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target/arm/arm-semi: Capture errno in softmmu version of set_swi_errno()

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The set_swi_errno() function is called to capture the errno
from a host system call, so that we can return -1 from the
semihosting function and later allow the guest to get a more
specific error code with the SYS_ERRNO function. It comes in
two versions, one for user-only and one for softmmu. We forgot
to capture the errno in the softmmu version; fix the error.

(Semihosting calls directed to gdb are unaffected because
they go through a different code path that captures the
error return from the gdbstub call in arm_semi_cb() or
arm_semi_flen_cb().)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190916141544.17540-2-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2019-09-16 15:15:30 +01:00
parent 88e4bd672e
commit 1b003821d4
1 changed files with 5 additions and 4 deletions
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9
target/arm/arm-semi.c
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@ -114,8 +114,13 @@ static inline uint32_t set_swi_errno(TaskState *ts, uint32_t code)
return code;
}
#else
static target_ulong syscall_err;
static inline uint32_t set_swi_errno(CPUARMState *env, uint32_t code)
{
if (code == (uint32_t)-1) {
syscall_err = errno;
}
return code;
}
@ -124,10 +129,6 @@ static inline uint32_t set_swi_errno(CPUARMState *env, uint32_t code)
static target_ulong arm_semi_syscall_len;
#if !defined(CONFIG_USER_ONLY)
static target_ulong syscall_err;
#endif
static void arm_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
{
ARMCPU *cpu = ARM_CPU(cs);