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zephyr/include/linker/cplusplus-rom.ld

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linker: cxx: Include .gcc_except_table sections Include .gcc_except_table (sub-)sections in linker files to support C++ with exceptions enabled. If these sections are not mapped warnings will be generated for orphaned sections at link time. Signed-off-by: Jan Van Winkel <jan.van_winkel@dxplore.eu>
2019-09-07 21:10:45 +08:00
/*
* Copyright (c) 2019 Jan Van Winkel <jan.van_winkel@dxplore.eu>
*
* SPDX-License-Identifier: Apache-2.0
*/
#if defined (CONFIG_CPLUSPLUS)
SECTION_PROLOGUE(.gcc_except_table,,ONLY_IF_RO)
{
*(.gcc_except_table .gcc_except_table.*)
linker-tool-gcc: revise for MMU support We need to do a few things differently if we are to support a virtual memory map, i.e. CONFIG_MMU where CONFIG_KERNEL_VM_BASE is not the same as CONFIG_SRAM_BASE_ADDRESS. - All sections must be specified with a VMA and LMA, where VMA is the virtual address and LMA is the physical memory location. - All sections must be specified with ALIGN_WITH_INPUT to keep VMAs and LMAs synchronized To do this, the existing linker macros need some adjustment: - GROUP_LINK_IN undefined when CONFIG_KERNEL_VM_BASE is not the same as CONFIG_SRAM_BASE_ADDRESS. - New macro GROUP_ROM_LINK_IN for text/rodata sections - New macro GROUP_NOLOAD_LINK_IN for bss/noinit sections - Implicit ALIGN_WITH_INPUT for all sections GROUP_FOLLOWS_AT is unused anywhere in the kernel for years now and has been removed. Signed-off-by: Andrew Boie <andrew.p.boie@intel.com> Signed-off-by: Daniel Leung <daniel.leung@intel.com>
2021-03-07 09:44:44 +08:00
} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
linker: cpp: Fix C++ exception handling info section linking The `.eh_frame_hdr` and `.eh_frame` ROM sections, which contain read- only C++ exception handling information, are currently specified in `cplusplus-ram.ld`, and this can cause the linker output location counter to take a ROM region address while in the RAM region. This commit relocates these sections to `cplusplus-rom.ld` in order to prevent the linker output location counter from getting corrupted. For more details, refer to the issue #35972. Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
2021-06-06 01:12:14 +08:00
#if defined (CONFIG_EXCEPTIONS)
SECTION_PROLOGUE(.eh_frame_hdr,,)
{
*(.eh_frame_hdr)
} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
SECTION_PROLOGUE(.eh_frame,,)
{
KEEP (*(SORT_NONE(EXCLUDE_FILE (*crtend.o) .eh_frame)))
KEEP (*(SORT_NONE(.eh_frame)))
} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
#endif /* CONFIG_EXCEPTIONS */
#endif /* CONFIG_CPLUSPLUS */