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authorlinted <linted@users.noreply.github.com>2022-10-07 22:49:12 -0400
committerWaldemar Brodkorb <wbx@openadk.org>2022-10-14 09:47:14 +0200
commit9e854172e249a383d858fef70368af63a04a28a8 (patch)
tree31bb6372f43a1999b948b93acf6f73100083e2ce /libc/sysdeps/linux/powerpc/crt1.S
parent663b8a0497c40a20668258bd69db13924c569c41 (diff)
Static pie support for ppc
Modified config files and crt1.S to support static pie elf generation. Signed-off-by: linted <linted@users.noreply.github.com>
Diffstat (limited to 'libc/sysdeps/linux/powerpc/crt1.S')
-rw-r--r--libc/sysdeps/linux/powerpc/crt1.S19
1 files changed, 19 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/powerpc/crt1.S b/libc/sysdeps/linux/powerpc/crt1.S
index 3f5d056c0..3ac32636c 100644
--- a/libc/sysdeps/linux/powerpc/crt1.S
+++ b/libc/sysdeps/linux/powerpc/crt1.S
@@ -41,6 +41,9 @@
.weak _init
.weak _fini
#endif
+#ifdef L_rcrt1
+ .type reloc_static_pie,%function
+#endif
.type main,%function
.type __uClibc_main,%function
@@ -61,6 +64,22 @@ _start:
# ifdef PPC_HAS_SECUREPLT
mr 30,31
# endif
+#ifdef L_rcrt1
+ stwu r3, -4(r1) /* Save r3 */
+ stwu r9, -16(r1) /* Save r9 */
+ bcl 20,31,2f /* Jump to label 2 */
+2: mflr r3 /* Load lr into r3 */
+ addis r3, r3, _DYNAMIC-2b@ha /* Add high half of _DYNAMIC to r3 */
+ addi r3,r3,_DYNAMIC-2b@l /* Add low half of _DYNAMIC */
+ lwz r4, 0(r31) /* load _DYNAMIC from the GOT */
+ subf r3, r4, r3 /* sub _DYNAMIC@got and it's actual address */
+ bl reloc_static_pie /* Call reloc_static_pie */
+ lwzu r9, 0(r1) /* restore r9 */
+ addi r1, r1, 16 /* update stack pointer */
+ lwzu r3, 0(r1) /* restore r3 */
+ addi r1, r1, 4 /* update stack pointer */
+ li r5, 0 /* zero r5 */
+#endif
#endif
/* Set up the small data pointer in r13. */
#ifdef __PIC__