mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 17:11:06 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/* Copyright (C) 2011-2022 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/>. */
|
|
|
|
#define _SYSDEPS_SYSDEP_H 1
|
|
#include <bits/hwcap.h>
|
|
|
|
#ifdef __ASSEMBLER__
|
|
|
|
#define SPARC_PIC_THUNK(reg) \
|
|
.ifndef __sparc_get_pc_thunk.reg; \
|
|
.section .text.__sparc_get_pc_thunk.reg,"axG",@progbits,__sparc_get_pc_thunk.reg,comdat; \
|
|
.align 32; \
|
|
.weak __sparc_get_pc_thunk.reg; \
|
|
.hidden __sparc_get_pc_thunk.reg; \
|
|
.type __sparc_get_pc_thunk.reg, #function; \
|
|
__sparc_get_pc_thunk.reg: \
|
|
jmp %o7 + 8; \
|
|
add %o7, %reg, %##reg; \
|
|
.previous; \
|
|
.endif;
|
|
|
|
/* The "-4" and "+4" offsets against _GLOBAL_OFFSET_TABLE_ are
|
|
critical since they represent the offset from the thunk call to the
|
|
instruction containing the _GLOBAL_OFFSET_TABLE_ reference.
|
|
Therefore these instructions cannot be moved around without
|
|
appropriate adjustments to those offsets.
|
|
|
|
Furthermore, these expressions are special in another regard. When
|
|
the assembler sees a reference to _GLOBAL_OFFSET_TABLE_ inside of
|
|
a %hi() or %lo(), it emits a PC-relative relocation. This causes
|
|
R_SPARC_HI22 to turn into R_SPARC_PC22, and R_SPARC_LO10 to turn into
|
|
R_SPARC_PC10, respectively.
|
|
|
|
Even when v9 we use a call sequence instead of using "rd %pc" because
|
|
RDPC is extremely expensive and incurs a full pipeline flush. */
|
|
|
|
#define SPARC_PIC_THUNK_CALL(reg) \
|
|
sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %##reg; \
|
|
call __sparc_get_pc_thunk.reg; \
|
|
or %##reg, %lo(_GLOBAL_OFFSET_TABLE_+4), %##reg;
|
|
|
|
#define SETUP_PIC_REG(reg) \
|
|
SPARC_PIC_THUNK(reg) \
|
|
SPARC_PIC_THUNK_CALL(reg)
|
|
|
|
#define SETUP_PIC_REG_LEAF(reg, tmp) \
|
|
SPARC_PIC_THUNK(reg) \
|
|
mov %o7, %##tmp; \
|
|
SPARC_PIC_THUNK_CALL(reg); \
|
|
mov %##tmp, %o7;
|
|
|
|
#undef ENTRY
|
|
#define ENTRY(name) \
|
|
.align 4; \
|
|
.global C_SYMBOL_NAME(name); \
|
|
.type name, @function; \
|
|
C_LABEL(name) \
|
|
cfi_startproc;
|
|
|
|
#undef END
|
|
#define END(name) \
|
|
cfi_endproc; \
|
|
.size name, . - name
|
|
|
|
#undef LOC
|
|
#define LOC(name) .L##name
|
|
|
|
#endif /* __ASSEMBLER__ */
|