blob: 6e4af4492a14490335d78d139872e4f469d46449 [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0 */
#ifdef __KERNEL__
#include <linux/elf.h>
#include <linux/uaccess.h>
#define arch_is_kernel_initmem_freed arch_is_kernel_initmem_freed
#include <asm-generic/sections.h>
extern bool init_mem_is_free;
static inline int arch_is_kernel_initmem_freed(unsigned long addr)
if (!init_mem_is_free)
return 0;
return addr >= (unsigned long)__init_begin &&
addr < (unsigned long)__init_end;
extern char __head_end[];
#ifdef __powerpc64__
extern char __start_interrupts[];
extern char __end_interrupts[];
extern char __prom_init_toc_start[];
extern char __prom_init_toc_end[];
extern char start_real_trampolines[];
extern char end_real_trampolines[];
extern char start_virt_trampolines[];
extern char end_virt_trampolines[];
static inline unsigned long kernel_toc_addr(void)
/* Defined by the linker, see */
extern unsigned long __toc_start;
* The TOC register (r2) points 32kB into the TOC, so that 64kB of
* the TOC can be addressed using a single machine instruction.
return (unsigned long)(&__toc_start) + 0x8000UL;
static inline int overlaps_interrupt_vector_text(unsigned long start,
unsigned long end)
unsigned long real_start, real_end;
real_start = __start_interrupts - _stext;
real_end = __end_interrupts - _stext;
return start < (unsigned long)__va(real_end) &&
(unsigned long)__va(real_start) < end;
static inline int overlaps_kernel_text(unsigned long start, unsigned long end)
return start < (unsigned long)__init_end &&
(unsigned long)_stext < end;
#ifdef PPC64_ELF_ABI_v1
#undef dereference_function_descriptor
static inline void *dereference_function_descriptor(void *ptr)
struct ppc64_opd_entry *desc = ptr;
void *p;
if (!get_kernel_nofault(p, (void *)&desc->funcaddr))
ptr = p;
return ptr;
#undef dereference_kernel_function_descriptor
static inline void *dereference_kernel_function_descriptor(void *ptr)
if (ptr < (void *)__start_opd || ptr >= (void *)__end_opd)
return ptr;
return dereference_function_descriptor(ptr);
#endif /* PPC64_ELF_ABI_v1 */
#endif /* __KERNEL__ */