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authorRich Felker <dalias@aerifal.cx>2012-02-06 14:39:09 -0500
committerRich Felker <dalias@aerifal.cx>2012-02-06 14:39:09 -0500
commit4ce3cb5cddda7b4ee9643e1f75ee5b8f1f191906 (patch)
tree9861037b39b84ed346e0632aef670bf768786461 /crt/i386
parentf4ad36c4bf23899a3164ebd40ff5781c152bcb01 (diff)
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add support for init/finit (constructors and destructors)
this is mainly in hopes of supporting c++ (not yet possible for other
reasons) but will also help applications/libraries which use (and more
often, abuse) the gcc __attribute__((__constructor__)) feature in "C"
code.

x86_64 and arm versions of the new startup asm are untested and may
have minor problems.
Diffstat (limited to 'crt/i386')
-rw-r--r--crt/i386/crt1.s8
-rw-r--r--crt/i386/crti.s7
-rw-r--r--crt/i386/crtn.s5
3 files changed, 18 insertions, 2 deletions
diff --git a/crt/i386/crt1.s b/crt/i386/crt1.s
index 3e88c785..66ee11ab 100644
--- a/crt/i386/crt1.s
+++ b/crt/i386/crt1.s
@@ -1,3 +1,5 @@
+.weak _init
+.weak _fini
 .text
 .global _start
 _start:
@@ -8,8 +10,10 @@ _start:
 	pushl %esp
 	pushl %esp
 	pushl %edx
-	pushl %ebp
-	pushl %ebp
+	call 1f
+1:	addl $[_fini-.],(%esp)
+	call 1f
+1:	addl $[_init-.],(%esp)
 	pushl %eax
 	pushl %ecx
 	call 1f
diff --git a/crt/i386/crti.s b/crt/i386/crti.s
new file mode 100644
index 00000000..2eb23ed5
--- /dev/null
+++ b/crt/i386/crti.s
@@ -0,0 +1,7 @@
+.section .init
+.global _init
+_init:
+
+.section .fini
+.global _fini
+_fini:
diff --git a/crt/i386/crtn.s b/crt/i386/crtn.s
new file mode 100644
index 00000000..055451ed
--- /dev/null
+++ b/crt/i386/crtn.s
@@ -0,0 +1,5 @@
+.section .init
+	ret
+
+.section .fini
+	ret