Unverified Commit cdd1b2bd authored by Jisheng Zhang's avatar Jisheng Zhang Committed by Palmer Dabbelt
Browse files

riscv: kprobes: Implement alloc_insn_page()



Allocate PAGE_KERNEL_READ_EXEC(read only, executable) page for kprobes
insn page. This is to prepare for STRICT_MODULE_RWX.
Signed-off-by: default avatarJisheng Zhang <jszhang@kernel.org>
Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
parent 300f62c3
......@@ -84,6 +84,14 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
return 0;
}
void *alloc_insn_page(void)
{
return __vmalloc_node_range(PAGE_SIZE, 1, VMALLOC_START, VMALLOC_END,
GFP_KERNEL, PAGE_KERNEL_READ_EXEC,
VM_FLUSH_RESET_PERMS, NUMA_NO_NODE,
__builtin_return_address(0));
}
/* install breakpoint in text */
void __kprobes arch_arm_kprobe(struct kprobe *p)
{
......
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