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Reimplemented kill/suspend

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It seems to work fine except an undefined instruction is generated
from posix userspace occasionally
This commit is contained in:
Bahadir Balban
2009-10-30 21:34:10 +02:00
parent f3c0a38fa9
commit c3c6c10cf7
10 changed files with 114 additions and 157 deletions
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15
src/arch/arm/exception.c
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@@ -113,7 +113,7 @@ void fault_ipc_to_pager(u32 faulty_pc, u32 fsr, u32 far)
if (current->tid == current->pagerid) {
printk("Pager (%d) faulted on itself. FAR: 0x%x, PC: 0x%x Exiting.\n",
current->tid, fault->far, fault->faulty_pc);
thread_destroy_current();
thread_destroy(current);
}
/* Send ipc to the task's pager */
@@ -124,11 +124,9 @@ void fault_ipc_to_pager(u32 faulty_pc, u32 fsr, u32 far)
current->tid, err);
BUG_ON(current->nlocks);
/* Declare our exit, currently only used by bug_on checks */
/* Exit as if signalled */
current->flags |= TASK_EXITING;
/* Try to die forever */
while (1)
sched_die_sync();
sched_exit_sync();
}
}
@@ -256,6 +254,8 @@ void data_abort_handler(u32 faulted_pc, u32 fsr, u32 far)
dbg_abort("Data abort @ PC: ", faulted_pc);
//printk("Data abort: %d, PC: 0x%x\n", current->tid, faulted_pc);
/* Check for more details */
if (check_aborts(faulted_pc, fsr, far) < 0) {
printascii("This abort can't be handled by any pager.\n");
@@ -304,9 +304,12 @@ error:
;
}
void dump_undef_abort(u32 undef_addr)
void dump_undef_abort(u32 undef_addr, unsigned int spsr)
{
dprintk("Undefined instruction at address: ", undef_addr);
printk("Undefined instruction: %d, PC: 0x%x, Mode: %s\n",
current->tid, undef_addr,
(spsr & ARM_MODE_MASK) == ARM_MODE_SVC ? "SVC" : "User");
printascii("Halting system...\n");
BUG();
}

1
src/arch/arm/vectors.S
View File

@@ -55,6 +55,7 @@ END_PROC(arm_reset_exception)
BEGIN_PROC(arm_undef_exception)
sub lr, lr, #4
mov r0, lr @ Get undefined abort address
mrs r1, spsr @ Get previous abort state
mov r5, lr @ Save it in r5 in case r0 is trashed
mov lr, pc @ Save return address
ldr pc, =dump_undef_abort