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Load the stack in stack_save and stack_save_td. This uses the generalised

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unwind_frame function to read each stack frame until either the pc or stack
are no longer withing the kernel's address space.

Obtained from:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Andrew Turner 2015-07-31 15:32:32 +00:00
parent 45e1c1a38d
commit 176739d3f5
2 changed files with 32 additions and 4 deletions
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32
sys/arm64/arm64/stack_machdep.c
View File

@ -40,21 +40,49 @@ __FBSDID("$FreeBSD$");
#include <machine/pcb.h>
#include <machine/stack.h>
static void
stack_capture(struct stack *st, struct unwind_state *frame)
{
stack_zero(st);
while (1) {
unwind_frame(frame);
if (!INKERNEL((vm_offset_t)frame->fp) ||
!INKERNEL((vm_offset_t)frame->pc))
break;
if (stack_put(st, frame->pc) == -1)
break;
}
}
void
stack_save_td(struct stack *st, struct thread *td)
{
struct unwind_state frame;
if (TD_IS_SWAPPED(td))
panic("stack_save_td: swapped");
if (TD_IS_RUNNING(td))
panic("stack_save_td: running");
stack_zero(st); /* ARM64TODO */
frame.sp = td->td_pcb->pcb_sp;
frame.fp = td->td_pcb->pcb_x[29];
frame.pc = td->td_pcb->pcb_x[30];
stack_capture(st, &frame);
}
void
stack_save(struct stack *st)
{
struct unwind_state frame;
uint64_t sp;
stack_zero(st); /* ARM64TODO */
__asm __volatile("mov %0, sp" : "=&r" (sp));
frame.sp = sp;
frame.fp = (uint64_t)__builtin_frame_address(0);
frame.pc = (uint64_t)stack_save;
stack_capture(st, &frame);
}

4
sys/conf/files.arm64
View File

@ -40,14 +40,14 @@ arm64/arm64/mp_machdep.c optional smp
arm64/arm64/nexus.c standard
arm64/arm64/pic_if.m standard
arm64/arm64/pmap.c standard
arm64/arm64/stack_machdep.c standard
arm64/arm64/stack_machdep.c optional ddb | stack
arm64/arm64/support.S standard
arm64/arm64/swtch.S standard
arm64/arm64/sys_machdep.c standard
arm64/arm64/trap.c standard
arm64/arm64/uio_machdep.c standard
arm64/arm64/uma_machdep.c standard
arm64/arm64/unwind.c optional ddb | kdtrace_hooks
arm64/arm64/unwind.c optional ddb | kdtrace_hooks | stack
arm64/arm64/vfp.c standard
arm64/arm64/vm_machdep.c standard
crypto/blowfish/bf_enc.c optional crypto | ipsec