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Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [h8300/] [kernel/] [module.c] - Blame information for rev 3

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#include <linux/moduleloader.h>
#include <linux/elf.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/kernel.h>
 
#if 0
#define DEBUGP printk
#else
#define DEBUGP(fmt...)
#endif
 
void *module_alloc(unsigned long size)
{
        if (size == 0)
                return NULL;
        return vmalloc(size);
}
 
 
/* Free memory returned from module_alloc */
void module_free(struct module *mod, void *module_region)
{
        vfree(module_region);
        /* FIXME: If module_region == mod->init_region, trim exception
           table entries. */
}
 
/* We don't need anything special. */
int module_frob_arch_sections(Elf_Ehdr *hdr,
                              Elf_Shdr *sechdrs,
                              char *secstrings,
                              struct module *mod)
{
        return 0;
}
 
int apply_relocate(Elf32_Shdr *sechdrs,
                   const char *strtab,
                   unsigned int symindex,
                   unsigned int relsec,
                   struct module *me)
{
        printk(KERN_ERR "module %s: RELOCATION unsupported\n",
               me->name);
        return -ENOEXEC;
}
 
int apply_relocate_add(Elf32_Shdr *sechdrs,
                       const char *strtab,
                       unsigned int symindex,
                       unsigned int relsec,
                       struct module *me)
{
        unsigned int i;
        Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
 
        DEBUGP("Applying relocate section %u to %u\n", relsec,
               sechdrs[relsec].sh_info);
        for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) {
                /* This is where to make the change */
                uint32_t *loc = (uint32_t *)(sechdrs[sechdrs[relsec].sh_info].sh_addr
                                             + rela[i].r_offset);
                /* This is the symbol it is referring to.  Note that all
                   undefined symbols have been resolved.  */
                Elf32_Sym *sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
                        + ELF32_R_SYM(rela[i].r_info);
                uint32_t v = sym->st_value + rela[i].r_addend;
 
                switch (ELF32_R_TYPE(rela[i].r_info)) {
                case R_H8_DIR24R8:
                        loc = (uint32_t *)((uint32_t)loc - 1);
                        *loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v);
                        break;
                case R_H8_DIR24A8:
                        if (ELF32_R_SYM(rela[i].r_info))
                                *loc += v;
                        break;
                case R_H8_DIR32:
                case R_H8_DIR32A16:
                        *loc += v;
                        break;
                case R_H8_PCREL16:
                        v -= (unsigned long)loc + 2;
                        if ((Elf32_Sword)v > 0x7fff ||
                            (Elf32_Sword)v < -(Elf32_Sword)0x8000)
                                goto overflow;
                        else
                                *(unsigned short *)loc = v;
                        break;
                case R_H8_PCREL8:
                        v -= (unsigned long)loc + 1;
                        if ((Elf32_Sword)v > 0x7f ||
                            (Elf32_Sword)v < -(Elf32_Sword)0x80)
                                goto overflow;
                        else
                                *(unsigned char *)loc = v;
                        break;
                default:
                        printk(KERN_ERR "module %s: Unknown relocation: %u\n",
                               me->name, ELF32_R_TYPE(rela[i].r_info));
                        return -ENOEXEC;
                }
        }
        return 0;
 overflow:
        printk(KERN_ERR "module %s: relocation offset overflow: %08x\n",
               me->name, rela[i].r_offset);
        return -ENOEXEC;
}
 
int module_finalize(const Elf_Ehdr *hdr,
                    const Elf_Shdr *sechdrs,
                    struct module *me)
{
        return 0;
}
 
void module_arch_cleanup(struct module *mod)
{
}

Line No.	Rev	Author	Line
1	3	xianfeng	`#include <linux/moduleloader.h>`
2			`#include <linux/elf.h>`
3			`#include <linux/vmalloc.h>`
4			`#include <linux/fs.h>`
5			`#include <linux/string.h>`
6			`#include <linux/kernel.h>`
7
8			`#if 0`
9			`#define DEBUGP printk`
10			`#else`
11			`#define DEBUGP(fmt...)`
12			`#endif`
13
14			`void *module_alloc(unsigned long size)`
15			`{`
16			`if (size == 0)`
17			`return NULL;`
18			`return vmalloc(size);`
19			`}`
20
21
22			`/* Free memory returned from module_alloc */`
23			`void module_free(struct module mod, void module_region)`
24			`{`
25			`vfree(module_region);`
26			`/* FIXME: If module_region == mod->init_region, trim exception`
27			`table entries. */`
28			`}`
29
30			`/* We don't need anything special. */`
31			`int module_frob_arch_sections(Elf_Ehdr *hdr,`
32			`Elf_Shdr *sechdrs,`
33			`char *secstrings,`
34			`struct module *mod)`
35			`{`
36			`return 0;`
37			`}`
38
39			`int apply_relocate(Elf32_Shdr *sechdrs,`
40			`const char *strtab,`
41			`unsigned int symindex,`
42			`unsigned int relsec,`
43			`struct module *me)`
44			`{`
45			`printk(KERN_ERR "module %s: RELOCATION unsupported\n",`
46			`me->name);`
47			`return -ENOEXEC;`
48			`}`
49
50			`int apply_relocate_add(Elf32_Shdr *sechdrs,`
51			`const char *strtab,`
52			`unsigned int symindex,`
53			`unsigned int relsec,`
54			`struct module *me)`
55			`{`
56			`unsigned int i;`
57			`Elf32_Rela rela = (void )sechdrs[relsec].sh_addr;`
58
59			`DEBUGP("Applying relocate section %u to %u\n", relsec,`
60			`sechdrs[relsec].sh_info);`
61			`for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) {`
62			`/* This is where to make the change */`
63			`uint32_t loc = (uint32_t )(sechdrs[sechdrs[relsec].sh_info].sh_addr`
64			`+ rela[i].r_offset);`
65			`/* This is the symbol it is referring to. Note that all`
66			`undefined symbols have been resolved. */`
67			`Elf32_Sym sym = (Elf32_Sym )sechdrs[symindex].sh_addr`
68			`+ ELF32_R_SYM(rela[i].r_info);`
69			`uint32_t v = sym->st_value + rela[i].r_addend;`
70
71			`switch (ELF32_R_TYPE(rela[i].r_info)) {`
72			`case R_H8_DIR24R8:`
73			`loc = (uint32_t *)((uint32_t)loc - 1);`
74			`loc = (loc & 0xff000000) \| ((*loc & 0xffffff) + v);`
75			`break;`
76			`case R_H8_DIR24A8:`
77			`if (ELF32_R_SYM(rela[i].r_info))`
78			`*loc += v;`
79			`break;`
80			`case R_H8_DIR32:`
81			`case R_H8_DIR32A16:`
82			`*loc += v;`
83			`break;`
84			`case R_H8_PCREL16:`
85			`v -= (unsigned long)loc + 2;`
86			`if ((Elf32_Sword)v > 0x7fff \|\|`
87			`(Elf32_Sword)v < -(Elf32_Sword)0x8000)`
88			`goto overflow;`
89			`else`
90			`(unsigned short )loc = v;`
91			`break;`
92			`case R_H8_PCREL8:`
93			`v -= (unsigned long)loc + 1;`
94			`if ((Elf32_Sword)v > 0x7f \|\|`
95			`(Elf32_Sword)v < -(Elf32_Sword)0x80)`
96			`goto overflow;`
97			`else`
98			`(unsigned char )loc = v;`
99			`break;`
100			`default:`
101			`printk(KERN_ERR "module %s: Unknown relocation: %u\n",`
102			`me->name, ELF32_R_TYPE(rela[i].r_info));`
103			`return -ENOEXEC;`
104			`}`
105			`}`
106			`return 0;`
107			`overflow:`
108			`printk(KERN_ERR "module %s: relocation offset overflow: %08x\n",`
109			`me->name, rela[i].r_offset);`
110			`return -ENOEXEC;`
111			`}`
112
113			`int module_finalize(const Elf_Ehdr *hdr,`
114			`const Elf_Shdr *sechdrs,`
115			`struct module *me)`
116			`{`
117			`return 0;`
118			`}`
119
120			`void module_arch_cleanup(struct module *mod)`
121			`{`
122			`}`

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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [h8300/] [kernel/] [module.c] - Blame information for rev 3