Cleanup stub/*.lds linker scripts

modified: Makefile modified: src/amd64-linux.elf-fold.lds modified: src/amd64-linux.elf-so_fold.lds modified: src/arm.v4a-linux.elf-entry.lds modified: src/arm.v4a-linux.elf-fold.lds modified: src/arm.v4a-linux.elf-so_entry.lds modified: src/arm.v4a-linux.elf-so_fold.lds modified: src/arm.v5a-linux.elf-entry.lds modified: src/arm.v5a-linux.elf-fold.lds modified: src/arm.v5a-linux.elf-so_entry.lds modified: src/arm.v5a-linux.elf-so_fold.lds modified: src/arm64-linux.elf-fold.lds modified: src/arm64-linux.elf-so_fold.lds modified: src/armeb.v4a-linux.elf-entry.lds modified: src/armeb.v4a-linux.elf-fold.lds modified: src/i386-bsd.elf-fold.lds modified: src/i386-linux.elf-fold.lds modified: src/i386-linux.elf-so_entry.lds modified: src/i386-linux.elf-so_fold.lds modified: src/i386-linux.elf.execve-fold.lds modified: src/i386-linux.elf.interp-fold.lds modified: src/i386-linux.elf.shell-fold.lds modified: src/mips.r3000-linux.elf-fold.lds modified: src/mipsel.r3000-linux.elf-fold.lds modified: src/powerpc-linux.elf-fold.lds modified: src/powerpc64-linux.elf-fold.lds modified: src/powerpc64le-linux.elf-fold.lds new file: src/upxfd_linux.c
2025-09-28 19:06:07 +08:00 · 2024-11-18 16:00:36 -08:00 · 2024-11-18 16:00:36 -08:00 · 3d6b2e4617
commit 3d6b2e4617
parent 886e325cbf
28 changed files with 156 additions and 113 deletions
--- a/src/stub/Makefile
+++ b/src/stub/Makefile
@ -565,23 +565,27 @@ tc.arm.v4a-linux.elf.gcc += -Wall -W -Wcast-align -Wcast-qual -Wstrict-prototype

 arm.v4a-linux.elf-entry.h : $(srcdir)/src/arm.v4a-linux.elf-entry.lds \
 	    $(srcdir)/src/$$T.S \
-	    tmp/arm.v4a-linux.elf-upxfd_android.o
+	    tmp/arm.v4a-linux.elf-upxfd_android.o \
+	    tmp/arm.v4a-linux.elf-upxfd_linux.o
 	$(call tc,gcc) -c  $(srcdir)/src/$T.S -o tmp/$T.o
 	multiarch-ld-2.17 -r --format=elf32-littlearm -Map tmp/$T.map -o tmp/$T.bin \
 	    -T src/arm.v4a-linux.elf-entry.lds \
 	    tmp/$T.o \
-	    tmp/arm.v4a-linux.elf-upxfd_android.o
+	    tmp/arm.v4a-linux.elf-upxfd_android.o \
+	    tmp/arm.v4a-linux.elf-upxfd_linux.o
 	$(call tc,f-embed_objinfo_without_xstrip,tmp/$T.bin)
 	$(call tc,bin2h) tmp/$T.bin $@

 arm.v4a-linux.elf-so_entry.h : src/arm.v4a-linux.elf-so_entry.lds \
 	    $(srcdir)/src/$$T.S \
-	    tmp/arm.v4a-linux.elf-upxfd_android.o
+	    tmp/arm.v4a-linux.elf-upxfd_android.o \
+	    tmp/arm.v4a-linux.elf-upxfd_linux.o
 	$(call tc,gcc) -c  $(srcdir)/src/$T.S -o tmp/$T.o
 	multiarch-ld-2.17 -r --format=elf32-littlearm -Map tmp/$T.map -o tmp/$T.bin \
 	    -T src/arm.v4a-linux.elf-so_entry.lds \
 	    tmp/$T.o \
-	    tmp/arm.v4a-linux.elf-upxfd_android.o
+	    tmp/arm.v4a-linux.elf-upxfd_android.o \
+	    tmp/arm.v4a-linux.elf-upxfd_linux.o
 	$(call tc,f-embed_objinfo_without_xstrip,tmp/$T.bin)
 	$(call tc,bin2h) tmp/$T.bin $@

@ -590,9 +594,15 @@ tmp/arm.v4a-linux.elf-upxfd_android.o : $(srcdir)/src/upxfd_android.c
 	$(call tc,objcopy) -R .comment $@
 	$(call tc,objdump) -Dr $(tc_objdump_disasm_options) $@ | $(RTRIM) > $@.disasm

+tmp/arm.v4a-linux.elf-upxfd_linux.o : $(srcdir)/src/upxfd_linux.c
+	$(call tc,gcc) -c -O $< -o $@
+	$(call tc,objcopy) -R .comment $@
+	$(call tc,objdump) -Dr $(tc_objdump_disasm_options) $@ | $(RTRIM) > $@.disasm
+
 arm.v4a-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
 	    tmp/$$T.o \
 	    tmp/arm.v4a-linux.elf-upxfd_android.o \
+	    tmp/arm.v4a-linux.elf-upxfd_linux.o \
 	    tmp/arm.v4a-expand.o \
 	    tmp/arm.v4a-linux.elf-main2.o
 	$(call tc,ld) -r -T $(srcdir)/src/$T.lds -Map tmp/$T.map $(filter %.o,$^) -o tmp/$T.bin
@ -602,6 +612,7 @@ arm.v4a-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
 arm.v4a-linux.elf-so_fold.h : $(srcdir)/src/$$T.lds \
 	    tmp/$$T.o \
 	    tmp/arm.v4a-linux.elf-upxfd_android.o \
+	    tmp/arm.v4a-linux.elf-upxfd_linux.o \
 	    tmp/arm.v4a-expand.o \
 	    tmp/arm.v4a-linux.elf-so_main.o
 	multiarch-ld-2.23.90 -r -T $(srcdir)/src/$T.lds -Map tmp/$T.map $(filter %.o,$^) -o tmp/$T.bin
@ -670,23 +681,27 @@ tc.arm.v5a-linux.elf.gcc += -Wall -W -Wcast-align -Wcast-qual -Wstrict-prototype

 arm.v5a-linux.elf-entry.h : $(srcdir)/src/arm.v5a-linux.elf-entry.lds \
 	    $(srcdir)/src/$$T.S \
-	    tmp/arm.v5a-linux.elf-upxfd_android.o
+	    tmp/arm.v5a-linux.elf-upxfd_android.o \
+	    tmp/arm.v5a-linux.elf-upxfd_linux.o
 	$(call tc,gcc) -c  $(srcdir)/src/$T.S -o tmp/$T.o
 	multiarch-ld-2.17 -r --format=elf32-littlearm -Map tmp/$T.map -o tmp/$T.bin \
 	    -T src/arm.v5a-linux.elf-entry.lds \
 	    tmp/$T.o \
-	    tmp/arm.v5a-linux.elf-upxfd_android.o
+	    tmp/arm.v5a-linux.elf-upxfd_android.o \
+	    tmp/arm.v5a-linux.elf-upxfd_linux.o
 	$(call tc,f-embed_objinfo_without_xstrip,tmp/$T.bin)
 	$(call tc,bin2h) tmp/$T.bin $@

 arm.v5a-linux.elf-so_entry.h : src/arm.v5a-linux.elf-so_entry.lds \
 	    $(srcdir)/src/$$T.S \
-	    tmp/arm.v5a-linux.elf-upxfd_android.o
+	    tmp/arm.v5a-linux.elf-upxfd_android.o \
+	    tmp/arm.v5a-linux.elf-upxfd_linux.o
 	$(call tc,gcc) -c  $(srcdir)/src/$T.S -o tmp/$T.o
 	multiarch-ld-2.17 -r --format=elf32-littlearm -Map tmp/$T.map -o tmp/$T.bin \
 	    -T src/arm.v5a-linux.elf-so_entry.lds \
 	    tmp/$T.o \
-	    tmp/arm.v5a-linux.elf-upxfd_android.o
+	    tmp/arm.v5a-linux.elf-upxfd_android.o \
+	    tmp/arm.v5a-linux.elf-upxfd_linux.o
 	$(call tc,f-embed_objinfo_without_xstrip,tmp/$T.bin)
 	$(call tc,bin2h) tmp/$T.bin $@

@ -695,9 +710,15 @@ tmp/arm.v5a-linux.elf-upxfd_android.o : $(srcdir)/src/upxfd_android.c
 	$(call tc,objcopy) -R .comment $@
 	$(call tc,objdump) -Dr $(tc_objdump_disasm_options) $@ | $(RTRIM) > $@.disasm

+tmp/arm.v5a-linux.elf-upxfd_linux.o : $(srcdir)/src/upxfd_linux.c
+	$(call tc,gcc) -c -O $< -o $@
+	$(call tc,objcopy) -R .comment $@
+	$(call tc,objdump) -Dr $(tc_objdump_disasm_options) $@ | $(RTRIM) > $@.disasm
+
 arm.v5a-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
 	    tmp/$$T.o \
 	    tmp/arm.v5a-linux.elf-upxfd_android.o \
+	    tmp/arm.v5a-linux.elf-upxfd_linux.o \
 	    tmp/arm.v5a-expand.o \
 	    tmp/arm.v5a-linux.elf-main2.o
 	$(call tc,ld) -r -T $(srcdir)/src/$T.lds -Map tmp/$T.map $(filter %.o,$^) -o tmp/$T.bin
@ -707,6 +728,7 @@ arm.v5a-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
 arm.v5a-linux.elf-so_fold.h : $(srcdir)/src/$$T.lds \
 	    tmp/$$T.o \
 	    tmp/arm.v5a-linux.elf-upxfd_android.o \
+	    tmp/arm.v5a-linux.elf-upxfd_linux.o \
 	    tmp/arm.v5a-expand.o \
 	    tmp/arm.v5a-linux.elf-so_main.o
 	multiarch-ld-2.23.90 -r -T $(srcdir)/src/$T.lds -Map tmp/$T.map $(filter %.o,$^) -o tmp/$T.bin
@ -895,18 +917,21 @@ tc.armeb.v4a-linux.elf.gcc = $(tc.arm.v4a-linux.elf.gcc) -mbig-endian -DBIG_ENDI

 armeb.v4a-linux.elf-entry.h : $(srcdir)/src/armeb.v4a-linux.elf-entry.lds \
 	    $(srcdir)/src/$$T.S \
-	    tmp/armeb.v4a-linux.elf-upxfd_android.o
+	    tmp/armeb.v4a-linux.elf-upxfd_android.o \
+	    tmp/armeb.v4a-linux.elf-upxfd_linux.o
 	$(call tc,gcc) -c  $(srcdir)/src/$T.S -o tmp/$T.o
 	multiarch-ld-2.17 -r --format=elf32-bigarm -Map tmp/$T.map -o tmp/$T.bin \
 	    -T src/armeb.v4a-linux.elf-entry.lds \
 	    tmp/$T.o \
-	    tmp/armeb.v4a-linux.elf-upxfd_android.o
+	    tmp/armeb.v4a-linux.elf-upxfd_android.o \
+	    tmp/armeb.v4a-linux.elf-upxfd_linux.o
 	$(call tc,f-embed_objinfo_without_xstrip,tmp/$T.bin)
 	$(call tc,bin2h) tmp/$T.bin $@

 armeb.v4a-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
 	    tmp/$$T.o \
 	    tmp/armeb.v4a-linux.elf-upxfd_android.o \
+	    tmp/armeb.v4a-linux.elf-upxfd_linux.o \
 	    tmp/armeb.v4a-expand.o \
 	    tmp/armeb.v4a-linux.elf-main2.o
 	$(call tc,ld) -r -T $(srcdir)/src/$T.lds -Map tmp/$T.map $(filter %.o,$^) -o tmp/$T.bin
@ -918,6 +943,11 @@ tmp/armeb.v4a-linux.elf-upxfd_android.o : $(srcdir)/src/upxfd_android.c
 	$(call tc,objcopy) -R .comment $@
 	$(call tc,objdump) -Dr $(tc_objdump_disasm_options) $@ | $(RTRIM) > $@.disasm

+tmp/armeb.v4a-linux.elf-upxfd_linux.o : $(srcdir)/src/upxfd_linux.c
+	$(call tc,gcc) -c -O $< -o $@
+	$(call tc,objcopy) -R .comment $@
+	$(call tc,objdump) -Dr $(tc_objdump_disasm_options) $@ | $(RTRIM) > $@.disasm
+
 tmp/armeb.v4a-expand.o: $(srcdir)/src/$$T.S
 	$(call tc,gcc) -c $< -o $@

@ -1267,34 +1297,44 @@ tc.i386-linux.elf.gcc     += -fweb

 i386-linux.elf-entry.h : $(srcdir)/src/i386-linux.elf-entry.lds \
 	    $(srcdir)/src/$$T.S \
-	    tmp/i386-linux.elf-upxfd_android.o
+	    tmp/i386-linux.elf-upxfd_android.o \
+	    tmp/i386-linux.elf-upxfd_linux.o
 	$(call tc,gcc) -c  $(srcdir)/src/$T.S -o tmp/$T.o
 	multiarch-ld-2.17 -r -Map tmp/$T.map -o tmp/$T.bin \
 	    -T src/i386-linux.elf-entry.lds \
 	    tmp/$T.o \
-	    tmp/i386-linux.elf-upxfd_android.o
+	    tmp/i386-linux.elf-upxfd_android.o \
+	    tmp/i386-linux.elf-upxfd_linux.o
 	$(call tc,f-embed_objinfo_without_xstrip,tmp/$T.bin)
 	$(call tc,bin2h) tmp/$T.bin $@

 i386-linux.elf-so_entry.h : $(srcdir)/src/i386-linux.elf-so_entry.lds \
 	    $(srcdir)/src/$$T.S \
-	    tmp/i386-linux.elf-upxfd_android.o
+	    tmp/i386-linux.elf-upxfd_android.o \
+	    tmp/i386-linux.elf-upxfd_linux.o
 	$(call tc,gcc) -c  $(srcdir)/src/$T.S -o tmp/$T.o
 	multiarch-ld-2.17 -r -Map tmp/$T.map -o tmp/$T.bin \
 	    -T src/i386-linux.elf-so_entry.lds \
 	    tmp/$T.o \
-	    tmp/i386-linux.elf-upxfd_android.o
+	    tmp/i386-linux.elf-upxfd_android.o \
+	    tmp/i386-linux.elf-upxfd_linux.o
 	$(call tc,f-embed_objinfo_without_xstrip,tmp/$T.bin)
 	$(call tc,bin2h) tmp/$T.bin $@

 tmp/i386-linux.elf-upxfd_android.o : $(srcdir)/src/upxfd_android.c
 	$(call tc,gcc) -c -O $< -o $@
-	$(call tc,objcopy) -R .comment $@
+	$(call tc,objcopy) --rename-section .text=UMF_ANDROID -R .comment -R .data -R .bss -R .note.GNU-stack $@
+	$(call tc,objdump) -Dr $(tc_objdump_disasm_options) $@ | $(RTRIM) > $@.disasm
+
+tmp/i386-linux.elf-upxfd_linux.o : $(srcdir)/src/upxfd_linux.c
+	$(call tc,gcc) -c -O $< -o $@
+	$(call tc,objcopy) --rename-section .text=UMF_LINUX -R .comment -R .data -R .bss -R .note.GNU-stack $@
 	$(call tc,objdump) -Dr $(tc_objdump_disasm_options) $@ | $(RTRIM) > $@.disasm

 i386-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
 	    tmp/$$T.o \
 	    tmp/i386-linux.elf-upxfd_android.o \
+	    tmp/i386-linux.elf-upxfd_linux.o \
 	    tmp/i386-expand.o \
 	    tmp/i386-linux.elf-main2.o
 	$(call tc,ld) -r -T $(srcdir)/src/$T.lds -Map tmp/$T.map $(filter %.o,$^) -o tmp/$T.bin
@ -1305,6 +1345,7 @@ i386-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
 i386-linux.elf-so_fold.h : $(srcdir)/src/$$T.lds \
 	    tmp/$$T.o \
 	    tmp/i386-linux.elf-upxfd_android.o \
+	    tmp/i386-linux.elf-upxfd_linux.o \
 	    tmp/i386-expand.o \
 	    tmp/i386-linux.elf-so_main.o
 	$(call tc,ld) -r -T $(srcdir)/src/$T.lds -Map tmp/$T.map $(filter %.o,$^) -o tmp/$T.bin
--- a/src/stub/src/amd64-linux.elf-fold.lds
+++ b/src/stub/src/amd64-linux.elf-fold.lds
@ -30,9 +30,8 @@

 OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
 OUTPUT_ARCH(i386:x86-64)
-/*ENTRY(_start)*/

 SECTIONS
 {
-  . = 0x00100000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
+  . = SIZEOF_HEADERS;
 }
--- a/src/stub/src/amd64-linux.elf-so_fold.lds
+++ b/src/stub/src/amd64-linux.elf-so_fold.lds
@ -11,46 +11,8 @@
 */
 OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
 OUTPUT_ARCH(i386:x86-64)
-/*
-multiarch-ld-2.17 --strip-all \
-    -T ./src/amd64-linux.elf-so_fold.lds \
-    -Map tmp/amd64-linux.elf-so_fold.map \
-       tmp/amd64-linux.elf-so_fold.o \
-       tmp/amd64-linux.elf-so_main.o \
-       tmp/amd64-linux.elf-entry.o \
-    -o tmp/amd64-linux.elf-so_fold.bin
-*/

 SECTIONS
 {
-  . = 0x00100000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
-/*SO_HEAD : { *(SO_HEAD) }*/
-/*
-  .text           :
-  {
-    *(.text.unlikely .text.*_unlikely .text.unlikely.*)
-    *(.text.exit .text.exit.*)
-    *(.text.startup .text.startup.*)
-    *(.text.hot .text.hot.*)
-    *(.text .stub .text.* .gnu.linkonce.t.*)
-    *(NRV_HEAD)
-    *(NRV2B)
-    *(NRV2E)
-    *(NRV2D)
-    *(NRV_TAIL)
-    *(LZMA*)
-    *(SO_MAIN)
-    *(SO_TAIL)
-  }
-  .data           :
-  {
-    *(.data .data.* .gnu.linkonce.d.*)
-  }
-  .data1          : { *(.data1) }
-  .bss            :
-  {
-   *(.bss .bss.* .gnu.linkonce.b.*)
-   *(COMMON)
-  }
-*/
+  . = SIZEOF_HEADERS;
 }
--- a/src/stub/src/arm.v4a-linux.elf-entry.lds
+++ b/src/stub/src/arm.v4a-linux.elf-entry.lds
@ -3,7 +3,6 @@ OUTPUT_ARCH(arm)

 SECTIONS
 {
-  . = 0x00100000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
  .text : {
  }
  ELFMAINX : {
--- a/src/stub/src/arm.v4a-linux.elf-fold.lds
+++ b/src/stub/src/arm.v4a-linux.elf-fold.lds
@ -33,5 +33,5 @@ OUTPUT_ARCH(arm)

 SECTIONS
 {
-  . = 0x00100000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
+  . = SIZEOF_HEADERS;
 }
--- a/src/stub/src/arm.v4a-linux.elf-so_entry.lds
+++ b/src/stub/src/arm.v4a-linux.elf-so_entry.lds
@ -3,7 +3,6 @@ OUTPUT_ARCH(arm)

 SECTIONS
 {
-  . = 0x00100000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
  .text : {
  }
  ELFMAINX : {
--- a/src/stub/src/arm.v4a-linux.elf-so_fold.lds
+++ b/src/stub/src/arm.v4a-linux.elf-so_fold.lds
@ -1,10 +1,7 @@
-OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
 OUTPUT_ARCH(arm)

 SECTIONS
 {
-  SO_HEAD : {
-    *(SO_HEAD)
-    *(.text)
-  }
+  . = SIZEOF_HEADERS;
 }
--- a/src/stub/src/arm.v5a-linux.elf-entry.lds
+++ b/src/stub/src/arm.v5a-linux.elf-entry.lds
@ -3,7 +3,6 @@ OUTPUT_ARCH(arm)

 SECTIONS
 {
-  . = 0x00100000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
  .text : {
  }
  ELFMAINX : {
--- a/src/stub/src/arm.v5a-linux.elf-fold.lds
+++ b/src/stub/src/arm.v5a-linux.elf-fold.lds
@ -30,19 +30,8 @@

 OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
-/*ENTRY(_start)*/
-PHDRS
-{
-    text PT_LOAD FILEHDR PHDRS ;
-    data PT_LOAD ;  /* for setting brk(0) */
-}
+
 SECTIONS
 {
-/*  . = 0x00100000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
-  .text : {
-    *(.text)
-    *(.data)
-  } : text
-  .data : {
-  } : data
+  . = SIZEOF_HEADERS;
 }
--- a/src/stub/src/arm.v5a-linux.elf-so_entry.lds
+++ b/src/stub/src/arm.v5a-linux.elf-so_entry.lds
@ -3,7 +3,6 @@ OUTPUT_ARCH(arm)

 SECTIONS
 {
-  . = 0x00100000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
  .text : {
  }
  ELFMAINX : {
--- a/src/stub/src/arm.v5a-linux.elf-so_fold.lds
+++ b/src/stub/src/arm.v5a-linux.elf-so_fold.lds
@ -1,10 +1,7 @@
-OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
 OUTPUT_ARCH(arm)

 SECTIONS
 {
-  SO_HEAD : {
-    *(SO_HEAD)
-    *(.text)
-  }
+  . = SIZEOF_HEADERS;
 }
--- a/src/stub/src/arm64-linux.elf-fold.lds
+++ b/src/stub/src/arm64-linux.elf-fold.lds
@ -30,7 +30,19 @@

 OUTPUT_FORMAT("elf64-littleaarch64", "elf64-bigaarch64", "elf64-littleaarch64")
 OUTPUT_ARCH(aarch64)
+
+PHDRS
+{
+    text PT_LOAD FILEHDR PHDRS FLAGS ( 5 ) ;  /* r-x (no -w-) */
+    data PT_LOAD ;  /* for setting brk(0) */
+}
 SECTIONS
 {
-    . = SIZEOF_HEADERS + 12 ;
+  . = SIZEOF_HEADERS;
+  .text : {
+    *(.text)
+    *(.data)
+  } : text
+  .data : {
+  } : data
 }
--- a/src/stub/src/arm64-linux.elf-so_fold.lds
+++ b/src/stub/src/arm64-linux.elf-so_fold.lds
@ -3,5 +3,5 @@ OUTPUT_ARCH(aarch64)

 SECTIONS
 {
-  . = SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
+  . = SIZEOF_HEADERS;
 }
--- a/src/stub/src/armeb.v4a-linux.elf-entry.lds
+++ b/src/stub/src/armeb.v4a-linux.elf-entry.lds
@ -3,7 +3,6 @@ OUTPUT_ARCH(arm)

 SECTIONS
 {
-  . = 0x00100000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
  .text : {
  }
  ELFMAINX : {
--- a/src/stub/src/armeb.v4a-linux.elf-fold.lds
+++ b/src/stub/src/armeb.v4a-linux.elf-fold.lds
@ -28,10 +28,10 @@
 */


-OUTPUT_FORMAT("elf32-bigarm", "elf32-bigarm", "elf32-littlearm")
+OUTPUT_FORMAT("elf32-bigarm", "elf32-bigarm", "elf32-bigarm")
 OUTPUT_ARCH(arm)

 SECTIONS
 {
-  . = 0x00100000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
+  . = SIZEOF_HEADERS;
 }
--- a/src/stub/src/i386-bsd.elf-fold.lds
+++ b/src/stub/src/i386-bsd.elf-fold.lds
@ -31,6 +31,7 @@
 OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
 OUTPUT_ARCH(i386)
 /*ENTRY(_start)*/
+
 PHDRS
 {
    text PT_LOAD FILEHDR PHDRS ;
@ -38,7 +39,7 @@ PHDRS
 }
 SECTIONS
 {
-  . = 0x00c01000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
+  . = SIZEOF_HEADERS;
  .text : {
    *(.text)
    *(.data)
--- a/src/stub/src/i386-linux.elf-fold.lds
+++ b/src/stub/src/i386-linux.elf-fold.lds
@ -30,9 +30,8 @@

 OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
 OUTPUT_ARCH(i386)
-/*ENTRY(_start)*/

 SECTIONS
 {
-    . = 0x00100000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
+  . = SIZEOF_HEADERS;
 }
--- a/src/stub/src/i386-linux.elf-so_entry.lds
+++ b/src/stub/src/i386-linux.elf-so_entry.lds
@ -3,7 +3,6 @@ OUTPUT_ARCH(i386)

 SECTIONS
 {
-  . = 0x00100000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
  .text : {
  }
  ELFMAINX : {
--- a/src/stub/src/i386-linux.elf-so_fold.lds
+++ b/src/stub/src/i386-linux.elf-so_fold.lds
@ -1,10 +1,6 @@
 OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
 OUTPUT_ARCH(i386)
-
 SECTIONS
 {
-  SO_HEAD : {
-    *(SO_HEAD)
-    *(.text)
-  }
+  . = SIZEOF_HEADERS;
 }
--- a/src/stub/src/i386-linux.elf.execve-fold.lds
+++ b/src/stub/src/i386-linux.elf.execve-fold.lds
@ -30,7 +30,7 @@

 OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
 OUTPUT_ARCH(i386)
-/*ENTRY(_start)*/
+
 PHDRS
 {
  phdr0 PT_LOAD FILEHDR PHDRS FLAGS(5);  /* no PF_W: strict SELinux, PaX, grSecurity */
@ -39,7 +39,7 @@ PHDRS

 SECTIONS
 {
-  . = 0x00401000 + SIZEOF_HEADERS + 12;  /* 12==sizeof(l_info) */
+  . = SIZEOF_HEADERS;
  .data : { /* put everything together in one Phdr */
    *(.text)
    *(.rodata)
--- a/src/stub/src/i386-linux.elf.interp-fold.lds
+++ b/src/stub/src/i386-linux.elf.interp-fold.lds
@ -30,7 +30,7 @@

 OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
 OUTPUT_ARCH(i386)
-/*ENTRY(_start)*/
+
 PHDRS  /* force exactly 1 ELF32_Phdr: in particular, no PT_GNU_STACK */
 {
  phdr0 PT_LOAD FILEHDR PHDRS FLAGS(5);  /* no PF_W */
@ -39,7 +39,7 @@ PHDRS  /* force exactly 1 ELF32_Phdr: in particular, no PT_GNU_STACK */

 SECTIONS
 {
-  . = 0x10000 + SIZEOF_HEADERS;
+  . = SIZEOF_HEADERS;
  .text : { /* put everything together in one Phdr */
    *(.text)
    *(.rodata)
--- a/src/stub/src/i386-linux.elf.shell-fold.lds
+++ b/src/stub/src/i386-linux.elf.shell-fold.lds
@ -30,7 +30,7 @@

 OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
 OUTPUT_ARCH(i386)
-/*ENTRY(_start)*/
+
 PHDRS
 {
  phdr0 PT_LOAD FILEHDR PHDRS FLAGS(5);  /* no PF_W: strict SELinux, PaX, grSecurity */
@ -39,8 +39,7 @@ PHDRS

 SECTIONS
 {
-  /*  0x01400000: avoid 0x01000000 for shell itself being compressed */
-  . = 0x01400000 + SIZEOF_HEADERS;
+  . = SIZEOF_HEADERS;
  . = ALIGN(0x80);
  .data : { /* put everything together in one Phdr */
    *(.text)
--- a/src/stub/src/mips.r3000-linux.elf-fold.lds
+++ b/src/stub/src/mips.r3000-linux.elf-fold.lds
@ -30,14 +30,15 @@

 OUTPUT_FORMAT("elf32-bigmips", "elf32-bigmips", "elf32-bigmips")
 OUTPUT_ARCH(mips)
-/*ENTRY(_start)*/
+
 PHDRS
 {
    text PT_LOAD FILEHDR PHDRS ;
-    data PT_LOAD ;
+    data PT_LOAD ;  /* for setting brk(0) */
 }
 SECTIONS
 {
+  . = SIZEOF_HEADERS;
  .text : {
    *(.text)
    *(.data)
--- a/src/stub/src/mipsel.r3000-linux.elf-fold.lds
+++ b/src/stub/src/mipsel.r3000-linux.elf-fold.lds
@ -30,14 +30,15 @@

 OUTPUT_FORMAT("elf32-littlemips", "elf32-bigmips", "elf32-littlemips")
 OUTPUT_ARCH(mips)
-/*ENTRY(_start)*/
+
 PHDRS
 {
    text PT_LOAD FILEHDR PHDRS ;
-    data PT_LOAD ;
+    data PT_LOAD ;  /* for setting brk(0) */
 }
 SECTIONS
 {
+  . = SIZEOF_HEADERS;
  .text : {
    *(.text)
    *(.data)
--- a/src/stub/src/powerpc-linux.elf-fold.lds
+++ b/src/stub/src/powerpc-linux.elf-fold.lds
@ -30,14 +30,15 @@

 OUTPUT_FORMAT("elf32-powerpc", "elf32-powerpc", "elf32-powerpc")
 OUTPUT_ARCH(powerpc:common)
-/*ENTRY(_start)*/
+
 PHDRS
 {
    text PT_LOAD FILEHDR PHDRS ;
-    data PT_LOAD ;
+    data PT_LOAD ;  /* for setting brk(0) */
 }
 SECTIONS
 {
+  . = SIZEOF_HEADERS;
  .text : {
    *(.text)
    *(.data)
--- a/src/stub/src/powerpc64-linux.elf-fold.lds
+++ b/src/stub/src/powerpc64-linux.elf-fold.lds
@ -30,7 +30,7 @@

 OUTPUT_FORMAT("elf64-powerpc", "elf64-powerpc", "elf64-powerpc")
 OUTPUT_ARCH(powerpc:common64)
-/*ENTRY(_start)*/
+
 PHDRS
 {
    text PT_LOAD FILEHDR PHDRS ;
@ -38,6 +38,7 @@ PHDRS
 }
 SECTIONS
 {
+  . = SIZEOF_HEADERS;
  .text : {
    *(.text)
    *(.data)
--- a/src/stub/src/powerpc64le-linux.elf-fold.lds
+++ b/src/stub/src/powerpc64le-linux.elf-fold.lds
@ -30,7 +30,7 @@

 OUTPUT_FORMAT("elf64-powerpcle", "elf64-powerpcle", "elf64-powerpcle")
 OUTPUT_ARCH(powerpc:common64)
-/*ENTRY(_start)*/
+
 PHDRS
 {
    text PT_LOAD FILEHDR PHDRS ;
@ -38,6 +38,7 @@ PHDRS
 }
 SECTIONS
 {
+  . = SIZEOF_HEADERS;
  .text : {
    *(.text)
    *(.data)
--- a/src/stub/src/upxfd_linux.c
+++ b/src/stub/src/upxfd_linux.c
@ -0,0 +1,52 @@
+/* upxfd_create.c -- workaround for 32-bit Android
+
+   This file is part of the UPX executable compressor.
+
+   Copyright (C) 2023 John F. Reiser
+   All Rights Reserved.
+ */
+
+#include "include/linux.h"  // syscall decls; i386 inlines via "int 0x80"
+#define MFD_EXEC 0x10
+//#define O_RDWR 2
+#define O_DIRECTORY 0200000  /* 0x010000 asm-generic/fcntl.h */
+#define O_TMPFILE 020000000  /* 0x400000 asm-generic/fcntl.h */
+#define EINVAL 22 /* asm-generic/errno-base.h */
+// Implementation for Linux-native, where memfd_create
+// (or /dev/shm) works.  Saves space in contrast to
+// upxfd_android (or Android emulator), which must
+// fall back to  /data/data/$APP_NAME/cache/upxAAA ,
+// and also must work around inconsistent __NR_ftruncate.
+// 1. Try memfd_create
+// 2. Try /dev/shm
+unsigned long upx_mmap_and_fd_linux( // returns (mapped_addr | (1+ fd))
+    void *ptr  // desired address
+    , unsigned datlen  // mapped length
+    , char *pathname  // 0 ==> get_upxfn_path()
+)
+{
+    (void)pathname;  // FIXME NYI
+    char str_upx[] = {'u','p','x',0};
+    int fd = memfd_create(str_upx, MFD_EXEC);
+    if (-EINVAL == fd) { // 2024-10-15 MFD_EXEC unknown to ubuntu-20.04
+        fd = memfd_create(str_upx, 0);  // try again
+    }
+    if (fd < 0) { // last chance for Linux
+        char str_dev_shm[] = {'/','d','e','v','/','s','h','m', 0};
+        fd = open(str_dev_shm, O_RDWR | O_DIRECTORY | O_TMPFILE, 0700);
+        if (fd < 0) {
+            return (unsigned long)(long)fd;
+        }
+        // Beware: /dev/shm might limit write() to 8KiB at a time.
+    }
+    int rv = ftruncate(fd, datlen);
+    if (rv < 0) {
+        return (unsigned long)(long)rv;
+    }
+    ptr = mmap(ptr, datlen, PROT_READ|PROT_WRITE,
+        (ptr ? MAP_FIXED : 0)|MAP_SHARED, fd, 0);
+    if (PAGE_MASK <= (unsigned long)ptr) {
+        return (unsigned long)ptr;  // errno
+    }
+    return (unsigned long)ptr + (1+ (unsigned)fd);
+}