summaryrefslogtreecommitdiff
path: root/libc/sysdeps/linux
diff options
context:
space:
mode:
authorEric Andersen <andersen@codepoet.org>2002-11-27 23:34:07 +0000
committerEric Andersen <andersen@codepoet.org>2002-11-27 23:34:07 +0000
commitae35d725cf586347b2adb1a6fe4216e70fce16cf (patch)
tree9fcdb86297695c3324e386e483e85db53133b412 /libc/sysdeps/linux
parent44c91e654102116f99f80635c483db49126730e8 (diff)
Make support for global constructors and global destructors be
configurable, so people who do not need or want ctor/dtor support can disable it and make their binaries a little bit smaller. -Erik
Diffstat (limited to 'libc/sysdeps/linux')
-rw-r--r--libc/sysdeps/linux/arm/crt0.S4
-rw-r--r--libc/sysdeps/linux/common/Makefile15
-rw-r--r--libc/sysdeps/linux/i386/crt0.S9
-rw-r--r--libc/sysdeps/linux/mips/crt0.S4
-rw-r--r--libc/sysdeps/linux/sh/crt0.S38
5 files changed, 60 insertions, 10 deletions
diff --git a/libc/sysdeps/linux/arm/crt0.S b/libc/sysdeps/linux/arm/crt0.S
index ad4865cc1..a930ff3f2 100644
--- a/libc/sysdeps/linux/arm/crt0.S
+++ b/libc/sysdeps/linux/arm/crt0.S
@@ -80,6 +80,7 @@ _start:
ldr r2,[sp, #8]
#endif
+#ifdef __UCLIBC_CTOR_DTOR__
/* Store the address of _init in r3 as an argument to main() */
ldr r3, =_init
@@ -89,6 +90,9 @@ _start:
/* Ok, now run uClibc's main() -- shouldn't return */
bl __uClibc_start_main
+#else
+ bl __uClibc_main
+#endif
/* Crash if somehow `exit' returns anyways. */
bl abort
diff --git a/libc/sysdeps/linux/common/Makefile b/libc/sysdeps/linux/common/Makefile
index f66c09f31..8e0ed9485 100644
--- a/libc/sysdeps/linux/common/Makefile
+++ b/libc/sysdeps/linux/common/Makefile
@@ -24,11 +24,6 @@
TOPDIR=../../../../
include $(TOPDIR)Rules.mak
-SAFECFLAGS=$(WARNINGS) $(CPU_CFLAGS-y) $(OPTIMIZATION) -fno-builtin
-ifeq ($(strip $(DOPIC)),y)
-SAFECFLAGS+=-fPIC
-endif
-
CSRC= waitpid.c getdnnm.c gethstnm.c getcwd.c \
mkfifo.c setegid.c wait.c getpagesize.c seteuid.c \
wait3.c setpgrp.c getdtablesize.c create_module.c ptrace.c \
@@ -44,13 +39,21 @@ COBJS=$(patsubst %.c,%.o, $(CSRC))
MSRC=syscalls.c
MOBJ=$(shell ./list_syscalls.sh)
+ifeq ($(strip $(UCLIBC_CTOR_DTOR)),y)
+CTOR_TARGETS=$(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o
+SAFECFLAGS=$(WARNINGS) $(CPU_CFLAGS-y) $(OPTIMIZATION) -fno-builtin
+ifeq ($(strip $(DOPIC)),y)
+SAFECFLAGS+=-fPIC
+endif
+endif
+
OBJ=$(COBJS) $(MOBJ)
all: $(STR_SYSCALLS) $(OBJ) $(LIBC)
$(LIBC): ar-target
-ar-target: $(OBJ) $(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o
+ar-target: $(OBJ) $(CTOR_TARGETS)
$(AR) $(ARFLAGS) $(LIBC) $(OBJ)
(cd $(TOPDIR)lib/; ln -fs crt0.o crt1.o)
diff --git a/libc/sysdeps/linux/i386/crt0.S b/libc/sysdeps/linux/i386/crt0.S
index 97f1fde63..be66b9a2d 100644
--- a/libc/sysdeps/linux/i386/crt0.S
+++ b/libc/sysdeps/linux/i386/crt0.S
@@ -61,6 +61,7 @@ _start:
pushl %ebp /* callers %ebp (frame pointer) */
movl %esp,%ebp /* mark callers stack frame as invalid */
+#ifdef __UCLIBC_CTOR_DTOR__
/* Push .init and .fini arguments to __uClibc_start_main() on the stack */
pushl $_fini
pushl $_init
@@ -72,6 +73,14 @@ _start:
/* Ok, now run uClibc's main() -- shouldn't return */
call __uClibc_start_main
+#else
+ /* Push envp, argc, and argc arguments to __uClibc_start_main() on the stack */
+ pushl %eax /* Environment pointer */
+ pushl %ebx /* Argument pointer */
+ pushl %ecx /* And the argument count */
+
+ call __uClibc_main
+#endif
/* Crash if somehow `exit' returns anyways. */
hlt
diff --git a/libc/sysdeps/linux/mips/crt0.S b/libc/sysdeps/linux/mips/crt0.S
index fd1f4b9d4..052229819 100644
--- a/libc/sysdeps/linux/mips/crt0.S
+++ b/libc/sysdeps/linux/mips/crt0.S
@@ -30,6 +30,7 @@ __start:
addu a2, a0, 1 /* argv[0] program name (ordinal->cardinal) */
sll a2, a2, 2 /* multiple by 4 */
add a2, a2, a1 /* a2 now points to start of envp */
+#ifdef __UCLIBC_CTOR_DTOR__
la a3, _init /* a3 is address of _init */
addiu sp, sp, -24 /* 16 + 4 rounded up to multiple of 8 */
/* multiple of 8 for longlong/double support */
@@ -38,6 +39,9 @@ __start:
/* Ok, now run uClibc's main() -- shouldn't return */
jal __uClibc_start_main
+#else
+ jal __uClibc_main
+#endif
addiu sp, sp, 24 /* undo stack argument */
diff --git a/libc/sysdeps/linux/sh/crt0.S b/libc/sysdeps/linux/sh/crt0.S
index e74ae86c4..a27775ed0 100644
--- a/libc/sysdeps/linux/sh/crt0.S
+++ b/libc/sysdeps/linux/sh/crt0.S
@@ -48,6 +48,34 @@ _start:
mov.l @r15+,r4
mov r15, r5
+#if ! defined __UCLIBC_CTOR_DTOR__
+ /*
+ * Setup the value for the environment pointer:
+ * r6 = (argc + 1) * 4
+ * r6 += argv (in delay slot)
+ */
+ mov r4,r6
+ add #1,r6
+ shll2 r6
+ add r5, r6
+
+ /* jump to __uClibc_main (argc, argv, envp) */
+ mov.l L_main, r0
+ jsr @r0
+ nop /* delay slot */
+
+ /* We should not get here. */
+ mov.l L_abort, r0
+ jmp @r0
+ nop
+
+_start_end:
+ .align 2
+
+L_main:
+ .long __uClibc_main /* in libuClibc.*.so */
+
+#else /* __UCLIBC_CTOR_DTOR__ */
/* Push the finip argument to __uClibc_start_main() onto the stack */
mov.l L_fini,r6
mov.l r6,@-r15
@@ -72,10 +100,12 @@ _start:
mov.l L_abort, r0
jmp @r0
nop
-
_start_end:
.align 2
+L_main:
+ .long __uClibc_start_main /* in libuClibc.*.so */
+
.weak _init
.type _init,@function
_init:
@@ -87,13 +117,13 @@ _init:
.weak _fini
.set _fini,_init
-L_main:
- .long __uClibc_start_main /* in libuClibc.*.so */
-
L_init:
.long _init
L_fini:
.long _fini
+
+#endif
+
L_abort:
.long abort