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Avoid "ASCII armor" area below 16MB (0x01000000) for exec-shield and

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pre-linked PT_INTERP such as ld-linux.so.2
	l_lx_elf86.asm l_lx_elf86.lds l_lx_sh86.asm l_lx_sh86.lds

committer: jreiser <jreiser> 1084925700 +0000
This commit is contained in:
John Reiser 2004-05-19 00:15:00 +00:00
parent aee150474c
commit 9769599f1d
4 changed files with 7 additions and 7 deletions
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4
src/stub/l_lx_elf86.asm
View File

@ -141,7 +141,7 @@ unfold:
lodsd
push eax ; sz_uncompressed (junk, actually)
push esp ; &sz_uncompressed
mov eax, 0x400000
mov eax, 0x1000000
push eax ; &destination
; mmap a page to hold the decompressed program
@ -158,7 +158,7 @@ unfold:
pop eax
int 0x80
xchg eax, ebx
mov bh, PAGE_SIZE>>8 ; ebx= 0x401000
mov bh, PAGE_SIZE>>8 ; ebx= 0x1001000
add esp, byte 6*4 ; discard args to mmap
lodsd

4
src/stub/l_lx_elf86.lds
View File

@ -38,8 +38,8 @@ PHDRS
}
SECTIONS
{
/* 0x00401000: l_lx_elf86.asm assumes 1 page up from 64KB boundary */
. = 0x00401000 + SIZEOF_HEADERS + 12; /* 12==sizeof(l_info) */
/* 0x01001000: l_lx_elf86.asm assumes 1 page up from 64KB boundary */
. = 0x01001000 + SIZEOF_HEADERS + 12; /* 12==sizeof(l_info) */
.text : {
*(.text)
*(.data)

2
src/stub/l_lx_sh86.asm
View File

@ -136,7 +136,7 @@ unfold:
lodsd
push eax ; sz_uncompressed of folded stub (junk, actually)
push esp ; &sz_uncompressed
mov edx, 0x00800000 ; origin of this program
mov edx, 0x01400000 ; 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

4
src/stub/l_lx_sh86.lds
View File

@ -38,8 +38,8 @@ PHDRS /* force exactly 1 ELF32_Phdr: in particular, no PT_GNU_STACK */
SECTIONS
{
/* 0x00800000: avoid 0x00400000 for shell itself being compressed */
. = 0x00800000 + SIZEOF_HEADERS;
/* 0x01400000: avoid 0x01000000 for shell itself being compressed */
. = 0x01400000 + SIZEOF_HEADERS;
. = ALIGN(0x80);
.data : { /* put everything together in one Phdr */
*(.text)