From 4ce3cb5cddda7b4ee9643e1f75ee5b8f1f191906 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Mon, 6 Feb 2012 14:39:09 -0500 Subject: 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. --- crt/arm/crt1.s | 7 +++++-- crt/arm/crti.s | 7 +++++++ crt/arm/crtn.s | 9 +++++++++ 3 files changed, 21 insertions(+), 2 deletions(-) create mode 100644 crt/arm/crti.s create mode 100644 crt/arm/crtn.s (limited to 'crt/arm') diff --git a/crt/arm/crt1.s b/crt/arm/crt1.s index 74b90949..ed2a57a2 100644 --- a/crt/arm/crt1.s +++ b/crt/arm/crt1.s @@ -1,13 +1,16 @@ +.weak _init +.weak _fini .global _start _start: mov fp,#0 mov lr,#0 ldr a2,[sp],#4 mov a3,sp - mov a4,#0 + ldr a4,=_fini str fp,[sp,#-4]! str a1,[sp,#-4]! - str fp,[sp,#-4]! + str a4,[sp,#-4]! + ldr a4,=_init ldr a1,=main bl __libc_start_main 1: b 1b diff --git a/crt/arm/crti.s b/crt/arm/crti.s new file mode 100644 index 00000000..2eb23ed5 --- /dev/null +++ b/crt/arm/crti.s @@ -0,0 +1,7 @@ +.section .init +.global _init +_init: + +.section .fini +.global _fini +_fini: diff --git a/crt/arm/crtn.s b/crt/arm/crtn.s new file mode 100644 index 00000000..9d7107d0 --- /dev/null +++ b/crt/arm/crtn.s @@ -0,0 +1,9 @@ +.section .init + tst lr,#1 + moveq pc,lr + bx lr + +.section .fini + tst lr,#1 + moveq pc,lr + bx lr -- cgit v1.2.1