libucontext

Author	SHA1	Message	Date
Sören Tempel	d0b03541bf	common-trampoline: Ensure omission of frame-pointer Some architecture-specific implementations of the FETCH_LINKPTR (e.g. the one for x86) attempt to find the linkptr relative to the stack pointer. Therefore, they make assumption about the value of the SP at the point where the FETCH_LINKPTR code is executed. This means that we don't want the C compiler to mess with our SP. For this purpose, local variables in this function are currently declared using the register storage specifier. Additionally, we need to make sure that a frame pointer is /always/ omitted for this function. On x86 Alpine, the frame pointer is presently not omitted with GCC 13 when using -Os, therefore the tests segfault with -Os on Alpine presently. Fixes #52	2024-08-07 17:46:50 -07:00
Ariadne Conill	a51dce6e2c	common-trampoline: initialize link pointer to NULL	2022-02-13 07:35:23 +00:00
Daniel Kolesa	4801f0bdd8	all: mark the trampoline symbol hidden this should not be a part of the public ABI	2021-01-08 15:17:13 +01:00
Ariadne Conill	e45956896a	common-trampoline: use register keyword to force register allocation	2021-01-08 03:00:37 -07:00
osy	e1e6508af2	defs: use register output only for FETCH_LINKPTR	2021-01-08 02:59:43 -07:00
Ariadne Conill	2d51d7bfa4	x86_64: add common trampoline code written in C, port to it	2020-12-11 23:04:47 -07:00