diff options
Diffstat (limited to 'arch/alpha/kernel/entry.S')
| -rw-r--r-- | arch/alpha/kernel/entry.S | 69 |
1 files changed, 18 insertions, 51 deletions
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S index ec0da0567ab5..7e43e1156d10 100644 --- a/arch/alpha/kernel/entry.S +++ b/arch/alpha/kernel/entry.S @@ -609,59 +609,35 @@ ret_from_fork: .end ret_from_fork /* - * kernel_thread(fn, arg, clone_flags) + * ... and new kernel threads - here */ .align 4 - .globl kernel_thread - .ent kernel_thread -kernel_thread: - /* We can be called from a module. */ - ldgp $gp, 0($27) - .prologue 1 - subq $sp, SP_OFF+6*8, $sp - br $1, 2f /* load start address */ - - /* We've now "returned" from a fake system call. */ - unop - blt $0, 1f /* error? */ - ldi $1, 0x3fff - beq $20, 1f /* parent or child? */ - - bic $sp, $1, $8 /* in child. */ - jsr $26, ($27) + .globl ret_from_kernel_thread + .ent ret_from_kernel_thread +ret_from_kernel_thread: + mov $17, $16 + jsr $26, schedule_tail + mov $9, $27 + mov $10, $16 + jsr $26, ($9) ldgp $gp, 0($26) mov $0, $16 mov $31, $26 jmp $31, sys_exit +.end ret_from_kernel_thread -1: ret /* in parent. */ - - .align 4 -2: /* Fake a system call stack frame, as we can't do system calls - from kernel space. Note that we store FN and ARG as they - need to be set up in the child for the call. Also store $8 - and $26 for use in the parent. */ - stq $31, SP_OFF($sp) /* ps */ - stq $1, SP_OFF+8($sp) /* pc */ - stq $gp, SP_OFF+16($sp) /* gp */ - stq $16, 136($sp) /* $27; FN for child */ - stq $17, SP_OFF+24($sp) /* $16; ARG for child */ - stq $8, 64($sp) /* $8 */ - stq $26, 128($sp) /* $26 */ + .globl ret_from_kernel_execve + .align 4 + .ent ret_from_kernel_execve +ret_from_kernel_execve: + mov $16, $sp /* Avoid the HAE being gratuitously wrong, to avoid restoring it. */ ldq $2, alpha_mv+HAE_CACHE stq $2, 152($sp) /* HAE */ + mov $31, $19 /* to disable syscall restarts */ + br $31, ret_to_user - /* Shuffle FLAGS to the front; add CLONE_VM. */ - ldi $1, CLONE_VM|CLONE_UNTRACED - or $18, $1, $16 - bsr $26, sys_clone - - /* We don't actually care for a3 success widgetry in the kernel. - Not for positive errno values. */ - stq $0, 0($sp) /* $0 */ - br ret_to_kernel -.end kernel_thread +.end ret_from_kernel_execve /* @@ -745,15 +721,6 @@ sys_rt_sigreturn: .end sys_rt_sigreturn .align 4 - .globl sys_execve - .ent sys_execve -sys_execve: - .prologue 0 - mov $sp, $19 - jmp $31, do_sys_execve -.end sys_execve - - .align 4 .globl alpha_ni_syscall .ent alpha_ni_syscall alpha_ni_syscall: |