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Prepare for a core file image.

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This commit is contained in:
Naoki Hamada
2014-07-17 15:19:25 +09:00
parent cb9d346567
commit 3e8083efc1
3 changed files with 127 additions and 26 deletions
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47
executer/kernel/syscall.c
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@ -1180,7 +1180,7 @@ static int writecore(ihk_os_t os, unsigned long rcoretable, int chunks) {
set_fs(KERNEL_DS);
/* Every Linux documentation insists we should not
* open a file in the kernel module, but our karma makes
* open a file in the kernel module, but our karma
* leads us here. Precisely, Here we emulate the core
* dump routine of the Linux kernel in linux/fs/exec.c.
* So we have a legitimate reason to do this.
@ -1200,22 +1200,37 @@ static int writecore(ihk_os_t os, unsigned long rcoretable, int chunks) {
/* map and write the chunk out */
rphys = coretable[i].addr;
size = coretable[i].len;
dprintk("mapping remote %lx@%lx -> ", size, rphys);
phys = ihk_device_map_memory(dev, rphys, size);
dprintk("physical %lx, ", phys);
pt = ihk_device_map_virtual(dev, phys, size, NULL, 0);
dprintk("virtual %lx\n", pt);
if (pt != NULL) {
ret = file->f_op->write(file, pt, size, &file->f_pos);
} else {
dprintk("cannot map physical memory(%lx) to virtual memory.\n",
phys);
if (rphys != 0) {
dprintk("mapping remote %x@%lx -> ", size, rphys);
phys = ihk_device_map_memory(dev, rphys, size);
dprintk("physical %lx, ", phys);
pt = ihk_device_map_virtual(dev, phys, size, NULL, 0);
dprintk("virtual %p\n", pt);
if (pt != NULL) {
ret = file->f_op->write(file, pt, size, &file->f_pos);
} else {
dprintk("cannot map physical memory(%lx) to virtual memory.\n",
phys);
ihk_device_unmap_memory(dev, phys, size);
break;
}
/* unmap the chunk */
ihk_device_unmap_virtual(dev, pt, size);
ihk_device_unmap_memory(dev, phys, size);
break;
}
/* unmap the chunk */
ihk_device_unmap_virtual(dev, pt, size);
ihk_device_unmap_memory(dev, phys, size);
} else {
/* We skip if the physical address is NULL
and make the core file sparse. */
if (!file->f_op->llseek || (file->f_op->llseek == no_llseek)) {
dprintk("We have no llseek. The core file is truncated.\n");
error = -EINVAL;
}
ret = file->f_op->llseek(file, size, SEEK_CUR);
if (ret < 0) {
dprintk("core file seek failed(%d).\n", ret);
error = PTR_ERR(file);
break;
}
}
if (ret != size) {
dprintk("core file write failed(%d).\n", ret);
error = PTR_ERR(file);