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Diffstat (limited to 'sysdeps/s390/s390-32/dl-machine.h')
-rw-r--r--sysdeps/s390/s390-32/dl-machine.h151
1 files changed, 135 insertions, 16 deletions
diff --git a/sysdeps/s390/s390-32/dl-machine.h b/sysdeps/s390/s390-32/dl-machine.h
index 8bbf858fbf..52922a813b 100644
--- a/sysdeps/s390/s390-32/dl-machine.h
+++ b/sysdeps/s390/s390-32/dl-machine.h
@@ -1,6 +1,5 @@
/* Machine-dependent ELF dynamic relocation inline functions. S390 Version.
- Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
- Free Software Foundation, Inc.
+ Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
Contributed by Carl Pederson & Martin Schwidefsky.
This file is part of the GNU C Library.
@@ -22,6 +21,7 @@
#ifndef dl_machine_h
#define dl_machine_h
+
#define ELF_MACHINE_NAME "s390"
#include <sys/param.h>
@@ -112,8 +112,7 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
{
got[2] = (Elf32_Addr) &_dl_runtime_profile;
- if (GLRO(dl_profile) != NULL
- && _dl_name_match_p (GLRO(dl_profile), l))
+ if (_dl_name_match_p (GLRO(dl_profile), l))
/* This is the object we are looking for. Say that we really
want profiling and the timers are started. */
GL(dl_profile_map) = l;
@@ -127,6 +126,124 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
return lazy;
}
+/* This code is used in dl-runtime.c to call the `fixup' function
+ and then redirect to the address it returns. */
+
+/* s390:
+ Arguments are in register.
+ r2 - r7 holds the original parameters for the function call, fixup
+ and trampoline code use r0-r5 and r14-15. For the correct function
+ call r2-r5 and r14-15 must be restored.
+ Arguments from the PLT are stored at 24(r15) and 28(r15)
+ and must be moved to r2 and r3 for the fixup call (see elf32-s390.c
+ in the binutils for the PLT code).
+ Fixup function address in r2.
+*/
+#ifndef PROF
+#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
+ asm ( "\
+ .text\n\
+ .globl _dl_runtime_resolve\n\
+ .type _dl_runtime_resolve, @function\n\
+ .align 16\n\
+ " CFI_STARTPROC "\n\
+_dl_runtime_resolve:\n\
+ # save registers\n\
+ stm 2,5,32(15)\n\
+ st 14,48(15)\n\
+ lr 0,15\n\
+ ahi 15,-96\n\
+ " CFI_ADJUST_CFA_OFFSET(96)"\n\
+ st 0,0(15)\n\
+ # load args saved by PLT\n\
+ lm 2,3,120(15)\n\
+ basr 1,0\n\
+0: ahi 1,1f-0b\n\
+ l 14,0(1)\n\
+ bas 14,0(14,1) # call fixup\n\
+ lr 1,2 # function addr returned in r2\n\
+ # restore registers\n\
+ ahi 15,96\n\
+ " CFI_ADJUST_CFA_OFFSET(-96)" \n\
+ l 14,48(15)\n\
+ lm 2,5,32(15)\n\
+ br 1\n\
+1: .long fixup-1b\n\
+ " CFI_ENDPROC "\n\
+ .size _dl_runtime_resolve, .-_dl_runtime_resolve\n\
+\n\
+ .globl _dl_runtime_profile\n\
+ .type _dl_runtime_profile, @function\n\
+ .align 16\n\
+ " CFI_STARTPROC "\n\
+_dl_runtime_profile:\n\
+ # save registers\n\
+ stm 2,5,32(15)\n\
+ st 14,48(15)\n\
+ lr 0,15\n\
+ ahi 15,-96\n\
+ " CFI_ADJUST_CFA_OFFSET(96)"\n\
+ st 0,0(15)\n\
+ # load args saved by PLT\n\
+ lm 2,3,120(15)\n\
+ # load return address as third parameter\n\
+ lr 4,14\n\
+ basr 1,0\n\
+0: ahi 1,1f-0b\n\
+ l 14,0(1)\n\
+ bas 14,0(14,1) # call fixup\n\
+ lr 1,2 # function addr returned in r2\n\
+ # restore registers\n\
+ ahi 15,96\n\
+ " CFI_ADJUST_CFA_OFFSET(-96)" \n\
+ l 14,48(15)\n\
+ lm 2,5,32(15)\n\
+ br 1\n\
+1: .long profile_fixup-1b\n\
+ " CFI_ENDPROC "\n\
+ .size _dl_runtime_profile, .-_dl_runtime_profile\n\
+");
+#else
+#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
+ asm ( "\
+ .text\n\
+ .globl _dl_runtime_resolve\n\
+ .globl _dl_runtime_profile\n\
+ .type _dl_runtime_resolve, @function\n\
+ .type _dl_runtime_profile, @function\n\
+ .align 16\n\
+ " CFI_STARTPROC "\n\
+_dl_runtime_resolve:\n\
+_dl_runtime_profile:\n\
+ # save registers\n\
+ stm 2,5,32(15)\n\
+ st 14,48(15)\n\
+ lr 0,15\n\
+ ahi 15,-96\n\
+ " CFI_ADJUST_CFA_OFFSET(96)"\n\
+ st 0,0(15)\n\
+ # load args saved by PLT\n\
+ lm 2,3,120(15)\n\
+ # load return address as third parameter\n\
+ lr 4,14\n\
+ basr 1,0\n\
+0: ahi 1,1f-0b\n\
+ l 14,0(1)\n\
+ bas 14,0(14,1) # call fixup\n\
+ lr 1,2 # function addr returned in r2\n\
+ # restore registers\n\
+ ahi 15,96\n\
+ " CFI_ADJUST_CFA_OFFSET(-96)" \n\
+ l 14,48(15)\n\
+ lm 2,5,32(15)\n\
+ br 1\n\
+1: .long fixup-1b\n\
+ " CFI_ENDPROC "\n\
+ .size _dl_runtime_resolve, .-_dl_runtime_resolve\n\
+ .size _dl_runtime_profile, .-_dl_runtime_profile\n\
+");
+#endif
+
/* Mask identifying addresses reserved for the user program,
where the dynamic linker should not map anything. */
#define ELF_MACHINE_USER_ADDRESS_MASK 0xf8000000UL
@@ -258,20 +375,15 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rela *reloc,
return value;
}
-/* Names of the architecture-specific auditing callback functions. */
-#define ARCH_LA_PLTENTER s390_32_gnu_pltenter
-#define ARCH_LA_PLTEXIT s390_32_gnu_pltexit
-
#endif /* !dl_machine_h */
-#ifdef RESOLVE_MAP
+#ifdef RESOLVE
/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
MAP is the object containing the reloc. */
-auto inline void
-__attribute__ ((always_inline))
+static inline void
elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
const Elf32_Sym *sym, const struct r_found_version *version,
void *const reloc_addr_arg)
@@ -305,8 +417,17 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
#ifndef RESOLVE_CONFLICT_FIND_MAP
const Elf32_Sym *const refsym = sym;
#endif
+#if defined USE_TLS && !defined RTLD_BOOTSTRAP
struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type);
Elf32_Addr value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value;
+#else
+ Elf32_Addr value = RESOLVE (&sym, version, r_type);
+
+# ifndef RTLD_BOOTSTRAP
+ if (sym)
+# endif
+ value += sym->st_value;
+#endif /* use TLS and !RTLD_BOOTSTRAP */
switch (r_type)
{
@@ -418,8 +539,7 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
}
}
-auto inline void
-__attribute__ ((always_inline))
+static inline void
elf_machine_rela_relative (Elf32_Addr l_addr, const Elf32_Rela *reloc,
void *const reloc_addr_arg)
{
@@ -427,8 +547,7 @@ elf_machine_rela_relative (Elf32_Addr l_addr, const Elf32_Rela *reloc,
*reloc_addr = l_addr + reloc->r_addend;
}
-auto inline void
-__attribute__ ((always_inline))
+static inline void
elf_machine_lazy_rel (struct link_map *map,
Elf32_Addr l_addr, const Elf32_Rela *reloc)
{
@@ -448,4 +567,4 @@ elf_machine_lazy_rel (struct link_map *map,
_dl_reloc_bad_type (map, r_type, 1);
}
-#endif /* RESOLVE_MAP */
+#endif /* RESOLVE */
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-08 12:31:46 +0000