rtl-mdreloc-mips.c File Reference

#include <sys/cdefs.h>
#include <errno.h>
#include <inttypes.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <rtems/rtl/rtl.h>
#include "rtl-elf.h"
#include "rtl-error.h"
#include <rtems/rtl/rtl-trace.h>
#include "rtl-unwind.h"
#include "rtl-unwind-dw2.h"

Macros
#define	RTEMS_RTL_MIPS_HI16_MAX   (128)

Functions
uint32_t	rtems_rtl_elf_section_flags (const rtems_rtl_obj *obj, const Elf_Shdr *shdr)
uint32_t	rtems_rtl_elf_arch_parse_section (const rtems_rtl_obj *obj, int section, const char *name, const Elf_Shdr *shdr, const uint32_t flags)
bool	rtems_rtl_elf_arch_section_alloc (const rtems_rtl_obj *obj, rtems_rtl_obj_sect *sect)
bool	rtems_rtl_elf_arch_section_free (const rtems_rtl_obj *obj, rtems_rtl_obj_sect *sect)
bool	rtems_rtl_elf_rel_resolve_sym (Elf_Word type)
uint32_t	rtems_rtl_obj_tramp_alignment (const rtems_rtl_obj *obj)
size_t	rtems_rtl_elf_relocate_tramp_max_size (void)
rtems_rtl_elf_rel_status	rtems_rtl_elf_relocate_rela_tramp (rtems_rtl_obj *obj, const Elf_Rela *rela, const rtems_rtl_obj_sect *sect, const char *symname, const Elf_Byte syminfo, const Elf_Word symvalue)
rtems_rtl_elf_rel_status	rtems_rtl_elf_relocate_rela (rtems_rtl_obj *obj, const Elf_Rela *rela, const rtems_rtl_obj_sect *sect, const char *symname, const Elf_Byte syminfo, const Elf_Word symvalue)
rtems_rtl_elf_rel_status	rtems_rtl_elf_relocate_rel_tramp (rtems_rtl_obj *obj, const Elf_Rel *rel, const rtems_rtl_obj_sect *sect, const char *symname, const Elf_Byte syminfo, const Elf_Word symvalue)
rtems_rtl_elf_rel_status	rtems_rtl_elf_relocate_rel (rtems_rtl_obj *obj, const Elf_Rel *rel, const rtems_rtl_obj_sect *sect, const char *symname, const Elf_Byte syminfo, const Elf_Word symvalue)
bool	rtems_rtl_elf_unwind_parse (const rtems_rtl_obj *obj, const char *name, uint32_t flags)
bool	rtems_rtl_elf_unwind_register (rtems_rtl_obj *obj)
bool	rtems_rtl_elf_unwind_deregister (rtems_rtl_obj *obj)

Function Documentation

rtems_rtl_elf_arch_parse_section()

uint32_t rtems_rtl_elf_arch_parse_section	(	const rtems_rtl_obj *	obj,
		int	section,
		const char *	name,
		const Elf_Shdr *	shdr,
		const uint32_t	flags
	)

Architecture specific handler to parse the section and add any flags that may be need to handle the section.

Parameters

obj	The object file being relocated.
seciton	The section index.
name	The name of the section
shdr	The ELF section header.
flags	The standard ELF parsed flags.

Return values

uint32_t

Extra RTL object file flags.

rtems_rtl_elf_arch_section_alloc()

bool rtems_rtl_elf_arch_section_alloc	(	const rtems_rtl_obj *	obj,
		rtems_rtl_obj_sect *	sect
	)

Architecture specific handler to allocate a section. Some sections are specific to an architecture and need special allocators.

Parameters

obj	The object file being relocated.
sect	The section data.

Return values

true	The allocator was successful.

rtems_rtl_elf_arch_section_free()

bool rtems_rtl_elf_arch_section_free	(	const rtems_rtl_obj *	obj,
		rtems_rtl_obj_sect *	sect
	)

Architecture specific handler to free a section. Some sections are specific to an architecture and need special allocators.

Parameters

obj	The object file being relocated.
sect	The section data.

Return values

true	The allocator was successful.

rtems_rtl_elf_rel_resolve_sym()

bool rtems_rtl_elf_rel_resolve_sym

(

Elf_Word

type

)

Architecture specific handler to check is a relocation record's type is required to resolve a symbol.

Parameters

type	The type field in the relocation record.

Return values

true	The relocation record require symbol resolution.
false	The relocation record does not require symbol resolution.

rtems_rtl_elf_relocate_rel()

rtems_rtl_elf_rel_status rtems_rtl_elf_relocate_rel	(	rtems_rtl_obj *	obj,
		const Elf_Rel *	rel,
		const rtems_rtl_obj_sect *	sect,
		const char *	symname,
		const Elf_Byte	syminfo,
		const Elf_Word	symvalue
	)

Architecture specific relocation handler compiled in for a specific architecture by the build system. The handler applies the relocation to the target.

Parameters

obj	The object file being relocated.
rel	The ELF relocation record.
sect	The section of the object file the relocation is for.
symname	The symbol's name.
syminfo	The ELF symbol info field.
symvalue	If a symbol is referenced, this is the symbols value.

Return values

rtems_rtl_elf_rel_status

The result of the trampoline parsing.

rtems_rtl_elf_relocate_rel_tramp()

rtems_rtl_elf_rel_status rtems_rtl_elf_relocate_rel_tramp	(	rtems_rtl_obj *	obj,
		const Elf_Rel *	rel,
		const rtems_rtl_obj_sect *	sect,
		const char *	symname,
		const Elf_Byte	syminfo,
		const Elf_Word	symvalue
	)

Architecture specific relocation trampoline handler compiled in for a specific architecture by the build system. The handler determines if the relocation record requires a trampoline.

Parameters

obj	The object file being relocated.
rela	The ELF relocation record.
sect	The section of the object file the relocation is for.
symname	The symbol's name.
syminfo	The ELF symbol info field.
symvalue	If a symbol is referenced, this is the symbols value.

Return values

rtems_rtl_elf_rel_status

The result of the trampoline parsing.

rtems_rtl_elf_relocate_rela()

rtems_rtl_elf_rel_status rtems_rtl_elf_relocate_rela	(	rtems_rtl_obj *	obj,
		const Elf_Rela *	rela,
		const rtems_rtl_obj_sect *	sect,
		const char *	symname,
		const Elf_Byte	syminfo,
		const Elf_Word	symvalue
	)

Architecture specific relocation handler compiled in for a specific architecture by the build system. The handler applies the relocation to the target.

Parameters

obj	The object file being relocated.
rela	The ELF addend relocation record.
sect	The section of the object file the relocation is for.
symname	The symbol's name.
syminfo	The ELF symbol info field.
symvalue	If a symbol is referenced, this is the symbols value.

Return values

rtems_rtl_elf_rel_status

The result of the trampoline parsing.

rtems_rtl_elf_relocate_rela_tramp()

rtems_rtl_elf_rel_status rtems_rtl_elf_relocate_rela_tramp	(	rtems_rtl_obj *	obj,
		const Elf_Rela *	rela,
		const rtems_rtl_obj_sect *	sect,
		const char *	symname,
		const Elf_Byte	syminfo,
		const Elf_Word	symvalue
	)

Architecture specific relocation handler compiled in for a specific architecture by the build system. The handler applies the relocation to the target.

Parameters

obj	The object file being relocated.
rela	The ELF addend relocation record.
sect	The section of the object file the relocation is for.
symname	The symbol's name.
syminfo	The ELF symbol info field.
symvalue	If a symbol is referenced, this is the symbols value.

Return values

rtems_rtl_elf_rel_status

The result of the trampoline parsing.

rtems_rtl_elf_relocate_tramp_max_size()

size_t rtems_rtl_elf_relocate_tramp_max_size

(

void

)

Architecture specific relocation maximum trampoline size. A trampoline entry of this size is allocated for each unresolved external.

Returns

size_t The maximum size of a trampoline for this architecture.

rtems_rtl_elf_section_flags()

uint32_t rtems_rtl_elf_section_flags	(	const rtems_rtl_obj *	obj,
		const Elf_Shdr *	shdr
	)

Architecture specific handler to translate unknown section flags to RTL section flags. If this function returns 0 an error is raised.

Parameters

obj	The object file being relocated.
shdr	The ELF section header.

Return values

0	Unknown or unsupported flags.
uint32_t	RTL object file flags.

rtems_rtl_elf_unwind_deregister()

bool rtems_rtl_elf_unwind_deregister

(

rtems_rtl_obj *

obj

)

Architecture specific handler to remove an object file's unwind information from the base image.

Parameters

obj	The object file.

Return values

true	The unwind information has been deregistered.
false	The unwind information could not be deregistered.

rtems_rtl_elf_unwind_parse()

bool rtems_rtl_elf_unwind_parse	(	const rtems_rtl_obj *	obj,
		const char *	name,
		uint32_t	flags
	)

Architecture specific handler to check if a section contains exception handler data..

Parameters

obj	The object file.
name	The section's name.
uint32	flags The object file's flags.

Return values

true	The section contains unwind information.
false	The section does not contain unwind information.

rtems_rtl_elf_unwind_register()

bool rtems_rtl_elf_unwind_register

(

rtems_rtl_obj *

obj

)

Architecture specific handler to add an object file's unwind information to the base image.

Parameters

obj	The object file.

Return values

true	The unwind information has been registered.
false	The unwind information could not be registered.

rtems_rtl_obj_tramp_alignment()

uint32_t rtems_rtl_obj_tramp_alignment

(

const rtems_rtl_obj *

obj

)

The trampolinme alignment for the architecture.

This is implemented and set in the architecture backend.

Parameters

obj	The object file's descriptor.

Returns

uint32_t The alignment. Can be 0 or 1 for not aligned or the alignment.