Start implementation of a statically linked standard C library:

 - Add implementation of network-related syscalls

diff --git a/libc/Makefile b/libc/Makefile
new file mode 100644 (file)
index 0000000..5029bad
--- /dev/null
+++ b/libc/Makefile
@@ -0,0 +1,16 @@
+OUTPUT = libc.a
+OBJECTS = syscall.o
+PHONY = clean
+INCLUDES = -I../include
+CFLAGS = -m32 -Wall -nostdlib -nodefaultlibs -nostartfiles -ffreestanding $(INCLUDES)
+ASFLAGS = $(CFLAGS)
+
+all: $(OUTPUT)
+
+$(OUTPUT): $(OBJECTS)
+       ar -rc $@ $^
+
+clean:
+       rm -rf $(OUTPUT) $(OBJECTS)
+
+.PHONY: $(PHONY)

diff --git a/libc/syscall.S b/libc/syscall.S
new file mode 100644 (file)
index 0000000..f1321ab
--- /dev/null
+++ b/libc/syscall.S
@@ -0,0 +1,188 @@
+#define __ASSEMBLY_SOURCE
+
+#include <corax/syscall.h>
+
+.global socket
+socket:
+       pushl   %ebx
+
+       movl    $SYS_SOCKET, %eax
+       movl    8(%esp), %ebx
+       movl    12(%esp), %ecx
+       movl    16(%esp), %edx
+       int             $SYSCALL_CXNET
+
+       popl    %ebx
+       ret
+
+.global close
+close:
+       pushl   %ebx
+
+       movl    $SYS_CLOSE, %eax
+       movl    8(%esp), %ebx
+       int             $SYSCALL_CXNET
+
+       popl    %ebx
+       ret
+
+.global sendto
+sendto:
+       /*
+        * sendto() and recvfrom() have 6 arguments, so we also have
+        * to preserve the ebp register in order to repurpose it
+        */
+       pushl   %ebx
+       pushl   %ebp
+
+       movl    $SYS_SENDTO, %eax
+       movl    12(%esp), %ebx
+       movl    16(%esp), %ecx
+       movl    20(%esp), %edx
+       movl    24(%esp), %esi
+       movl    28(%esp), %edi
+       movl    32(%esp), %ebp
+       int             $SYSCALL_CXNET
+
+       popl    %ebp
+       popl    %ebx
+       ret
+
+.global recvfrom
+recvfrom:
+       pushl   %ebx
+       pushl   %ebp
+
+       movl    $SYS_RECVFROM, %eax
+       movl    12(%esp), %ebx
+       movl    16(%esp), %ecx
+       movl    20(%esp), %edx
+       movl    24(%esp), %esi
+       movl    28(%esp), %edi
+       movl    32(%esp), %ebp
+       int             $SYSCALL_CXNET
+
+       popl    %ebp
+       popl    %ebx
+       ret
+
+.global connect
+connect:
+       pushl   %ebx
+
+       movl    $SYS_CONNECT, %eax
+       movl    8(%esp), %ebx
+       movl    12(%esp), %ecx
+       movl    16(%esp), %edx
+       int             $SYSCALL_CXNET
+
+       popl    %ebx
+       ret
+
+.global listen
+listen:
+       pushl   %ebx
+
+       movl    $SYS_LISTEN, %eax
+       movl    8(%esp), %ebx
+       movl    12(%esp), %ecx
+       int             $SYSCALL_CXNET
+
+       popl    %ebx
+       ret
+
+.global accept
+accept:
+       pushl   %ebx
+
+       movl    $SYS_ACCEPT, %eax
+       movl    8(%esp), %ebx
+       movl    12(%esp), %ecx
+       movl    16(%esp), %edx
+       int             $SYSCALL_CXNET
+
+       popl    %ebx
+       ret
+
+.global setsockopt
+setsockopt:
+       pushl   %ebx
+
+       movl    $SYS_SETSOCKOPT, %eax
+       movl    8(%esp), %ebx
+       movl    12(%esp), %ecx
+       movl    16(%esp), %edx
+       movl    20(%esp), %esi
+       movl    24(%esp), %edi
+       int             $SYSCALL_CXNET
+
+       popl    %ebx
+       ret
+
+.global getsockopt
+getsockopt:
+       pushl   %ebx
+
+       movl    $SYS_GETSOCKOPT, %eax
+       movl    8(%esp), %ebx
+       movl    12(%esp), %ecx
+       movl    16(%esp), %edx
+       movl    20(%esp), %esi
+       movl    24(%esp), %edi
+       int             $SYSCALL_CXNET
+
+       popl    %ebx
+       ret
+
+.global shutdown
+shutdown:
+       pushl   %ebx
+
+       movl    $SYS_SHUTDOWN, %eax
+       movl    8(%esp), %ebx
+       movl    12(%esp), %ecx
+       int             $SYSCALL_CXNET
+
+       popl    %ebx
+       ret
+
+.global select
+select:
+       pushl   %ebx
+
+       movl    $SYS_SELECT, %eax
+       movl    8(%esp), %ebx
+       movl    12(%esp), %ecx
+       movl    16(%esp), %edx
+       movl    20(%esp), %esi
+       movl    24(%esp), %edi
+       int             $SYSCALL_CXNET
+
+       popl    %ebx
+       ret
+
+.global poll
+poll:
+       pushl   %ebx
+
+       movl    $SYS_POLL, %eax
+       movl    8(%esp), %ebx
+       movl    12(%esp), %ecx
+       movl    16(%esp), %edx
+       int             $SYSCALL_CXNET
+
+       popl    %ebx
+       ret
+
+.global bind
+bind:
+       pushl   %ebx
+
+       movl    $SYS_BIND, %eax
+       movl    8(%esp), %ebx
+       movl    12(%esp), %ecx
+       movl    16(%esp), %edx
+       int             $SYSCALL_CXNET
+
+       popl    %ebx
+       ret