forked from len0rd/rockbox
rknanotools: fix rknano stages processing
Change-Id: Ia88f5aa2a6c56b312f80b31afab41d1dc68b871b
This commit is contained in:
Amaury Pouly
Solomon Peachy
parent
d22bb548b2
commit
b8d35c042d
3 changed files with 212 additions and 81 deletions
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@ -21,6 +21,14 @@
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#include "elf.h"
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#include "misc.h"
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static char *strdup(const char *str)
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{
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int len = strlen(str);
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char *s = malloc(len + 1);
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memcpy(s, str, len + 1);
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return s;
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}
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/**
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* Definitions
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* taken from elf.h linux header
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@ -189,43 +197,55 @@ static struct elf_segment_t *elf_add_segment(struct elf_params_t *params)
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}
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void elf_add_load_section(struct elf_params_t *params,
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uint32_t load_addr, uint32_t size, const void *section)
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uint32_t load_addr, uint32_t size, const void *section, const char *name)
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{
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struct elf_section_t *sec = elf_add_section(params);
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char buffer[32];
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if(name == NULL)
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{
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sprintf(buffer, ".text%d", params->unique_index++);
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name = buffer;
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}
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sec->type = EST_LOAD;
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sec->addr = load_addr;
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sec->size = size;
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sec->section = xmalloc(size);
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sec->name = strdup(name);
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memcpy(sec->section, section, size);
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}
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void elf_add_fill_section(struct elf_params_t *params,
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uint32_t fill_addr, uint32_t size, uint32_t pattern)
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{
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char buffer[32];
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sprintf(buffer, ".bss%d", params->unique_index++);
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if(pattern != 0x00)
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{
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printf("oops, non-zero filling, ignore fill section\n");
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return;
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}
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struct elf_section_t *sec = elf_add_section(params);
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sec->type = EST_FILL;
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sec->addr = fill_addr;
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sec->size = size;
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sec->pattern = pattern;
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sec->name = strdup(buffer);
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}
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void elf_write_file(struct elf_params_t *params, elf_write_fn_t write,
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elf_printf_fn_t printf, void *user)
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{
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(void) printf;
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Elf32_Ehdr ehdr;
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uint32_t phnum = 0;
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struct elf_section_t *sec = params->first_section;
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uint32_t offset = 0;
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uint32_t strtbl_size = 1; /* offset 0 is for the NULL name */
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Elf32_Phdr phdr;
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Elf32_Shdr shdr;
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memset(&ehdr, 0, EI_NIDENT);
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@ -241,7 +261,9 @@ void elf_write_file(struct elf_params_t *params, elf_write_fn_t write,
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{
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sec->offset = 0;
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}
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sec->name_offset = strtbl_size;
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strtbl_size += strlen(sec->name) + 1;
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phnum++;
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sec = sec->next;
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}
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@ -275,16 +297,14 @@ void elf_write_file(struct elf_params_t *params, elf_write_fn_t write,
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write(user, 0, &ehdr, sizeof ehdr);
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/* allocate enough size to hold any combinaison of .text/.bss in the string table:
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* - one empty name ("\0")
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* - at most N names of the form ".textXXXX\0" or ".bssXXXX\0"
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* - one name ".shstrtab\0" */
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char *strtbl_content = malloc(1 + strlen(".shstrtab") + 1 +
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phnum * (strlen(".textXXXX") + 1));
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/* the last name offset gives the size of the section, we need to add a small
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* amount of .shstrtab name */
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uint32_t shstrtab_index = strtbl_size;
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strtbl_size += strlen(".shstrtab") + 1;
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char *strtbl_content = malloc(strtbl_size);
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/* create NULL and shstrtab names */
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strtbl_content[0] = '\0';
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strcpy(&strtbl_content[1], ".shstrtab");
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uint32_t strtbl_index = 1 + strlen(".shstrtab") + 1;
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strcpy(&strtbl_content[shstrtab_index], ".shstrtab");
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uint32_t data_offset = ehdr.e_ehsize + ehdr.e_phnum * ehdr.e_phentsize +
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ehdr.e_shnum * ehdr.e_shentsize;
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@ -294,7 +314,8 @@ void elf_write_file(struct elf_params_t *params, elf_write_fn_t write,
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while(sec)
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{
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sec->offset += data_offset;
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strcpy(&strtbl_content[sec->name_offset], sec->name);
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phdr.p_type = PT_LOAD;
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if(sec->type == EST_LOAD)
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phdr.p_offset = sec->offset;
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@ -336,21 +357,13 @@ void elf_write_file(struct elf_params_t *params, elf_write_fn_t write,
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offset += sizeof(Elf32_Shdr);
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}
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uint32_t text_idx = 0;
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uint32_t bss_idx = 0;
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while(sec)
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{
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shdr.sh_name = strtbl_index;
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shdr.sh_name = sec->name_offset;
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if(sec->type == EST_LOAD)
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{
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strtbl_index += 1 + sprintf(&strtbl_content[strtbl_index], ".text%d", text_idx++);
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shdr.sh_type = SHT_PROGBITS;
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}
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else
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{
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strtbl_index += 1 + sprintf(&strtbl_content[strtbl_index], ".bss%d", bss_idx++);
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shdr.sh_type = SHT_NOBITS;
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}
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shdr.sh_flags = SHF_ALLOC | SHF_EXECINSTR;
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shdr.sh_addr = sec->addr;
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shdr.sh_offset = sec->offset;
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@ -367,12 +380,12 @@ void elf_write_file(struct elf_params_t *params, elf_write_fn_t write,
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}
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{
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shdr.sh_name = 1;
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shdr.sh_name = shstrtab_index;
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shdr.sh_type = SHT_STRTAB;
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shdr.sh_flags = 0;
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shdr.sh_addr = 0;
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shdr.sh_offset = strtbl_offset + data_offset;
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shdr.sh_size = strtbl_index;
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shdr.sh_size = strtbl_size;
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shdr.sh_link = SHN_UNDEF;
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shdr.sh_info = 0;
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shdr.sh_addralign = 1;
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@ -391,7 +404,7 @@ void elf_write_file(struct elf_params_t *params, elf_write_fn_t write,
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sec = sec->next;
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}
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write(user, strtbl_offset + data_offset, strtbl_content, strtbl_index);
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write(user, strtbl_offset + data_offset, strtbl_content, strtbl_size);
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free(strtbl_content);
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}
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@ -399,7 +412,7 @@ bool elf_read_file(struct elf_params_t *params, elf_read_fn_t read,
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elf_printf_fn_t printf, void *user)
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{
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#define error_printf(...) ({printf(user, true, __VA_ARGS__); return false;})
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/* read header */
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Elf32_Ehdr ehdr;
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if(!read(user, 0, &ehdr, sizeof(ehdr)))
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@ -459,7 +472,7 @@ bool elf_read_file(struct elf_params_t *params, elf_read_fn_t read,
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void *data = xmalloc(shdr.sh_size);
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if(!read(user, shdr.sh_offset, data, shdr.sh_size))
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error_printf("error read self section data\n");
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elf_add_load_section(params, shdr.sh_addr, shdr.sh_size, data);
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elf_add_load_section(params, shdr.sh_addr, shdr.sh_size, data, NULL);
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free(data);
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if(strtab)
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@ -476,7 +489,6 @@ bool elf_read_file(struct elf_params_t *params, elf_read_fn_t read,
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if(strtab)
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printf(user, false, "filter out %s\n", &strtab[shdr.sh_name], shdr.sh_type);
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}
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}
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free(strtab);
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/* run through segments */
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@ -562,6 +574,7 @@ void elf_release(struct elf_params_t *params)
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struct elf_section_t *next_sec = sec->next;
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if(sec->type == EST_LOAD)
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free(sec->section);
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free(sec->name);
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free(sec);
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sec = next_sec;
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}
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@ -42,6 +42,7 @@ struct elf_section_t
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uint32_t addr; /* virtual address */
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uint32_t size; /* virtual size */
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enum elf_section_type_t type;
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char *name;
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/* <union> */
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void *section; /* data */
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uint32_t pattern; /* fill pattern */
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@ -49,6 +50,7 @@ struct elf_section_t
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struct elf_section_t *next;
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/* Internal to elf_write_file */
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uint32_t offset;
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uint32_t name_offset;
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};
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struct elf_segment_t
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@ -68,6 +70,7 @@ struct elf_params_t
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struct elf_section_t *last_section;
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struct elf_segment_t *first_segment;
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struct elf_segment_t *last_segment;
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int unique_index;
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};
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typedef bool (*elf_read_fn_t)(void *user, uint32_t addr, void *buf, size_t count);
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@ -77,7 +80,7 @@ typedef void (*elf_printf_fn_t)(void *user, bool error, const char *fmt, ...);
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void elf_init(struct elf_params_t *params);
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void elf_add_load_section(struct elf_params_t *params,
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uint32_t load_addr, uint32_t size, const void *section);
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uint32_t load_addr, uint32_t size, const void *section, const char *name);
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void elf_add_fill_section(struct elf_params_t *params,
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uint32_t fill_addr, uint32_t size, uint32_t pattern);
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uint32_t elf_translate_virtual_address(struct elf_params_t *params, uint32_t addr);
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@ -15,6 +15,11 @@ bool g_debug = false;
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typedef uint8_t packed_bcd_uint8_t;
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typedef uint16_t packed_bcd_uint16_t;
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/**
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* RKnanoFW
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* contains resources and code stages
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*/
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struct rknano_date_t
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{
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packed_bcd_uint16_t year;
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@ -176,7 +181,7 @@ static void save_blob(const struct rknano_blob_t *b, void *buf, uint32_t size,
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}
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encode_page(buff_ptr, out_ptr, len);
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}
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if(f)
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{
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fwrite(ptr, b->size, 1, f);
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@ -276,6 +281,11 @@ static int do_nanofw_image(uint8_t *buf, unsigned long size)
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return 0;
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}
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/**
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* RKNano stage
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* contains code and memory mapping
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*/
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struct rknano_stage_header_t
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{
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uint32_t addr;
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@ -283,21 +293,28 @@ struct rknano_stage_header_t
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} __attribute__((packed));
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/*
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* The [code_pa,code_pa+code_sz[ and [data_pa,data_pa+data_sz[ ranges
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* are consistent: they never overlap and have no gaps and fill the
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* entire space. Furthermore they match the code sequences so it's
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* reasonable to assume these fields are correct.
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* The other fields are still quite unsure. */
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* NOTE this theory has not been tested against actual code, it's still a guess
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* The firmware is too big to fit in memory so it's split into sections,
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* each section having a "virtual address" and a "physical address".
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* Except it gets tricky because the RKNano doesn't have a MMU but a MPU,
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* so most probably the OF divides the memory into regions (8 would match
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* hardware capabilities), each being able to contain one of the sections
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* in the OF file. To gracefully handle jumps between sections, my guess is
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* that the entire OF is linked as a flat image, cut into pieces and
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* then each code section get relocated except for jump/calls outside of it:
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* this will trigger an access fault when trying to access another section, which
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* the OF can trap and then load the corresponding section.
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*/
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struct rknano_stage_section_t
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{
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uint32_t code_pa;
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uint32_t code_va;
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uint32_t code_pa;
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uint32_t code_sz;
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uint32_t data_pa;
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uint32_t data_va;
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uint32_t data_pa;
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uint32_t data_sz;
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uint32_t bss_va;
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uint32_t bss_pa;
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uint32_t bss_sz;
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} __attribute__((packed));
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@ -319,14 +336,14 @@ static void elf_write(void *user, uint32_t addr, const void *buf, size_t count)
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fwrite(buf, count, 1, f);
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}
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static void extract_elf_section(struct elf_params_t *elf, int count)
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static void extract_elf_section(struct elf_params_t *elf)
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{
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if(g_out_prefix == NULL)
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return;
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char *filename = xmalloc(strlen(g_out_prefix) + 32);
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sprintf(filename, "%s%d.elf", g_out_prefix, count);
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sprintf(filename, "%s.elf", g_out_prefix);
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if(g_debug)
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printf("Write entry %d to %s\n", count, filename);
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printf("Write stage to %s\n", filename);
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FILE *fd = fopen(filename, "wb");
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free(filename);
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@ -337,67 +354,149 @@ static void extract_elf_section(struct elf_params_t *elf, int count)
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fclose(fd);
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}
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struct range_t
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{
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unsigned long start, size;
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int section;
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int type;
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};
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int range_cmp(const void *_a, const void *_b)
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{
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const struct range_t *a = _a, *b = _b;
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if(a->start == b->start)
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return a->size - b->size;
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return a->start - b->start;
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}
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#define RANGE_TXT 0
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#define RANGE_DAT 1
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static int do_nanostage_image(uint8_t *buf, unsigned long size)
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{
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if(size < sizeof(struct rknano_stage_section_t))
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return 1;
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struct rknano_stage_header_t *hdr = (void *)buf;
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size_t hdr_size = sizeof(struct rknano_stage_header_t) +
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hdr->count * sizeof(struct rknano_stage_section_t);
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if(size < hdr_size)
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return 1;
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cprintf(BLUE, "Header\n");
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cprintf(GREEN, " Base Address: ");
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cprintf(YELLOW, "%#08x\n", hdr->addr);
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cprintf(GREEN, " Load count: ");
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cprintf(GREEN, " Section count: ");
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cprintf(YELLOW, "%d\n", hdr->count);
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struct rknano_stage_section_t *sec = (void *)(hdr + 1);
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struct rknano_stage_section_t *sec = (void *)(hdr + 1);
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struct elf_params_t elf;
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elf_init(&elf);
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bool error = false;
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/* track range for overlap */
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struct range_t *ranges = malloc(sizeof(struct range_t) * 2 * hdr->count);
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int nr_ranges = 0;
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for(unsigned i = 0; i < hdr->count; i++, sec++)
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{
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cprintf(BLUE, "Section %d\n", i);
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cprintf(GREEN, " Code: ");
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cprintf(YELLOW, "0x%08x", sec->code_pa);
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cprintf(RED, "-(txt)-");
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cprintf(YELLOW, "0x%08x", sec->code_pa + sec->code_sz);
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cprintf(BLUE, " |--> ");
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cprintf(YELLOW, "0x%08x", sec->code_va);
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cprintf(RED, "-(txt)-");
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cprintf(YELLOW, "0x%08x\n", sec->code_va + sec->code_sz);
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cprintf(YELLOW, "0x%08x", sec->code_va + sec->code_sz);
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cprintf(BLUE, " |--> ");
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cprintf(YELLOW, "0x%08x", sec->code_pa);
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cprintf(RED, "-(txt)-");
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cprintf(YELLOW, "0x%08x\n", sec->code_pa + sec->code_sz);
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/* add ranges */
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ranges[nr_ranges].start = sec->code_va;
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ranges[nr_ranges].size = sec->code_sz;
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ranges[nr_ranges].section = i;
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ranges[nr_ranges].type = RANGE_TXT;
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ranges[nr_ranges + 1].start = sec->data_va;
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ranges[nr_ranges + 1].size = sec->data_sz;
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ranges[nr_ranges + 1].section = i;
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ranges[nr_ranges + 1].type = RANGE_DAT;
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nr_ranges += 2;
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cprintf(GREEN, " Data: ");
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cprintf(YELLOW, "0x%08x", sec->data_pa);
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cprintf(RED, "-(dat)-");
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cprintf(YELLOW, "0x%08x", sec->data_pa + sec->data_sz);
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cprintf(BLUE, " |--> ");
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cprintf(YELLOW, "0x%08x", sec->data_va);
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cprintf(RED, "-(dat)-");
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cprintf(YELLOW, "0x%08x\n", sec->data_va + sec->data_sz);
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cprintf(YELLOW, "0x%08x", sec->data_va + sec->data_sz);
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cprintf(BLUE, " |--> ");
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cprintf(YELLOW, "0x%08x", sec->data_pa);
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cprintf(RED, "-(dat)-");
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cprintf(YELLOW, "0x%08x\n", sec->data_pa + sec->data_sz);
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cprintf(GREEN, " Data: ");
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cprintf(RED, " ");
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cprintf(BLUE, " |--> ");
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cprintf(YELLOW, "0x%08x", sec->bss_va);
|
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cprintf(YELLOW, "0x%08x", sec->bss_pa);
|
||||
cprintf(RED, "-(bss)-");
|
||||
cprintf(YELLOW, "0x%08x\n", sec->bss_va + sec->bss_sz);
|
||||
cprintf(YELLOW, "0x%08x\n", sec->bss_pa + sec->bss_sz);
|
||||
|
||||
#if 0
|
||||
struct rknano_blob_t blob;
|
||||
blob.offset = sec->code_pa - hdr->addr;
|
||||
blob.size = sec->code_sz;
|
||||
save_blob(&blob, buf, size, "entry.", i, NO_ENC);
|
||||
#else
|
||||
struct elf_params_t elf;
|
||||
elf_init(&elf);
|
||||
elf_add_load_section(&elf, sec->code_va, sec->code_sz, buf + sec->code_pa - hdr->addr);
|
||||
elf_add_load_section(&elf, sec->data_va, sec->data_sz, buf + sec->data_pa - hdr->addr);
|
||||
elf_add_fill_section(&elf, sec->bss_va, sec->bss_sz, 0);
|
||||
extract_elf_section(&elf, i);
|
||||
elf_release(&elf);
|
||||
#endif
|
||||
#define check_range_(start,sz) \
|
||||
((start) >= hdr_size && (start) + (sz) <= size)
|
||||
#define check_range(start,sz) \
|
||||
((start) >= hdr->addr && check_range_((start) - hdr->addr, sz))
|
||||
/* check ranges */
|
||||
if(sec->code_sz != 0 && !check_range(sec->code_va, sec->code_sz))
|
||||
{
|
||||
cprintf(GREY, "Invalid stage: out of bound code\n");
|
||||
error = true;
|
||||
break;
|
||||
}
|
||||
if(sec->data_sz != 0 && !check_range(sec->data_va, sec->data_sz))
|
||||
{
|
||||
cprintf(GREY, "Invalid stage: out of bound data\n");
|
||||
error = true;
|
||||
break;
|
||||
}
|
||||
#undef check_range_
|
||||
#undef check_range
|
||||
|
||||
char buffer[32];
|
||||
if(sec->code_sz != 0)
|
||||
{
|
||||
sprintf(buffer, ".text.%d", i);
|
||||
elf_add_load_section(&elf, sec->code_va, sec->code_sz,
|
||||
buf + sec->code_va - hdr->addr, buffer);
|
||||
}
|
||||
if(sec->data_sz != 0)
|
||||
{
|
||||
sprintf(buffer, ".data.%d", i);
|
||||
elf_add_load_section(&elf, sec->data_va, sec->data_sz,
|
||||
buf + sec->data_va - hdr->addr, buffer);
|
||||
}
|
||||
}
|
||||
/* sort ranges and check overlap */
|
||||
qsort(ranges, nr_ranges, sizeof(struct range_t), range_cmp);
|
||||
for(int i = 1; i < nr_ranges; i++)
|
||||
{
|
||||
if(ranges[i - 1].start + ranges[i - 1].size > ranges[i].start)
|
||||
{
|
||||
error = true;
|
||||
static const char *type[] = {"txt", "dat"};
|
||||
cprintf(GREY, "Section overlap: section %d %s intersects section %d %s\n",
|
||||
ranges[i - 1].section, type[ranges[i - 1].type], ranges[i].section,
|
||||
type[ranges[i].type]);
|
||||
break;
|
||||
}
|
||||
}
|
||||
if(!error)
|
||||
extract_elf_section(&elf);
|
||||
/* FIXME for full information, we could add segments to the ELF file to
|
||||
* keep the mapping, but it's unclear if that would do any good */
|
||||
elf_release(&elf);
|
||||
free(ranges);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* RKNano BOOT
|
||||
* contains named bootloader stages
|
||||
*/
|
||||
|
||||
#define MAGIC_BOOT "BOOT"
|
||||
#define MAGIC_BOOT_SIZE 4
|
||||
|
||||
|
|
@ -428,6 +527,8 @@ struct rknano_boot_header_t
|
|||
uint32_t field_34;
|
||||
} __attribute__((packed));
|
||||
|
||||
#define BOOT_CHIP_RKNANO 0x30
|
||||
|
||||
struct rknano_boot_entry_t
|
||||
{
|
||||
uint8_t entry_size; // unsure
|
||||
|
|
@ -588,7 +689,7 @@ static int do_boot_image(uint8_t *buf, unsigned long size)
|
|||
cprintf(RED, "OK\n");
|
||||
else
|
||||
cprintf(RED, "Mismatch\n");
|
||||
|
||||
|
||||
#define print(str, name) cprintf(GREEN, " "str": ");cprintf(YELLOW, "%#x\n", (unsigned)hdr->name)
|
||||
#define print_arr(str, name, sz) \
|
||||
cprintf(GREEN, " "str":");for(int i = 0; i < sz; i++)cprintf(YELLOW, " %#x", (unsigned)hdr->name[i]);printf("\n")
|
||||
|
|
@ -602,8 +703,12 @@ static int do_boot_image(uint8_t *buf, unsigned long size)
|
|||
hdr->hour, hdr->minute, hdr->second);
|
||||
|
||||
cprintf(GREEN, " Chip: ");
|
||||
cprintf(YELLOW, "%#x\n", hdr->chip);
|
||||
|
||||
cprintf(YELLOW, "%#x ", hdr->chip);
|
||||
if(hdr->chip == BOOT_CHIP_RKNANO)
|
||||
cprintf(RED, "(RKNANO)\n");
|
||||
else
|
||||
cprintf(RED, "(unknown)\n");
|
||||
|
||||
print_arr("field_2A", field_2B, 9);
|
||||
print("field_34", field_34);
|
||||
|
||||
|
|
@ -625,10 +730,15 @@ static int do_boot_image(uint8_t *buf, unsigned long size)
|
|||
cprintf(RED, "OK\n");
|
||||
else
|
||||
cprintf(RED, "Mismatch\n");
|
||||
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* RKFW
|
||||
* contains bootloader and update
|
||||
*/
|
||||
|
||||
typedef struct rknano_blob_t rkfw_blob_t;
|
||||
|
||||
#define MAGIC_RKFW "RKFW"
|
||||
|
|
@ -637,7 +747,7 @@ typedef struct rknano_blob_t rkfw_blob_t;
|
|||
struct rkfw_header_t
|
||||
{
|
||||
char magic[MAGIC_RKFW_SIZE];
|
||||
uint16_t hdr_size; // UNSURE
|
||||
uint16_t hdr_size;
|
||||
uint32_t version;
|
||||
uint32_t code;
|
||||
uint16_t year;
|
||||
|
|
@ -652,6 +762,8 @@ struct rkfw_header_t
|
|||
uint8_t pad[61];
|
||||
} __attribute__((packed));
|
||||
|
||||
#define RKFW_CHIP_RKNANO 0x30
|
||||
|
||||
static int do_rkfw_image(uint8_t *buf, unsigned long size)
|
||||
{
|
||||
if(size < sizeof(struct rkfw_header_t))
|
||||
|
|
@ -686,8 +798,12 @@ static int do_rkfw_image(uint8_t *buf, unsigned long size)
|
|||
hdr->hour, hdr->minute, hdr->second);
|
||||
|
||||
cprintf(GREEN, " Chip: ");
|
||||
cprintf(YELLOW, "%#x\n", hdr->chip);
|
||||
|
||||
cprintf(YELLOW, "%#x ", hdr->chip);
|
||||
if(hdr->chip == RKFW_CHIP_RKNANO)
|
||||
cprintf(RED, "(RKNANO)\n");
|
||||
else
|
||||
cprintf(RED, "(unknown)\n");
|
||||
|
||||
cprintf(GREEN, " Loader: ");
|
||||
print_blob_interval(&hdr->loader);
|
||||
cprintf(OFF, "\n");
|
||||
|
|
@ -852,7 +968,7 @@ int main(int argc, char **argv)
|
|||
perror("Cannot read file");
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
fclose(fin);
|
||||
|
||||
if(try_nanofw && !do_nanofw_image(buf, size))
|
||||
|
|
@ -873,4 +989,3 @@ int main(int argc, char **argv)
|
|||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue