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target-arm/arm-semi.c: Fix SYS_HEAPINFO for 64-bit guests 

SYS_HEAPINFO is one of the few semihosting calls which has to write
values back into a parameter block in memory.  When we added
support for 64-bit semihosting we updated the code which reads from
the parameter block to read 64-bit words but forgot to change the
code that writes back into the block. Update it to treat the
block as a set of words of the appropriate width for the guest.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1466783381-29506-3-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2016-07-04 13:06:35 +01:00
parent d317091d5e
commit f5666418c4
1 changed files with 26 additions and 21 deletions
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47
target-arm/arm-semi.c
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@ -564,8 +564,10 @@ target_ulong do_arm_semihosting(CPUARMState *env)
}
case TARGET_SYS_HEAPINFO:
{
uint32_t *ptr;
target_ulong retvals[4];
uint32_t limit;
int i;
GET_ARG(0);
#ifdef CONFIG_USER_ONLY
@ -587,30 +589,33 @@ target_ulong do_arm_semihosting(CPUARMState *env)
ts->heap_limit = limit;
}
ptr = lock_user(VERIFY_WRITE, arg0, 16, 0);
if (!ptr) {
/* FIXME - should this error code be -TARGET_EFAULT ? */
return (uint32_t)-1;
}
ptr[0] = tswap32(ts->heap_base);
ptr[1] = tswap32(ts->heap_limit);
ptr[2] = tswap32(ts->stack_base);
ptr[3] = tswap32(0); /* Stack limit. */
unlock_user(ptr, arg0, 16);
retvals[0] = ts->heap_base;
retvals[1] = ts->heap_limit;
retvals[2] = ts->stack_base;
retvals[3] = 0; /* Stack limit. */
#else
limit = ram_size;
ptr = lock_user(VERIFY_WRITE, arg0, 16, 0);
if (!ptr) {
/* FIXME - should this error code be -TARGET_EFAULT ? */
return (uint32_t)-1;
}
/* TODO: Make this use the limit of the loaded application. */
ptr[0] = tswap32(limit / 2);
ptr[1] = tswap32(limit);
ptr[2] = tswap32(limit); /* Stack base */
ptr[3] = tswap32(0); /* Stack limit. */
unlock_user(ptr, arg0, 16);
retvals[0] = limit / 2;
retvals[1] = limit;
retvals[2] = limit; /* Stack base */
retvals[3] = 0; /* Stack limit. */
#endif
for (i = 0; i < ARRAY_SIZE(retvals); i++) {
bool fail;
if (is_a64(env)) {
fail = put_user_u64(retvals[i], arg0 + i * 8);
} else {
fail = put_user_u32(retvals[i], arg0 + i * 4);
}
if (fail) {
/* Couldn't write back to argument block */
return -1;
}
}
return 0;
}
case TARGET_SYS_EXIT: