#ifndef _I386_TSS_H_
#define _I386_TSS_H_
+#include <stdint.h>
+
/*
* i386 Task State Segment
*/
struct i386_tss {
- int back_link; /* segment number of previous task,
+ uint32_t back_link; /* segment number of previous task,
if nested */
- int esp0; /* initial stack pointer ... */
- int ss0; /* and segment for ring 0 */
- int esp1; /* initial stack pointer ... */
- int ss1; /* and segment for ring 1 */
- int esp2; /* initial stack pointer ... */
- int ss2; /* and segment for ring 2 */
- int cr3; /* CR3 - page table directory
+ uint32_t esp0; /* initial stack pointer ... */
+ uint32_t ss0; /* and segment for ring 0 */
+ uint32_t esp1; /* initial stack pointer ... */
+ uint32_t ss1; /* and segment for ring 1 */
+ uint32_t esp2; /* initial stack pointer ... */
+ uint32_t ss2; /* and segment for ring 2 */
+ uint32_t cr3; /* CR3 - page table directory
physical address */
- int eip;
- int eflags;
- int eax;
- int ecx;
- int edx;
- int ebx;
- int esp; /* current stack pointer */
- int ebp;
- int esi;
- int edi;
- int es;
- int cs;
- int ss; /* current stack segment */
- int ds;
- int fs;
- int gs;
- int ldt; /* local descriptor table segment */
- unsigned short trace_trap; /* trap on switch to this task */
- unsigned short io_bit_map_offset;
+ uint32_t eip;
+ uint32_t eflags;
+ uint32_t eax;
+ uint32_t ecx;
+ uint32_t edx;
+ uint32_t ebx;
+ uint32_t esp; /* current stack pointer */
+ uint32_t ebp;
+ uint32_t esi;
+ uint32_t edi;
+ uint32_t es;
+ uint32_t cs;
+ uint32_t ss; /* current stack segment */
+ uint32_t ds;
+ uint32_t fs;
+ uint32_t gs;
+ uint32_t ldt; /* local descriptor table segment */
+ uint16_t trace_trap; /* trap on switch to this task */
+ uint16_t io_bit_map_offset;
/* offset to start of IO permission
bit map */
};
+/*
+ * Temporary stack used on kernel entry via the sysenter instruction.
+ * Its top points on to the PCB save area. It must contain space for
+ * a single interrupt stack frame in case of single-stepping over the sysenter.
+ * Although this is defined as a 64-bit stack, the space is also used in
+ * 32-bit legacy mode. For 64-bit the stack is 16-byte aligned.
+ */
+struct sysenter_stack {
+ uint64_t stack[16]; /* Space for a 64-bit frame and some */
+ uint64_t top; /* Top and pointer to ISS in PCS */
+};
+
+struct x86_64_tss {
+ uint32_t reserved1;
+ uint64_t rsp0; /* stack pointer for CPL0 */
+ uint64_t rsp1; /* stack pointer for CPL1 */
+ uint64_t rsp2; /* stack pointer for CPL2 */
+ uint32_t reserved2;
+ uint32_t reserved3;
+ uint64_t ist1; /* interrupt stack table 1 */
+ uint64_t ist2; /* interrupt stack table 2 */
+ uint64_t ist3; /* interrupt stack table 3 */
+ uint64_t ist4; /* interrupt stack table 4 */
+ uint64_t ist5; /* interrupt stack table 5 */
+ uint64_t ist6; /* interrupt stack table 6 */
+ uint64_t ist7; /* interrupt stack table 7 */
+ uint32_t reserved4;
+ uint32_t reserved5;
+ uint16_t reserved6;
+ uint16_t io_bit_map_offset;
+ /* offset to IO permission bit map */
+};
#endif /* _I386_TSS_H_ */
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