a73b93157f
It encourages users from writing to the FSF without giving an address. Linux also prefers to drop that and their checkpatch.pl (that we imported) looks out for that. This is the result of util/scripts/no-fsf-addresses.sh with no further editing. Change-Id: Ie96faea295fe001911d77dbc51e9a6789558fbd6 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Reviewed-on: http://review.coreboot.org/11888 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/*
|
|
* This file is part of the coreboot project.
|
|
*
|
|
* Copyright (C) 2013 Google, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <thread.h>
|
|
|
|
/* The stack frame looks like the following after a pushad instruction. */
|
|
struct pushad_regs {
|
|
uint32_t edi; /* Offset 0x00 */
|
|
uint32_t esi; /* Offset 0x04 */
|
|
uint32_t ebp; /* Offset 0x08 */
|
|
uint32_t esp; /* Offset 0x0c */
|
|
uint32_t ebx; /* Offset 0x10 */
|
|
uint32_t edx; /* Offset 0x14 */
|
|
uint32_t ecx; /* Offset 0x18 */
|
|
uint32_t eax; /* Offset 0x1c */
|
|
};
|
|
|
|
static inline uintptr_t push_stack(uintptr_t cur_stack, uintptr_t value)
|
|
{
|
|
uintptr_t *addr;
|
|
|
|
cur_stack -= sizeof(value);
|
|
addr = (uintptr_t *)cur_stack;
|
|
*addr = value;
|
|
return cur_stack;
|
|
}
|
|
|
|
void arch_prepare_thread(struct thread *t,
|
|
void asmlinkage (*thread_entry)(void *), void *arg)
|
|
{
|
|
uintptr_t stack = t->stack_current;
|
|
|
|
/* Imitate thread_entry(t) with return address of 0. thread_entry()
|
|
* is assumed to never return. */
|
|
stack = push_stack(stack, (uintptr_t)arg);
|
|
stack = push_stack(stack, (uintptr_t)0);
|
|
stack = push_stack(stack, (uintptr_t)thread_entry);
|
|
/* Make room for the registers. Ignore intial values. */
|
|
stack -= sizeof(struct pushad_regs);
|
|
|
|
t->stack_current = stack;
|
|
}
|
|
|
|
void *arch_get_thread_stackbase(void)
|
|
{
|
|
/* defined in c_start.S */
|
|
extern u8 thread_stacks[];
|
|
return &thread_stacks[0];
|
|
}
|