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Differential D24547 Diff 70941 head/stand/userboot/userboot/elf64_freebsd.c

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head/stand/userboot/userboot/elf64_freebsd.c

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#define CR4_VMXE (1UL << 13) #define CR4_VMXE (1UL << 13)
#define CR4_PSE 0x00000010 #define CR4_PSE 0x00000010
#define CR0_PG 0x80000000 #define CR0_PG 0x80000000
#define CR0_PE 0x00000001 /* Protected mode Enable */ #define CR0_PE 0x00000001 /* Protected mode Enable */
#define CR0_NE 0x00000020 /* Numeric Error enable (EX16 vs IRQ13) */ #define CR0_NE 0x00000020 /* Numeric Error enable (EX16 vs IRQ13) */
#define PG_V 0x001 #define PG_V 0x001
#define PG_RW 0x002 #define PG_RW 0x002
#define PG_U 0x004
#define PG_PS 0x080 #define PG_PS 0x080
typedef uint64_t p4_entry_t; typedef uint64_t p4_entry_t;
typedef uint64_t p3_entry_t; typedef uint64_t p3_entry_t;
typedef uint64_t p2_entry_t; typedef uint64_t p2_entry_t;
#define GUEST_NULL_SEL 0 #define GUEST_NULL_SEL 0
#define GUEST_CODE_SEL 1 #define GUEST_CODE_SEL 1
▲ Show 20 Lines • Show All 50 Lines • ▼ Show 20 Lineself64_exec(struct preloaded_file *fp)
/* /*
* This is kinda brutal, but every single 1GB VM memory segment * This is kinda brutal, but every single 1GB VM memory segment
* points to the same first 1GB of physical memory. But it is * points to the same first 1GB of physical memory. But it is
* more than adequate. * more than adequate.
*/ */
for (i = 0; i < 512; i++) { for (i = 0; i < 512; i++) {
/* Each slot of the level 4 pages points to the same level 3 page */ /* Each slot of the level 4 pages points to the same level 3 page */
PT4[i] = (p4_entry_t) 0x3000; PT4[i] = (p4_entry_t) 0x3000;
PT4[i] |= PG_V | PG_RW | PG_U; PT4[i] |= PG_V | PG_RW;
/* Each slot of the level 3 pages points to the same level 2 page */ /* Each slot of the level 3 pages points to the same level 2 page */
PT3[i] = (p3_entry_t) 0x4000; PT3[i] = (p3_entry_t) 0x4000;
PT3[i] |= PG_V | PG_RW | PG_U; PT3[i] |= PG_V | PG_RW;
/* The level 2 page slots are mapped with 2MB pages for 1GB. */ /* The level 2 page slots are mapped with 2MB pages for 1GB. */
PT2[i] = i * (2 * 1024 * 1024); PT2[i] = i * (2 * 1024 * 1024);
PT2[i] |= PG_V | PG_RW | PG_PS | PG_U; PT2[i] |= PG_V | PG_RW | PG_PS;
} }
#ifdef DEBUG #ifdef DEBUG
printf("Start @ %#"PRIx64" ...\n", ehdr->e_entry); printf("Start @ %#"PRIx64" ...\n", ehdr->e_entry);
#endif #endif
dev_cleanup(); dev_cleanup();
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