ref: 70f700699ac06fb33267395c60f62b4fae3f4f15
dir: /sys/src/boot/efi/pe64.s/
TEXT mzhdr(SB), 1, $0
BYTE $'M'; BYTE $'Z'
WORD $0 /* e_cblp UNUSED */
WORD $0 /* e_cp UNUSED */
WORD $0 /* e_crlc UNUSED */
WORD $0 /* e_cparhdr UNUSED */
WORD $0 /* e_minalloc UNUSED */
WORD $0 /* e_maxalloc UNUSED */
WORD $0 /* e_ss UNUSED */
WORD $0 /* e_sp UNUSED */
WORD $0 /* e_csum UNUSED */
WORD $0 /* e_ip UNUSED */
WORD $0 /* e_cs UNUSED */
WORD $0 /* e_lsarlc UNUSED */
WORD $0 /* e_ovno UNUSED */
WORD $0 /* e_res UNUSED */
WORD $0
WORD $0
WORD $0
WORD $0
WORD $0 /* e_oemid UNUSED */
WORD $0 /* e_res2 UNUSED */
WORD $0
WORD $0
WORD $0
WORD $0
WORD $0
WORD $0
WORD $0
WORD $0
WORD $0
LONG $pehdr-IMAGEBASE(SB) /* offset to pe header */
TEXT pehdr(SB), 1, $0
BYTE $'P'; BYTE $'E'; BYTE $0; BYTE $0
WORD $0x8664 /* Machine (AMD64) */
WORD $1 /* NumberOfSections */
LONG $0 /* TimeDateStamp UNUSED */
LONG $0 /* PointerToSymbolTable UNUSED */
LONG $0 /* NumberOfSymbols UNUSED */
WORD $0xF0 /* SizeOfOptionalHeader */
WORD $2223 /* Characteristics */
WORD $0x20B /* Magic (PE32+) */
BYTE $9 /* MajorLinkerVersion UNUSED */
BYTE $0 /* MinorLinkerVersion UNUSED */
LONG $0 /* SizeOfCode UNUSED */
LONG $0 /* SizeOfInitializedData UNUSED */
LONG $0 /* SizeOfUninitializedData UNUSED */
LONG $start-IMAGEBASE(SB)/* AddressOfEntryPoint */
LONG $0 /* BaseOfCode UNUSED */
QUAD $IMAGEBASE /* ImageBase */
LONG $0x200 /* SectionAlignment */
LONG $0x200 /* FileAlignment */
WORD $4 /* MajorOperatingSystemVersion UNUSED */
WORD $0 /* MinorOperatingSystemVersion UNUSED */
WORD $0 /* MajorImageVersion UNUSED */
WORD $0 /* MinorImageVersion UNUSED */
WORD $4 /* MajorSubsystemVersion */
WORD $0 /* MinorSubsystemVersion UNUSED */
LONG $0 /* Win32VersionValue UNUSED */
LONG $end-IMAGEBASE(SB) /* SizeOfImage */
LONG $start-IMAGEBASE(SB)/* SizeOfHeaders */
LONG $0 /* CheckSum UNUSED */
WORD $10 /* Subsystem (10 = efi application) */
WORD $0 /* DllCharacteristics UNUSED */
QUAD $0 /* SizeOfStackReserve UNUSED */
QUAD $0 /* SizeOfStackCommit UNUSED */
QUAD $0 /* SizeOfHeapReserve UNUSED */
QUAD $0 /* SizeOfHeapCommit UNUSED */
LONG $0 /* LoaderFlags UNUSED */
LONG $16 /* NumberOfRvaAndSizes UNUSED */
LONG $0; LONG $0
LONG $0; LONG $0
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
LONG $0; LONG $0 /* RVA */
BYTE $'.'; BYTE $'t'; BYTE $'e'; BYTE $'x'
BYTE $'t'; BYTE $0; BYTE $0; BYTE $0
LONG $edata-(IMAGEBASE+0x200)(SB) /* VirtualSize */
LONG $start-IMAGEBASE(SB) /* VirtualAddress */
LONG $edata-(IMAGEBASE+0x200)(SB) /* SizeOfData */
LONG $start-IMAGEBASE(SB) /* PointerToRawData */
LONG $0 /* PointerToRelocations UNUSED */
LONG $0 /* PointerToLinenumbers UNUSED */
WORD $0 /* NumberOfRelocations UNUSED */
WORD $0 /* NumberOfLinenumbers UNUSED */
LONG $0x86000020 /* Characteristics (code, execute, read, write) */
/* padding to get start(SB) at IMAGEBASE+0x200 */
LONG $0; LONG $0; LONG $0; LONG $0;
LONG $0; LONG $0; LONG $0; LONG $0;
LONG $0; LONG $0; LONG $0; LONG $0;
LONG $0; LONG $0; LONG $0; LONG $0;
LONG $0; LONG $0; LONG $0; LONG $0;
LONG $0; LONG $0; LONG $0; LONG $0;
LONG $0; LONG $0; LONG $0; LONG $0;
LONG $0; LONG $0; LONG $0; LONG $0;
LONG $0; LONG $0; LONG $0; LONG $0
MODE $64
TEXT start(SB), 1, $-4
/* spill arguments */
MOVQ CX, 8(SP)
MOVQ DX, 16(SP)
CALL reloc(SP)
TEXT reloc(SB), 1, $-4
MOVQ 0(SP), SI
SUBQ $reloc-IMAGEBASE(SB), SI
MOVQ $IMAGEBASE, DI
MOVQ $edata-IMAGEBASE(SB), CX
CLD
REP; MOVSB
MOVQ 16(SP), BP
MOVQ $efimain(SB), DI
MOVQ DI, (SP)
RET
TEXT eficall(SB), 1, $-4
MOVQ SP, SI
MOVQ SP, DI
MOVL $(8*16), CX
SUBQ CX, DI
ANDQ $~15ULL, DI
LEAQ 16(DI), SP
CLD
REP; MOVSB
SUBQ $(8*16), SI
MOVQ 0(SP), CX
MOVQ 8(SP), DX
MOVQ 16(SP), R8
MOVQ 24(SP), R9
CALL BP
MOVQ SI, SP
RET
#include "mem.h"
TEXT jump(SB), 1, $-4
CLI
/* load zero length idt */
MOVL $_idtptr64p<>(SB), AX
MOVL (AX), IDTR
/* load temporary gdt */
MOVL $_gdtptr64p<>(SB), AX
MOVL (AX), GDTR
/* load CS with 32bit code segment */
PUSHQ $SELECTOR(3, SELGDT, 0)
PUSHQ $_warp32<>(SB)
RETFQ
MODE $32
TEXT _warp32<>(SB), 1, $-4
/* load 32bit data segments */
MOVL $SELECTOR(2, SELGDT, 0), AX
MOVW AX, DS
MOVW AX, ES
MOVW AX, FS
MOVW AX, GS
MOVW AX, SS
/* turn off paging */
MOVL CR0, AX
ANDL $0x7fffffff, AX /* ~(PG) */
MOVL AX, CR0
MOVL $0, AX
MOVL AX, CR3
/* disable long mode */
MOVL $0xc0000080, CX /* Extended Feature Enable */
RDMSR
ANDL $0xfffffeff, AX /* Long Mode Disable */
WRMSR
/* diable pae */
MOVL CR4, AX
ANDL $0xffffff5f, AX /* ~(PAE|PGE) */
MOVL AX, CR4
JMP *BP
TEXT _gdt<>(SB), 1, $-4
/* null descriptor */
LONG $0
LONG $0
/* (KESEG) 64 bit long mode exec segment */
LONG $(0xFFFF)
LONG $(SEGL|SEGG|SEGP|(0xF<<16)|SEGPL(0)|SEGEXEC|SEGR)
/* 32 bit data segment descriptor for 4 gigabytes (PL 0) */
LONG $(0xFFFF)
LONG $(SEGG|SEGB|(0xF<<16)|SEGP|SEGPL(0)|SEGDATA|SEGW)
/* 32 bit exec segment descriptor for 4 gigabytes (PL 0) */
LONG $(0xFFFF)
LONG $(SEGG|SEGD|(0xF<<16)|SEGP|SEGPL(0)|SEGEXEC|SEGR)
TEXT _gdtptr64p<>(SB), 1, $-4
WORD $(4*8-1)
QUAD $_gdt<>(SB)
TEXT _idtptr64p<>(SB), 1, $-4
WORD $0
QUAD $0