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-rw-r--r--arch/s390/kernel/Makefile2
-rw-r--r--arch/s390/kernel/entry.h21
-rw-r--r--arch/s390/kernel/entry64.S4
-rw-r--r--arch/s390/kernel/pgm_check.S152
-rw-r--r--arch/s390/kernel/traps.c52
5 files changed, 182 insertions, 49 deletions
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 4da52fe31743..2ac311ef5c9b 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -23,7 +23,7 @@ CFLAGS_sysinfo.o += -Iinclude/math-emu -Iarch/s390/math-emu -w
obj-y := bitmap.o traps.o time.o process.o base.o early.o setup.o vtime.o \
processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o \
debug.o irq.o ipl.o dis.o diag.o mem_detect.o sclp.o vdso.o \
- sysinfo.o jump_label.o lgr.o os_info.o machine_kexec.o
+ sysinfo.o jump_label.o lgr.o os_info.o machine_kexec.o pgm_check.o
obj-y += $(if $(CONFIG_64BIT),entry64.o,entry.o)
obj-y += $(if $(CONFIG_64BIT),reipl64.o,reipl.o)
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index d0d3f69a7346..80ebb985f3b9 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -6,7 +6,6 @@
#include <asm/ptrace.h>
#include <asm/cputime.h>
-extern void (*pgm_check_table[128])(struct pt_regs *);
extern void *restart_stack;
void system_call(void);
@@ -25,6 +24,26 @@ void do_protection_exception(struct pt_regs *regs);
void do_dat_exception(struct pt_regs *regs);
void do_asce_exception(struct pt_regs *regs);
+void addressing_exception(struct pt_regs *regs);
+void data_exception(struct pt_regs *regs);
+void default_trap_handler(struct pt_regs *regs);
+void divide_exception(struct pt_regs *regs);
+void execute_exception(struct pt_regs *regs);
+void hfp_divide_exception(struct pt_regs *regs);
+void hfp_overflow_exception(struct pt_regs *regs);
+void hfp_significance_exception(struct pt_regs *regs);
+void hfp_sqrt_exception(struct pt_regs *regs);
+void hfp_underflow_exception(struct pt_regs *regs);
+void illegal_op(struct pt_regs *regs);
+void operand_exception(struct pt_regs *regs);
+void overflow_exception(struct pt_regs *regs);
+void privileged_op(struct pt_regs *regs);
+void space_switch_exception(struct pt_regs *regs);
+void special_op_exception(struct pt_regs *regs);
+void specification_exception(struct pt_regs *regs);
+void transaction_exception(struct pt_regs *regs);
+void translation_exception(struct pt_regs *regs);
+
void do_per_trap(struct pt_regs *regs);
void syscall_trace(struct pt_regs *regs, int entryexit);
void kernel_stack_overflow(struct pt_regs * regs);
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 07d8de353984..e42842a3072b 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -429,9 +429,9 @@ ENTRY(pgm_check_handler)
larl %r1,pgm_check_table
llgh %r10,__PT_INT_CODE+2(%r11)
nill %r10,0x007f
- sll %r10,3
+ sll %r10,2
je sysc_return
- lg %r1,0(%r10,%r1) # load address of handler routine
+ lgf %r1,0(%r10,%r1) # load address of handler routine
lgr %r2,%r11 # pass pointer to pt_regs
basr %r14,%r1 # branch to interrupt-handler
j sysc_return
diff --git a/arch/s390/kernel/pgm_check.S b/arch/s390/kernel/pgm_check.S
new file mode 100644
index 000000000000..14bdecb61923
--- /dev/null
+++ b/arch/s390/kernel/pgm_check.S
@@ -0,0 +1,152 @@
+/*
+ * Program check table.
+ *
+ * Copyright IBM Corp. 2012
+ */
+
+#include <linux/linkage.h>
+
+#ifdef CONFIG_32BIT
+#define PGM_CHECK_64BIT(handler) .long default_trap_handler
+#else
+#define PGM_CHECK_64BIT(handler) .long handler
+#endif
+
+#define PGM_CHECK(handler) .long handler
+#define PGM_CHECK_DEFAULT PGM_CHECK(default_trap_handler)
+
+/*
+ * The program check table contains exactly 128 (0x00-0x7f) entries. Each
+ * line defines the 31 and/or 64 bit function to be called corresponding
+ * to the program check interruption code.
+ */
+.section .rodata, "a"
+ENTRY(pgm_check_table)
+PGM_CHECK_DEFAULT /* 00 */
+PGM_CHECK(illegal_op) /* 01 */
+PGM_CHECK(privileged_op) /* 02 */
+PGM_CHECK(execute_exception) /* 03 */
+PGM_CHECK(do_protection_exception) /* 04 */
+PGM_CHECK(addressing_exception) /* 05 */
+PGM_CHECK(specification_exception) /* 06 */
+PGM_CHECK(data_exception) /* 07 */
+PGM_CHECK(overflow_exception) /* 08 */
+PGM_CHECK(divide_exception) /* 09 */
+PGM_CHECK(overflow_exception) /* 0a */
+PGM_CHECK(divide_exception) /* 0b */
+PGM_CHECK(hfp_overflow_exception) /* 0c */
+PGM_CHECK(hfp_underflow_exception) /* 0d */
+PGM_CHECK(hfp_significance_exception) /* 0e */
+PGM_CHECK(hfp_divide_exception) /* 0f */
+PGM_CHECK(do_dat_exception) /* 10 */
+PGM_CHECK(do_dat_exception) /* 11 */
+PGM_CHECK(translation_exception) /* 12 */
+PGM_CHECK(special_op_exception) /* 13 */
+PGM_CHECK_DEFAULT /* 14 */
+PGM_CHECK(operand_exception) /* 15 */
+PGM_CHECK_DEFAULT /* 16 */
+PGM_CHECK_DEFAULT /* 17 */
+PGM_CHECK_64BIT(transaction_exception) /* 18 */
+PGM_CHECK_DEFAULT /* 19 */
+PGM_CHECK_DEFAULT /* 1a */
+PGM_CHECK_DEFAULT /* 1b */
+PGM_CHECK(space_switch_exception) /* 1c */
+PGM_CHECK(hfp_sqrt_exception) /* 1d */
+PGM_CHECK_DEFAULT /* 1e */
+PGM_CHECK_DEFAULT /* 1f */
+PGM_CHECK_DEFAULT /* 20 */
+PGM_CHECK_DEFAULT /* 21 */
+PGM_CHECK_DEFAULT /* 22 */
+PGM_CHECK_DEFAULT /* 23 */
+PGM_CHECK_DEFAULT /* 24 */
+PGM_CHECK_DEFAULT /* 25 */
+PGM_CHECK_DEFAULT /* 26 */
+PGM_CHECK_DEFAULT /* 27 */
+PGM_CHECK_DEFAULT /* 28 */
+PGM_CHECK_DEFAULT /* 29 */
+PGM_CHECK_DEFAULT /* 2a */
+PGM_CHECK_DEFAULT /* 2b */
+PGM_CHECK_DEFAULT /* 2c */
+PGM_CHECK_DEFAULT /* 2d */
+PGM_CHECK_DEFAULT /* 2e */
+PGM_CHECK_DEFAULT /* 2f */
+PGM_CHECK_DEFAULT /* 30 */
+PGM_CHECK_DEFAULT /* 31 */
+PGM_CHECK_DEFAULT /* 32 */
+PGM_CHECK_DEFAULT /* 33 */
+PGM_CHECK_DEFAULT /* 34 */
+PGM_CHECK_DEFAULT /* 35 */
+PGM_CHECK_DEFAULT /* 36 */
+PGM_CHECK_DEFAULT /* 37 */
+PGM_CHECK_64BIT(do_asce_exception) /* 38 */
+PGM_CHECK_64BIT(do_dat_exception) /* 39 */
+PGM_CHECK_64BIT(do_dat_exception) /* 3a */
+PGM_CHECK_64BIT(do_dat_exception) /* 3b */
+PGM_CHECK_DEFAULT /* 3c */
+PGM_CHECK_DEFAULT /* 3d */
+PGM_CHECK_DEFAULT /* 3e */
+PGM_CHECK_DEFAULT /* 3f */
+PGM_CHECK_DEFAULT /* 40 */
+PGM_CHECK_DEFAULT /* 41 */
+PGM_CHECK_DEFAULT /* 42 */
+PGM_CHECK_DEFAULT /* 43 */
+PGM_CHECK_DEFAULT /* 44 */
+PGM_CHECK_DEFAULT /* 45 */
+PGM_CHECK_DEFAULT /* 46 */
+PGM_CHECK_DEFAULT /* 47 */
+PGM_CHECK_DEFAULT /* 48 */
+PGM_CHECK_DEFAULT /* 49 */
+PGM_CHECK_DEFAULT /* 4a */
+PGM_CHECK_DEFAULT /* 4b */
+PGM_CHECK_DEFAULT /* 4c */
+PGM_CHECK_DEFAULT /* 4d */
+PGM_CHECK_DEFAULT /* 4e */
+PGM_CHECK_DEFAULT /* 4f */
+PGM_CHECK_DEFAULT /* 50 */
+PGM_CHECK_DEFAULT /* 51 */
+PGM_CHECK_DEFAULT /* 52 */
+PGM_CHECK_DEFAULT /* 53 */
+PGM_CHECK_DEFAULT /* 54 */
+PGM_CHECK_DEFAULT /* 55 */
+PGM_CHECK_DEFAULT /* 56 */
+PGM_CHECK_DEFAULT /* 57 */
+PGM_CHECK_DEFAULT /* 58 */
+PGM_CHECK_DEFAULT /* 59 */
+PGM_CHECK_DEFAULT /* 5a */
+PGM_CHECK_DEFAULT /* 5b */
+PGM_CHECK_DEFAULT /* 5c */
+PGM_CHECK_DEFAULT /* 5d */
+PGM_CHECK_DEFAULT /* 5e */
+PGM_CHECK_DEFAULT /* 5f */
+PGM_CHECK_DEFAULT /* 60 */
+PGM_CHECK_DEFAULT /* 61 */
+PGM_CHECK_DEFAULT /* 62 */
+PGM_CHECK_DEFAULT /* 63 */
+PGM_CHECK_DEFAULT /* 64 */
+PGM_CHECK_DEFAULT /* 65 */
+PGM_CHECK_DEFAULT /* 66 */
+PGM_CHECK_DEFAULT /* 67 */
+PGM_CHECK_DEFAULT /* 68 */
+PGM_CHECK_DEFAULT /* 69 */
+PGM_CHECK_DEFAULT /* 6a */
+PGM_CHECK_DEFAULT /* 6b */
+PGM_CHECK_DEFAULT /* 6c */
+PGM_CHECK_DEFAULT /* 6d */
+PGM_CHECK_DEFAULT /* 6e */
+PGM_CHECK_DEFAULT /* 6f */
+PGM_CHECK_DEFAULT /* 70 */
+PGM_CHECK_DEFAULT /* 71 */
+PGM_CHECK_DEFAULT /* 72 */
+PGM_CHECK_DEFAULT /* 73 */
+PGM_CHECK_DEFAULT /* 74 */
+PGM_CHECK_DEFAULT /* 75 */
+PGM_CHECK_DEFAULT /* 76 */
+PGM_CHECK_DEFAULT /* 77 */
+PGM_CHECK_DEFAULT /* 78 */
+PGM_CHECK_DEFAULT /* 79 */
+PGM_CHECK_DEFAULT /* 7a */
+PGM_CHECK_DEFAULT /* 7b */
+PGM_CHECK_DEFAULT /* 7c */
+PGM_CHECK_DEFAULT /* 7d */
+PGM_CHECK_DEFAULT /* 7e */
+PGM_CHECK_DEFAULT /* 7f */
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 3d2b0fa37db0..70ecfc5fe8f0 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -41,8 +41,6 @@
#include <asm/ipl.h>
#include "entry.h"
-void (*pgm_check_table[128])(struct pt_regs *regs);
-
int show_unhandled_signals = 1;
#define stack_pointer ({ void **sp; asm("la %0,0(15)" : "=&d" (sp)); sp; })
@@ -350,7 +348,7 @@ void __kprobes do_per_trap(struct pt_regs *regs)
force_sig_info(SIGTRAP, &info, current);
}
-static void default_trap_handler(struct pt_regs *regs)
+void default_trap_handler(struct pt_regs *regs)
{
if (user_mode(regs)) {
report_user_fault(regs, SIGSEGV);
@@ -360,9 +358,9 @@ static void default_trap_handler(struct pt_regs *regs)
}
#define DO_ERROR_INFO(name, signr, sicode, str) \
-static void name(struct pt_regs *regs) \
-{ \
- do_trap(regs, signr, sicode, str); \
+void name(struct pt_regs *regs) \
+{ \
+ do_trap(regs, signr, sicode, str); \
}
DO_ERROR_INFO(addressing_exception, SIGILL, ILL_ILLADR,
@@ -417,7 +415,7 @@ static inline void do_fp_trap(struct pt_regs *regs, int fpc)
do_trap(regs, SIGFPE, si_code, "floating point exception");
}
-static void __kprobes illegal_op(struct pt_regs *regs)
+void __kprobes illegal_op(struct pt_regs *regs)
{
siginfo_t info;
__u8 opcode[6];
@@ -536,7 +534,7 @@ DO_ERROR_INFO(specification_exception, SIGILL, ILL_ILLOPN,
"specification exception");
#endif
-static void data_exception(struct pt_regs *regs)
+void data_exception(struct pt_regs *regs)
{
__u16 __user *location;
int signal = 0;
@@ -611,7 +609,7 @@ static void data_exception(struct pt_regs *regs)
do_trap(regs, signal, ILL_ILLOPN, "data exception");
}
-static void space_switch_exception(struct pt_regs *regs)
+void space_switch_exception(struct pt_regs *regs)
{
/* Set user psw back to home space mode. */
if (user_mode(regs))
@@ -629,43 +627,7 @@ void __kprobes kernel_stack_overflow(struct pt_regs * regs)
panic("Corrupt kernel stack, can't continue.");
}
-/* init is done in lowcore.S and head.S */
-
void __init trap_init(void)
{
- int i;
-
- for (i = 0; i < 128; i++)
- pgm_check_table[i] = &default_trap_handler;
- pgm_check_table[1] = &illegal_op;
- pgm_check_table[2] = &privileged_op;
- pgm_check_table[3] = &execute_exception;
- pgm_check_table[4] = &do_protection_exception;
- pgm_check_table[5] = &addressing_exception;
- pgm_check_table[6] = &specification_exception;
- pgm_check_table[7] = &data_exception;
- pgm_check_table[8] = &overflow_exception;
- pgm_check_table[9] = &divide_exception;
- pgm_check_table[0x0A] = &overflow_exception;
- pgm_check_table[0x0B] = &divide_exception;
- pgm_check_table[0x0C] = &hfp_overflow_exception;
- pgm_check_table[0x0D] = &hfp_underflow_exception;
- pgm_check_table[0x0E] = &hfp_significance_exception;
- pgm_check_table[0x0F] = &hfp_divide_exception;
- pgm_check_table[0x10] = &do_dat_exception;
- pgm_check_table[0x11] = &do_dat_exception;
- pgm_check_table[0x12] = &translation_exception;
- pgm_check_table[0x13] = &special_op_exception;
-#ifdef CONFIG_64BIT
- pgm_check_table[0x18] = &transaction_exception;
- pgm_check_table[0x38] = &do_asce_exception;
- pgm_check_table[0x39] = &do_dat_exception;
- pgm_check_table[0x3A] = &do_dat_exception;
- pgm_check_table[0x3B] = &do_dat_exception;
-#endif /* CONFIG_64BIT */
- pgm_check_table[0x15] = &operand_exception;
- pgm_check_table[0x1C] = &space_switch_exception;
- pgm_check_table[0x1D] = &hfp_sqrt_exception;
- /* Enable machine checks early. */
local_mcck_enable();
}
generated by cgit (git 2.34.1) at 2025-11-03 23:48:30 +0000