Kernel analysis utility for live systems, netdump, diskdump, kdump, LKCD or mcore dumpfiles
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909 lines
30 KiB

commit 9596b4388ea5ebbf7de79f0e377a497de1616654
Author: Bhupesh Sharma <bhsharma@redhat.com>
Date: Thu Aug 6 13:17:26 2020 +0530
crash/arm64: Revert to implementation used in crash-7.2.3-17.el8 [Support for CONFIG_ARM64_USER_VA_BITS_52 and CONFIG_ARM64_PA_BITS=52]
Signed-off-by: Bhupesh Sharma <bhsharma@redhat.com>
diff --git a/arm64.c b/arm64.c
index 49e25733f094..dfcde6e11359 100644
--- a/arm64.c
+++ b/arm64.c
@@ -27,12 +27,9 @@
static struct machine_specific arm64_machine_specific = { 0 };
static int arm64_verify_symbol(const char *, ulong, char);
static void arm64_parse_cmdline_args(void);
-static int arm64_search_for_kimage_voffset(ulong);
-static int verify_kimage_voffset(void);
static void arm64_calc_kimage_voffset(void);
static void arm64_calc_phys_offset(void);
static void arm64_calc_virtual_memory_ranges(void);
-static void arm64_get_section_size_bits(void);
static int arm64_kdump_phys_base(ulong *);
static ulong arm64_processor_speed(void);
static void arm64_init_kernel_pgd(void);
@@ -81,7 +78,7 @@ static int arm64_on_irq_stack(int, ulong);
static void arm64_set_irq_stack(struct bt_info *);
static void arm64_set_process_stack(struct bt_info *);
static int arm64_get_kvaddr_ranges(struct vaddr_range *);
-static void arm64_get_crash_notes(void);
+static int arm64_get_crash_notes(void);
static void arm64_calc_VA_BITS(void);
static int arm64_is_uvaddr(ulong, struct task_context *);
@@ -147,12 +144,6 @@ arm64_init(int when)
if (kernel_symbol_exists("kimage_voffset"))
machdep->flags |= NEW_VMEMMAP;
- if (!machdep->pagesize &&
- (string = pc->read_vmcoreinfo("PAGESIZE"))) {
- machdep->pagesize = atoi(string);
- free(string);
- }
-
if (!machdep->pagesize) {
/*
* Kerneldoc Documentation/arm64/booting.txt describes
@@ -179,16 +170,17 @@ arm64_init(int when)
}
- /*
- * This code section will only be executed if the kernel is
- * earlier than Linux 4.4 (if there is no vmcoreinfo)
- */
if (!machdep->pagesize &&
kernel_symbol_exists("swapper_pg_dir") &&
kernel_symbol_exists("idmap_pg_dir")) {
- value = symbol_value("swapper_pg_dir") -
- symbol_value("idmap_pg_dir");
+ if (kernel_symbol_exists("tramp_pg_dir"))
+ value = symbol_value("tramp_pg_dir");
+ else if (kernel_symbol_exists("reserved_ttbr0"))
+ value = symbol_value("reserved_ttbr0");
+ else
+ value = symbol_value("swapper_pg_dir");
+ value -= symbol_value("idmap_pg_dir");
/*
* idmap_pg_dir is 2 pages prior to 4.1,
* and 3 pages thereafter. Only 4K and 64K
@@ -214,19 +206,12 @@ arm64_init(int when)
arm64_calc_VA_BITS();
ms = machdep->machspec;
- if (ms->VA_BITS_ACTUAL) {
- ms->page_offset = ARM64_PAGE_OFFSET_ACTUAL;
- machdep->identity_map_base = ARM64_PAGE_OFFSET_ACTUAL;
- machdep->kvbase = ARM64_PAGE_OFFSET_ACTUAL;
- ms->userspace_top = ARM64_USERSPACE_TOP_ACTUAL;
- } else {
- ms->page_offset = ARM64_PAGE_OFFSET;
- machdep->identity_map_base = ARM64_PAGE_OFFSET;
- machdep->kvbase = ARM64_VA_START;
- ms->userspace_top = ARM64_USERSPACE_TOP;
- }
+ ms->page_offset = ARM64_PAGE_OFFSET;
+ machdep->identity_map_base = ARM64_PAGE_OFFSET;
+ machdep->kvbase = ARM64_VA_START;
machdep->is_kvaddr = generic_is_kvaddr;
machdep->kvtop = arm64_kvtop;
+ ms->userspace_top = ARM64_USERSPACE_TOP;
if (machdep->flags & NEW_VMEMMAP) {
struct syment *sp;
@@ -235,15 +220,11 @@ arm64_init(int when)
sp = kernel_symbol_search("_end");
ms->kimage_end = (sp ? sp->value : 0);
- if (ms->VA_BITS_ACTUAL) {
- ms->modules_vaddr = (st->_stext_vmlinux & TEXT_OFFSET_MASK) - ARM64_MODULES_VSIZE;
- ms->modules_end = ms->modules_vaddr + ARM64_MODULES_VSIZE -1;
- } else {
- ms->modules_vaddr = ARM64_VA_START;
- if (kernel_symbol_exists("kasan_init"))
- ms->modules_vaddr += ARM64_KASAN_SHADOW_SIZE;
- ms->modules_end = ms->modules_vaddr + ARM64_MODULES_VSIZE -1;
- }
+ ms->modules_vaddr = ARM64_VA_START;
+ if (kernel_symbol_exists("kasan_init"))
+ ms->modules_vaddr += ARM64_KASAN_SHADOW_SIZE;
+ ms->modules_end = ms->modules_vaddr
+ + ARM64_MODULES_VSIZE -1;
ms->vmalloc_start_addr = ms->modules_end + 1;
@@ -285,7 +266,7 @@ arm64_init(int when)
case 65536:
if (kernel_symbol_exists("idmap_ptrs_per_pgd") &&
readmem(symbol_value("idmap_ptrs_per_pgd"), KVADDR,
- &value, sizeof(ulong), "idmap_ptrs_per_pgd", QUIET|RETURN_ON_ERROR))
+ &value, sizeof(ulong), "idmap_ptrs_per_pgd", RETURN_ON_ERROR))
machdep->ptrs_per_pgd = value;
if (machdep->machspec->VA_BITS > PGDIR_SHIFT_L3_64K) {
@@ -335,6 +316,10 @@ arm64_init(int when)
machdep->uvtop = arm64_uvtop;
machdep->is_uvaddr = arm64_is_uvaddr;
+ if (kernel_symbol_exists("vabits_user") &&
+ readmem(symbol_value("vabits_user"), KVADDR,
+ &value, sizeof(ulong), "vabits_user", RETURN_ON_ERROR))
+ machdep->machspec->vabits_user = value;
machdep->eframe_search = arm64_eframe_search;
machdep->back_trace = arm64_back_trace_cmd;
machdep->in_alternate_stack = arm64_in_alternate_stack;
@@ -375,8 +360,7 @@ arm64_init(int when)
case POST_GDB:
arm64_calc_virtual_memory_ranges();
- arm64_get_section_size_bits();
-
+ machdep->section_size_bits = _SECTION_SIZE_BITS;
if (!machdep->max_physmem_bits) {
if ((string = pc->read_vmcoreinfo("NUMBER(MAX_PHYSMEM_BITS)"))) {
machdep->max_physmem_bits = atol(string);
@@ -388,24 +372,8 @@ arm64_init(int when)
else
machdep->max_physmem_bits = _MAX_PHYSMEM_BITS;
}
-
ms = machdep->machspec;
- if (CRASHDEBUG(1)) {
- if (ms->VA_BITS_ACTUAL) {
- fprintf(fp, "CONFIG_ARM64_VA_BITS: %ld\n", ms->CONFIG_ARM64_VA_BITS);
- fprintf(fp, " VA_BITS_ACTUAL: %ld\n", ms->VA_BITS_ACTUAL);
- fprintf(fp, "(calculated) VA_BITS: %ld\n", ms->VA_BITS);
- fprintf(fp, " PAGE_OFFSET: %lx\n", ARM64_PAGE_OFFSET_ACTUAL);
- fprintf(fp, " VA_START: %lx\n", ms->VA_START);
- fprintf(fp, " modules: %lx - %lx\n", ms->modules_vaddr, ms->modules_end);
- fprintf(fp, " vmalloc: %lx - %lx\n", ms->vmalloc_start_addr, ms->vmalloc_end);
- fprintf(fp, "kernel image: %lx - %lx\n", ms->kimage_text, ms->kimage_end);
- fprintf(fp, " vmemmap: %lx - %lx\n\n", ms->vmemmap_vaddr, ms->vmemmap_end);
- }
- }
-
-
if (THIS_KERNEL_VERSION >= LINUX(4,0,0)) {
ms->__SWP_TYPE_BITS = 6;
ms->__SWP_TYPE_SHIFT = 2;
@@ -465,8 +433,11 @@ arm64_init(int when)
* of the crash. We need this information to extract correct
* backtraces from the panic task.
*/
- if (!LIVE())
- arm64_get_crash_notes();
+ if (!LIVE() && !arm64_get_crash_notes())
+ error(WARNING,
+ "cannot retrieve registers for active task%s\n\n",
+ kt->cpus > 1 ? "s" : "");
+
break;
case LOG_ONLY:
@@ -648,15 +619,9 @@ arm64_dump_machdep_table(ulong arg)
fprintf(fp, " machspec: %lx\n", (ulong)ms);
fprintf(fp, " VA_BITS: %ld\n", ms->VA_BITS);
- fprintf(fp, " CONFIG_ARM64_VA_BITS: %ld\n", ms->CONFIG_ARM64_VA_BITS);
- fprintf(fp, " VA_START: ");
- if (ms->VA_START)
- fprintf(fp, "%lx\n", ms->VA_START);
- else
- fprintf(fp, "(unused)\n");
- fprintf(fp, " VA_BITS_ACTUAL: ");
- if (ms->VA_BITS_ACTUAL)
- fprintf(fp, "%ld\n", ms->VA_BITS_ACTUAL);
+ fprintf(fp, " vabits_user: ");
+ if (ms->vabits_user)
+ fprintf(fp, "%ld\n", ms->vabits_user);
else
fprintf(fp, "(unused)\n");
fprintf(fp, " userspace_top: %016lx\n", ms->userspace_top);
@@ -745,12 +710,12 @@ arm64_parse_machdep_arg_l(char *argstring, char *param, ulong *value)
int flags = RETURN_ON_ERROR | QUIET;
int err = 0;
- if (STRNEQ(argstring, "max_physmem_bits")) {
- *value = dtol(p, flags, &err);
- } else if (megabytes) {
+ if (megabytes) {
*value = dtol(p, flags, &err);
if (!err)
*value = MEGABYTES(*value);
+ } else if (STRNEQ(argstring, "max_physmem_bits")) {
+ *value = dtol(p, flags, &err);
} else {
*value = htol(p, flags, &err);
}
@@ -824,60 +789,11 @@ arm64_parse_cmdline_args(void)
}
}
-#define MIN_KIMG_ALIGN (0x00200000) /* kimage load address must be aligned 2M */
-/*
- * Traverse the entire dumpfile to find/verify kimage_voffset.
- */
-static int
-arm64_search_for_kimage_voffset(ulong phys_base)
-{
- ulong kimage_load_addr;
- ulong phys_end;
- struct machine_specific *ms = machdep->machspec;
-
- if (!arm_kdump_phys_end(&phys_end))
- return FALSE;
-
- for (kimage_load_addr = phys_base;
- kimage_load_addr <= phys_end; kimage_load_addr += MIN_KIMG_ALIGN) {
- ms->kimage_voffset = ms->vmalloc_start_addr - kimage_load_addr;
-
- if ((kt->flags2 & KASLR) && (kt->flags & RELOC_SET))
- ms->kimage_voffset += (kt->relocate * - 1);
-
- if (verify_kimage_voffset()) {
- if (CRASHDEBUG(1))
- error(INFO,
- "dumpfile searched for kimage_voffset: %lx\n\n",
- ms->kimage_voffset);
- break;
- }
- }
-
- if (kimage_load_addr > phys_end)
- return FALSE;
-
- return TRUE;
-}
-
-static int
-verify_kimage_voffset(void)
-{
- ulong kimage_voffset;
-
- if (!readmem(symbol_value("kimage_voffset"), KVADDR, &kimage_voffset,
- sizeof(kimage_voffset), "verify kimage_voffset", QUIET|RETURN_ON_ERROR))
- return FALSE;
-
- return (machdep->machspec->kimage_voffset == kimage_voffset);
-}
-
static void
arm64_calc_kimage_voffset(void)
{
struct machine_specific *ms = machdep->machspec;
- ulong phys_addr = 0;
- int errflag;
+ ulong phys_addr;
if (ms->kimage_voffset) /* vmcoreinfo, ioctl, or --machdep override */
return;
@@ -885,6 +801,7 @@ arm64_calc_kimage_voffset(void)
if (ACTIVE()) {
char buf[BUFSIZE];
char *p1;
+ int errflag;
FILE *iomem;
ulong kimage_voffset, vaddr;
@@ -925,24 +842,9 @@ arm64_calc_kimage_voffset(void)
if (errflag)
return;
- } else if (KDUMP_DUMPFILE()) {
- errflag = 1;
- if (arm_kdump_phys_base(&phys_addr)) { /* Get start address of first memory block */
- ms->kimage_voffset = ms->vmalloc_start_addr - phys_addr;
- if ((kt->flags2 & KASLR) && (kt->flags & RELOC_SET))
- ms->kimage_voffset += (kt->relocate * -1);
- if (verify_kimage_voffset() || arm64_search_for_kimage_voffset(phys_addr))
- errflag = 0;
- }
-
- if (errflag) {
- error(WARNING,
- "kimage_voffset cannot be determined from the dumpfile.\n");
- error(CONT,
- "Try using the command line option: --machdep kimage_voffset=<addr>\n");
- }
- return;
- } else {
+ } else if (KDUMP_DUMPFILE())
+ arm_kdump_phys_base(&phys_addr); /* Get start address of first memory block */
+ else {
error(WARNING,
"kimage_voffset cannot be determined from the dumpfile.\n");
error(CONT,
@@ -981,16 +883,10 @@ arm64_calc_phys_offset(void)
physaddr_t paddr;
ulong vaddr;
struct syment *sp;
- char *string;
if ((machdep->flags & NEW_VMEMMAP) &&
ms->kimage_voffset && (sp = kernel_symbol_search("memstart_addr"))) {
if (pc->flags & PROC_KCORE) {
- if ((string = pc->read_vmcoreinfo("NUMBER(PHYS_OFFSET)"))) {
- ms->phys_offset = htol(string, QUIET, NULL);
- free(string);
- return;
- }
vaddr = symbol_value_from_proc_kallsyms("memstart_addr");
if (vaddr == BADVAL)
vaddr = sp->value;
@@ -1053,31 +949,6 @@ arm64_calc_phys_offset(void)
fprintf(fp, "using %lx as phys_offset\n", ms->phys_offset);
}
-/*
- * Determine SECTION_SIZE_BITS either by reading VMCOREINFO or the kernel
- * config, otherwise use the 64-bit ARM default definiton.
- */
-static void
-arm64_get_section_size_bits(void)
-{
- int ret;
- char *string;
-
- machdep->section_size_bits = _SECTION_SIZE_BITS;
-
- if ((string = pc->read_vmcoreinfo("NUMBER(SECTION_SIZE_BITS)"))) {
- machdep->section_size_bits = atol(string);
- free(string);
- } else if (kt->ikconfig_flags & IKCONFIG_AVAIL) {
- if ((ret = get_kernel_config("CONFIG_MEMORY_HOTPLUG", NULL)) == IKCONFIG_Y) {
- if ((ret = get_kernel_config("CONFIG_HOTPLUG_SIZE_BITS", &string)) == IKCONFIG_STR)
- machdep->section_size_bits = atol(string);
- }
- }
-
- if (CRASHDEBUG(1))
- fprintf(fp, "SECTION_SIZE_BITS: %ld\n", machdep->section_size_bits);
-}
/*
* Determine PHYS_OFFSET either by reading VMCOREINFO or the kernel
@@ -1133,12 +1004,6 @@ ulong
arm64_VTOP(ulong addr)
{
if (machdep->flags & NEW_VMEMMAP) {
- if (machdep->machspec->VA_START &&
- (addr >= machdep->machspec->kimage_text) &&
- (addr <= machdep->machspec->kimage_end)) {
- return addr - machdep->machspec->kimage_voffset;
- }
-
if (addr >= machdep->machspec->page_offset)
return machdep->machspec->phys_offset
+ (addr - machdep->machspec->page_offset);
@@ -1215,11 +1080,6 @@ arm64_uvtop(struct task_context *tc, ulong uvaddr, physaddr_t *paddr, int verbos
}
}
-#define PTE_ADDR_LOW ((((1UL) << (48 - machdep->pageshift)) - 1) << machdep->pageshift)
-#define PTE_ADDR_HIGH ((0xfUL) << 12)
-#define PTE_TO_PHYS(pteval) (machdep->max_physmem_bits == 52 ? \
- (((pteval & PTE_ADDR_LOW) | ((pteval & PTE_ADDR_HIGH) << 36))) : (pteval & PTE_ADDR_LOW))
-
#define PMD_TYPE_MASK 3
#define PMD_TYPE_SECT 1
#define PMD_TYPE_TABLE 2
@@ -1312,7 +1172,7 @@ arm64_vtop_3level_64k(ulong pgd, ulong vaddr, physaddr_t *paddr, int verbose)
* #define __PAGETABLE_PUD_FOLDED
*/
- pmd_base = (ulong *)PTOV(PTE_TO_PHYS(pgd_val));
+ pmd_base = (ulong *)PTOV(pgd_val & PHYS_MASK & (s32)machdep->pagemask);
FILL_PMD(pmd_base, KVADDR, PTRS_PER_PMD_L3_64K * sizeof(ulong));
pmd_ptr = pmd_base + (((vaddr) >> PMD_SHIFT_L3_64K) & (PTRS_PER_PMD_L3_64K - 1));
pmd_val = ULONG(machdep->pmd + PAGEOFFSET(pmd_ptr));
@@ -1322,7 +1182,7 @@ arm64_vtop_3level_64k(ulong pgd, ulong vaddr, physaddr_t *paddr, int verbose)
goto no_page;
if ((pmd_val & PMD_TYPE_MASK) == PMD_TYPE_SECT) {
- ulong sectionbase = PTE_TO_PHYS(pmd_val) & SECTION_PAGE_MASK_512MB;
+ ulong sectionbase = (pmd_val & SECTION_PAGE_MASK_512MB) & PHYS_MASK;
if (verbose) {
fprintf(fp, " PAGE: %lx (512MB)\n\n", sectionbase);
arm64_translate_pte(pmd_val, 0, 0);
@@ -1331,7 +1191,7 @@ arm64_vtop_3level_64k(ulong pgd, ulong vaddr, physaddr_t *paddr, int verbose)
return TRUE;
}
- pte_base = (ulong *)PTOV(PTE_TO_PHYS(pmd_val));
+ pte_base = (ulong *)PTOV(pmd_val & PHYS_MASK & (s32)machdep->pagemask);
FILL_PTBL(pte_base, KVADDR, PTRS_PER_PTE_L3_64K * sizeof(ulong));
pte_ptr = pte_base + (((vaddr) >> machdep->pageshift) & (PTRS_PER_PTE_L3_64K - 1));
pte_val = ULONG(machdep->ptbl + PAGEOFFSET(pte_ptr));
@@ -1341,7 +1201,7 @@ arm64_vtop_3level_64k(ulong pgd, ulong vaddr, physaddr_t *paddr, int verbose)
goto no_page;
if (pte_val & PTE_VALID) {
- *paddr = PTE_TO_PHYS(pte_val) + PAGEOFFSET(vaddr);
+ *paddr = (PAGEBASE(pte_val) & PHYS_MASK) + PAGEOFFSET(vaddr);
if (verbose) {
fprintf(fp, " PAGE: %lx\n\n", PAGEBASE(*paddr));
arm64_translate_pte(pte_val, 0, 0);
@@ -1644,11 +1504,10 @@ arm64_stackframe_init(void)
machdep->machspec->kern_eframe_offset = SIZE(pt_regs);
}
- if ((sp1 = kernel_symbol_search("__exception_text_start")) &&
- (sp2 = kernel_symbol_search("__exception_text_end"))) {
- machdep->machspec->__exception_text_start = sp1->value;
- machdep->machspec->__exception_text_end = sp2->value;
- }
+ machdep->machspec->__exception_text_start =
+ symbol_value("__exception_text_start");
+ machdep->machspec->__exception_text_end =
+ symbol_value("__exception_text_end");
if ((sp1 = kernel_symbol_search("__irqentry_text_start")) &&
(sp2 = kernel_symbol_search("__irqentry_text_end"))) {
machdep->machspec->__irqentry_text_start = sp1->value;
@@ -1857,38 +1716,20 @@ arm64_eframe_search(struct bt_info *bt)
return count;
}
-static char *arm64_exception_functions[] = {
- "do_undefinstr",
- "do_sysinstr",
- "do_debug_exception",
- "do_mem_abort",
- "do_el0_irq_bp_hardening",
- "do_sp_pc_abort",
- NULL
-};
-
static int
arm64_in_exception_text(ulong ptr)
{
struct machine_specific *ms = machdep->machspec;
- char *name, **func;
+
+ if ((ptr >= ms->__exception_text_start) &&
+ (ptr < ms->__exception_text_end))
+ return TRUE;
if (ms->__irqentry_text_start && ms->__irqentry_text_end &&
((ptr >= ms->__irqentry_text_start) &&
(ptr < ms->__irqentry_text_end)))
return TRUE;
- if (ms->__exception_text_start && ms->__exception_text_end) {
- if ((ptr >= ms->__exception_text_start) &&
- (ptr < ms->__exception_text_end))
- return TRUE;
- } else if ((name = closest_symbol(ptr))) { /* Linux 5.5 and later */
- for (func = &arm64_exception_functions[0]; *func; func++) {
- if (STREQ(name, *func))
- return TRUE;
- }
- }
-
return FALSE;
}
@@ -3297,7 +3138,7 @@ arm64_translate_pte(ulong pte, void *physaddr, ulonglong unused)
char *arglist[MAXARGS];
int page_present;
- paddr = PTE_TO_PHYS(pte);
+ paddr = pte & PHYS_MASK & (s32)machdep->pagemask;
page_present = pte & (PTE_VALID | machdep->machspec->PTE_PROT_NONE);
if (physaddr) {
@@ -3563,8 +3404,8 @@ arm64_display_machine_stats(void)
fprintf(fp, " HZ: %d\n", machdep->hz);
fprintf(fp, " PAGE SIZE: %d\n", PAGESIZE());
fprintf(fp, "KERNEL VIRTUAL BASE: %lx\n", machdep->machspec->page_offset);
- fprintf(fp, "KERNEL MODULES BASE: %lx\n", machdep->machspec->modules_vaddr);
fprintf(fp, "KERNEL VMALLOC BASE: %lx\n", machdep->machspec->vmalloc_start_addr);
+ fprintf(fp, "KERNEL MODULES BASE: %lx\n", machdep->machspec->modules_vaddr);
fprintf(fp, "KERNEL VMEMMAP BASE: %lx\n", machdep->machspec->vmemmap_vaddr);
fprintf(fp, " KERNEL STACK SIZE: %ld\n", STACKSIZE());
if (machdep->machspec->irq_stack_size) {
@@ -3594,7 +3435,7 @@ arm64_get_smp_cpus(void)
/*
* Retrieve task registers for the time of the crash.
*/
-static void
+static int
arm64_get_crash_notes(void)
{
struct machine_specific *ms = machdep->machspec;
@@ -3603,10 +3444,10 @@ arm64_get_crash_notes(void)
ulong offset;
char *buf, *p;
ulong *notes_ptrs;
- ulong i, found;
+ ulong i;
if (!symbol_exists("crash_notes"))
- return;
+ return FALSE;
crash_notes = symbol_value("crash_notes");
@@ -3618,9 +3459,9 @@ arm64_get_crash_notes(void)
*/
if (!readmem(crash_notes, KVADDR, &notes_ptrs[kt->cpus-1],
sizeof(notes_ptrs[kt->cpus-1]), "crash_notes", RETURN_ON_ERROR)) {
- error(WARNING, "cannot read \"crash_notes\"\n");
+ error(WARNING, "cannot read crash_notes\n");
FREEBUF(notes_ptrs);
- return;
+ return FALSE;
}
if (symbol_exists("__per_cpu_offset")) {
@@ -3636,11 +3477,12 @@ arm64_get_crash_notes(void)
if (!(ms->panic_task_regs = calloc((size_t)kt->cpus, sizeof(struct arm64_pt_regs))))
error(FATAL, "cannot calloc panic_task_regs space\n");
- for (i = found = 0; i < kt->cpus; i++) {
+ for (i = 0; i < kt->cpus; i++) {
+
if (!readmem(notes_ptrs[i], KVADDR, buf, SIZE(note_buf),
"note_buf_t", RETURN_ON_ERROR)) {
- error(WARNING, "cpu %d: cannot read NT_PRSTATUS note\n", i);
- continue;
+ error(WARNING, "failed to read note_buf_t\n");
+ goto fail;
}
/*
@@ -3670,24 +3512,19 @@ arm64_get_crash_notes(void)
note->n_descsz == notesz)
BCOPY((char *)note, buf, notesz);
} else {
- error(WARNING, "cpu %d: cannot find NT_PRSTATUS note\n", i);
+ error(WARNING,
+ "cannot find NT_PRSTATUS note for cpu: %d\n", i);
continue;
}
}
- /*
- * Check the sanity of NT_PRSTATUS note only for each online cpu.
- * If this cpu has invalid note, continue to find the crash notes
- * for other online cpus.
- */
if (note->n_type != NT_PRSTATUS) {
- error(WARNING, "cpu %d: invalid NT_PRSTATUS note (n_type != NT_PRSTATUS)\n", i);
- continue;
+ error(WARNING, "invalid note (n_type != NT_PRSTATUS)\n");
+ goto fail;
}
-
- if (!STRNEQ(p, "CORE")) {
- error(WARNING, "cpu %d: invalid NT_PRSTATUS note (name != \"CORE\")\n", i);
- continue;
+ if (p[0] != 'C' || p[1] != 'O' || p[2] != 'R' || p[3] != 'E') {
+ error(WARNING, "invalid note (name != \"CORE\"\n");
+ goto fail;
}
/*
@@ -3700,17 +3537,18 @@ arm64_get_crash_notes(void)
BCOPY(p + OFFSET(elf_prstatus_pr_reg), &ms->panic_task_regs[i],
sizeof(struct arm64_pt_regs));
-
- found++;
}
FREEBUF(buf);
FREEBUF(notes_ptrs);
+ return TRUE;
- if (!found) {
- free(ms->panic_task_regs);
- ms->panic_task_regs = NULL;
- }
+fail:
+ FREEBUF(buf);
+ FREEBUF(notes_ptrs);
+ free(ms->panic_task_regs);
+ ms->panic_task_regs = NULL;
+ return FALSE;
}
static void
@@ -3834,9 +3672,6 @@ arm64_IS_VMALLOC_ADDR(ulong vaddr)
(vaddr <= machdep->machspec->kimage_end))
return FALSE;
- if (ms->VA_START && (vaddr >= ms->VA_START))
- return TRUE;
-
return ((vaddr >= ms->vmalloc_start_addr && vaddr <= ms->vmalloc_end) ||
((machdep->flags & VMEMMAP) &&
(vaddr >= ms->vmemmap_vaddr && vaddr <= ms->vmemmap_end)) ||
@@ -3848,54 +3683,9 @@ arm64_calc_VA_BITS(void)
{
int bitval;
struct syment *sp;
- ulong vabits_actual, value;
+ ulong value;
char *string;
- if ((string = pc->read_vmcoreinfo("NUMBER(VA_BITS)"))) {
- value = atol(string);
- free(string);
- machdep->machspec->CONFIG_ARM64_VA_BITS = value;
- }
-
- if (kernel_symbol_exists("vabits_actual")) {
- if (pc->flags & PROC_KCORE) {
- vabits_actual = symbol_value_from_proc_kallsyms("vabits_actual");
- if ((vabits_actual != BADVAL) && (READMEM(pc->mfd, &value, sizeof(ulong),
- vabits_actual, KCORE_USE_VADDR) > 0)) {
- if (CRASHDEBUG(1))
- fprintf(fp,
- "/proc/kcore: vabits_actual: %ld\n", value);
- machdep->machspec->VA_BITS_ACTUAL = value;
- machdep->machspec->VA_BITS = value;
- machdep->machspec->VA_START = _VA_START(machdep->machspec->VA_BITS_ACTUAL);
- } else
- error(FATAL, "/proc/kcore: cannot read vabits_actual\n");
- } else if (ACTIVE())
- error(FATAL, "cannot determine VA_BITS_ACTUAL: please use /proc/kcore\n");
- else {
- if ((string = pc->read_vmcoreinfo("NUMBER(TCR_EL1_T1SZ)"))) {
- /* See ARMv8 ARM for the description of
- * TCR_EL1.T1SZ and how it can be used
- * to calculate the vabits_actual
- * supported by underlying kernel.
- *
- * Basically:
- * vabits_actual = 64 - T1SZ;
- */
- value = 64 - strtoll(string, NULL, 0);
- if (CRASHDEBUG(1))
- fprintf(fp, "vmcoreinfo : vabits_actual: %ld\n", value);
- free(string);
- machdep->machspec->VA_BITS_ACTUAL = value;
- machdep->machspec->VA_BITS = value;
- machdep->machspec->VA_START = _VA_START(machdep->machspec->VA_BITS_ACTUAL);
- } else
- error(FATAL, "cannot determine VA_BITS_ACTUAL\n");
- }
-
- return;
- }
-
if (!(sp = symbol_search("swapper_pg_dir")) &&
!(sp = symbol_search("idmap_pg_dir")) &&
!(sp = symbol_search("_text")) &&
@@ -3924,12 +3714,14 @@ arm64_calc_VA_BITS(void)
/*
* Verify against dumpfiles that export VA_BITS in vmcoreinfo
*/
- if (machdep->machspec->CONFIG_ARM64_VA_BITS &&
- (machdep->machspec->VA_BITS != machdep->machspec->CONFIG_ARM64_VA_BITS)) {
- error(WARNING, "VA_BITS: calculated: %ld vmcoreinfo: %ld\n",
- machdep->machspec->VA_BITS, machdep->machspec->CONFIG_ARM64_VA_BITS);
- machdep->machspec->VA_BITS = machdep->machspec->CONFIG_ARM64_VA_BITS;
- }
+ if ((string = pc->read_vmcoreinfo("NUMBER(VA_BITS)"))) {
+ value = atol(string);
+ free(string);
+ if (machdep->machspec->VA_BITS != value)
+ error(WARNING, "VA_BITS: calculated: %ld vmcoreinfo: %ld\n",
+ machdep->machspec->VA_BITS, value);
+ }
+
if (CRASHDEBUG(1))
fprintf(fp, "VA_BITS: %ld\n", machdep->machspec->VA_BITS);
@@ -3947,15 +3739,6 @@ arm64_calc_VA_BITS(void)
*
* Since VMEMMAP_SIZE is dependent upon the size of a struct page,
* the two ranges cannot be determined until POST_GDB.
- *
- * Since 52-bit VA was introduced:
- *
- * #define STRUCT_PAGE_MAX_SHIFT 6
- * #define VMEMMAP_SIZE (UL(1) << (VA_BITS - PAGE_SHIFT - 1 + STRUCT_PAGE_MAX_SHIFT))
- * #define VMEMMAP_START (-VMEMMAP_SIZE)
- * #define VMALLOC_START (MODULES_END)
- * #define VMALLOC_END (- PUD_SIZE - VMEMMAP_SIZE - SZ_64K)
- * #define vmemmap ((struct page *)VMEMMAP_START - (memstart_addr >> PAGE_SHIFT))
*/
#define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
@@ -3967,18 +3750,10 @@ static void
arm64_calc_virtual_memory_ranges(void)
{
struct machine_specific *ms = machdep->machspec;
- ulong value, vmemmap_start, vmemmap_end, vmemmap_size, vmalloc_end;
- char *string;
+ ulong vmemmap_start, vmemmap_end, vmemmap_size;
+ ulong vmalloc_end;
ulong PUD_SIZE = UNINITIALIZED;
- if (!machdep->machspec->CONFIG_ARM64_VA_BITS) {
- if ((string = pc->read_vmcoreinfo("NUMBER(VA_BITS)"))) {
- value = atol(string);
- free(string);
- machdep->machspec->CONFIG_ARM64_VA_BITS = value;
- }
- }
-
if (THIS_KERNEL_VERSION < LINUX(3,17,0)) /* use original hardwired values */
return;
@@ -3997,19 +3772,8 @@ arm64_calc_virtual_memory_ranges(void)
break;
}
-#define STRUCT_PAGE_MAX_SHIFT 6
-
- if (ms->VA_BITS_ACTUAL) {
- vmemmap_size = (1UL) << (ms->CONFIG_ARM64_VA_BITS - machdep->pageshift - 1 + STRUCT_PAGE_MAX_SHIFT);
- vmalloc_end = (- PUD_SIZE - vmemmap_size - KILOBYTES(64));
- vmemmap_start = (-vmemmap_size);
- ms->vmalloc_end = vmalloc_end - 1;
- ms->vmemmap_vaddr = vmemmap_start;
- ms->vmemmap_end = -1;
- return;
- }
-
if (machdep->flags & NEW_VMEMMAP)
+#define STRUCT_PAGE_MAX_SHIFT 6
vmemmap_size = 1UL << (ms->VA_BITS - machdep->pageshift - 1
+ STRUCT_PAGE_MAX_SHIFT);
else
@@ -4033,7 +3797,7 @@ arm64_calc_virtual_memory_ranges(void)
static int
arm64_is_uvaddr(ulong addr, struct task_context *tc)
{
- return (addr < machdep->machspec->userspace_top);
+ return (addr < ARM64_USERSPACE_TOP);
}
diff --git a/defs.h b/defs.h
index ac24a5d730d5..d0b021f61c67 100644
--- a/defs.h
+++ b/defs.h
@@ -3148,17 +3148,9 @@ typedef signed int s32;
*/
#define ARM64_VA_START ((0xffffffffffffffffUL) \
<< machdep->machspec->VA_BITS)
-#define _VA_START(va) ((0xffffffffffffffffUL) - \
- ((1UL) << ((va) - 1)) + 1)
-#define TEXT_OFFSET_MASK (~((MEGABYTES(2UL))-1))
-
#define ARM64_PAGE_OFFSET ((0xffffffffffffffffUL) \
<< (machdep->machspec->VA_BITS - 1))
-#define ARM64_PAGE_OFFSET_ACTUAL ((0xffffffffffffffffUL) \
- - ((1UL) << machdep->machspec->VA_BITS_ACTUAL) + 1)
-
#define ARM64_USERSPACE_TOP ((1UL) << machdep->machspec->VA_BITS)
-#define ARM64_USERSPACE_TOP_ACTUAL ((1UL) << machdep->machspec->VA_BITS_ACTUAL)
/* only used for v4.6 or later */
#define ARM64_MODULES_VSIZE MEGABYTES(128)
@@ -3261,9 +3253,7 @@ struct machine_specific {
ulong kern_eframe_offset;
ulong machine_kexec_start;
ulong machine_kexec_end;
- ulong VA_BITS_ACTUAL;
- ulong CONFIG_ARM64_VA_BITS;
- ulong VA_START;
+ ulong vabits_user;
};
struct arm64_stackframe {
diff --git a/netdump.c b/netdump.c
index 0054d6ab35b4..31ab6fae5ccd 100644
--- a/netdump.c
+++ b/netdump.c
@@ -1228,19 +1228,7 @@ netdump_memory_dump(FILE *fp)
if (machine_type("X86_64"))
netdump_print("%lx (relocate)\n", nd->arch_data1);
else if (machine_type("ARM64"))
- netdump_print("%lx (kimage_voffset)\n", nd->arch_data1);
- } else
- netdump_print("(unused)\n");
- netdump_print(" arch_data2: ");
- if (nd->arch_data2) {
- if (machine_type("ARM64"))
- netdump_print("%016lx\n"
- " CONFIG_ARM64_VA_BITS: %ld\n"
- " VA_BITS_ACTUAL: %lld\n",
- nd->arch_data2, nd->arch_data2 & 0xffffffff,
- ((ulonglong)nd->arch_data2 >> 32));
- else
- netdump_print("%016lx (?)\n", nd->arch_data2);
+ netdump_print("%lx (kimage_voffset)\n", nd->arch_data);
} else
netdump_print("(unused)\n");
netdump_print(" switch_stack: %lx\n", nd->switch_stack);
@@ -1865,8 +1853,7 @@ vmcoreinfo_read_string(const char *key)
int i, j, end;
size_t value_length;
size_t key_length = strlen(key);
- char *vmcoreinfo;
- uint size_vmcoreinfo;
+ char *vmcoreinfo = (char *)nd->vmcoreinfo;
char *value = NULL;
/*
@@ -1875,49 +1862,25 @@ vmcoreinfo_read_string(const char *key)
* the NT_TASKSTRUCT note.
*/
if ((pc->flags2 & SNAP)) {
- if (STREQ(key, "NUMBER(kimage_voffset)") && nd->arch_data1) {
+ if (STREQ(key, "NUMBER(kimage_voffset)") && nd->arch_data) {
value = calloc(VADDR_PRLEN+1, sizeof(char));
- sprintf(value, "%lx", nd->arch_data1);
- if (nd->arch_data2 == 0)
- pc->read_vmcoreinfo = no_vmcoreinfo;
- return value;
- }
- if (STREQ(key, "NUMBER(VA_BITS)") && nd->arch_data2) {
- value = calloc(VADDR_PRLEN+1, sizeof(char));
- sprintf(value, "%ld", nd->arch_data2 & 0xffffffff);
- return value;
- }
- if (STREQ(key, "NUMBER(TCR_EL1_T1SZ)") && nd->arch_data2) {
- value = calloc(VADDR_PRLEN+1, sizeof(char));
- sprintf(value, "%lld", ((ulonglong)nd->arch_data2 >> 32) & 0xffffffff);
+ sprintf(value, "%lx", nd->arch_data);
pc->read_vmcoreinfo = no_vmcoreinfo;
return value;
}
- if (STREQ(key, "relocate") && nd->arch_data1) {
+ if (STREQ(key, "relocate") && nd->arch_data) {
value = calloc(VADDR_PRLEN+1, sizeof(char));
- sprintf(value, "%lx", nd->arch_data1);
+ sprintf(value, "%lx", nd->arch_data);
pc->read_vmcoreinfo = no_vmcoreinfo;
return value;
}
- return NULL;
- }
-
- if (nd->vmcoreinfo) {
- vmcoreinfo = (char *)nd->vmcoreinfo;
- size_vmcoreinfo = nd->size_vmcoreinfo;
- } else if (ACTIVE() && pkd->vmcoreinfo) {
- vmcoreinfo = (char *)pkd->vmcoreinfo;
- size_vmcoreinfo = pkd->size_vmcoreinfo;
- } else {
- vmcoreinfo = NULL;
- size_vmcoreinfo = 0;
}
- if (!vmcoreinfo)
+ if (!nd->vmcoreinfo)
return NULL;
/* the '+ 1' is the equal sign */
- for (i = 0; i < (int)(size_vmcoreinfo - key_length + 1); i++) {
+ for (i = 0; i < (nd->size_vmcoreinfo - key_length + 1); i++) {
/*
* We must also check if we're at the beginning of VMCOREINFO
* or the separating newline is there, and of course if we
@@ -1931,7 +1894,7 @@ vmcoreinfo_read_string(const char *key)
/* Found -- search for the next newline. */
for (j = i + key_length + 1;
- j < size_vmcoreinfo; j++) {
+ j < nd->size_vmcoreinfo; j++) {
if (vmcoreinfo[j] == '\n') {
end = j;
break;
@@ -1944,7 +1907,7 @@ vmcoreinfo_read_string(const char *key)
*/
if (end == -1) {
/* Point after the end. */
- end = size_vmcoreinfo + 1;
+ end = nd->size_vmcoreinfo + 1;
}
value_length = end - (1+ i + key_length);