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-rw-r--r--arch/alpha/kernel/entry.S144
1 files changed, 64 insertions, 80 deletions
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index 6f63fdb7e..ef582b80e 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -22,7 +22,7 @@
/*
* stack offsets
*/
-#define SP_OFF 160
+#define SP_OFF 184
#define SWITCH_STACK_SIZE 320
@@ -47,9 +47,11 @@
* regs 9-15 preserved by C code
* regs 16-18 saved by PAL-code
* regs 29-30 saved and set up by PAL-code
+ * JRP - Save regs 16-18 in a special area of the stack, so that
+ * the palcode-provided values are available to the signal handler.
*/
#define SAVE_ALL \
- subq $30,160,$30; \
+ subq $30,184,$30; \
stq $0,0($30); \
stq $1,8($30); \
stq $2,16($30); \
@@ -71,7 +73,10 @@
stq $26,128($30); \
stq $27,136($30); \
stq $28,144($30); \
- stq $2,152($30)
+ stq $2,152($30); \
+ stq $16,160($30); \
+ stq $17,168($30); \
+ stq $18,176($30)
#define RESTORE_ALL \
lda $19,hae; \
@@ -108,7 +113,7 @@
ldq $26,128($30); \
ldq $27,136($30); \
ldq $28,144($30); \
- addq $30,160,$30
+ addq $30,184,$30
.text
.set noat
@@ -121,19 +126,8 @@
.ent entInt
entInt:
SAVE_ALL
-/* start atomic operation with respect to software interrupts */
- lda $0,intr_count
- ldq $1,0($0)
- addq $1,1,$1
- stq $1,0($0)
-/* set up the arguments to the C interrupt handler */
- lda $27,do_entInt
- jsr $26,($27),do_entInt
-/* ok, return */
- lda $0,intr_count
- ldq $1,0($0)
- subq $1,1,$1
- stq $1,0($0)
+ ldq $8,current_set
+ jsr $26,do_entInt
br $31,ret_from_sys_call
.end entInt
@@ -153,6 +147,7 @@ entMM:
stq $15,48($30)
addq $30,56,$19
/* handle the fault */
+ ldq $8,current_set
jsr $26,do_page_fault
/* reload the registers after the exception code played. */
ldq $9,0($30)
@@ -172,6 +167,9 @@ entMM:
.ent entArith
entArith:
SAVE_ALL
+ ldq $8,current_set
+ /* How much of a win is this clockwise? We are, after all, messing
+ up the call/return prefetch stack. -- rth */
lda $27,do_entArith
lda $26,ret_from_sys_call
jsr $31,($27),do_entArith
@@ -182,6 +180,7 @@ entArith:
.ent entIF
entIF:
SAVE_ALL
+ ldq $8,current_set
lda $27,do_entIF
lda $26,ret_from_sys_call
jsr $31,($27),do_entIF
@@ -199,6 +198,8 @@ entIF:
.align 3
.ent kernel_clone
kernel_clone:
+ .frame $30, 0, $26
+ .prologue 0
subq $30,6*8,$30
stq $31,0($30)
stq $26,8($30)
@@ -208,8 +209,7 @@ kernel_clone:
stq $18,40($30)
bis $31,2,$0 /* Register v0: syscall nr for fork() */
SAVE_ALL
- lda $27,sys_clone
- jsr $26,($27),sys_clone
+ jsr $26,sys_clone
stq $0,0($30)
br $31,ret_from_sys_call
.end kernel_clone
@@ -221,26 +221,30 @@ kernel_clone:
.globl __kernel_thread
.ent __kernel_thread
__kernel_thread:
+ .frame $30, 4*8, $26
subq $30,4*8,$30
- stq $9,0($30)
- stq $10,8($30)
- stq $26,16($30)
+ stq $10,16($30)
+ stq $9,8($30)
+ stq $26,0($30)
+ .prologue 0
bis $17,$17,$9 /* save fn */
bis $18,$18,$10 /* save arg */
bsr $26,kernel_clone
bne $20,1f /* $20 is non-zero in child */
- ldq $9,0($30)
- ldq $10,8($30)
- ldq $26,16($30)
+ ldq $26,0($30)
+ ldq $9,8($30)
+ ldq $10,16($30)
addq $30,4*8,$30
ret $31,($26),1
/* this is in child: look out as we don't have any stack here.. */
1: bis $9,$9,$27 /* get fn */
+ br $29,2f
+2: ldgp $29,0($29)
bis $10,$10,$16 /* get arg */
+ ldq $8,current_set
jsr $26,($27)
bis $0,$0,$16
- lda $27,sys_exit
- jsr $26,($27),sys_exit
+ jsr $26,sys_exit
call_pal PAL_halt
.end __kernel_thread
@@ -378,8 +382,8 @@ entUna:
stq $29,232($30)
stq $30,240($30)
stq $31,248($30)
- lda $27,do_entUna
- jsr $26,($27),do_entUna
+ ldq $8,current_set
+ jsr $26,do_entUna
ldq $0,0($30)
ldq $1,8($30)
ldq $2,16($30)
@@ -427,9 +431,9 @@ entUnaUser:
stq $13,32($30)
stq $14,40($30)
stq $15,48($30)
- lda $27,do_entUnaUser
bis $31,$30,$19
- jsr $26,($27),do_entUnaUser
+ ldq $8,current_set
+ jsr $26,do_entUnaUser
ldq $9,0($30)
ldq $10,8($30)
ldq $11,16($30)
@@ -453,8 +457,7 @@ sys_fork:
bis $31,SIGCHLD,$16
bis $31,$31,$17
bis $30,$30,$18
- lda $27,alpha_clone
- jsr $26,($27),alpha_clone
+ jsr $26,alpha_clone
bsr $1,undo_switch_stack
ret $31,($26),1
.end sys_fork
@@ -466,8 +469,7 @@ sys_clone:
bsr $1,do_switch_stack
/* arg1 and arg2 come from the user */
bis $30,$30,$18
- lda $27,alpha_clone
- jsr $26,($27),alpha_clone
+ jsr $26,alpha_clone
bsr $1,undo_switch_stack
ret $31,($26),1
.end sys_clone
@@ -495,14 +497,13 @@ alpha_switch_to:
.ent entSys
entSys:
SAVE_ALL
- lda $1,current_set
+ ldq $8,current_set
lda $4,NR_SYSCALLS($31)
stq $16,SP_OFF+24($30)
lda $5,sys_call_table
- ldq $2,0($1)
lda $27,do_entSys
cmpult $0,$4,$4
- ldq $3,TASK_FLAGS($2)
+ ldq $3,TASK_FLAGS($8)
stq $17,SP_OFF+32($30)
s8addq $0,$5,$5
and $3,PF_PTRACED,$3
@@ -519,14 +520,9 @@ entSys:
ret_from_sys_call:
cmovne $26,0,$19 /* $19 = 0 => non-restartable */
/* check bottom half interrupts */
- lda $0,intr_count
- ldq $1,0($0)
bne $1,ret_from_handle_bh
- lda $2,bh_active
- ldq $3,0($2)
- lda $2,bh_mask
- ldq $4,0($2)
- addq $1,1,$1
+ ldq $3,bh_active
+ ldq $4,bh_mask
and $3,$4,$2
bne $2,handle_bottom_half
ret_from_handle_bh:
@@ -535,15 +531,13 @@ ret_from_handle_bh:
beq $0,restore_all
ret_from_reschedule:
lda $0,need_resched
- lda $1,current_set
ldl $2,0($0)
lda $4,init_task
- ldq $3,0($1)
bne $2,reschedule
- subq $4,$3,$4
+ xor $4,$8,$4
beq $4,restore_all
- ldq $4,TASK_SIGNAL($3)
- ldq $16,TASK_BLOCKED($3)
+ ldq $4,TASK_SIGNAL($8)
+ ldq $16,TASK_BLOCKED($8)
bic $4,$16,$4
bne $4,signal_return
restore_all:
@@ -556,8 +550,7 @@ restore_all:
strace:
/* set up signal stack, call syscall_trace */
bsr $1,do_switch_stack
- lda $27,syscall_trace
- jsr $26,($27),syscall_trace
+ jsr $26,syscall_trace
bsr $1,undo_switch_stack
/* get the system call number and the arguments back.. */
@@ -586,8 +579,7 @@ strace_success:
stq $0,0($30) /* save return value */
bsr $1,do_switch_stack
- lda $27,syscall_trace
- jsr $26,($27),syscall_trace
+ jsr $26,syscall_trace
bsr $1,undo_switch_stack
br $31,ret_from_sys_call
@@ -605,8 +597,7 @@ strace_error:
bsr $1,do_switch_stack
bis $19,$19,$9 /* save old syscall number */
bis $20,$20,$10 /* save old a3 */
- lda $27,syscall_trace
- jsr $26,($27),syscall_trace
+ jsr $26,syscall_trace
bis $9,$9,$19
bis $10,$10,$20
bsr $1,undo_switch_stack
@@ -616,21 +607,13 @@ strace_error:
.align 3
handle_bottom_half:
- /*
- * We're called with $0 containing the address of
- * 'intr_count' and $1 containing 'intr_count+1'
- */
- stq $1,0($0) /* intr_count = 1 */
subq $30,16,$30
stq $19,0($30) /* save syscall nr */
stq $20,8($30) /* and error indication (a3) */
- lda $27,do_bottom_half
- jsr $26,($27),do_bottom_half
- lda $0,intr_count
+ jsr $26,do_bottom_half
ldq $19,0($30)
ldq $20,8($30)
addq $30,16,$30
- stq $31,0($0) /* intr_count = 0 */
br $31,ret_from_handle_bh
.align 3
@@ -648,10 +631,14 @@ syscall_error:
ldq $20,72($30) /* .. and this a3 */
subq $31,$0,$0 /* with error in v0 */
addq $31,1,$1 /* set a3 for errno return */
- bis $31,$31,$26 /* tell "ret_from_sys_call" that we can restart */
+ stq $0,0($30)
+ bis $31,$31,$26 /* tell "ret_from_sys_call" we can restart */
stq $1,72($30) /* a3 for return */
+ br $31,ret_from_sys_call
+
ret_success:
stq $0,0($30)
+ stq $31,72($30) /* a3=0 => no error */
br $31,ret_from_sys_call
.align 3
@@ -659,8 +646,7 @@ signal_return:
bis $30,$30,$17
br $1,do_switch_stack
bis $30,$30,$18
- lda $27,do_signal
- jsr $26,($27),do_signal
+ jsr $26,do_signal
lda $30,SWITCH_STACK_SIZE($30)
br $31,restore_all
.end entSys
@@ -671,8 +657,7 @@ reschedule:
subq $30,16,$30
stq $19,0($30) /* save syscall nr */
stq $20,8($30) /* and error indication (a3) */
- lda $27,schedule
- jsr $26,($27),schedule
+ jsr $26,schedule
ldq $19,0($30)
ldq $20,8($30)
addq $30,16,$30
@@ -685,8 +670,7 @@ sys_sigreturn:
bis $30,$30,$17
lda $30,-SWITCH_STACK_SIZE($30)
bis $30,$30,$18
- lda $27,do_sigreturn
- jsr $26,($27),do_sigreturn
+ jsr $26,do_sigreturn
br $1,undo_switch_stack
br $31,ret_from_sys_call
.end sys_sigreturn
@@ -697,8 +681,7 @@ sys_sigsuspend:
bis $30,$30,$17
br $1,do_switch_stack
bis $30,$30,$18
- lda $27,do_sigsuspend
- jsr $26,($27),do_sigsuspend
+ jsr $26,do_sigsuspend
lda $30,SWITCH_STACK_SIZE($30)
br $31,ret_from_sys_call
.end sys_sigsuspend
@@ -709,12 +692,12 @@ sys_call_table:
/*0*/ .quad do_entSys, sys_exit, sys_fork, sys_read, sys_write
.quad do_entSys, sys_close, sys_wait4, do_entSys, sys_link
.quad sys_unlink, do_entSys, sys_chdir, sys_fchdir, sys_mknod
- .quad sys_chmod, sys_chown, sys_brk, do_entSys, sys_lseek
+ .quad sys_chmod, sys_chown, osf_brk, do_entSys, sys_lseek
.quad sys_getxpid, osf_mount, osf_umount, sys_setuid, sys_getxuid
.quad do_entSys, sys_ptrace, do_entSys, do_entSys, do_entSys
.quad do_entSys, do_entSys, do_entSys, sys_access, do_entSys
.quad do_entSys, sys_sync, sys_kill, do_entSys, sys_setpgid
- .quad do_entSys, sys_dup, sys_pipe, do_entSys, do_entSys
+ .quad do_entSys, sys_dup, sys_pipe, osf_set_program_attributes, do_entSys
.quad sys_open, do_entSys, sys_getxgid, osf_sigprocmask, do_entSys
/*50*/ .quad do_entSys, sys_acct, sys_sigpending, do_entSys, sys_ioctl
.quad do_entSys, do_entSys, sys_symlink, sys_readlink, sys_execve
@@ -725,7 +708,7 @@ sys_call_table:
/* map BSD's setpgrp to sys_setpgid for binary compatibility: */
.quad sys_setgroups, do_entSys, sys_setpgid, sys_setitimer, do_entSys
.quad do_entSys, sys_getitimer, sys_gethostname, sys_sethostname, sys_getdtablesize
- .quad sys_dup2, sys_newfstat, sys_fcntl, sys_select, do_entSys
+ .quad sys_dup2, sys_newfstat, sys_fcntl, sys_select, sys_poll
.quad sys_fsync, sys_setpriority, sys_socket, sys_connect, sys_accept
/*100*/ .quad osf_getpriority, sys_send, sys_recv, sys_sigreturn, sys_bind
.quad sys_setsockopt, sys_listen, do_entSys, do_entSys, do_entSys
@@ -755,7 +738,7 @@ sys_call_table:
.quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
.quad do_entSys, do_entSys, do_entSys, sys_getpgid, sys_getsid
.quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
- .quad do_entSys, do_entSys, do_entSys, do_entSys, osf_proplist_syscall
+ .quad do_entSys, osf_sysinfo, do_entSys, do_entSys, osf_proplist_syscall
.quad do_entSys, do_entSys, do_entSys, do_entSys, do_entSys
/*250*/ .quad do_entSys, osf_usleep_thread, do_entSys, do_entSys, sys_sysfs
.quad do_entSys, osf_getsysinfo, osf_setsysinfo, do_entSys, do_entSys
@@ -776,5 +759,6 @@ sys_call_table:
.quad sys_setfsuid, sys_setfsgid, sys_ustat, sys_statfs, sys_fstatfs
.quad sys_sched_setparam, sys_sched_getparam, sys_sched_setscheduler, sys_sched_getscheduler, sys_sched_yield
.quad sys_sched_get_priority_max, sys_sched_get_priority_min, sys_sched_rr_get_interval, do_entSys /* sys_afs_syscall */, sys_newuname
- .quad sys_nanosleep, sys_mremap, do_entSys, sys_setresuid, sys_getresuid
- .quad sys_pciconfig_read, sys_pciconfig_write, do_entSys, do_entSys, do_entSys
+ .quad sys_nanosleep, sys_mremap, sys_nfsservctl, sys_setresuid, sys_getresuid
+ .quad sys_pciconfig_read, sys_pciconfig_write, sys_query_module
+ .quad do_entSys, do_entSys
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 09:08:23 +0000