From ae97a89e1a1a9833080dccc81f6cd26784e1b964 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Thu, 11 Jan 2001 11:42:17 +0000
Subject: A large update from Manuel Novoa III <mnovoa3@bellsouth.net>.

---
 libc/sysdeps/linux/arm/Makefile                  |  8 ++---
 libc/sysdeps/linux/common/Makefile               | 26 ++++++++++++---
 libc/sysdeps/linux/common/str_syscalls.sh        | 35 ++++++++++++++++++++
 libc/sysdeps/linux/common/syscalls.c             | 32 +++++++++++++++++-
 libc/sysdeps/linux/common/unified_syscall_i386.h | 41 ++++++++++++++++++++++++
 libc/sysdeps/linux/i386/Makefile                 | 13 +++++---
 libc/sysdeps/linux/i386/__init_brk.c             | 33 +++++++++++++++++++
 libc/sysdeps/linux/i386/__uClibc_syscall.S       | 39 ++++++++++++++++++++++
 libc/sysdeps/linux/i386/brk.c                    | 32 ++++++++++++++++++
 libc/sysdeps/linux/i386/sbrk.c                   | 35 ++++++++++++++++++++
 10 files changed, 279 insertions(+), 15 deletions(-)
 create mode 100755 libc/sysdeps/linux/common/str_syscalls.sh
 create mode 100644 libc/sysdeps/linux/common/unified_syscall_i386.h
 create mode 100644 libc/sysdeps/linux/i386/__init_brk.c
 create mode 100644 libc/sysdeps/linux/i386/__uClibc_syscall.S
 create mode 100644 libc/sysdeps/linux/i386/brk.c
 create mode 100644 libc/sysdeps/linux/i386/sbrk.c

(limited to 'libc/sysdeps')

diff --git a/libc/sysdeps/linux/arm/Makefile b/libc/sysdeps/linux/arm/Makefile
index db3cf1966..7d901b769 100644
--- a/libc/sysdeps/linux/arm/Makefile
+++ b/libc/sysdeps/linux/arm/Makefile
@@ -41,12 +41,12 @@ $(LIBC): ar-target
 ar-target: $(OBJS)
 	$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
 
-$(SOBJS):
-	$(CC) $(CFLAGS) $< -c $*.S -o $*.o
+$(SOBJS): %.o : %.S
+	$(CC) $(CFLAGS) -c $< -o $@
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
-$(COBJS):
-	$(CC) $(CFLAGS) $< -c $*.c -o $*.o
+$(COBJS): %.o : %.c
+	$(CC) $(CFLAGS) -c $< -o $@
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
 clean:
diff --git a/libc/sysdeps/linux/common/Makefile b/libc/sysdeps/linux/common/Makefile
index 73190ac9c..3a66e4c2e 100644
--- a/libc/sysdeps/linux/common/Makefile
+++ b/libc/sysdeps/linux/common/Makefile
@@ -25,7 +25,6 @@ TOPDIR=../../../
 include $(TOPDIR)Rules.mak
 LIBC=$(TOPDIR)libc.a
 
-
 CSRC =closedir.c dirfd.c getdents.c getdnnm.c gethstnm.c getpagesize.c \
 	isatty.c kernel_version.c mkfifo.c opendir.c readdir.c rewinddir.c \
 	seekdir.c setegid.c seteuid.c setpgrp.c statfix.c tell.c telldir.c \
@@ -40,7 +39,16 @@ MOBJ=$(shell ./list_syscalls.sh)
 
 OBJ=$(COBJS) $(NIOBJS) $(MOBJ)
 
-all: $(OBJ) $(LIBC)
+UNIFIED_SYSCALL_HEADER = /dev/null
+STR_SYSCALLS =
+ifeq ($(UNIFIED_SYSCALL),true)
+	ifeq ($(TARGET_ARCH), i386)
+		UNIFIED_SYSCALL_HEADER = unified_syscall_i386.h
+		STR_SYSCALLS = str_syscalls
+	endif
+endif
+
+all: $(STR_SYSCALLS) unified_syscall.h $(OBJ) $(LIBC)
 
 $(LIBC): ar-target
 
@@ -51,14 +59,22 @@ $(MOBJ): $(MSRC)
 	$(CC) $(CFLAGS) -DL_$* $< -c -o $*.o
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
-$(COBJS):
-	$(CC) $(CFLAGS) $< -c $*.c -o $*.o
+$(COBJS): %.o : %.c
+	$(CC) $(CFLAGS) -c $< -o $@
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
 $(NIOBJS):
 	$(CC) $(CFLAGS) $< -c $*.c -o $*.o -fno-inline
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
+str_syscalls:
+	./str_syscalls.sh > str_syscalls.c
+	gcc str_syscalls.c -o str_syscalls
+	./str_syscalls > str_syscalls.h
+
+unified_syscall.h:
+	cat $(UNIFIED_SYSCALL_HEADER) > unified_syscall.h
+
 clean:
-	rm -f *.[oa] *~ core
+	rm -f *.[oa] *~ core unified_syscall.h str_syscalls.[ch] str_syscalls
 
diff --git a/libc/sysdeps/linux/common/str_syscalls.sh b/libc/sysdeps/linux/common/str_syscalls.sh
new file mode 100755
index 000000000..66ef6824d
--- /dev/null
+++ b/libc/sysdeps/linux/common/str_syscalls.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+echo "#include <stdio.h>"
+echo "#include <stdlib.h>"
+echo "#include \"../include/asm/unistd.h\""
+echo
+echo "int main(void) {"
+echo
+echo "#define __NR__exit __NR_exit"
+echo "#define __NR___open __NR_open"
+echo "#define __NR__ioctl __NR_ioctl"
+echo "#define __NR__fcntl __NR_fcntl"
+echo "#define __NR__reboot __NR_reboot"
+echo "#define __NR__mmap __NR_mmap"
+echo "#define __NR__syslog __NR_syslog"
+echo "#define __NR__stat __NR_stat"
+echo "#define __NR__lstat __NR_lstat"
+echo "#define __NR__fstat __NR_fstat"
+echo "#define __NR__getdents __NR_getdents"
+echo
+sed -ne 's/^.*_syscall[0-9].*([^,]*, *\([^,)]*\).*/printf("#define __STR_NR_\1 \\\"%d\\\"\\n", __NR_\1);/gp' syscalls.c
+echo
+echo "printf(\"#define __STR_NR_exit     __STR_NR__exit\n\");"
+echo "printf(\"#define __STR_NR_open    __STR_NR___open\n\");"
+echo "printf(\"#define __STR_NR_ioctl    __STR_NR__ioctl\n\");"
+echo "printf(\"#define __STR_NR_fcntl    __STR_NR__fcntl\n\");"
+echo "printf(\"#define __STR_NR_reboot   __STR_NR__reboot\n\");"
+echo "printf(\"#define __STR_NR_mmap     __STR_NR__mmap\n\");"
+echo "printf(\"#define __STR_NR_syslog   __STR_NR__syslog\n\");"
+echo "printf(\"#define __STR_NR_stat     __STR_NR__stat\n\");"
+echo "printf(\"#define __STR_NR_lstat    __STR_NR__lstat\n\");"
+echo "printf(\"#define __STR_NR_fstat    __STR_NR__fstat\n\");"
+echo "printf(\"#define __STR_NR_getdents __STR_NR__getdents\n\");"
+echo
+echo "return EXIT_SUCCESS; }"
diff --git a/libc/sysdeps/linux/common/syscalls.c b/libc/sysdeps/linux/common/syscalls.c
index 2f9fb723d..e726ba7fc 100644
--- a/libc/sysdeps/linux/common/syscalls.c
+++ b/libc/sysdeps/linux/common/syscalls.c
@@ -26,13 +26,18 @@
 #include <sys/types.h>
 #include <sys/syscall.h>
 
+#define uClibc_syscall_exit(void, _exit, int, status) \
+_syscall1(void, _exit, int, status)
+
+
+#include "unified_syscall.h"
 
 //#define __NR_exit             1
 #ifdef L__exit
 /* Do not include unistd.h, so gcc doesn't whine about 
  * _exit returning.  It really doesn't return... */
 #define __NR__exit __NR_exit
-_syscall1(void, _exit, int, status);
+uClibc_syscall_exit(void, _exit, int, status);
 #endif
 
 //#define __NR_fork             2
@@ -347,6 +352,9 @@ _syscall2(int, umount2, const char *, special_file, int, flags);
 #include <stdarg.h>
 #include <sys/ioctl.h>
 #define __NR__ioctl __NR_ioctl
+
+extern int _ioctl(int fd, int request, void *arg);
+
 _syscall3(int, _ioctl, int, fd, int, request, void *, arg);
 
 int ioctl(int fd, unsigned long int request, ...)
@@ -368,6 +376,9 @@ int ioctl(int fd, unsigned long int request, ...)
 #include <stdarg.h>
 #include <fcntl.h>
 #define __NR__fcntl __NR_fcntl
+
+extern int _fcntl(int fd, int cmd, long arg);
+
 _syscall3(int, _fcntl, int, fd, int, cmd, long, arg);
 
 int fcntl(int fd, int command, ...)
@@ -558,6 +569,9 @@ _syscall2(int, swapon, const char *, path, int, swapflags);
 //#define __NR_reboot           88
 #ifdef L__reboot
 #define __NR__reboot __NR_reboot
+
+extern int _reboot(int magic, int magic2, int flag);
+
 _syscall3(int, _reboot, int, magic, int, magic2, int, flag);
 
 int reboot(int flag)
@@ -574,6 +588,8 @@ int reboot(int flag)
 #include <unistd.h>
 #include <sys/mman.h>
 
+extern __ptr_t _mmap(unsigned long *buffer);
+
 _syscall1(__ptr_t, _mmap, unsigned long *, buffer);
 
 __ptr_t mmap(__ptr_t addr, size_t len, int prot,
@@ -667,6 +683,9 @@ _syscall2(int, socketcall, int, call, unsigned long *, args);
 #ifdef L__syslog
 #include <unistd.h>
 #define __NR__syslog		__NR_syslog
+
+extern int _syslog(int type, char *buf, int len);
+
 _syscall3(int, _syslog, int, type, char *, buf, int, len);
 
 int klogctl(int type, char *buf, int len)
@@ -694,6 +713,8 @@ _syscall2(int, getitimer, enum __itimer_which, which, struct itimerval *, value)
 #define __NR__stat __NR_stat
 #include <unistd.h>
 #include "statfix.h"
+extern int _stat(const char *file_name, struct kernel_stat *buf);
+
 _syscall2(int, _stat, const char *, file_name, struct kernel_stat *, buf);
 
 int stat(const char * file_name, struct libc_stat * cstat)
@@ -713,6 +734,8 @@ int stat(const char * file_name, struct libc_stat * cstat)
 #define __NR__lstat __NR_lstat
 #include <unistd.h>
 #include "statfix.h"
+extern int _lstat(const char *file_name, struct kernel_stat *buf);
+
 _syscall2(int, _lstat, const char *, file_name, struct kernel_stat *, buf);
 
 int lstat(const char * file_name, struct libc_stat * cstat)
@@ -732,6 +755,8 @@ int lstat(const char * file_name, struct libc_stat * cstat)
 #define __NR__fstat __NR_fstat
 #include <unistd.h>
 #include "statfix.h"
+extern int _fstat(int filedes, struct kernel_stat *buf);
+
 _syscall2(int, _fstat, int, filedes, struct kernel_stat *, buf);
 
 int fstat(int fd, struct libc_stat *cstat) 
@@ -878,6 +903,8 @@ SYSCALL__(setfsuid, 1)
 #endif
 //#define __NR__llseek          140
 #ifdef L__llseek
+extern int _llseek(int fd, off_t hoff, off_t loff, loff_t *res, int whence);
+
 _syscall5(int, _llseek, int, fd, off_t, hoff, off_t, loff, loff_t *, res,
 		  int, whence);
 
@@ -904,6 +931,9 @@ _syscall3(int, _getdents, int, fd, char *, dirp, size_t, count);
 //#define __NR__newselect       142
 #ifdef L__newselect
 #include <unistd.h>
+extern int _newselect(int n, fd_set *readfds, fd_set *writefds,
+					  fd_set *exceptfds, struct timeval *timeout);
+
 _syscall5(int, _newselect, int, n, fd_set *, readfds, fd_set *, writefds,
 		  fd_set *, exceptfds, struct timeval *, timeout);
 
diff --git a/libc/sysdeps/linux/common/unified_syscall_i386.h b/libc/sysdeps/linux/common/unified_syscall_i386.h
new file mode 100644
index 000000000..793337af7
--- /dev/null
+++ b/libc/sysdeps/linux/common/unified_syscall_i386.h
@@ -0,0 +1,41 @@
+#undef _syscall0
+#undef _syscall1
+#undef _syscall2
+#undef _syscall3
+#undef _syscall4
+#undef _syscall5
+
+#include "str_syscalls.h"
+
+#undef uClibc_syscall_exit
+#define uClibc_syscall_exit(type,name,type1,arg1) \
+__asm__ ( \
+".text\n.align 4\n.global "###name"\n"#name":;\npushl %ebp;\n" \
+"movl %esp,%ebp;\nsubl $4,%esp;\npushl %ebx;\nmovl 8(%ebp),%ebx;\n" \
+"jmp _start_exit" \
+)
+
+#define unified_syscall_body(name) \
+__asm__ ( \
+".text\n.align 4\n.global "###name"\n"#name":\nmovb $"__STR_NR_##name \
+",%al;\n jmp __uClibc_syscall" \
+)
+
+#define _syscall0(type,name) \
+unified_syscall_body(name)
+
+#define _syscall1(type,name,type1,arg1) \
+unified_syscall_body(name)
+
+#define _syscall2(type,name,type1,arg1,type2,arg2) \
+unified_syscall_body(name)
+
+#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
+unified_syscall_body(name)
+
+#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
+unified_syscall_body(name)
+
+#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
+unified_syscall_body(name)
+
diff --git a/libc/sysdeps/linux/i386/Makefile b/libc/sysdeps/linux/i386/Makefile
index f4520b4ac..9c487bfd1 100644
--- a/libc/sysdeps/linux/i386/Makefile
+++ b/libc/sysdeps/linux/i386/Makefile
@@ -26,9 +26,12 @@ LIBC=$(TOPDIR)libc.a
 ASFLAGS=$(CFLAGS)
 
 SSRC=_start.S longjmp.S setjmp.S #_start.S #clone.S
+ifeq ($(UNIFIED_SYSCALL),true)
+	SSRC += __uClibc_syscall.S
+endif
 SOBJS=$(patsubst %.S,%.o, $(SSRC))
 
-CSRC=fork.c vfork.c
+CSRC=fork.c vfork.c __init_brk.c brk.c sbrk.c
 COBJS=$(patsubst %.c,%.o, $(CSRC))
 
 OBJS=$(SOBJS) $(COBJS)
@@ -41,12 +44,12 @@ $(LIBC): ar-target
 ar-target: $(OBJS)
 	$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
 
-$(SOBJS): 
-	$(CC) $(CFLAGS) $< -c $*.S -o $*.o
+$(SOBJS): %.o : %.S
+	$(CC) $(CFLAGS) -c $< -o $@
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
-$(COBJS):
-	$(CC) $(CFLAGS) $< -c $*.c -o $*.o
+$(COBJS): %.o : %.c
+	$(CC) $(CFLAGS) -c $< -o $@
 	$(STRIPTOOL) -x -R .note -R .comment $*.o
 
 clean:
diff --git a/libc/sysdeps/linux/i386/__init_brk.c b/libc/sysdeps/linux/i386/__init_brk.c
new file mode 100644
index 000000000..c2ae482dd
--- /dev/null
+++ b/libc/sysdeps/linux/i386/__init_brk.c
@@ -0,0 +1,33 @@
+/* From libc-5.3.12 */
+
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <errno.h>
+
+void * ___brk_addr = 0;
+
+int
+__init_brk ()
+{
+    if (___brk_addr == 0)
+    {
+#if defined(__PIC__) || defined (__pic__)
+	__asm__ volatile ("pushl %%ebx\n\t"
+			  "movl $0,%%ebx\n\t"
+			  "int $0x80\n\t"
+			  "popl %%ebx"
+		:"=a" (___brk_addr)
+		:"0" (SYS_brk));
+#else
+	__asm__ volatile ("int $0x80"
+		:"=a" (___brk_addr)
+		:"0" (SYS_brk),"b" (0));
+#endif
+	if (___brk_addr == 0)
+	{
+	  errno = ENOMEM;
+	  return -1;
+	}
+    }
+    return 0;
+}
diff --git a/libc/sysdeps/linux/i386/__uClibc_syscall.S b/libc/sysdeps/linux/i386/__uClibc_syscall.S
new file mode 100644
index 000000000..ecf2d6350
--- /dev/null
+++ b/libc/sysdeps/linux/i386/__uClibc_syscall.S
@@ -0,0 +1,39 @@
+.globl __uClibc_syscall
+
+.text
+	.align 4
+__uClibc_syscall:
+	pushl %ebp
+	movl %esp,%ebp
+	subl $8,%esp
+	pushl %edi
+	pushl %esi
+	pushl %ebx
+	/* movl $21,%eax */
+	and $0xff,%eax
+	movl 8(%ebp),%ebx
+	movl 12(%ebp),%ecx
+	movl 16(%ebp),%edx
+	movl 20(%ebp),%esi
+	movl 24(%ebp),%edi
+#APP
+	int $0x80
+#NO_APP
+	movl %eax,-4(%ebp)
+	.p2align 4,,7
+	cmpl $-126,-4(%ebp)
+	jbe .L5
+	movl -4(%ebp),%eax
+	negl %eax
+	movl %eax,errno
+	movl $-1,-4(%ebp)
+.L5:
+	movl -4(%ebp),%edx
+	movl %edx,-8(%ebp)
+	movl -8(%ebp),%eax
+	leal -20(%ebp),%esp
+	popl %ebx
+	popl %esi
+	popl %edi
+	leave
+	ret
diff --git a/libc/sysdeps/linux/i386/brk.c b/libc/sysdeps/linux/i386/brk.c
new file mode 100644
index 000000000..2a776bac1
--- /dev/null
+++ b/libc/sysdeps/linux/i386/brk.c
@@ -0,0 +1,32 @@
+/* From libc-5.3.12 */
+
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <errno.h>
+
+extern void * ___brk_addr;
+
+extern int __init_brk ();
+
+int brk(void * end_data_seg)
+{
+    if (__init_brk () == 0)
+    {
+#if defined(__PIC__) || defined (__pic__)
+	__asm__ volatile ("pushl %%ebx\n\t"
+			  "movl %%ecx,%%ebx\n\t"
+			  "int $0x80\n\t"
+			  "popl %%ebx"
+		:"=a" (___brk_addr)
+		:"0" (SYS_brk),"c" (end_data_seg));
+#else
+	__asm__ volatile ("int $0x80"
+		:"=a" (___brk_addr)
+		:"0" (SYS_brk),"b" (end_data_seg));
+#endif
+	if (___brk_addr == end_data_seg)
+		return 0;
+	errno = ENOMEM;
+    }
+    return -1;
+}
diff --git a/libc/sysdeps/linux/i386/sbrk.c b/libc/sysdeps/linux/i386/sbrk.c
new file mode 100644
index 000000000..f5099d7e8
--- /dev/null
+++ b/libc/sysdeps/linux/i386/sbrk.c
@@ -0,0 +1,35 @@
+/* From libc-5.3.12 */
+
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <errno.h>
+
+extern void * ___brk_addr;
+
+extern int __init_brk (void);
+
+void *
+sbrk(ptrdiff_t increment)
+{
+    if (__init_brk () == 0)
+    {
+	void * tmp = ___brk_addr+increment;
+#if defined(__PIC__) || defined (__pic__)
+	__asm__ volatile ("pushl %%ebx\n\t"
+			  "movl %%ecx,%%ebx\n\t"
+                          "int $0x80\n\t"
+                          "popl %%ebx"
+		:"=a" (___brk_addr)
+		:"0" (SYS_brk),"c" (tmp));
+#else
+	__asm__ volatile ("int $0x80"
+		:"=a" (___brk_addr)
+		:"0" (SYS_brk),"b" (tmp));
+#endif
+	if (___brk_addr == tmp)
+		return tmp-increment;
+	errno = ENOMEM;
+	return ((void *) -1);
+    }
+    return ((void *) -1);
+}
-- 
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