diff options
Diffstat (limited to 'gdb/d30v-tdep.c')
| -rw-r--r-- | gdb/d30v-tdep.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/gdb/d30v-tdep.c b/gdb/d30v-tdep.c index 09cd9e3..92cf24d 100644 --- a/gdb/d30v-tdep.c +++ b/gdb/d30v-tdep.c @@ -63,6 +63,7 @@ static void print_flags_command PARAMS ((char *, int)); #define OP_ADD_SP_IMM 0x080bffc0 /* add sp,sp,imm */ #define OP_ADD_R22_SP_IMM 0x08096fc0 /* add r22,sp,imm */ #define OP_STW_FP_SP_IMM 0x054bdfc0 /* stw fp,@(sp,imm) */ +#define OP_OR_SP_R0_IMM 0x03abf000 /* or sp,r0,imm */ /* no mask */ #define OP_OR_FP_R0_SP 0x03a3d03f /* or fp,r0,sp */ @@ -293,6 +294,8 @@ d30v_skip_prologue (pc) return pc; } +static int end_of_stack; + /* Given a GDB frame, determine the address of the calling function's frame. This will be used to create a new GDB frame struct, and then INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame. @@ -306,6 +309,9 @@ d30v_frame_chain (frame) d30v_frame_find_saved_regs (frame, &fsr); + if (end_of_stack) + return (CORE_ADDR)0; + if (frame->return_pc == IMEM_START) return (CORE_ADDR)0; @@ -463,6 +469,13 @@ prologue_find_regs (op, fsr, addr) return 1; } + /* stw fp,@(sp,imm) -- observed */ + if ((op & OP_MASK_ALL_BUT_IMM) == OP_STW_FP_SP_IMM) + { + offset = EXTRACT_IMM6(op); + fsr->regs[FP_REGNUM] = (offset - frame_size); + return 1; + } return 0; } @@ -486,6 +499,7 @@ d30v_frame_find_saved_regs (fi, fsr) memset (fsr, 0, sizeof (*fsr)); next_addr = 0; frame_size = 0; + end_of_stack = 0; pc = get_pc_function_start (fi->pc); @@ -531,6 +545,10 @@ d30v_frame_find_saved_regs (fi, fsr) fsr->regs[n] = (offset - frame_size); fsr->regs[n+1] = (offset - frame_size) + 4; } + else if ((opl & OP_MASK_ALL_BUT_IMM) == OP_OR_SP_R0_IMM) + { + end_of_stack = 1; + } else break; } @@ -554,10 +572,11 @@ d30v_frame_find_saved_regs (fi, fsr) } fi->size = frame_size; - if (!fp || !uses_frame) #if 0 - fp = read_register(SP_REGNUM) | DMEM_START; + if (!fp || !uses_frame) + fp = read_register(SP_REGNUM); #else + if (!fp) fp = read_register(SP_REGNUM); #endif for (i=0; i<NUM_REGS-1; i++) |