no panic string. + * This is the case if we're being called from + * host_reboot(,HOST_REBOOT_DEBUGGER) + * as a quiet way into the debugger. + */ + + if (panicstr) { + disable_preemption(); + +/* Issue an I/O port read if one has been requested - this is an event logic + * analyzers can use as a trigger point. + */ + panic_io_port_read(); + + /* Obtain current frame pointer */ + __asm__ volatile("movl %%ebp, %0" : "=m" (stackptr)); + + /* Print backtrace - callee is internally synchronized */ + panic_i386_backtrace(stackptr, 16); + + /* everything should be printed now so copy to NVRAM + */ + + if( debug_buf_size > 0) { + /* Do not compress the panic log + * or save to NVRAM unless kernel debugging + * is disabled. The NVRAM shim doesn't + * sync to the store until haltRestart is called. + */ + if (!panicDebugging) { + unsigned int bufpos; + + debug_putc(0); + + /* Now call the compressor */ + /* XXX Consider using the WKdm compressor in the + * future, rather than just packing - would need to + * be co-ordinated with crashreporter, which decodes + * this post-restart. + */ + bufpos = packAsc ((uint8_t *)debug_buf, + (unsigned int) (debug_buf_ptr - debug_buf) ); + /* If compression was successful, + * use the compressed length + */ + if (bufpos) { + debug_buf_ptr = debug_buf + bufpos; + } + /* Save panic log to non-volatile store + * Panic info handler must truncate data that is + * too long for this platform. + * This call must save data synchronously, + * since we can subsequently halt the system. + */ + pi_size = debug_buf_ptr - debug_buf; + pi_size = PESavePanicInfo((unsigned char *)debug_buf, + pi_size ); + } + } + draw_panic_dialog(); + + if (!panicDebugging) { + /* Clear the MP rendezvous function lock, in the event + * that a panic occurred while in that codepath. + */ + mp_rendezvous_break_lock(); + /* Force all CPUs to disable interrupts and HLT. + * We've panicked, and shouldn't depend on the + * PEHaltRestart() mechanism, which relies on several + * bits of infrastructure. + */ + mp_rendezvous_no_intrs(machine_halt_cpu, NULL); + /* NOT REACHED */ + } + } __asm__("int3"); + hw_atomic_sub(&debug_mode, 1); } void enable_bluebox(void) { } + void disable_bluebox(void) { @@ -310,3 +796,257 @@ machine_boot_info(char *buf, __unused vm_size_t size) return buf; } + +struct pasc { + unsigned a: 7; + unsigned b: 7; + unsigned c: 7; + unsigned d: 7; + unsigned e: 7; + unsigned f: 7; + unsigned g: 7; + unsigned h: 7; +} __attribute__((packed)); + +typedef struct pasc pasc_t; + +static int packAsc (unsigned char *inbuf, unsigned int length) +{ + unsigned int i, j = 0; + unsigned int extra; + pasc_t pack; + + for (i = 0; i < length; i+=8) + { + pack.a = inbuf[i]; + pack.b = inbuf[i+1]; + pack.c = inbuf[i+2]; + pack.d = inbuf[i+3]; + pack.e = inbuf[i+4]; + pack.f = inbuf[i+5]; + pack.g = inbuf[i+6]; + pack.h = inbuf[i+7]; + bcopy ((char *) &pack, inbuf + j, 7); + j += 7; + } + extra = (i - length); + if (extra > 0) { + inbuf[j - extra] &= (0xFF << (8-extra)); + } + return j-((extra == 7) ? 6 : extra); +} + +/* Routines for address - symbol translation. Not called unless the "keepsyms" + * boot-arg is supplied. + */ + +static int +panic_print_macho_symbol_name(struct mach_header *mh, vm_address_t search) +{ + struct nlist *sym = NULL; + struct load_command *cmd; + struct segment_command *orig_ts = NULL, *orig_le = NULL; + struct symtab_command *orig_st = NULL; + unsigned int i; + char *strings, *bestsym = NULL; + vm_address_t bestaddr = 0, diff, curdiff; + + if (mh->magic != MH_MAGIC) { + /* bad magic number */ + return 0; + } + + cmd = (struct load_command *) &mh[1]; + for (i = 0; i < mh->ncmds; i++) { + if (cmd->cmd == LC_SEGMENT) { + struct segment_command *orig_sg = (struct segment_command *) cmd; + + if (strcmp(SEG_TEXT, orig_sg->segname) == 0) + orig_ts = orig_sg; + else if (strcmp(SEG_LINKEDIT, orig_sg->segname) == 0) + orig_le = orig_sg; + else if (strcmp("", orig_sg->segname) == 0) + orig_ts = orig_sg; /* kexts have a single unnamed segment */ + } + else if (cmd->cmd == LC_SYMTAB) + orig_st = (struct symtab_command *) cmd; + + cmd = (struct load_command *) ((caddr_t) cmd + cmd->cmdsize); + } + + if ((orig_ts == NULL) || (orig_st == NULL) || (orig_le == NULL)) + return 0; + + /* kexts don't have a LINKEDIT segment for now, so we'll never get this far for kexts */ + + vm_address_t slide = ((vm_address_t)mh) - orig_ts->vmaddr; + if (slide != 0) + search -= slide; /* adjusting search since the binary has slid */ + + if ((search < orig_ts->vmaddr) || + (search >= orig_ts->vmaddr + orig_ts->vmsize)) { + /* search out of range for this mach header */ + return 0; + } + + sym = (struct nlist *)orig_le->vmaddr; + strings = ((char *)sym) + orig_st->nsyms * sizeof(struct nlist); + diff = search; + + for (i = 0; i < orig_st->nsyms; i++) { + if (sym[i].n_value <= search) { + curdiff = search - (vm_address_t)sym[i].n_value; + if (curdiff < diff) { + diff = curdiff; + bestaddr = sym[i].n_value; + bestsym = strings + sym[i].n_un.n_strx; + } + } + } + + if (bestsym != NULL) { + if (diff != 0) { + kdb_printf("%s + 0x%08x ", bestsym, diff); + } else { + kdb_printf("%s ", bestsym); + } + return 1; + } + return 0; +} + +extern kmod_info_t * kmod; /* the list of modules */ + +static void +panic_print_kmod_symbol_name(vm_address_t search) +{ + kmod_info_t * current_kmod = kmod; + + while (current_kmod != NULL) { + if ((current_kmod->address <= search) && + (current_kmod->address + current_kmod->size > search)) + break; + current_kmod = current_kmod->next; + } + if (current_kmod != NULL) { + /* if kexts had symbol table loaded, we'd call search_symbol_name again; alas, they don't */ + kdb_printf("%s + %d ", current_kmod->name, search - current_kmod->address); + } +} + +extern struct mach_header _mh_execute_header; /* the kernel's mach header */ + +static void +panic_print_symbol_name(vm_address_t search) +{ + /* try searching in the kernel */ + if (panic_print_macho_symbol_name(&_mh_execute_header, search) == 0) { + /* that failed, now try to search for the right kext */ + panic_print_kmod_symbol_name(search); + } +} + +/* Generate a backtrace, given a frame pointer - this routine + * should walk the stack safely. The trace is appended to the panic log + * and conditionally, to the console. If the trace contains kernel module + * addresses, display the module name, load address and dependencies. + */ + +#define DUMPFRAMES 32 +#define PBT_TIMEOUT_CYCLES (5 * 1000 * 1000 * 1000ULL) +void +panic_i386_backtrace(void *_frame, int nframes) +{ + cframe_t *frame = (cframe_t *)_frame; + vm_offset_t raddrs[DUMPFRAMES]; + int frame_index; + volatile uint32_t *ppbtcnt = &pbtcnt; + uint64_t bt_tsc_timeout; + boolean_t keepsyms = FALSE; + + if(pbtcpu != cpu_number()) { + hw_atomic_add(&pbtcnt, 1); + /* Spin on print backtrace lock, which serializes output + * Continue anyway if a timeout occurs. + */ + hw_lock_to(&pbtlock, LockTimeOut*100); + pbtcpu = cpu_number(); + } + + PE_parse_boot_arg("keepsyms", &keepsyms); + + kdb_printf("Backtrace, " + "Format - Frame : Return Address (4 potential args on stack) "); + + for (frame_index = 0; frame_index < nframes; frame_index++) { + vm_offset_t curframep = (vm_offset_t) frame; + + if (!curframep) + break; + + if (curframep & 0x3) { + kdb_printf("Unaligned frame\n"); + goto invalid; + } + + if (!kvtophys(curframep) || + !kvtophys(curframep + sizeof(cframe_t))) { + kdb_printf("No mapping exists for frame pointer\n"); + goto invalid; + } + + kdb_printf("\n0x%x : 0x%x ", + frame, frame->caller); + if (frame_index < DUMPFRAMES) + raddrs[frame_index] = frame->caller; + + if (kvtophys((vm_offset_t)&(frame->args[3]))) + kdb_printf("(0x%x 0x%x 0x%x 0x%x) ", + frame->args[0], frame->args[1], + frame->args[2], frame->args[3]); + + /* Display address-symbol translation only if the "keepsyms" + * boot-arg is suppplied, since we unload LINKEDIT otherwise. + * This routine is potentially unsafe; also, function + * boundary identification is unreliable after a strip -x. + */ + if (keepsyms) + panic_print_symbol_name((vm_address_t)frame->caller); + + /* Stack grows downward */ + if (frame->prev < frame) { + frame = frame->prev; + goto invalid; + } + frame = frame->prev; + } + + if (frame_index >= nframes) + kdb_printf("\tBacktrace continues...\n"); + + goto out; + +invalid: + kdb_printf("Backtrace terminated-invalid frame pointer 0x%x\n",frame); +out: + + /* Identify kernel modules in the backtrace and display their + * load addresses and dependencies. This routine should walk + * the kmod list safely. + */ + if (frame_index) + kmod_dump((vm_offset_t *)&raddrs[0], frame_index); + + kdb_printf("\nKernel version:\n%s\n\n",version); + + /* Release print backtrace lock, to permit other callers in the + * event of panics on multiple processors. + */ + hw_lock_unlock(&pbtlock); + hw_atomic_sub(&pbtcnt, 1); + /* Wait for other processors to complete output + * Timeout and continue after PBT_TIMEOUT_CYCLES. + */ + bt_tsc_timeout = rdtsc64() + PBT_TIMEOUT_CYCLES; + while(*ppbtcnt && (rdtsc64() < bt_tsc_timeout)); +}