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kprobe: update example with px

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Going to try and upstream this later on
This commit is contained in:
Ciro Santilli
2018-07-05 09:49:59 +01:00
parent 046bc25b6b
commit 3d4e0c095d
3 changed files with 35 additions and 33 deletions
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36
kernel_module/kprobe_example.c
View File

@@ -1,5 +1,3 @@
/* Upstream: https://github.com/torvalds/linux/blob/v4.16/samples/kprobes/kprobe_example.c */
/*
* NOTE: This example is works on x86 and powerpc.
* Here's a sample kernel module showing the use of kprobes to dump a
@@ -29,28 +27,24 @@ static struct kprobe kp = {
static int handler_pre(struct kprobe *p, struct pt_regs *regs)
{
#ifdef CONFIG_X86
pr_info("<%s> pre_handler: p->addr = 0x%p, ip = %lx, flags = 0x%lx\n",
pr_info("<%s> pre_handler: p->addr = 0x%px, ip = %lx, flags = 0x%lx\n",
p->symbol_name, p->addr, regs->ip, regs->flags);
#endif
#ifdef CONFIG_PPC
pr_info("<%s> pre_handler: p->addr = 0x%p, nip = 0x%lx, msr = 0x%lx\n",
pr_info("<%s> pre_handler: p->addr = 0x%px, nip = 0x%lx, msr = 0x%lx\n",
p->symbol_name, p->addr, regs->nip, regs->msr);
#endif
#ifdef CONFIG_MIPS
pr_info("<%s> pre_handler: p->addr = 0x%p, epc = 0x%lx, status = 0x%lx\n",
pr_info("<%s> pre_handler: p->addr = 0x%px, epc = 0x%lx, status = 0x%lx\n",
p->symbol_name, p->addr, regs->cp0_epc, regs->cp0_status);
#endif
#ifdef CONFIG_TILEGX
pr_info("<%s> pre_handler: p->addr = 0x%p, pc = 0x%lx, ex1 = 0x%lx\n",
p->symbol_name, p->addr, regs->pc, regs->ex1);
#endif
#ifdef CONFIG_ARM64
pr_info("<%s> pre_handler: p->addr = 0x%p, pc = 0x%lx,"
pr_info("<%s> pre_handler: p->addr = 0x%px, pc = 0x%lx,"
" pstate = 0x%lx\n",
p->symbol_name, p->addr, (long)regs->pc, (long)regs->pstate);
#endif
#ifdef CONFIG_S390
pr_info("<%s> pre_handler: p->addr, 0x%p, ip = 0x%lx, flags = 0x%lx\n",
pr_info("<%s> pre_handler: p->addr, 0x%px, ip = 0x%lx, flags = 0x%lx\n",
p->symbol_name, p->addr, regs->psw.addr, regs->flags);
#endif
@@ -63,27 +57,23 @@ static void handler_post(struct kprobe *p, struct pt_regs *regs,
unsigned long flags)
{
#ifdef CONFIG_X86
pr_info("<%s> post_handler: p->addr = 0x%p, flags = 0x%lx\n",
pr_info("<%s> post_handler: p->addr = 0x%px, flags = 0x%lx\n",
p->symbol_name, p->addr, regs->flags);
#endif
#ifdef CONFIG_PPC
pr_info("<%s> post_handler: p->addr = 0x%p, msr = 0x%lx\n",
pr_info("<%s> post_handler: p->addr = 0x%px, msr = 0x%lx\n",
p->symbol_name, p->addr, regs->msr);
#endif
#ifdef CONFIG_MIPS
pr_info("<%s> post_handler: p->addr = 0x%p, status = 0x%lx\n",
pr_info("<%s> post_handler: p->addr = 0x%px, status = 0x%lx\n",
p->symbol_name, p->addr, regs->cp0_status);
#endif
#ifdef CONFIG_TILEGX
pr_info("<%s> post_handler: p->addr = 0x%p, ex1 = 0x%lx\n",
p->symbol_name, p->addr, regs->ex1);
#endif
#ifdef CONFIG_ARM64
pr_info("<%s> post_handler: p->addr = 0x%p, pstate = 0x%lx\n",
pr_info("<%s> post_handler: p->addr = 0x%px, pstate = 0x%lx\n",
p->symbol_name, p->addr, (long)regs->pstate);
#endif
#ifdef CONFIG_S390
pr_info("<%s> pre_handler: p->addr, 0x%p, flags = 0x%lx\n",
pr_info("<%s> pre_handler: p->addr, 0x%px, flags = 0x%lx\n",
p->symbol_name, p->addr, regs->flags);
#endif
}
@@ -95,7 +85,7 @@ static void handler_post(struct kprobe *p, struct pt_regs *regs,
*/
static int handler_fault(struct kprobe *p, struct pt_regs *regs, int trapnr)
{
pr_info("fault_handler: p->addr = 0x%p, trap #%dn", p->addr, trapnr);
pr_info("fault_handler: p->addr = 0x%px, trap #%dn", p->addr, trapnr);
/* Return 0 because we don't handle the fault. */
return 0;
}
@@ -112,14 +102,14 @@ static int __init kprobe_init(void)
pr_err("register_kprobe failed, returned %d\n", ret);
return ret;
}
pr_info("Planted kprobe at %p\n", kp.addr);
pr_info("Planted kprobe at %px\n", kp.addr);
return 0;
}
static void __exit kprobe_exit(void)
{
unregister_kprobe(&kp);
pr_info("kprobe at %p unregistered\n", kp.addr);
pr_info("kprobe at %px unregistered\n", kp.addr);
}
module_init(kprobe_init)

4
kernel_module/pci.c
View File

@@ -207,7 +207,7 @@ static int pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
/* RAM -> device. */
vaddr_from = dma_alloc_coherent(&(dev->dev), 4, &dma_handle_from, GFP_ATOMIC);
dev_info(&(dev->dev), "vaddr_from = %p\n", vaddr_from);
dev_info(&(dev->dev), "vaddr_from = %px\n", vaddr_from);
dev_info(&(dev->dev), "dma_handle_from = %llx\n", (unsigned long long)dma_handle_from);
*((volatile u32*)vaddr_from) = 0x12345678;
iowrite32((u32)dma_handle_from, mmio + IO_DMA_SRC);
@@ -217,7 +217,7 @@ static int pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
/* device -> RAM. */
vaddr_to = dma_alloc_coherent(&(dev->dev), 4, &dma_handle_to, GFP_ATOMIC);
dev_info(&(dev->dev), "vaddr_to = %p\n", vaddr_to);
dev_info(&(dev->dev), "vaddr_to = %px\n", vaddr_to);
dev_info(&(dev->dev), "dma_handle_to = %llx\n", (unsigned long long)dma_handle_to);
/*
iowrite32(DMA_BASE, mmio + IO_DMA_SRC);