mirror of https://github.com/crash-utility/crash
arm64: Add gdb stack unwind support
Signed-off-by: Tao Liu <ltao@redhat.com>
This commit is contained in:
Tao Liu
Lianbo Jiang
parent
89ff1e4573
commit
968debd0d5
120
arm64.c
120
arm64.c
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@ -121,6 +121,11 @@ static void arm64_get_struct_page_size(struct machine_specific *ms);
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#define mte_tag_reset(addr) (((ulong)addr & ~mte_tag_shifted(KASAN_TAG_KERNEL)) | \
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mte_tag_shifted(KASAN_TAG_KERNEL))
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struct user_regs_bitmap_struct {
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struct arm64_pt_regs ur;
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ulong bitmap[32];
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};
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static inline bool is_mte_kvaddr(ulong addr)
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{
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/* check for ARM64_MTE enabled */
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@ -197,6 +202,94 @@ out:
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machdep->is_page_ptr = arm64_vmemmap_is_page_ptr;
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}
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static int
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arm64_get_current_task_reg(int regno, const char *name,
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int size, void *value)
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{
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struct bt_info bt_info, bt_setup;
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struct task_context *tc;
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struct user_regs_bitmap_struct *ur_bitmap;
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ulong ip, sp;
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bool ret = FALSE;
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switch (regno) {
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case X0_REGNUM ... PC_REGNUM:
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break;
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default:
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return FALSE;
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}
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tc = CURRENT_CONTEXT();
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if (!tc)
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return FALSE;
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BZERO(&bt_setup, sizeof(struct bt_info));
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clone_bt_info(&bt_setup, &bt_info, tc);
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fill_stackbuf(&bt_info);
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get_dumpfile_regs(&bt_info, &sp, &ip);
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if (bt_info.stackbuf)
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FREEBUF(bt_info.stackbuf);
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ur_bitmap = (struct user_regs_bitmap_struct *)bt_info.machdep;
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if (!ur_bitmap)
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return FALSE;
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if (!bt_info.need_free) {
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goto get_all;
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}
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switch (regno) {
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case X0_REGNUM ... X30_REGNUM:
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if (!NUM_IN_BITMAP(ur_bitmap->bitmap,
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REG_SEQ(arm64_pt_regs, regs[0]) + regno - X0_REGNUM)) {
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FREEBUF(ur_bitmap);
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return FALSE;
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}
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break;
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case SP_REGNUM:
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if (!NUM_IN_BITMAP(ur_bitmap->bitmap,
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REG_SEQ(arm64_pt_regs, sp))) {
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FREEBUF(ur_bitmap);
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return FALSE;
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}
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break;
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case PC_REGNUM:
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if (!NUM_IN_BITMAP(ur_bitmap->bitmap,
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REG_SEQ(arm64_pt_regs, pc))) {
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FREEBUF(ur_bitmap);
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return FALSE;
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}
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break;
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}
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get_all:
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switch (regno) {
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case X0_REGNUM ... X30_REGNUM:
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if (size != sizeof(ur_bitmap->ur.regs[regno]))
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break;
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memcpy(value, &ur_bitmap->ur.regs[regno], size);
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ret = TRUE;
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break;
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case SP_REGNUM:
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if (size != sizeof(ur_bitmap->ur.sp))
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break;
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memcpy(value, &ur_bitmap->ur.sp, size);
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ret = TRUE;
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break;
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case PC_REGNUM:
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if (size != sizeof(ur_bitmap->ur.pc))
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break;
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memcpy(value, &ur_bitmap->ur.pc, size);
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ret = TRUE;
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break;
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}
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if (bt_info.need_free) {
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FREEBUF(ur_bitmap);
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bt_info.need_free = FALSE;
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}
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return ret;
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}
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/*
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* Do all necessary machine-specific setup here. This is called several times
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* during initialization.
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@ -549,6 +642,7 @@ arm64_init(int when)
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machdep->dumpfile_init = NULL;
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machdep->verify_line_number = NULL;
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machdep->init_kernel_pgd = arm64_init_kernel_pgd;
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machdep->get_current_task_reg = arm64_get_current_task_reg;
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/* use machdep parameters */
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arm64_calc_phys_offset();
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@ -683,6 +777,7 @@ arm64_init(int when)
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*/
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if (!LIVE())
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arm64_get_crash_notes();
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gdb_change_thread_context();
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break;
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case LOG_ONLY:
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@ -4134,6 +4229,7 @@ arm64_get_dumpfile_stackframe(struct bt_info *bt, struct arm64_stackframe *frame
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try_kernel:
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frame->sp = ptregs->sp;
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frame->fp = ptregs->regs[29];
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bt->machdep = ptregs;
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}
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if (arm64_in_kdump_text(bt, frame) ||
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@ -4162,22 +4258,30 @@ arm64_get_stackframe(struct bt_info *bt, struct arm64_stackframe *frame)
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static void
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arm64_get_stack_frame(struct bt_info *bt, ulong *pcp, ulong *spp)
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{
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int ret;
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struct user_regs_bitmap_struct *ur_bitmap;
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struct arm64_stackframe stackframe = { 0 };
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if (DUMPFILE() && is_task_active(bt->task)) {
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ret = arm64_get_dumpfile_stackframe(bt, &stackframe);
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arm64_get_dumpfile_stackframe(bt, &stackframe);
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bt->need_free = FALSE;
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} else {
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if (bt->flags & BT_SKIP_IDLE)
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bt->flags &= ~BT_SKIP_IDLE;
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ret = arm64_get_stackframe(bt, &stackframe);
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}
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arm64_get_stackframe(bt, &stackframe);
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if (!ret)
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error(WARNING,
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"cannot determine starting stack frame for task %lx\n",
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bt->task);
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ur_bitmap = (struct user_regs_bitmap_struct *)GETBUF(sizeof(*ur_bitmap));
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memset(ur_bitmap, 0, sizeof(*ur_bitmap));
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ur_bitmap->ur.pc = stackframe.pc;
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ur_bitmap->ur.sp = stackframe.sp;
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ur_bitmap->ur.regs[29] = stackframe.fp;
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SET_BIT(ur_bitmap->bitmap, REG_SEQ(arm64_pt_regs, pc));
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SET_BIT(ur_bitmap->bitmap, REG_SEQ(arm64_pt_regs, sp));
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SET_BIT(ur_bitmap->bitmap, REG_SEQ(arm64_pt_regs, regs[0])
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+ X29_REGNUM - X0_REGNUM);
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bt->machdep = ur_bitmap;
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bt->need_free = TRUE;
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}
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bt->frameptr = stackframe.fp;
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if (pcp)
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36
defs.h
36
defs.h
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@ -8143,6 +8143,42 @@ enum x86_64_regnum {
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LAST_REGNUM
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};
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enum arm64_regnum {
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X0_REGNUM,
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X1_REGNUM,
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X2_REGNUM,
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X3_REGNUM,
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X4_REGNUM,
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X5_REGNUM,
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X6_REGNUM,
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X7_REGNUM,
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X8_REGNUM,
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X9_REGNUM,
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X10_REGNUM,
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X11_REGNUM,
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X12_REGNUM,
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X13_REGNUM,
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X14_REGNUM,
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X15_REGNUM,
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X16_REGNUM,
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X17_REGNUM,
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X18_REGNUM,
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X19_REGNUM,
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X20_REGNUM,
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X21_REGNUM,
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X22_REGNUM,
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X23_REGNUM,
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X24_REGNUM,
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X25_REGNUM,
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X26_REGNUM,
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X27_REGNUM,
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X28_REGNUM,
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X29_REGNUM,
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X30_REGNUM,
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SP_REGNUM,
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PC_REGNUM,
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};
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/*
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* Register numbers to make crash_target->fetch_registers()
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* ---> machdep->get_current_task_reg() work properly.
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