[Bug c/90751] New: -fpatchtable-function-entry broken on hppa-linux-gnu-gcc/hppa64-linux-gnu-gcc

[svens at stackframe dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90751

            Bug ID: 90751
           Summary: -fpatchtable-function-entry  broken on
                    hppa-linux-gnu-gcc/hppa64-linux-gnu-gcc
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: svens at stackframe dot org
  Target Milestone: ---

$ hppa64-linux-gnu-gcc  -fpatchable-function-entry=6,3 test.c -c -o /tmp/test.o

The disassembly shows that it ignores the second argument, and places the
function label wrong:

$ hppa-linux-gnu-objdump -d /tmp/test.o                                    

/tmp/test.o:     file format elf32-hppa-linux


Disassembly of section .text:

00000000 <foo-0x18>:
   0:   08 00 02 40     nop
   4:   08 00 02 40     nop
   8:   08 00 02 40     nop
   c:   08 00 02 40     nop
  10:   08 00 02 40     nop
  14:   08 00 02 40     nop

00000018 <foo>:
  18:   6b c2 3f d9     stw rp,-14(sp)
  1c:   08 03 02 41     copy r3,r1
  20:   08 1e 02 43     copy sp,r3
  24:   6f c1 01 00     stw,ma r1,80(sp)
  28:   34 18 00 20     ldi 10,r24

$ hppa-linux-gnu-gcc -v       
Using built-in specs.
COLLECT_GCC=hppa-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/hppa-linux-gnu/10/lto-wrapper
Target: hppa-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.3.0-4'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs --enable-languages=c
--prefix=/usr --with-gcc-major-version-only --program-suffix=-8 --enable-shared
--enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libssp
--disable-libitm --disable-libsanitizer --disable-libquadmath
--disable-libquadmath-support --enable-plugin --with-system-zlib
--disable-libphobos --enable-multiarch --disable-werror --disable-libstdcxx-pch
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=hppa-linux-gnu --program-prefix=hppa-linux-gnu-
--includedir=/usr/hppa-linux-gnu/include : (reconfigured) ../src/configure -v
--enable-languages=c --prefix=/usr --with-gcc-major-version-only
--enable-shared --enable-linker-build-id --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix --libdir=/usr/lib
--enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new
--enable-gnu-unique-object --disable-libssp --disable-libitm
--disable-libsanitizer --disable-libquadmath --disable-libquadmath-support
--enable-plugin --with-system-zlib --disable-libphobos --enable-multiarch
--disable-werror --disable-libstdcxx-pch --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=hppa-linux-gnu
--program-prefix=hppa-linux-gnu- --includedir=/usr/hppa-linux-gnu/include :
(reconfigured) ../src/configure -v --prefix=/usr --with-gcc-major-version-only
--enable-shared --enable-linker-build-id --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix --libdir=/usr/lib
--enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new
--enable-gnu-unique-object --disable-libssp --disable-libitm
--disable-libsanitizer --disable-libquadmath --disable-libquadmath-support
--enable-plugin --with-system-zlib --disable-libphobos --enable-multiarch
--disable-werror --disable-libstdcxx-pch --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=hppa-linux-gnu
--program-prefix=hppa-linux-gnu- --includedir=/usr/hppa-linux-gnu/include
build_alias=x86_64-linux-gnu host_alias=x86_64-linux-gnu
target_alias=hppa-linux-gnu --enable-languages=c,lto --no-create --no-recursion
Thread model: posix
gcc version 10.0.0 20190604 (experimental) (GCC)