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Put upx stub loader at high end of ELF output file on linux,

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and allow for block-by-block specification of filter and parameters.
	linker.cpp linker.h mem.cpp mem.h p_elf.h
	p_lx_elf.cpp p_lx_elf.h
	p_lx_exc.cpp p_lx_exc.h
	p_lx_sh.cpp  p_lx_sh.h
	p_unix.cpp p_unix.h
	packer.cpp packer.h
	stub/fold_elf86.asm stub/fold_exec86.asm stub/fold_sh86.asm
	stub/l_lx_elf.c  stub/l_lx_elf86.asm  stub/l_lx_elf86.lds
	stub/l_lx_exec.c stub/l_lx_exec86.asm stub/l_lx_exec86.lds
	stub/l_lx_sh.c   stub/l_lx_sh86.asm   stub/l_lx_sh86.lds
	stub/linux.hh

committer: jreiser <jreiser> 981084316 +0000
This commit is contained in:
John Reiser
2001-02-02 03:25:16 +00:00
parent 9005e50049
commit 40fddf1715
28 changed files with 797 additions and 614 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/stub/l_lx_sh86.asm
+27 -21
View File
@@ -106,12 +106,8 @@ decompress:
;__LEXEC020__
%define PAGE_MASK (~0<<12)
%define PAGE_SIZE ( 1<<12)
%define szElf32_Ehdr 0x34
%define p_memsz 5*4
%define MAP_FIXED 0x10
%define MAP_PRIVATE 0x02
%define MAP_ANONYMOUS 0x20
@@ -120,42 +116,52 @@ decompress:
%define PROT_EXEC 4
%define __NR_mmap 90
%define szElf32_Ehdr 0x34
%define szElf32_Phdr 8*4
%define e_entry (16 + 2*2 + 4)
%define p_memsz 5*4
%define szl_info 12
%define szp_info 12
%define p_filesize 4
; Decompress the rest of this loader, and jump to it
unfold:
pop esi ; &{ sz_uncompressed, sz_compressed, compressed_data...}
cld
lodsd
push eax ; sz_uncompressed (junk, actually)
push eax ; sz_uncompressed of folded stub (junk, actually)
push esp ; &sz_uncompressed
mov eax, ebp ; &decompress
and eax, dword PAGE_MASK ; &my_elfhdr
mov edx, eax ; need my_elfhdr later
add eax, [p_memsz + szElf32_Ehdr + eax]
mov edx, 0x00800000 ; origin of this program
mov eax, [p_memsz + szElf32_Ehdr + edx] ; length of loaded pages
add eax, edx
add edx, szElf32_Ehdr + 2*szElf32_Phdr ; convenient ptr
push eax ; &destination
; mmap a page to hold the decompressed program
xor ecx,ecx
push ecx
push ecx
mov ch, PAGE_SIZE >> 8
; mmap space for unfolded stub, and uncompressed script
mov ecx, [szl_info + p_filesize + edx] ; script size
add ecx, 1+ 3+ (3 -1)+ PAGE_SIZE ; '\0' + "-c" + decompr_overrun + stub
push eax ; offset (ignored when MAP_ANONYMOUS)
push eax ; fd (ignored when MAP_ANONYMOUS)
push byte MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS
push byte PROT_READ | PROT_WRITE | PROT_EXEC
push ecx
push ecx ; length
push eax ; destination
mov ebx, esp ; address of parameter vector for __NR_mmap
push byte __NR_mmap
pop eax
mov ebx, esp
int 0x80
lea ebx, [3+ PAGE_SIZE + eax] ; place for uncompressed script
add esp, byte 6*4 ; discard args to mmap
lodsd
push eax ; sz_compressed
push eax ; sz_compressed of folded stub
lodsd ; junk cto8, algo, unused[2]
push esi ; &compressed_data
call ebp ; decompress(&src, srclen, &dst, &dstlen)
pop ecx ; discard &compressed_data
pop ecx ; discard sz_compressed
pop ecx ; &destination
jmp ecx ; goto fold_begin at p_vaddr + p_memsz
pop eax ; discard &compressed_data
pop eax ; discard sz_compressed
ret ; &destination
main:
pop ebp ; &decompress
call unfold