diff options
Diffstat (limited to 'arch/powerpc/lib/restart_table.c')
-rw-r--r-- | arch/powerpc/lib/restart_table.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/powerpc/lib/restart_table.c b/arch/powerpc/lib/restart_table.c new file mode 100644 index 0000000000..bccb662c1b --- /dev/null +++ b/arch/powerpc/lib/restart_table.c @@ -0,0 +1,56 @@ +#include <asm/interrupt.h> +#include <asm/kprobes.h> + +struct soft_mask_table_entry { + unsigned long start; + unsigned long end; +}; + +struct restart_table_entry { + unsigned long start; + unsigned long end; + unsigned long fixup; +}; + +extern struct soft_mask_table_entry __start___soft_mask_table[]; +extern struct soft_mask_table_entry __stop___soft_mask_table[]; + +extern struct restart_table_entry __start___restart_table[]; +extern struct restart_table_entry __stop___restart_table[]; + +/* Given an address, look for it in the soft mask table */ +bool search_kernel_soft_mask_table(unsigned long addr) +{ + struct soft_mask_table_entry *smte = __start___soft_mask_table; + + while (smte < __stop___soft_mask_table) { + unsigned long start = smte->start; + unsigned long end = smte->end; + + if (addr >= start && addr < end) + return true; + + smte++; + } + return false; +} +NOKPROBE_SYMBOL(search_kernel_soft_mask_table); + +/* Given an address, look for it in the kernel exception table */ +unsigned long search_kernel_restart_table(unsigned long addr) +{ + struct restart_table_entry *rte = __start___restart_table; + + while (rte < __stop___restart_table) { + unsigned long start = rte->start; + unsigned long end = rte->end; + unsigned long fixup = rte->fixup; + + if (addr >= start && addr < end) + return fixup; + + rte++; + } + return 0; +} +NOKPROBE_SYMBOL(search_kernel_restart_table); |