stv0g/eduOS
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

initialize boot task's esp0 with the correct value (and not a pseudo value)

Browse source
This commit is contained in:
Stefan Lankes 2015-03-08 11:18:08 +01:00
parent b3b4862b79
commit 6e3f1171de
1 changed files with 3 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
arch/x86/kernel/gdt.c
View file

@ -47,6 +47,8 @@ static gdt_entry_t gdt[GDT_ENTRIES] = {[0 ... GDT_ENTRIES-1] = {0, 0, 0, 0, 0,
*/
extern void gdt_flush(void);
extern const void boot_stack;
void set_kernel_stack(void)
{
task_t* curr_task = current_task;
@ -136,7 +138,7 @@ void gdt_install(void)
/* set default values */
task_state_segment.eflags = 0x1202;
task_state_segment.ss0 = 0x10; // data segment
task_state_segment.esp0 = 0xDEADBEEF; // invalid pseudo address
task_state_segment.esp0 = (size_t) &boot_stack - 0x10;
task_state_segment.cs = 0x0b;
task_state_segment.ss = task_state_segment.ds = task_state_segment.es = task_state_segment.fs = task_state_segment.gs = 0x13;
gdt_set_gate(5, (unsigned long) (&task_state_segment), sizeof(tss_t)-1,