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util/nvmutil: even safer pointer comparison

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we assert now that ulong is the size of a pointer,
therefore we know that it can fit a pointer reliably.

this code is written for c90 spec so lacks uintptr

Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-14 19:13:12 +00:00
parent feb4db34a2
commit 58a80f8c3f
1 changed files with 8 additions and 5 deletions
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13
util/nvmutil/nvmutil.c
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@@ -246,6 +246,9 @@ typedef char static_assert_int_ge_32[(sizeof(int) >= 4) ? 1 : -1];
typedef char static_assert_twos_complement[
((-1 & 3) == 3) ? 1 : -1
];
typedef char assert_ulong_ptr[
(sizeof(ulong) >= sizeof(void *)) ? 1 : -1
];
/*
* We set _FILE_OFFSET_BITS 64, but we only handle
@@ -1801,15 +1804,15 @@ static ssize_t
rw_gbe_file_exact(int fd, u8 *mem, size_t nrw,
off_t off, int rw_type)
{
size_t mem_addr;
size_t buf_addr;
size_t buf_end;
ulong mem_addr;
ulong buf_addr;
ulong buf_end;
if (mem == NULL)
goto err_rw_gbe_file_exact;
mem_addr = (size_t)(void *)mem;
buf_addr = (size_t)(void *)buf;
mem_addr = (ulong)(void *)mem;
buf_addr = (ulong)(void *)buf;
buf_end = buf_addr + GBE_FILE_SIZE;
if (mem != (void *)pad &&