diff options
Diffstat (limited to 'kernel/src/cpu/gdt.c')
| -rw-r--r-- | kernel/src/cpu/gdt.c | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/kernel/src/cpu/gdt.c b/kernel/src/cpu/gdt.c index 58db962..7460474 100644 --- a/kernel/src/cpu/gdt.c +++ b/kernel/src/cpu/gdt.c @@ -4,7 +4,8 @@ gdt_seg_entry gdt[7]; gdt_p gdt_pointer; -void add_gdt_entry(uint32_t num, uint32_t offset, uint32_t limit, uint8_t access, uint8_t flags) +void add_gdt_entry(uint32_t num, uint32_t offset, uint32_t limit, + uint8_t access, uint8_t flags) { gdt[num].offset1 = offset & 0xffff; gdt[num].offset2 = (offset >> 16) & 0xff; @@ -15,31 +16,31 @@ void add_gdt_entry(uint32_t num, uint32_t offset, uint32_t limit, uint8_t access gdt[num].limitflags = (uint8_t)(flags << 4); } -void add_gdt_tss(uint32_t num, uint64_t offset, uint32_t limit, uint8_t access, uint8_t flags) +void add_gdt_tss(uint32_t num, uint64_t offset, uint32_t limit, uint8_t access, + uint8_t flags) { uint32_t offset_low = (offset & 0xffffffff); uint32_t offset_high = (uint32_t)(offset >> 32); add_gdt_entry(num, offset_low, limit, access, flags); - gdt[num+1].limit = (offset_high & 0xffff); - gdt[num+1].offset1 = (uint16_t)(offset_high >> 16); + gdt[num + 1].limit = (offset_high & 0xffff); + gdt[num + 1].offset1 = (uint16_t)(offset_high >> 16); } void reload_gdt() { - __asm__ __volatile__ ( - // reload segment registers - "mov $0x10, %ax;" - "mov %ax, %ds;" - "mov %ax, %es;" - "mov %ax, %ss;" - "mov %ax, %fs;" - "mov %ax, %gs;" - ); + __asm__ __volatile__( + // reload segment registers + "mov $0x10, %ax;" + "mov %ax, %ds;" + "mov %ax, %es;" + "mov %ax, %ss;" + "mov %ax, %fs;" + "mov %ax, %gs;"); } -void load_gdt(gdt_p* pointer) +void load_gdt(gdt_p *pointer) { - __asm__ __volatile__ ("lgdt (%0);" : : "r"(pointer) : ); + __asm__ __volatile__("lgdt (%0);" : : "r"(pointer) :); reload_gdt(); } |