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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
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src/stub/fold_exec86.asm
+15 -7
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@@ -27,18 +27,26 @@
;; control just falls through, after this part and compiled C code
;; are uncompressed.
fold_begin: ;; this label is known to the Makefile
%define szElf32_Ehdr 0x34
%define szElf32_Phdr 8*4
%define e_entry (16 + 2*2 + 4)
%define p_vaddr 2*4
%define p_memsz 5*4
%define szl_info 12
%define szp_info 12
fold_begin: ; enter: %ebx= &Elf32_Ehdr of this program
pop eax ; discard &dstlen
pop eax ; discard dstlen
pop eax ; Pop the argument count
mov ecx, esp ; argv starts just at the current stack top
lea edx, [ecx+eax*4+4] ; envp = &argv[argc + 1]
push eax ; Restore the stack
push ebp ; argument: &decompress
push ebx ; argument: &my_elfhdr
push edx ; argument: envp
push ecx ; argument: argv
lea edx, [esp+eax*4+4] ; envp = &argv[argc + 1]
mov esi, [e_entry + ebx]
add ebx, szElf32_Ehdr + szElf32_Phdr + szl_info
sub esi, ebx ; length
lea edi, [2 + ebp] ; f_unfilter, maybe
pusha ; (f_unf, cprLen, f_decpr, xx, cprSrc, envp, argv, argc)
EXTERN upx_main
call upx_main ; Call the UPX main function
hlt ; Crash if somehow upx_main does return