diff options
Diffstat (limited to 'serverboot/exec.c')
| -rw-r--r-- | serverboot/exec.c | 73 |
1 files changed, 66 insertions, 7 deletions
diff --git a/serverboot/exec.c b/serverboot/exec.c index a0773f4c..a487fb5d 100644 --- a/serverboot/exec.c +++ b/serverboot/exec.c @@ -1,25 +1,25 @@ -/* +/* * Mach Operating System * Copyright (c) 1993-1989 Carnegie Mellon University * All Rights Reserved. - * + * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. - * + * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * + * * Carnegie Mellon requests users of this software to return to - * + * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 - * + * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ @@ -29,11 +29,14 @@ #include <mach.h> #include <mach/machine/vm_param.h> -#include <mach/machine/eflags.h> #include "mach-exec.h" #include <file_io.h> +#ifdef i386 + +#include <mach/machine/eflags.h> + /* * Machine-dependent portions of execve() for the i386. */ @@ -86,3 +89,59 @@ char *set_regs( return (char *)regs.uesp; } +#elif defined __alpha__ + + +/* + * Object: + * set_regs EXPORTED function + * + * Initialize enough state for a thread to run, including + * stack memory and stack pointer, and program counter. + * + */ +#define STACK_SIZE (vm_size_t)(128*1024) + +char *set_regs( + mach_port_t user_task, + mach_port_t user_thread, + struct exec_info *info, + int arg_size) +{ + vm_offset_t stack_start; + vm_offset_t stack_end; + struct alpha_thread_state regs; + + natural_t reg_size; + + /* + * Allocate stack. + */ + stack_end = VM_MAX_ADDRESS; + stack_start = stack_end - STACK_SIZE; + (void)vm_allocate(user_task, + &stack_start, + (vm_size_t)(STACK_SIZE), + FALSE); + + reg_size = ALPHA_THREAD_STATE_COUNT; + (void)thread_get_state(user_thread, + ALPHA_THREAD_STATE, + (thread_state_t)®s, + ®_size); + + regs.pc = info->entry; + regs.r29 = info->init_dp; + regs.r30 = (integer_t)((stack_end - arg_size) & ~(sizeof(integer_t)-1)); + + (void)thread_set_state(user_thread, + ALPHA_THREAD_STATE, + (thread_state_t)®s, + reg_size); + + return (char *)regs.r30; +} + +#else +# error "Not ported to this architecture!" +#endif |