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20 Commits (570c0c8b322b2777ad917feb9164b5737c250714)

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
osy f3e1b876c7 project: move freestanding include headers 
This is needed because in libucontext.h we include "libucontext/bits.h".
We therefore need to have bits.h in somepath/libucontext/bits.h. In the
Makefile, somepath/freestanding/bits.h was copied to the right path but
in the meson build system, the include copy happens at the end.
 2021-03-08 13:02:27 -08:00
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
osy d31c95a11a build: remove -DLIBUCONTEXT_ASSEMBLY 
Meson does not support separate defines for .S compile.
 2021-01-08 03:11:25 -07:00
osy 163c11d989 build: support mach-o ABI 2021-01-08 03:05:06 -07:00
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
Ariadne Conill 40c8016144 bits: alias greg_t as libucontext_greg_t in non-freestanding builds 2020-12-06 03:40:55 -06:00
Ariadne Conill 0953d71ed1 build: fill in more details for freestanding builds 2020-12-06 03:31:48 -06:00
Ariadne Conill 2979186379 common: define libucontext_ucontext_t for non-freestanding case 2020-12-06 03:18:41 -06:00
Ariadne Conill fe19127c66 build: add support for EXPORT_UNPREFIXED=no 
In an EXPORT_UNPREFIXED=no build, getcontext/makecontext/setcontext/swapcontext
symbols are not provided.
 2020-12-06 02:54:01 -06:00
Khem Raj b6732f6884 Remove using .end directive with clang 
Clang does not support this asm directive
Fixes Issue #19

Signed-off-by: Khem Raj <raj.khem@gmail.com>
 2020-04-10 11:23:39 -07:00
Ariadne Conill f708c95659 arm: modernize 2020-03-30 05:04:18 +00:00
Ariadne Conill d8cfe83e34 common: use REG_SZ, not SZ_REG in line with mips64 port for REG_OFFSET macro 2020-03-29 14:50:38 +00:00
Ariadne Conill 2411cdfb54 common: add REG_OFFSET accesso 2020-03-29 14:27:19 +00:00
Ariadne Conill c385d69aa9 common: add ALIAS() macro 2020-03-29 14:12:23 +00:00
Ariadne Conill fd32a2fa8c common: factor out .ent handling 2020-03-29 14:03:18 +00:00
Ariadne Conill 2f4eb16f38 mips64: factor out frame management macros into arch/common/common-defs.h 2020-03-29 13:49:57 +00:00