diff options
| author | linted <linted@users.noreply.github.com> | 2022-10-07 22:49:12 -0400 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2022-10-14 09:47:14 +0200 |
| commit | 9e854172e249a383d858fef70368af63a04a28a8 (patch) | |
| tree | 31bb6372f43a1999b948b93acf6f73100083e2ce | |
| parent | 663b8a0497c40a20668258bd69db13924c569c41 (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>
| -rw-r--r-- | extra/Configs/Config.in | 2 | ||||
| -rw-r--r-- | libc/sysdeps/linux/powerpc/crt1.S | 19 |
2 files changed, 20 insertions, 1 deletions
diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in index dd1beaadc..1c41d77ff 100644 --- a/extra/Configs/Config.in +++ b/extra/Configs/Config.in @@ -326,7 +326,7 @@ config STATIC_PIE default n depends on DOPIC && !UCLIBC_FORMAT_FDPIC_ELF && \ (TARGET_arm || TARGET_i386 || TARGET_x86_64 || TARGET_aarch64 || \ - TARGET_mips || TARGET_xtensa) + TARGET_mips || TARGET_xtensa || TARGET_powerpc) config ARCH_HAS_NO_SHARED bool 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__ |