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a1bd5f8673
Use <arch-syscall.h> instead of <asm/unistd.h> to obtain the system call numbers. A few direct includes of <asm/unistd.h> need to be removed (if the system call numbers are already provided indirectly by <sysdep.h>) or replaced with <sys/syscall.h>. Current Linux headers for alpha define the required system call names, so most of the _NR_* hacks are no longer needed. For the 32-bit arm architecture, eliminate the INTERNAL_SYSCALL_ARM macro, now that we have regular system call names for cacheflush and set_tls. There are more such cleanup opportunities for other architectures, but these cleanups are required to avoid macro redefinition errors during the build. For ia64, it is desirable to use <asm/break.h> directly to obtain the break number for system calls (which is not a system call number itself). This requires replacing __BREAK_SYSCALL with __IA64_BREAK_SYSCALL because the former is defined as an alias in <asm/unistd.h>, but not in <asm/break.h>. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
119 lines
3.4 KiB
ArmAsm
119 lines
3.4 KiB
ArmAsm
/* Copyright (C) 1999-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Written by Jes Sorensen, <Jes.Sorensen@cern.ch>, April 1999.
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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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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file with other
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programs, and to distribute those programs without any restriction
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coming from the use of this file. (The GNU Lesser General Public
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License restrictions do apply in other respects; for example, they
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cover modification of the file, and distribution when not linked
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into another program.)
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Note that people who make modified versions of this file are not
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obligated to grant this special exception for their modified
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versions; it is their choice whether to do so. The GNU Lesser
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General Public License gives permission to release a modified
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version without this exception; this exception also makes it
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possible to release a modified version which carries forward this
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exception.
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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 <asm/fpu.h>
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/*
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* Arguments for __libc_start_main:
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* out0: main
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* out1: argc
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* out2: argv
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* out3: init
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* out4: fini
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* out5: rtld_fini
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* out6: stack_end
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*/
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.align 32
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.global _start
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.proc _start
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.type _start,@function
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_start:
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.prologue
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.save rp, r0
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.body
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.prologue
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{ .mlx
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alloc r2 = ar.pfs,0,0,7,0
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movl r3 = FPSR_DEFAULT
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}
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{ .mlx
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adds out2 = 16, sp /* get address of argc value */
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movl gp = @gprel(0f)
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;;
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}
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0: { .mmi
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ld8 out1 = [out2], 8 /* load argc and move out2 to become argv */
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mov.m r10 = ar.bsp /* fetch rbs base address */
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mov r9 = ip
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;;
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}
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{ .mii
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mov ar.fpsr = r3
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sub gp = r9, gp /* back-compute gp value */
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adds out6 = 16, sp /* highest non-environment stack address */
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;;
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}
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{
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addl r11 = @ltoff(__libc_ia64_register_backing_store_base), gp
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addl out0 = @ltoff(@fptr(main)), gp
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addl out3 = @ltoff(@fptr(__libc_csu_init)), gp
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;;
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}
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{ .mmi
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ld8 r3 = [r11] /* pointer to __libc_ia64_register_backing_store_base */
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ld8 out0 = [out0] /* pointer to `main' function descriptor */
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addl out4 = @ltoff(@fptr(__libc_csu_fini)), gp
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;;
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}
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{ .mmi
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ld8 out3 = [out3] /* pointer to `init' function descriptor */
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ld8 out4 = [out4] /* pointer to `fini' function descriptor */
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nop 0
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}
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.body
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{ .mib
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st8 [r3] = r10
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mov out5 = ret0 /* dynamic linker destructor */
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br.call.sptk.few rp = __libc_start_main
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}
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{ .mib
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break 0 /* break miserably if we ever return */
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}
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.endp _start
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/* Define a symbol for the first piece of initialized data. */
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.data
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.globl __data_start
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__data_start:
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.long 0
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.weak data_start
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data_start = __data_start
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.common __libc_ia64_register_backing_store_base, 8, 8
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