projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 6499767c | 1 | /* align.c 1.2 90/12/04 */ |
| 3a3c3fa2 | 2 | |
| 6499767c | 3 | #include "align.h" |
| 3a3c3fa2 SL |
4 | |
| 5 | /* | |
| 6 | * Part of the parameter list is set up by locore.s. | |
| 7 | * First 2 dummy variables MUST BE the first local | |
| 8 | * variables; leaving place for registers 0 and 1 | |
| 9 | * which are not preserved by the current C compiler. | |
| 10 | * Then, the array of structures and the last_operand | |
| 11 | * HAVE to be in the given order, to correspond to the | |
| 12 | * description of process_info in 'alignment.h'. | |
| 13 | */ | |
| 14 | alignment() | |
| 15 | { | |
| 16 | long space_4_Register_1; /* register 1 */ | |
| 17 | long space_4_Register_0; /* register 0 */ | |
| 18 | struct oprnd space_4_decoded[4]; | |
| 19 | long space_4_opcode; | |
| 20 | long space_4_last_operand; /* Last operand # processed */ | |
| 21 | long space_4_saved_pc; | |
| 22 | long space_4_saved_sp; | |
| 23 | ||
| 24 | register process_info *infop; | |
| 25 | ||
| 26 | infop = (process_info *)&space_4_saved_sp; | |
| 27 | saved_pc = pc; | |
| 28 | saved_sp = sp; /* For possible exceptions */ | |
| 29 | ||
| 30 | last_operand = -1; /* To get the operand routine going correctly */ | |
| 31 | ||
| 32 | opCODE = 0xff & *(char *)pc; | |
| 33 | pc++; | |
| 34 | (*Table[opCODE].routine) (infop); /* Call relevant handler */ | |
| 35 | /* | |
| 36 | * NOTE: nothing should follow, except the return. | |
| 37 | * The register variables cannot be trusted anymore, | |
| 38 | * if an exception is signalled. See 'exception.c' | |
| 39 | * to understand why. | |
| 40 | */ | |
| 41 | } |