From 76d05dc695b06c4e987bb8078f78032441e1430c Mon Sep 17 00:00:00 2001 From: Greg Hartman Date: Wed, 23 Nov 2016 15:51:27 -0800 Subject: Clean checkin of the 6.03 code BUG: 32495852 Change-Id: I5038a3bb41e217380c1188463daec07b1e9b6b48 --- gnu-efi/gnu-efi-3.0/gnuefi/crt0-efi-ia32.S | 76 ++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 gnu-efi/gnu-efi-3.0/gnuefi/crt0-efi-ia32.S (limited to 'gnu-efi/gnu-efi-3.0/gnuefi/crt0-efi-ia32.S') diff --git a/gnu-efi/gnu-efi-3.0/gnuefi/crt0-efi-ia32.S b/gnu-efi/gnu-efi-3.0/gnuefi/crt0-efi-ia32.S new file mode 100644 index 0000000..f9d5191 --- /dev/null +++ b/gnu-efi/gnu-efi-3.0/gnuefi/crt0-efi-ia32.S @@ -0,0 +1,76 @@ +/* crt0-efi-ia32.S - x86 EFI startup code. + Copyright (C) 1999 Hewlett-Packard Co. + Contributed by David Mosberger . + + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * 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. + * Neither the name of Hewlett-Packard Co. 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER OR CONTRIBUTORS + BE LIABLE FOR ANYDIRECT, 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. +*/ + + .text + .align 4 + + .globl _start +_start: + pushl %ebp + movl %esp,%ebp + + pushl 12(%ebp) # copy "image" argument + pushl 8(%ebp) # copy "systab" argument + + call 0f +0: popl %eax + movl %eax,%ebx + + addl $ImageBase-0b,%eax # %eax = ldbase + addl $_DYNAMIC-0b,%ebx # %ebx = _DYNAMIC + + pushl %ebx # pass _DYNAMIC as second argument + pushl %eax # pass ldbase as first argument + call _relocate + popl %ebx + popl %ebx + testl %eax,%eax + jne .exit + + call efi_main # call app with "image" and "systab" argument + +.exit: leave + ret + + // hand-craft a dummy .reloc section so EFI knows it's a relocatable executable: + + .data +dummy: .long 0 + +#define IMAGE_REL_ABSOLUTE 0 + .section .reloc + .long dummy // Page RVA + .long 10 // Block Size (2*4+2) + .word (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy -- cgit v1.2.3