On 2024/03/01 12:21, tianming.wang@xxxxxxxxxx wrote:
>
> The log was not cut off last time. This is the entire log.
> it seems ".text" exit in the list.
Hmm, it looks no ".text" section to me.. a ".text" section exists like
this in a vmcore on hand:
crash> mod -s xfs
ffffffffc07a3000 .note.gnu.build-id
ffffffffc07a3024 .note.Linux
ffffffffc0578000 .text << this one
ffffffffc067bb44 .static_call.text
ffffffffc054a000 .init.text
...
It looks like each function has its own section in your vmcore. I found
-ffunction-sections option of gcc, do you use this? probably the
current crash does not support this gcc option.
Just an experiment, how does the attached patch work?
Thanks,
Kazu
> crash_latest_fix_k66> mod -d sysdump
> crash_latest_fix_k66> set debug 1
> debug: 1
> crash_latest_fix_k66> mod -s sysdump
> ffffffc07afb8000 __ksymtab
> ffffffc07afb8060 __kcrctab
> ffffffc07afb8080 .altinstructions
> ffffffc07afa8000 __bug_table
> ffffffc07afbc000 __jump_table
> ffffffc07afa8010 .bss
> ffffffc07afa84b8 .data
> ffffffc07afb8248 .rodata
> ffffffc07afa0000 .plt
> ffffffc07afbe000 .init.plt
> ffffffc07afa0a8c .text.ftrace_trampoline
> ffffffc07afc9000 .init.eh_frame
> ffffffc07afba370 .export_symbol
> ffffffc07afa0a98 .text.sysdump_callback_register
> ffffffc07afa0aa8 .text.sysdump_callback_unregiste
> ffffffc07afa0ab8 .text.sprd_debug_check_crash_key
> ffffffc07afa0c04 .text.sprd_vmalloc_or_module_add
> ffffffc07afa0c40 .text.unisoc_virt_to_phys
> ffffffc07afa0d0c .text.minidump_save_extend_infor
> ffffffc07afa1080 .text.minidump_change_extend_inf
> ffffffc07afa11bc .text.crash_note_save_cpu
> ffffffc07afa1494 .text.sysdump_ipi
> ffffffc07afa17cc .text.prepare_minidump_reg_memor
> ffffffc07afa1aec .text.show_minidump_info
> ffffffc07afa21d0 .text.minidump_init
> ffffffc07afa25dc .text.show_exception_info
> ffffffc07afa27dc .text.get_file_line_info
> ffffffc07afa2830 .text.get_exception_stack_info
> ffffffc07afa2af4 .text.prepare_dump_info_for_wdh
> ffffffc07afa2b30 .text.prepare_minidump_info
> ffffffc07afa2bd8 .text.prepare_exception_info
> ffffffc07afa2da0 .text.sysdump_sysctl_exit
> ffffffc07afa2f50 .text.init_module
> ffffffc07afa3f30 .text.rcu_lock_acquire
> ffffffc07afa3f70 .text.rcu_lock_release
> ffffffc07afa3f9c .text.minidump_info_open
> ffffffc07afa3fcc .text.minidump_info_read
> ffffffc07afa4020 .text.ylog_buffer_map
> ffffffc07afa40a8 .text.ylog_buffer_open
> ffffffc07afa40b4 .text.dump_die_cb
> ffffffc07afa4118 .text.sysdump_event
> ffffffc07afa4150 .text.sysdump_connect
> ffffffc07afa420c .text.sysdump_disconnect
> ffffffc07afa4240 .text.sysdump_panic_event
> ffffffc07afa4980 .text.per_cpu_funcs_register
> ffffffc07afa49fc .text.sprd_sysdump_open
> ffffffc07afa4a2c .text.sprd_sysdump_write
> ffffffc07afa4ce8 .text.sprd_sysdump_read
> ffffffc07afb01d0 __dyndbg
> ffffffc07afc0000 .init.data
> ffffffc07afb0ba8 .exit.data
> ffffffc07afa4d24 .text.append_elf_note
> ffffffc07afa4dbc .text.final_note
> ffffffc07afa4dcc .text.update_vmcoreinfo_note
> ffffffc07afa4e24 .text.crash_update_vmcoreinfo_sa
> ffffffc07afa4e70 .text.crash_save_vmcoreinfo
> ffffffc07afa4ef8 .text.vmcoreinfo_append_str
> ffffffc07afa5008 .text.paddr_vmcoreinfo_note
> ffffffc07afa5048 .text.crash_save_vmcoreinfo_init
> ffffffc07afa5594 .text.crash_save_vmcoreinfo_exit
> ffffffc07afa55e0 .text.sysdump_get_kmsg_to_buffer
> ffffffc07afa5680 .text.last_kmsg_init
> ffffffc07afa5b90 .text.last_kmsg_exit
> ffffffc07afa5ca0 .text.kmsg_get_thread
> ffffffc07afa5db0 .text.save_log_to_partition_hand
> ffffffc07afa6040 .text.get_last_kmsg
> ffffffc07afa6120 .text.last_kmsg_handler
> ffffffc07afba3f0 __ksymtab_strings
> ffffffc07afba4c4 .note.Linux
> ffffffc07afb0bc0 .gnu.linkonce.this_module
> ffffffc07afba4f4 .note.gnu.build-id
> ffffffc07afba518 .note.gnu.property
> ffffffc07afc0008 .symtab
> ffffffc07afc4928 .strtab
> /home/tianming.wang/workdir/kernel_6.6/sysdump.ko: add_symbol_file_kallsyms failed
> add-symbol-file /home/tianming.wang/workdir/kernel_6.6/sysdump.ko 0xffffffc07afa0000 -s .data 0xffffffc07afa84b8 -s .bss 0xffffffc07afa8010 -s .rodata 0xffffffc07afb8248
> add symbol table from file "/home/tianming.wang/workdir/kernel_6.6/sysdump.ko" at
> .text_addr = 0xffffffc07afa0000
> .data_addr = 0xffffffc07afa84b8
> .bss_addr = 0xffffffc07afa8010
> .rodata_addr = 0xffffffc07afb8248
> MODULE NAME TEXT_BASE SIZE OBJECT FILE
> ffffffc07afb0bc0 sysdump ffffffc07afa0000 106496 /home/tianming.wang/workdir/kernel_6.6/sysdump.ko
> --
> Crash-utility mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxxxxxx
> To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxxxxxx
> https://${domain_name}/admin/lists/devel.lists.crash-utility.osci.io/
> Contribution Guidelines: https://github.com/crash-utility/crash/wikidiff --git a/defs.h b/defs.h
index 98650e8..9f40045 100644
--- a/defs.h
+++ b/defs.h
@@ -2240,6 +2240,9 @@ struct offset_table { /* stash of commonly-used offsets */
long mnt_namespace_nr_mounts;
long mount_mnt_node;
long log_caller_id;
+ long module_sect_attr_battr;
+ long bin_attribute_attr;
+ long attribute_name;
};
struct size_table { /* stash of commonly-used sizes */
@@ -2911,8 +2914,9 @@ struct symbol_table_data {
#define MODSECT_V1 (0x2000)
#define MODSECT_V2 (0x4000)
#define MODSECT_V3 (0x8000)
-#define MODSECT_VMASK (MODSECT_V1|MODSECT_V2|MODSECT_V3)
#define NO_STRIP (0x10000)
+#define MODSECT_V4 (0x20000)
+#define MODSECT_VMASK (MODSECT_V1|MODSECT_V2|MODSECT_V3|MODSECT_V4)
#define NO_LINE_NUMBERS() ((st->flags & GDB_SYMS_PATCHED) && !(kt->flags2 & KASLR))
diff --git a/symbols.c b/symbols.c
index cbc9ed1..19f7dd0 100644
--- a/symbols.c
+++ b/symbols.c
@@ -3812,6 +3812,8 @@ dump_symbol_table(void)
fprintf(fp, "%sMODSECT_V2", others++ ? "|" : "");
if (st->flags & MODSECT_V3)
fprintf(fp, "%sMODSECT_V3", others++ ? "|" : "");
+ if (st->flags & MODSECT_V4)
+ fprintf(fp, "%sMODSECT_V4", others++ ? "|" : "");
if (st->flags & MODSECT_UNKNOWN)
fprintf(fp, "%sMODSECT_UNKNOWN", others++ ? "|" : "");
if (st->flags & NO_STRIP)
@@ -10233,6 +10235,7 @@ dump_offset_table(char *spec, ulong makestruct)
OFFSET(module_sect_attrs_attrs));
fprintf(fp, " module_sect_attrs_nsections: %ld\n",
OFFSET(module_sect_attrs_nsections));
+ fprintf(fp, " module_sect_attr_battr: %ld\n", OFFSET(module_sect_attr_battr));
fprintf(fp, " module_sect_attr_mattr: %ld\n",
OFFSET(module_sect_attr_mattr));
fprintf(fp, " module_sect_attr_name: %ld\n",
@@ -10241,12 +10244,14 @@ dump_offset_table(char *spec, ulong makestruct)
OFFSET(module_sect_attr_address));
fprintf(fp, " attribute_owner: %ld\n",
OFFSET(attribute_owner));
+ fprintf(fp, " attribute_name: %ld\n", OFFSET(attribute_name));
fprintf(fp, " module_sect_attr_attr: %ld\n",
OFFSET(module_sect_attr_attr));
fprintf(fp, " module_sections_attrs: %ld\n",
OFFSET(module_sections_attrs));
fprintf(fp, " module_attribute_attr: %ld\n",
OFFSET(module_attribute_attr));
+ fprintf(fp, " bin_attribute_attr: %ld\n", OFFSET(bin_attribute_attr));
fprintf(fp, " module_kallsyms_start: %ld\n",
OFFSET(module_kallsyms_start));
@@ -13165,7 +13170,14 @@ add_symbol_file_kallsyms(struct load_module *lm, struct gnu_request *req)
MEMBER_OFFSET_INIT(attribute_owner,
"attribute", "owner");
- if (VALID_MEMBER(module_sect_attrs_attrs) &&
+ /* Linux 5.8 and later */
+ MEMBER_OFFSET_INIT(module_sect_attr_battr, "module_sect_attr", "battr");
+ MEMBER_OFFSET_INIT(bin_attribute_attr, "bin_attribute", "attr");
+ MEMBER_OFFSET_INIT(attribute_name, "attribute", "name");
+
+ if (VALID_MEMBER(module_sect_attr_battr))
+ st->flags |= MODSECT_V4;
+ else if (VALID_MEMBER(module_sect_attrs_attrs) &&
VALID_MEMBER(module_sect_attr_mattr) &&
VALID_MEMBER(module_attribute_attr) &&
VALID_MEMBER(module_sect_attrs_nsections))
@@ -13185,7 +13197,7 @@ add_symbol_file_kallsyms(struct load_module *lm, struct gnu_request *req)
(INVALID_MEMBER(attribute_owner) &&
(st->flags & (MODSECT_V1|MODSECT_V2))) ||
INVALID_MEMBER(module_sect_attrs) ||
- INVALID_MEMBER(module_sect_attr_name) ||
+ (INVALID_MEMBER(module_sect_attr_name) && !(st->flags & MODSECT_V4)) ||
INVALID_MEMBER(module_sect_attr_address)) {
if (CRASHDEBUG(1))
error(WARNING,
@@ -13216,6 +13228,7 @@ add_symbol_file_kallsyms(struct load_module *lm, struct gnu_request *req)
nsections = UNUSED;
break;
case MODSECT_V3:
+ case MODSECT_V4:
array_entry = vaddr + OFFSET(module_sect_attrs_attrs);
if (!readmem(vaddr + OFFSET(module_sect_attrs_nsections),
KVADDR, &nsections, sizeof(int),
@@ -13229,7 +13242,10 @@ add_symbol_file_kallsyms(struct load_module *lm, struct gnu_request *req)
if (CRASHDEBUG(2))
fprintf(fp, "%s:\n", lm->mod_namelist);
- name_type = MEMBER_TYPE("module_sect_attr", "name");
+ name_type = TYPE_CODE_UNDEF;
+ if (!(st->flags & MODSECT_V4))
+ name_type = MEMBER_TYPE("module_sect_attr", "name");
+
req->buf = GETBUF(buflen = 1024);
retval = FALSE;
@@ -13245,6 +13261,10 @@ add_symbol_file_kallsyms(struct load_module *lm, struct gnu_request *req)
attribute = array_entry + OFFSET(module_sect_attr_mattr)
+ OFFSET(module_attribute_attr);
break;
+ case MODSECT_V4:
+ attribute = array_entry + OFFSET(module_sect_attr_battr)
+ + OFFSET(bin_attribute_attr);
+ break;
}
if (st->flags & (MODSECT_V1|MODSECT_V2))
@@ -13253,23 +13273,35 @@ add_symbol_file_kallsyms(struct load_module *lm, struct gnu_request *req)
owner = UNUSED;
address = array_entry + OFFSET(module_sect_attr_address);
- switch (name_type)
- {
- case TYPE_CODE_ARRAY:
- name = array_entry + OFFSET(module_sect_attr_name);
- break;
- case TYPE_CODE_PTR:
- if (!readmem(array_entry + OFFSET(module_sect_attr_name),
- KVADDR, &name, sizeof(void *),
- "module_sect_attr.name", RETURN_ON_ERROR|QUIET)) {
+
+ if (st->flags & MODSECT_V4) {
+ if (!readmem(array_entry + OFFSET(module_sect_attr_battr)
+ + OFFSET(bin_attribute_attr) + OFFSET(attribute_name),
+ KVADDR, &name, sizeof(void *),
+ "module_sect_attr.battr.attr.name", RETURN_ON_ERROR|QUIET)) {
done = TRUE;
retval = FALSE;
continue;
}
- break;
- default:
- done = TRUE;
- retval = FALSE;
+ } else {
+ switch (name_type)
+ {
+ case TYPE_CODE_ARRAY:
+ name = array_entry + OFFSET(module_sect_attr_name);
+ break;
+ case TYPE_CODE_PTR:
+ if (!readmem(array_entry + OFFSET(module_sect_attr_name),
+ KVADDR, &name, sizeof(void *),
+ "module_sect_attr.name", RETURN_ON_ERROR|QUIET)) {
+ done = TRUE;
+ retval = FALSE;
+ continue;
+ }
+ break;
+ default:
+ done = TRUE;
+ retval = FALSE;
+ }
}
if (CRASHDEBUG(2)) {
@@ -13341,12 +13373,24 @@ add_symbol_file_kallsyms(struct load_module *lm, struct gnu_request *req)
}
if (retval == FALSE) {
+ sprintf(buf, "add-symbol-file %s 0x%lx %s",
+ lm->mod_namelist, lm->mod_text_start,
+ pc->curcmd_flags & MOD_READNOW ? "-readnow" : "");
+ len = strlen(req->buf);
+ while ((len + strlen(buf)) >= buflen) {
+ RESIZEBUF(req->buf, buflen, buflen * 2);
+ buflen *= 2;
+ }
+ shift_string_right(req->buf, strlen(buf));
+ BCOPY(buf, req->buf, strlen(buf));
+ /*
if (CRASHDEBUG(1))
fprintf(fp, "%s: add_symbol_file_kallsyms failed\n",
lm->mod_namelist);
FREEBUF(req->buf);
req->buf = NULL;
return FALSE;
+ */
}
/*
--
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