Refactor sigcontextinfo.h

This patch refactor sigcontextinfo.h header to use SA_SIGINFO as default
for both gmon and debug implementations.  This allows simplify
profil-counter.h on Linux to use a single implementation and remove the
requirements for newer ports to redefine __sigaction/sigaction to use
SA_SIGINFO.

The GET_PC macro is also replaced with a function sigcontext_get_pc that
returns an uintptr_t instead of a void pointer.  It allows easier convertion
to integer on ILP32 architecture, such as x32, without the need to suppress
compiler warnings.

The patch also requires some refactor of register-dump.h file for some
architectures (to reflect it is now called from a sa_sigaction instead of
sa_handler signal context).

   - Alpha, i386, and s390 are straighfoward to take in consideration the
     new argument type.

   - ia64 takes in consideration the kernel pass a struct sigcontextt
     as third argument for sa_sigaction.

   - sparc take in consideration the kernel pass a pt_regs struct
     as third argument for sa_sigaction.

   - m68k dummy function is removed and the FP state is dumped on
     register_dump itself.

   - For SH the register-dump.h file is consolidate on a common implementation
     and the floating-point state is checked based on ownedfp field.

The register_dump does not change its output format in any affected
architecture.

I checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu,
arm-linux-gnueabihf, sparcv9-linux-gnu, sparc64-linux-gnu, powerpc-linux-gnu,
powerpc64-linux-gnu, and powerpc64le-linux-gnu.

I also checked the libSegFault.so through catchsegv on alpha-linux-gnu,
m68k-linux-gnu and sh4-linux-gnu to confirm the output has not changed.

	Adhemerval Zanella  <adhemerval.zanella@linaro.org>
	Florian Weimer  <fweimer@redhat.com>

	* debug/segfault.c (install_handler): Use SA_SIGINFO if defined.
	* sysdeps/generic/profil-counter.h (__profil_counter): Cast to
	uintptr_t.
	* sysdeps/generic/sigcontextinfo.h (GET_PC): Rename to
	sigcontext_get_pc and return aligned cast to uintptr_t.
	* sysdeps/mach/hurd/i386/sigcontextinfo.h (GET_PC): Likewise.
	* sysdeps/posix/profil.c (profil_count): Change PC argument to
	uintptr_t.
	(__profil): Use SA_SIGINFO.
	* sysdeps/posix/sprofil.c (profil_count): Change PCP argument to
	uintptr_t.
	(__sprofil): Use SA_SIGINFO.
	* sysdeps/unix/sysv/linux/profil-counter.h: New file.
	* sysdeps/unix/sysv/linux/aarch64/profil-counter.h: Remove file.
	* sysdeps/unix/sysv/linux/csky/profil-counter.h: Likewise.
	* sysdeps/unix/sysv/linux/hppa/profil-counter.h: Likewise.
	* sysdeps/unix/sysv/linux/i386/profil-counter.h: Likewise.
	* sysdeps/unix/sysv/linux/ia64/profil-counter.h: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/profil-counter.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/profil-counter.h: Likewise.
	* sysdeps/unix/sysv/linux/nios2/profil-counter.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/profil-counter.h: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/profil-counter.h: Likewise.
	* sysdeps/unix/sysv/linux/riscv/profil-counter.h: Likewise.
	* sysdeps/sysv/linux/s390/s390-32/profil-counter.h: Likewise.
	* sysdeps/sysv/linux/s390/s390-64/profil-counter.h: Likewise.
	* sysdeps/unix/sysv/linux/sh/profil-counter.h: Likewise.
	* sysdeps/unix/sysv/linux/arm/profil-counter.h (__profil_counter):
	Assume SA_SIGINFO and use sigcontext_get_pc instead of GET_PC.
	* sysdeps/unix/sysv/linux/sparc/profil-counter.h: New file.
	* sysdeps/unix/sysv/linux/sparc/sparc64/profil-counter.h: Remove file.
	* sysdeps/unix/sysv/linux/sparc/sparc32/profil-counter.h: Likewise.
	* sysdpes/unix/sysv/linux/aarch64/sigcontextinfo.h (SIGCONTEXT,
	GET_PC, __sigaction, sigaction): Remove defines.
	(sigcontext_get_pc): New function.
	* sysdeps/unix/sysv/linux/alpha/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/arm/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/csky/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/hppa/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/i386/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/ia64/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/nios2/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/riscv/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/sh/sigcontextinfo.h: Likewise.
	* sysdeps/sysv/linux/sparc/sparc32/sigcontextinfo.h: Likewise.
	* sysdeps/sysv/linux/sparc/sparc64/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sigcontextinfo.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/register-dump.h (register_dump):
	Handle CTX argument as ucontext_t.
	* sysdeps/unix/sysv/linux/i386/register-dump.h: Likewise.
	Likewise.
	* sysdeps/unix/sysv/linux/m68k/register-dump.h: Likewise.
	* sysdeps/sysv/linux/s390/s390-32/register-dump.h: Likewise.
	* sysdeps/sysv/linux/s390/s390-64/register-dump.h: Likewise.
	* sysdeps/unix/sysv/linux/sh/register-dump.h: New file.
	* sysdeps/unix/sysv/linux/sh/sh4/register-dump.h: Remove File.
	* sysdeps/unix/sysv/linux/sh/sh3/register-dump.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/register-dump.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/register-dump.h: Likewise.
	* sysdeps/unix/sysv/linux/Makefile (tests-internal): Add
	tst-sigcontextinfo-get_pc.
	* sysdeps/unix/sysv/linux/tst-sigcontextinfo-get_pc.c: New file.
	(CFLAGS-tst-sigcontextinfo-get_pc.c): New rule.

3 files changed, 139 insertions, 166 deletions

diff --git a/sysdeps/unix/sysv/linux/i386/profil-counter.h b/sysdeps/unix/sysv/linux/i386/profil-counter.h
deleted file mode 100644
index d6bbc04be8..0000000000
--- a/sysdeps/unix/sysv/linux/i386/profil-counter.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/* Low-level statistical profiling support function.  Linux/i386 version.
-   Copyright (C) 1996-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#include <signal.h>
-#include <sigcontextinfo.h>
-
-static void
-__profil_counter (int signo, const SIGCONTEXT scp)
-{
-  profil_count ((void *) GET_PC (scp));
-
-  /* This is a hack to prevent the compiler from implementing the
-     above function call as a sibcall.  The sibcall would overwrite
-     the signal context.  */
-  asm volatile ("");
-}
diff --git a/sysdeps/unix/sysv/linux/i386/register-dump.h b/sysdeps/unix/sysv/linux/i386/register-dump.h
index 744e136ce7..8364238635 100644
--- a/sysdeps/unix/sysv/linux/i386/register-dump.h
+++ b/sysdeps/unix/sysv/linux/i386/register-dump.h
@@ -51,7 +51,7 @@ hexvalue (unsigned long int value, char *buf, size_t len)
 }
 
 static void
-register_dump (int fd, struct sigcontext *ctx)
+register_dump (int fd, struct ucontext_t *ctx)
 {
   char regs[21][8];
   char fpregs[31][8];
@@ -68,27 +68,27 @@ register_dump (int fd, struct sigcontext *ctx)
   ++nr
 
   /* Generate strings of register contents.  */
-  hexvalue (ctx->eax, regs[0], 8);
-  hexvalue (ctx->ebx, regs[1], 8);
-  hexvalue (ctx->ecx, regs[2], 8);
-  hexvalue (ctx->edx, regs[3], 8);
-  hexvalue (ctx->esi, regs[4], 8);
-  hexvalue (ctx->edi, regs[5], 8);
-  hexvalue (ctx->ebp, regs[6], 8);
-  hexvalue (ctx->esp, regs[7], 8);
-  hexvalue (ctx->eip, regs[8], 8);
-  hexvalue (ctx->eflags, regs[9], 8);
-  hexvalue (ctx->cs, regs[10], 4);
-  hexvalue (ctx->ds, regs[11], 4);
-  hexvalue (ctx->es, regs[12], 4);
-  hexvalue (ctx->fs, regs[13], 4);
-  hexvalue (ctx->gs, regs[14], 4);
-  hexvalue (ctx->ss, regs[15], 4);
-  hexvalue (ctx->trapno, regs[16], 8);
-  hexvalue (ctx->err, regs[17], 8);
-  hexvalue (ctx->oldmask, regs[18], 8);
-  hexvalue (ctx->esp_at_signal, regs[19], 8);
-  hexvalue (ctx->cr2, regs[20], 8);
+  hexvalue (ctx->uc_mcontext.gregs[REG_EAX], regs[0], 8);
+  hexvalue (ctx->uc_mcontext.gregs[REG_EBX], regs[1], 8);
+  hexvalue (ctx->uc_mcontext.gregs[REG_ECX], regs[2], 8);
+  hexvalue (ctx->uc_mcontext.gregs[REG_EDX], regs[3], 8);
+  hexvalue (ctx->uc_mcontext.gregs[REG_ESI], regs[4], 8);
+  hexvalue (ctx->uc_mcontext.gregs[REG_EDI], regs[5], 8);
+  hexvalue (ctx->uc_mcontext.gregs[REG_EBP], regs[6], 8);
+  hexvalue (ctx->uc_mcontext.gregs[REG_ESP], regs[7], 8);
+  hexvalue (ctx->uc_mcontext.gregs[REG_EIP], regs[8], 8);
+  hexvalue (ctx->uc_flags, regs[9], 8);
+  hexvalue (ctx->uc_mcontext.gregs[REG_CS], regs[10], 4);
+  hexvalue (ctx->uc_mcontext.gregs[REG_DS], regs[11], 4);
+  hexvalue (ctx->uc_mcontext.gregs[REG_ES], regs[12], 4);
+  hexvalue (ctx->uc_mcontext.gregs[REG_FS], regs[13], 4);
+  hexvalue (ctx->uc_mcontext.gregs[REG_GS], regs[14], 4);
+  hexvalue (ctx->uc_mcontext.gregs[REG_SS], regs[15], 4);
+  hexvalue (ctx->uc_mcontext.gregs[REG_TRAPNO], regs[16], 8);
+  hexvalue (ctx->uc_mcontext.gregs[REG_ERR], regs[17], 8);
+  hexvalue (ctx->uc_mcontext.oldmask, regs[18], 8);
+  hexvalue (ctx->uc_mcontext.gregs[REG_UESP], regs[19], 8);
+  hexvalue (ctx->uc_mcontext.cr2, regs[20], 8);
 
   /* Generate the output.  */
   ADD_STRING ("Register dump:\n\n EAX: ");
@@ -134,116 +134,112 @@ register_dump (int fd, struct sigcontext *ctx)
   ADD_STRING ("   CR2: ");
   ADD_MEM (regs[20], 8);
 
-  if (ctx->fpstate != NULL)
-    {
-
-      /* Generate output for the FPU control/status registers.  */
-      hexvalue (ctx->fpstate->cw, fpregs[0], 8);
-      hexvalue (ctx->fpstate->sw, fpregs[1], 8);
-      hexvalue (ctx->fpstate->tag, fpregs[2], 8);
-      hexvalue (ctx->fpstate->ipoff, fpregs[3], 8);
-      hexvalue (ctx->fpstate->cssel, fpregs[4], 4);
-      hexvalue (ctx->fpstate->dataoff, fpregs[5], 8);
-      hexvalue (ctx->fpstate->datasel, fpregs[6], 4);
-
-      ADD_STRING ("\n\n FPUCW: ");
-      ADD_MEM (fpregs[0], 8);
-      ADD_STRING ("   FPUSW: ");
-      ADD_MEM (fpregs[1], 8);
-      ADD_STRING ("   TAG: ");
-      ADD_MEM (fpregs[2], 8);
-      ADD_STRING ("\n IPOFF: ");
-      ADD_MEM (fpregs[3], 8);
-      ADD_STRING ("   CSSEL: ");
-      ADD_MEM (fpregs[4], 4);
-      ADD_STRING ("   DATAOFF: ");
-      ADD_MEM (fpregs[5], 8);
-      ADD_STRING ("   DATASEL: ");
-      ADD_MEM (fpregs[6], 4);
-
-      /* Now the real FPU registers.  */
-      hexvalue (ctx->fpstate->_st[0].exponent, fpregs[7], 8);
-      hexvalue (ctx->fpstate->_st[0].significand[3] << 16
-		| ctx->fpstate->_st[0].significand[2], fpregs[8], 8);
-      hexvalue (ctx->fpstate->_st[0].significand[1] << 16
-		| ctx->fpstate->_st[0].significand[0], fpregs[9], 8);
-      hexvalue (ctx->fpstate->_st[1].exponent, fpregs[10], 8);
-      hexvalue (ctx->fpstate->_st[1].significand[3] << 16
-		| ctx->fpstate->_st[1].significand[2], fpregs[11], 8);
-      hexvalue (ctx->fpstate->_st[1].significand[1] << 16
-		| ctx->fpstate->_st[1].significand[0], fpregs[12], 8);
-      hexvalue (ctx->fpstate->_st[2].exponent, fpregs[13], 8);
-      hexvalue (ctx->fpstate->_st[2].significand[3] << 16
-		| ctx->fpstate->_st[2].significand[2], fpregs[14], 8);
-      hexvalue (ctx->fpstate->_st[2].significand[1] << 16
-		| ctx->fpstate->_st[2].significand[0], fpregs[15], 8);
-      hexvalue (ctx->fpstate->_st[3].exponent, fpregs[16], 8);
-      hexvalue (ctx->fpstate->_st[3].significand[3] << 16
-		| ctx->fpstate->_st[3].significand[2], fpregs[17], 8);
-      hexvalue (ctx->fpstate->_st[3].significand[1] << 16
-		| ctx->fpstate->_st[3].significand[0], fpregs[18], 8);
-      hexvalue (ctx->fpstate->_st[4].exponent, fpregs[19], 8);
-      hexvalue (ctx->fpstate->_st[4].significand[3] << 16
-		| ctx->fpstate->_st[4].significand[2], fpregs[20], 8);
-      hexvalue (ctx->fpstate->_st[4].significand[1] << 16
-		| ctx->fpstate->_st[4].significand[0], fpregs[21], 8);
-      hexvalue (ctx->fpstate->_st[5].exponent, fpregs[22], 8);
-      hexvalue (ctx->fpstate->_st[5].significand[3] << 16
-		| ctx->fpstate->_st[5].significand[2], fpregs[23], 8);
-      hexvalue (ctx->fpstate->_st[5].significand[1] << 16
-		| ctx->fpstate->_st[5].significand[0], fpregs[24], 8);
-      hexvalue (ctx->fpstate->_st[6].exponent, fpregs[25], 8);
-      hexvalue (ctx->fpstate->_st[6].significand[3] << 16
-		| ctx->fpstate->_st[6].significand[2], fpregs[26], 8);
-      hexvalue (ctx->fpstate->_st[6].significand[1] << 16
-		| ctx->fpstate->_st[6].significand[0], fpregs[27], 8);
-      hexvalue (ctx->fpstate->_st[7].exponent, fpregs[28], 8);
-      hexvalue (ctx->fpstate->_st[7].significand[3] << 16
-		| ctx->fpstate->_st[7].significand[2], fpregs[29], 8);
-      hexvalue (ctx->fpstate->_st[7].significand[1] << 16
-		| ctx->fpstate->_st[7].significand[0], fpregs[30], 8);
-
-      ADD_STRING ("\n\n ST(0) ");
-      ADD_MEM (fpregs[7], 4);
-      ADD_STRING (" ");
-      ADD_MEM (fpregs[8], 8);
-      ADD_MEM (fpregs[9], 8);
-      ADD_STRING ("   ST(1) ");
-      ADD_MEM (fpregs[10], 4);
-      ADD_STRING (" ");
-      ADD_MEM (fpregs[11], 8);
-      ADD_MEM (fpregs[12], 8);
-      ADD_STRING ("\n ST(2) ");
-      ADD_MEM (fpregs[13], 4);
-      ADD_STRING (" ");
-      ADD_MEM (fpregs[14], 8);
-      ADD_MEM (fpregs[15], 8);
-      ADD_STRING ("   ST(3) ");
-      ADD_MEM (fpregs[16], 4);
-      ADD_STRING (" ");
-      ADD_MEM (fpregs[17], 8);
-      ADD_MEM (fpregs[18], 8);
-      ADD_STRING ("\n ST(4) ");
-      ADD_MEM (fpregs[19], 4);
-      ADD_STRING (" ");
-      ADD_MEM (fpregs[20], 8);
-      ADD_MEM (fpregs[21], 8);
-      ADD_STRING ("   ST(5) ");
-      ADD_MEM (fpregs[22], 4);
-      ADD_STRING (" ");
-      ADD_MEM (fpregs[23], 8);
-      ADD_MEM (fpregs[24], 8);
-      ADD_STRING ("\n ST(6) ");
-      ADD_MEM (fpregs[25], 4);
-      ADD_STRING (" ");
-      ADD_MEM (fpregs[26], 8);
-      ADD_MEM (fpregs[27], 8);
-      ADD_STRING ("   ST(7) ");
-      ADD_MEM (fpregs[28], 4);
-      ADD_STRING (" ");
-      ADD_MEM (fpregs[29], 8);
-      ADD_MEM (fpregs[30], 8);
-    }
+  /* Generate output for the FPU control/status registers.  */
+  hexvalue (ctx->__fpregs_mem.cw, fpregs[0], 8);
+  hexvalue (ctx->__fpregs_mem.sw, fpregs[1], 8);
+  hexvalue (ctx->__fpregs_mem.tag, fpregs[2], 8);
+  hexvalue (ctx->__fpregs_mem.ipoff, fpregs[3], 8);
+  hexvalue (ctx->__fpregs_mem.cssel, fpregs[4], 4);
+  hexvalue (ctx->__fpregs_mem.dataoff, fpregs[5], 8);
+  hexvalue (ctx->__fpregs_mem.datasel, fpregs[6], 4);
+
+  ADD_STRING ("\n\n FPUCW: ");
+  ADD_MEM (fpregs[0], 8);
+  ADD_STRING ("   FPUSW: ");
+  ADD_MEM (fpregs[1], 8);
+  ADD_STRING ("   TAG: ");
+  ADD_MEM (fpregs[2], 8);
+  ADD_STRING ("\n IPOFF: ");
+  ADD_MEM (fpregs[3], 8);
+  ADD_STRING ("   CSSEL: ");
+  ADD_MEM (fpregs[4], 4);
+  ADD_STRING ("   DATAOFF: ");
+  ADD_MEM (fpregs[5], 8);
+  ADD_STRING ("   DATASEL: ");
+  ADD_MEM (fpregs[6], 4);
+
+  /* Now the real FPU registers.  */
+  hexvalue (ctx->__fpregs_mem._st[0].exponent, fpregs[7], 8);
+  hexvalue (ctx->__fpregs_mem._st[0].significand[3] << 16
+		| ctx->__fpregs_mem._st[0].significand[2], fpregs[8], 8);
+  hexvalue (ctx->__fpregs_mem._st[0].significand[1] << 16
+		| ctx->__fpregs_mem._st[0].significand[0], fpregs[9], 8);
+  hexvalue (ctx->__fpregs_mem._st[1].exponent, fpregs[10], 8);
+  hexvalue (ctx->__fpregs_mem._st[1].significand[3] << 16
+		| ctx->__fpregs_mem._st[1].significand[2], fpregs[11], 8);
+  hexvalue (ctx->__fpregs_mem._st[1].significand[1] << 16
+		| ctx->__fpregs_mem._st[1].significand[0], fpregs[12], 8);
+  hexvalue (ctx->__fpregs_mem._st[2].exponent, fpregs[13], 8);
+  hexvalue (ctx->__fpregs_mem._st[2].significand[3] << 16
+		| ctx->__fpregs_mem._st[2].significand[2], fpregs[14], 8);
+  hexvalue (ctx->__fpregs_mem._st[2].significand[1] << 16
+		| ctx->__fpregs_mem._st[2].significand[0], fpregs[15], 8);
+  hexvalue (ctx->__fpregs_mem._st[3].exponent, fpregs[16], 8);
+  hexvalue (ctx->__fpregs_mem._st[3].significand[3] << 16
+		| ctx->__fpregs_mem._st[3].significand[2], fpregs[17], 8);
+  hexvalue (ctx->__fpregs_mem._st[3].significand[1] << 16
+		| ctx->__fpregs_mem._st[3].significand[0], fpregs[18], 8);
+  hexvalue (ctx->__fpregs_mem._st[4].exponent, fpregs[19], 8);
+  hexvalue (ctx->__fpregs_mem._st[4].significand[3] << 16
+		| ctx->__fpregs_mem._st[4].significand[2], fpregs[20], 8);
+  hexvalue (ctx->__fpregs_mem._st[4].significand[1] << 16
+		| ctx->__fpregs_mem._st[4].significand[0], fpregs[21], 8);
+  hexvalue (ctx->__fpregs_mem._st[5].exponent, fpregs[22], 8);
+  hexvalue (ctx->__fpregs_mem._st[5].significand[3] << 16
+		| ctx->__fpregs_mem._st[5].significand[2], fpregs[23], 8);
+  hexvalue (ctx->__fpregs_mem._st[5].significand[1] << 16
+		| ctx->__fpregs_mem._st[5].significand[0], fpregs[24], 8);
+  hexvalue (ctx->__fpregs_mem._st[6].exponent, fpregs[25], 8);
+  hexvalue (ctx->__fpregs_mem._st[6].significand[3] << 16
+		| ctx->__fpregs_mem._st[6].significand[2], fpregs[26], 8);
+  hexvalue (ctx->__fpregs_mem._st[6].significand[1] << 16
+		| ctx->__fpregs_mem._st[6].significand[0], fpregs[27], 8);
+  hexvalue (ctx->__fpregs_mem._st[7].exponent, fpregs[28], 8);
+  hexvalue (ctx->__fpregs_mem._st[7].significand[3] << 16
+		| ctx->__fpregs_mem._st[7].significand[2], fpregs[29], 8);
+  hexvalue (ctx->__fpregs_mem._st[7].significand[1] << 16
+		| ctx->__fpregs_mem._st[7].significand[0], fpregs[30], 8);
+
+  ADD_STRING ("\n\n ST(0) ");
+  ADD_MEM (fpregs[7], 4);
+  ADD_STRING (" ");
+  ADD_MEM (fpregs[8], 8);
+  ADD_MEM (fpregs[9], 8);
+  ADD_STRING ("   ST(1) ");
+  ADD_MEM (fpregs[10], 4);
+  ADD_STRING (" ");
+  ADD_MEM (fpregs[11], 8);
+  ADD_MEM (fpregs[12], 8);
+  ADD_STRING ("\n ST(2) ");
+  ADD_MEM (fpregs[13], 4);
+  ADD_STRING (" ");
+  ADD_MEM (fpregs[14], 8);
+  ADD_MEM (fpregs[15], 8);
+  ADD_STRING ("   ST(3) ");
+  ADD_MEM (fpregs[16], 4);
+  ADD_STRING (" ");
+  ADD_MEM (fpregs[17], 8);
+  ADD_MEM (fpregs[18], 8);
+  ADD_STRING ("\n ST(4) ");
+  ADD_MEM (fpregs[19], 4);
+  ADD_STRING (" ");
+  ADD_MEM (fpregs[20], 8);
+  ADD_MEM (fpregs[21], 8);
+  ADD_STRING ("   ST(5) ");
+  ADD_MEM (fpregs[22], 4);
+  ADD_STRING (" ");
+  ADD_MEM (fpregs[23], 8);
+  ADD_MEM (fpregs[24], 8);
+  ADD_STRING ("\n ST(6) ");
+  ADD_MEM (fpregs[25], 4);
+  ADD_STRING (" ");
+  ADD_MEM (fpregs[26], 8);
+  ADD_MEM (fpregs[27], 8);
+  ADD_STRING ("   ST(7) ");
+  ADD_MEM (fpregs[28], 4);
+  ADD_STRING (" ");
+  ADD_MEM (fpregs[29], 8);
+  ADD_MEM (fpregs[30], 8);
 
   ADD_STRING ("\n");
 
@@ -252,4 +248,4 @@ register_dump (int fd, struct sigcontext *ctx)
 }
 
 
-#define REGISTER_DUMP register_dump (fd, &ctx)
+#define REGISTER_DUMP register_dump (fd, ctx)
diff --git a/sysdeps/unix/sysv/linux/i386/sigcontextinfo.h b/sysdeps/unix/sysv/linux/i386/sigcontextinfo.h
index 789a127a58..d0f23f5f0e 100644
--- a/sysdeps/unix/sysv/linux/i386/sigcontextinfo.h
+++ b/sysdeps/unix/sysv/linux/i386/sigcontextinfo.h
@@ -16,5 +16,13 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#define SIGCONTEXT struct sigcontext
-#define GET_PC(ctx)	((void *) ctx.eip)
+#ifndef _SIGCONTEXTINFO_H
+#define _SIGCONTEXTINFO_H
+
+static inline uintptr_t
+sigcontext_get_pc (const ucontext_t *ctx)
+{
+ return ctx->uc_mcontext.gregs[REG_EIP];
+}
+
+#endif