glibc: Fix glibc reproducibility issues

Currently for non-IA platforms, glibc is not reproducible as host system
paths are being injected into target binaries. These spread through
all target binaries on the system which link to the libc.

Add a patch which injects .file directives into the assembly pieces
and works around this issue until a better solution can be found.

(From OE-Core rev: 4d6fd8178da75f9a1870db290bbe24de5af752c9)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 260 insertions, 0 deletions

diff --git a/meta/recipes-core/glibc/glibc/0034-inject-file-assembly-directives.patch b/meta/recipes-core/glibc/glibc/0034-inject-file-assembly-directives.patch
new file mode 100644
index 0000000000..3f9f8cf189
--- /dev/null
+++ b/meta/recipes-core/glibc/glibc/0034-inject-file-assembly-directives.patch
@@ -0,0 +1,259 @@
+Currently, non-IA builds are not reproducibile since build paths are 
+being injected into the debug symbols. These are coming from the use of
+.S assembler files during the glibc build. No STT_FILE section is added
+during the assembly but when linking, ld decides to add one to aid 
+debugging and ensure references between the different object files its
+linking remain clear.
+
+We can avoid this by injecting a file header into the assembler files
+ahead of time, choosing a filename which does not contain build system
+paths.
+
+This is a bit of a workaround/hack but does significantly reduce the
+build system references in target binaries for the non-IA architectures
+which use .S files.
+
+RP
+2018/10/3
+
+Upstream-Status: Pending
+
+diff --git a/csu/abi-note.S b/csu/abi-note.S
+index 5d0ca7803d..8ce41581b1 100644
+--- a/csu/abi-note.S
++++ b/csu/abi-note.S
+@@ -56,6 +56,8 @@ offset        length  contents
+ #include <config.h>
+ #include <abi-tag.h>           /* OS-specific ABI tag value */
+ 
++       .file "abi-note.S"
++
+ /* The linker (GNU ld 2.8 and later) recognizes an allocated section whose
+    name begins with `.note' and creates a PT_NOTE program header entry
+    pointing at it. */
+diff --git a/sysdeps/aarch64/crti.S b/sysdeps/aarch64/crti.S
+index 2b213758b2..736f33e314 100644
+--- a/sysdeps/aarch64/crti.S
++++ b/sysdeps/aarch64/crti.S
+@@ -50,6 +50,8 @@
+ # define PREINIT_FUNCTION_WEAK 1
+ #endif
+ 
++    .file "crti.S"
++
+ #if PREINIT_FUNCTION_WEAK
+        weak_extern (PREINIT_FUNCTION)
+ #else
+diff --git a/sysdeps/aarch64/crtn.S b/sysdeps/aarch64/crtn.S
+index d72300af80..cb249bf3ca 100644
+--- a/sysdeps/aarch64/crtn.S
++++ b/sysdeps/aarch64/crtn.S
+@@ -37,6 +37,8 @@
+ /* crtn.S puts function epilogues in the .init and .fini sections
+    corresponding to the prologues in crti.S. */
+ 
++       .file "crtn.S"
++
+        .section .init,"ax",%progbits
+        ldp     x29, x30, [sp], 16
+        RET
+diff --git a/sysdeps/aarch64/start.S b/sysdeps/aarch64/start.S
+index bad000f555..5957c028cd 100644
+--- a/sysdeps/aarch64/start.S
++++ b/sysdeps/aarch64/start.S
+@@ -18,6 +18,8 @@
+ 
+ #include <sysdep.h>
+ 
++       .file "start.S"
++
+ /* This is the canonical entry point, usually the first thing in the text
+    segment.
+ 
+diff --git a/sysdeps/unix/sysv/linux/aarch64/__read_tp.S b/sysdeps/unix/sysv/linux/aarch64/__read_tp.S
+index 92fc0191a5..715bfcb9e4 100644
+--- a/sysdeps/unix/sysv/linux/aarch64/__read_tp.S
++++ b/sysdeps/unix/sysv/linux/aarch64/__read_tp.S
+@@ -18,6 +18,8 @@
+ 
+ #include <sysdep.h>
+ 
++       .file "__read_tp.S"
++
+        .hidden __read_tp
+ ENTRY (__read_tp)
+        mrs     x0, tpidr_el0
+diff --git a/sysdeps/aarch64/dl-tlsdesc.S b/sysdeps/aarch64/dl-tlsdesc.S
+index 43a62ef307..42f85cdde9 100644
+--- a/sysdeps/aarch64/dl-tlsdesc.S
++++ b/sysdeps/aarch64/dl-tlsdesc.S
+@@ -22,6 +22,8 @@
+ #include <tls.h>
+ #include "tlsdesc.h"
+ 
++       .file "dl-tlsdesc.S"
++
+ #define NSAVEDQREGPAIRS        16
+ #define SAVE_Q_REGISTERS                               \
+        stp     q0, q1, [sp, #-32*NSAVEDQREGPAIRS]!;    \
+diff --git a/sysdeps/aarch64/dl-trampoline.S b/sysdeps/aarch64/dl-trampoline.S
+index a86d0722d4..92edab1d01 100644
+--- a/sysdeps/aarch64/dl-trampoline.S
++++ b/sysdeps/aarch64/dl-trampoline.S
+@@ -21,6 +21,8 @@
+ 
+ #include "dl-link.h"
+ 
++       .file "dl-trampoline.S"
++
+ #define ip0 x16
+ #define ip0l PTR_REG (16)
+ #define ip1 x17
+diff --git a/sysdeps/arm/abi-note.S b/sysdeps/arm/abi-note.S
+index 07bd4c4619..7213b16f27 100644
+--- a/sysdeps/arm/abi-note.S
++++ b/sysdeps/arm/abi-note.S
+@@ -1,3 +1,5 @@
++       .file "abi-note.S"
++
+ /* Tag_ABI_align8_preserved: This code preserves 8-byte
+    alignment in any callee.  */
+        .eabi_attribute 25, 1
+diff --git a/sysdeps/arm/crti.S b/sysdeps/arm/crti.S
+index a1424d0333..bca1dab256 100644
+--- a/sysdeps/arm/crti.S
++++ b/sysdeps/arm/crti.S
+@@ -57,6 +57,8 @@
+        .hidden PREINIT_FUNCTION
+ #endif
+ 
++    .file "crti.S"
++
+ #if PREINIT_FUNCTION_WEAK
+        .p2align 2
+        .type call_weak_fn, %function
+diff --git a/sysdeps/arm/crtn.S b/sysdeps/arm/crtn.S
+index 26027693ce..65a0502826 100644
+--- a/sysdeps/arm/crtn.S
++++ b/sysdeps/arm/crtn.S
+@@ -37,6 +37,8 @@
+ #define NO_THUMB
+ #include <sysdep.h>
+ 
++    .file "crtn.S"
++
+ /* crtn.S puts function epilogues in the .init and .fini sections
+    corresponding to the prologues in crti.S. */
+ 
+diff --git a/sysdeps/arm/dl-tlsdesc.S b/sysdeps/arm/dl-tlsdesc.S
+index 056e17d52d..a98c68dfb9 100644
+--- a/sysdeps/arm/dl-tlsdesc.S
++++ b/sysdeps/arm/dl-tlsdesc.S
+@@ -21,6 +21,8 @@
+ #include <tls.h>
+ #include "tlsdesc.h"
+ 
++       .file "dl-tlsdesc.S"
++
+        .text
+        @ emit debug information with cfi
+        @ use arm-specific pseudos for unwinding itself
+diff --git a/sysdeps/arm/dl-trampoline.S b/sysdeps/arm/dl-trampoline.S
+index c731b01286..4b37b25344 100644
+--- a/sysdeps/arm/dl-trampoline.S
++++ b/sysdeps/arm/dl-trampoline.S
+@@ -21,6 +21,8 @@
+ #include <sysdep.h>
+ #include <libc-symbols.h>
+ 
++       .file "dl-trampoline.S"
++
+        .text
+        .globl _dl_runtime_resolve
+        .type _dl_runtime_resolve, #function
+diff --git a/sysdeps/arm/start.S b/sysdeps/arm/start.S
+index adef090717..d22e4128e0 100644
+--- a/sysdeps/arm/start.S
++++ b/sysdeps/arm/start.S
+@@ -57,6 +57,8 @@
+                                        NULL
+ */
+ 
++       .file "start.S"
++
+ /* Tag_ABI_align8_preserved: This code preserves 8-byte
+    alignment in any callee.  */
+        .eabi_attribute 25, 1
+diff --git a/sysdeps/unix/sysv/linux/arm/aeabi_read_tp.S b/sysdeps/unix/sysv/linux/arm/aeabi_read_tp.S
+index 871702317a..20a942dbac 100644
+--- a/sysdeps/unix/sysv/linux/arm/aeabi_read_tp.S
++++ b/sysdeps/unix/sysv/linux/arm/aeabi_read_tp.S
+@@ -39,6 +39,8 @@
+    a normal function call) in a high page of memory; tail call to the
+    helper.  */
+ 
++       .file "aeabi_read_tp.S"
++
+        .hidden __aeabi_read_tp
+ ENTRY (__aeabi_read_tp)
+ #ifdef ARCH_HAS_HARD_TP
+diff --git a/sysdeps/mips/start.S b/sysdeps/mips/start.S
+index a4c4ef0fae..d00fff31a8 100644
+--- a/sysdeps/mips/start.S
++++ b/sysdeps/mips/start.S
+@@ -38,6 +38,8 @@
+ #include <sgidefs.h>
+ #include <sys/asm.h>
+ 
++       .file "start.S"
++
+ #ifndef ENTRY_POINT
+ #error ENTRY_POINT needs to be defined for start.S on MIPS/ELF.
+ #endif
+diff --git a/sysdeps/unix/sysv/linux/powerpc/dl-brk.S b/sysdeps/unix/sysv/linux/powerpc/dl-brk.S
+index eeb96544e3..da182b28f8 100644
+--- a/sysdeps/unix/sysv/linux/powerpc/dl-brk.S
++++ b/sysdeps/unix/sysv/linux/powerpc/dl-brk.S
+@@ -1 +1,3 @@
++       .file "dl-brk.S"
++
+ #include <brk.S>
+diff --git a/sysdeps/powerpc/powerpc32/start.S b/sysdeps/powerpc/powerpc32/start.S
+index 5c10a22f8a..2b52627f27 100644
+--- a/sysdeps/powerpc/powerpc32/start.S
++++ b/sysdeps/powerpc/powerpc32/start.S
+@@ -35,6 +35,8 @@
+ 
+ #include <sysdep.h>
+ 
++       .file "start.S"
++
+ /* We do not want .eh_frame info for crt1.o since crt1.o is linked
+    before crtbegin.o, the file defining __EH_FRAME_BEGIN__.  */
+ #undef cfi_startproc
+diff --git a/sysdeps/powerpc/powerpc64/start.S b/sysdeps/powerpc/powerpc64/start.S
+index bd7189310c..2e22b8472d 100644
+--- a/sysdeps/powerpc/powerpc64/start.S
++++ b/sysdeps/powerpc/powerpc64/start.S
+@@ -35,6 +35,8 @@
+ 
+ #include <sysdep.h>
+ 
++       .file "start.S"
++
+ /* We do not want .eh_frame info for crt1.o since crt1.o is linked
+    before crtbegin.o, the file defining __EH_FRAME_BEGIN__.  */
+ #undef cfi_startproc
+diff --git a/sysdeps/powerpc/powerpc32/dl-start.S b/sysdeps/powerpc/powerpc32/dl-start.S
+index 244d87fb6d..14d3e2ce14 100644
+--- a/sysdeps/powerpc/powerpc32/dl-start.S
++++ b/sysdeps/powerpc/powerpc32/dl-start.S
+@@ -18,6 +18,8 @@
+ 
+ #include <sysdep.h>
+ 
++       .file "dl-start.S"
++
+ /* Initial entry point code for the dynamic linker.
+    The C function `_dl_start' is the real entry point;
+    its return value is the user program's entry point. */
diff --git a/meta/recipes-core/glibc/glibc_2.28.bb b/meta/recipes-core/glibc/glibc_2.28.bb
index bd8b51e1d6..d072939254 100644
--- a/meta/recipes-core/glibc/glibc_2.28.bb
+++ b/meta/recipes-core/glibc/glibc_2.28.bb
@@ -48,6 +48,7 @@ SRC_URI = "${GLIBC_GIT_URI};branch=${SRCBRANCH};name=glibc \
            file://0031-sysdeps-ieee754-prevent-maybe-uninitialized-errors-w.patch \
            file://0032-sysdeps-ieee754-soft-fp-ignore-maybe-uninitialized-w.patch \
            file://0033-locale-prevent-maybe-uninitialized-errors-with-Os-BZ.patch \
+           file://0034-inject-file-assembly-directives.patch \
 "
 
 NATIVESDKFIXES ?= ""