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elf: fix cache flushing in 'bootelf -p' command

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Currently there are two problems in 'bootelf -p' (load elf by segments)
command:
- bss section is not flushed, so booted elf can have non zero values
  in bss;
- at least on ARM there are 'CACHE: Misaligned operation at
  range...' warnings

Use p_memsz instead of p_filesz during cache flushing for elf segment.
p_filesz doesn't include zero initialized memory (e.g. bss section),
which also should be flushed.

Align these cache flushes to line boundaries.

Signed-off-by: Kurban Mallachiev <mallachiev@ispras.ru>
This commit is contained in:
Kurban Mallachiev 2019-02-07 14:19:45 +03:00 • committed by Tom Rini
parent eaba7df704
commit 957f51e863
1 changed files with 4 additions and 2 deletions
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6
cmd/elf.c
View file

@ -53,7 +53,8 @@ static unsigned long load_elf64_image_phdr(unsigned long addr)
if (phdr->p_filesz != phdr->p_memsz)
memset(dst + phdr->p_filesz, 0x00,
phdr->p_memsz - phdr->p_filesz);
flush_cache((unsigned long)dst, phdr->p_filesz);
flush_cache(rounddown((unsigned long)dst, ARCH_DMA_MINALIGN),
roundup(phdr->p_memsz, ARCH_DMA_MINALIGN));
++phdr;
}
@ -167,7 +168,8 @@ static unsigned long load_elf_image_phdr(unsigned long addr)
if (phdr->p_filesz != phdr->p_memsz)
memset(dst + phdr->p_filesz, 0x00,
phdr->p_memsz - phdr->p_filesz);
flush_cache((unsigned long)dst, phdr->p_filesz);
flush_cache(rounddown((unsigned long)dst, ARCH_DMA_MINALIGN),
roundup(phdr->p_memsz, ARCH_DMA_MINALIGN));
++phdr;
}