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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/mipsel.r3000-linux.elf-fold.map
+8 -9
View File
@@ -9,21 +9,20 @@ Linker script and memory map
TARGET(elf32-littlemips)
0x0000000000100080 . = ((0x100000 + SIZEOF_HEADERS) + 0xc)
.text 0x0000000000100080 0x980
.text 0x0000000000100080 0x940
*(.text)
.text 0x0000000000100080 0x130 tmp/mipsel.r3000-linux.elf-fold.o
.text 0x00000000001001b0 0x850 tmp/mipsel.r3000-linux.elf-main.o
0x0000000000100424 get_page_mask
0x0000000000100870 upx_main
.text 0x00000000001001b0 0x810 tmp/mipsel.r3000-linux.elf-main.o
0x0000000000100830 upx_main
*(.data)
.data 0x0000000000100a00 0x0 tmp/mipsel.r3000-linux.elf-fold.o
.data 0x0000000000100a00 0x0 tmp/mipsel.r3000-linux.elf-main.o
.data 0x00000000001009c0 0x0 tmp/mipsel.r3000-linux.elf-fold.o
.data 0x00000000001009c0 0x0 tmp/mipsel.r3000-linux.elf-main.o
.data
.bss 0x0000000000100a00 0x0
.bss 0x0000000000100a00 0x0 tmp/mipsel.r3000-linux.elf-fold.o
.bss 0x0000000000100a00 0x0 tmp/mipsel.r3000-linux.elf-main.o
.bss 0x00000000001009c0 0x0
.bss 0x00000000001009c0 0x0 tmp/mipsel.r3000-linux.elf-fold.o
.bss 0x00000000001009c0 0x0 tmp/mipsel.r3000-linux.elf-main.o
LOAD tmp/mipsel.r3000-linux.elf-fold.o
LOAD tmp/mipsel.r3000-linux.elf-main.o
OUTPUT(tmp/mipsel.r3000-linux.elf-fold.bin elf32-littlemips)