WebSVN – HelenOS – Diff – /trunk/kernel/generic/src/lib/elf.c


/*
 * Copyright (c) 2006 Sergey Bondari
 * Copyright (c) 2006 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup generic
 * @{
 */
 
/**
 * @file
 * @brief   Kernel ELF loader.
 */
 
#include <lib/elf.h>
#include <debug.h>
#include <arch/types.h>
#include <mm/as.h>
#include <mm/frame.h>
#include <mm/slab.h>
#include <align.h>
#include <memstr.h>
#include <macros.h>
#include <arch.h>
 
static char *error_codes[] = {
    "no error",
    "invalid image",
    "address space error",
    "incompatible image",
    "unsupported image type",
    "irrecoverable error"
};
 
static int segment_header(elf_segment_header_t *entry, elf_header_t *elf,
    as_t *as);
static int section_header(elf_section_header_t *entry, elf_header_t *elf,
    as_t *as);
static int load_segment(elf_segment_header_t *entry, elf_header_t *elf,
    as_t *as);
 
/** ELF loader
 *
 * @param header Pointer to ELF header in memory
 * @param as Created and properly mapped address space
 * @return EE_OK on success
 */
unsigned int elf_load(elf_header_t *header, as_t * as)
{
    int i, rc;
 
    /* Identify ELF */
    if (header->e_ident[EI_MAG0] != ELFMAG0 ||
        header->e_ident[EI_MAG1] != ELFMAG1 ||
        header->e_ident[EI_MAG2] != ELFMAG2 ||
        header->e_ident[EI_MAG3] != ELFMAG3) {
        return EE_INVALID;
    }
   
    /* Identify ELF compatibility */
    if (header->e_ident[EI_DATA] != ELF_DATA_ENCODING ||
        header->e_machine != ELF_MACHINE ||
        header->e_ident[EI_VERSION] != EV_CURRENT ||
        header->e_version != EV_CURRENT ||
        header->e_ident[EI_CLASS] != ELF_CLASS) {
        return EE_INCOMPATIBLE;
    }
 
    if (header->e_phentsize != sizeof(elf_segment_header_t))
        return EE_INCOMPATIBLE;
 
    if (header->e_shentsize != sizeof(elf_section_header_t))
        return EE_INCOMPATIBLE;
 
    /* Check if the object type is supported. */
    if (header->e_type != ET_EXEC)
        return EE_UNSUPPORTED;
 
    /* Check if the ELF image starts on a page boundary */
    if (ALIGN_UP((uintptr_t)header, PAGE_SIZE) != (uintptr_t)header)
        return EE_UNSUPPORTED;
 
    /* Walk through all segment headers and process them. */
    for (i = 0; i < header->e_phnum; i++) {
        elf_segment_header_t *seghdr;
 
        seghdr = &((elf_segment_header_t *)(((uint8_t *) header) +
            header->e_phoff))[i];
        rc = segment_header(seghdr, header, as);
        if (rc != EE_OK)
            return rc;
    }
 
    /* Inspect all section headers and proccess them. */
    for (i = 0; i < header->e_shnum; i++) {
        elf_section_header_t *sechdr;
 
        sechdr = &((elf_section_header_t *)(((uint8_t *) header) +
            header->e_shoff))[i];
        rc = section_header(sechdr, header, as);
        if (rc != EE_OK)
            return rc;
    }
 
    return EE_OK;
}
 
/** Print error message according to error code.
 *
 * @param rc Return code returned by elf_load().
 *
 * @return NULL terminated description of error.
 */
char *elf_error(unsigned int rc)
{
    ASSERT(rc < sizeof(error_codes) / sizeof(char *));
 
    return error_codes[rc];
}
 
/** Process segment header.
 *
 * @param entry Segment header.
 * @param elf ELF header.
 * @param as Address space into wich the ELF is being loaded.
 *
 * @return EE_OK on success, error code otherwise.
 */
static int segment_header(elf_segment_header_t *entry, elf_header_t *elf,
    as_t *as)
{
    switch (entry->p_type) {
    case PT_NULL:
    case PT_PHDR:
        break;
    case PT_LOAD:
        return load_segment(entry, elf, as);
        break;
    case PT_DYNAMIC:
    case PT_INTERP:
    case PT_SHLIB:
    case PT_NOTE:
    case PT_LOPROC:
    case PT_HIPROC:
    default:
        return EE_UNSUPPORTED;
        break;
    }
    return EE_OK;
}
 
/** Load segment described by program header entry.
 *
 * @param entry Program header entry describing segment to be loaded.
 * @param elf ELF header.
 * @param as Address space into wich the ELF is being loaded.
 *
 * @return EE_OK on success, error code otherwise.
 */
int load_segment(elf_segment_header_t *entry, elf_header_t *elf, as_t *as)
{
    as_area_t *a;
    int flags = 0;
    mem_backend_data_t backend_data;
    uintptr_t base;
    size_t mem_sz;
   
    backend_data.elf = elf;
    backend_data.segment = entry;
 
    if (entry->p_align > 1) {
        if ((entry->p_offset % entry->p_align) !=
            (entry->p_vaddr % entry->p_align)) {
            return EE_INVALID;
        }
    }
 
    if (entry->p_flags & PF_X)
        flags |= AS_AREA_EXEC;
    if (entry->p_flags & PF_W)
        flags |= AS_AREA_WRITE;
    if (entry->p_flags & PF_R)
        flags |= AS_AREA_READ;
    flags |= AS_AREA_CACHEABLE;
 
    /*
     * Align vaddr down, inserting a little "gap" at the beginning.
     * Adjust area size, so that its end remains in place.
     */
    base = ALIGN_DOWN(entry->p_vaddr, PAGE_SIZE);
    mem_sz = entry->p_memsz + (entry->p_vaddr - base);
 
    a = as_area_create(as, flags, mem_sz, base,
        AS_AREA_ATTR_NONE, &elf_backend, &backend_data);
    if (!a)
        return EE_MEMORY;
   
    /*
     * The segment will be mapped on demand by elf_page_fault().
     */
 
    return EE_OK;
}
 
/** Process section header.
 *
 * @param entry Segment header.
 * @param elf ELF header.
 * @param as Address space into wich the ELF is being loaded.
 *
 * @return EE_OK on success, error code otherwise.
 */
static int section_header(elf_section_header_t *entry, elf_header_t *elf,
    as_t *as)
{
    switch (entry->sh_type) {
    case SHT_PROGBITS:
        if (entry->sh_flags & SHF_TLS) {
            /* .tdata */
        }
        break;
    case SHT_NOBITS:
        if (entry->sh_flags & SHF_TLS) {
            /* .tbss */
        }
        break;
    default:
        break;
    }
   
    return EE_OK;
}
 
/** @}
 */
 

Rev 2745	Rev 3007
1	/*	1	/*
2	* Copyright (c) 2006 Sergey Bondari	2	* Copyright (c) 2006 Sergey Bondari
3	* Copyright (c) 2006 Jakub Jermar	3	* Copyright (c) 2006 Jakub Jermar
4	* All rights reserved.	4	* All rights reserved.
5	*	5	*
6	* Redistribution and use in source and binary forms, with or without	6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions	7	* modification, are permitted provided that the following conditions
8	* are met:	8	* are met:
9	*	9	*
10	* - Redistributions of source code must retain the above copyright	10	* - Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.	11	* notice, this list of conditions and the following disclaimer.
12	* - Redistributions in binary form must reproduce the above copyright	12	* - Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the	13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.	14	* documentation and/or other materials provided with the distribution.
15	* - The name of the author may not be used to endorse or promote products	15	* - The name of the author may not be used to endorse or promote products
16	* derived from this software without specific prior written permission.	16	* derived from this software without specific prior written permission.
17	*	17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	28	*/
29		29
30	/** @addtogroup generic	30	/** @addtogroup generic
31	* @{	31	* @{
32	*/	32	*/
33		33
34	/**	34	/**
35	* @file	35	* @file
36	* @brief Kernel ELF loader.	36	* @brief Kernel ELF loader.
37	*/	37	*/
38		38
39	#include <lib/elf.h>	39	#include <lib/elf.h>
40	#include <debug.h>	40	#include <debug.h>
41	#include <arch/types.h>	41	#include <arch/types.h>
42	#include <mm/as.h>	42	#include <mm/as.h>
43	#include <mm/frame.h>	43	#include <mm/frame.h>
44	#include <mm/slab.h>	44	#include <mm/slab.h>
45	#include <align.h>	45	#include <align.h>
46	#include <memstr.h>	46	#include <memstr.h>
47	#include <macros.h>	47	#include <macros.h>
48	#include <arch.h>	48	#include <arch.h>
49		49
50	static char *error_codes[] = {	50	static char *error_codes[] = {
51	"no error",	51	"no error",
52	"invalid image",	52	"invalid image",
53	"address space error",	53	"address space error",
54	"incompatible image",	54	"incompatible image",
55	"unsupported image type",	55	"unsupported image type",
56	"irrecoverable error"	56	"irrecoverable error"
57	};	57	};
58		58
59	static int segment_header(elf_segment_header_t entry, elf_header_t elf,	59	static int segment_header(elf_segment_header_t entry, elf_header_t elf,
60	as_t *as);	60	as_t *as);
61	static int section_header(elf_section_header_t entry, elf_header_t elf,	61	static int section_header(elf_section_header_t entry, elf_header_t elf,
62	as_t *as);	62	as_t *as);
63	static int load_segment(elf_segment_header_t entry, elf_header_t elf,	63	static int load_segment(elf_segment_header_t entry, elf_header_t elf,
64	as_t *as);	64	as_t *as);
65		65
66	/** ELF loader	66	/** ELF loader
67	*	67	*
68	* @param header Pointer to ELF header in memory	68	* @param header Pointer to ELF header in memory
69	* @param as Created and properly mapped address space	69	* @param as Created and properly mapped address space
70	* @return EE_OK on success	70	* @return EE_OK on success
71	*/	71	*/
72	unsigned int elf_load(elf_header_t header, as_t as)	72	unsigned int elf_load(elf_header_t header, as_t as)
73	{	73	{
74	int i, rc;	74	int i, rc;
75		75
76	/* Identify ELF */	76	/* Identify ELF */
77	if (header->e_ident[EI_MAG0] != ELFMAG0 \|\|	77	if (header->e_ident[EI_MAG0] != ELFMAG0 \|\|
78	header->e_ident[EI_MAG1] != ELFMAG1 \|\|	78	header->e_ident[EI_MAG1] != ELFMAG1 \|\|
79	header->e_ident[EI_MAG2] != ELFMAG2 \|\|	79	header->e_ident[EI_MAG2] != ELFMAG2 \|\|
80	header->e_ident[EI_MAG3] != ELFMAG3) {	80	header->e_ident[EI_MAG3] != ELFMAG3) {
81	return EE_INVALID;	81	return EE_INVALID;
82	}	82	}
83		83
84	/* Identify ELF compatibility */	84	/* Identify ELF compatibility */
85	if (header->e_ident[EI_DATA] != ELF_DATA_ENCODING \|\|	85	if (header->e_ident[EI_DATA] != ELF_DATA_ENCODING \|\|
86	header->e_machine != ELF_MACHINE \|\|	86	header->e_machine != ELF_MACHINE \|\|
87	header->e_ident[EI_VERSION] != EV_CURRENT \|\|	87	header->e_ident[EI_VERSION] != EV_CURRENT \|\|
88	header->e_version != EV_CURRENT \|\|	88	header->e_version != EV_CURRENT \|\|
89	header->e_ident[EI_CLASS] != ELF_CLASS) {	89	header->e_ident[EI_CLASS] != ELF_CLASS) {
90	return EE_INCOMPATIBLE;	90	return EE_INCOMPATIBLE;
91	}	91	}
92		92
93	if (header->e_phentsize != sizeof(elf_segment_header_t))	93	if (header->e_phentsize != sizeof(elf_segment_header_t))
94	return EE_INCOMPATIBLE;	94	return EE_INCOMPATIBLE;
95		95
96	if (header->e_shentsize != sizeof(elf_section_header_t))	96	if (header->e_shentsize != sizeof(elf_section_header_t))
97	return EE_INCOMPATIBLE;	97	return EE_INCOMPATIBLE;
98		98
99	/* Check if the object type is supported. */	99	/* Check if the object type is supported. */
100	if (header->e_type != ET_EXEC)	100	if (header->e_type != ET_EXEC)
101	return EE_UNSUPPORTED;	101	return EE_UNSUPPORTED;
102		102
-		103	/* Check if the ELF image starts on a page boundary */
-		104	if (ALIGN_UP((uintptr_t)header, PAGE_SIZE) != (uintptr_t)header)
-		105	return EE_UNSUPPORTED;
-		106
103	/* Walk through all segment headers and process them. */	107	/* Walk through all segment headers and process them. */
104	for (i = 0; i < header->e_phnum; i++) {	108	for (i = 0; i < header->e_phnum; i++) {
105	elf_segment_header_t *seghdr;	109	elf_segment_header_t *seghdr;
106		110
107	seghdr = &((elf_segment_header_t )(((uint8_t ) header) +	111	seghdr = &((elf_segment_header_t )(((uint8_t ) header) +
108	header->e_phoff))[i];	112	header->e_phoff))[i];
109	rc = segment_header(seghdr, header, as);	113	rc = segment_header(seghdr, header, as);
110	if (rc != EE_OK)	114	if (rc != EE_OK)
111	return rc;	115	return rc;
112	}	116	}
113		117
114	/* Inspect all section headers and proccess them. */	118	/* Inspect all section headers and proccess them. */
115	for (i = 0; i < header->e_shnum; i++) {	119	for (i = 0; i < header->e_shnum; i++) {
116	elf_section_header_t *sechdr;	120	elf_section_header_t *sechdr;
117		121
118	sechdr = &((elf_section_header_t )(((uint8_t ) header) +	122	sechdr = &((elf_section_header_t )(((uint8_t ) header) +
119	header->e_shoff))[i];	123	header->e_shoff))[i];
120	rc = section_header(sechdr, header, as);	124	rc = section_header(sechdr, header, as);
121	if (rc != EE_OK)	125	if (rc != EE_OK)
122	return rc;	126	return rc;
123	}	127	}
124		128
125	return EE_OK;	129	return EE_OK;
126	}	130	}
127		131
128	/** Print error message according to error code.	132	/** Print error message according to error code.
129	*	133	*
130	* @param rc Return code returned by elf_load().	134	* @param rc Return code returned by elf_load().
131	*	135	*
132	* @return NULL terminated description of error.	136	* @return NULL terminated description of error.
133	*/	137	*/
134	char *elf_error(unsigned int rc)	138	char *elf_error(unsigned int rc)
135	{	139	{
136	ASSERT(rc < sizeof(error_codes) / sizeof(char *));	140	ASSERT(rc < sizeof(error_codes) / sizeof(char *));
137		141
138	return error_codes[rc];	142	return error_codes[rc];
139	}	143	}
140		144
141	/** Process segment header.	145	/** Process segment header.
142	*	146	*
143	* @param entry Segment header.	147	* @param entry Segment header.
144	* @param elf ELF header.	148	* @param elf ELF header.
145	* @param as Address space into wich the ELF is being loaded.	149	* @param as Address space into wich the ELF is being loaded.
146	*	150	*
147	* @return EE_OK on success, error code otherwise.	151	* @return EE_OK on success, error code otherwise.
148	*/	152	*/
149	static int segment_header(elf_segment_header_t entry, elf_header_t elf,	153	static int segment_header(elf_segment_header_t entry, elf_header_t elf,
150	as_t *as)	154	as_t *as)
151	{	155	{
152	switch (entry->p_type) {	156	switch (entry->p_type) {
153	case PT_NULL:	157	case PT_NULL:
154	case PT_PHDR:	158	case PT_PHDR:
155	break;	159	break;
156	case PT_LOAD:	160	case PT_LOAD:
157	return load_segment(entry, elf, as);	161	return load_segment(entry, elf, as);
158	break;	162	break;
159	case PT_DYNAMIC:	163	case PT_DYNAMIC:
160	case PT_INTERP:	164	case PT_INTERP:
161	case PT_SHLIB:	165	case PT_SHLIB:
162	case PT_NOTE:	166	case PT_NOTE:
163	case PT_LOPROC:	167	case PT_LOPROC:
164	case PT_HIPROC:	168	case PT_HIPROC:
165	default:	169	default:
166	return EE_UNSUPPORTED;	170	return EE_UNSUPPORTED;
167	break;	171	break;
168	}	172	}
169	return EE_OK;	173	return EE_OK;
170	}	174	}
171		175
172	/** Load segment described by program header entry.	176	/** Load segment described by program header entry.
173	*	177	*
174	* @param entry Program header entry describing segment to be loaded.	178	* @param entry Program header entry describing segment to be loaded.
175	* @param elf ELF header.	179	* @param elf ELF header.
176	* @param as Address space into wich the ELF is being loaded.	180	* @param as Address space into wich the ELF is being loaded.
177	*	181	*
178	* @return EE_OK on success, error code otherwise.	182	* @return EE_OK on success, error code otherwise.
179	*/	183	*/
180	int load_segment(elf_segment_header_t entry, elf_header_t elf, as_t *as)	184	int load_segment(elf_segment_header_t entry, elf_header_t elf, as_t *as)
181	{	185	{
182	as_area_t *a;	186	as_area_t *a;
183	int flags = 0;	187	int flags = 0;
184	mem_backend_data_t backend_data;	188	mem_backend_data_t backend_data;
-		189	uintptr_t base;
-		190	size_t mem_sz;
185		191
186	backend_data.elf = elf;	192	backend_data.elf = elf;
187	backend_data.segment = entry;	193	backend_data.segment = entry;
188		194
189	if (entry->p_align > 1) {	195	if (entry->p_align > 1) {
190	if ((entry->p_offset % entry->p_align) !=	196	if ((entry->p_offset % entry->p_align) !=
191	(entry->p_vaddr % entry->p_align)) {	197	(entry->p_vaddr % entry->p_align)) {
192	return EE_INVALID;	198	return EE_INVALID;
193	}	199	}
194	}	200	}
195		201
196	if (entry->p_flags & PF_X)	202	if (entry->p_flags & PF_X)
197	flags \|= AS_AREA_EXEC;	203	flags \|= AS_AREA_EXEC;
198	if (entry->p_flags & PF_W)	204	if (entry->p_flags & PF_W)
199	flags \|= AS_AREA_WRITE;	205	flags \|= AS_AREA_WRITE;
200	if (entry->p_flags & PF_R)	206	if (entry->p_flags & PF_R)
201	flags \|= AS_AREA_READ;	207	flags \|= AS_AREA_READ;
202	flags \|= AS_AREA_CACHEABLE;	208	flags \|= AS_AREA_CACHEABLE;
203		209
204	/*	210	/*
-		211	* Align vaddr down, inserting a little "gap" at the beginning.
205	* Check if the virtual address starts on page boundary.	212	* Adjust area size, so that its end remains in place.
206	*/	213	*/
207	if (ALIGN_UP(entry->p_vaddr, PAGE_SIZE) != entry->p_vaddr)	214	base = ALIGN_DOWN(entry->p_vaddr, PAGE_SIZE);
208	return EE_UNSUPPORTED;	215	mem_sz = entry->p_memsz + (entry->p_vaddr - base);
209		216
210	a = as_area_create(as, flags, entry->p_memsz, entry->p_vaddr,	217	a = as_area_create(as, flags, mem_sz, base,
211	AS_AREA_ATTR_NONE, &elf_backend, &backend_data);	218	AS_AREA_ATTR_NONE, &elf_backend, &backend_data);
212	if (!a)	219	if (!a)
213	return EE_MEMORY;	220	return EE_MEMORY;
214		221
215	/*	222	/*
216	* The segment will be mapped on demand by elf_page_fault().	223	* The segment will be mapped on demand by elf_page_fault().
217	*/	224	*/
218		225
219	return EE_OK;	226	return EE_OK;
220	}	227	}
221		228
222	/** Process section header.	229	/** Process section header.
223	*	230	*
224	* @param entry Segment header.	231	* @param entry Segment header.
225	* @param elf ELF header.	232	* @param elf ELF header.
226	* @param as Address space into wich the ELF is being loaded.	233	* @param as Address space into wich the ELF is being loaded.
227	*	234	*
228	* @return EE_OK on success, error code otherwise.	235	* @return EE_OK on success, error code otherwise.
229	*/	236	*/
230	static int section_header(elf_section_header_t entry, elf_header_t elf,	237	static int section_header(elf_section_header_t entry, elf_header_t elf,
231	as_t *as)	238	as_t *as)
232	{	239	{
233	switch (entry->sh_type) {	240	switch (entry->sh_type) {
234	case SHT_PROGBITS:	241	case SHT_PROGBITS:
235	if (entry->sh_flags & SHF_TLS) {	242	if (entry->sh_flags & SHF_TLS) {
236	/* .tdata */	243	/* .tdata */
237	}	244	}
238	break;	245	break;
239	case SHT_NOBITS:	246	case SHT_NOBITS:
240	if (entry->sh_flags & SHF_TLS) {	247	if (entry->sh_flags & SHF_TLS) {
241	/* .tbss */	248	/* .tbss */
242	}	249	}
243	break;	250	break;
244	default:	251	default:
245	break;	252	break;
246	}	253	}
247		254
248	return EE_OK;	255	return EE_OK;
249	}	256	}
250		257
251	/** @}	258	/** @}
252	*/	259	*/
253		260

Subversion Repositories HelenOS

(root)/trunk/kernel/generic/src/lib/elf.c – Rev 2745 → 3007