diff --git a/src/stub/Makefile b/src/stub/Makefile
index 77f5f141..d107dd0f 100644
--- a/src/stub/Makefile
+++ b/src/stub/Makefile
@@ -591,12 +591,13 @@ arm.v4a-linux.elf-so_entry.h : src/arm.v4a-linux.elf-so_entry.lds \
 
 tmp/arm.v4a-linux.elf-upxfd_android.o : $(srcdir)/src/upxfd_android.c
 	$(call tc,gcc) -c -O $< -o $@
+	$(call tc,objcopy) --rename-section .text=UMF_ANDROID -R .comment -R .data -R .bss -R .note.GNU-stack $@
 	$(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,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
 
 arm.v4a-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
@@ -707,12 +708,12 @@ arm.v5a-linux.elf-so_entry.h : src/arm.v5a-linux.elf-so_entry.lds \
 
 tmp/arm.v5a-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/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,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
 
 arm.v5a-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
@@ -940,12 +941,12 @@ armeb.v4a-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
 
 tmp/armeb.v4a-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/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,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
 
 tmp/armeb.v4a-expand.o: $(srcdir)/src/$$T.S
@@ -1553,19 +1554,27 @@ mips.r3000-linux.elf-entry.h : $(srcdir)/src/mips.r3000-linux.elf-entry.lds \
 tmp/mips.r3000-linux.elf-upxfd_android.o : $(srcdir)/src/upxfd_android.c
 	@echo; echo TARGET: $@; echo
 	$(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/mips.r3000-linux.elf-upxfd_linux.o : $(srcdir)/src/upxfd_linux.c
+	@echo; echo TARGET: $@; echo
+	$(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
 
 mips.r3000-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
 	    $(srcdir)/src/$$T.S \
 	    tmp/mips.r3000-linux.elf-main2.s \
 	    tmp/mips.r3000-linux.upxfd_android.s \
+	    tmp/mips.r3000-linux.upxfd_linux.s \
 	    src/mips.r3000-expand.S
 	@echo; echo TARGET: $@; echo
 	cat > tmp/mips.r3000-linux.elf-fold-2.S \
 	    src/mips.r3000-linux.elf-fold.S \
 	    tmp/mips.r3000-linux.elf-main2.s \
 	    tmp/mips.r3000-linux.upxfd_android.s \
+	    tmp/mips.r3000-linux.upxfd_linux.s \
 	    src/mips.r3000-expand.S
 	(cd tmp; ln -sf ../src/arch arch)
 	$(call tc,gcc) -E \
@@ -1593,6 +1602,17 @@ tmp/mips.r3000-linux.upxfd_android.s: $(srcdir)/src/upxfd_android.c
 	          -e 's/	jal[ 	][ 	]*\([^\$$]\)/	bal \1/' \
 		  >$@
 
+tmp/mips.r3000-linux.upxfd_linux.s: $(srcdir)/src/upxfd_linux.c
+	@echo; echo TARGET: $@; echo
+	$(call tc,gcc) -S -D__mips__ \
+	    -D_TARGET_LINUX_ -DNO_WANT_MMAP -O $< -o - \
+	    | sed -e '/^\t\.file\t/d' \
+	          -e 's/L[0-9]*/L8&/g' \
+	          -e $$(cat src/dollar-dollar.sed) \
+	          -e 's/	j[ 	][ 	]*$$L/	b $$L/' \
+	          -e 's/	jal[ 	][ 	]*\([^\$$]\)/	bal \1/' \
+		  >$@
+
 tmp/mips.r3000-linux.elf-main2.s: $(srcdir)/src/$$T.c $(srcdir)/src/i386-linux.elf-main2.c
 	@echo; echo TARGET: $@; echo
 	$(call tc,gcc) -S -D__mips__ -D_TARGET_LINUX_ -O $< -o - \
@@ -1665,12 +1685,14 @@ mipsel.r3000-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
 	    $(srcdir)/src/$$T.S \
 	    tmp/mipsel.r3000-linux.elf-main2.s \
 	    tmp/mipsel.r3000-linux.upxfd_android.s \
+	    tmp/mipsel.r3000-linux.upxfd_linux.s \
 	    src/mipsel.r3000-expand.S
 	@echo; echo TARGET: $@; echo
 	cat > tmp/mipsel.r3000-linux.elf-fold-2.S \
 	    src/mipsel.r3000-linux.elf-fold.S \
 	    tmp/mipsel.r3000-linux.elf-main2.s \
 	    tmp/mipsel.r3000-linux.upxfd_android.s \
+	    tmp/mipsel.r3000-linux.upxfd_linux.s \
 	    src/mipsel.r3000-expand.S
 	(cd tmp; ln -sf ../src/arch arch)
 	$(call tc,gcc) -E \
@@ -1698,6 +1720,17 @@ tmp/mipsel.r3000-linux.upxfd_android.s: $(srcdir)/src/upxfd_android.c
 	          -e 's/	jal[ 	][ 	]*\([^\$$]\)/	bal \1/' \
 		  >$@
 
+tmp/mipsel.r3000-linux.upxfd_linux.s: $(srcdir)/src/upxfd_linux.c
+	@echo; echo TARGET: $@; echo
+	$(call tc,gcc) -S -D__mipsel__ \
+	    -D_TARGET_LINUX_ -DNO_WANT_MMAP -O $< -o - \
+	    | sed -e '/^\t\.file\t/d' \
+	          -e 's/L[0-9]*/L8&/g' \
+	          -e $$(cat src/dollar-dollar.sed) \
+	          -e 's/	j[ 	][ 	]*$$L/	b $$L/' \
+	          -e 's/	jal[ 	][ 	]*\([^\$$]\)/	bal \1/' \
+		  >$@
+
 tmp/mipsel.r3000-linux.elf-main2.s: $(srcdir)/src/$$T.c $(srcdir)/src/i386-linux.elf-main2.c
 	@echo; echo TARGET: $@; echo
 	$(call tc,gcc) -S -D__mipsel__ -D_TARGET_LINUX_ -O $< -o - \
@@ -1827,7 +1860,7 @@ powerpc-linux.elf-entry.h : $(srcdir)/src/$$T.S
 
 powerpc-linux.elf-fold.h : $(srcdir)/src/$$T.lds \
 	    tmp/$$T.o \
-	    tmp/powerpc-linux.elf-upxfd_android.o \
+	    tmp/powerpc-linux.elf-upxfd_linux.o \
 	    tmp/powerpc-expand.o \
 	    tmp/powerpc-linux.elf-main2.o
 	$(call tc,ld) -r -T $(srcdir)/src/$T.lds -Map tmp/$T.map $(filter %.o,$^) -o tmp/$T.bin
@@ -1842,9 +1875,9 @@ tmp/powerpc-linux.elf-main2.o : $(srcdir)/src/$$T.c
 	$(call tc,gcc) -c $< -o $@
 	$(call tc,f-objstrip,$@)
 
-tmp/powerpc-linux.elf-upxfd_android.o : $(srcdir)/src/upxfd_android.c
+tmp/powerpc-linux.elf-upxfd_linux.o : $(srcdir)/src/upxfd_linux.c
 	$(call tc,gcc) -c -O $< -o $@
-	$(call tc,objcopy) -R .comment $@
+	$(call tc,objcopy) -R .comment -R .data -R .bss -R .note.GNU-stack $@
 	$(call tc,objdump) -Dr $(tc_objdump_disasm_options) $@ | $(RTRIM) > $@.disasm
 
 tmp/powerpc-expand.o: $(srcdir)/src/$$T.S
diff --git a/src/stub/src/arm.v4a-expand.S b/src/stub/src/arm.v4a-expand.S
index 735a5d36..800eac8a 100644
--- a/src/stub/src/arm.v4a-expand.S
+++ b/src/stub/src/arm.v4a-expand.S
@@ -179,6 +179,10 @@ eof:  // end of a compressed extent
     .unreq dst
     .unreq tmp
 
+        .balign 4
+upx_mmap_and_fd: .globl upx_mmap_and_fd
+    // UMF_ANDROID or UMF_LINUX must be loaded after EXP_TAIL
+
 #define M_NRV2B_LE32    2
 #define M_NRV2B_8    3
 #define M_NRV2D_LE32    5
diff --git a/src/stub/src/arm.v4a-linux.elf-entry.S b/src/stub/src/arm.v4a-linux.elf-entry.S
index f7b3e451..08367dca 100644
--- a/src/stub/src/arm.v4a-linux.elf-entry.S
+++ b/src/stub/src/arm.v4a-linux.elf-entry.S
@@ -270,6 +270,10 @@ f_expand:
 #define NO_METHOD_CHECK 1
 #include "arch/arm/v4a/nrv2b_d8.S"
 
+        .balign 4
+upx_mmap_and_fd:
+// section UMF_LINUX or UMF_ANDROID goes here
+
   section ELFMAINY
 end_decompress: .globl end_decompress
         /* IDENTSTR goes here */
diff --git a/src/stub/src/mips.r3000-expand.S b/src/stub/src/mips.r3000-expand.S
index cd6d162c..f93b2d63 100644
--- a/src/stub/src/mips.r3000-expand.S
+++ b/src/stub/src/mips.r3000-expand.S
@@ -154,6 +154,10 @@ eof_n2b: .globl eof_n2b
 go_decompr:
 //  sections NRV2B, etc, inserted here by addLoader() from ::buildLinuxLoader()
 
+        .balign 4
+upx_mmap_and_fd: .globl upx_mmap_and_fd
+    // UMF_ANDROID or UMF_LINUX must be loaded after EXP_TAIL
+
   section EXP_TAIL
 #define M_NRV2B_LE32    2
 #define M_NRV2B_8    3
diff --git a/src/stub/src/mipsel.r3000-linux.elf-entry.S b/src/stub/src/mipsel.r3000-linux.elf-entry.S
index 4bf2b8e3..91e7412c 100644
--- a/src/stub/src/mipsel.r3000-linux.elf-entry.S
+++ b/src/stub/src/mipsel.r3000-linux.elf-entry.S
@@ -184,6 +184,11 @@ eof_n2b:
         jr ra
           addiu sp,4
 
+        .balign 4
+upx_mmap_and_fd:
+// section UMF_LINUX or UMF_ANDROID goes here
+
+  section ELFMAINZ
   section ELFMAINZ; .set noreorder
 L72:
         li a0,2  # fd stderr
diff --git a/src/stub/src/powerpc-linux.elf-fold.S b/src/stub/src/powerpc-linux.elf-fold.S
index 48fe11d3..b856e7aa 100644
--- a/src/stub/src/powerpc-linux.elf-fold.S
+++ b/src/stub/src/powerpc-linux.elf-fold.S
@@ -268,6 +268,10 @@ sz_auxv= 2*NBPW
         bctr  // goto escape hatch
 
   section SYSCALLS
+
+upx_mmap_and_fd: .globl upx_mmap_and_fd
+        b upx_mmap_and_fd_linux
+
 SYS_exit=  1
 SYS_fork=  2
 SYS_read=  3
diff --git a/src/stub/src/upxfd_linux.c b/src/stub/src/upxfd_linux.c
index 1550015f..af7ceb08 100644
--- a/src/stub/src/upxfd_linux.c
+++ b/src/stub/src/upxfd_linux.c
@@ -6,6 +6,76 @@
    All Rights Reserved.
  */
 
+#if defined(__i386__) //}{
+#define ANDROID_FRIEND 1
+#define addr_string(string) ({ \
+    char const *str; \
+    asm("call 0f; .asciz \"" string "\"; 0: pop %0" \
+/*out*/ : "=r"(str) ); \
+    str; \
+})
+#elif defined(__arm__) //}{
+#define ANDROID_FRIEND 1
+#define addr_string(string) ({ \
+    char const *str; \
+    asm("bl 0f; .string \"" string "\"; .balign 4; 0: mov %0,lr" \
+/*out*/ : "=r"(str) \
+/* in*/ : \
+/*und*/ : "lr"); \
+    str; \
+})
+#elif defined(__mips__) //}{
+#define ANDROID_FRIEND 0
+#define addr_string(string) ({ \
+    char const *str; \
+    asm("bal 0f; .asciz \"" string "\"; .balign 4\n0: move %0,$31" \
+/*out*/ : "=r"(str) \
+/* in*/ : \
+/*und*/ : "ra"); \
+    str; \
+})
+#elif defined(__powerpc__)  /*}{*/
+#define ANDROID_FRIEND 0
+#define addr_string(string) ({ \
+    char const *str; \
+    asm("bl 0f; .asciz \"" string "\"; .balign 4; 0: mflr %0" \
+/*out*/ : "=r"(str) \
+/* in*/ : \
+/*und*/ : "lr"); \
+    str; \
+})
+#elif defined(__powerpc64__) //}{
+#define ANDROID_FRIEND 0
+#define addr_string(string) ({ \
+    char const *str; \
+    asm("bl 0f; .string \"" string "\"; .balign 4; 0: mflr %0" \
+/*out*/ : "=r"(str) \
+/* in*/ : \
+/*und*/ : "lr"); \
+    str; \
+})
+#elif defined(__x86_64) //}{
+#define ANDROID_FRIEND 0
+#define addr_string(string) ({ \
+    char const *str; \
+    asm("lea 9f(%%rip),%0; .section STRCON; 9:.asciz \"" string "\"; .previous" \
+/*out*/ : "=r"(str) ); \
+    str; \
+})
+#elif defined(__aarch64__) //}{
+#define ANDROID_FRIEND 0
+#define addr_string(string) ({ \
+    char const *str; \
+    asm("bl 0f; .string \"" string "\"; .balign 4; 0: mov %0,x30" \
+/*out*/ : "=r"(str) \
+/* in*/ : \
+/*und*/ : "x30"); \
+    str; \
+})
+#else  //}{
+#define ANDROID_FRIEND 0
+#error  addr_string
+#endif  //}
 #include "include/linux.h"  // syscall decls; i386 inlines via "int 0x80"
 #define MFD_EXEC 0x10
 //#define O_RDWR 2
@@ -26,14 +96,13 @@ unsigned long upx_mmap_and_fd_linux( // returns (mapped_addr | (1+ fd))
 )
 {
     (void)pathname;  // FIXME NYI
-    char str_upx[] = {'u','p','x',0};
-    int fd = memfd_create(str_upx, MFD_EXEC);
+    char const *const name = addr_string("upx");
+    int fd = memfd_create(name, MFD_EXEC);
     if (-EINVAL == fd) { // 2024-10-15 MFD_EXEC unknown to ubuntu-20.04
-        fd = memfd_create(str_upx, 0);  // try again
+        fd = memfd_create(name, 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);
+        fd = open(addr_string("/dev/shm"), O_RDWR | O_DIRECTORY | O_TMPFILE, 0700);
         if (fd < 0) {
             return (unsigned long)(long)fd;
         }