mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2024-12-04 06:50:06 +08:00
Code Issues Packages Projects Releases Wiki Activity

target: Support heap-based trampolines

Browse Source 
Enable -ftrampoline-impl=heap by default if we are on macOS 11
or later.

Co-Authored-By: Maxim Blinov <maxim.blinov@embecosm.com>
Co-Authored-By: Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
Co-Authored-By: Iain Sandoe <iain@sandoe.co.uk>

gcc/ChangeLog:

	* config.gcc: Default to heap trampolines on macOS 11 and above.
	* config/i386/darwin.h: Define X86_CUSTOM_FUNCTION_TEST.
	* config/i386/i386.h: Define X86_CUSTOM_FUNCTION_TEST.
	* config/i386/i386.cc: Use X86_CUSTOM_FUNCTION_TEST.
This commit is contained in:
Andrew Burgess 2023-08-05 14:56:31 +02:00 committed by Iain Sandoe
parent 28d8c680aa
commit cbf6da166e
4 changed files with 24 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
gcc/config.gcc
View File

@ -1171,6 +1171,17 @@ case ${target} in
;;
esac
# Figure out if we need to enable heap trampolines by default
case ${target} in
*-*-darwin2*)
# Currently, we do this for macOS 11 and above.
tm_defines="$tm_defines HEAP_TRAMPOLINES_INIT=1"
;;
*)
tm_defines="$tm_defines HEAP_TRAMPOLINES_INIT=0"
;;
esac
case ${target} in
aarch64*-*-elf | aarch64*-*-fuchsia* | aarch64*-*-rtems*)
tm_file="${tm_file} elfos.h newlib-stdint.h"

6
gcc/config/i386/darwin.h
View File

@ -308,3 +308,9 @@ along with GCC; see the file COPYING3. If not see
#define CLEAR_INSN_CACHE(beg, end) \
extern void sys_icache_invalidate(void *start, size_t len); \
sys_icache_invalidate ((beg), (size_t)((end)-(beg)))
/* Disable custom function descriptors for Darwin when we have off-stack
trampolines. */
#undef X86_CUSTOM_FUNCTION_TEST
#define X86_CUSTOM_FUNCTION_TEST \
(flag_trampolines && flag_trampoline_impl == TRAMPOLINE_IMPL_HEAP) ? 0 : 1

2
gcc/config/i386/i386.cc
View File

@ -26287,7 +26287,7 @@ ix86_libgcc_floating_mode_supported_p
#define TARGET_HARD_REGNO_SCRATCH_OK ix86_hard_regno_scratch_ok
#undef TARGET_CUSTOM_FUNCTION_DESCRIPTORS
#define TARGET_CUSTOM_FUNCTION_DESCRIPTORS 1
#define TARGET_CUSTOM_FUNCTION_DESCRIPTORS X86_CUSTOM_FUNCTION_TEST
#undef TARGET_ADDR_SPACE_ZERO_ADDRESS_VALID
#define TARGET_ADDR_SPACE_ZERO_ADDRESS_VALID ix86_addr_space_zero_address_valid

6
gcc/config/i386/i386.h
View File

@ -760,6 +760,12 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
/* Minimum allocation boundary for the code of a function. */
#define FUNCTION_BOUNDARY 8
/* We will and with this value to test if a custom function descriptor needs
a static chain. The function boundary must the adjusted so that the bit
this represents is no longer part of the address. 0 Disables the custom
function descriptors. */
#define X86_CUSTOM_FUNCTION_TEST 1
/* C++ stores the virtual bit in the lowest bit of function pointers. */
#define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_pfn