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i386: new stub strategy to avoid problems with early mmap layout

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The stub occupies the same region that execve() would create
for the original progam.  The stub copies everything to a new area,
erases the original region, replaces it with the de-compressed
program, and erases the copy of itself via the escape hatch.
The copy is inexpensive via mmap() of /proc/self/exe.

	modified:   stub/src/i386-linux.elf-entry.S
	modified:   stub/src/i386-linux.elf-fold.S
	modified:   stub/src/i386-linux.elf-main.c

	modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
	modified:   p_lx_interp.cpp
	modified:   p_lx_interp.h
	modified:   p_lx_sh.cpp
	modified:   p_lx_sh.h
	modified:   p_mach.cpp
	modified:   p_mach.h
	modified:   p_unix.cpp
	modified:   p_unix.h
	modified:   p_vmlinx.cpp

	plus .h, .map, .dump
This commit is contained in:
John Reiser
2017-10-01 15:56:34 -07:00
parent 26be845563
commit 9e8de4abe5
30 changed files with 2943 additions and 3118 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/stub/tmp/powerpc-linux.elf-fold.map
+9 -9
View File
@@ -9,7 +9,7 @@ Linker script and memory map
TARGET(elf32-powerpc)
0x0000000000100080 . = ((0x100000 + SIZEOF_HEADERS) + 0xc)
.text 0x0000000000100080 0x105c
.text 0x0000000000100080 0xfdc
*(.text)
.text 0x0000000000100080 0x264 tmp/powerpc-linux.elf-fold.o
0x0000000000100080 get_page_mask
@@ -24,19 +24,19 @@ TARGET(elf32-powerpc)
0x00000000001002b4 open
0x00000000001002c4 mprotect
0x00000000001002bc close
.text 0x00000000001002e4 0xdf8 tmp/powerpc-linux.elf-main.o
0x0000000000100ecc upx_main
.text 0x00000000001002e4 0xd78 tmp/powerpc-linux.elf-main.o
0x0000000000100e54 upx_main
*(.data)
.data 0x00000000001010dc 0x0 tmp/powerpc-linux.elf-fold.o
.data 0x00000000001010dc 0x0 tmp/powerpc-linux.elf-main.o
.data 0x000000000010105c 0x0 tmp/powerpc-linux.elf-fold.o
.data 0x000000000010105c 0x0 tmp/powerpc-linux.elf-main.o
.data
.bss 0x00000000001010dc 0x0
.bss 0x00000000001010dc 0x0 tmp/powerpc-linux.elf-fold.o
.bss 0x00000000001010dc 0x0 tmp/powerpc-linux.elf-main.o
.bss 0x000000000010105c 0x0
.bss 0x000000000010105c 0x0 tmp/powerpc-linux.elf-fold.o
.bss 0x000000000010105c 0x0 tmp/powerpc-linux.elf-main.o
.rela.dyn 0x00000000001010dc 0x0
.rela.dyn 0x000000000010105c 0x0
.rela.text 0x0000000000000000 0x0 tmp/powerpc-linux.elf-fold.o
LOAD tmp/powerpc-linux.elf-fold.o
LOAD tmp/powerpc-linux.elf-main.o