s390/exceptions: switch to relative exception table entries
This is the s390 port of 70627654 "x86, extable: Switch to relative
exception table entries".
Reduces the size of our exception tables by 50% on 64 bit builds.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index f4bcdc0..e8000d5 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -255,14 +255,14 @@
static void early_pgm_check_handler(void)
{
- unsigned long addr;
const struct exception_table_entry *fixup;
+ unsigned long addr;
addr = S390_lowcore.program_old_psw.addr;
fixup = search_exception_tables(addr & PSW_ADDR_INSN);
if (!fixup)
disabled_wait(0);
- S390_lowcore.program_old_psw.addr = fixup->fixup | PSW_ADDR_AMODE;
+ S390_lowcore.program_old_psw.addr = extable_fixup(fixup)|PSW_ADDR_AMODE;
}
static noinline __init void setup_lowcore_early(void)
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 95e9d93..7549985 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -10,6 +10,7 @@
#include <linux/init.h>
#include <linux/linkage.h>
+#include <asm/processor.h>
#include <asm/cache.h>
#include <asm/errno.h>
#include <asm/ptrace.h>
@@ -1008,9 +1009,7 @@
.Lhost_id:
.quad 0
- .section __ex_table,"a"
- .quad sie_loop,sie_fault
- .previous
+ EX_TABLE(sie_loop,sie_fault)
#endif
.section .rodata, "a"
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index 8aa634f..d1c7214 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -547,7 +547,7 @@
*/
entry = search_exception_tables(regs->psw.addr & PSW_ADDR_INSN);
if (entry) {
- regs->psw.addr = entry->fixup | PSW_ADDR_AMODE;
+ regs->psw.addr = extable_fixup(entry) | PSW_ADDR_AMODE;
return 1;
}
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 29af526..befc761 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -322,7 +322,7 @@
const struct exception_table_entry *fixup;
fixup = search_exception_tables(regs->psw.addr & PSW_ADDR_INSN);
if (fixup)
- regs->psw.addr = fixup->fixup | PSW_ADDR_AMODE;
+ regs->psw.addr = extable_fixup(fixup) | PSW_ADDR_AMODE;
else {
enum bug_trap_type btt;