diff options
| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2022-03-29 16:30:33 +0100 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2022-08-05 19:45:19 +0100 |
| commit | a0cbaef87cd3eda4667fdd3bc8df6b57dc7fc722 (patch) | |
| tree | 4d74b654b9bcb8d1d4816a22b8217d3a8f333805 | |
| parent | 4f45607de99f3b686a029bfdcc239ffb6ee0f398 (diff) | |
| download | glibc-a0cbaef87cd3eda4667fdd3bc8df6b57dc7fc722.tar.gz glibc-a0cbaef87cd3eda4667fdd3bc8df6b57dc7fc722.tar.xz glibc-a0cbaef87cd3eda4667fdd3bc8df6b57dc7fc722.zip | |
aarch64: morello: rtld: add ld.so _start code
The purecap version of aarch64 dl-start.S. Note: self relocation of ld.so is handled by the rtld bootstrap code.
| -rw-r--r-- | sysdeps/aarch64/morello/dl-start.S | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/sysdeps/aarch64/morello/dl-start.S b/sysdeps/aarch64/morello/dl-start.S new file mode 100644 index 0000000000..ea8d43522d --- /dev/null +++ b/sysdeps/aarch64/morello/dl-start.S @@ -0,0 +1,68 @@ +/* ld.so _start code. + Copyright (C) 2022 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +ENTRY(_start) + + /* Create an initial frame with 0 LR and FP */ + cfi_undefined (c30) + mov c29, czr + mov c30, czr + mov c0, csp + bl _dl_start + /* Returns user entry point in x0. */ + mov c21, c0 +.globl _dl_start_user +.type _dl_start_user, %function +_dl_start_user: + /* Get argc. */ + ldr x1, [csp] + /* Get argv. */ + add c2, csp, 16 + /* Compute envp. */ + add c3, c2, x1, lsl 4 + add c3, c3, 16 + + adrp c16, capinit_rtld_local + ldr c16, [c16, :lo12:capinit_rtld_local] + ldr c0, [c16] + bl _dl_init + /* Load the finalizer function. */ + adrp c0, capinit_dl_fini + ldr c0, [c0, :lo12:capinit_dl_fini] + /* Jump to the user's entry point. */ + mov c16, c21 + br c16 +END(_start) + + .section .data.rel.ro.local,"aw" + .align 4 + .type capinit_rtld_local, %object + .size capinit_rtld_local, 16 +capinit_rtld_local: + .capinit _rtld_local + .xword 0 + .xword 0 + .type capinit_dl_fini, %object + .size capinit_dl_fini, 16 +capinit_dl_fini: + .capinit _dl_fini + .xword 0 + .xword 0 |