From: John Hodge <tpg@mutabah.net>
Date: Thu, 6 Oct 2011 15:18:26 +0000 (+0800)
Subject: Usermode/libc - Look ma! setjmp
X-Git-Tag: rel0.11~23
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=edf4c879ac931092da63389e186f06f08e324680;p=tpg%2Facess2.git

Usermode/libc - Look ma! setjmp
---

diff --git a/Usermode/Libraries/libc.so_src/Makefile b/Usermode/Libraries/libc.so_src/Makefile
index 29863015..8d9960c6 100644
--- a/Usermode/Libraries/libc.so_src/Makefile
+++ b/Usermode/Libraries/libc.so_src/Makefile
@@ -8,9 +8,10 @@ CFLAGS   +=
 ASFLAGS  +=
 LDFLAGS  += -soname libc.so -Map map.txt -lgcc
 
-OBJ = stub.o heap.o stdlib.o env.o fileIO.o string.o select.o
-DEPFILES := $(OBJ:%.o=%.d)
+OBJ  = stub.o heap.o stdlib.o env.o fileIO.o string.o select.o
+OBJ += arch/$(ARCHDIR).ao
 # signals.o
+DEPFILES := $(OBJ:%.o=%.d)
 BIN = libc.so
 
 include ../Makefile.tpl
diff --git a/Usermode/Libraries/libc.so_src/arch/x86.asm b/Usermode/Libraries/libc.so_src/arch/x86.asm
new file mode 100644
index 00000000..f95f28f1
--- /dev/null
+++ b/Usermode/Libraries/libc.so_src/arch/x86.asm
@@ -0,0 +1,49 @@
+; 
+; Acess2 C Library
+; - By John Hodge (thePowersGang)
+; 
+; arch/x86.asm
+; - x86 specific code
+[bits 32]
+[section .text]
+
+[global setjmp]
+setjmp:
+	mov eax, [esp+4]	; Get base of buffer
+	
+	mov [eax+0x00], eax
+	mov [eax+0x04], ecx
+	mov [eax+0x08], edx
+	mov [eax+0x0C], ebx
+	mov [eax+0x10], esi
+	mov [eax+0x14], edi
+	mov [eax+0x18], esp
+	mov [eax+0x1C], ebp
+	
+	xor eax, eax
+	ret
+setjmp.restore:
+	ret
+
+[global longjmp]
+longjmp:
+	mov ebp, [esp+4]	; jmp_buf
+	mov eax, [esp+8]	; value
+	
+	;mov eax, [ebp+0x00]
+	mov ecx, [ebp+0x04]
+	mov edx, [ebp+0x08]
+	mov ebx, [ebp+0x0C]
+	mov esi, [ebp+0x10]
+	mov edi, [ebp+0x14]
+	mov esp, [ebp+0x18]
+	mov ebp, [ebp+0x1C]
+	
+	test eax, eax
+	jnz .ret
+	inc eax
+
+	; Return to where setjmp was called
+.ret:
+	ret
+
diff --git a/Usermode/Libraries/libc.so_src/arch/x86_64.asm b/Usermode/Libraries/libc.so_src/arch/x86_64.asm
new file mode 100644
index 00000000..36d864c2
--- /dev/null
+++ b/Usermode/Libraries/libc.so_src/arch/x86_64.asm
@@ -0,0 +1,62 @@
+; 
+; Acess2 C Library
+; - By John Hodge (thePowersGang)
+; 
+; arch/x86_64.asm
+; - x86_64 specific code
+[bits 64]
+[section .text]
+
+[global setjmp]
+setjmp:
+	;mov [rdi+0x00], rax
+	mov [rdi+0x08], rcx
+	mov [rdi+0x10], rdx
+	mov [rdi+0x18], rbx
+	mov [rdi+0x20], rsi
+	mov [rdi+0x28], rdi
+	mov [rdi+0x30], rsp
+	mov [rdi+0x38], rbp
+	mov [rdi+0x40], r8
+	mov [rdi+0x48], r9
+	mov [rdi+0x50], r10
+	mov [rdi+0x58], r11
+	mov [rdi+0x60], r12
+	mov [rdi+0x68], r13
+	mov [rdi+0x70], r14
+	mov [rdi+0x78], r15
+	
+	xor eax, eax
+	ret
+setjmp.restore:
+	ret
+
+[global longjmp]
+longjmp:
+	mov rax, rsi
+	
+	;mov rax, [rdi+0x00]
+	mov rcx, [rdi+0x08]
+	mov rdx, [rdi+0x10]
+	mov rbx, [rdi+0x18]
+	mov rsi, [rdi+0x20]
+	mov rdi, [rdi+0x28]
+	mov rsp, [rdi+0x30]
+	mov rbp, [rdi+0x38]
+	mov r8,  [rdi+0x40]
+	mov r9,  [rdi+0x48]
+	mov r10, [rdi+0x50]
+	mov r11, [rdi+0x58]
+	mov r12, [rdi+0x60]
+	mov r13, [rdi+0x68]
+	mov r14, [rdi+0x70]
+	mov r15, [rdi+0x78]
+	
+	test eax, eax
+	jnz .ret
+	inc eax
+
+	; Return to where setjmp was called
+.ret:
+	ret
+
diff --git a/Usermode/Libraries/libc.so_src/select.c b/Usermode/Libraries/libc.so_src/select.c
new file mode 100644
index 00000000..c42848c4
--- /dev/null
+++ b/Usermode/Libraries/libc.so_src/select.c
@@ -0,0 +1,35 @@
+/*
+ * Acess2 C Library
+ * - By John Hodge (thePowersGang)
+ *
+ * select.c
+ */
+
+//#include <sys/select.h>
+#include <sys/types.h>
+
+void FD_ZERO(fd_set *fdsetp)
+{
+	int i = FD_SETSIZE/16;
+	while( i-- )
+		fdsetp->flags[i]=0;
+}
+
+void FD_CLR(int fd, fd_set *fdsetp)
+{
+	if(fd < 0 || fd > FD_SETSIZE)	return;
+	fdsetp->flags[fd/16] &= (fd_set_ent_t) ((~1 << (fd%16))) & 0xFFFF;
+}
+
+void FD_SET(int fd, fd_set *fdsetp)
+{
+	if(fd < 0 || fd > FD_SETSIZE)	return;
+	fdsetp->flags[fd/16] |= (fd_set_ent_t) (1 << (fd%16));
+}
+
+int FD_ISSET(int fd, fd_set *fdsetp)
+{
+	if(fd < 0 || fd > FD_SETSIZE)	return 0;
+	return !!( fdsetp->flags[fd/16] & (1<<(fd%16)) );
+}
+
diff --git a/Usermode/include/setjmp.h b/Usermode/include/setjmp.h
new file mode 100644
index 00000000..53f3fbf2
--- /dev/null
+++ b/Usermode/include/setjmp.h
@@ -0,0 +1,23 @@
+/*
+ * Acess2 LibC
+ * - By John Hodge (thePowersGang)
+ * 
+ * setjmp.h
+ * - setjmp/longjmp support
+ */
+#ifndef _LIBC_SETJMP_H_
+#define _LIBC_SETJMP_H_
+
+#if ARCHDIR_is_x86
+typedef uint32_t	jmp_buf[8];
+#elif ARCHDIR_is_x86_64
+typedef uint64_t	jmp_buf[16];
+#else
+# error "Unknown Architecture"
+#endif
+
+extern int	setjmp(jmp_buf buf);
+extern void	longjmp(jmp_buf buf, int val);
+
+#endif
+
diff --git a/Usermode/include/sys/types.h b/Usermode/include/sys/types.h
index edcaa224..687457e4 100644
--- a/Usermode/include/sys/types.h
+++ b/Usermode/include/sys/types.h
@@ -12,7 +12,7 @@ typedef struct stat	t_fstat;
 
 typedef unsigned long	pid_t;
 typedef unsigned long	tid_t;
-typedef signed long long	time_t;
+typedef signed long long int	time_t;
 
 typedef unsigned int	uint;