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Differential D24547 Diff 70941 head/stand/i386/libi386/elf64_freebsd.c

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head/stand/i386/libi386/elf64_freebsd.c

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static int elf64_exec(struct preloaded_file *amp); static int elf64_exec(struct preloaded_file *amp);
static int elf64_obj_exec(struct preloaded_file *amp); static int elf64_obj_exec(struct preloaded_file *amp);
struct file_format amd64_elf = { elf64_loadfile, elf64_exec }; struct file_format amd64_elf = { elf64_loadfile, elf64_exec };
struct file_format amd64_elf_obj = { elf64_obj_loadfile, elf64_obj_exec }; struct file_format amd64_elf_obj = { elf64_obj_loadfile, elf64_obj_exec };
#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;
extern p4_entry_t PT4[]; extern p4_entry_t PT4[];
extern p3_entry_t PT3[]; extern p3_entry_t PT3[];
extern p2_entry_t PT2[]; extern p2_entry_t PT2[];
Show All 31 Lines return(err);
/* /*
* This is kinda brutal, but every single 1GB VM memory segment points to * This is kinda brutal, but every single 1GB VM memory segment points to
* the same first 1GB of physical memory. But it is more than adequate. * the same first 1GB of physical memory. But it is 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)VTOP((uintptr_t)&PT3[0]); PT4[i] = (p4_entry_t)VTOP((uintptr_t)&PT3[0]);
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)VTOP((uintptr_t)&PT2[0]); PT3[i] = (p3_entry_t)VTOP((uintptr_t)&PT2[0]);
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;
} }
entry_lo = ehdr->e_entry & 0xffffffff; entry_lo = ehdr->e_entry & 0xffffffff;
entry_hi = (ehdr->e_entry >> 32) & 0xffffffff; entry_hi = (ehdr->e_entry >> 32) & 0xffffffff;
#ifdef DEBUG #ifdef DEBUG
printf("Start @ %#llx ...\n", ehdr->e_entry); printf("Start @ %#llx ...\n", ehdr->e_entry);
#endif #endif
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