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fix error checking in mmap for i386-linux.elf [triggered by -fPIE]

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This commit is contained in:
John Reiser 2007-09-08 06:55:47 -07:00
parent b031c9e7f6
commit ec1bd342b8
3 changed files with 6 additions and 5 deletions
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1
NEWS
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@ -4,6 +4,7 @@ User visible changes for UPX
Changes in 3.02 (XX XXX 2007):
* fix unmapping on arm-linux.elf
* fix error checking in mmap for i386-linux.elf [triggered by -fPIE]
Changes in 3.01 (31 Jul 2007):
* new options --no-mode, --no-owner and --no-time to disable preservation

6
src/stub/i386-linux.elf-entry.h
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@ -29,8 +29,8 @@
#define STUB_I386_LINUX_ELF_ENTRY_SIZE 37553
#define STUB_I386_LINUX_ELF_ENTRY_ADLER32 0x96da8d2e
#define STUB_I386_LINUX_ELF_ENTRY_CRC32 0x566a9049
#define STUB_I386_LINUX_ELF_ENTRY_ADLER32 0x494b8c24
#define STUB_I386_LINUX_ELF_ENTRY_CRC32 0x516bf826
unsigned char stub_i386_linux_elf_entry[37553] = {
127, 69, 76, 70, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x 0 */
@ -466,7 +466,7 @@ unsigned char stub_i386_linux_elf_entry[37553] = {
91,106, 4, 88,205,128,179,127,106, 1, 88,205,128, 94,141, 69, /* 0x1ae0 */
247, 43, 0,137,194, 3, 64, 72, 5,255, 15, 0, 0, 37, 0,240, /* 0x1af0 */
255,255, 80, 49,201,106,255,106, 50,181, 16,106, 7, 81, 80,137, /* 0x1b00 */
227,106, 90, 88,205,128,133,192,120,158,146,147,252,173, 80,137, /* 0x1b10 */
227,106, 90, 88,205,128, 59, 3,117,158,146,147,252,173, 80,137, /* 0x1b10 */
225, 80, 81, 82,173, 80,173,137, 68, 36, 12, 86,255,213,131,196, /* 0x1b20 */
44,195, 93,232,181,255,255,255,116,109,112, 47,105, 51, 56, 54, /* 0x1b30 */
45,108,105,110,117,120, 46,101,108,102, 45,101,110,116,114,121, /* 0x1b40 */

4
src/stub/src/i386-linux.elf-entry.S
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@ -195,8 +195,8 @@ unfold:
push __NR_mmap
pop eax
int 0x80 // changes only %eax; %edx is live
test eax,eax
js msg_SELinux
cmp eax,[ebx]
jne msg_SELinux // not the expected address (includes error)
xchg eax, edx // %edx= page after .text; %eax= &Elf32_Ehdr of this program
xchg eax, ebx // %ebx= &Elf32_Ehdr of this program