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[CHANGED] elfwriter now outputs 3 segments/phdrs: text, data, bss (with new sizes)

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sjs 2009-05-19 17:31:31 -07:00
parent a93c8d2fa6
commit b7a4b408bb
1 changed files with 36 additions and 14 deletions
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50
elfwriter.c
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@ -47,7 +47,7 @@ elf_write(const char *filename, uint8_t *code, size_t code_size)
Elf_Scn *scn; Elf_Scn *scn;
Elf_Data *data; Elf_Data *data;
Elf32_Ehdr *ehdr; Elf32_Ehdr *ehdr;
Elf32_Phdr *phdr, *load; Elf32_Phdr *phdr;
Elf32_Shdr *shdr; Elf32_Shdr *shdr;
if (elf_version(EV_CURRENT) == EV_NONE) { if (elf_version(EV_CURRENT) == EV_NONE) {
@ -89,12 +89,12 @@ elf_write(const char *filename, uint8_t *code, size_t code_size)
/******************* /*******************
* Program Headers * * Program Headers *
*******************/ *******************/
if ((phdr = elf32_newphdr(elf, 2)) == NULL) { /* 3 segments => 3 program headers (text, data, bss) */
if ((phdr = elf32_newphdr(elf, 3)) == NULL) {
printf("elf32_newphdr failed!\n"); printf("elf32_newphdr failed!\n");
return -5; return -5;
} }
load = phdr+1;
/***************** /*****************
@ -202,17 +202,39 @@ elf_write(const char *filename, uint8_t *code, size_t code_size)
return -12; return -12;
} }
phdr->p_vaddr = phdr->p_paddr = 0x8048000 + ehdr->e_phoff; /* phdr->p_vaddr = phdr->p_paddr = 0x8048000 + ehdr->e_phoff; */
phdr->p_type = PT_PHDR; /* phdr->p_type = PT_PHDR; */
phdr->p_offset = ehdr->e_phoff; /* phdr->p_offset = ehdr->e_phoff; */
phdr->p_filesz = elf32_fsize(ELF_T_PHDR, 1, EV_CURRENT); /* phdr->p_filesz = elf32_fsize(ELF_T_PHDR, 1, EV_CURRENT); */
load->p_vaddr = phdr->p_paddr = 0x8048000; /* text segment */
load->p_type = PT_LOAD; phdr->p_vaddr = text_addr;
load->p_offset = 0; phdr->p_type = PT_LOAD;
load->p_filesz = elf32_fsize(ELF_T_PHDR, 1, EV_CURRENT); phdr->p_offset = header_size;
load->p_flags = PF_R | PF_X; phdr->p_filesz = text_size;
load->p_align = 0x1000; phdr->p_memsz = text_size;
phdr->p_flags = PF_R | PF_X;
phdr->p_align = 0x1000;
/* data segment */
phdr++;
phdr->p_vaddr = data_addr;
phdr->p_type = PT_LOAD;
phdr->p_offset = header_size + text_size;
phdr->p_filesz = data_size;
phdr->p_memsz = data_size + 0x1024; /* XXX unsure why the abi specifies + 0x1024 */
phdr->p_flags = PF_R | PF_W | PF_X;
phdr->p_align = 0x1000;
/* bss segment */
phdr++;
phdr->p_vaddr = bss_addr;
phdr->p_type = PT_LOAD;
phdr->p_offset = header_size + text_size + data_size;
phdr->p_filesz = bss_size;
phdr->p_memsz = bss_size;
phdr->p_flags = PF_R | PF_W;
phdr->p_align = 0x1000;
elf_flagphdr(elf, ELF_C_SET, ELF_F_DIRTY); elf_flagphdr(elf, ELF_C_SET, ELF_F_DIRTY);