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(syscall_error): Support PIC and re-entrant code.

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This commit is contained in:
Ulrich Drepper 1998-03-18 14:31:30 +00:00
parent 7733906da7
commit 3500923da8
1 changed files with 33 additions and 3 deletions
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36
sysdeps/unix/arm/sysdep.S
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@ -1,4 +1,4 @@
/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
/* Copyright (C) 1991,92,93,94,95,96,97,98 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
@ -23,8 +23,6 @@
.globl C_SYMBOL_NAME(errno)
.globl syscall_error
_errno_loc: .long C_SYMBOL_NAME(errno)
#undef syscall_error
#ifdef NO_UNDERSCORES
__syscall_error:
@ -38,12 +36,44 @@ syscall_error:
cmp r0, $EWOULDBLOCK_sys /* Is it the old EWOULDBLOCK? */
moveq r0, $EAGAIN /* Yes; translate it to EAGAIN. */
#endif
#ifndef PIC
ldr r1, _errno_loc
str r0, [r1]
#ifdef _LIBC_REENTRANT
stmdb sp!, {r0, lr}
/* put another copy of r0 at a specific errno location */
bl __errno_location
ldmia sp!, {r1, lr}
str r1, [r0]
#endif
#else
stmdb sp!,{r10, lr}
@ we have to establish our PIC register
ldr r10, 1f
add r10, pc, r10
0: ldr r1, 2f
ldr r1, [r10, r1]
@ store a copy in _errno_loc
str r0, [r1]
#ifdef _LIBC_REENTRANT
@ and another copy in thread copy of _errno_loc
mov r10, r0
bl __errno_location(PLT)
str r10, [r0]
#endif
ldmia sp!, {r10, lr}
b 4f
1: .word _GLOBAL_OFFSET_TABLE_ - 0b - 4
2: .word C_SYMBOL_NAME(errno)(GOT)
4:
#endif
mvn r0, $0
RETINSTR(mov, pc, r14)
#ifndef PIC
_errno_loc: .long C_SYMBOL_NAME(errno)
#endif
#undef __syscall_error
END (__syscall_error)