X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=gdb%2Fv850-tdep.c;h=851ba079414d7d44ac0dbfc589b347ca576df232;hb=1e6982353631fce67c8b11e8f286395265caac49;hp=5f71b5e19d61fea3a648571c07f3ef182089073d;hpb=72ec28b8afa357cdde70c612b4e0e9f37a34f8e4;p=binutils-gdb.git diff --git a/gdb/v850-tdep.c b/gdb/v850-tdep.c index 5f71b5e19d6..851ba079414 100644 --- a/gdb/v850-tdep.c +++ b/gdb/v850-tdep.c @@ -1,5 +1,6 @@ /* Target-dependent code for the NEC V850 for GDB, the GNU debugger. - Copyright 1996, Free Software Foundation, Inc. + Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003 + Free Software Foundation, Inc. This file is part of GDB. @@ -21,16 +22,126 @@ #include "defs.h" #include "frame.h" #include "inferior.h" -#include "obstack.h" #include "target.h" #include "value.h" #include "bfd.h" #include "gdb_string.h" #include "gdbcore.h" #include "symfile.h" +#include "arch-utils.h" +#include "regcache.h" +#include "symtab.h" +struct gdbarch_tdep +{ + /* gdbarch target dependent data here. Currently unused for v850. */ +}; + +/* Extra info which is saved in each frame_info. */ +struct frame_extra_info +{ +}; + +enum { + E_R0_REGNUM, + E_R1_REGNUM, + E_R2_REGNUM, E_SAVE1_START_REGNUM = E_R2_REGNUM, E_SAVE1_END_REGNUM = E_R2_REGNUM, + E_R3_REGNUM, E_SP_REGNUM = E_R3_REGNUM, + E_R4_REGNUM, + E_R5_REGNUM, + E_R6_REGNUM, E_ARG0_REGNUM = E_R6_REGNUM, + E_R7_REGNUM, + E_R8_REGNUM, + E_R9_REGNUM, E_ARGLAST_REGNUM = E_R9_REGNUM, + E_R10_REGNUM, E_V0_REGNUM = E_R10_REGNUM, + E_R11_REGNUM, E_V1_REGNUM = E_R11_REGNUM, + E_R12_REGNUM, + E_R13_REGNUM, + E_R14_REGNUM, + E_R15_REGNUM, + E_R16_REGNUM, + E_R17_REGNUM, + E_R18_REGNUM, + E_R19_REGNUM, + E_R20_REGNUM, E_SAVE2_START_REGNUM = E_R20_REGNUM, + E_R21_REGNUM, + E_R22_REGNUM, + E_R23_REGNUM, + E_R24_REGNUM, + E_R25_REGNUM, + E_R26_REGNUM, + E_R27_REGNUM, + E_R28_REGNUM, + E_R29_REGNUM, E_SAVE2_END_REGNUM = E_R29_REGNUM, E_FP_RAW_REGNUM = E_R29_REGNUM, + E_R30_REGNUM, E_EP_REGNUM = E_R30_REGNUM, + E_R31_REGNUM, E_SAVE3_START_REGNUM = E_R31_REGNUM, E_SAVE3_END_REGNUM = E_R31_REGNUM, E_RP_REGNUM = E_R31_REGNUM, + E_R32_REGNUM, E_SR0_REGNUM = E_R32_REGNUM, + E_R33_REGNUM, + E_R34_REGNUM, + E_R35_REGNUM, + E_R36_REGNUM, + E_R37_REGNUM, E_PS_REGNUM = E_R37_REGNUM, + E_R38_REGNUM, + E_R39_REGNUM, + E_R40_REGNUM, + E_R41_REGNUM, + E_R42_REGNUM, + E_R43_REGNUM, + E_R44_REGNUM, + E_R45_REGNUM, + E_R46_REGNUM, + E_R47_REGNUM, + E_R48_REGNUM, + E_R49_REGNUM, + E_R50_REGNUM, + E_R51_REGNUM, + E_R52_REGNUM, E_CTBP_REGNUM = E_R52_REGNUM, + E_R53_REGNUM, + E_R54_REGNUM, + E_R55_REGNUM, + E_R56_REGNUM, + E_R57_REGNUM, + E_R58_REGNUM, + E_R59_REGNUM, + E_R60_REGNUM, + E_R61_REGNUM, + E_R62_REGNUM, + E_R63_REGNUM, + E_R64_REGNUM, E_PC_REGNUM = E_R64_REGNUM, + E_R65_REGNUM, E_FP_REGNUM = E_R65_REGNUM, + E_NUM_REGS +}; + +enum +{ + v850_reg_size = 4 +}; + +/* Size of all registers as a whole. */ +enum +{ + E_ALL_REGS_SIZE = (E_NUM_REGS) * v850_reg_size +}; + +/* Size of return datatype which fits into all return registers. */ +enum +{ + E_MAX_RETTYPE_SIZE_IN_REGS = 2 * v850_reg_size +}; + +static LONGEST call_dummy_nil[] = {0}; -static char *v850_generic_reg_names[] = REGISTER_NAMES; +static char *v850_generic_reg_names[] = +{ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", + "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", + "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", + "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", + "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7", + "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15", + "sr16", "sr17", "sr18", "sr19", "sr20", "sr21", "sr22", "sr23", + "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31", + "pc", "fp" +}; static char *v850e_reg_names[] = { @@ -62,10 +173,6 @@ v850_processor_type_table[] = v850e_reg_names, bfd_mach_v850e } , - { - v850e_reg_names, bfd_mach_v850ea - } - , { NULL, 0 } @@ -89,17 +196,162 @@ struct prologue_info struct pifsr *pifsrs; }; -static CORE_ADDR v850_scan_prologue PARAMS ((CORE_ADDR pc, - struct prologue_info * fs)); +static CORE_ADDR v850_scan_prologue (CORE_ADDR pc, struct prologue_info *fs); + +/* Function: v850_register_name + Returns the name of the v850/v850e register N. */ + +static const char * +v850_register_name (int regnum) +{ + if (regnum < 0 || regnum >= E_NUM_REGS) + internal_error (__FILE__, __LINE__, + "v850_register_name: illegal register number %d", + regnum); + else + return v850_register_names[regnum]; + +} + +/* Function: v850_register_byte + Returns the byte position in the register cache for register N. */ + +static int +v850_register_byte (int regnum) +{ + if (regnum < 0 || regnum >= E_NUM_REGS) + internal_error (__FILE__, __LINE__, + "v850_register_byte: illegal register number %d", + regnum); + else + return regnum * v850_reg_size; +} + +/* Function: v850_register_raw_size + Returns the number of bytes occupied by the register on the target. */ + +static int +v850_register_raw_size (int regnum) +{ + if (regnum < 0 || regnum >= E_NUM_REGS) + internal_error (__FILE__, __LINE__, + "v850_register_raw_size: illegal register number %d", + regnum); + /* Only the PC has 4 Byte, all other registers 2 Byte. */ + else + return v850_reg_size; +} + +/* Function: v850_register_virtual_size + Returns the number of bytes occupied by the register as represented + internally by gdb. */ + +static int +v850_register_virtual_size (int regnum) +{ + return v850_register_raw_size (regnum); +} + +/* Function: v850_reg_virtual_type + Returns the default type for register N. */ +static struct type * +v850_reg_virtual_type (int regnum) +{ + if (regnum < 0 || regnum >= E_NUM_REGS) + internal_error (__FILE__, __LINE__, + "v850_register_virtual_type: illegal register number %d", + regnum); + else if (regnum == E_PC_REGNUM) + return builtin_type_uint32; + else + return builtin_type_int32; +} + +static int +v850_type_is_scalar (struct type *t) +{ + return (TYPE_CODE (t) != TYPE_CODE_STRUCT + && TYPE_CODE (t) != TYPE_CODE_UNION + && TYPE_CODE (t) != TYPE_CODE_ARRAY); +} /* Should call_function allocate stack space for a struct return? */ -int -v850_use_struct_convention (gcc_p, type) - int gcc_p; - struct type *type; +static int +v850_use_struct_convention (int gcc_p, struct type *type) { - return (TYPE_NFIELDS (type) > 1 || TYPE_LENGTH (type) > 4); + /* According to ABI: + * return TYPE_LENGTH (type) > 8); + */ + + /* Current implementation in gcc: */ + + int i; + struct type *fld_type, *tgt_type; + + /* 1. The value is greater than 8 bytes -> returned by copying */ + if (TYPE_LENGTH (type) > 8) + return 1; + + /* 2. The value is a single basic type -> returned in register */ + if (v850_type_is_scalar (type)) + return 0; + + /* The value is a structure or union with a single element + * and that element is either a single basic type or an array of + * a single basic type whoes size is greater than or equal to 4 + * -> returned in register */ + if ((TYPE_CODE (type) == TYPE_CODE_STRUCT + || TYPE_CODE (type) == TYPE_CODE_UNION) + && TYPE_NFIELDS (type) == 1) + { + fld_type = TYPE_FIELD_TYPE (type, 0); + if (v850_type_is_scalar (fld_type) && TYPE_LENGTH (fld_type) >= 4) + return 0; + + if (TYPE_CODE (fld_type) == TYPE_CODE_ARRAY) + { + tgt_type = TYPE_TARGET_TYPE (fld_type); + if (v850_type_is_scalar (tgt_type) && TYPE_LENGTH (tgt_type) >= 4) + return 0; + } + } + + /* The value is a structure whose first element is an integer or + * a float, and which contains no arrays of more than two elements + * -> returned in register */ + if (TYPE_CODE (type) == TYPE_CODE_STRUCT + && v850_type_is_scalar (TYPE_FIELD_TYPE (type, 0)) + && TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0)) == 4) + { + for (i = 1; i < TYPE_NFIELDS (type); ++i) + { + fld_type = TYPE_FIELD_TYPE (type, 0); + if (TYPE_CODE (fld_type) == TYPE_CODE_ARRAY) + { + tgt_type = TYPE_TARGET_TYPE (fld_type); + if (TYPE_LENGTH (fld_type) >= 0 && TYPE_LENGTH (tgt_type) >= 0 + && TYPE_LENGTH (fld_type) / TYPE_LENGTH (tgt_type) > 2) + return 1; + } + } + return 0; + } + + /* The value is a union which contains at least one field which + * would be returned in registers according to these rules + * -> returned in register */ + if (TYPE_CODE (type) == TYPE_CODE_UNION) + { + for (i = 0; i < TYPE_NFIELDS (type); ++i) + { + fld_type = TYPE_FIELD_TYPE (type, 0); + if (!v850_use_struct_convention (0, fld_type)) + return 0; + } + } + + return 1; } @@ -116,7 +368,6 @@ struct reg_list static void handle_prepare (int insn, int insn2, CORE_ADDR * current_pc_ptr, struct prologue_info *pi, struct pifsr **pifsr_ptr) - { CORE_ADDR current_pc = *current_pc_ptr; struct pifsr *pifsr = *pifsr_ptr; @@ -152,7 +403,7 @@ handle_prepare (int insn, int insn2, CORE_ADDR * current_pc_ptr, it to the immediate value used to adjust SP. */ for (i = 0; reg_table[i].mask != 0; i++) if (list12 & reg_table[i].mask) - offset += REGISTER_RAW_SIZE (regtable[i].regno); + offset += v850_register_raw_size (reg_table[i].regno); pi->frameoffset -= offset; /* Calculate the offsets of the registers relative to the value @@ -165,7 +416,7 @@ handle_prepare (int insn, int insn2, CORE_ADDR * current_pc_ptr, if (list12 & reg_table[i].mask) { int reg = reg_table[i].regno; - offset -= REGISTER_RAW_SIZE (reg); + offset -= v850_register_raw_size (reg); pifsr->reg = reg; pifsr->offset = offset; pifsr->cur_frameoffset = pi->frameoffset; @@ -193,14 +444,13 @@ handle_prepare (int insn, int insn2, CORE_ADDR * current_pc_ptr, static void handle_pushm (int insn, int insn2, struct prologue_info *pi, struct pifsr **pifsr_ptr) - { struct pifsr *pifsr = *pifsr_ptr; long list12 = ((insn & 0x0f) << 16) + (insn2 & 0xfff0); long offset = 0; static struct reg_list pushml_reg_table[] = { - {0x80000, PS_REGNUM}, /* PSW */ + {0x80000, E_PS_REGNUM}, /* PSW */ {0x40000, 1}, /* r1 */ {0x20000, 2}, /* r2 */ {0x10000, 3}, /* r3 */ @@ -251,7 +501,7 @@ handle_pushm (int insn, int insn2, struct prologue_info *pi, it to the immediate value used to adjust SP. */ for (i = 0; reg_table[i].mask != 0; i++) if (list12 & reg_table[i].mask) - offset += REGISTER_RAW_SIZE (regtable[i].regno); + offset += v850_register_raw_size (reg_table[i].regno); pi->frameoffset -= offset; /* Calculate the offsets of the registers relative to the value @@ -264,7 +514,7 @@ handle_pushm (int insn, int insn2, struct prologue_info *pi, if (list12 & reg_table[i].mask) { int reg = reg_table[i].regno; - offset -= REGISTER_RAW_SIZE (reg); + offset -= v850_register_raw_size (reg); pifsr->reg = reg; pifsr->offset = offset; pifsr->cur_frameoffset = pi->frameoffset; @@ -288,17 +538,15 @@ handle_pushm (int insn, int insn2, struct prologue_info *pi, /* Function: scan_prologue Scan the prologue of the function that contains PC, and record what - we find in PI. PI->fsr must be zeroed by the called. Returns the - pc after the prologue. Note that the addresses saved in pi->fsr - are actually just frame relative (negative offsets from the frame - pointer). This is because we don't know the actual value of the - frame pointer yet. In some circumstances, the frame pointer can't - be determined till after we have scanned the prologue. */ + we find in PI. Returns the pc after the prologue. Note that the + addresses saved in frame->saved_regs are just frame relative (negative + offsets from the frame pointer). This is because we don't know the + actual value of the frame pointer yet. In some circumstances, the + frame pointer can't be determined till after we have scanned the + prologue. */ static CORE_ADDR -v850_scan_prologue (pc, pi) - CORE_ADDR pc; - struct prologue_info *pi; +v850_scan_prologue (CORE_ADDR pc, struct prologue_info *pi) { CORE_ADDR func_addr, prologue_end, current_pc; struct pifsr *pifsr, *pifsr_tmp; @@ -345,7 +593,7 @@ v850_scan_prologue (pc, pi) registers. */ pi->frameoffset = 0; - pi->framereg = SP_REGNUM; + pi->framereg = E_SP_REGNUM; fp_used = 0; ep_used = 0; pifsr = pi->pifsrs; @@ -361,11 +609,12 @@ v850_scan_prologue (pc, pi) for (current_pc = func_addr; current_pc < prologue_end;) { - int insn, insn2; + int insn; + int insn2 = -1; /* dummy value */ #ifdef DEBUG printf_filtered ("0x%.8lx ", (long) current_pc); - (*tm_print_insn) (current_pc, &tm_print_insn_info); + TARGET_PRINT_INSN (current_pc, &tm_print_insn_info); #endif insn = read_memory_unsigned_integer (current_pc, 2); @@ -401,7 +650,7 @@ v850_scan_prologue (pc, pi) } else if ((insn & 0xffc0) == 0x0200 && !regsave_func_p) { /* callt */ - long ctbp = read_register (CTBP_REGNUM); + long ctbp = read_register (E_CTBP_REGNUM); long adr = ctbp + ((insn & 0x3f) << 1); save_pc = current_pc; @@ -459,33 +708,33 @@ v850_scan_prologue (pc, pi) break; /* Ran into end of prologue */ } - else if ((insn & 0xffe0) == ((SP_REGNUM << 11) | 0x0240)) /* add ,sp */ + else if ((insn & 0xffe0) == ((E_SP_REGNUM << 11) | 0x0240)) /* add ,sp */ pi->frameoffset += ((insn & 0x1f) ^ 0x10) - 0x10; - else if (insn == ((SP_REGNUM << 11) | 0x0600 | SP_REGNUM)) /* addi ,sp,sp */ + else if (insn == ((E_SP_REGNUM << 11) | 0x0600 | E_SP_REGNUM)) /* addi ,sp,sp */ pi->frameoffset += insn2; - else if (insn == ((FP_RAW_REGNUM << 11) | 0x0000 | SP_REGNUM)) /* mov sp,fp */ + else if (insn == ((E_FP_RAW_REGNUM << 11) | 0x0000 | E_SP_REGNUM)) /* mov sp,fp */ { fp_used = 1; - pi->framereg = FP_RAW_REGNUM; + pi->framereg = E_FP_RAW_REGNUM; } - else if (insn == ((R12_REGNUM << 11) | 0x0640 | R0_REGNUM)) /* movhi hi(const),r0,r12 */ + else if (insn == ((E_R12_REGNUM << 11) | 0x0640 | E_R0_REGNUM)) /* movhi hi(const),r0,r12 */ r12_tmp = insn2 << 16; - else if (insn == ((R12_REGNUM << 11) | 0x0620 | R12_REGNUM)) /* movea lo(const),r12,r12 */ + else if (insn == ((E_R12_REGNUM << 11) | 0x0620 | E_R12_REGNUM)) /* movea lo(const),r12,r12 */ r12_tmp += insn2; - else if (insn == ((SP_REGNUM << 11) | 0x01c0 | R12_REGNUM) && r12_tmp) /* add r12,sp */ + else if (insn == ((E_SP_REGNUM << 11) | 0x01c0 | E_R12_REGNUM) && r12_tmp) /* add r12,sp */ pi->frameoffset = r12_tmp; - else if (insn == ((EP_REGNUM << 11) | 0x0000 | SP_REGNUM)) /* mov sp,ep */ + else if (insn == ((E_EP_REGNUM << 11) | 0x0000 | E_SP_REGNUM)) /* mov sp,ep */ ep_used = 1; - else if (insn == ((EP_REGNUM << 11) | 0x0000 | R1_REGNUM)) /* mov r1,ep */ + else if (insn == ((E_EP_REGNUM << 11) | 0x0000 | E_R1_REGNUM)) /* mov r1,ep */ ep_used = 0; - else if (((insn & 0x07ff) == (0x0760 | SP_REGNUM) /* st.w ,[sp] */ + else if (((insn & 0x07ff) == (0x0760 | E_SP_REGNUM) /* st.w ,[sp] */ || (fp_used - && (insn & 0x07ff) == (0x0760 | FP_RAW_REGNUM))) /* st.w ,[fp] */ + && (insn & 0x07ff) == (0x0760 | E_FP_RAW_REGNUM))) /* st.w ,[fp] */ && pifsr - && (((reg = (insn >> 11) & 0x1f) >= SAVE1_START_REGNUM && reg <= SAVE1_END_REGNUM) - || (reg >= SAVE2_START_REGNUM && reg <= SAVE2_END_REGNUM) - || (reg >= SAVE3_START_REGNUM && reg <= SAVE3_END_REGNUM))) + && (((reg = (insn >> 11) & 0x1f) >= E_SAVE1_START_REGNUM && reg <= E_SAVE1_END_REGNUM) + || (reg >= E_SAVE2_START_REGNUM && reg <= E_SAVE2_END_REGNUM) + || (reg >= E_SAVE3_START_REGNUM && reg <= E_SAVE3_END_REGNUM))) { pifsr->reg = reg; pifsr->offset = insn2 & ~1; @@ -499,9 +748,9 @@ v850_scan_prologue (pc, pi) else if (ep_used /* sst.w ,[ep] */ && ((insn & 0x0781) == 0x0501) && pifsr - && (((reg = (insn >> 11) & 0x1f) >= SAVE1_START_REGNUM && reg <= SAVE1_END_REGNUM) - || (reg >= SAVE2_START_REGNUM && reg <= SAVE2_END_REGNUM) - || (reg >= SAVE3_START_REGNUM && reg <= SAVE3_END_REGNUM))) + && (((reg = (insn >> 11) & 0x1f) >= E_SAVE1_START_REGNUM && reg <= E_SAVE1_END_REGNUM) + || (reg >= E_SAVE2_START_REGNUM && reg <= E_SAVE2_END_REGNUM) + || (reg >= E_SAVE3_START_REGNUM && reg <= E_SAVE3_END_REGNUM))) { pifsr->reg = reg; pifsr->offset = (insn & 0x007e) << 1; @@ -540,50 +789,25 @@ v850_scan_prologue (pc, pi) return current_pc; } -/* Function: init_extra_frame_info - Setup the frame's frame pointer, pc, and frame addresses for saved - registers. Most of the work is done in scan_prologue(). - - Note that when we are called for the last frame (currently active frame), - that fi->pc and fi->frame will already be setup. However, fi->frame will - be valid only if this routine uses FP. For previous frames, fi-frame will - always be correct (since that is derived from v850_frame_chain ()). - - We can be called with the PC in the call dummy under two circumstances. - First, during normal backtracing, second, while figuring out the frame - pointer just prior to calling the target function (see run_stack_dummy). */ +/* Function: find_callers_reg + Find REGNUM on the stack. Otherwise, it's in an active register. + One thing we might want to do here is to check REGNUM against the + clobber mask, and somehow flag it as invalid if it isn't saved on + the stack somewhere. This would provide a graceful failure mode + when trying to get the value of caller-saves registers for an inner + frame. */ -void -v850_init_extra_frame_info (fi) - struct frame_info *fi; +CORE_ADDR +v850_find_callers_reg (struct frame_info *fi, int regnum) { - struct prologue_info pi; - struct pifsr pifsrs[NUM_REGS + 1], *pifsr; - - if (fi->next) - fi->pc = FRAME_SAVED_PC (fi->next); - - memset (fi->fsr.regs, '\000', sizeof fi->fsr.regs); - - /* The call dummy doesn't save any registers on the stack, so we can return - now. */ - if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) - return; - - pi.pifsrs = pifsrs; - - v850_scan_prologue (fi->pc, &pi); - - if (!fi->next && pi.framereg == SP_REGNUM) - fi->frame = read_register (pi.framereg) - pi.frameoffset; - - for (pifsr = pifsrs; pifsr->framereg; pifsr++) - { - fi->fsr.regs[pifsr->reg] = pifsr->offset + fi->frame; + for (; fi; fi = fi->next) + if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), fi->frame, fi->frame)) + return deprecated_read_register_dummy (get_frame_pc (fi), fi->frame, regnum); + else if (get_frame_saved_regs (fi)[regnum] != 0) + return read_memory_unsigned_integer (get_frame_saved_regs (fi)[regnum], + v850_register_raw_size (regnum)); - if (pifsr->framereg == SP_REGNUM) - fi->fsr.regs[pifsr->reg] += pi.frameoffset; - } + return read_register (regnum); } /* Function: frame_chain @@ -594,8 +818,7 @@ v850_init_extra_frame_info (fi) function call was made. */ CORE_ADDR -v850_frame_chain (fi) - struct frame_info *fi; +v850_frame_chain (struct frame_info *fi) { struct prologue_info pi; CORE_ADDR callers_pc, fp; @@ -603,8 +826,8 @@ v850_frame_chain (fi) /* First, find out who called us */ callers_pc = FRAME_SAVED_PC (fi); /* If caller is a call-dummy, then our FP bears no relation to his FP! */ - fp = v850_find_callers_reg (fi, FP_RAW_REGNUM); - if (PC_IN_CALL_DUMMY (callers_pc, fp, fp)) + fp = v850_find_callers_reg (fi, E_FP_RAW_REGNUM); + if (DEPRECATED_PC_IN_CALL_DUMMY (callers_pc, fp, fp)) return fp; /* caller is call-dummy: return oldest value of FP */ /* Caller is NOT a call-dummy, so everything else should just work. @@ -616,41 +839,17 @@ v850_frame_chain (fi) if (pi.start_function) return 0; /* Don't chain beyond the start function */ - if (pi.framereg == FP_RAW_REGNUM) + if (pi.framereg == E_FP_RAW_REGNUM) return v850_find_callers_reg (fi, pi.framereg); return fi->frame - pi.frameoffset; } -/* Function: find_callers_reg - Find REGNUM on the stack. Otherwise, it's in an active register. - One thing we might want to do here is to check REGNUM against the - clobber mask, and somehow flag it as invalid if it isn't saved on - the stack somewhere. This would provide a graceful failure mode - when trying to get the value of caller-saves registers for an inner - frame. */ - -CORE_ADDR -v850_find_callers_reg (fi, regnum) - struct frame_info *fi; - int regnum; -{ - for (; fi; fi = fi->next) - if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) - return generic_read_register_dummy (fi->pc, fi->frame, regnum); - else if (fi->fsr.regs[regnum] != 0) - return read_memory_unsigned_integer (fi->fsr.regs[regnum], - REGISTER_RAW_SIZE (regnum)); - - return read_register (regnum); -} - /* Function: skip_prologue Return the address of the first code past the prologue of the function. */ CORE_ADDR -v850_skip_prologue (pc) - CORE_ADDR pc; +v850_skip_prologue (CORE_ADDR pc) { CORE_ADDR func_addr, func_end; @@ -680,24 +879,24 @@ v850_skip_prologue (pc) command, or the call dummy breakpoint gets hit. */ void -v850_pop_frame (frame) - struct frame_info *frame; +v850_pop_frame (void) { + struct frame_info *frame = get_current_frame (); int regnum; - if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) + if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (frame), frame->frame, frame->frame)) generic_pop_dummy_frame (); else { - write_register (PC_REGNUM, FRAME_SAVED_PC (frame)); + write_register (E_PC_REGNUM, FRAME_SAVED_PC (frame)); - for (regnum = 0; regnum < NUM_REGS; regnum++) - if (frame->fsr.regs[regnum] != 0) + for (regnum = 0; regnum < E_NUM_REGS; regnum++) + if (get_frame_saved_regs (frame)[regnum] != 0) write_register (regnum, - read_memory_unsigned_integer (frame->fsr.regs[regnum], - REGISTER_RAW_SIZE (regnum))); + read_memory_unsigned_integer (get_frame_saved_regs (frame)[regnum], + v850_register_raw_size (regnum))); - write_register (SP_REGNUM, FRAME_FP (frame)); + write_register (E_SP_REGNUM, get_frame_base (frame)); } flush_cached_frames (); @@ -715,12 +914,8 @@ v850_pop_frame (frame) */ CORE_ADDR -v850_push_arguments (nargs, args, sp, struct_return, struct_addr) - int nargs; - value_ptr *args; - CORE_ADDR sp; - unsigned char struct_return; - CORE_ADDR struct_addr; +v850_push_arguments (int nargs, struct value **args, CORE_ADDR sp, + int struct_return, CORE_ADDR struct_addr) { int argreg; int argnum; @@ -730,22 +925,22 @@ v850_push_arguments (nargs, args, sp, struct_return, struct_addr) /* First, just for safety, make sure stack is aligned */ sp &= ~3; + /* The offset onto the stack at which we will start copying parameters + (after the registers are used up) begins at 16 rather than at zero. + I don't really know why, that's just the way it seems to work. */ + stack_offset = 16; + /* Now make space on the stack for the args. */ for (argnum = 0; argnum < nargs; argnum++) len += ((TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 3) & ~3); - sp -= len; /* possibly over-allocating, but it works... */ + sp -= len + stack_offset; /* possibly over-allocating, but it works... */ /* (you might think we could allocate 16 bytes */ /* less, but the ABI seems to use it all! ) */ - argreg = ARG0_REGNUM; + argreg = E_ARG0_REGNUM; /* the struct_return pointer occupies the first parameter-passing reg */ if (struct_return) - write_register (argreg++, struct_addr); - - stack_offset = 16; - /* The offset onto the stack at which we will start copying parameters - (after the registers are used up) begins at 16 rather than at zero. - I don't really know why, that's just the way it seems to work. */ + argreg++; /* Now load as many as possible of the first arguments into registers, and push the rest onto the stack. There are 16 bytes @@ -754,10 +949,10 @@ v850_push_arguments (nargs, args, sp, struct_return, struct_addr) { int len; char *val; - char valbuf[REGISTER_RAW_SIZE (ARG0_REGNUM)]; + char valbuf[v850_register_raw_size (E_ARG0_REGNUM)]; - if (TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_STRUCT - && TYPE_LENGTH (VALUE_TYPE (*args)) > 8) + if (!v850_type_is_scalar (VALUE_TYPE (*args)) + && TYPE_LENGTH (VALUE_TYPE (*args)) > E_MAX_RETTYPE_SIZE_IN_REGS) { store_address (valbuf, 4, VALUE_ADDRESS (*args)); len = 4; @@ -770,15 +965,15 @@ v850_push_arguments (nargs, args, sp, struct_return, struct_addr) } while (len > 0) - if (argreg <= ARGLAST_REGNUM) + if (argreg <= E_ARGLAST_REGNUM) { CORE_ADDR regval; - regval = extract_address (val, REGISTER_RAW_SIZE (argreg)); + regval = extract_address (val, v850_register_raw_size (argreg)); write_register (argreg, regval); - len -= REGISTER_RAW_SIZE (argreg); - val += REGISTER_RAW_SIZE (argreg); + len -= v850_register_raw_size (argreg); + val += v850_register_raw_size (argreg); argreg++; } else @@ -799,29 +994,26 @@ v850_push_arguments (nargs, args, sp, struct_return, struct_addr) Needed for targets where we don't actually execute a JSR/BSR instruction */ CORE_ADDR -v850_push_return_address (pc, sp) - CORE_ADDR pc; - CORE_ADDR sp; +v850_push_return_address (CORE_ADDR pc, CORE_ADDR sp) { - write_register (RP_REGNUM, CALL_DUMMY_ADDRESS ()); + write_register (E_RP_REGNUM, CALL_DUMMY_ADDRESS ()); return sp; } /* Function: frame_saved_pc - Find the caller of this frame. We do this by seeing if RP_REGNUM + Find the caller of this frame. We do this by seeing if E_RP_REGNUM is saved in the stack anywhere, otherwise we get it from the registers. If the inner frame is a dummy frame, return its PC instead of RP, because that's where "caller" of the dummy-frame will be found. */ CORE_ADDR -v850_frame_saved_pc (fi) - struct frame_info *fi; +v850_frame_saved_pc (struct frame_info *fi) { - if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) - return generic_read_register_dummy (fi->pc, fi->frame, PC_REGNUM); + if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), fi->frame, fi->frame)) + return deprecated_read_register_dummy (get_frame_pc (fi), fi->frame, E_PC_REGNUM); else - return v850_find_callers_reg (fi, RP_REGNUM); + return v850_find_callers_reg (fi, E_RP_REGNUM); } @@ -832,15 +1024,9 @@ v850_frame_saved_pc (fi) trap */ -int -v850_fix_call_dummy (dummy, sp, fun, nargs, args, type, gcc_p) - char *dummy; - CORE_ADDR sp; - CORE_ADDR fun; - int nargs; - value_ptr *args; - struct type *type; - int gcc_p; +void +v850_fix_call_dummy (char *dummy, CORE_ADDR sp, CORE_ADDR fun, int nargs, + struct value **args, struct type *type, int gcc_p) { long offset24; @@ -850,36 +1036,267 @@ v850_fix_call_dummy (dummy, sp, fun, nargs, args, type, gcc_p) store_unsigned_integer ((unsigned int *) &dummy[2], 2, offset24 & 0xffff); store_unsigned_integer ((unsigned int *) &dummy[0], 2, offset24 >> 16); - return 0; } -/* Change the register names based on the current machine type. */ +static CORE_ADDR +v850_saved_pc_after_call (struct frame_info *ignore) +{ + return read_register (E_RP_REGNUM); +} + +static void +v850_extract_return_value (struct type *type, char *regbuf, char *valbuf) +{ + CORE_ADDR return_buffer; -static int -v850_target_architecture_hook (ap) - const bfd_arch_info_type *ap; + if (!v850_use_struct_convention (0, type)) + { + /* Scalar return values of <= 8 bytes are returned in + E_V0_REGNUM to E_V1_REGNUM. */ + memcpy (valbuf, + ®buf[REGISTER_BYTE (E_V0_REGNUM)], + TYPE_LENGTH (type)); + } + else + { + /* Aggregates and return values > 8 bytes are returned in memory, + pointed to by R6. */ + return_buffer = + extract_address (regbuf + REGISTER_BYTE (E_V0_REGNUM), + REGISTER_RAW_SIZE (E_V0_REGNUM)); + + read_memory (return_buffer, valbuf, TYPE_LENGTH (type)); + } +} + +const static unsigned char * +v850_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) { - int i, j; + static unsigned char breakpoint[] = { 0x85, 0x05 }; + *lenptr = sizeof (breakpoint); + return breakpoint; +} + +static CORE_ADDR +v850_extract_struct_value_address (char *regbuf) +{ + return extract_address (regbuf + v850_register_byte (E_V0_REGNUM), + v850_register_raw_size (E_V0_REGNUM)); +} + +static void +v850_store_return_value (struct type *type, char *valbuf) +{ + CORE_ADDR return_buffer; - if (ap->arch != bfd_arch_v850) + if (!v850_use_struct_convention (0, type)) + deprecated_write_register_bytes (REGISTER_BYTE (E_V0_REGNUM), valbuf, + TYPE_LENGTH (type)); + else + { + return_buffer = read_register (E_V0_REGNUM); + write_memory (return_buffer, valbuf, TYPE_LENGTH (type)); + } +} + +static void +v850_frame_init_saved_regs (struct frame_info *fi) +{ + struct prologue_info pi; + struct pifsr pifsrs[E_NUM_REGS + 1], *pifsr; + CORE_ADDR func_addr, func_end; + + if (!get_frame_saved_regs (fi)) + { + frame_saved_regs_zalloc (fi); + + /* The call dummy doesn't save any registers on the stack, so we + can return now. */ + if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), fi->frame, fi->frame)) + return; + + /* Find the beginning of this function, so we can analyze its + prologue. */ + if (find_pc_partial_function (get_frame_pc (fi), NULL, &func_addr, &func_end)) + { + pi.pifsrs = pifsrs; + + v850_scan_prologue (get_frame_pc (fi), &pi); + + if (!fi->next && pi.framereg == E_SP_REGNUM) + deprecated_update_frame_base_hack (fi, read_register (pi.framereg) - pi.frameoffset); + + for (pifsr = pifsrs; pifsr->framereg; pifsr++) + { + get_frame_saved_regs (fi)[pifsr->reg] = pifsr->offset + fi->frame; + + if (pifsr->framereg == E_SP_REGNUM) + get_frame_saved_regs (fi)[pifsr->reg] += pi.frameoffset; + } + } + /* Else we're out of luck (can't debug completely stripped code). + FIXME. */ + } +} + +/* Function: init_extra_frame_info + Setup the frame's frame pointer, pc, and frame addresses for saved + registers. Most of the work is done in scan_prologue(). + + Note that when we are called for the last frame (currently active frame), + that get_frame_pc (fi) and fi->frame will already be setup. However, fi->frame will + be valid only if this routine uses FP. For previous frames, fi-frame will + always be correct (since that is derived from v850_frame_chain ()). + + We can be called with the PC in the call dummy under two circumstances. + First, during normal backtracing, second, while figuring out the frame + pointer just prior to calling the target function (see run_stack_dummy). */ + +static void +v850_init_extra_frame_info (int fromleaf, struct frame_info *fi) +{ + struct prologue_info pi; + + if (fi->next) + deprecated_update_frame_pc_hack (fi, FRAME_SAVED_PC (fi->next)); + + v850_frame_init_saved_regs (fi); +} + +static void +v850_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) +{ + write_register (E_ARG0_REGNUM, addr); +} + +static CORE_ADDR +v850_target_read_fp (void) +{ + return read_register (E_FP_RAW_REGNUM); +} + +static struct gdbarch * +v850_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) +{ + static LONGEST call_dummy_words[1] = { 0 }; + struct gdbarch_tdep *tdep = NULL; + struct gdbarch *gdbarch; + int i; + + /* find a candidate among the list of pre-declared architectures. */ + arches = gdbarch_list_lookup_by_info (arches, &info); + if (arches != NULL) + return (arches->gdbarch); + +#if 0 + tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); +#endif + + /* Change the register names based on the current machine type. */ + if (info.bfd_arch_info->arch != bfd_arch_v850) return 0; + gdbarch = gdbarch_alloc (&info, 0); + + /* NOTE: cagney/2002-12-06: This can be deleted when this arch is + ready to unwind the PC first (see frame.c:get_prev_frame()). */ + set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_default); + for (i = 0; v850_processor_type_table[i].regnames != NULL; i++) { - if (v850_processor_type_table[i].mach == ap->mach) + if (v850_processor_type_table[i].mach == info.bfd_arch_info->mach) { v850_register_names = v850_processor_type_table[i].regnames; - tm_print_insn_info.mach = ap->mach; - return 1; + tm_print_insn_info.mach = info.bfd_arch_info->mach; + break; } } - internal_error ("Architecture `%s' unreconized", ap->printable_name); + /* + * Basic register fields and methods. + */ + set_gdbarch_num_regs (gdbarch, E_NUM_REGS); + set_gdbarch_num_pseudo_regs (gdbarch, 0); + set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM); + set_gdbarch_fp_regnum (gdbarch, E_FP_REGNUM); + set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM); + set_gdbarch_register_name (gdbarch, v850_register_name); + set_gdbarch_register_size (gdbarch, v850_reg_size); + set_gdbarch_register_bytes (gdbarch, E_ALL_REGS_SIZE); + set_gdbarch_register_byte (gdbarch, v850_register_byte); + set_gdbarch_register_raw_size (gdbarch, v850_register_raw_size); + set_gdbarch_max_register_raw_size (gdbarch, v850_reg_size); + set_gdbarch_register_virtual_size (gdbarch, v850_register_raw_size); + set_gdbarch_max_register_virtual_size (gdbarch, v850_reg_size); + set_gdbarch_register_virtual_type (gdbarch, v850_reg_virtual_type); + + set_gdbarch_read_fp (gdbarch, v850_target_read_fp); + + /* + * Frame Info + */ + set_gdbarch_init_extra_frame_info (gdbarch, v850_init_extra_frame_info); + set_gdbarch_frame_init_saved_regs (gdbarch, v850_frame_init_saved_regs); + set_gdbarch_frame_chain (gdbarch, v850_frame_chain); + set_gdbarch_saved_pc_after_call (gdbarch, v850_saved_pc_after_call); + set_gdbarch_frame_saved_pc (gdbarch, v850_frame_saved_pc); + set_gdbarch_skip_prologue (gdbarch, v850_skip_prologue); + set_gdbarch_frame_chain_valid (gdbarch, generic_file_frame_chain_valid); + + /* + * Miscelany + */ + /* Stack grows up. */ + set_gdbarch_inner_than (gdbarch, core_addr_lessthan); + /* PC stops zero byte after a trap instruction + (which means: exactly on trap instruction). */ + set_gdbarch_decr_pc_after_break (gdbarch, 0); + /* This value is almost never non-zero... */ + set_gdbarch_function_start_offset (gdbarch, 0); + /* This value is almost never non-zero... */ + set_gdbarch_frame_args_skip (gdbarch, 0); + /* OK to default this value to 'unknown'. */ + set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); + + /* + * Call Dummies + * + * These values and methods are used when gdb calls a target function. */ + set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame); + set_gdbarch_push_return_address (gdbarch, v850_push_return_address); + set_gdbarch_deprecated_extract_return_value (gdbarch, v850_extract_return_value); + set_gdbarch_push_arguments (gdbarch, v850_push_arguments); + set_gdbarch_pop_frame (gdbarch, v850_pop_frame); + set_gdbarch_store_struct_return (gdbarch, v850_store_struct_return); + set_gdbarch_deprecated_store_return_value (gdbarch, v850_store_return_value); + set_gdbarch_deprecated_extract_struct_value_address (gdbarch, v850_extract_struct_value_address); + set_gdbarch_use_struct_convention (gdbarch, v850_use_struct_convention); + set_gdbarch_call_dummy_address (gdbarch, entry_point_address); + set_gdbarch_call_dummy_start_offset (gdbarch, 0); + set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0); + set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); + set_gdbarch_call_dummy_length (gdbarch, 0); + set_gdbarch_call_dummy_p (gdbarch, 1); + set_gdbarch_call_dummy_words (gdbarch, call_dummy_nil); + set_gdbarch_sizeof_call_dummy_words (gdbarch, 0); + set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); + /* set_gdbarch_call_dummy_stack_adjust */ + set_gdbarch_fix_call_dummy (gdbarch, v850_fix_call_dummy); + set_gdbarch_breakpoint_from_pc (gdbarch, v850_breakpoint_from_pc); + + set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT); + set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT); + set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT); + set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); + + set_gdbarch_extra_stack_alignment_needed (gdbarch, 0); + + return gdbarch; } void -_initialize_v850_tdep () +_initialize_v850_tdep (void) { tm_print_insn = print_insn_v850; - target_architecture_hook = v850_target_architecture_hook; + register_gdbarch_init (bfd_arch_v850, v850_gdbarch_init); }