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Rev 2990 Rev 2996
Line 44... Line 44...
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#include <elf_load.h>
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#include <elf_load.h>
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#include <arch.h>
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#include <arch.h>
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runtime_env_t runtime_env;
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runtime_env_t runtime_env;
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- 
 
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void module_process_relocs(module_t *m)
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{
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    if (m->dyn.plt_rel == DT_REL) {
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        if (m->dyn.rel != NULL)
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            rel_table_process(m, m->dyn.rel, m->dyn.rel_sz);
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        /* FIXME: this seems wrong */
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        if (m->dyn.jmp_rel != NULL)
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            rel_table_process(m, m->dyn.jmp_rel, m->dyn.plt_rel_sz);
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    } else { /* (m->dyn.plt_rel == DT_RELA) */
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        printf("table type DT_RELA\n");
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        if (m->dyn.rela != NULL) {
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            printf("non-empty\n");
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            rela_table_process(m, m->dyn.rela, m->dyn.rela_sz);
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        }
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    }
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}
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void _rtld_main(void)
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void _rtld_main(void)
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{
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{
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    pcb_t *pcb;
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    pcb_t *pcb;
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    elf_info_t lib_info;
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    elf_info_t lib_info;
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    static module_t prog;
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    static module_t prog;
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    static module_t lib;
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    static module_t lib;
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    module_t *rtld;
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    module_t *rtld;
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    int rc;
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    int rc;
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    printf("Hello, world! (from rtld)\n");
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    printf("Hello, world! (from rtld)\n");
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    getchar();
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//  getchar();
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 77 
 
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    /* rtld_dynamic and rtld->bias were filled out by the bootstrap code */
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    /* rtld_dynamic and rtld->bias were filled out by the bootstrap code */
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    rtld = &runtime_env.rtld;
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    rtld = &runtime_env.rtld;
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    printf("Parse rtld .dynamic section at 0x%x\n", runtime_env.rtld_dynamic);
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    dynamic_parse(runtime_env.rtld_dynamic, rtld->bias, &rtld->dyn);
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    dynamic_parse(runtime_env.rtld_dynamic, rtld->bias, &rtld->dyn);
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//  getchar();
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 83 
 
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    printf("Parse .dynamic section\n");
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    pcb = __pcb_get();
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    pcb = __pcb_get();
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    printf("Parse program .dynamic section at 0x%x\n", pcb->dynamic);
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    dynamic_parse(pcb->dynamic, 0, &prog.dyn);
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    dynamic_parse(pcb->dynamic, 0, &prog.dyn);
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    prog.bias = 0;
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    prog.bias = 0;
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    prog.dyn.soname = "[program]";
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    prog.dyn.soname = "[program]";
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    printf("Program requested library '%s'\n", prog.dyn.needed);
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    printf("Program requested library '%s'\n", prog.dyn.needed);
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//  getchar();
72 
   
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73 
    rc = elf_load_file("/libc.so.0", 0x20000, &lib_info);
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    rc = elf_load_file("/libc.so.0", 0x20000, &lib_info);
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    if (rc < 0) {
 94 
    if (rc < 0) {
75 
        printf("failed to load library\n");
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        printf("failed to load library\n");
76 
        return;
 96 
        return;
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    runtime_env.program = &prog;
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    runtime_env.program = &prog;
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    runtime_env.libc = &lib;
 104 
    runtime_env.libc = &lib;
85 
 
 105 
 
86 
    /* Parse program's relocation tables */
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    /* Parse program's relocation tables */
87 
    printf("Resolve references in program\n");
 107 
    printf("Resolve references in program\n");
88 
    if (prog.dyn.rel != NULL)
 108 
    module_process_relocs(&prog);
89 
        rel_table_process(&prog, prog.dyn.rel, prog.dyn.rel_sz);
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90 
    if (prog.dyn.jmp_rel != NULL)
 - 
 
91 
        rel_table_process(&prog, prog.dyn.jmp_rel, prog.dyn.plt_rel_sz);
 - 
 
92 
 
 109 
 
93 
    /* Parse lib's relocation tables */
 110 
    /* Parse lib's relocation tables */
94 
    printf("Resolve references in library\n");
 111 
    printf("Resolve references in library\n");
95 
    if (lib.dyn.rel != NULL)
 - 
 
96 
        rel_table_process(&lib, lib.dyn.rel, lib.dyn.rel_sz);
 - 
 
97 
    if (lib.dyn.jmp_rel != NULL)
 112 
    module_process_relocs(&lib);
98 
        rel_table_process(&lib, lib.dyn.jmp_rel, lib.dyn.plt_rel_sz);
 - 
 
99 
 
 113 
 
100 
    printf("lib.bias=0x%x\n", lib.bias);
 114 
    printf("lib.bias=0x%x\n", lib.bias);
101 
 
 115 
 
102 
    printf("Run program..\n");
 116 
    printf("Run program.. (at 0x%x)\n", (uintptr_t)pcb->entry);
- 
 
 117 
    getchar();
103 
    pcb->entry();
 118 
    pcb->entry();
104 
}
 119 
}
105 
 
 120 
 
106 
/** @}
 121 
/** @}
107 
 */
 122 
 */