ifdef CONFIG_UNWIND_INFO
CFLAGS += -fasynchronous-unwind-tables
+LDFLAGS_vmlinux += --eh-frame-hdr
endif
ifdef CONFIG_DEBUG_INFO
# temporary until string.h is fixed
cflags-y += -ffreestanding
+# this works around some issues with generating unwind tables in older gccs
+# newer gccs do it by default
+cflags-y += -maccumulate-outgoing-args
+
# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
# a lot more stack due to the lack of sharing of stacklots:
CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then echo $(call cc-option,-fno-unit-at-a-time); fi ;)
AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
# is .cfi_signal_frame supported too?
-cflags-y += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
-AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
+cflags-y += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
+AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
CFLAGS += $(cflags-y)
#
# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.19-rc1
-# Thu Oct 5 13:04:53 2006
+# Linux kernel version: 2.6.19-rc2-git4
+# Sat Oct 21 03:38:56 2006
#
CONFIG_X86_32=y
CONFIG_GENERIC_TIME=y
CONFIG_INET6_XFRM_MODE_TUNNEL=y
# CONFIG_INET6_XFRM_MODE_BEET is not set
# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
+CONFIG_IPV6_SIT=y
# CONFIG_IPV6_TUNNEL is not set
-# CONFIG_IPV6_SUBTREES is not set
# CONFIG_IPV6_MULTIPLE_TABLES is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETFILTER is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
+#
+# Misc devices
+#
+# CONFIG_IBM_ASM is not set
+# CONFIG_SGI_IOC4 is not set
+# CONFIG_TIFM_CORE is not set
+
#
# ATA/ATAPI/MFM/RLL support
#
#
# Dallas's 1-wire bus
#
+# CONFIG_W1 is not set
#
# Hardware Monitoring support
# CONFIG_HWMON is not set
# CONFIG_HWMON_VID is not set
-#
-# Misc devices
-#
-# CONFIG_IBM_ASM is not set
-# CONFIG_TIFM_CORE is not set
-
#
# Multimedia devices
#
# CONFIG_USB_ATI_REMOTE2 is not set
# CONFIG_USB_KEYSPAN_REMOTE is not set
# CONFIG_USB_APPLETOUCH is not set
-# CONFIG_USB_TRANCEVIBRATOR is not set
#
# USB Imaging devices
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
+# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_TEST is not set
#
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
# CONFIG_EXT3_FS_SECURITY is not set
+# CONFIG_EXT4DEV_FS is not set
CONFIG_JBD=y
# CONFIG_JBD_DEBUG is not set
CONFIG_FS_MBCACHE=y
# CONFIG_AUTOFS_FS is not set
CONFIG_AUTOFS4_FS=y
# CONFIG_FUSE_FS is not set
+CONFIG_GENERIC_ACL=y
#
# CD-ROM/DVD Filesystems
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
# CONFIG_9P_FS is not set
-CONFIG_GENERIC_ACL=y
#
# Partition Types
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=y
-#
-# Distributed Lock Manager
-#
-
#
# Instrumentation Support
#
CONFIG_UNWIND_INFO=y
CONFIG_STACK_UNWIND=y
# CONFIG_FORCED_INLINING is not set
+# CONFIG_HEADERS_CHECK is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_LKDTM is not set
CONFIG_EARLY_PRINTK=y
movl %eax,%gs
lldt %ax
cld # gcc2 wants the direction flag cleared at all times
- pushl %eax # fake return address
+ pushl $0 # fake return address for unwinder
#ifdef CONFIG_SMP
movb ready, %cl
movb $1, ready
int cpu;
/* Enable NMI watchdog for newer systems.
- Actually it should be safe for most systems before 2004 too except
- for some IBM systems that corrupt registers when NMI happens
- during SMM. Unfortunately we don't have more exact information
- on these and use this coarse check. */
- if (nmi_watchdog == NMI_DEFAULT && dmi_get_year(DMI_BIOS_DATE) >= 2004)
+ Probably safe on most older systems too, but let's be careful.
+ IBM ThinkPads use INT10 inside SMM and that allows early NMI inside SMM
+ which hangs the system. Disable watchdog for all thinkpads */
+ if (nmi_watchdog == NMI_DEFAULT && dmi_get_year(DMI_BIOS_DATE) >= 2004 &&
+ !dmi_name_in_vendors("ThinkPad"))
nmi_watchdog = NMI_LOCAL_APIC;
if ((nmi_watchdog == NMI_NONE) || (nmi_watchdog == NMI_DEFAULT))
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
struct pt_regs regs;
- int err;
memset(®s, 0, sizeof(regs));
regs.eflags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
/* Ok, create the new process.. */
- err = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, NULL, NULL);
- if (err == 0) /* terminate kernel stack */
- task_pt_regs(current)->eip = 0;
- return err;
+ return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, NULL, NULL);
}
EXPORT_SYMBOL(kernel_thread);
cflags-y += $(call cc-option,-funit-at-a-time)
# prevent gcc from generating any FP code by mistake
cflags-y += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
+# this works around some issues with generating unwind tables in older gccs
+# newer gccs do it by default
+cflags-y += -maccumulate-outgoing-args
+
# do binutils support CFI?
cflags-y += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
#
# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.19-rc1
-# Thu Oct 5 13:04:43 2006
+# Linux kernel version: 2.6.19-rc2-git4
+# Sat Oct 21 03:38:52 2006
#
CONFIG_X86_64=y
CONFIG_64BIT=y
# CONFIG_INET6_XFRM_MODE_TUNNEL is not set
# CONFIG_INET6_XFRM_MODE_BEET is not set
# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
+CONFIG_IPV6_SIT=y
# CONFIG_IPV6_TUNNEL is not set
-# CONFIG_IPV6_SUBTREES is not set
# CONFIG_IPV6_MULTIPLE_TABLES is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETFILTER is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
+#
+# Misc devices
+#
+# CONFIG_IBM_ASM is not set
+# CONFIG_SGI_IOC4 is not set
+# CONFIG_TIFM_CORE is not set
+
#
# ATA/ATAPI/MFM/RLL support
#
#
# Dallas's 1-wire bus
#
+# CONFIG_W1 is not set
#
# Hardware Monitoring support
# CONFIG_SENSORS_HDAPS is not set
# CONFIG_HWMON_DEBUG_CHIP is not set
-#
-# Misc devices
-#
-# CONFIG_IBM_ASM is not set
-# CONFIG_TIFM_CORE is not set
-
#
# Multimedia devices
#
# CONFIG_USB_ATI_REMOTE2 is not set
# CONFIG_USB_KEYSPAN_REMOTE is not set
# CONFIG_USB_APPLETOUCH is not set
-# CONFIG_USB_TRANCEVIBRATOR is not set
#
# USB Imaging devices
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
+# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_TEST is not set
#
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
# CONFIG_EXT3_FS_SECURITY is not set
+# CONFIG_EXT4DEV_FS is not set
CONFIG_JBD=y
# CONFIG_JBD_DEBUG is not set
CONFIG_FS_MBCACHE=y
# CONFIG_AUTOFS_FS is not set
CONFIG_AUTOFS4_FS=y
# CONFIG_FUSE_FS is not set
+CONFIG_GENERIC_ACL=y
#
# CD-ROM/DVD Filesystems
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
# CONFIG_9P_FS is not set
-CONFIG_GENERIC_ACL=y
#
# Partition Types
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=y
-#
-# Distributed Lock Manager
-#
-
#
# Instrumentation Support
#
CONFIG_UNWIND_INFO=y
CONFIG_STACK_UNWIND=y
# CONFIG_FORCED_INLINING is not set
+# CONFIG_HEADERS_CHECK is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_LKDTM is not set
# CONFIG_DEBUG_RODATA is not set
/* various gunk below that needed for SMP startup */
if (addr < 0x8000) {
- *addrp = 0x8000;
+ *addrp = PAGE_ALIGN(0x8000);
return 1;
}
/* direct mapping tables of the kernel */
if (last >= table_start<<PAGE_SHIFT && addr < table_end<<PAGE_SHIFT) {
- *addrp = table_end << PAGE_SHIFT;
+ *addrp = PAGE_ALIGN(table_end << PAGE_SHIFT);
return 1;
}
#ifdef CONFIG_BLK_DEV_INITRD
if (LOADER_TYPE && INITRD_START && last >= INITRD_START &&
addr < INITRD_START+INITRD_SIZE) {
- *addrp = INITRD_START + INITRD_SIZE;
+ *addrp = PAGE_ALIGN(INITRD_START + INITRD_SIZE);
return 1;
}
#endif
/* kernel code */
- if (last >= __pa_symbol(&_text) && last < __pa_symbol(&_end)) {
- *addrp = __pa_symbol(&_end);
+ if (last >= __pa_symbol(&_text) && addr < __pa_symbol(&_end)) {
+ *addrp = PAGE_ALIGN(__pa_symbol(&_end));
return 1;
}
if (last >= ebda_addr && addr < ebda_addr + ebda_size) {
- *addrp = ebda_addr + ebda_size;
+ *addrp = PAGE_ALIGN(ebda_addr + ebda_size);
return 1;
}
continue;
while (bad_addr(&addr, size) && addr+size <= ei->addr+ei->size)
;
- last = addr + size;
+ last = PAGE_ALIGN(addr) + size;
if (last > ei->addr + ei->size)
continue;
if (last > end)
static void ati_bugs(void)
{
-#if 1 /* for testing */
- printk("ATI board detected\n");
-#endif
- /* No bugs right now */
+ if (timer_over_8254 == 1) {
+ timer_over_8254 = 0;
+ printk(KERN_INFO
+ "ATI board detected. Disabling timer routing over 8254.\n");
+ }
}
struct chipset {
LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */
RESTORE_REST
cmpq $__NR_syscall_max,%rax
+ movq $-ENOSYS,%rcx
+ cmova %rcx,%rax
ja 1f
movq %r10,%rcx /* fixup for C */
call *sys_call_table(,%rax,8)
1: incl %gs:pda_irqcount
cmoveq %gs:pda_irqstackptr,%rsp
push %rbp # backlink for old unwinder
- CFI_ADJUST_CFA_OFFSET 8
- CFI_REL_OFFSET rbp,0
/*
* We entered an interrupt context - irqs are off:
*/
call do_fork
movq %rax,RAX(%rsp)
xorl %edi,%edi
- test %rax,%rax
- jnz 1f
- /* terminate stack in child */
- movq %rdi,RIP(%rsp)
-1:
/*
* It isn't worth to check for reschedule here,
incl %gs:pda_irqcount
cmove %gs:pda_irqstackptr,%rsp
push %rbp # backlink for old unwinder
- CFI_ADJUST_CFA_OFFSET 8
call __do_softirq
leaveq
CFI_DEF_CFA_REGISTER rsp
static cpumask_t physflat_target_cpus(void)
{
- return cpumask_of_cpu(0);
+ return cpu_online_map;
}
static cpumask_t physflat_vector_allocation_domain(int cpu)
static int disable_timer_pin_1 __initdata;
-int timer_over_8254 __initdata = 0;
+int timer_over_8254 __initdata = 1;
/* Where if anywhere is the i8259 connect in external int mode */
static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
if (vector == IA32_SYSCALL_VECTOR)
goto next;
for_each_cpu_mask(new_cpu, domain)
- if (per_cpu(vector_irq, cpu)[vector] != -1)
+ if (per_cpu(vector_irq, new_cpu)[vector] != -1)
goto next;
/* Found one! */
for_each_cpu_mask(new_cpu, domain) {
- pos[cpu].vector = vector;
- pos[cpu].offset = offset;
+ pos[new_cpu].vector = vector;
+ pos[new_cpu].offset = offset;
}
if (old_vector >= 0) {
int old_cpu;
{
cpumask_t mask;
unsigned vector;
+ unsigned long flags;
+ spin_lock_irqsave(&vector_lock, flags);
vector = irq_vector[irq];
cpus_clear(mask);
- cpu_set(vector >> 8, mask);
+ cpu_set(first_cpu(irq_domain[irq]), mask);
- send_IPI_mask(mask, vector & 0xff);
+ send_IPI_mask(mask, vector);
+ spin_unlock_irqrestore(&vector_lock, flags);
return 1;
}
text PT_LOAD FLAGS(5); /* R_E */
data PT_LOAD FLAGS(7); /* RWE */
user PT_LOAD FLAGS(7); /* RWE */
+ data.init PT_LOAD FLAGS(7); /* RWE */
note PT_NOTE FLAGS(4); /* R__ */
}
SECTIONS
. = ALIGN(8192); /* init_task */
.data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
*(.data.init_task)
- } :data
+ }:data.init
. = ALIGN(4096);
.data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
return hotadd_percent > 0;
}
#else
-int update_end_of_memory(unsigned long end) {return 0;}
+int update_end_of_memory(unsigned long end) {return -1;}
static int hotadd_enough_memory(struct bootnode *nd) {return 1;}
#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
static inline int save_add_info(void) {return 1;}
push_node_boundaries(node, nd->start >> PAGE_SHIFT,
nd->end >> PAGE_SHIFT);
- if (ma->flags.hot_pluggable && !reserve_hotadd(node, start, end) < 0) {
+ if (ma->flags.hot_pluggable && (reserve_hotadd(node, start, end) < 0)) {
/* Ignore hotadd region. Undo damage */
printk(KERN_NOTICE "SRAT: Hotplug region ignored\n");
*nd = oldnode;
#
# Reuse the i386 PCI subsystem
#
-CFLAGS += -Iarch/i386/pci
+EXTRA_CFLAGS += -Iarch/i386/pci
obj-y := i386.o
obj-$(CONFIG_PCI_DIRECT)+= direct.o
}
EXPORT_SYMBOL(dmi_get_system_info);
+
+/**
+ * dmi_name_in_vendors - Check if string is anywhere in the DMI vendor information.
+ * @str: Case sensitive Name
+ */
+int dmi_name_in_vendors(char *str)
+{
+ static int fields[] = { DMI_BIOS_VENDOR, DMI_BIOS_VERSION, DMI_SYS_VENDOR,
+ DMI_PRODUCT_NAME, DMI_PRODUCT_VERSION, DMI_BOARD_VENDOR,
+ DMI_BOARD_NAME, DMI_BOARD_VERSION, DMI_NONE };
+ int i;
+ for (i = 0; fields[i] != DMI_NONE; i++) {
+ int f = fields[i];
+ if (dmi_ident[f] && strstr(dmi_ident[f], str))
+ return 1;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(dmi_name_in_vendors);
+
/**
* dmi_find_device - find onboard device by type/name
* @type: device type or %DMI_DEV_TYPE_ANY to match all device types
*(__param) \
VMLINUX_SYMBOL(__stop___param) = .; \
} \
+ \
+ /* Unwind data binary search table */ \
+ EH_FRAME_HDR \
+ \
__end_rodata = .; \
. = ALIGN(4096);
*(.kprobes.text) \
VMLINUX_SYMBOL(__kprobes_text_end) = .;
+#ifdef CONFIG_STACK_UNWIND
+ /* Unwind data binary search table */
+#define EH_FRAME_HDR \
+ .eh_frame_hdr : AT(ADDR(.eh_frame_hdr) - LOAD_OFFSET) { \
+ VMLINUX_SYMBOL(__start_unwind_hdr) = .; \
+ *(.eh_frame_hdr) \
+ VMLINUX_SYMBOL(__end_unwind_hdr) = .; \
+ }
+#else
+#define EH_FRAME_HDR
+#endif
+
/* DWARF debug sections.
Symbols in the DWARF debugging sections are relative to
the beginning of the section so we begin them at 0. */
{
pte_t pte;
pte_val(pte) = physpage | pgprot_val(pgprot);
+ pte_val(pte) &= __supported_pte_mask;
return pte;
}
extern int reboot_force;
extern int notsc_setup(char *);
+extern int timer_over_8254;
+
extern int gsi_irq_sharing(int gsi);
extern void smp_local_timer_interrupt(void);
struct dmi_device *from);
extern void dmi_scan_machine(void);
extern int dmi_get_year(int field);
+extern int dmi_name_in_vendors(char *str);
#else
static inline struct dmi_device * dmi_find_device(int type, const char *name,
struct dmi_device *from) { return NULL; }
static inline int dmi_get_year(int year) { return 0; }
+static inline int dmi_name_in_vendors(char *s) { return 0; }
#endif
* Initialize unwind support.
*/
extern void unwind_init(void);
+extern void unwind_setup(void);
#ifdef CONFIG_MODULES
struct unwind_frame_info {};
static inline void unwind_init(void) {}
+static inline void unwind_setup(void) {}
#ifdef CONFIG_MODULES
printk(KERN_NOTICE);
printk(linux_banner);
setup_arch(&command_line);
+ unwind_setup();
setup_per_cpu_areas();
smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
#include <linux/unwind.h>
#include <linux/module.h>
-#include <linux/delay.h>
+#include <linux/bootmem.h>
+#include <linux/sort.h>
#include <linux/stop_machine.h>
#include <asm/sections.h>
#include <asm/uaccess.h>
#include <asm/unaligned.h>
extern char __start_unwind[], __end_unwind[];
+extern const u8 __start_unwind_hdr[], __end_unwind_hdr[];
#define MAX_STACK_DEPTH 8
} core, init;
const void *address;
unsigned long size;
+ const unsigned char *header;
+ unsigned long hdrsz;
struct unwind_table *link;
const char *name;
} root_table;
return table;
}
+static unsigned long read_pointer(const u8 **pLoc,
+ const void *end,
+ signed ptrType);
+
static void init_unwind_table(struct unwind_table *table,
const char *name,
const void *core_start,
const void *init_start,
unsigned long init_size,
const void *table_start,
- unsigned long table_size)
+ unsigned long table_size,
+ const u8 *header_start,
+ unsigned long header_size)
{
+ const u8 *ptr = header_start + 4;
+ const u8 *end = header_start + header_size;
+
table->core.pc = (unsigned long)core_start;
table->core.range = core_size;
table->init.pc = (unsigned long)init_start;
table->init.range = init_size;
table->address = table_start;
table->size = table_size;
+ /* See if the linker provided table looks valid. */
+ if (header_size <= 4
+ || header_start[0] != 1
+ || (void *)read_pointer(&ptr, end, header_start[1]) != table_start
+ || header_start[2] == DW_EH_PE_omit
+ || read_pointer(&ptr, end, header_start[2]) <= 0
+ || header_start[3] == DW_EH_PE_omit)
+ header_start = NULL;
+ table->hdrsz = header_size;
+ smp_wmb();
+ table->header = header_start;
table->link = NULL;
table->name = name;
}
init_unwind_table(&root_table, "kernel",
_text, _end - _text,
NULL, 0,
- __start_unwind, __end_unwind - __start_unwind);
+ __start_unwind, __end_unwind - __start_unwind,
+ __start_unwind_hdr, __end_unwind_hdr - __start_unwind_hdr);
+}
+
+static const u32 bad_cie, not_fde;
+static const u32 *cie_for_fde(const u32 *fde, const struct unwind_table *);
+static signed fde_pointer_type(const u32 *cie);
+
+struct eh_frame_hdr_table_entry {
+ unsigned long start, fde;
+};
+
+static int cmp_eh_frame_hdr_table_entries(const void *p1, const void *p2)
+{
+ const struct eh_frame_hdr_table_entry *e1 = p1;
+ const struct eh_frame_hdr_table_entry *e2 = p2;
+
+ return (e1->start > e2->start) - (e1->start < e2->start);
+}
+
+static void swap_eh_frame_hdr_table_entries(void *p1, void *p2, int size)
+{
+ struct eh_frame_hdr_table_entry *e1 = p1;
+ struct eh_frame_hdr_table_entry *e2 = p2;
+ unsigned long v;
+
+ v = e1->start;
+ e1->start = e2->start;
+ e2->start = v;
+ v = e1->fde;
+ e1->fde = e2->fde;
+ e2->fde = v;
+}
+
+static void __init setup_unwind_table(struct unwind_table *table,
+ void *(*alloc)(unsigned long))
+{
+ const u8 *ptr;
+ unsigned long tableSize = table->size, hdrSize;
+ unsigned n;
+ const u32 *fde;
+ struct {
+ u8 version;
+ u8 eh_frame_ptr_enc;
+ u8 fde_count_enc;
+ u8 table_enc;
+ unsigned long eh_frame_ptr;
+ unsigned int fde_count;
+ struct eh_frame_hdr_table_entry table[];
+ } __attribute__((__packed__)) *header;
+
+ if (table->header)
+ return;
+
+ if (table->hdrsz)
+ printk(KERN_WARNING ".eh_frame_hdr for '%s' present but unusable\n",
+ table->name);
+
+ if (tableSize & (sizeof(*fde) - 1))
+ return;
+
+ for (fde = table->address, n = 0;
+ tableSize > sizeof(*fde) && tableSize - sizeof(*fde) >= *fde;
+ tableSize -= sizeof(*fde) + *fde, fde += 1 + *fde / sizeof(*fde)) {
+ const u32 *cie = cie_for_fde(fde, table);
+ signed ptrType;
+
+ if (cie == ¬_fde)
+ continue;
+ if (cie == NULL
+ || cie == &bad_cie
+ || (ptrType = fde_pointer_type(cie)) < 0)
+ return;
+ ptr = (const u8 *)(fde + 2);
+ if (!read_pointer(&ptr,
+ (const u8 *)(fde + 1) + *fde,
+ ptrType))
+ return;
+ ++n;
+ }
+
+ if (tableSize || !n)
+ return;
+
+ hdrSize = 4 + sizeof(unsigned long) + sizeof(unsigned int)
+ + 2 * n * sizeof(unsigned long);
+ header = alloc(hdrSize);
+ if (!header)
+ return;
+ header->version = 1;
+ header->eh_frame_ptr_enc = DW_EH_PE_abs|DW_EH_PE_native;
+ header->fde_count_enc = DW_EH_PE_abs|DW_EH_PE_data4;
+ header->table_enc = DW_EH_PE_abs|DW_EH_PE_native;
+ put_unaligned((unsigned long)table->address, &header->eh_frame_ptr);
+ BUILD_BUG_ON(offsetof(typeof(*header), fde_count)
+ % __alignof(typeof(header->fde_count)));
+ header->fde_count = n;
+
+ BUILD_BUG_ON(offsetof(typeof(*header), table)
+ % __alignof(typeof(*header->table)));
+ for (fde = table->address, tableSize = table->size, n = 0;
+ tableSize;
+ tableSize -= sizeof(*fde) + *fde, fde += 1 + *fde / sizeof(*fde)) {
+ const u32 *cie = fde + 1 - fde[1] / sizeof(*fde);
+
+ if (!fde[1])
+ continue; /* this is a CIE */
+ ptr = (const u8 *)(fde + 2);
+ header->table[n].start = read_pointer(&ptr,
+ (const u8 *)(fde + 1) + *fde,
+ fde_pointer_type(cie));
+ header->table[n].fde = (unsigned long)fde;
+ ++n;
+ }
+ WARN_ON(n != header->fde_count);
+
+ sort(header->table,
+ n,
+ sizeof(*header->table),
+ cmp_eh_frame_hdr_table_entries,
+ swap_eh_frame_hdr_table_entries);
+
+ table->hdrsz = hdrSize;
+ smp_wmb();
+ table->header = (const void *)header;
+}
+
+static void *__init balloc(unsigned long sz)
+{
+ return __alloc_bootmem_nopanic(sz,
+ sizeof(unsigned int),
+ __pa(MAX_DMA_ADDRESS));
+}
+
+void __init unwind_setup(void)
+{
+ setup_unwind_table(&root_table, balloc);
}
#ifdef CONFIG_MODULES
init_unwind_table(table, module->name,
module->module_core, module->core_size,
module->module_init, module->init_size,
- table_start, table_size);
+ table_start, table_size,
+ NULL, 0);
if (last_table)
last_table->link = table;
return value;
}
+static const u32 *cie_for_fde(const u32 *fde, const struct unwind_table *table)
+{
+ const u32 *cie;
+
+ if (!*fde || (*fde & (sizeof(*fde) - 1)))
+ return &bad_cie;
+ if (!fde[1])
+ return ¬_fde; /* this is a CIE */
+ if ((fde[1] & (sizeof(*fde) - 1))
+ || fde[1] > (unsigned long)(fde + 1) - (unsigned long)table->address)
+ return NULL; /* this is not a valid FDE */
+ cie = fde + 1 - fde[1] / sizeof(*fde);
+ if (*cie <= sizeof(*cie) + 4
+ || *cie >= fde[1] - sizeof(*fde)
+ || (*cie & (sizeof(*cie) - 1))
+ || cie[1])
+ return NULL; /* this is not a (valid) CIE */
+ return cie;
+}
+
static unsigned long read_pointer(const u8 **pLoc,
const void *end,
signed ptrType)
unsigned i;
signed ptrType = -1;
uleb128_t retAddrReg = 0;
- struct unwind_table *table;
+ const struct unwind_table *table;
struct unwind_state state;
if (UNW_PC(frame) == 0)
return -EINVAL;
if ((table = find_table(pc)) != NULL
&& !(table->size & (sizeof(*fde) - 1))) {
- unsigned long tableSize = table->size;
-
- for (fde = table->address;
- tableSize > sizeof(*fde) && tableSize - sizeof(*fde) >= *fde;
- tableSize -= sizeof(*fde) + *fde,
- fde += 1 + *fde / sizeof(*fde)) {
- if (!*fde || (*fde & (sizeof(*fde) - 1)))
- break;
- if (!fde[1])
- continue; /* this is a CIE */
- if ((fde[1] & (sizeof(*fde) - 1))
- || fde[1] > (unsigned long)(fde + 1)
- - (unsigned long)table->address)
- continue; /* this is not a valid FDE */
- cie = fde + 1 - fde[1] / sizeof(*fde);
- if (*cie <= sizeof(*cie) + 4
- || *cie >= fde[1] - sizeof(*fde)
- || (*cie & (sizeof(*cie) - 1))
- || cie[1]
- || (ptrType = fde_pointer_type(cie)) < 0) {
- cie = NULL; /* this is not a (valid) CIE */
- continue;
+ const u8 *hdr = table->header;
+ unsigned long tableSize;
+
+ smp_rmb();
+ if (hdr && hdr[0] == 1) {
+ switch(hdr[3] & DW_EH_PE_FORM) {
+ case DW_EH_PE_native: tableSize = sizeof(unsigned long); break;
+ case DW_EH_PE_data2: tableSize = 2; break;
+ case DW_EH_PE_data4: tableSize = 4; break;
+ case DW_EH_PE_data8: tableSize = 8; break;
+ default: tableSize = 0; break;
+ }
+ ptr = hdr + 4;
+ end = hdr + table->hdrsz;
+ if (tableSize
+ && read_pointer(&ptr, end, hdr[1])
+ == (unsigned long)table->address
+ && (i = read_pointer(&ptr, end, hdr[2])) > 0
+ && i == (end - ptr) / (2 * tableSize)
+ && !((end - ptr) % (2 * tableSize))) {
+ do {
+ const u8 *cur = ptr + (i / 2) * (2 * tableSize);
+
+ startLoc = read_pointer(&cur,
+ cur + tableSize,
+ hdr[3]);
+ if (pc < startLoc)
+ i /= 2;
+ else {
+ ptr = cur - tableSize;
+ i = (i + 1) / 2;
+ }
+ } while (startLoc && i > 1);
+ if (i == 1
+ && (startLoc = read_pointer(&ptr,
+ ptr + tableSize,
+ hdr[3])) != 0
+ && pc >= startLoc)
+ fde = (void *)read_pointer(&ptr,
+ ptr + tableSize,
+ hdr[3]);
}
+ }
+
+ if (fde != NULL) {
+ cie = cie_for_fde(fde, table);
ptr = (const u8 *)(fde + 2);
- startLoc = read_pointer(&ptr,
- (const u8 *)(fde + 1) + *fde,
- ptrType);
- endLoc = startLoc
- + read_pointer(&ptr,
- (const u8 *)(fde + 1) + *fde,
- ptrType & DW_EH_PE_indirect
- ? ptrType
- : ptrType & (DW_EH_PE_FORM|DW_EH_PE_signed));
- if (pc >= startLoc && pc < endLoc)
- break;
- cie = NULL;
+ if(cie != NULL
+ && cie != &bad_cie
+ && cie != ¬_fde
+ && (ptrType = fde_pointer_type(cie)) >= 0
+ && read_pointer(&ptr,
+ (const u8 *)(fde + 1) + *fde,
+ ptrType) == startLoc) {
+ if (!(ptrType & DW_EH_PE_indirect))
+ ptrType &= DW_EH_PE_FORM|DW_EH_PE_signed;
+ endLoc = startLoc
+ + read_pointer(&ptr,
+ (const u8 *)(fde + 1) + *fde,
+ ptrType);
+ if(pc >= endLoc)
+ fde = NULL;
+ } else
+ fde = NULL;
+ }
+ if (fde == NULL) {
+ for (fde = table->address, tableSize = table->size;
+ cie = NULL, tableSize > sizeof(*fde)
+ && tableSize - sizeof(*fde) >= *fde;
+ tableSize -= sizeof(*fde) + *fde,
+ fde += 1 + *fde / sizeof(*fde)) {
+ cie = cie_for_fde(fde, table);
+ if (cie == &bad_cie) {
+ cie = NULL;
+ break;
+ }
+ if (cie == NULL
+ || cie == ¬_fde
+ || (ptrType = fde_pointer_type(cie)) < 0)
+ continue;
+ ptr = (const u8 *)(fde + 2);
+ startLoc = read_pointer(&ptr,
+ (const u8 *)(fde + 1) + *fde,
+ ptrType);
+ if (!startLoc)
+ continue;
+ if (!(ptrType & DW_EH_PE_indirect))
+ ptrType &= DW_EH_PE_FORM|DW_EH_PE_signed;
+ endLoc = startLoc
+ + read_pointer(&ptr,
+ (const u8 *)(fde + 1) + *fde,
+ ptrType);
+ if (pc >= startLoc && pc < endLoc)
+ break;
+ }
}
}
if (cie != NULL) {
projects / powerpc.git / commitdiff