mirror of
https://sourceware.org/git/glibc.git
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5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
227 lines
5.9 KiB
ArmAsm
227 lines
5.9 KiB
ArmAsm
/* Set up a context to call a function.
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Copyright (C) 2002-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <shlib-compat.h>
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#define __ASSEMBLY__
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#include <asm/ptrace.h>
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#include "ucontext_i.h"
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ENTRY(__makecontext)
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/* Set up the first 7 args to the function in its registers */
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lwz r11,_UC_REGS_PTR(r3)
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stw r6,_UC_GREGS+(PT_R3*4)(r11)
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stw r7,_UC_GREGS+(PT_R4*4)(r11)
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stw r8,_UC_GREGS+(PT_R5*4)(r11)
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stw r9,_UC_GREGS+(PT_R6*4)(r11)
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stw r10,_UC_GREGS+(PT_R7*4)(r11)
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lwz r8,8(r1)
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lwz r9,12(r1)
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stw r8,_UC_GREGS+(PT_R8*4)(r11)
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stw r9,_UC_GREGS+(PT_R9*4)(r11)
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/* Set the NIP to the start of the function */
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stw r4,_UC_GREGS+(PT_NIP*4)(r11)
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/* Set the function's r31 to ucp->uc_link for the exitcode below. */
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lwz r7,_UC_LINK(r3)
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stw r7,_UC_GREGS+(PT_R31*4)(r11)
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/* Set the function's LR to point to the exitcode below. */
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#ifdef PIC
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mflr r0
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cfi_register(lr,r0)
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/* Use this conditional form of branch and link to avoid destroying
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the cpu link stack used to predict blr return addresses. */
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bcl 20,31,1f
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1: mflr r6
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addi r6,r6,L(exitcode)-1b
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mtlr r0
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cfi_same_value (lr)
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#else
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lis r6,L(exitcode)@ha
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addi r6,r6,L(exitcode)@l
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#endif
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stw r6,_UC_GREGS+(PT_LNK*4)(r11)
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/*
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* Set up the stack frame for the function.
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* If we have more than 5 args to the function (8 args to makecontext),
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* there will be some arguments on the stack which have to end up
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* in registers. If there are more than 8 args to the function,
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* we have to copy (argc - 8) args from our stack to the functions'
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* stack (and allow space for them in the frame).
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*/
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lwz r4,_UC_STACK_SP(r3)
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lwz r8,_UC_STACK_SIZE(r3)
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add r4,r4,r8
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rlwinm r4,r4,0,0,27 /* round down to 16-byte boundary */
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addi r7,r4,-16 /* stack frame for fn's caller */
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cmpwi r5,8
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blt 2f /* less than 8 args is easy */
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lwz r10,16(r1)
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stw r10,_UC_GREGS+(PT_R10*4)(r11)
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beq 2f /* if exactly 8 args */
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subi r9,r5,3
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subi r5,r5,8
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rlwinm r9,r9,2,0,27
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subf r7,r9,r4
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mtctr r5 /* copy the 9th and following args */
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addi r6,r1,16
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addi r8,r7,4
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3: lwzu r10,4(r6)
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stwu r10,4(r8)
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bdnz 3b
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2: stw r7,_UC_GREGS+(PT_R1*4)(r11)
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li r6,0
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stw r6,0(r7)
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blr
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cfi_endproc
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nop
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/*
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* If the function returns, it comes here. We put ucp->uc_link in
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* r31, which is a callee-saved register. We have to continue with
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* the context that r31 points to, or exit if it is 0.
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*/
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L(exitcode):
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mr. r3,r31
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beq 4f
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bl __setcontext@local
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4: bl HIDDEN_JUMPTARGET(exit)
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b 4b
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cfi_startproc
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END(__makecontext)
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versioned_symbol (libc, __makecontext, makecontext, GLIBC_2_3_4)
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#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
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compat_text_section
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ENTRY(__novec_makecontext)
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/* Set up the first 7 args to the function in its registers */
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addi r11,r3,_UC_REG_SPACE
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stw r11,_UC_REGS_PTR(r3)
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stw r6,_UC_GREGS+(PT_R3*4)(r11)
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stw r7,_UC_GREGS+(PT_R4*4)(r11)
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stw r8,_UC_GREGS+(PT_R5*4)(r11)
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stw r9,_UC_GREGS+(PT_R6*4)(r11)
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stw r10,_UC_GREGS+(PT_R7*4)(r11)
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lwz r8,8(r1)
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lwz r9,12(r1)
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stw r8,_UC_GREGS+(PT_R8*4)(r11)
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stw r9,_UC_GREGS+(PT_R9*4)(r11)
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/* Set the NIP to the start of the function */
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stw r4,_UC_GREGS+(PT_NIP*4)(r11)
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/* Set the function's r31 to ucp->uc_link for the exitcode below. */
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lwz r7,_UC_LINK(r3)
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stw r7,_UC_GREGS+(PT_R31*4)(r11)
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/* Set the function's LR to point to the exitcode below. */
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#ifdef PIC
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mflr r0
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cfi_register(lr,r0)
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/* Use this conditional form of branch and link to avoid destroying
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the cpu link stack used to predict blr return addresses. */
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bcl 20,31,1f
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1: mflr r6
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addi r6,r6,L(novec_exitcode)-1b
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mtlr r0
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cfi_same_value (lr)
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#else
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lis r6,L(novec_exitcode)@ha
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addi r6,r6,L(novec_exitcode)@l
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#endif
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stw r6,_UC_GREGS+(PT_LNK*4)(r11)
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/*
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* Set up the stack frame for the function.
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* If we have more than 5 args to the function (8 args to makecontext),
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* there will be some arguments on the stack which have to end up
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* in registers. If there are more than 8 args to the function,
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* we have to copy (argc - 8) args from our stack to the functions'
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* stack (and allow space for them in the frame).
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*/
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lwz r4,_UC_STACK_SP(r3)
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lwz r8,_UC_STACK_SIZE(r3)
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add r4,r4,r8
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rlwinm r4,r4,0,0,27 /* round down to 16-byte boundary */
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addi r7,r4,-16 /* stack frame for fn's caller */
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cmpwi r5,8
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blt 2f /* less than 8 args is easy */
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lwz r10,16(r1)
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stw r10,_UC_GREGS+(PT_R10*4)(r11)
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beq 2f /* if exactly 8 args */
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subi r9,r5,3
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subi r5,r5,8
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rlwinm r9,r9,2,0,27
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subf r7,r9,r4
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mtctr r5 /* copy the 9th and following args */
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addi r6,r1,16
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addi r8,r7,4
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3: lwzu r10,4(r6)
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stwu r10,4(r8)
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bdnz 3b
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2: stw r7,_UC_GREGS+(PT_R1*4)(r11)
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li r6,0
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stw r6,0(r7)
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blr
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cfi_endproc
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nop
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/*
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* If the function returns, it comes here. We put ucp->uc_link in
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* r31, which is a callee-saved register. We have to continue with
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* the context that r31 points to, or exit if it is 0.
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*/
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L(novec_exitcode):
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mr. r3,r31
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beq 4f
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bl __novec_setcontext@local
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4: bl HIDDEN_JUMPTARGET(exit)
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b 4b
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cfi_startproc
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END(__novec_makecontext)
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.previous
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compat_symbol (libc, __novec_makecontext, makecontext, GLIBC_2_3_3)
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#endif
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#if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3)
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#define _ERRNO_H 1
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#include <bits/errno.h>
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compat_text_section
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ENTRY (__makecontext_stub)
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li r3,ENOSYS
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b __syscall_error@local
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END (__makecontext_stub)
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.previous
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compat_symbol (libc, __makecontext_stub, makecontext, GLIBC_2_1)
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#endif
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