Jon Loeliger | fbcd54b | 2005-09-17 10:39:46 -0500 | [diff] [blame] | 1 | #ifndef _ASM_POWERPC_SECTIONS_H |
| 2 | #define _ASM_POWERPC_SECTIONS_H |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 3 | #ifdef __KERNEL__ |
Jon Loeliger | fbcd54b | 2005-09-17 10:39:46 -0500 | [diff] [blame] | 4 | |
James Bottomley | 2d291e9 | 2008-09-09 14:04:18 +0000 | [diff] [blame] | 5 | #include <linux/elf.h> |
| 6 | #include <linux/uaccess.h> |
Jon Loeliger | fbcd54b | 2005-09-17 10:39:46 -0500 | [diff] [blame] | 7 | #include <asm-generic/sections.h> |
| 8 | |
| 9 | #ifdef __powerpc64__ |
| 10 | |
Anton Blanchard | d715e43 | 2011-11-14 12:54:47 +0000 | [diff] [blame] | 11 | extern char __end_interrupts[]; |
Jon Loeliger | fbcd54b | 2005-09-17 10:39:46 -0500 | [diff] [blame] | 12 | |
Anton Blanchard | 5ac47f7 | 2012-11-26 17:39:03 +0000 | [diff] [blame] | 13 | extern char __prom_init_toc_start[]; |
| 14 | extern char __prom_init_toc_end[]; |
| 15 | |
Jon Loeliger | fbcd54b | 2005-09-17 10:39:46 -0500 | [diff] [blame] | 16 | static inline int in_kernel_text(unsigned long addr) |
| 17 | { |
| 18 | if (addr >= (unsigned long)_stext && addr < (unsigned long)__init_end) |
| 19 | return 1; |
| 20 | |
| 21 | return 0; |
| 22 | } |
| 23 | |
Paul Mackerras | 549e815 | 2008-08-30 11:43:47 +1000 | [diff] [blame] | 24 | static inline int overlaps_kernel_text(unsigned long start, unsigned long end) |
| 25 | { |
| 26 | return start < (unsigned long)__init_end && |
| 27 | (unsigned long)_stext < end; |
| 28 | } |
| 29 | |
James Bottomley | deac93d | 2008-09-03 20:43:36 -0500 | [diff] [blame] | 30 | #undef dereference_function_descriptor |
James Bottomley | 2d291e9 | 2008-09-09 14:04:18 +0000 | [diff] [blame] | 31 | static inline void *dereference_function_descriptor(void *ptr) |
| 32 | { |
| 33 | struct ppc64_opd_entry *desc = ptr; |
| 34 | void *p; |
| 35 | |
| 36 | if (!probe_kernel_address(&desc->funcaddr, p)) |
| 37 | ptr = p; |
| 38 | return ptr; |
| 39 | } |
James Bottomley | deac93d | 2008-09-03 20:43:36 -0500 | [diff] [blame] | 40 | |
Jon Loeliger | fbcd54b | 2005-09-17 10:39:46 -0500 | [diff] [blame] | 41 | #endif |
| 42 | |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 43 | #endif /* __KERNEL__ */ |
Jon Loeliger | fbcd54b | 2005-09-17 10:39:46 -0500 | [diff] [blame] | 44 | #endif /* _ASM_POWERPC_SECTIONS_H */ |