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semihosting: Clean up common_semi_flen_cb

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Do not read from the gdb struct stat buffer if the callback is
reporting an error. Use common_semi_cb to finish returning results.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-05-16 19:34:06 -07:00
parent 709fe27b18
commit 84ca0dfd1e
1 changed files with 11 additions and 9 deletions
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20
semihosting/arm-compat-semi.c
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@ -346,15 +346,17 @@ static target_ulong common_semi_flen_buf(CPUState *cs)
static void
common_semi_flen_cb(CPUState *cs, target_ulong ret, target_ulong err)
{
/* The size is always stored in big-endian order, extract
the value. We assume the size always fit in 32 bits. */
uint32_t size;
cpu_memory_rw_debug(cs, common_semi_flen_buf(cs) + 32,
(uint8_t *)&size, 4, 0);
size = be32_to_cpu(size);
common_semi_set_ret(cs, size);
errno = err;
set_swi_errno(cs, -1);
if (!err) {
/*
* The size is always stored in big-endian order, extract
* the value. We assume the size always fit in 32 bits.
*/
uint32_t size;
cpu_memory_rw_debug(cs, common_semi_flen_buf(cs) + 32,
(uint8_t *)&size, 4, 0);
ret = be32_to_cpu(size);
}
common_semi_cb(cs, ret, err);
}
static int common_semi_open_guestfd;