aboutsummaryrefslogtreecommitdiffstats
path: root/arch/s390/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/kernel')
-rw-r--r--arch/s390/kernel/asm-offsets.c2
-rw-r--r--arch/s390/kernel/compat_signal.c2
-rw-r--r--arch/s390/kernel/entry.S21
-rw-r--r--arch/s390/kernel/entry64.S23
-rw-r--r--arch/s390/kernel/init_task.c2
-rw-r--r--arch/s390/kernel/ptrace.c2
-rw-r--r--arch/s390/kernel/signal.c6
-rw-r--r--arch/s390/kernel/time.c13
-rw-r--r--arch/s390/kernel/vmlinux.lds.S3
9 files changed, 35 insertions, 39 deletions
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index fa28ecae636b..3d144e6020c6 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -32,7 +32,7 @@ int main(void)
DEFINE(__PT_GPRS, offsetof(struct pt_regs, gprs));
DEFINE(__PT_ORIG_GPR2, offsetof(struct pt_regs, orig_gpr2));
DEFINE(__PT_ILC, offsetof(struct pt_regs, ilc));
- DEFINE(__PT_TRAP, offsetof(struct pt_regs, trap));
+ DEFINE(__PT_SVCNR, offsetof(struct pt_regs, svcnr));
DEFINE(__PT_SIZE, sizeof(struct pt_regs));
BLANK();
DEFINE(__SF_BACKCHAIN, offsetof(struct stack_frame, back_chain));
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index c7f02e777af2..b537cb0e9b55 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -340,7 +340,7 @@ static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
return err;
restore_fp_regs(&current->thread.fp_regs);
- regs->trap = -1; /* disable syscall checks */
+ regs->svcnr = 0; /* disable syscall checks */
return 0;
}
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 08844fc24a2e..198ea18a534d 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -46,7 +46,7 @@ SP_R14 = STACK_FRAME_OVERHEAD + __PT_GPRS + 56
SP_R15 = STACK_FRAME_OVERHEAD + __PT_GPRS + 60
SP_ORIG_R2 = STACK_FRAME_OVERHEAD + __PT_ORIG_GPR2
SP_ILC = STACK_FRAME_OVERHEAD + __PT_ILC
-SP_TRAP = STACK_FRAME_OVERHEAD + __PT_TRAP
+SP_SVCNR = STACK_FRAME_OVERHEAD + __PT_SVCNR
SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE
_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
@@ -183,11 +183,10 @@ STACK_SIZE = 1 << STACK_SHIFT
.macro CREATE_STACK_FRAME psworg,savearea
s %r15,BASED(.Lc_spsize) # make room for registers & psw
mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
- la %r12,\psworg
st %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
- icm %r12,12,__LC_SVC_ILC
+ icm %r12,3,__LC_SVC_ILC
stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
- st %r12,SP_ILC(%r15)
+ st %r12,SP_SVCNR(%r15)
mvc SP_R12(16,%r15),\savearea # move %r12-%r15 to stack
la %r12,0
st %r12,__SF_BACKCHAIN(%r15) # clear back chain
@@ -264,16 +263,17 @@ sysc_update:
#endif
sysc_do_svc:
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- sla %r7,2 # *4 and test for svc 0
+ ltr %r7,%r7 # test for svc 0
bnz BASED(sysc_nr_ok) # svc number > 0
# svc 0: system call number in %r1
cl %r1,BASED(.Lnr_syscalls)
bnl BASED(sysc_nr_ok)
lr %r7,%r1 # copy svc number to %r7
- sla %r7,2 # *4
sysc_nr_ok:
mvc SP_ARGS(4,%r15),SP_R7(%r15)
sysc_do_restart:
+ sth %r7,SP_SVCNR(%r15)
+ sll %r7,2 # svc number *4
l %r8,BASED(.Lsysc_table)
tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
l %r8,0(%r7,%r8) # get system call addr.
@@ -376,7 +376,6 @@ sysc_notify_resume:
sysc_restart:
ni __TI_flags+3(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
l %r7,SP_R2(%r15) # load new svc number
- sla %r7,2
mvc SP_R2(4,%r15),SP_ORIG_R2(%r15) # restore first argument
lm %r2,%r6,SP_R2(%r15) # load svc arguments
b BASED(sysc_do_restart) # restart svc
@@ -386,7 +385,8 @@ sysc_restart:
#
sysc_singlestep:
ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
- mvi SP_TRAP+1(%r15),0x28 # set trap indication to pgm check
+ mvi SP_SVCNR(%r15),0xff # set trap indication to pgm check
+ mvi SP_SVCNR+1(%r15),0xff
la %r2,SP_PTREGS(%r15) # address of register-save area
l %r1,BASED(.Lhandle_per) # load adr. of per handler
la %r14,BASED(sysc_return) # load adr. of system return
@@ -407,7 +407,7 @@ sysc_tracesys:
bnl BASED(sysc_tracenogo)
l %r8,BASED(.Lsysc_table)
lr %r7,%r2
- sll %r7,2 # *4
+ sll %r7,2 # svc number *4
l %r8,0(%r7,%r8)
sysc_tracego:
lm %r3,%r6,SP_R3(%r15)
@@ -586,7 +586,8 @@ pgm_svcper:
# per was called from kernel, must be kprobes
#
kernel_per:
- mvi SP_TRAP+1(%r15),0x28 # set trap indication to pgm check
+ mvi SP_SVCNR(%r15),0xff # set trap indication to pgm check
+ mvi SP_SVCNR+1(%r15),0xff
la %r2,SP_PTREGS(%r15) # address of register-save area
l %r1,BASED(.Lhandle_per) # load adr. of per handler
la %r14,BASED(sysc_restore)# load adr. of system return
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 41aca06682aa..89c121ae6339 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -46,7 +46,7 @@ SP_R14 = STACK_FRAME_OVERHEAD + __PT_GPRS + 112
SP_R15 = STACK_FRAME_OVERHEAD + __PT_GPRS + 120
SP_ORIG_R2 = STACK_FRAME_OVERHEAD + __PT_ORIG_GPR2
SP_ILC = STACK_FRAME_OVERHEAD + __PT_ILC
-SP_TRAP = STACK_FRAME_OVERHEAD + __PT_TRAP
+SP_SVCNR = STACK_FRAME_OVERHEAD + __PT_SVCNR
SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE
STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
@@ -171,11 +171,10 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
.macro CREATE_STACK_FRAME psworg,savearea
aghi %r15,-SP_SIZE # make room for registers & psw
mvc SP_PSW(16,%r15),0(%r12) # move user PSW to stack
- la %r12,\psworg
stg %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
- icm %r12,12,__LC_SVC_ILC
+ icm %r12,3,__LC_SVC_ILC
stmg %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
- st %r12,SP_ILC(%r15)
+ st %r12,SP_SVCNR(%r15)
mvc SP_R12(32,%r15),\savearea # move %r12-%r15 to stack
la %r12,0
stg %r12,__SF_BACKCHAIN(%r15)
@@ -250,16 +249,17 @@ sysc_update:
#endif
sysc_do_svc:
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- slag %r7,%r7,2 # *4 and test for svc 0
+ ltgr %r7,%r7 # test for svc 0
jnz sysc_nr_ok
# svc 0: system call number in %r1
cl %r1,BASED(.Lnr_syscalls)
jnl sysc_nr_ok
lgfr %r7,%r1 # clear high word in r1
- slag %r7,%r7,2 # svc 0: system call number in %r1
sysc_nr_ok:
mvc SP_ARGS(8,%r15),SP_R7(%r15)
sysc_do_restart:
+ sth %r7,SP_SVCNR(%r15)
+ sllg %r7,%r7,2 # svc number * 4
larl %r10,sys_call_table
#ifdef CONFIG_COMPAT
tm __TI_flags+5(%r9),(_TIF_31BIT>>16) # running in 31 bit mode ?
@@ -363,7 +363,6 @@ sysc_notify_resume:
sysc_restart:
ni __TI_flags+7(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
lg %r7,SP_R2(%r15) # load new svc number
- slag %r7,%r7,2 # *4
mvc SP_R2(8,%r15),SP_ORIG_R2(%r15) # restore first argument
lmg %r2,%r6,SP_R2(%r15) # load svc arguments
j sysc_do_restart # restart svc
@@ -372,9 +371,8 @@ sysc_restart:
# _TIF_SINGLE_STEP is set, call do_single_step
#
sysc_singlestep:
- ni __TI_flags+7(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
- lhi %r0,__LC_PGM_OLD_PSW
- sth %r0,SP_TRAP(%r15) # set trap indication to pgm check
+ ni __TI_flags+7(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
+ xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
la %r2,SP_PTREGS(%r15) # address of register-save area
larl %r14,sysc_return # load adr. of system return
jg do_single_step # branch to do_sigtrap
@@ -392,7 +390,7 @@ sysc_tracesys:
lghi %r0,NR_syscalls
clgr %r0,%r2
jnh sysc_tracenogo
- slag %r7,%r2,2 # *4
+ sllg %r7,%r2,2 # svc number *4
lgf %r8,0(%r7,%r10)
sysc_tracego:
lmg %r3,%r6,SP_R3(%r15)
@@ -567,8 +565,7 @@ pgm_svcper:
# per was called from kernel, must be kprobes
#
kernel_per:
- lhi %r0,__LC_PGM_OLD_PSW
- sth %r0,SP_TRAP(%r15) # set trap indication to pgm check
+ xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
la %r2,SP_PTREGS(%r15) # address of register-save area
larl %r14,sysc_restore # load adr. of system ret, no work
jg do_single_step # branch to do_single_step
diff --git a/arch/s390/kernel/init_task.c b/arch/s390/kernel/init_task.c
index 7ad003969251..e80716843619 100644
--- a/arch/s390/kernel/init_task.c
+++ b/arch/s390/kernel/init_task.c
@@ -26,7 +26,7 @@ EXPORT_SYMBOL(init_mm);
/*
* Initial thread structure.
*
- * We need to make sure that this is 8192-byte aligned due to the
+ * We need to make sure that this is THREAD_SIZE aligned due to the
* way process stacks are handled. This is done by having a special
* "init_task" linker map entry..
*/
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 1f31be1ecc4b..38ff2bce1203 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -657,7 +657,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
* debugger stored an invalid system call number. Skip
* the system call and the system call restart handling.
*/
- regs->trap = -1;
+ regs->svcnr = 0;
ret = -1;
}
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 4f7fc3059a8e..8e6812a22670 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -160,7 +160,7 @@ static int restore_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
current->thread.fp_regs.fpc &= FPC_VALID_MASK;
restore_fp_regs(&current->thread.fp_regs);
- regs->trap = -1; /* disable syscall checks */
+ regs->svcnr = 0; /* disable syscall checks */
return 0;
}
@@ -445,7 +445,7 @@ void do_signal(struct pt_regs *regs)
oldset = &current->blocked;
/* Are we from a system call? */
- if (regs->trap == __LC_SVC_OLD_PSW) {
+ if (regs->svcnr) {
continue_addr = regs->psw.addr;
restart_addr = continue_addr - regs->ilc;
retval = regs->gprs[2];
@@ -462,7 +462,7 @@ void do_signal(struct pt_regs *regs)
case -ERESTART_RESTARTBLOCK:
regs->gprs[2] = -EINTR;
}
- regs->trap = -1; /* Don't deal with this again. */
+ regs->svcnr = 0; /* Don't deal with this again. */
}
/* Get signal to deliver. When running under ptrace, at this point
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index b94e9e3b694a..eccefbbff887 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -59,7 +59,7 @@
static ext_int_info_t ext_int_info_cc;
static ext_int_info_t ext_int_etr_cc;
-static u64 jiffies_timer_cc;
+static u64 sched_clock_base_cc;
static DEFINE_PER_CPU(struct clock_event_device, comparators);
@@ -68,7 +68,7 @@ static DEFINE_PER_CPU(struct clock_event_device, comparators);
*/
unsigned long long sched_clock(void)
{
- return ((get_clock_xt() - jiffies_timer_cc) * 125) >> 9;
+ return ((get_clock_xt() - sched_clock_base_cc) * 125) >> 9;
}
/*
@@ -229,13 +229,10 @@ static struct clocksource clocksource_tod = {
*/
void __init time_init(void)
{
- u64 init_timer_cc;
-
- init_timer_cc = reset_tod_clock();
- jiffies_timer_cc = init_timer_cc - jiffies_64 * CLK_TICKS_PER_JIFFY;
+ sched_clock_base_cc = reset_tod_clock();
/* set xtime */
- tod_to_timeval(init_timer_cc - TOD_UNIX_EPOCH, &xtime);
+ tod_to_timeval(sched_clock_base_cc - TOD_UNIX_EPOCH, &xtime);
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
@@ -289,7 +286,7 @@ static unsigned long long adjust_time(unsigned long long old,
delta = -delta;
adjust.offset = -ticks * (1000000 / HZ);
}
- jiffies_timer_cc += delta;
+ sched_clock_base_cc += delta;
if (adjust.offset != 0) {
printk(KERN_NOTICE "etr: time adjusted by %li micro-seconds\n",
adjust.offset);
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 607bd67a18ce..d796d05c9c01 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -2,6 +2,7 @@
* Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
+#include <asm/thread_info.h>
#include <asm/page.h>
#include <asm-generic/vmlinux.lds.h>
@@ -86,7 +87,7 @@ SECTIONS
}
_edata = .; /* End of data section */
- . = ALIGN(2 * PAGE_SIZE); /* init_task */
+ . = ALIGN(THREAD_SIZE); /* init_task */
.data.init_task : {
*(.data.init_task)
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.