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Diffstat (limited to 'sysdeps/i386/dl-machine.h')
-rw-r--r--sysdeps/i386/dl-machine.h32
1 files changed, 30 insertions, 2 deletions
diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h
index 90ec6ce..40623e7 100644
--- a/sysdeps/i386/dl-machine.h
+++ b/sysdeps/i386/dl-machine.h
@@ -70,11 +70,16 @@ elf_machine_load_address (void)
(dynamic_info)[DT_RELSZ]->d_un.d_val -= sizeof (Elf32_Rel);
+#ifndef PROF
/* We add a declaration of this function here so that in dl-runtime.c
the ELF_MACHINE_RUNTIME_TRAMPOLINE macro really can pass the parameters
- in registers. */
+ in registers.
+
+ We cannot use this scheme for profiling because the _mcount call
+ destroys the passed register information. */
static ElfW(Addr) fixup (struct link_map *l, ElfW(Word) reloc_offset)
__attribute__ ((regparm (2), unused));
+#endif
/* Set up the loaded object described by L so its unrelocated PLT
entries will jump to the on-demand fixup code in dl-runtime.c. */
@@ -101,7 +106,8 @@ elf_machine_runtime_setup (struct link_map *l, int lazy)
/* This code is used in dl-runtime.c to call the `fixup' function
and then redirect to the address it returns. */
-#define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\
+#ifndef PROF
+# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\
.globl _dl_runtime_resolve
.type _dl_runtime_resolve, @function
_dl_runtime_resolve:
@@ -117,6 +123,28 @@ _dl_runtime_resolve:
ret $8 # Jump to function address.
.size _dl_runtime_resolve, .-_dl_runtime_resolve
");
+#else
+# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\
+ .globl _dl_runtime_resolve
+ .type _dl_runtime_resolve, @function
+_dl_runtime_resolve:
+ pushl %eax # Preserve registers otherwise clobbered.
+ pushl %ecx
+ pushl %edx
+ movl 16(%esp), %edx # Push the arguments for `fixup'
+ movl 12(%esp), %eax
+ pushl %edx
+ pushl %eax
+ call fixup # Call resolver.
+ popl %edx # Pop the parameters
+ popl %ecx
+ popl %edx # Get register content back.
+ popl %ecx
+ xchgl %eax, (%esp) # Get %eax contents end store function address.
+ ret $8 # Jump to function address.
+ .size _dl_runtime_resolve, .-_dl_runtime_resolve
+");
+#endif
/* The PLT uses Elf32_Rel relocs. */
#define elf_machine_relplt elf_machine_rel
}