diff options
Diffstat (limited to 'arch/powerpc/lib')
| -rw-r--r-- | arch/powerpc/lib/Makefile | 2 | ||||
| -rw-r--r-- | arch/powerpc/lib/restart_table.c | 30 |
2 files changed, 31 insertions, 1 deletions
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile index cc1a8a0f311e..4c92c80454f3 100644 --- a/arch/powerpc/lib/Makefile +++ b/arch/powerpc/lib/Makefile @@ -42,7 +42,7 @@ obj-$(CONFIG_PPC_BOOK3S_64) += copyuser_power7.o copypage_power7.o \ memcpy_power7.o obj64-y += copypage_64.o copyuser_64.o mem_64.o hweight_64.o \ - memcpy_64.o copy_mc_64.o + memcpy_64.o copy_mc_64.o restart_table.o ifndef CONFIG_PPC_QUEUED_SPINLOCKS obj64-$(CONFIG_SMP) += locks.o diff --git a/arch/powerpc/lib/restart_table.c b/arch/powerpc/lib/restart_table.c new file mode 100644 index 000000000000..7cd20757cc33 --- /dev/null +++ b/arch/powerpc/lib/restart_table.c @@ -0,0 +1,30 @@ +#include <asm/interrupt.h> +#include <asm/kprobes.h> + +struct restart_table_entry { + unsigned long start; + unsigned long end; + unsigned long fixup; +}; + +extern struct restart_table_entry __start___restart_table[]; +extern struct restart_table_entry __stop___restart_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); |