diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2016-07-04 13:06:35 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2016-07-04 13:06:35 +0100 |
| commit | f5666418c449b49917ea24cdb0bed76a602a3c74 (patch) | |
| tree | a26c728db9e1b08f9a4436f6f5d33341173a158b | |
| parent | d317091d5ed616328ef5a7b8502167c4e7de8e6b (diff) | |
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
| -rw-r--r-- | target-arm/arm-semi.c | 47 |
1 files changed, 26 insertions, 21 deletions
diff --git a/target-arm/arm-semi.c b/target-arm/arm-semi.c index 8be0645eb0..d50726f65d 100644 --- a/target-arm/arm-semi.c +++ b/target-arm/arm-semi.c @@ -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: |