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/*
* linux-user semihosting checks
*
* Copyright (c) 2019
* Written by Alex Bennée <alex.bennee@linaro.org>
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#include <stdint.h>
#define SYS_WRITE0 0x04
#define SYS_REPORTEXC 0x18
void __semi_call(uintptr_t type, uintptr_t arg0)
{
#if defined(__arm__)
register uintptr_t t asm("r0") = type;
register uintptr_t a0 asm("r1") = arg0;
asm("svc 0xab"
: /* no return */
: "r" (t), "r" (a0));
#else
register uintptr_t t asm("x0") = type;
register uintptr_t a0 asm("x1") = arg0;
asm("hlt 0xf000"
: /* no return */
: "r" (t), "r" (a0));
#endif
}
int main(int argc, char *argv[argc])
{
#if defined(__arm__)
uintptr_t exit_code = 0x20026;
#else
uintptr_t exit_block[2] = {0x20026, 0};
uintptr_t exit_code = (uintptr_t) &exit_block;
#endif
__semi_call(SYS_WRITE0, (uintptr_t) "Hello World");
__semi_call(SYS_REPORTEXC, exit_code);
/* if we get here we failed */
return -1;
}
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