Return to frame.h CVS log

Up to [Apple XNU] / GNUtools / cctools / include / architecture / i386

Annotation of GNUtools/cctools/include/architecture/i386/frame.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1992 NeXT Computer, Inc.
                      3:  *
                      4:  * Intel386 Family:    Processor exception frame.
                      5:  *
                      6:  * HISTORY
                      7:  *
                      8:  * 31 August 1992 David E. Bohman at NeXT
                      9:  *     Added v86 mode stuff.
                     10:  *
                     11:  * 8 June 1992 David E. Bohman at NeXT
                     12:  *     Changed name of write field in err_code_t
                     13:  *     which collided with write() in shlib.
                     14:  *
                     15:  * 30 March 1992 David E. Bohman at NeXT
                     16:  *     Created.
                     17:  */
                     18: 
                     19: /*
                     20:  * Format of the error code
                     21:  * generated by the hardware
                     22:  * for certain exceptions.
                     23:  */
                     24:  
                     25: typedef union err_code {
                     26:     struct err_code_normal {
                     27:        unsigned int    ext     :1,
                     28:                        tbl     :2,
                     29: #define ERR_GDT                0
                     30: #define ERR_IDT                1
                     31: #define ERR_LDT                2
                     32:                        index   :13,
                     33:                                :16;
                     34:     } normal;
                     35:     struct err_code_pgfault {
                     36:        unsigned int    prot    :1,
                     37:                        wrtflt  :1,
                     38:                        user    :1,
                     39:                                :29;
                     40:     } pgfault;
                     41: } err_code_t;
                     42: 
                     43: #import <architecture/i386/sel.h>
                     44: 
                     45: /*
                     46:  * The actual hardware exception frame
                     47:  * is variable in size.  An error code is
                     48:  * only pushed for certain exceptions.
                     49:  * Previous stack information is only
                     50:  * pushed for exceptions that cause a
                     51:  * change in privilege level.  The dpl
                     52:  * field of the saved CS selector can be
                     53:  * used to determine whether this is the
                     54:  * case.  If the interrupted task was
                     55:  * executing in v86 mode, then the data
                     56:  * segment registers are also present in
                     57:  * the exception frame (in addition to
                     58:  * previous stack information).  This
                     59:  * case can be determined by examining
                     60:  * eflags.
                     61:  */
                     62: 
                     63: typedef struct except_frame {
                     64:     err_code_t         err;
                     65:     unsigned int       eip;
                     66:     sel_t              cs;
                     67:     unsigned int               :0;
                     68:     unsigned int       eflags;
                     69:     unsigned int       esp;
                     70:     sel_t              ss;
                     71:     unsigned int               :0;
                     72:     unsigned short     v_es;
                     73:     unsigned int               :0;
                     74:     unsigned short     v_ds;
                     75:     unsigned int               :0;
                     76:     unsigned short     v_fs;
                     77:     unsigned int               :0;
                     78:     unsigned short     v_gs;
                     79:     unsigned int               :0;
                     80: } except_frame_t;
                     81: 
                     82: /*
                     83:  * Values in eflags.
                     84:  */
                     85: 
                     86: #define EFL_CF         0x00001
                     87: #define EFL_PF         0x00004
                     88: #define EFL_AF         0x00010
                     89: #define EFL_ZF         0x00040
                     90: #define EFL_SF         0x00080
                     91: #define EFL_TF         0x00100
                     92: #define EFL_IF         0x00200
                     93: #define EFL_DF         0x00400
                     94: #define EFL_OF         0x00800
                     95: #define EFL_IOPL       0x03000
                     96: #define EFL_NT         0x04000
                     97: #define EFL_RF         0x10000
                     98: #define EFL_VM         0x20000
                     99: #define EFL_AC         0x40000
                    100: 
                    101: #define EFL_CLR                0xfff88028
                    102: #define EFL_SET                0x00000002

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.