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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
27 | */ |
| 28 | 28 | ||
| 29 | #include <libc.h> |
29 | #include <libc.h> |
| 30 | 30 | ||
| - | 31 | /** |
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| - | 32 | * Immediate operand for break instruction. |
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| - | 33 | * Be carefull about the value as Ski simulator |
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| - | 34 | * is somewhat sensitive to its value. |
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| - | 35 | * |
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| - | 36 | * 0 will be confused with Ski breakpoint. |
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| - | 37 | * And higher values will be confused with SSC's. |
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| - | 38 | */ |
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| - | 39 | #define SYSCALL_IMM 1 |
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| - | 40 | ||
| 31 | sysarg_t __syscall(const syscall_t id, const sysarg_t p1, const sysarg_t p2, const sysarg_t p3) |
41 | sysarg_t __syscall(const syscall_t id, const sysarg_t p1, const sysarg_t p2, const sysarg_t p3) |
| 32 | { |
42 | { |
| 33 | sysarg_t ret; |
43 | sysarg_t ret; |
| 34 | 44 | ||
| 35 | __asm__ volatile ( |
45 | __asm__ volatile ( |
| 36 | "mov r14 = %1\n" |
46 | "mov r14 = %1\n" |
| 37 | "mov r15 = %2\n" |
47 | "mov r15 = %2\n" |
| 38 | "mov r16 = %3\n" |
48 | "mov r16 = %3\n" |
| 39 | "mov r17 = %4\n" |
49 | "mov r17 = %4\n" |
| 40 | "break 0\n" |
50 | "break %5\n" |
| 41 | "mov %0 = r8\n" |
51 | "mov %0 = r8\n" |
| 42 | : "=r" (ret) |
52 | : "=r" (ret) |
| 43 | : "r" (id), "r" (p1), "r" (p2), "r" (p3) |
53 | : "r" (id), "r" (p1), "r" (p2), "r" (p3), "i" (SYSCALL_IMM) |
| 44 | : "r8", "r14", "r15", "r16" |
54 | : "r8", "r14", "r15", "r16" |
| 45 | ); |
55 | ); |
| 46 | 56 | ||
| 47 | return ret; |
57 | return ret; |
| 48 | } |
58 | } |