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switch to the standard gcc

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Found a bug in Intel's cross-compiler.
=> Switch to the standard gcc and use the flags "-march=i586 -mtune=i586"
=> Code runs on all Pentium (I) systems
This commit is contained in:
Stefan Lankes 2012-09-12 00:46:52 -07:00
parent 0c61f5dee1
commit 93d9540785
4 changed files with 12 additions and 10 deletions
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1
.gitignore vendored
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@ -14,6 +14,7 @@ Makefile
include/metalsvm/config.h
include/metalsvm/config.inc
tools/make_initrd
tools/scc_bootinfo.asm
newlib/examples/hello
newlib/examples/jacobi
newlib/examples/echo

8
Makefile.scc
View file

@ -12,10 +12,6 @@ STACKPROT = -fno-stack-protector
# Set your own cross compiler tool chain prefix here
CROSSCOMPREFIX =
# Uncomment both lines if compiling for the SCC!
CROSSCOMPREFIX = i386-unknown-linux-gnu-
STACKPROT =
CC_FOR_TARGET = $(CROSSCOMPREFIX)gcc
CXX_FOR_TARGET = $(CROSSCOMPREFIX)g++
GCC_FOR_TARGET = $(CROSSCOMPREFIX)gcc
@ -42,7 +38,7 @@ NASMFLAGS = -felf32 -g -i$(TOPDIR)/include/metalsvm/
INCLUDE = -I$(TOPDIR)/include -I$(TOPDIR)/arch/$(ARCH)/include -I$(TOPDIR)/lwip/src/include -I$(TOPDIR)/lwip/src/include/ipv4 -I$(TOPDIR)/drivers
# For 64bit support, you have to define "-m64 -mno-red-zone" instead of "-m32 -march=i586"
# Compiler options for final code
CFLAGS = -g -m32 -march=i586 -Wall -O2 -fstrength-reduce -fomit-frame-pointer -finline-functions -ffreestanding $(INCLUDE) $(STACKPROT)
CFLAGS = -g -m32 -march=i586 -mtune=i586 -Wall -O2 -fstrength-reduce -fomit-frame-pointer -finline-functions -ffreestanding $(INCLUDE) $(STACKPROT)
# Compiler options for debuging
#CFLAGS = -g -O -m32 -march=i586 -Wall -fomit-frame-pointer -ffreestanding $(INCLUDE) $(STACKPROT)
ARFLAGS = rsv
@ -51,7 +47,7 @@ STRIP_DEBUG = --strip-debug
KEEP_DEBUG = --only-keep-debug
OUTPUT_FORMAT = -O elf32-i386
# For 64bit support, you have to define -m64 instead of "-m32 -march=i586"
CFLAGS_FOR_NEWLIB = -m32 -march=i586 -O2 $(STACKPROT)
CFLAGS_FOR_NEWLIB = -m32 -march=i586 -mtune=i586 -O2 $(STACKPROT)
# For 64bit support, you have to define -m64 instead of "-m32 -march=i586"
LDFLAGS_FOR_NEWLIB = -m32 -march=i586
# For 64bit support, you have to define -m64 instead of "-m32"

9
tools/Makefile
View file

@ -1,10 +1,10 @@
MAKE = make
CC = gcc
CROSS_COMPILE=i386-unknown-linux-gnu-gcc
CROSS_OBJCOPY=i386-unknown-linux-gnu-objcopy
CROSS_COMPILE=gcc
CROSS_OBJCOPY=objcopy
CFLAGS = -m32 -O2 -Wall
LDFLGAS =
DEFINES=
DEFINES =
NASM = nasm
NASMFLAGS = -fbin
EXECFILES = $(shell find ../newlib/examples -perm -u+r+x -type f)
@ -33,6 +33,9 @@ smp_setup.hex: smp_setup.bin
scc_setup.bin: scc_setup.asm
$(NASM) $(NASMFLAGS) -o $@ $<
reset_vector.o: reset_vector.S
gcc -m32 -c -o reset_vector.o reset_vector.S
reset_vector.bin: reset_vector.o
ld --oformat binary -Ttext 0 -melf_i386 -o $@ $<

4
tools/reset_vector.S
View file

@ -3,6 +3,8 @@
* Copyright (c) 2004 Fabrice Bellard
*/
// MetalSVM reuses the same routine to launch its preloaded kernel
#define LOAD_SEG 0x9000
// define CONFIG_MCEMU_DEBUG 1
.code16
@ -36,4 +38,4 @@ _realstart:
_start:
jmp _realstart
_end:
.fill 4096 - _end, 1, 0
.fill 4096 - $, 1, 0