RepoMirrors
/
crash
mirror of https://github.com/crash-utility/crash
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ppc64: Add gdb stack unwind support 

Currently, gdb passthroughs of 'bt', 'frame', 'up', 'down', 'info
locals' don't work. This is due to gdb not knowing the register values to
unwind the stack frames

Every gdb passthrough goes through `gdb_interface`. And then, gdb expects
`crash_target::fetch_registers` to give it the register values, which is
dependent on `machdep->get_current_task_reg` to read the register values for
specific architecture.

                                      ----------------------------
           gdb passthrough (eg. "bt") |                          |
   crash   -------------------------> |                          |
                                      |      gdb_interface       |
                                      |                          |
                                      |                          |
                                      |  ----------------------  |
                 fetch_registers      |  |                    |  |
crash_target<-------------------------+--|        gdb         |  |
            --------------------------+->|                    |  |
              Registers (SP,NIP, etc.)|  |                    |  |
                                      |  |                    |  |
                                      |  ----------------------  |
                                      ----------------------------

Implement `machdep->get_current_task_reg` on PPC64, so that crash provides the
register values to gdb to unwind stack frames properly

With these changes, on powerpc, 'bt' command output in gdb mode, will look
like this:

    gdb> bt
    #0  0xc0000000002a53e8 in crash_setup_regs (oldregs=<optimized out>, newregs=0xc00000000486f8d8) at ./arch/powerpc/include/asm/kexec.h:69
    #1  __crash_kexec (regs=<optimized out>) at kernel/kexec_core.c:974
    #2  0xc000000000168918 in panic (fmt=<optimized out>) at kernel/panic.c:358
    #3  0xc000000000b735f8 in sysrq_handle_crash (key=<optimized out>) at drivers/tty/sysrq.c:155
    #4  0xc000000000b742cc in __handle_sysrq (key=key@entry=99, check_mask=check_mask@entry=false) at drivers/tty/sysrq.c:602
    #5  0xc000000000b7506c in write_sysrq_trigger (file=<optimized out>, buf=<optimized out>, count=2, ppos=<optimized out>) at drivers/tty/sysrq.c:1163
    #6  0xc00000000069a7bc in pde_write (ppos=<optimized out>, count=<optimized out>, buf=<optimized out>, file=<optimized out>, pde=0xc000000009ed3a80) at fs/proc/inode.c:340
    #7  proc_reg_write (file=<optimized out>, buf=<optimized out>, count=<optimized out>, ppos=<optimized out>) at fs/proc/inode.c:352
    #8  0xc0000000005b3bbc in vfs_write (file=file@entry=0xc00000009dda7d00, buf=buf@entry=0xebcfc7c6040 <error: Cannot access memory at address 0xebcfc7c6040>, count=count@entry=2, pos=pos@entry=0xc00000000486fda0) at fs/read_write.c:582

instead of earlier output without this patch:

    gdb> bt
    #0  <unavailable> in ?? ()
    Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Also, 'get_dumpfile_regs' has been introduced to get registers from
multiple supported vmcore formats. Correspondingly a flag 'BT_NO_PRINT_REGS'
has been introduced to tell helper functions to get registers, to not
print registers with every call to backtrace in gdb.

Note: This feature to support GDB unwinding doesn't support live debugging

[lijiang: squash these five patches(see the Link) into one patch]

Link: https://www.mail-archive.com/devel@lists.crash-utility.osci.io/msg01084.html
Link: https://www.mail-archive.com/devel@lists.crash-utility.osci.io/msg01083.html
Link: https://www.mail-archive.com/devel@lists.crash-utility.osci.io/msg01089.html
Link: https://www.mail-archive.com/devel@lists.crash-utility.osci.io/msg01090.html
Link: https://www.mail-archive.com/devel@lists.crash-utility.osci.io/msg01091.html
Co-developed-by:: Tao Liu <ltao@redhat.com>
Signed-off-by: Aditya Gupta <adityag@linux.ibm.com>
This commit is contained in:
Aditya Gupta 2024-09-04 19:49:37 +12:00 committed by Lianbo Jiang
parent 1fd80c623c
commit 6dfda0d223
6 changed files with 437 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

131
defs.h
View File

@ -982,6 +982,7 @@ struct bt_info {
ulong eframe_ip;
ulong radix;
ulong *cpumask;
bool need_free;
};
#define STACK_OFFSET_TYPE(OFF) \
@ -6162,6 +6163,7 @@ int load_module_symbols_helper(char *);
void unlink_module(struct load_module *);
int check_specified_module_tree(char *, char *);
int is_system_call(char *, ulong);
void get_dumpfile_regs(struct bt_info*, ulong*, ulong*);
void generic_dump_irq(int);
void generic_get_irq_affinity(int);
void generic_show_interrupts(int, ulong *);
@ -6261,6 +6263,7 @@ ulong cpu_map_addr(const char *type);
#define BT_REGS_NOT_FOUND (0x4000000000000ULL)
#define BT_OVERFLOW_STACK (0x8000000000000ULL)
#define BT_SKIP_IDLE (0x10000000000000ULL)
#define BT_NO_PRINT_REGS (0x20000000000000ULL)
#define BT_SYMBOL_OFFSET (BT_SYMBOLIC_ARGS)
#define BT_REF_HEXVAL (0x1)
@ -7966,6 +7969,7 @@ extern unsigned char *gdb_prettyprint_arrays;
extern unsigned int *gdb_repeat_count_threshold;
extern unsigned char *gdb_stop_print_at_null;
extern unsigned int *gdb_output_radix;
int is_kvaddr(ulong);
/*
* gdb/top.c
@ -8066,6 +8070,13 @@ extern int have_full_symbols(void);
#define XEN_HYPERVISOR_ARCH
#endif
#ifndef offsetof
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
#define REG_SEQ(TYPE, MEMBER) \
(offsetof(struct TYPE, MEMBER) / FIELD_SIZEOF(struct TYPE, MEMBER))
/*
* Register numbers must be in sync with gdb/features/i386/64bit-core.c
* to make crash_target->fetch_registers() ---> machdep->get_cpu_reg()
@ -8115,6 +8126,126 @@ enum x86_64_regnum {
LAST_REGNUM
};
/*
* Register numbers to make crash_target->fetch_registers()
* ---> machdep->get_current_task_reg() work properly.
*
* These register numbers and names are given according to output of
* `rs6000_register_name`, because that is what was being used by
* crash_target::fetch_registers in case of PPC64
*/
enum ppc64_regnum {
PPC64_R0_REGNUM = 0,
PPC64_R1_REGNUM,
PPC64_R2_REGNUM,
PPC64_R3_REGNUM,
PPC64_R4_REGNUM,
PPC64_R5_REGNUM,
PPC64_R6_REGNUM,
PPC64_R7_REGNUM,
PPC64_R8_REGNUM,
PPC64_R9_REGNUM,
PPC64_R10_REGNUM,
PPC64_R11_REGNUM,
PPC64_R12_REGNUM,
PPC64_R13_REGNUM,
PPC64_R14_REGNUM,
PPC64_R15_REGNUM,
PPC64_R16_REGNUM,
PPC64_R17_REGNUM,
PPC64_R18_REGNUM,
PPC64_R19_REGNUM,
PPC64_R20_REGNUM,
PPC64_R21_REGNUM,
PPC64_R22_REGNUM,
PPC64_R23_REGNUM,
PPC64_R24_REGNUM,
PPC64_R25_REGNUM,
PPC64_R26_REGNUM,
PPC64_R27_REGNUM,
PPC64_R28_REGNUM,
PPC64_R29_REGNUM,
PPC64_R30_REGNUM,
PPC64_R31_REGNUM,
PPC64_F0_REGNUM = 32,
PPC64_F1_REGNUM,
PPC64_F2_REGNUM,
PPC64_F3_REGNUM,
PPC64_F4_REGNUM,
PPC64_F5_REGNUM,
PPC64_F6_REGNUM,
PPC64_F7_REGNUM,
PPC64_F8_REGNUM,
PPC64_F9_REGNUM,
PPC64_F10_REGNUM,
PPC64_F11_REGNUM,
PPC64_F12_REGNUM,
PPC64_F13_REGNUM,
PPC64_F14_REGNUM,
PPC64_F15_REGNUM,
PPC64_F16_REGNUM,
PPC64_F17_REGNUM,
PPC64_F18_REGNUM,
PPC64_F19_REGNUM,
PPC64_F20_REGNUM,
PPC64_F21_REGNUM,
PPC64_F22_REGNUM,
PPC64_F23_REGNUM,
PPC64_F24_REGNUM,
PPC64_F25_REGNUM,
PPC64_F26_REGNUM,
PPC64_F27_REGNUM,
PPC64_F28_REGNUM,
PPC64_F29_REGNUM,
PPC64_F30_REGNUM,
PPC64_F31_REGNUM,
PPC64_PC_REGNUM = 64,
PPC64_MSR_REGNUM = 65,
PPC64_CR_REGNUM = 66,
PPC64_LR_REGNUM = 67,
PPC64_CTR_REGNUM = 68,
PPC64_XER_REGNUM = 69,
PPC64_FPSCR_REGNUM = 70,
PPC64_VR0_REGNUM = 106,
PPC64_VR1_REGNUM,
PPC64_VR2_REGNUM,
PPC64_VR3_REGNUM,
PPC64_VR4_REGNUM,
PPC64_VR5_REGNUM,
PPC64_VR6_REGNUM,
PPC64_VR7_REGNUM,
PPC64_VR8_REGNUM,
PPC64_VR9_REGNUM,
PPC64_VR10_REGNUM,
PPC64_VR11_REGNUM,
PPC64_VR12_REGNUM,
PPC64_VR13_REGNUM,
PPC64_VR14_REGNUM,
PPC64_VR15_REGNUM,
PPC64_VR16_REGNUM,
PPC64_VR17_REGNUM,
PPC64_VR18_REGNUM,
PPC64_VR19_REGNUM,
PPC64_VR20_REGNUM,
PPC64_VR21_REGNUM,
PPC64_VR22_REGNUM,
PPC64_VR23_REGNUM,
PPC64_VR24_REGNUM,
PPC64_VR25_REGNUM,
PPC64_VR26_REGNUM,
PPC64_VR27_REGNUM,
PPC64_VR28_REGNUM,
PPC64_VR29_REGNUM,
PPC64_VR30_REGNUM,
PPC64_VR31_REGNUM,
PPC64_VSCR_REGNUM = 138,
PPC64_VRSAVE_REGNU = 139
};
/* crash_target.c */
extern int gdb_change_thread_context (void);

100
gdb-10.2.patch
View File

@ -16,7 +16,9 @@ tar xvzmf gdb-10.2.tar.gz \
gdb-10.2/gdb/dwarf2/read.c \
gdb-10.2/gdb/ada-lang.c \
gdb-10.2/gdb/objfiles.h \
gdb-10.2/bfd/elf-bfd.h
gdb-10.2/bfd/elf-bfd.h \
gdb-10.2/gdb/stack.c \
gdb-10.2/gdb/ui-file.h
# For newly added gdb files, remove them to be its original state.
@ -16118,3 +16120,99 @@ exit 0
subclass (SYMBOL_NONE)
{
/* We can't use an initializer list for members of a base class, and
--- gdb-10.2/gdb/ui-file.h.orig
+++ gdb-10.2/gdb/ui-file.h
@@ -195,6 +195,7 @@ public:
bool can_emit_style_escape () override;
+ FILE *get_stream(void);
/* Sets the internal stream to FILE, and saves the FILE's file
descriptor in M_FD. */
void set_stream (FILE *file);
--- gdb-10.2/gdb/ui-file.c.orig
+++ gdb-10.2/gdb/ui-file.c
@@ -161,6 +161,12 @@ stdio_file::~stdio_file ()
fclose (m_file);
}
+FILE*
+stdio_file::get_stream(void)
+{
+ return m_file;
+}
+
void
stdio_file::set_stream (FILE *file)
{
--- gdb-10.2/gdb/symtab.c.orig
+++ gdb-10.2/gdb/symtab.c
@@ -6964,8 +6964,12 @@ void
gdb_command_funnel_1(struct gnu_request *req)
{
struct symbol *sym;
+ FILE *original_stdout_stream = nullptr;
+ FILE *original_stderr_stream = nullptr;
if (req->command != GNU_VERSION && req->command != GNU_USER_PRINT_OPTION) {
+ original_stdout_stream = (dynamic_cast< stdio_file * >gdb_stdout)->get_stream();
+ original_stderr_stream = (dynamic_cast< stdio_file * >gdb_stderr)->get_stream();
(dynamic_cast<stdio_file *>gdb_stdout)->set_stream(req->fp);
(dynamic_cast<stdio_file *>gdb_stderr)->set_stream(req->fp);
}
@@ -7068,6 +7072,12 @@ gdb_command_funnel_1(struct gnu_request *req)
req->flags |= GNU_COMMAND_FAILED;
break;
}
+
+ /* Restore the streams gdb output was using */
+ if (original_stdout_stream)
+ (dynamic_cast<stdio_file *>gdb_stdout)->set_stream(original_stdout_stream);
+ if (original_stderr_stream)
+ (dynamic_cast<stdio_file *>gdb_stderr)->set_stream(original_stderr_stream);
}
/*
--- gdb-10.2/gdb/stack.c.orig
+++ gdb-10.2/gdb/stack.c
@@ -1990,6 +1990,11 @@
/* Print briefly all stack frames or just the innermost COUNT_EXP
frames. */
+#ifdef CRASH_MERGE
+extern "C" int is_kvaddr(ulong);
+extern "C" int gdb_CRASHDEBUG(ulong);
+#endif
+
static void
backtrace_command_1 (const frame_print_options &fp_opts,
const backtrace_cmd_options &bt_opts,
@@ -2082,6 +2086,17 @@
hand, perhaps the code does or could be fixed to make sure
the frame->prev field gets set to NULL in that case). */
+#ifdef CRASH_MERGE
+ CORE_ADDR pc = 0;
+ get_frame_pc_if_available (fi, &pc);
+ if (!is_kvaddr(pc)) {
+ if (gdb_CRASHDEBUG(1)) {
+ printf_filtered (_("Backtrace stopped: due to non-kernel addr: 0x%lx\n"),pc);
+ }
+ fi = NULL;
+ break;
+ }
+#endif
print_frame_info (fp_opts, fi, 1, LOCATION, 1, 0);
if ((flags & PRINT_LOCALS) != 0)
{
--- gdb-10.2/gdb/stack.c.orig
+++ gdb-10.2/gdb/stack.c
@@ -2127,7 +2127,7 @@
enum unwind_stop_reason reason;
reason = get_frame_unwind_stop_reason (trailing);
- if (reason >= UNWIND_FIRST_ERROR)
+ if (reason >= UNWIND_FIRST_ERROR && gdb_CRASHDEBUG(1))
printf_filtered (_("Backtrace stopped: %s\n"),
frame_stop_reason_string (trailing));
}

8
gdb_interface.c
View File

@ -711,7 +711,7 @@ static char *prohibited_list[] = {
"watch", "rwatch", "awatch", "attach", "continue", "c", "fg", "detach",
"finish", "handle", "interrupt", "jump", "kill", "next", "nexti",
"signal", "step", "s", "stepi", "target", "until", "delete",
"clear", "disable", "enable", "condition", "ignore", "frame", "catch",
"clear", "disable", "enable", "condition", "ignore", "catch",
"tcatch", "return", "file", "exec-file", "core-file", "symbol-file",
"load", "si", "ni", "shell", "sy",
NULL /* must be last */
@ -947,6 +947,12 @@ gdb_lookup_module_symbol(ulong addr, ulong *offset)
}
}
int
is_kvaddr(ulong addr)
{
return IS_KVADDR(addr);
}
/*
* Used by gdb_interface() to catch gdb-related errors, if desired.
*/

33
kernel.c
View File

@ -3535,6 +3535,39 @@ get_lkcd_regs(struct bt_info *bt, ulong *eip, ulong *esp)
machdep->get_stack_frame(bt, eip, esp);
}
void
get_dumpfile_regs(struct bt_info *bt, ulong *eip, ulong *esp)
{
bt->flags |= BT_NO_PRINT_REGS;
if (NETDUMP_DUMPFILE())
get_netdump_regs(bt, eip, esp);
else if (KDUMP_DUMPFILE())
get_kdump_regs(bt, eip, esp);
else if (DISKDUMP_DUMPFILE())
get_diskdump_regs(bt, eip, esp);
else if (KVMDUMP_DUMPFILE())
get_kvmdump_regs(bt, eip, esp);
else if (LKCD_DUMPFILE())
get_lkcd_regs(bt, eip, esp);
else if (XENDUMP_DUMPFILE())
get_xendump_regs(bt, eip, esp);
else if (SADUMP_DUMPFILE())
get_sadump_regs(bt, eip, esp);
else if (VMSS_DUMPFILE())
get_vmware_vmss_regs(bt, eip, esp);
else if (REMOTE_PAUSED()) {
if (!is_task_active(bt->task) || !get_remote_regs(bt, eip, esp))
machdep->get_stack_frame(bt, eip, esp);
} else
machdep->get_stack_frame(bt, eip, esp);
bt->flags &= ~BT_NO_PRINT_REGS;
bt->instptr = *eip;
bt->stkptr = *esp;
}
/*
* Store the head of the kernel module list for future use.

174
ppc64.c
View File

@ -55,6 +55,8 @@ static void ppc64_set_bt_emergency_stack(enum emergency_stack_type type,
static char * ppc64_check_eframe(struct ppc64_pt_regs *);
static void ppc64_print_eframe(char *, struct ppc64_pt_regs *,
struct bt_info *);
static int ppc64_get_current_task_reg(int regno, const char *name, int size,
void *value);
static void parse_cmdline_args(void);
static int ppc64_paca_percpu_offset_init(int);
static void ppc64_init_cpu_info(void);
@ -73,6 +75,11 @@ static ulong pmd_page_vaddr_l4(ulong pmd);
static int is_opal_context(ulong sp, ulong nip);
void opalmsg(void);
struct user_regs_bitmap_struct {
struct ppc64_pt_regs ur;
ulong bitmap[32];
};
static int is_opal_context(ulong sp, ulong nip)
{
uint64_t opal_start, opal_end;
@ -704,6 +711,8 @@ ppc64_init(int when)
error(FATAL, "cannot malloc hwirqstack buffer space.");
}
machdep->get_current_task_reg = ppc64_get_current_task_reg;
ppc64_init_paca_info();
if (!machdep->hz) {
@ -2501,6 +2510,145 @@ ppc64_print_eframe(char *efrm_str, struct ppc64_pt_regs *regs,
ppc64_print_nip_lr(regs, 1);
}
static int
ppc64_get_current_task_reg(int regno, const char *name, int size,
void *value)
{
struct bt_info bt_info, bt_setup;
struct task_context *tc;
struct user_regs_bitmap_struct *ur_bitmap;
ulong ip, sp;
bool ret = FALSE;
/* Currently only handling registers available in ppc64_pt_regs:
*
* 0-31: r0-r31
* 64: pc/nip
* 65: msr
*
* 67: lr
* 68: ctr
*/
switch (regno) {
case PPC64_R0_REGNUM ... PPC64_R31_REGNUM:
case PPC64_PC_REGNUM:
case PPC64_MSR_REGNUM:
case PPC64_LR_REGNUM:
case PPC64_CTR_REGNUM:
break;
default:
// return false if we can't get that register
if (CRASHDEBUG(1))
error(WARNING, "unsupported register, regno=%d\n", regno);
return FALSE;
}
tc = CURRENT_CONTEXT();
if (!tc)
return FALSE;
BZERO(&bt_setup, sizeof(struct bt_info));
clone_bt_info(&bt_setup, &bt_info, tc);
fill_stackbuf(&bt_info);
// reusing the get_dumpfile_regs function to get pt regs structure
get_dumpfile_regs(&bt_info, &sp, &ip);
if (bt_info.stackbuf)
FREEBUF(bt_info.stackbuf);
ur_bitmap = (struct user_regs_bitmap_struct *)bt_info.machdep;
if (!ur_bitmap) {
error(WARNING, "pt_regs not available for cpu %d\n", tc->processor);
return FALSE;
}
if (!bt_info.need_free) {
goto get_all;
}
switch (regno) {
case PPC64_R0_REGNUM ... PPC64_R31_REGNUM:
if (!NUM_IN_BITMAP(ur_bitmap->bitmap,
REG_SEQ(ppc64_pt_regs, gpr[0]) + regno - PPC64_R0_REGNUM)) {
FREEBUF(ur_bitmap);
return FALSE;
}
break;
case PPC64_PC_REGNUM:
if (!NUM_IN_BITMAP(ur_bitmap->bitmap,
REG_SEQ(ppc64_pt_regs, nip))) {
FREEBUF(ur_bitmap);
return FALSE;
}
break;
case PPC64_MSR_REGNUM:
if (!NUM_IN_BITMAP(ur_bitmap->bitmap,
REG_SEQ(ppc64_pt_regs, msr))) {
FREEBUF(ur_bitmap);
return FALSE;
}
break;
case PPC64_LR_REGNUM:
if (!NUM_IN_BITMAP(ur_bitmap->bitmap,
REG_SEQ(ppc64_pt_regs, link))) {
FREEBUF(ur_bitmap);
return FALSE;
}
break;
case PPC64_CTR_REGNUM:
if (!NUM_IN_BITMAP(ur_bitmap->bitmap,
REG_SEQ(ppc64_pt_regs, ctr))) {
FREEBUF(ur_bitmap);
return FALSE;
}
break;
}
get_all:
switch (regno) {
case PPC64_R0_REGNUM ... PPC64_R31_REGNUM:
if (size != sizeof(ur_bitmap->ur.gpr[regno]))
break;
memcpy(value, &ur_bitmap->ur.gpr[regno], size);
ret = TRUE;
break;
case PPC64_PC_REGNUM:
if (size != sizeof(ur_bitmap->ur.nip))
break;
memcpy(value, &ur_bitmap->ur.nip, size);
ret = TRUE;
break;
case PPC64_MSR_REGNUM:
if (size != sizeof(ur_bitmap->ur.msr))
break;
memcpy(value, &ur_bitmap->ur.msr, size);
ret = TRUE;
break;
case PPC64_LR_REGNUM:
if (size != sizeof(ur_bitmap->ur.link))
break;
memcpy(value, &ur_bitmap->ur.link, size);
ret = TRUE;
break;
case PPC64_CTR_REGNUM:
if (size != sizeof(ur_bitmap->ur.ctr))
break;
memcpy(value, &ur_bitmap->ur.ctr, size);
ret = TRUE;
break;
}
if (bt_info.need_free) {
FREEBUF(ur_bitmap);
bt_info.need_free = FALSE;
}
return ret;
}
/*
* For vmcore typically saved with KDump or FADump, get SP and IP values
* from the saved ptregs.
@ -2613,9 +2761,11 @@ ppc64_get_dumpfile_stack_frame(struct bt_info *bt_in, ulong *nip, ulong *ksp)
pt_regs = (struct ppc64_pt_regs *)bt->machdep;
ur_nip = pt_regs->nip;
ur_ksp = pt_regs->gpr[1];
/* Print the collected regs for panic task. */
ppc64_print_regs(pt_regs);
ppc64_print_nip_lr(pt_regs, 1);
if (!(bt->flags & BT_NO_PRINT_REGS)) {
/* Print the collected regs for panic task. */
ppc64_print_regs(pt_regs);
ppc64_print_nip_lr(pt_regs, 1);
}
} else if ((pc->flags & KDUMP) ||
((pc->flags & DISKDUMP) &&
(*diskdump_flags & KDUMP_CMPRS_LOCAL))) {
@ -2779,19 +2929,29 @@ static void
ppc64_get_stack_frame(struct bt_info *bt, ulong *pcp, ulong *spp)
{
ulong ksp, nip;
struct user_regs_bitmap_struct *ur_bitmap;
nip = ksp = 0;
if (DUMPFILE() && is_task_active(bt->task))
if (DUMPFILE() && is_task_active(bt->task)) {
ppc64_get_dumpfile_stack_frame(bt, &nip, &ksp);
else
bt->need_free = FALSE;
} else {
get_ppc64_frame(bt, &nip, &ksp);
ur_bitmap = (struct user_regs_bitmap_struct *)GETBUF(sizeof(*ur_bitmap));
memset(ur_bitmap, 0, sizeof(*ur_bitmap));
ur_bitmap->ur.nip = nip;
ur_bitmap->ur.gpr[1] = ksp;
SET_BIT(ur_bitmap->bitmap, REG_SEQ(ppc64_pt_regs, nip));
SET_BIT(ur_bitmap->bitmap, REG_SEQ(ppc64_pt_regs, gpr[0]) + 1);
bt->machdep = ur_bitmap;
bt->need_free = TRUE;
}
if (pcp)
*pcp = nip;
if (spp)
*spp = ksp;
}
static ulong

4
unwind_x86_64.h
View File

@ -58,13 +58,9 @@ extern int unwind(struct unwind_frame_info *, int);
extern void init_unwind_table(void);
extern void free_unwind_table(void);
#ifndef offsetof
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
#define get_unaligned(ptr) (*(ptr))
//#define __get_user(x,ptr) __get_user_nocheck((x),(ptr),sizeof(*(ptr)))
#define THREAD_ORDER 1