From: Ulrich Drepper <drepper@redhat.com>
Date: Tue, 21 May 2002 02:18:04 +0000 (+0000)
Subject: (LOAD_PIC_REG): Define.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f5cb3df4c01af3c14aafb16ce310640b17ff6079;p=thirdparty%2Fglibc.git

(LOAD_PIC_REG): Define.
(elf_machine_dynamic): Use it to force PIC register to be loaded.
(elf_machine_load_address): Likewise.
---

diff --git a/sysdeps/sparc/sparc32/dl-machine.h b/sysdeps/sparc/sparc32/dl-machine.h
index d98848b5dd7..8426ffb765b 100644
--- a/sysdeps/sparc/sparc32/dl-machine.h
+++ b/sysdeps/sparc/sparc32/dl-machine.h
@@ -64,6 +64,17 @@ elf_machine_matches_host (const Elf32_Ehdr *ehdr)
     return 0;
 }
 
+/* We have to do this because elf_machine_{dynamic,load_address} can be
+   invoked from functions that have no GOT references, and thus the compiler
+   has no obligation to load the PIC register.  */
+#define LOAD_PIC_REG(PIC_REG)	\
+do {	register Elf32_Addr pc __asm("o7"); \
+	__asm("sethi %%hi(_GLOBAL_OFFSET_TABLE_-4), %1\n\t" \
+	      "call 1f\n\t" \
+	      "add %1, %%lo(_GLOBAL_OFFSET_TABLE_+4), %1\n" \
+	      "1:\tadd %1, %0, %1" \
+	      : "=r" (pc), "=r" (PIC_REG)); \
+} while (0)
 
 /* Return the link-time address of _DYNAMIC.  Conveniently, this is the
    first element of the GOT.  This must be inlined in a function which
@@ -72,6 +83,9 @@ static inline Elf32_Addr
 elf_machine_dynamic (void)
 {
   register Elf32_Addr *got asm ("%l7");
+
+  LOAD_PIC_REG (got);
+
   return *got;
 }
 
@@ -81,6 +95,8 @@ elf_machine_load_address (void)
 {
   register Elf32_Addr pc __asm("%o7"), pic __asm("%l7"), got;
 
+  LOAD_PIC_REG (pic);
+
   /* Utilize the fact that a local .got entry will be partially
      initialized at startup awaiting its RELATIVE fixup.  */
 
diff --git a/sysdeps/sparc/sparc64/dl-machine.h b/sysdeps/sparc/sparc64/dl-machine.h
index b0f3d367e8b..eb4af958a83 100644
--- a/sysdeps/sparc/sparc64/dl-machine.h
+++ b/sysdeps/sparc/sparc64/dl-machine.h
@@ -34,6 +34,18 @@ elf_machine_matches_host (const Elf64_Ehdr *ehdr)
   return ehdr->e_machine == EM_SPARCV9;
 }
 
+/* We have to do this because elf_machine_{dynamic,load_address} can be
+   invoked from functions that have no GOT references, and thus the compiler
+   has no obligation to load the PIC register.  */
+#define LOAD_PIC_REG(PIC_REG)	\
+do {	Elf64_Addr tmp;		\
+	__asm("sethi %%hi(_GLOBAL_OFFSET_TABLE_-4), %1\n\t" \
+	      "rd %%pc, %0\n\t" \
+	      "add %1, %%lo(_GLOBAL_OFFSET_TABLE_+4), %1\n\t" \
+	      "add %0, %1, %0" \
+	      : "=r" (PIC_REG), "=r" (tmp)); \
+} while (0)
+
 /* Return the link-time address of _DYNAMIC.  Conveniently, this is the
    first element of the GOT.  This must be inlined in a function which
    uses global data.  */
@@ -42,6 +54,8 @@ elf_machine_dynamic (void)
 {
   register Elf64_Addr *elf_pic_register __asm__("%l7");
 
+  LOAD_PIC_REG (elf_pic_register);
+
   return *elf_pic_register;
 }
 
@@ -51,6 +65,8 @@ elf_machine_load_address (void)
 {
   register Elf64_Addr *elf_pic_register __asm__("%l7");
 
+  LOAD_PIC_REG (elf_pic_register);
+
   /* We used to utilize the fact that a local .got entry will
      be partially initialized at startup awaiting its RELATIVE
      fixup: