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elf2uf2: Use LMA (instead of VMA) of entry_point to determine whether binary is flash/RAM (#1187)

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Graham Sanderson 2023-01-26 10:04:48 -06:00 committed by GitHub
parent 260df95e44
commit 78d7a2522f
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 84 additions and 52 deletions
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48
tools/elf2uf2/main.cpp
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@ -129,7 +129,7 @@ int check_address_range(const address_ranges& valid_ranges, uint32_t addr, uint3
for(const auto& range : valid_ranges) {
if (range.from <= addr && range.to >= addr + size) {
if (range.type == address_range::type::NO_CONTENTS && !uninitialized) {
return fail(ERROR_INCOMPATIBLE, "ELF contains memory contents for uninitialized memory");
return fail(ERROR_INCOMPATIBLE, "ELF contains memory contents for uninitialized memory at 0x%p", addr);
}
ar = range;
if (verbose) {
@ -142,20 +142,24 @@ int check_address_range(const address_ranges& valid_ranges, uint32_t addr, uint3
return fail(ERROR_INCOMPATIBLE, "Memory segment %08x->%08x is outside of valid address range for device", addr, addr+size);
}
int read_and_check_elf32_ph_entries(FILE *in, const elf32_header &eh, const address_ranges& valid_ranges, std::map<uint32_t, std::vector<page_fragment>>& pages) {
int read_elf32_ph_entries(FILE *in, const elf32_header &eh, std::vector<elf32_ph_entry>& entries) {
if (eh.ph_entry_size != sizeof(elf32_ph_entry)) {
return fail(ERROR_FORMAT, "Invalid ELF32 program header");
}
if (eh.ph_num) {
std::vector<elf32_ph_entry> entries(eh.ph_num);
entries.resize(eh.ph_num);
if (fseek(in, eh.ph_offset, SEEK_SET)) {
return fail_read_error();
}
if (eh.ph_num != fread(&entries[0], sizeof(struct elf32_ph_entry), eh.ph_num, in)) {
return fail_read_error();
}
for(uint i=0;i<eh.ph_num;i++) {
elf32_ph_entry& entry = entries[i];
}
return 0;
}
int check_elf32_ph_entries(const std::vector<elf32_ph_entry>& entries, const address_ranges& valid_ranges, std::map<uint32_t, std::vector<page_fragment>>& pages) {
for(const auto & entry : entries) {
if (entry.type == PT_LOAD && entry.memsz) {
address_range ar;
int rc;
@ -199,7 +203,6 @@ int read_and_check_elf32_ph_entries(FILE *in, const elf32_header &eh, const addr
}
}
}
}
return 0;
}
@ -242,6 +245,29 @@ static bool is_address_mapped(const std::map<uint32_t, std::vector<page_fragment
return true;
}
static int determine_binary_type(const elf32_header &eh, const std::vector<elf32_ph_entry>& entries, bool *ram_style) {
for(const auto &entry : entries) {
if (entry.type == PT_LOAD && entry.memsz) {
uint mapped_size = std::min(entry.filez, entry.memsz);
if (mapped_size) {
// we back convert the entrypoint from a VADDR to a PADDR to see if it originates in flash, and if
// so call THAT a flash binary.
if (eh.entry >= entry.vaddr && eh.entry < entry.vaddr + mapped_size) {
uint32_t effective_entry = eh.entry + entry.paddr - entry.vaddr;
if (is_address_initialized(rp2040_address_ranges_ram, effective_entry)) {
*ram_style = true;
return 0;
} else if (is_address_initialized(rp2040_address_ranges_flash, effective_entry)) {
*ram_style = false;
return 0;
}
}
}
}
}
return fail(ERROR_INCOMPATIBLE, "entry point is not in mapped part of file");
}
int elf2uf2(FILE *in, FILE *out) {
elf32_header eh;
std::map<uint32_t, std::vector<page_fragment>> pages;
@ -249,7 +275,12 @@ int elf2uf2(FILE *in, FILE *out) {
bool ram_style = false;
address_ranges valid_ranges = {};
if (!rc) {
ram_style = is_address_initialized(rp2040_address_ranges_ram, eh.entry);
std::vector<elf32_ph_entry> entries;
rc = read_elf32_ph_entries(in, eh, entries);
if (!rc) {
rc = determine_binary_type(eh, entries, &ram_style);
}
if (!rc) {
if (verbose) {
if (ram_style) {
printf("Detected RAM binary\n");
@ -258,7 +289,8 @@ int elf2uf2(FILE *in, FILE *out) {
}
}
valid_ranges = ram_style ? rp2040_address_ranges_ram : rp2040_address_ranges_flash;
rc = read_and_check_elf32_ph_entries(in, eh, valid_ranges, pages);
rc = check_elf32_ph_entries(entries, valid_ranges, pages);
}
}
if (rc) return rc;
if (pages.empty()) {