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nicolasnoblenicolasnoble
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Merge pull request #163 from nicolasnoble/shell
Shell stub.
2 parents 8f684bf + b02e175 commit ad25507

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‎.circleci/config.yml

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@@ -18,6 +18,7 @@ jobs:
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name: Build
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command: |
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make -j 2
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make -C src/mips/shell -j 2
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make -C src/mips/openbios -j 2
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workflows:

‎src/mips/shell/Makefile

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TARGET = shell
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SRCS = \
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../common/hardware/cop0.s \
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crt0/crt0.s \
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main/main.c \
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LDSCRIPT = shell.ld
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include ../common.mk

‎src/mips/shell/crt0/crt0.s

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/***************************************************************************
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* Copyright (C) 2019 PCSX-Redux authors *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program 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 *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
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***************************************************************************/
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.section .start, "ax", @progbits
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.align 2
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.global main
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.global _start
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.type _start, @function
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_start:
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la $t0, __bss_start
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la $t1, __bss_end
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beq $t0, $t1, bss_init_skip
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bss_init:
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sw $0, 0($t0)
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addiu $t0, 4
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bne $t0, $t1, bss_init
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bss_init_skip:
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li $a0, 0
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li $a1, 0
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jal main
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jr $ra

‎src/mips/shell/main/main.c

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/***************************************************************************
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* Copyright (C) 2019 PCSX-Redux authors *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program 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 *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
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***************************************************************************/
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#include "common/hardware/cop0.h"
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int main() {
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return 0;
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}

‎src/mips/shell/shell.ld

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/***************************************************************************
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* Copyright (C) 2019 PCSX-Redux authors *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program 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 *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
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***************************************************************************/
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OUTPUT_FORMAT("elf32-tradlittlemips")
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OUTPUT_ARCH(mips)
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EXTERN(_start)
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ENTRY(_start)
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MEMORY {
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ram (rwx) : ORIGIN = 0x80010000, LENGTH = 2M - 0x10000
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dcache : ORIGIN = 0x1f800000, LENGTH = 0x400
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}
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__ram_top = ORIGIN(ram) + LENGTH(ram);
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__sp = __ram_top - 0x100;
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__dcache = ORIGIN(dcache);
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__dcache_top = ORIGIN(dcache) + LENGTH(dcache);
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__bss_len = (__bss_end - __bss_start);
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SECTIONS {
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__text_start = .;
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.text : {
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*(.start)
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*(.init)
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KEEP (*(SORT_NONE(.fini)))
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*(.text.unlikely .text.*_unlikely .text.unlikely.*)
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*(.text.exit .text.exit.*)
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*(.text.startup .text.startup.*)
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*(.text.hot .text.hot.*)
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*(.text .stub .text.* .gnu.linkonce.t.*)
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. = ALIGN(4);
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} > ram
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.fini : {
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} > ram
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. = ALIGN(4);
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__text_end = .;
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.rodata : {
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*(.rodata .rodata.* .rdata .rdata.* .gnu.linkonce.r.*)
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} > ram
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.rodata1 : {
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*(.rodata1)
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} > ram
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__data_start = .;
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.data : {
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*(.a0table)
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*(.data .data.* .gnu.linkonce.d.*)
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*(.data1)
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*(.got.plt)
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*(.got)
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} > ram
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. = ALIGN(4);
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__bss_start = .;
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.sbss : {
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*(.dynsbss)
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*(.sbss .sbss.* .gnu.linkonce.sb.*)
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*(.scommon)
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*(.dynbss)
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*(.bss .bss.* .gnu.linkonce.b.*)
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*(COMMON)
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} > ram
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. = ALIGN(4);
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__bss_end = .;
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__end = .;
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/DISCARD/ : { *(.MIPS.abiflags) }
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/* Everything is statically linked, so discard PLTs. */
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/DISCARD/ : { *(.rel.iplt) *(.rela.iplt) *(.rel.plt) *(.rela.plt) *(.plt) *(.iplt) }
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/* We don't make use of debugging information, so drop that, too. */
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/DISCARD/ : { *(.debug) *(.debug_srcinfo) *(.debug_sfnames) *(.debug_aranges) *(.debug_pubnames) *(.debug_info .gnu.linkonce.wi.*) *(.debug_abbrev) *(.debug_line .debug_line.* .debug_line_end ) *(.debug_frame) *(.debug_str) *(.debug_loc) *(.debug_macinfo) *(.debug_weaknames) *(.debug_funcnames) *(.debug_typenames) *(.debug_varnames) *(.debug_pubtypes) *(.debug_ranges) *(.debug_macro) *(.mdebug.abi32) *(.mdebug.abiN32) *(.mdebug.abi64) *(.mdebug.abiO64) *(.mdebug.eabi32) *(.mdebug.eabi64) }
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/* Discard things that the standard link script drops, too. */
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/DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }
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/DISCARD/ : { *(.note.gnu.build-id) }
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}

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