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elf_loader: add elf_loadmem() to load file from memory

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Change-Id: Ib68b0e8b610d45713a2d5480da015cc4295f2676
This commit is contained in:
Aidan MacDonald 2026-01-10 22:05:21 +00:00
parent 843322f898
commit 7868e45edb
2 changed files with 38 additions and 0 deletions
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26
firmware/elf_loader.c
View file

@ -183,3 +183,29 @@ int elf_loadpath(const char *filename,
close(fd);
return err;
}
int elf_loadmem(const void *elf_buffer,
size_t elf_size,
const struct elf_load_context *ctx,
void **entrypoint)
{
struct elf_loadmem_state state = {
.buffer = elf_buffer,
.size = elf_size,
};
return elf_load(elf_read_mem_callback, (intptr_t)&state, ctx, entrypoint);
}
int elf_read_mem_callback(intptr_t loadmem_state, off_t pos, void *buf, size_t size)
{
struct elf_loadmem_state *state = (void *)loadmem_state;
if (pos < 0 || (size_t)pos >= state->size)
return -1;
if (state->size - (size_t)pos < size)
return -1;
memcpy(buf, state->buffer + pos, size);
return 0;
}

12
firmware/include/elf_loader.h
View file

@ -100,4 +100,16 @@ int elf_loadpath(const char *filename,
const struct elf_load_context *ctx,
void **entrypoint);
struct elf_loadmem_state
{
const void *buffer;
size_t size;
};
int elf_loadmem(const void *elf_buffer,
size_t elf_size,
const struct elf_load_context *ctx,
void **entrypoint);
int elf_read_mem_callback(intptr_t loadmem_state, off_t pos, void *buf, size_t size);
#endif /* __ELF_LOADER_H__ */