diff options
Diffstat (limited to 'sys/boot/ia64/efi/start.S')
| -rw-r--r-- | sys/boot/ia64/efi/start.S | 290 |
1 files changed, 0 insertions, 290 deletions
diff --git a/sys/boot/ia64/efi/start.S b/sys/boot/ia64/efi/start.S deleted file mode 100644 index 9d28a96..0000000 --- a/sys/boot/ia64/efi/start.S +++ /dev/null @@ -1,290 +0,0 @@ -/*- - * Copyright (c) 2001 Doug Rabson - * All rights reserved. - * - * 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. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. - * - * $FreeBSD$ - */ - - .text - -#include <machine/asm.h> - -#define EFI_SUCCESS 0 -#define EFI_LOAD_ERROR 1 -#define EFI_BUFFER_TOO_SMALL 5 - -#define DT_NULL 0 /* Terminating entry. */ -#define DT_PLTRELSZ 2 /* Total size in bytes of PLT relocations. */ -#define DT_SYMTAB 6 /* Address of symbol table. */ -#define DT_RELA 7 /* Address of ElfNN_Rela relocations. */ -#define DT_RELASZ 8 /* Total size of ElfNN_Rela relocations. */ -#define DT_RELAENT 9 /* Size of each ElfNN_Rela relocation entry. */ -#define DT_SYMENT 11 /* Size of each symbol table entry. */ -#define DT_JMPREL 23 /* Address of PLT relocations. */ - -#define R_IA_64_NONE 0 /* None */ -#define R_IA_64_DIR64LSB 0x27 /* word64 LSB S + A */ -#define R_IA_64_FPTR64LSB 0x47 /* word64 LSB @fptr(S + A) */ -#define R_IA_64_REL32LSB 0x6d /* word32 LSB BD + A */ -#define R_IA_64_REL64LSB 0x6f /* word64 LSB BD + A */ -#define R_IA_64_IPLTLSB 0x81 /* function descriptor LSB speciaal */ - -ENTRY(_start, 2) - alloc loc0=ar.pfs,2,3,3,0 - mov loc1=rp - movl loc2=@gprel(ImageBase) - ;; - add loc2=gp,loc2 - ;; - mov out0=loc2 - mov out1=in1 - ;; - br.call.sptk.few rp=_reloc // relocate image - - cmp.ne p6,p0=EFI_SUCCESS,r8 // did it work? -(p6) br.cond.dpnt.few 9f - - mov out0=in0 // image_handle - mov out1=in1 // system_table - br.call.sptk.few rp=efi_main -9: - mov ar.pfs=loc0 - mov rp=loc1 - ;; - br.ret.sptk.few rp -END(_start) - - // PLABEL for PE32+ - .section .plabel, "a" - .align 16 - .global _start_plabel -_start_plabel: - data16 @iplt(_start) - .previous - - // A PE32+ relocation entry for the plabel - .section .reloc, "a" - data4 _start_plabel - data4 12 - data2 (10 << 12) + 0 - data2 (10 << 12) + 8 - .previous - -// in0: image base -// in1: system table -// -// XXX Assumes PLT relocations are of type Elf_Rela -// -// r2 = address of fptr_storage -// r3 = address of fptr_storage_end -// r4 = address of first free fptr -// -// r15 = r_offset -// r16 = r_info -OR- d_tag -// r17 = r_addend -OR- d_val (=d_ptr) -// r18 = address of .rela dynamic section -// r19 = size of .rela section -// r20 = size of .rela element (Elf_Rela) -// r21 = address of first PLT relocation -// r22 = size of PLT relocations -// r23 = relocation type -// r24 = address of symbol -// r28 = R_IA_64_IPLTLSB -// f8 = address of symbol table -// f9 = size of symtab element - -STATIC_ENTRY(_reloc, 2) - alloc loc0=ar.pfs,2,2,0,0 - ;; - mov loc1=rp - movl r29=@gprel(_DYNAMIC) // find _DYNAMIC etc. - ;; - add r15=r29,gp - movl r29=@gprel(fptr_storage) - ;; - add r2=r29,gp - movl r29=@gprel(fptr_storage_end) - ;; - add r3=r29,gp - mov r4=r2 - mov r19=0 - mov r22=0 - mov r20=24 - mov r28=R_IA_64_IPLTLSB - ;; -1: - ld8 r16=[r15],8 // read r15->d_tag - ;; - ld8 r17=[r15],8 // and r15->d_val - ;; - cmp.eq p6,p0=DT_NULL,r16 // done? -(p6) br.cond.dpnt.few 2f - ;; - cmp.eq p6,p0=DT_RELA,r16 // rela section? - ;; -(p6) add r18=r17,in0 - cmp.eq p6,p0=DT_RELASZ,r16 // rela section size? - ;; -(p6) mov r19=r17 - cmp.eq p6,p0=DT_RELAENT,r16 // rela entry size? - ;; -(p6) mov r20=r17 - cmp.eq p6,p0=DT_JMPREL,r16 // PLT relocs? - ;; -(p6) add r21=r17,in0 - cmp.eq p6,p0=DT_PLTRELSZ,r16 // PLT relocs size? - ;; -(p6) mov r22=r17 - cmp.eq p6,p0=DT_SYMTAB,r16 // symbol table? - ;; -(p6) add r29=r17,in0 - ;; -(p6) setf.sig f8=r29 - cmp.eq p6,p0=DT_SYMENT,r16 // symbol entry size? - ;; -(p6) setf.sig f9=r17 - br.dptk 1b - -2: - cmp.lt p6,p0=0,r19 -(p6) br.cond.dptk 3f - ;; - mov r19=r22 - mov r18=r21 - mov r21=0 - mov r22=0 - ;; - cmp.lt p6,p0=0,r19 -(p6) br.cond.dptk 3f - ;; - mov r8=EFI_SUCCESS - br.dptk 9f -3: - ld8 r29=[r18],8 // read r_offset - ;; - ld8 r16=[r18],8 // read r_info - add r15=r29,in0 // relocate r_offset - ;; - ld8 r17=[r18],8 // read r_addend - sub r19=r19,r20 // update relasz - extr.u r23=r16,0,32 // ELF64_R_TYPE(r16) - ;; - cmp.eq p6,p0=R_IA_64_NONE,r23 -(p6) br.cond.dpnt.few 2b - ;; - cmp.eq p6,p0=R_IA_64_REL32LSB,r23 -(p6) br.cond.dptk.few 3f - ;; - cmp.eq p6,p0=R_IA_64_REL64LSB,r23 -(p6) br.cond.dptk.few 4f - ;; - extr.u r29=r16,32,32 // ELF64_R_SYM(r16) - ;; - setf.sig f10=r29 // so we can multiply - ;; - xma.lu f10=f10,f9,f8 // f10=symtab + r_sym*syment - ;; - getf.sig r29=f10 - ;; - add r29=8,r29 // address of st_value - ;; - ld8 r29=[r29] // read symbol value - ;; - add r24=r29,in0 // relocate symbol value - ;; - cmp.eq p6,p0=R_IA_64_DIR64LSB,r23 -(p6) br.cond.dptk.few 5f - ;; - cmp.eq p6,p0=R_IA_64_FPTR64LSB,r23 -(p6) br.cond.dptk.few 6f - ;; - cmp.ne p6,p0=r28,r23 // IPLTLSB -(p6) br.cond.dptk.few 2b - - // IPLTLSB - add r29=r24,r17 // S + A - ;; - st8 [r15]=r29,8 // fdesc:FP - ;; - st8 [r15]=gp // fdesc:GP - br.cond.sptk.few 2b - - // REL32LSB -3: - add r29=in0,r17 - ;; - st4 [r15]=r29 - br.cond.sptk.few 2b - - // REL64LSB -4: - add r29=in0,r17 // BD + A - ;; - st8 [r15]=r29 // word64 - br.cond.sptk.few 2b - - // DIR64LSB -5: - add r29=r24,r17 // S + A - ;; - st8 [r15]=r29 // word64 - br.cond.sptk.few 2b - -6: - mov r29=r2 // FPTR64LSB - ;; -7: - cmp.geu p6,p0=r29,r4 // end of fptrs? -(p6) br.cond.dpnt.few 8f // can't find existing fptr - ld8 r17=[r29] // read function from fptr - ;; - cmp.eq p6,p0=r24,r17 // same function? - ;; -(p6) st8 [r15]=r29 // reuse fptr -(p6) br.cond.sptk.few 2b // done - add r29=16,r29 // next fptr - br.sptk.few 7b -8: - mov r8=EFI_BUFFER_TOO_SMALL // failure return value - cmp.geu p6,p0=r4,r3 // space left? -(p6) br.cond.dpnt.few 9f // bail out - st8 [r15]=r4 // install fptr - ;; - st8 [r4]=r24,8 // write fptr address - ;; - st8 [r4]=gp,8 // write fptr gp - br.cond.sptk.few 2b - -9: - mov ar.pfs=loc0 - mov rp=loc1 - ;; - br.ret.sptk.few rp -END(_reloc) - - .data - .align 16 -fptr_storage: - .space 1024*16 // XXX -fptr_storage_end: |
