diff options
Diffstat (limited to 'gdb/m88k-tdep.c')
| -rw-r--r-- | gdb/m88k-tdep.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/gdb/m88k-tdep.c b/gdb/m88k-tdep.c index 6d0ca84..65e39f6 100644 --- a/gdb/m88k-tdep.c +++ b/gdb/m88k-tdep.c @@ -152,6 +152,8 @@ init_frame_pc (fromleaf, prev) (addu r30,r31,n)? # frame pointer update (pic sequence)? # PIC code prologue + + (or rn,rm,0)? # Move parameters to other regs */ /* Macros for extracting fields from instructions. */ @@ -333,6 +335,32 @@ examine_prologue (ip, limit, frame_sp, fsr, fi) next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2); } + /* Accept moves of parameter registers to other registers, using + "or rd,rs,0" or "or.u rd,rs,0" or "or rd,r0,rs" or "or rd,rs,r0". + We don't have to worry about walking into the first lines of code, + since the first line number will stop us (assuming we have symbols). + What gcc actually seems to produce is "or rd,r0,rs". */ + +#define OR_MOVE_INSN 0x58000000 /* or/or.u with immed of 0 */ +#define OR_MOVE_MASK 0xF800FFFF +#define OR_REG_MOVE1_INSN 0xF4005800 /* or rd,r0,rs */ +#define OR_REG_MOVE1_MASK 0xFC1FFFE0 +#define OR_REG_MOVE2_INSN 0xF4005800 /* or rd,rs,r0 */ +#define OR_REG_MOVE2_MASK 0xFC00FFFF + while (next_ip && + ((insn1 & OR_MOVE_MASK) == OR_MOVE_INSN || + (insn1 & OR_REG_MOVE1_MASK) == OR_REG_MOVE1_INSN || + (insn1 & OR_REG_MOVE2_MASK) == OR_REG_MOVE2_INSN + ) + ) + { + /* We don't care what moves to where. The result of the moves + has already been reflected in what the compiler tells us is the + location of these parameters. */ + ip = next_ip; + next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2); + } + /* We're done with the prologue. If we don't care about the stack frame itself, just return. (Note that fsr->regs has been trashed, but the one caller who calls with fi==0 passes a dummy there.) */ |