[Crash-utility] [PATCH] Use registers from LKCD header to get starting ESP register
Bernhard Walle
bwalle at suse.de
Tue May 1 22:23:08 UTC 2007
On i386/x86_64, crash uses the ESP register to start its backtrace when
analysing LKCD dumps. It does this by guessing in get_lkcd_regs(). This patch
uses another approach vor v8 dumps: It uses the registers saved by LKCD in the
arch-specific dump header.
It fixed a problem here where I head a crash dump from a customer
using LKCD that showed a totally wrong backtrace in crash but lcrash
worked fine.
To implement this, the patch fetches the headers for all architectures and not
only to IA64. We need the arch-specific header, this is done by copying the
declaraction from the kernel patch (2.6.17, the latest) and using a separate
header file for each architecture.
Signed-off-by: Bernhard Walle <bwalle at suse.de>
---
Makefile | 31 +++++++++-
defs.h | 2
kernel.c | 63 +++++++++++---------
lkcd_dump_i386.c | 32 ++++++++++
lkcd_dump_i386.h | 71 +++++++++++++++++++++++
lkcd_dump_ia64.c | 35 +++++++++++
lkcd_dump_ia64.h | 81 ++++++++++++++++++++++++++
lkcd_dump_ppc.h | 67 +++++++++++++++++++++
lkcd_dump_v7.h | 163 ++---------------------------------------------------
lkcd_dump_v8.h | 32 ++++++++++
lkcd_dump_x86_64.c | 32 ++++++++++
lkcd_dump_x86_64.h | 71 +++++++++++++++++++++++
lkcd_fix_mem.c | 18 -----
lkcd_v8.c | 140 ++++++++++++++++++++++++++++++++++++++++++++-
14 files changed, 633 insertions(+), 205 deletions(-)
--- a/Makefile
+++ b/Makefile
@@ -97,6 +97,24 @@ OBJECT_FILES=main.o tools.o global_data.
xen_hyper.o xen_hyper_command.o xen_hyper_global_data.o \
xen_hyper_dump_tables.o
+
+# architecture specific LKCD files
+
+ifeq ($(ARCH), x86_64)
+CFILES += lkcd_dump_x86_64.c
+OBJECT_FILES += lkcd_dump_x86_64.o
+endif
+
+ifeq ($(ARCH), i386)
+CFILES += lkcd_dump_i386.c
+OBJECT_FILES += lkcd_dump_i386.o
+endif
+
+ifeq ($(ARCH), ia64)
+CFILES += lkcd_dump_ia64.c
+OBJECT_FILES += lkcd_dump_ia64.o
+endif
+
# These are the current set of crash extensions sources. They are not built
# by default unless the third command line of the "all:" stanza is uncommented.
# Alternatively, they can be built by entering "make extensions" from this
@@ -334,6 +352,15 @@ lkcd_v7.o: ${GENERIC_HFILES} ${LKCD_DUMP
lkcd_v8.o: ${GENERIC_HFILES} ${LKCD_DUMP_HFILES} lkcd_v8.c
cc -c ${CFLAGS} -DMCLX lkcd_v8.c ${WARNING_OPTIONS} ${WARNING_ERROR}
+lkcd_dump_x86_64.o: ${GENERIC_HFILES} ${LKCD_DUMP_HFILES} lkcd_dump_x86_64.c
+ cc -c ${CFLAGS} -DMCLX lkcd_dump_x86_64.c ${WARNING_OPTIONS} ${WARNING_ERROR}
+
+lkcd_dump_i386.o: ${GENERIC_HFILES} ${LKCD_DUMP_HFILES} lkcd_dump_i386.c
+ cc -c ${CFLAGS} -DMCLX lkcd_dump_i386.c ${WARNING_OPTIONS} ${WARNING_ERROR}
+
+lkcd_dump_ia64.o: ${GENERIC_HFILES} ${LKCD_DUMP_HFILES} lkcd_dump_ia64.c
+ cc -c ${CFLAGS} -DMCLX lkcd_dump_ia64.c ${WARNING_OPTIONS} ${WARNING_ERROR}
+
net.o: ${GENERIC_HFILES} net.c
cc -c ${CFLAGS} net.c ${WARNING_OPTIONS} ${WARNING_ERROR}
--- a/defs.h
+++ b/defs.h
@@ -3790,7 +3790,7 @@ void ppc_dump_machdep_table(ulong);
*/
ulong get_lkcd_switch_stack(ulong);
-int fix_addr_v8(int);
+int fix_addr_v8();
int fix_addr_v7(int);
/*
--- a/kernel.c
+++ b/kernel.c
@@ -2089,6 +2089,11 @@ get_lkcd_regs(struct bt_info *bt, ulong
return;
}
+ /* try to get it from the header */
+ if (get_lkcd_regs_for_cpu(bt, eip, esp) == 0)
+ return;
+
+ /* if that fails: do guessing */
sysrq_eip = sysrq_esp = 0;
for (i = 0, up = (ulong *)bt->stackbuf; i < LONGS_PER_STACK; i++, up++){
@@ -2098,48 +2103,48 @@ get_lkcd_regs(struct bt_info *bt, ulong
*esp = *(up-1);
return;
}
- /* Begin 3PAR change -- required for our panic path */
+ /* Begin 3PAR change -- required for our panic path */
if (STREQ(sym, "dump_ipi") && INSTACK(*(up-1), bt)) {
*eip = *up;
*esp = *(up-1);
return;
}
/* End 3PAR change */
- if (STREQ(sym, "panic") && INSTACK(*(up-1), bt)) {
- *eip = *up;
- *esp = *(up-1);
- return;
- }
+ if (STREQ(sym, "panic") && INSTACK(*(up-1), bt)) {
+ *eip = *up;
+ *esp = *(up-1);
+ return;
+ }
/* Egenera */
- if (STREQ(sym, "netdump_ipi")) {
- *eip = *up;
- *esp = bt->task +
+ if (STREQ(sym, "netdump_ipi")) {
+ *eip = *up;
+ *esp = bt->task +
((char *)(up-1) - bt->stackbuf);
- return;
- }
- if (STREQ(sym, "smp_stop_cpu_interrupt")) {
- *eip = *up;
- *esp = bt->task +
+ return;
+ }
+ if (STREQ(sym, "smp_stop_cpu_interrupt")) {
+ *eip = *up;
+ *esp = bt->task +
((char *)(up-1) - bt->stackbuf);
- return;
- }
- if (STREQ(sym, "stop_this_cpu")) {
- *eip = *up;
- *esp = bt->task +
+ return;
+ }
+ if (STREQ(sym, "stop_this_cpu")) {
+ *eip = *up;
+ *esp = bt->task +
((char *)(up-1) - bt->stackbuf);
- return;
- }
- if (SYSRQ_TASK(bt->task) &&
- STREQ(sym, "smp_call_function_interrupt")) {
- sysrq_eip = *up;
- sysrq_esp = bt->task +
- ((char *)(up-1) - bt->stackbuf);
- }
+ return;
+ }
+ if (SYSRQ_TASK(bt->task) &&
+ STREQ(sym, "smp_call_function_interrupt")) {
+ sysrq_eip = *up;
+ sysrq_esp = bt->task +
+ ((char *)(up-1) - bt->stackbuf);
+ }
}
if (sysrq_eip) {
- *eip = sysrq_eip;
- *esp = sysrq_esp;
+ *eip = sysrq_eip;
+ *esp = sysrq_esp;
return;
}
--- /dev/null
+++ b/lkcd_dump_i386.c
@@ -0,0 +1,32 @@
+/* lkcd_dump_i386.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <stdint.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#define LKCD_COMMON
+#include "defs.h"
+#include "lkcd_dump_v8.h"
+
+
+int
+get_lkcd_regs_for_cpu_arch_i386(dump_header_asm_t *dha, int cpu, ulong *eip, ulong *esp)
+{
+ if (eip)
+ *eip = dha->dha_smp_regs[cpu].eip;
+ if (esp)
+ *esp = dha->dha_smp_regs[cpu].esp;
+
+ return 0;
+}
+
--- /dev/null
+++ b/lkcd_dump_i386.h
@@ -0,0 +1,71 @@
+/* lkcd_dump_i386.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#ifndef LKCD_DUMP_I386_H
+#define LKCD_DUMP_I386_H
+
+#include <linux/ptrace.h>
+
+/* from kernel include/asm-i386/dump.h */
+#define DUMP_ASM_MAGIC_NUMBER 0xdeaddeadULL /* magic number */
+#define DUMP_ASM_VERSION_NUMBER 0x5 /* version number */
+
+/*
+ * Structure: __dump_header_asm
+ * Function: This is the header for architecture-specific stuff. It
+ * follows right after the dump header.
+ */
+typedef struct __dump_header_asm_i386 {
+ /* the dump magic number -- unique to verify dump is valid */
+ uint64_t dha_magic_number;
+
+ /* the version number of this dump */
+ uint32_t dha_version;
+
+ /* the size of this header (in case we can't read it) */
+ uint32_t dha_header_size;
+
+ /* the esp for i386 systems */
+ uint32_t dha_esp;
+
+ /* the eip for i386 systems */
+ uint32_t dha_eip;
+
+ /* the dump registers */
+ struct pt_regs dha_regs;
+
+ /* smp specific */
+ uint32_t dha_smp_num_cpus;
+ uint32_t dha_dumping_cpu;
+ struct pt_regs dha_smp_regs[NR_CPUS];
+ uint32_t dha_smp_current_task[NR_CPUS];
+ uint32_t dha_stack[NR_CPUS];
+ uint32_t dha_stack_ptr[NR_CPUS];
+} __attribute__((packed)) dump_header_asm_i386_t;
+
+/*
+ * CPU specific part of dump_header_asm_t
+ */
+typedef struct dump_CPU_info_i386 {
+ struct pt_regs dha_smp_regs;
+ uint64_t dha_smp_current_task;
+ uint64_t dha_stack;
+ uint64_t dha_stack_ptr;
+} __attribute__ ((packed)) dump_CPU_info_i386_t;
+
+
+typedef struct __dump_header_asm_i386 dump_header_asm_t;
+typedef struct dump_CPU_info_i386 dump_CPU_info_t;
+
+
+#endif /* LKCD_DUMP_I386_H */
+
--- /dev/null
+++ b/lkcd_dump_ia64.c
@@ -0,0 +1,35 @@
+/* lkcd_dump_x86_64.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <stdint.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#define LKCD_COMMON
+#include "defs.h"
+#include "lkcd_dump_v8.h"
+#include "lkcd_dump_ia64.h"
+
+
+/* reads the load address value for IA64 */
+
+int lkcd_dump_init_v8_ia64(int fd, dump_header_asm_t *dha)
+{
+ int ret;
+
+ ret = read(fd, &dha->dha_kernel_addr, sizeof(dha->dha_kernel_addr));
+ if (ret != sizeof(dha->dha_kernel_addr))
+ return -1;
+ else
+ return 0;
+}
+
--- /dev/null
+++ b/lkcd_dump_ia64.h
@@ -0,0 +1,81 @@
+/* lkcd_dump_ia64.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#ifndef LKCD_DUMP_IA64_H
+#define LKCD_DUMP_IA64_H
+
+#define _ASM_IA64_FPU_H
+#include <linux/ptrace.h>
+
+#define DUMP_ASM_MAGIC_NUMBER 0xdeaddeadULL /* magic number */
+#define DUMP_ASM_VERSION_NUMBER 0x5 /* version number */
+
+/*
+ * Structure: dump_header_asm_t
+ * Function: This is the header for architecture-specific stuff. It
+ * follows right after the dump header.
+ */
+/*typedef struct _dump_header_asm {*/
+
+typedef struct __dump_header_asm_ia64 {
+
+ /* the dump magic number -- unique to verify dump is valid */
+ uint64_t dha_magic_number;
+
+ /* the version number of this dump */
+ uint32_t dha_version;
+
+ /* the size of this header (in case we can't read it) */
+ uint32_t dha_header_size;
+
+ /* pointer to pt_regs, (OLD: (struct pt_regs *, NEW: (uint64_t)) */
+ uint64_t dha_pt_regs;
+
+ /* the dump registers */
+ struct pt_regs dha_regs;
+
+ /* the rnat register saved after flushrs */
+ uint64_t dha_rnat;
+
+ /* the pfs register saved after flushrs */
+ uint64_t dha_pfs;
+
+ /* the bspstore register saved after flushrs */
+ uint64_t dha_bspstore;
+
+ /* smp specific */
+ uint32_t dha_smp_num_cpus;
+ uint32_t dha_dumping_cpu;
+ struct pt_regs dha_smp_regs[NR_CPUS];
+ uint64_t dha_smp_current_task[NR_CPUS];
+ uint64_t dha_stack[NR_CPUS];
+ uint64_t dha_stack_ptr[NR_CPUS];
+
+ /* load address of kernel */
+ uint64_t dha_kernel_addr;
+
+} __attribute__((packed)) dump_header_asm_ia64_t;
+
+
+struct dump_CPU_info_ia64 {
+ struct pt_regs dha_smp_regs;
+ uint64_t dha_smp_current_task;
+ uint64_t dha_stack;
+ uint64_t dha_stack_ptr;
+} __attribute__((packed)) dump_CPU_info_ia64_t;
+
+typedef struct dump_CPU_info_ia64 dump_CPU_info_t;
+typedef struct __dump_header_asm_ia64 dump_header_asm_t;
+
+int lkcd_dump_init_v8_ia64(int fd, dump_header_asm_t *dha);
+
+#endif /* LKCD_DUMP_IA64_H */
--- /dev/null
+++ b/lkcd_dump_ppc.h
@@ -0,0 +1,67 @@
+/* lkcd_dump_ppc.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#ifndef LKCD_DUMP_PPC_H
+#define LKCD_DUMP_PPC_H
+
+#include <linux/ptrace.h>
+
+/* from kernel include/asm-i386/dump.h */
+#define DUMP_ASM_MAGIC_NUMBER 0xdeaddeadULL /* magic number */
+#define DUMP_ASM_VERSION_NUMBER 0x5 /* version number */
+
+/*
+ * Structure: __dump_header_asm
+ * Function: This is the header for architecture-specific stuff. It
+ * follows right after the dump header.
+ */
+struct __dump_header_asm_ppc {
+
+ /* the dump magic number -- unique to verify dump is valid */
+ uint64_t dha_magic_number;
+
+ /* the version number of this dump */
+ uint32_t dha_version;
+
+ /* the size of this header (in case we can't read it) */
+ uint32_t dha_header_size;
+
+ /* the dump registers */
+ struct pt_regs dha_regs;
+
+ /* smp specific */
+ uint32_t dha_smp_num_cpus;
+ int dha_dumping_cpu;
+ struct pt_regs dha_smp_regs[NR_CPUS];
+ uint64_t dha_smp_current_task[NR_CPUS];
+ uint64_t dha_stack[NR_CPUS];
+ uint64_t dha_stack_ptr[NR_CPUS];
+} __attribute__((packed)) dump_header_asm_ppc_t;
+
+
+/*
+ * CPU specific part of dump_header_asm_t
+ */
+typedef struct dump_CPU_info_ppc {
+ struct pt_regs dha_smp_regs;
+ uint64_t dha_smp_current_task;
+ uint64_t dha_stack;
+ uint64_t dha_stack_ptr;
+} __attribute__ ((packed)) dump_CPU_info_ppc_t;
+
+
+typedef struct __dump_header_asm_ppc dump_header_asm_t;
+typedef struct dump_CPU_info_ppc dump_CPU_info_t;
+
+
+#endif /* LKCD_DUMP_PPC_H */
+
--- a/lkcd_dump_v7.h
+++ b/lkcd_dump_v7.h
@@ -228,165 +228,20 @@ typedef struct lkcdinfo_s {
} lkcdinfo_t;
-#ifdef IA64
-
-#define DUMP_ASM_MAGIC_NUMBER 0xdeaddeadULL /* magic number */
-
-struct pt_regs {
- /* The following registers are saved by SAVE_MIN: */
- unsigned long b6; /* scratch */
- unsigned long b7; /* scratch */
-
- unsigned long ar_csd; /* used by cmp8xchg16 (scratch) */
- unsigned long ar_ssd; /* reserved for future use (scratch) */
-
- unsigned long r8; /* scratch (return value register 0) */
- unsigned long r9; /* scratch (return value register 1) */
- unsigned long r10; /* scratch (return value register 2) */
- unsigned long r11; /* scratch (return value register 3) */
-
- unsigned long cr_ipsr; /* interrupted task's psr */
- unsigned long cr_iip; /* interrupted task's instruction pointer */
- unsigned long cr_ifs; /* interrupted task's function state */
-
- unsigned long ar_unat; /* interrupted task's NaT register (preserved) */
- unsigned long ar_pfs; /* prev function state */
- unsigned long ar_rsc; /* RSE configuration */
- /* The following two are valid only if cr_ipsr.cpl > 0: */
- unsigned long ar_rnat; /* RSE NaT */
- unsigned long ar_bspstore; /* RSE bspstore */
-
- unsigned long pr; /* 64 predicate registers (1 bit each) */
- unsigned long b0; /* return pointer (bp) */
- unsigned long loadrs; /* size of dirty partition << 16 */
-
- unsigned long r1; /* the gp pointer */
- unsigned long r12; /* interrupted task's memory stack pointer */
- unsigned long r13; /* thread pointer */
-
- unsigned long ar_fpsr; /* floating point status (preserved) */
- unsigned long r15; /* scratch */
-
- /* The remaining registers are NOT saved for system calls. */
-
- unsigned long r14; /* scratch */
- unsigned long r2; /* scratch */
- unsigned long r3; /* scratch */
-
- /* The following registers are saved by SAVE_REST: */
- unsigned long r16; /* scratch */
- unsigned long r17; /* scratch */
- unsigned long r18; /* scratch */
- unsigned long r19; /* scratch */
- unsigned long r20; /* scratch */
- unsigned long r21; /* scratch */
- unsigned long r22; /* scratch */
- unsigned long r23; /* scratch */
- unsigned long r24; /* scratch */
- unsigned long r25; /* scratch */
- unsigned long r26; /* scratch */
- unsigned long r27; /* scratch */
- unsigned long r28; /* scratch */
- unsigned long r29; /* scratch */
- unsigned long r30; /* scratch */
- unsigned long r31; /* scratch */
-
- unsigned long ar_ccv; /* compare/exchange value (scratch) */
-
- /*
- * Floating point registers that the kernel considers scratch:
- */
- struct ia64_fpreg f6; /* scratch */
- struct ia64_fpreg f7; /* scratch */
- struct ia64_fpreg f8; /* scratch */
- struct ia64_fpreg f9; /* scratch */
- struct ia64_fpreg f10; /* scratch */
- struct ia64_fpreg f11; /* scratch */
-};
-
/*
- * Structure: dump_header_asm_t
- * Function: This is the header for architecture-specific stuff. It
- * follows right after the dump header.
+ * architecture specific data structures
*/
-typedef struct _dump_header_asm_s {
-
- /* the dump magic number -- unique to verify dump is valid */
- uint64_t dha_magic_number;
-
- /* the version number of this dump */
- uint32_t dha_version;
-
- /* the size of this header (in case we can't read it) */
- uint32_t dha_header_size;
-
- /* pointer to pt_regs */
- struct pt_regs *dha_pt_regs;
-
- /* the dump registers */
- struct pt_regs dha_regs;
-
- /* the rnat register saved after flushrs */
- uint64_t dha_rnat;
-
- /* the pfs register saved after flushrs */
- uint64_t dha_pfs;
-
- /* the bspstore register saved after flushrs */
- uint64_t dha_bspstore;
-
- /* smp specific */
- uint32_t dha_smp_num_cpus;
- int dha_dumping_cpu;
- struct pt_regs dha_smp_regs[NR_CPUS];
- void * dha_smp_current_task[NR_CPUS];
- void * dha_stack[NR_CPUS];
- void * dha_switch_stack[NR_CPUS];
-
-} dump_header_asm_t;
-
-#define NR_CPUS 32
-
-typedef struct _dump_header_asm_smp_s {
-
- /* the dump magic number -- unique to verify dump is valid */
- uint64_t dha_magic_number;
-
- /* the version number of this dump */
- uint32_t dha_version;
-
- /* the size of this header (in case we can't read it) */
- uint32_t dha_header_size;
-
- /* pointer to pt_regs */
- struct pt_regs *dha_pt_regs;
-
- /* the dump registers */
- struct pt_regs dha_regs;
-
- /* the rnat register saved after flushrs */
- uint64_t dha_rnat;
-
- /* the pfs register saved after flushrs */
- uint64_t dha_pfs;
-
- /* the bspstore register saved after flushrs */
- uint64_t dha_bspstore;
-
- /* smp specific */
- uint32_t dha_smp_num_cpus;
- int dha_dumping_cpu;
- struct pt_regs dha_smp_regs[NR_CPUS];
- void * dha_smp_current_task[NR_CPUS];
- void * dha_stack[NR_CPUS];
- void * dha_switch_stack[NR_CPUS];
-
-} dump_header_asm_smp_t;
-
+#if defined(IA64)
+# include "lkcd_dump_ia64.h"
+#elif defined(X86_64)
+# include "lkcd_dump_x86_64.h"
+#elif defined(X86)
+# include "lkcd_dump_i386.h"
+#else
+# error "Add support for your architecture here"
#endif
-
#ifdef __KERNEL__
/*
--- a/lkcd_dump_v8.h
+++ b/lkcd_dump_v8.h
@@ -235,4 +235,36 @@ typedef struct lkcdinfo_s {
int stack_offset;
} lkcdinfo_t;
+
+#if defined(IA64)
+
+# include "lkcd_dump_ia64.h"
+# define get_lkcd_regs_for_cpu_arch(dha, cpu, eip, esp) \
+ -1
+
+#elif defined(X86_64)
+
+# include "lkcd_dump_x86_64.h"
+# define get_lkcd_regs_for_cpu_arch(dha, cpu, eip, esp) \
+ get_lkcd_regs_for_cpu_arch_x86_64(dha, cpu, eip, esp)
+
+#elif defined(X86)
+
+# include "lkcd_dump_i386.h"
+# define get_lkcd_regs_for_cpu_arch(dha, cpu, eip, esp) \
+ get_lkcd_regs_for_cpu_arch_i386(dha, cpu, eip, esp)
+
+#elif defined(PPC) || defined(PPC64)
+
+# include "lkcd_dump_ppc.h"
+# define get_lkcd_regs_for_cpu_arch(dha, cpu, eip, esp) \
+ -1
+
+#else
+
+# define NO_LKCD_DUMP_ARCH 1
+
+#endif
+
+
#endif /* _DUMP_H */
--- /dev/null
+++ b/lkcd_dump_x86_64.c
@@ -0,0 +1,32 @@
+/* lkcd_dump_x86_64.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <stdint.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#define LKCD_COMMON
+#include "defs.h"
+#include "lkcd_dump_v8.h"
+
+
+int
+get_lkcd_regs_for_cpu_arch_x86_64(dump_header_asm_t *dha, int cpu, ulong *eip, ulong *esp)
+{
+ if (eip)
+ *eip = dha->dha_smp_regs[cpu].rip;
+ if (esp)
+ *esp = dha->dha_smp_regs[cpu].rsp;
+
+ return 0;
+}
+
--- /dev/null
+++ b/lkcd_dump_x86_64.h
@@ -0,0 +1,71 @@
+/* lkcd_dump_x86_64.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#ifndef LKCD_DUMP_X86_64_H
+#define LKCD_DUMP_X86_64_H
+
+#include <linux/ptrace.h>
+
+#define DUMP_HEADER_SIZE 0x100000
+
+
+/* from kernel include/asm-x86_64/dump.h */
+
+/* definitions */
+#define DUMP_ASM_MAGIC_NUMBER 0xdeaddeadULL /* magic number */
+#define DUMP_ASM_VERSION_NUMBER 0x2 /* version number */
+
+
+/*
+ * Structure: dump_header_asm_t
+ * Function: This is the header for architecture-specific stuff. It
+ * follows right after the dump header.
+ */
+typedef struct __dump_header_asm_x86_64 {
+
+ /* the dump magic number -- unique to verify dump is valid */
+ uint64_t dha_magic_number;
+
+ /* the version number of this dump */
+ uint32_t dha_version;
+
+ /* the size of this header (in case we can't read it) */
+ uint32_t dha_header_size;
+
+ /* the dump registers */
+ struct pt_regs dha_regs;
+
+ /* smp specific */
+ uint32_t dha_smp_num_cpus;
+ int dha_dumping_cpu;
+ struct pt_regs dha_smp_regs[NR_CPUS];
+ uint64_t dha_smp_current_task[NR_CPUS];
+ uint64_t dha_stack[NR_CPUS];
+ uint64_t dha_stack_ptr[NR_CPUS];
+} __attribute__((packed)) dump_header_asm_t_x86_64;
+
+
+/*
+ * CPU specific part of dump_header_asm_t
+ */
+typedef struct dump_CPU_info_x86_64 {
+ struct pt_regs dha_smp_regs;
+ uint64_t dha_smp_current_task;
+ uint64_t dha_stack;
+ uint64_t dha_stack_ptr;
+} __attribute__ ((packed)) dump_CPU_info_x86_64_t;
+
+typedef struct dump_CPU_info_x86_64 dump_CPU_info_t;
+typedef struct __dump_header_asm_x86_64 dump_header_asm_t;
+
+#endif /* LKCD_DUMP_X86_64_H */
+
--- a/lkcd_fix_mem.c
+++ b/lkcd_fix_mem.c
@@ -25,16 +25,8 @@
static int fix_addr(dump_header_asm_t *);
int
-fix_addr_v8(int fd)
+fix_addr_v8(dump_header_asm_t *dha)
{
- static dump_header_asm_t dump_header_asm_v8 = { 0 };
- dump_header_asm_t *dha;
- dha = &dump_header_asm_v8;
-
- if (read(lkcd->fd, dha, sizeof(dump_header_asm_t)) !=
- sizeof(dump_header_asm_t))
- return -1;
-
fix_addr(dha);
return 0;
@@ -59,14 +51,6 @@ fix_addr_v7(int fd)
static int
fix_addr(dump_header_asm_t *dha)
{
-
-
- if (dha->dha_header_size != sizeof(dump_header_asm_t)) {
- error(INFO, "LKCD machine specific dump header doesn't match crash version\n");
- error(INFO, "traceback of currently executing threads may not work\n\n");
- }
-
-
lkcd->dump_header_asm = dha;
--- a/lkcd_v8.c
+++ b/lkcd_v8.c
@@ -19,15 +19,120 @@
*/
#define LKCD_COMMON
+#include <stddef.h>
#include "defs.h"
#include "lkcd_dump_v8.h" /* REMIND */
static dump_header_t dump_header_v8 = { 0 };
-// static dump_header_asm_t dump_header_asm_v8 = { 0 };
+#ifndef NO_LKCD_DUMP_ARCH
+static dump_header_asm_t dump_header_asm_v8 = { 0 };
+#endif
static dump_page_t dump_page = { 0 };
static void mclx_cache_page_headers_v8(void);
static off_t lkcd_offset_to_first_page = LKCD_OFFSET_TO_FIRST_PAGE;
+#define STR(x) #x
+
+#ifndef NO_LKCD_DUMP_ARCH
+int
+lkcd_dump_init_v8_arch(dump_header_t *dh, dump_header_asm_t *dha)
+{
+ off_t ret_of;
+ ssize_t ret_sz;
+ uint32_t hdr_size, offset, nr_cpus;
+ dump_header_asm_t arch_hdr;
+ char *hdr_buf = NULL;
+
+ ret_of = lseek(lkcd->fd, dh->dh_header_size +
+ offsetof(dump_header_asm_t, dha_header_size),
+ SEEK_SET);
+ if (ret_of < 0) {
+ perror("lseek failed in " __FILE__ ":" STR(__LINE__));
+ goto err;
+ }
+
+ ret_sz = read(lkcd->fd, (char *)&hdr_size, sizeof(hdr_size));
+ if (ret_sz != sizeof(hdr_size)) {
+ perror("Reading hdr_size failed in " __FILE__ ":" STR(__LINE__));
+ goto err;
+ }
+
+ ret_of = lseek(lkcd->fd, dh->dh_header_size, SEEK_SET);
+ if (ret_of < 0) {
+ perror("lseek failed in " __FILE__ ":" STR(__LINE__));
+ goto err;
+ }
+
+ hdr_buf = (char *)malloc(hdr_size);
+ if (!hdr_buf) {
+ perror("Could not allocate memory for dump header\n");
+ goto err;
+ }
+
+ ret_sz = read(lkcd->fd, (char *)hdr_buf, hdr_size);
+ if (ret_sz != hdr_size) {
+ perror("Could not read header " __FILE__ ":" STR(__LINE__));
+ goto err;
+ }
+
+
+ /*
+ * Though we have KL_NR_CPUS is 128, the header size is different
+ * CONFIG_NR_CPUS might be different in the kernel. Hence, need
+ * to find out how many CPUs are configured.
+ */
+ offset = offsetof(dump_header_asm_t, dha_smp_regs[0]);
+ nr_cpus = (hdr_size - offset) / sizeof(dump_CPU_info_t);
+
+ /* check for CPU overflow */
+ if (nr_cpus > NR_CPUS) {
+ fprintf(stderr, "CPU number too high %d (%s:%s)\n",
+ nr_cpus, __FILE__, __LINE__);
+ goto err;
+ }
+
+ /* parts that don't depend on the number of CPUs */
+ memcpy(&arch_hdr, (void *)hdr_buf, offset);
+
+ /* registers */
+ memcpy(&arch_hdr.dha_smp_regs, (void *)&hdr_buf[offset],
+ nr_cpus * sizeof(struct pt_regs));
+ offset += nr_cpus * sizeof(struct pt_regs);
+
+ /* current task */
+ memcpy(&arch_hdr.dha_smp_current_task, (void *)&hdr_buf[offset],
+ nr_cpus * sizeof(&arch_hdr.dha_smp_current_task[0]));
+ offset += nr_cpus * sizeof(&arch_hdr.dha_smp_current_task[0]);
+
+ /* stack */
+ memcpy(&arch_hdr.dha_stack, (void *)&hdr_buf[offset],
+ nr_cpus * sizeof(&arch_hdr.dha_stack[0]));
+ offset += nr_cpus * sizeof(&arch_hdr.dha_stack[0]);
+
+ /* stack_ptr */
+ memcpy(&arch_hdr.dha_stack_ptr, (void *)&hdr_buf[offset],
+ nr_cpus * sizeof(&arch_hdr.dha_stack_ptr[0]));
+ offset += nr_cpus * sizeof(&arch_hdr.dha_stack_ptr[0]);
+
+ if (arch_hdr.dha_magic_number != DUMP_ASM_MAGIC_NUMBER) {
+ fprintf(stderr, "Invalid magic number for x86_64\n");
+ goto err;
+ }
+
+#ifdef IA64
+ lkcd_dump_init_v8_ia64(lkcd->fd, &arch_hdr);
+#endif
+
+ memcpy(dha, &arch_hdr, sizeof(dump_header_asm_t));
+
+ return 0;
+
+err:
+ free(hdr_buf);
+ return -1;
+}
+#endif
+
/*
* Verify and initialize the LKCD environment, storing the common data
* in the global lkcd_environment structure.
@@ -69,8 +174,16 @@ lkcd_dump_init_v8(FILE *fp, int fd, char
lkcd->dump_header = dh;
if (lkcd->debug)
dump_lkcd_environment(LKCD_DUMP_HEADER_ONLY);
+
+#ifndef NO_LKCD_DUMP_ARCH
+ if (lkcd_dump_init_v8_arch(dh, &dump_header_asm_v8) != 0) {
+ fprintf(stderr, "Warning: Failed to initialise "
+ "arch specific dump code\n");
+ }
+#endif
+
#ifdef IA64
- if ( (fix_addr_v8(fd) == -1) )
+ if ( (fix_addr_v8(&dump_header_asm_v8) == -1) )
return FALSE;
#endif
@@ -233,6 +346,29 @@ lkcd_dump_init_v8(FILE *fp, int fd, char
return TRUE;
}
+int
+get_lkcd_regs_for_cpu(struct bt_info *bt, ulong *eip, ulong *esp)
+{
+ int cpu;
+
+ if (!bt || !bt->tc) {
+ fprintf(stderr, "get_lkcd_regs_for_cpu: invalid tc\n", cpu);
+ return -EINVAL;
+ }
+
+ cpu = bt->tc->processor;
+
+ if (cpu >= NR_CPUS) {
+ fprintf(stderr, "get_lkcd_regs_for_cpu, cpu (%d) too high\n", cpu);
+ return -EINVAL;
+ }
+
+#ifndef NO_LKCD_DUMP_ARCH
+ return get_lkcd_regs_for_cpu_arch(&dump_header_asm_v8, cpu, eip, esp);
+#else
+ return -ENOSYS;
+#endif
+}
/*
* Return the current page's dp_size.
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