Move userland bits (and some common kernel bits) from amd64 and i386
segments.h to a new x86 segments.h. Add __packed attribute to some structs (just to be sure). Also make it clear that i386 GDT and LDT entries are used in ia64 code.
This commit is contained in:
Tijl Coosemans
parent
02ed02af7b
commit
bcde3b9f67
@ -41,45 +41,7 @@
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* AMD64 Segmentation Data Structures and definitions
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*/
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/*
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* Selectors
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*/
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#define SEL_RPL_MASK 3 /* requester priv level */
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#define ISPL(s) ((s)&3) /* what is the priority level of a selector */
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#define SEL_KPL 0 /* kernel priority level */
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#define SEL_UPL 3 /* user priority level */
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#define ISLDT(s) ((s)&SEL_LDT) /* is it local or global */
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#define SEL_LDT 4 /* local descriptor table */
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#define IDXSEL(s) (((s)>>3) & 0x1fff) /* index of selector */
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#define LSEL(s,r) (((s)<<3) | SEL_LDT | r) /* a local selector */
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#define GSEL(s,r) (((s)<<3) | r) /* a global selector */
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/*
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* User segment descriptors (%cs, %ds etc for compatability apps. 64 bit wide)
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* For long-mode apps, %cs only has the conforming bit in sd_type, the sd_dpl,
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* sd_p, sd_l and sd_def32 which must be zero). %ds only has sd_p.
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*/
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struct user_segment_descriptor {
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u_int64_t sd_lolimit:16; /* segment extent (lsb) */
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u_int64_t sd_lobase:24; /* segment base address (lsb) */
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u_int64_t sd_type:5; /* segment type */
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u_int64_t sd_dpl:2; /* segment descriptor priority level */
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u_int64_t sd_p:1; /* segment descriptor present */
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u_int64_t sd_hilimit:4; /* segment extent (msb) */
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u_int64_t sd_xx:1; /* unused */
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u_int64_t sd_long:1; /* long mode (cs only) */
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u_int64_t sd_def32:1; /* default 32 vs 16 bit size */
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u_int64_t sd_gran:1; /* limit granularity (byte/page units)*/
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u_int64_t sd_hibase:8; /* segment base address (msb) */
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} __packed;
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#define USD_GETBASE(sd) (((sd)->sd_lobase) | (sd)->sd_hibase << 24)
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#define USD_SETBASE(sd, b) (sd)->sd_lobase = (b); \
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(sd)->sd_hibase = ((b) >> 24);
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#define USD_GETLIMIT(sd) (((sd)->sd_lolimit) | (sd)->sd_hilimit << 16)
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#define USD_SETLIMIT(sd, l) (sd)->sd_lolimit = (l); \
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(sd)->sd_hilimit = ((l) >> 16);
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#include <x86/segments.h>
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/*
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* System segment descriptors (128 bit wide)
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@ -99,66 +61,6 @@ struct system_segment_descriptor {
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u_int64_t sd_xx2:19;
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} __packed;
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/*
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* Gate descriptors (e.g. indirect descriptors, trap, interrupt etc. 128 bit)
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* Only interrupt and trap gates have gd_ist.
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*/
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struct gate_descriptor {
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u_int64_t gd_looffset:16; /* gate offset (lsb) */
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u_int64_t gd_selector:16; /* gate segment selector */
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u_int64_t gd_ist:3; /* IST table index */
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u_int64_t gd_xx:5; /* unused */
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u_int64_t gd_type:5; /* segment type */
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u_int64_t gd_dpl:2; /* segment descriptor priority level */
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u_int64_t gd_p:1; /* segment descriptor present */
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u_int64_t gd_hioffset:48 __packed; /* gate offset (msb) */
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u_int64_t sd_xx1:32;
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} __packed;
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/*
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* Generic descriptor
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*/
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union descriptor {
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struct user_segment_descriptor sd;
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struct gate_descriptor gd;
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};
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/* system segments and gate types */
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#define SDT_SYSNULL 0 /* system null */
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#define SDT_SYS286TSS 1 /* system 286 TSS available */
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#define SDT_SYSLDT 2 /* system 64 bit local descriptor table */
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#define SDT_SYS286BSY 3 /* system 286 TSS busy */
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#define SDT_SYS286CGT 4 /* system 286 call gate */
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#define SDT_SYSTASKGT 5 /* system task gate */
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#define SDT_SYS286IGT 6 /* system 286 interrupt gate */
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#define SDT_SYS286TGT 7 /* system 286 trap gate */
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#define SDT_SYSNULL2 8 /* system null again */
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#define SDT_SYSTSS 9 /* system available 64 bit TSS */
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#define SDT_SYSNULL3 10 /* system null again */
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#define SDT_SYSBSY 11 /* system busy 64 bit TSS */
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#define SDT_SYSCGT 12 /* system 64 bit call gate */
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#define SDT_SYSNULL4 13 /* system null again */
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#define SDT_SYSIGT 14 /* system 64 bit interrupt gate */
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#define SDT_SYSTGT 15 /* system 64 bit trap gate */
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/* memory segment types */
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#define SDT_MEMRO 16 /* memory read only */
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#define SDT_MEMROA 17 /* memory read only accessed */
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#define SDT_MEMRW 18 /* memory read write */
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#define SDT_MEMRWA 19 /* memory read write accessed */
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#define SDT_MEMROD 20 /* memory read only expand dwn limit */
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#define SDT_MEMRODA 21 /* memory read only expand dwn limit accessed */
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#define SDT_MEMRWD 22 /* memory read write expand dwn limit */
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#define SDT_MEMRWDA 23 /* memory read write expand dwn limit accessed */
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#define SDT_MEME 24 /* memory execute only */
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#define SDT_MEMEA 25 /* memory execute only accessed */
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#define SDT_MEMER 26 /* memory execute read */
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#define SDT_MEMERA 27 /* memory execute read accessed */
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#define SDT_MEMEC 28 /* memory execute only conforming */
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#define SDT_MEMEAC 29 /* memory execute only accessed conforming */
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#define SDT_MEMERC 30 /* memory execute read conforming */
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#define SDT_MEMERAC 31 /* memory execute read accessed conforming */
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/*
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* Software definitions are in this convenient format,
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* which are translated into inconvenient segment descriptors
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@ -184,56 +86,6 @@ struct region_descriptor {
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unsigned long rd_base:64 __packed; /* base address */
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} __packed;
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/*
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* Size of IDT table
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*/
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#define NIDT 256 /* 32 reserved, 16 h/w, 0 s/w, linux's 0x80 */
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#define NRSVIDT 32 /* reserved entries for cpu exceptions */
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/*
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* Entries in the Interrupt Descriptor Table (IDT)
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*/
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#define IDT_DE 0 /* #DE: Divide Error */
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#define IDT_DB 1 /* #DB: Debug */
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#define IDT_NMI 2 /* Nonmaskable External Interrupt */
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#define IDT_BP 3 /* #BP: Breakpoint */
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#define IDT_OF 4 /* #OF: Overflow */
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#define IDT_BR 5 /* #BR: Bound Range Exceeded */
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#define IDT_UD 6 /* #UD: Undefined/Invalid Opcode */
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#define IDT_NM 7 /* #NM: No Math Coprocessor */
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#define IDT_DF 8 /* #DF: Double Fault */
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#define IDT_FPUGP 9 /* Coprocessor Segment Overrun */
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#define IDT_TS 10 /* #TS: Invalid TSS */
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#define IDT_NP 11 /* #NP: Segment Not Present */
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#define IDT_SS 12 /* #SS: Stack Segment Fault */
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#define IDT_GP 13 /* #GP: General Protection Fault */
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#define IDT_PF 14 /* #PF: Page Fault */
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#define IDT_MF 16 /* #MF: FPU Floating-Point Error */
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#define IDT_AC 17 /* #AC: Alignment Check */
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#define IDT_MC 18 /* #MC: Machine Check */
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#define IDT_XF 19 /* #XF: SIMD Floating-Point Exception */
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#define IDT_IO_INTS NRSVIDT /* Base of IDT entries for I/O interrupts. */
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#define IDT_DTRACE_RET 0x20 /* DTrace pid provider Interrupt Vector */
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#define IDT_SYSCALL 0x80 /* System Call Interrupt Vector */
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/*
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* Entries in the Global Descriptor Table (GDT)
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*/
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#define GNULL_SEL 0 /* Null Descriptor */
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#define GNULL2_SEL 1 /* Null Descriptor */
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#define GUFS32_SEL 2 /* User 32 bit %fs Descriptor */
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#define GUGS32_SEL 3 /* User 32 bit %gs Descriptor */
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#define GCODE_SEL 4 /* Kernel Code Descriptor */
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#define GDATA_SEL 5 /* Kernel Data Descriptor */
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#define GUCODE32_SEL 6 /* User 32 bit code Descriptor */
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#define GUDATA_SEL 7 /* User 32/64 bit Data Descriptor */
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#define GUCODE_SEL 8 /* User 64 bit Code Descriptor */
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#define GPROC0_SEL 9 /* TSS for entering kernel etc */
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/* slot 10 is second half of GPROC0_SEL */
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#define GUSERLDT_SEL 11 /* LDT */
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/* slot 11 is second half of GUSERLDT_SEL */
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#define NGDT 13
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#ifdef _KERNEL
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extern struct user_segment_descriptor gdt[];
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extern struct soft_segment_descriptor gdt_segs[];
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@ -249,7 +101,6 @@ void ssdtosyssd(struct soft_segment_descriptor *ssdp,
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struct system_segment_descriptor *sdp);
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void update_gdt_gsbase(struct thread *td, uint32_t base);
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void update_gdt_fsbase(struct thread *td, uint32_t base);
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#endif /* _KERNEL */
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#endif /* !_MACHINE_SEGMENTS_H_ */
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@ -42,103 +42,7 @@
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* William F. Jolitz (william@ernie.berkeley.edu) 6/20/1989
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*/
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/*
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* Selectors
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*/
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#define ISPL(s) ((s)&3) /* what is the priority level of a selector */
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#ifdef XEN
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#define SEL_KPL 1 /* kernel priority level */
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#else
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#define SEL_KPL 0 /* kernel priority level */
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#endif
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#define SEL_UPL 3 /* user priority level */
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#define ISLDT(s) ((s)&SEL_LDT) /* is it local or global */
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#define SEL_LDT 4 /* local descriptor table */
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#define IDXSEL(s) (((s)>>3) & 0x1fff) /* index of selector */
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#define LSEL(s,r) (((s)<<3) | SEL_LDT | r) /* a local selector */
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#define GSEL(s,r) (((s)<<3) | r) /* a global selector */
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/*
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* Memory and System segment descriptors
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*/
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struct segment_descriptor {
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unsigned sd_lolimit:16 ; /* segment extent (lsb) */
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unsigned sd_lobase:24 __packed; /* segment base address (lsb) */
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unsigned sd_type:5 ; /* segment type */
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unsigned sd_dpl:2 ; /* segment descriptor priority level */
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unsigned sd_p:1 ; /* segment descriptor present */
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unsigned sd_hilimit:4 ; /* segment extent (msb) */
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unsigned sd_xx:2 ; /* unused */
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unsigned sd_def32:1 ; /* default 32 vs 16 bit size */
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unsigned sd_gran:1 ; /* limit granularity (byte/page units)*/
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unsigned sd_hibase:8 ; /* segment base address (msb) */
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} ;
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#define USD_GETBASE(sd) (((sd)->sd_lobase) | (sd)->sd_hibase << 24)
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#define USD_SETBASE(sd, b) (sd)->sd_lobase = (b); \
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(sd)->sd_hibase = ((b) >> 24);
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#define USD_GETLIMIT(sd) (((sd)->sd_lolimit) | (sd)->sd_hilimit << 16)
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#define USD_SETLIMIT(sd, l) (sd)->sd_lolimit = (l); \
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(sd)->sd_hilimit = ((l) >> 16);
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/*
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* Gate descriptors (e.g. indirect descriptors)
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*/
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struct gate_descriptor {
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unsigned gd_looffset:16 ; /* gate offset (lsb) */
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unsigned gd_selector:16 ; /* gate segment selector */
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unsigned gd_stkcpy:5 ; /* number of stack wds to cpy */
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unsigned gd_xx:3 ; /* unused */
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unsigned gd_type:5 ; /* segment type */
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unsigned gd_dpl:2 ; /* segment descriptor priority level */
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unsigned gd_p:1 ; /* segment descriptor present */
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unsigned gd_hioffset:16 ; /* gate offset (msb) */
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} ;
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/*
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* Generic descriptor
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*/
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union descriptor {
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struct segment_descriptor sd;
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struct gate_descriptor gd;
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};
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/* system segments and gate types */
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#define SDT_SYSNULL 0 /* system null */
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#define SDT_SYS286TSS 1 /* system 286 TSS available */
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#define SDT_SYSLDT 2 /* system local descriptor table */
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#define SDT_SYS286BSY 3 /* system 286 TSS busy */
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#define SDT_SYS286CGT 4 /* system 286 call gate */
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#define SDT_SYSTASKGT 5 /* system task gate */
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#define SDT_SYS286IGT 6 /* system 286 interrupt gate */
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#define SDT_SYS286TGT 7 /* system 286 trap gate */
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#define SDT_SYSNULL2 8 /* system null again */
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#define SDT_SYS386TSS 9 /* system 386 TSS available */
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#define SDT_SYSNULL3 10 /* system null again */
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#define SDT_SYS386BSY 11 /* system 386 TSS busy */
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#define SDT_SYS386CGT 12 /* system 386 call gate */
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#define SDT_SYSNULL4 13 /* system null again */
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#define SDT_SYS386IGT 14 /* system 386 interrupt gate */
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#define SDT_SYS386TGT 15 /* system 386 trap gate */
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/* memory segment types */
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#define SDT_MEMRO 16 /* memory read only */
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#define SDT_MEMROA 17 /* memory read only accessed */
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#define SDT_MEMRW 18 /* memory read write */
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#define SDT_MEMRWA 19 /* memory read write accessed */
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#define SDT_MEMROD 20 /* memory read only expand dwn limit */
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#define SDT_MEMRODA 21 /* memory read only expand dwn limit accessed */
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#define SDT_MEMRWD 22 /* memory read write expand dwn limit */
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#define SDT_MEMRWDA 23 /* memory read write expand dwn limit accessed */
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#define SDT_MEME 24 /* memory execute only */
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#define SDT_MEMEA 25 /* memory execute only accessed */
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#define SDT_MEMER 26 /* memory execute read */
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#define SDT_MEMERA 27 /* memory execute read accessed */
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#define SDT_MEMEC 28 /* memory execute only conforming */
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#define SDT_MEMEAC 29 /* memory execute only accessed conforming */
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#define SDT_MEMERC 30 /* memory execute read conforming */
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#define SDT_MEMERAC 31 /* memory execute read accessed conforming */
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#include <x86/segments.h>
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/*
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* Software definitions are in this convenient format,
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@ -176,84 +80,6 @@ struct region_descriptor {
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/* other bits are affected descriptor index */
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#define SEGEX_IDX(s) (((s)>>3)&0x1fff)
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/*
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* Size of IDT table
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*/
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#define NIDT 256 /* 32 reserved, 0x80 syscall, most are h/w */
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#define NRSVIDT 32 /* reserved entries for cpu exceptions */
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/*
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* Entries in the Interrupt Descriptor Table (IDT)
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*/
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#define IDT_DE 0 /* #DE: Divide Error */
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#define IDT_DB 1 /* #DB: Debug */
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#define IDT_NMI 2 /* Nonmaskable External Interrupt */
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#define IDT_BP 3 /* #BP: Breakpoint */
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#define IDT_OF 4 /* #OF: Overflow */
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#define IDT_BR 5 /* #BR: Bound Range Exceeded */
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#define IDT_UD 6 /* #UD: Undefined/Invalid Opcode */
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#define IDT_NM 7 /* #NM: No Math Coprocessor */
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#define IDT_DF 8 /* #DF: Double Fault */
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#define IDT_FPUGP 9 /* Coprocessor Segment Overrun */
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#define IDT_TS 10 /* #TS: Invalid TSS */
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#define IDT_NP 11 /* #NP: Segment Not Present */
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#define IDT_SS 12 /* #SS: Stack Segment Fault */
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#define IDT_GP 13 /* #GP: General Protection Fault */
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#define IDT_PF 14 /* #PF: Page Fault */
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#define IDT_MF 16 /* #MF: FPU Floating-Point Error */
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#define IDT_AC 17 /* #AC: Alignment Check */
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#define IDT_MC 18 /* #MC: Machine Check */
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#define IDT_XF 19 /* #XF: SIMD Floating-Point Exception */
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#define IDT_IO_INTS NRSVIDT /* Base of IDT entries for I/O interrupts. */
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#define IDT_DTRACE_RET 0x20 /* DTrace pid provider Interrupt Vector */
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#define IDT_SYSCALL 0x80 /* System Call Interrupt Vector */
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/*
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* Entries in the Global Descriptor Table (GDT)
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* Note that each 4 entries share a single 32 byte L1 cache line.
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* Some of the fast syscall instructions require a specific order here.
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*/
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#define GNULL_SEL 0 /* Null Descriptor */
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#define GPRIV_SEL 1 /* SMP Per-Processor Private Data */
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#define GUFS_SEL 2 /* User %fs Descriptor (order critical: 1) */
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#define GUGS_SEL 3 /* User %gs Descriptor (order critical: 2) */
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#define GCODE_SEL 4 /* Kernel Code Descriptor (order critical: 1) */
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#define GDATA_SEL 5 /* Kernel Data Descriptor (order critical: 2) */
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#define GUCODE_SEL 6 /* User Code Descriptor (order critical: 3) */
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#define GUDATA_SEL 7 /* User Data Descriptor (order critical: 4) */
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#define GBIOSLOWMEM_SEL 8 /* BIOS low memory access (must be entry 8) */
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#define GPROC0_SEL 9 /* Task state process slot zero and up */
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#define GLDT_SEL 10 /* Default User LDT */
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#define GUSERLDT_SEL 11 /* User LDT */
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#define GPANIC_SEL 12 /* Task state to consider panic from */
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#define GBIOSCODE32_SEL 13 /* BIOS interface (32bit Code) */
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#define GBIOSCODE16_SEL 14 /* BIOS interface (16bit Code) */
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#define GBIOSDATA_SEL 15 /* BIOS interface (Data) */
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#define GBIOSUTIL_SEL 16 /* BIOS interface (Utility) */
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#define GBIOSARGS_SEL 17 /* BIOS interface (Arguments) */
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#define GNDIS_SEL 18 /* For the NDIS layer */
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#ifdef XEN
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#define NGDT 9
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#else
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#define NGDT 19
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#endif
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/*
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* Entries in the Local Descriptor Table (LDT)
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*/
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#define LSYS5CALLS_SEL 0 /* forced by intel BCS */
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#define LSYS5SIGR_SEL 1
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#define L43BSDCALLS_SEL 2 /* notyet */
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#define LUCODE_SEL 3
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#define LSOL26CALLS_SEL 4 /* Solaris >= 2.6 system call gate */
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#define LUDATA_SEL 5
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/* separate stack, es,fs,gs sels ? */
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/* #define LPOSIXCALLS_SEL 5*/ /* notyet */
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#define LBSDICALLS_SEL 16 /* BSDI system call gate */
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#define NLDT (LBSDICALLS_SEL + 1)
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#ifdef _KERNEL
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extern int _default_ldt;
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#ifdef XEN
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@ -73,7 +73,7 @@ __FBSDID("$FreeBSD$");
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#include <compat/freebsd32/freebsd32_proto.h>
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#include <compat/ia32/ia32_signal.h>
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#include <i386/include/psl.h>
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#include <i386/include/segments.h>
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#include <x86/include/segments.h>
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#include <i386/include/specialreg.h>
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char ia32_sigcode[] = {
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286
sys/x86/include/segments.h
Normal file
286
sys/x86/include/segments.h
Normal file
@ -0,0 +1,286 @@
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/*-
|
||||
* Copyright (c) 1989, 1990 William F. Jolitz
|
||||
* Copyright (c) 1990 The Regents of the University of California.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to Berkeley by
|
||||
* William Jolitz.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 4. Neither the name of the University nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* from: @(#)segments.h 7.1 (Berkeley) 5/9/91
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef _X86_SEGMENTS_H_
|
||||
#define _X86_SEGMENTS_H_
|
||||
|
||||
/*
|
||||
* X86 Segmentation Data Structures and definitions
|
||||
*/
|
||||
|
||||
/*
|
||||
* Selectors
|
||||
*/
|
||||
#define SEL_RPL_MASK 3 /* requester priv level */
|
||||
#define ISPL(s) ((s)&3) /* priority level of a selector */
|
||||
#ifdef XEN
|
||||
#define SEL_KPL 1 /* kernel priority level */
|
||||
#else
|
||||
#define SEL_KPL 0 /* kernel priority level */
|
||||
#endif
|
||||
#define SEL_UPL 3 /* user priority level */
|
||||
#define ISLDT(s) ((s)&SEL_LDT) /* is it local or global */
|
||||
#define SEL_LDT 4 /* local descriptor table */
|
||||
#define IDXSEL(s) (((s)>>3) & 0x1fff) /* index of selector */
|
||||
#define LSEL(s,r) (((s)<<3) | SEL_LDT | r) /* a local selector */
|
||||
#define GSEL(s,r) (((s)<<3) | r) /* a global selector */
|
||||
|
||||
/*
|
||||
* User segment descriptors (%cs, %ds etc for i386 apps. 64 bit wide)
|
||||
* For long-mode apps, %cs only has the conforming bit in sd_type, the sd_dpl,
|
||||
* sd_p, sd_l and sd_def32 which must be zero). %ds only has sd_p.
|
||||
*/
|
||||
struct segment_descriptor {
|
||||
unsigned sd_lolimit:16; /* segment extent (lsb) */
|
||||
unsigned sd_lobase:24; /* segment base address (lsb) */
|
||||
unsigned sd_type:5; /* segment type */
|
||||
unsigned sd_dpl:2; /* segment descriptor priority level */
|
||||
unsigned sd_p:1; /* segment descriptor present */
|
||||
unsigned sd_hilimit:4; /* segment extent (msb) */
|
||||
unsigned sd_xx:2; /* unused */
|
||||
unsigned sd_def32:1; /* default 32 vs 16 bit size */
|
||||
unsigned sd_gran:1; /* limit granularity (byte/page units)*/
|
||||
unsigned sd_hibase:8; /* segment base address (msb) */
|
||||
} __packed;
|
||||
|
||||
struct user_segment_descriptor {
|
||||
unsigned sd_lolimit:16; /* segment extent (lsb) */
|
||||
unsigned sd_lobase:24; /* segment base address (lsb) */
|
||||
unsigned sd_type:5; /* segment type */
|
||||
unsigned sd_dpl:2; /* segment descriptor priority level */
|
||||
unsigned sd_p:1; /* segment descriptor present */
|
||||
unsigned sd_hilimit:4; /* segment extent (msb) */
|
||||
unsigned sd_xx:1; /* unused */
|
||||
unsigned sd_long:1; /* long mode (cs only) */
|
||||
unsigned sd_def32:1; /* default 32 vs 16 bit size */
|
||||
unsigned sd_gran:1; /* limit granularity (byte/page units)*/
|
||||
unsigned sd_hibase:8; /* segment base address (msb) */
|
||||
} __packed;
|
||||
|
||||
#define USD_GETBASE(sd) (((sd)->sd_lobase) | (sd)->sd_hibase << 24)
|
||||
#define USD_SETBASE(sd, b) (sd)->sd_lobase = (b); \
|
||||
(sd)->sd_hibase = ((b) >> 24);
|
||||
#define USD_GETLIMIT(sd) (((sd)->sd_lolimit) | (sd)->sd_hilimit << 16)
|
||||
#define USD_SETLIMIT(sd, l) (sd)->sd_lolimit = (l); \
|
||||
(sd)->sd_hilimit = ((l) >> 16);
|
||||
|
||||
#ifdef __i386__
|
||||
/*
|
||||
* Gate descriptors (e.g. indirect descriptors)
|
||||
*/
|
||||
struct gate_descriptor {
|
||||
unsigned gd_looffset:16; /* gate offset (lsb) */
|
||||
unsigned gd_selector:16; /* gate segment selector */
|
||||
unsigned gd_stkcpy:5; /* number of stack wds to cpy */
|
||||
unsigned gd_xx:3; /* unused */
|
||||
unsigned gd_type:5; /* segment type */
|
||||
unsigned gd_dpl:2; /* segment descriptor priority level */
|
||||
unsigned gd_p:1; /* segment descriptor present */
|
||||
unsigned gd_hioffset:16; /* gate offset (msb) */
|
||||
} __packed;
|
||||
|
||||
/*
|
||||
* Generic descriptor
|
||||
*/
|
||||
union descriptor {
|
||||
struct segment_descriptor sd;
|
||||
struct gate_descriptor gd;
|
||||
};
|
||||
#else
|
||||
/*
|
||||
* Gate descriptors (e.g. indirect descriptors, trap, interrupt etc. 128 bit)
|
||||
* Only interrupt and trap gates have gd_ist.
|
||||
*/
|
||||
struct gate_descriptor {
|
||||
uint64_t gd_looffset:16; /* gate offset (lsb) */
|
||||
uint64_t gd_selector:16; /* gate segment selector */
|
||||
uint64_t gd_ist:3; /* IST table index */
|
||||
uint64_t gd_xx:5; /* unused */
|
||||
uint64_t gd_type:5; /* segment type */
|
||||
uint64_t gd_dpl:2; /* segment descriptor priority level */
|
||||
uint64_t gd_p:1; /* segment descriptor present */
|
||||
uint64_t gd_hioffset:48; /* gate offset (msb) */
|
||||
uint64_t sd_xx1:32;
|
||||
} __packed;
|
||||
|
||||
/*
|
||||
* Generic descriptor
|
||||
*/
|
||||
union descriptor {
|
||||
struct user_segment_descriptor sd;
|
||||
struct gate_descriptor gd;
|
||||
};
|
||||
#endif
|
||||
|
||||
/* system segments and gate types */
|
||||
#define SDT_SYSNULL 0 /* system null */
|
||||
#define SDT_SYS286TSS 1 /* system 286 TSS available */
|
||||
#define SDT_SYSLDT 2 /* system local descriptor table */
|
||||
#define SDT_SYS286BSY 3 /* system 286 TSS busy */
|
||||
#define SDT_SYS286CGT 4 /* system 286 call gate */
|
||||
#define SDT_SYSTASKGT 5 /* system task gate */
|
||||
#define SDT_SYS286IGT 6 /* system 286 interrupt gate */
|
||||
#define SDT_SYS286TGT 7 /* system 286 trap gate */
|
||||
#define SDT_SYSNULL2 8 /* system null again */
|
||||
#define SDT_SYS386TSS 9 /* system 386 TSS available */
|
||||
#define SDT_SYSTSS 9 /* system available 64 bit TSS */
|
||||
#define SDT_SYSNULL3 10 /* system null again */
|
||||
#define SDT_SYS386BSY 11 /* system 386 TSS busy */
|
||||
#define SDT_SYSBSY 11 /* system busy 64 bit TSS */
|
||||
#define SDT_SYS386CGT 12 /* system 386 call gate */
|
||||
#define SDT_SYSCGT 12 /* system 64 bit call gate */
|
||||
#define SDT_SYSNULL4 13 /* system null again */
|
||||
#define SDT_SYS386IGT 14 /* system 386 interrupt gate */
|
||||
#define SDT_SYSIGT 14 /* system 64 bit interrupt gate */
|
||||
#define SDT_SYS386TGT 15 /* system 386 trap gate */
|
||||
#define SDT_SYSTGT 15 /* system 64 bit trap gate */
|
||||
|
||||
/* memory segment types */
|
||||
#define SDT_MEMRO 16 /* memory read only */
|
||||
#define SDT_MEMROA 17 /* memory read only accessed */
|
||||
#define SDT_MEMRW 18 /* memory read write */
|
||||
#define SDT_MEMRWA 19 /* memory read write accessed */
|
||||
#define SDT_MEMROD 20 /* memory read only expand dwn limit */
|
||||
#define SDT_MEMRODA 21 /* memory read only expand dwn limit accessed */
|
||||
#define SDT_MEMRWD 22 /* memory read write expand dwn limit */
|
||||
#define SDT_MEMRWDA 23 /* memory read write expand dwn limit accessed*/
|
||||
#define SDT_MEME 24 /* memory execute only */
|
||||
#define SDT_MEMEA 25 /* memory execute only accessed */
|
||||
#define SDT_MEMER 26 /* memory execute read */
|
||||
#define SDT_MEMERA 27 /* memory execute read accessed */
|
||||
#define SDT_MEMEC 28 /* memory execute only conforming */
|
||||
#define SDT_MEMEAC 29 /* memory execute only accessed conforming */
|
||||
#define SDT_MEMERC 30 /* memory execute read conforming */
|
||||
#define SDT_MEMERAC 31 /* memory execute read accessed conforming */
|
||||
|
||||
/*
|
||||
* Size of IDT table
|
||||
*/
|
||||
#define NIDT 256 /* 32 reserved, 0x80 syscall, most are h/w */
|
||||
#define NRSVIDT 32 /* reserved entries for cpu exceptions */
|
||||
|
||||
/*
|
||||
* Entries in the Interrupt Descriptor Table (IDT)
|
||||
*/
|
||||
#define IDT_DE 0 /* #DE: Divide Error */
|
||||
#define IDT_DB 1 /* #DB: Debug */
|
||||
#define IDT_NMI 2 /* Nonmaskable External Interrupt */
|
||||
#define IDT_BP 3 /* #BP: Breakpoint */
|
||||
#define IDT_OF 4 /* #OF: Overflow */
|
||||
#define IDT_BR 5 /* #BR: Bound Range Exceeded */
|
||||
#define IDT_UD 6 /* #UD: Undefined/Invalid Opcode */
|
||||
#define IDT_NM 7 /* #NM: No Math Coprocessor */
|
||||
#define IDT_DF 8 /* #DF: Double Fault */
|
||||
#define IDT_FPUGP 9 /* Coprocessor Segment Overrun */
|
||||
#define IDT_TS 10 /* #TS: Invalid TSS */
|
||||
#define IDT_NP 11 /* #NP: Segment Not Present */
|
||||
#define IDT_SS 12 /* #SS: Stack Segment Fault */
|
||||
#define IDT_GP 13 /* #GP: General Protection Fault */
|
||||
#define IDT_PF 14 /* #PF: Page Fault */
|
||||
#define IDT_MF 16 /* #MF: FPU Floating-Point Error */
|
||||
#define IDT_AC 17 /* #AC: Alignment Check */
|
||||
#define IDT_MC 18 /* #MC: Machine Check */
|
||||
#define IDT_XF 19 /* #XF: SIMD Floating-Point Exception */
|
||||
#define IDT_IO_INTS NRSVIDT /* Base of IDT entries for I/O interrupts. */
|
||||
#define IDT_DTRACE_RET 0x20 /* DTrace pid provider Interrupt Vector */
|
||||
#define IDT_SYSCALL 0x80 /* System Call Interrupt Vector */
|
||||
|
||||
#if defined(__i386__) || defined(__ia64__)
|
||||
/*
|
||||
* Entries in the Global Descriptor Table (GDT)
|
||||
* Note that each 4 entries share a single 32 byte L1 cache line.
|
||||
* Some of the fast syscall instructions require a specific order here.
|
||||
*/
|
||||
#define GNULL_SEL 0 /* Null Descriptor */
|
||||
#define GPRIV_SEL 1 /* SMP Per-Processor Private Data */
|
||||
#define GUFS_SEL 2 /* User %fs Descriptor (order critical: 1) */
|
||||
#define GUGS_SEL 3 /* User %gs Descriptor (order critical: 2) */
|
||||
#define GCODE_SEL 4 /* Kernel Code Descriptor (order critical: 1) */
|
||||
#define GDATA_SEL 5 /* Kernel Data Descriptor (order critical: 2) */
|
||||
#define GUCODE_SEL 6 /* User Code Descriptor (order critical: 3) */
|
||||
#define GUDATA_SEL 7 /* User Data Descriptor (order critical: 4) */
|
||||
#define GBIOSLOWMEM_SEL 8 /* BIOS low memory access (must be entry 8) */
|
||||
#define GPROC0_SEL 9 /* Task state process slot zero and up */
|
||||
#define GLDT_SEL 10 /* Default User LDT */
|
||||
#define GUSERLDT_SEL 11 /* User LDT */
|
||||
#define GPANIC_SEL 12 /* Task state to consider panic from */
|
||||
#define GBIOSCODE32_SEL 13 /* BIOS interface (32bit Code) */
|
||||
#define GBIOSCODE16_SEL 14 /* BIOS interface (16bit Code) */
|
||||
#define GBIOSDATA_SEL 15 /* BIOS interface (Data) */
|
||||
#define GBIOSUTIL_SEL 16 /* BIOS interface (Utility) */
|
||||
#define GBIOSARGS_SEL 17 /* BIOS interface (Arguments) */
|
||||
#define GNDIS_SEL 18 /* For the NDIS layer */
|
||||
#ifdef XEN
|
||||
#define NGDT 9
|
||||
#else
|
||||
#define NGDT 19
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Entries in the Local Descriptor Table (LDT)
|
||||
*/
|
||||
#define LSYS5CALLS_SEL 0 /* forced by intel BCS */
|
||||
#define LSYS5SIGR_SEL 1
|
||||
#define L43BSDCALLS_SEL 2 /* notyet */
|
||||
#define LUCODE_SEL 3
|
||||
#define LSOL26CALLS_SEL 4 /* Solaris >= 2.6 system call gate */
|
||||
#define LUDATA_SEL 5
|
||||
/* separate stack, es,fs,gs sels ? */
|
||||
/* #define LPOSIXCALLS_SEL 5*/ /* notyet */
|
||||
#define LBSDICALLS_SEL 16 /* BSDI system call gate */
|
||||
#define NLDT (LBSDICALLS_SEL + 1)
|
||||
|
||||
#else /* !__i386__ && !__ia64__ */
|
||||
/*
|
||||
* Entries in the Global Descriptor Table (GDT)
|
||||
*/
|
||||
#define GNULL_SEL 0 /* Null Descriptor */
|
||||
#define GNULL2_SEL 1 /* Null Descriptor */
|
||||
#define GUFS32_SEL 2 /* User 32 bit %fs Descriptor */
|
||||
#define GUGS32_SEL 3 /* User 32 bit %gs Descriptor */
|
||||
#define GCODE_SEL 4 /* Kernel Code Descriptor */
|
||||
#define GDATA_SEL 5 /* Kernel Data Descriptor */
|
||||
#define GUCODE32_SEL 6 /* User 32 bit code Descriptor */
|
||||
#define GUDATA_SEL 7 /* User 32/64 bit Data Descriptor */
|
||||
#define GUCODE_SEL 8 /* User 64 bit Code Descriptor */
|
||||
#define GPROC0_SEL 9 /* TSS for entering kernel etc */
|
||||
/* slot 10 is second half of GPROC0_SEL */
|
||||
#define GUSERLDT_SEL 11 /* LDT */
|
||||
/* slot 12 is second half of GUSERLDT_SEL */
|
||||
#define NGDT 13
|
||||
#endif /* __i386__ || __ia64__ */
|
||||
|
||||
#endif /* !_X86_SEGMENTS_H_ */
|
||||
Loading…
Reference in New Issue
Block a user