Commit da1cf23e authored by Michael Holzheu's avatar Michael Holzheu Committed by Martin Schwidefsky

[S390] Save prefix register for dump on panic

The dump tools expect that the saved prefix register points to the
lowcore of the dump cpu. Since we set the prefix register to 0 during
reipl/dump, we have to save the original prefix register. Before we
start the dump program, we copy the original prefix register to the
designated location in the lowcore.
Signed-off-by: default avatarMichael Holzheu <holzheu@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 58be9441
...@@ -995,6 +995,7 @@ static void do_reset_calls(void) ...@@ -995,6 +995,7 @@ static void do_reset_calls(void)
extern void reset_mcck_handler(void); extern void reset_mcck_handler(void);
extern void reset_pgm_handler(void); extern void reset_pgm_handler(void);
extern __u32 dump_prefix_page;
void s390_reset_system(void) void s390_reset_system(void)
{ {
...@@ -1005,6 +1006,9 @@ void s390_reset_system(void) ...@@ -1005,6 +1006,9 @@ void s390_reset_system(void)
/* Stack for interrupt/machine check handler */ /* Stack for interrupt/machine check handler */
lc->panic_stack = S390_lowcore.panic_stack; lc->panic_stack = S390_lowcore.panic_stack;
/* Save prefix page address for dump case */
dump_prefix_page = (unsigned long) lc;
/* Disable prefixing */ /* Disable prefixing */
set_prefix(0); set_prefix(0);
......
...@@ -16,7 +16,7 @@ do_reipl_asm: basr %r13,0 ...@@ -16,7 +16,7 @@ do_reipl_asm: basr %r13,0
stm %r0,%r15,__LC_GPREGS_SAVE_AREA stm %r0,%r15,__LC_GPREGS_SAVE_AREA
stctl %c0,%c15,__LC_CREGS_SAVE_AREA stctl %c0,%c15,__LC_CREGS_SAVE_AREA
stam %a0,%a15,__LC_AREGS_SAVE_AREA stam %a0,%a15,__LC_AREGS_SAVE_AREA
stpx __LC_PREFIX_SAVE_AREA mvc __LC_PREFIX_SAVE_AREA(4),dump_prefix_page-.Lpg0(%r13)
stckc .Lclkcmp-.Lpg0(%r13) stckc .Lclkcmp-.Lpg0(%r13)
mvc __LC_CLOCK_COMP_SAVE_AREA(8),.Lclkcmp-.Lpg0(%r13) mvc __LC_CLOCK_COMP_SAVE_AREA(8),.Lclkcmp-.Lpg0(%r13)
stpt __LC_CPU_TIMER_SAVE_AREA stpt __LC_CPU_TIMER_SAVE_AREA
...@@ -79,3 +79,7 @@ do_reipl_asm: basr %r13,0 ...@@ -79,3 +79,7 @@ do_reipl_asm: basr %r13,0
.long 0x00000000,0x00000000 .long 0x00000000,0x00000000
.long 0x00000000,0x00000000 .long 0x00000000,0x00000000
.long 0x00000000,0x00000000 .long 0x00000000,0x00000000
.globl dump_prefix_page
dump_prefix_page:
.long 0x00000000
...@@ -20,7 +20,7 @@ do_reipl_asm: basr %r13,0 ...@@ -20,7 +20,7 @@ do_reipl_asm: basr %r13,0
stg %r0,__LC_GPREGS_SAVE_AREA-0x1000+8(%r1) stg %r0,__LC_GPREGS_SAVE_AREA-0x1000+8(%r1)
stctg %c0,%c15,__LC_CREGS_SAVE_AREA-0x1000(%r1) stctg %c0,%c15,__LC_CREGS_SAVE_AREA-0x1000(%r1)
stam %a0,%a15,__LC_AREGS_SAVE_AREA-0x1000(%r1) stam %a0,%a15,__LC_AREGS_SAVE_AREA-0x1000(%r1)
stpx __LC_PREFIX_SAVE_AREA-0x1000(%r1) mvc __LC_PREFIX_SAVE_AREA-0x1000(4,%r1),dump_prefix_page-.Lpg0(%r13)
stfpc __LC_FP_CREG_SAVE_AREA-0x1000(%r1) stfpc __LC_FP_CREG_SAVE_AREA-0x1000(%r1)
stckc .Lclkcmp-.Lpg0(%r13) stckc .Lclkcmp-.Lpg0(%r13)
mvc __LC_CLOCK_COMP_SAVE_AREA-0x1000(8,%r1),.Lclkcmp-.Lpg0(%r13) mvc __LC_CLOCK_COMP_SAVE_AREA-0x1000(8,%r1),.Lclkcmp-.Lpg0(%r13)
...@@ -103,3 +103,6 @@ do_reipl_asm: basr %r13,0 ...@@ -103,3 +103,6 @@ do_reipl_asm: basr %r13,0
.long 0x00000000,0x00000000 .long 0x00000000,0x00000000
.long 0x00000000,0x00000000 .long 0x00000000,0x00000000
.long 0x00000000,0x00000000 .long 0x00000000,0x00000000
.globl dump_prefix_page
dump_prefix_page:
.long 0x00000000
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment