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Annotation of qemu/roms/openbios/arch/x86/context.h, revision 1.1.1.1

1.1       root        1: #ifndef i386_CONTEXT_H
                      2: #define i386_CONTEXT_H
                      3: 
                      4: struct context {
                      5:     /* Stack Segment, placed here because of the alignment issue... */
                      6:     uint16_t ss;
                      7:     /* Used with sgdt/lgdt */
                      8:     uint16_t gdt_limit;
                      9:     uint32_t gdt_base;
                     10:     /* General registers, accessed with pushal/popal */
                     11:     uint32_t edi;
                     12:     uint32_t esi;
                     13:     uint32_t ebp;
                     14:     uint32_t esp; /* points just below eax */
                     15:     uint32_t ebx;
                     16:     uint32_t edx;
                     17:     uint32_t ecx;
                     18:     uint32_t eax;
                     19: #define ESP_LOC(ctx) (&(ctx)->gs)
                     20:     /* Segment registers */
                     21:     uint32_t gs;
                     22:     uint32_t fs;
                     23:     uint32_t es;
                     24:     uint32_t ds;
                     25:     /* Flags */
                     26:     uint32_t eflags;
                     27:     /* Code segment:offset */
                     28:     uint32_t eip;
                     29:     uint32_t cs;
                     30:     /* Optional stack contents */
                     31:     uint32_t return_addr;
                     32:     uint32_t param[0];
                     33: };
                     34: 
                     35: /* Create a new context in the given stack */
                     36: struct context *
                     37: init_context(uint8_t *stack, uint32_t stack_size, int num_param);
                     38: 
                     39: /* Switch context */
                     40: struct context *switch_to(struct context *);
                     41: 
                     42: /* Holds physical address of boot context */
                     43: extern unsigned long __boot_ctx;
                     44: 
                     45: /* This can always be safely used to refer to the boot context */
                     46: #define boot_ctx ((struct context *) phys_to_virt(__boot_ctx))
                     47: 
                     48: #endif /* i386_CONTEXT_H */

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