(RTLD_START): Set up dp with DT_PLTGOT value from application so that
authordrepper <drepper>
Tue, 24 Apr 2001 19:38:55 +0000 (19:38 +0000)
committerdrepper <drepper>
Tue, 24 Apr 2001 19:38:55 +0000 (19:38 +0000)
constructors in non-PIC libs work.
(RTLD_START): _dl_init now returns a function pointer, hence load the jump
address and gp from the function pointer before jumping.

sysdeps/hppa/dl-machine.h

index a3437b5..6f2020c 100644 (file)
@@ -248,7 +248,17 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
    The C function `_dl_start' is the real entry point;
    its return value is the user program's entry point.  */
 
-#define RTLD_START asm ("\
+#define RTLD_START \
+/* Set up dp for any non-PIC lib constructors that may be called.  */  \
+static struct link_map * set_dp (struct link_map *map)         \
+{                                                              \
+  register Elf32_Addr dp asm ("%r27");                         \
+  dp = D_PTR (map, l_info[DT_PLTGOT]);                         \
+  asm volatile ("" : : "r" (dp));                              \
+  return map;                                                  \
+}                                                              \
+                                                               \
+asm ("\
        .text
        .globl _start
        .type _start,@function
@@ -324,7 +334,6 @@ _start:
        bl      _dl_start,%rp
        ldo     -4(%r24),%r26
 
-       /* FALLTHRU */
        .globl _dl_start_user
        .type _dl_start_user,@function
 _dl_start_user:
@@ -352,10 +361,14 @@ _dl_start_user:
        stw     %r24,-44(%sp)
 
 .Lnofix:
-       /* Call _dl_init(_dl_loaded, argc, argv, envp). */
        addil   LT'_dl_loaded,%r19
        ldw     RT'_dl_loaded(%r1),%r26
+       bl      set_dp, %r2
        ldw     0(%r26),%r26
+
+       /* Call _dl_init(_dl_loaded, argc, argv, envp). */
+       copy    %r28,%r26
+
        /* envp = argv + argc + 1 */
        sh2add  %r25,%r24,%r23
        bl      _dl_init,%r2
@@ -373,11 +386,18 @@ __dl_fini_plabel:
        .word   0xdeadbeef
        .previous
 
+       /* %r3 contains a function pointer, we need to mask out the lower
+        * bits and load the gp and jump address. */
+       depi    0,31,2,%r3
+       ldw     0(%r3),%r2
        addil   LT'__dl_fini_plabel,%r19
        ldw     RT'__dl_fini_plabel(%r1),%r23
        stw     %r19,4(%r23)
-       bv      %r0(%r3)
-       depi    2,31,2,%r23     /* delay slot */");
+       ldw     4(%r3),%r19     /* load the object's gp */
+       bv      %r0(%r2)
+       depi    2,31,2,%r23     /* delay slot */
+");
+
 
 /* This code gets called via the .plt stub, and is used in
    dl-runtime.c to call the `fixup' function and then redirect to the