ref: 04eaa4bdf25f5d142a47eed13dff69a5cf4497e1
parent: d7f0e25b97d041a2645e2d90f6033949b01c7cc6
author: zerous Naveen Narayanan <zerous@nocebo.space>
date: Tue Sep 3 20:28:47 EDT 2019
Add gensys.sh and syscall.lst for i386
--- a/src/libc/arch/i386/linux/Makefile
+++ b/src/libc/arch/i386/linux/Makefile
@@ -3,14 +3,30 @@
include $(PROJECTDIR)/scripts/rules.mk
include ../../../rules.mk
-OBJS = crt.o
+OBJS =\
+ _Exit.o\
+ _close.o\
+ _open.o\
+ _read.o\
+ _write.o\
+ _lseek.o\
+ _brk.o\
+ _sigaction.o\
+ _getpid.o\
+ _Exit.o\
+ _kill.o\
+ crt.o\
-all:
+all: syscall
$(MAKE) objs
objs: $(OBJS)
crt.o: ../crt-posix.s
+
+syscall: syscall.lst
+ gensys.sh syscall.lst
+ touch syscall
clean:
rm -f `awk '/[0-9]* _/ {print $$2".s"}' syscall.lst`--- /dev/null
+++ b/src/libc/arch/i386/linux/gensys.sh
@@ -1,0 +1,20 @@
+#!/bin/sh
+#
+# This job is very easy because app and kernel ABI are identical
+# until the 4th parameter, so we only have to set the syscall
+# number in eax
+
+sed 's/[ ]*#.*//
+ /^$/d' syscall.lst |
+while read num name
+do
+cat <<EOF > $name.s
+ .file "$name.s"
+
+ .globl $name
+$name:
+ movl \$$num,%eax
+ syscall
+ jmp _cerrno
+EOF
+done
--- /dev/null
+++ b/src/libc/arch/i386/linux/syscall.lst
@@ -1,0 +1,11 @@
+#number name
+3 _read
+4 _write
+5 _open
+6 _close
+19 _lseek
+45 _brk
+67 _sigaction
+20 _getpid
+1 _Exit
+37 _kill