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New option --catch-sigsegv on amd64, arm64, arm.v4a

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Catch SIGSEGV during de-compression, and print state info
("auto debug") using /proc/self/maps and gdb.
This was motivated by suspicion of unreliable hardware
which triggered "Heisenbugs": a crash which cannot be reproduced.
If SIGSGV occurs without the "auto debug" info, then that
implies an error user code after de-compression, often when
user code accesses /proc/self/exe, which is not the un-compressed file.
	modified:   misc/testsuite/upx_testsuite_1-expected_sha256sums.sh
	modified:   src/help.cpp
	modified:   src/main.cpp
	modified:   src/options.h
	modified:   src/p_lx_elf.cpp
	modified:   src/stub/Makefile
	modified:   src/stub/src/amd64-linux.elf-entry.S
	modified:   src/stub/src/amd64-linux.elf-fold.S
	modified:   src/stub/src/arm.v4a-linux.elf-entry.S
	modified:   src/stub/src/arm.v4a-linux.elf-fold.S
	modified:   src/stub/src/arm64-linux.elf-entry.S
	modified:   src/stub/src/arm64-linux.elf-fold.S
           plus generated .h .dump .map
This commit is contained in:
John Reiser
2025-08-19 12:10:32 -07:00
parent 4530e5c264
commit e85e8bec5d
26 changed files with 6223 additions and 5639 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/stub/tmp/arm.v4a-linux.elf-entry.bin.dump
Generated Vendored
+68 -61
View File
@@ -2,53 +2,86 @@ file format elf32-littlearm
Sections:
Idx Name Size VMA LMA File off Algn Flags
0 ELFMAINY 0 0 0 034 2**0 CONTENTS
1 HUMF_A 04 0 0 034 2**0 CONTENTS
2 HUMF_L 04 0 0 038 2**0 CONTENTS
3 UMF_ANDROID 0544 0 0 03c 2**2 CONTENTS
4 UMF_LINUX 0144 0 0 0580 2**2 CONTENTS
5 ELFMAINX 0264 0 0 06c4 2**2 CONTENTS
6 ELFMAINZ 0218 0264 0264 0928 2**0 CONTENTS
0 ELFSIGSEGV 0 0 0 034 2**0 CONTENTS
1 ELFMAINX2 0234 0 0 034 2**2 CONTENTS
2 ELFMAINY 0 0 0 0268 2**0 CONTENTS
3 HUMF_A 04 0 0 0268 2**0 CONTENTS
4 HUMF_L 04 0 0 026c 2**0 CONTENTS
5 UMF_ANDROID 0544 0 0 0270 2**2 CONTENTS
6 UMF_LINUX 0144 0 0 07b4 2**2 CONTENTS
7 ELFMAINX 028 0 0 08f8 2**0 CONTENTS
8 ELFMAINZ 0218 028 028 0920 2**0 CONTENTS
SYMBOL TABLE:
00000000 l d ELFMAINX2 0 ELFMAINX2
00000000 l d UMF_ANDROID 0 UMF_ANDROID
00000000 l d UMF_LINUX 0 UMF_LINUX
00000000 l d ELFMAINX 0 ELFMAINX
00000264 l d ELFMAINZ 0 ELFMAINZ
00000028 l d ELFMAINZ 0 ELFMAINZ
00000000 l d ELFSIGSEGV 0 ELFSIGSEGV
00000000 l d ELFMAINY 0 ELFMAINY
00000000 l d HUMF_A 0 HUMF_A
00000000 l d HUMF_L 0 HUMF_L
00000258 g ELFMAINX 0 get_page_mask
00000000 l d ELFMAINX 0 ELFMAINX
00000228 g ELFMAINX2 0 get_page_mask
00000000 *UND* 0 MFLG
00000350 g ELFMAINZ 0 getpid
00000264 g ELFMAINX 0 upx_mmap_and_fd
0000026c g ELFMAINZ 0 memcpy
00000114 g ELFMAINZ 0 getpid
00000234 g ELFMAINX2 0 upx_mmap_and_fd
00000030 g ELFMAINZ 0 memcpy
00000000 *UND* 0 O_BINFO
00000404 g ELFMAINZ 0 Psync
000002b0 g ELFMAINZ 0 mempcpy
0000033c g ELFMAINZ 0 ftruncate
00000364 g ELFMAINZ 0 lseek
000001c8 g ELFMAINZ 0 Psync
00000074 g ELFMAINZ 0 mempcpy
00000100 g ELFMAINZ 0 ftruncate
00000128 g ELFMAINZ 0 lseek
000002c4 g F UMF_ANDROID 0280 upx_mmap_and_fd_android
00000434 g ELFMAINZ 0 mmap
000001f8 g ELFMAINZ 0 mmap
00000000 g F UMF_LINUX 0144 upx_mmap_and_fd_linux
000003c8 g ELFMAINZ 0 uname
0000018c g ELFMAINZ 0 uname
00000000 g ELFMAINY 0 end_decompress
000003f0 g ELFMAINZ 0 write
00000314 g ELFMAINZ 0 fdatasync
00000264 g ELFMAINZ 0 get_upxfn_path
000002cc g ELFMAINZ 0 memfd_create
000001b4 g ELFMAINZ 0 write
000000d8 g ELFMAINZ 0 fdatasync
00000028 g ELFMAINZ 0 get_upxfn_path
00000090 g ELFMAINZ 0 memfd_create
00000004 g ELFMAINX 0 _start
000003a0 g ELFMAINZ 0 read
000003dc g ELFMAINZ 0 unlink
00000290 g ELFMAINZ 0 memset
00000194 g F ELFMAINX 0c4 ucl_nrv2b_decompress_8
0000042c g ELFMAINZ 0 my_bkpt
00000328 g ELFMAINZ 0 fsync
000003b4 g ELFMAINZ 0 stat
0000047c g ELFMAINZ 0 cpr0
00000300 g ELFMAINZ 0 exit
0000038c g ELFMAINZ 0 open
00000378 g ELFMAINZ 0 mkdir
000002ec g ELFMAINZ 0 close
00000164 g ELFMAINZ 0 read
000001a0 g ELFMAINZ 0 unlink
00000054 g ELFMAINZ 0 memset
00000164 g F ELFMAINX2 0c4 ucl_nrv2b_decompress_8
000001f0 g ELFMAINZ 0 my_bkpt
000000ec g ELFMAINZ 0 fsync
00000178 g ELFMAINZ 0 stat
00000240 g ELFMAINZ 0 cpr0
000000c4 g ELFMAINZ 0 exit
00000150 g ELFMAINZ 0 open
0000013c g ELFMAINZ 0 mkdir
000000b0 g ELFMAINZ 0 close
RELOCATION RECORDS FOR [ELFMAINX2]:
OFFSET TYPE VALUE
00000004 R_ARM_PC24 ELFMAINX2
00000008 R_ARM_PC24 ELFMAINX2
00000014 R_ARM_PC24 ELFMAINX2
0000001c R_ARM_PC24 ELFMAINX2
00000030 R_ARM_PC24 ELFMAINZ
00000068 R_ARM_PC24 ELFMAINX2
00000078 R_ARM_PC24 upx_mmap_and_fd
00000080 R_ARM_PC24 ELFMAINX2
000000b0 R_ARM_PC24 ELFMAINX2
000000ec R_ARM_PC24 ELFMAINX2
0000015c R_ARM_PC24 ELFMAINX2
00000174 R_ARM_PC24 ELFMAINX2
000001ac R_ARM_PC24 ELFMAINX2
000001b4 R_ARM_PC24 ELFMAINX2
000001b8 R_ARM_PC24 ELFMAINX2
000001c8 R_ARM_PC24 ELFMAINX2
000001cc R_ARM_PC24 ELFMAINX2
000001d0 R_ARM_PC24 ELFMAINX2
000001dc R_ARM_PC24 ELFMAINX2
000001ec R_ARM_PC24 ELFMAINX2
000001f0 R_ARM_PC24 ELFMAINX2
000001f8 R_ARM_PC24 ELFMAINX2
00000200 R_ARM_PC24 ELFMAINX2
00000204 R_ARM_PC24 ELFMAINX2
00000220 R_ARM_PC24 ELFMAINX2
00000224 R_ARM_PC24 ELFMAINX2
RELOCATION RECORDS FOR [HUMF_A]:
OFFSET TYPE VALUE
@@ -171,32 +204,6 @@ OFFSET TYPE VALUE
RELOCATION RECORDS FOR [ELFMAINX]:
OFFSET TYPE VALUE
00000000 R_ARM_ABS32 MFLG
00000010 R_ARM_PC24 ELFMAINX
00000014 R_ARM_PC24 ELFMAINX
00000020 R_ARM_PC24 ELFMAINX
00000028 R_ARM_PC24 ELFMAINX
00000058 R_ARM_PC24 ELFMAINZ
00000090 R_ARM_PC24 ELFMAINX
000000a0 R_ARM_PC24 upx_mmap_and_fd
000000a8 R_ARM_PC24 ELFMAINX
000000d8 R_ARM_PC24 ELFMAINX
00000114 R_ARM_PC24 ELFMAINX
0000018c R_ARM_PC24 ELFMAINX
000001a4 R_ARM_PC24 ELFMAINX
000001dc R_ARM_PC24 ELFMAINX
000001e4 R_ARM_PC24 ELFMAINX
000001e8 R_ARM_PC24 ELFMAINX
000001f8 R_ARM_PC24 ELFMAINX
000001fc R_ARM_PC24 ELFMAINX
00000200 R_ARM_PC24 ELFMAINX
0000020c R_ARM_PC24 ELFMAINX
0000021c R_ARM_PC24 ELFMAINX
00000220 R_ARM_PC24 ELFMAINX
00000228 R_ARM_PC24 ELFMAINX
00000230 R_ARM_PC24 ELFMAINX
00000234 R_ARM_PC24 ELFMAINX
00000250 R_ARM_PC24 ELFMAINX
00000254 R_ARM_PC24 ELFMAINX
RELOCATION RECORDS FOR [ELFMAINZ]:
OFFSET TYPE VALUE