3rd-party/linux-kernel-module-cheat
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Ciro Santilli
2017-07-15 10:48:42 +01:00
parent 5ec0858244
commit d189b651ec
2 changed files with 3 additions and 1 deletions
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2
README.md
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@@ -136,6 +136,8 @@ However, when you do:
it gets overwritten by a fresh filesystem and you lose all changes. it gets overwritten by a fresh filesystem and you lose all changes.
Using text mode is another workaround if you don't need GUI features.
## Text mode ## Text mode
Show serial output of QEMU directly on the current terminal, without opening a QEMU window: Show serial output of QEMU directly on the current terminal, without opening a QEMU window:

2
kernel_module/virt_to_phys.c
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@@ -56,7 +56,7 @@ static const struct file_operations fops = {
static int myinit(void) static int myinit(void)
{ {
i = kmalloc(sizeof(loff_t), GFP_KERNEL); i = kmalloc(sizeof(i), GFP_KERNEL);
*i = 0x12345678; *i = 0x12345678;
debugfs_file = debugfs_create_file( debugfs_file = debugfs_create_file(
"lkmc_virt_to_phys", S_IRUSR, NULL, NULL, &fops); "lkmc_virt_to_phys", S_IRUSR, NULL, NULL, &fops);