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Undefined instruction handling/ipc revised, tests added, cleaned up.

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This commit is contained in:
Bahadir Balban
2009-12-04 15:22:56 +02:00
parent 93dc1ed49e
commit 2908c40816
7 changed files with 43 additions and 32 deletions
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28
src/arch/arm/exception.c
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@@ -62,13 +62,13 @@ void ipc_restore_state(struct ipc_state *state)
}
/* Send data fault ipc to the faulty task's pager */
int fault_ipc_to_pager(u32 faulty_pc, u32 fsr, u32 far)
int fault_ipc_to_pager(u32 faulty_pc, u32 fsr, u32 far, u32 ipc_tag)
{
int err;
/* mr[0] has the fault tag. The rest is the fault structure */
u32 mr[MR_TOTAL] = {
[MR_TAG] = L4_IPC_TAG_PFAULT,
[MR_TAG] = ipc_tag,
[MR_SENDER] = current->tid
};
@@ -165,7 +165,8 @@ int pager_pagein_request(unsigned long addr, unsigned long size,
/* For every page to be used by the kernel send a page-in request */
for (int i = 0; i < npages; i++)
if ((err = fault_ipc_to_pager(0, abort,
addr + (i * PAGE_SIZE))) < 0)
addr + (i * PAGE_SIZE),
L4_IPC_TAG_PFAULT)) < 0)
return err;
/* Restore ipc state */
@@ -277,7 +278,7 @@ void data_abort_handler(u32 faulted_pc, u32 fsr, u32 far)
goto error;
/* This notifies the pager */
fault_ipc_to_pager(faulted_pc, fsr, far);
fault_ipc_to_pager(faulted_pc, fsr, far, L4_IPC_TAG_PFAULT);
if (current->flags & TASK_SUSPENDING) {
BUG_ON(current->nlocks);
@@ -310,7 +311,7 @@ void prefetch_abort_handler(u32 faulted_pc, u32 fsr, u32 far, u32 lr)
if (KERN_ADDR(lr))
goto error;
fault_ipc_to_pager(faulted_pc, fsr, far);
fault_ipc_to_pager(faulted_pc, fsr, far, L4_IPC_TAG_PFAULT);
if (current->flags & TASK_SUSPENDING) {
BUG_ON(current->nlocks);
@@ -336,17 +337,18 @@ error:
void undef_handler(u32 undef_addr, u32 spsr, u32 lr)
{
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");
dbg_abort("Undefined instruction @ PC: ", undef_addr);
//printk("Undefined instruction: tid: %d, PC: 0x%x, Mode: %s\n",
// current->tid, undef_addr,
// (spsr & ARM_MODE_MASK) == ARM_MODE_SVC ? "SVC" : "User");
if (KERN_ADDR(lr)) {
printk("Panic: Undef in Kernel\n");
goto error;
}
fault_ipc_to_pager(undef_addr, 0, undef_addr);
fault_ipc_to_pager(undef_addr, 0, undef_addr, L4_IPC_TAG_UNDEF_FAULT);
if (current->flags & TASK_SUSPENDING) {
BUG_ON(current->nlocks);
@@ -359,6 +361,10 @@ void undef_handler(u32 undef_addr, u32 spsr, u32 lr)
return;
error:
disable_irqs();
dprintk("SPSR:", spsr);
dprintk("LR:", lr);
printascii("Kernel panic.\n");
printascii("Halting system...\n");
BUG();
}