X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Frs6000-tdep.c;h=5eef8959115048aa8420fc7e4586b1a99e5b3444;hb=f3205b34a11f36b6c6e8f9b81e08b7b4818478e8;hp=a650f68ac92fcb8fc78ef80aed1c29002354e28a;hpb=8b69000d632078058da0ac203a220967f9ce77f7;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c index a650f68ac9..5eef895911 100644 --- a/gdb/rs6000-tdep.c +++ b/gdb/rs6000-tdep.c @@ -1,7 +1,8 @@ /* Target-dependent code for GDB, the GNU debugger. - Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, - 1998, 1999, 2000, 2001, 2002 - Free Software Foundation, Inc. + + Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, + 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software + Foundation, Inc. This file is part of GDB. @@ -27,13 +28,13 @@ #include "target.h" #include "gdbcore.h" #include "gdbcmd.h" -#include "symfile.h" #include "objfiles.h" #include "arch-utils.h" #include "regcache.h" #include "doublest.h" #include "value.h" #include "parser-defs.h" +#include "osabi.h" #include "libbfd.h" /* for bfd_default_set_arch_mach */ #include "coff/internal.h" /* for libcoff.h */ @@ -46,6 +47,9 @@ #include "solib-svr4.h" #include "ppc-tdep.h" +#include "gdb_assert.h" +#include "dis-asm.h" + /* If the kernel has to deliver a signal, it pushes a sigcontext structure on the stack and then calls the signal handler, passing the address of the sigcontext in an argument register. Usually @@ -134,6 +138,18 @@ altivec_register_p (int regno) return (regno >= tdep->ppc_vr0_regnum && regno <= tdep->ppc_vrsave_regnum); } +/* Use the architectures FP registers? */ +int +ppc_floating_point_unit_p (struct gdbarch *gdbarch) +{ + const struct bfd_arch_info *info = gdbarch_bfd_arch_info (gdbarch); + if (info->arch == bfd_arch_powerpc) + return (info->mach != bfd_mach_ppc_e500); + if (info->arch == bfd_arch_rs6000) + return 1; + return 0; +} + /* Read a LEN-byte address from debugged memory address MEMADDR. */ static CORE_ADDR @@ -166,16 +182,16 @@ struct frame_extra_info void rs6000_init_extra_frame_info (int fromleaf, struct frame_info *fi) { - fi->extra_info = (struct frame_extra_info *) - frame_obstack_alloc (sizeof (struct frame_extra_info)); - fi->extra_info->initial_sp = 0; - if (fi->next != (CORE_ADDR) 0 - && fi->pc < TEXT_SEGMENT_BASE) + struct frame_extra_info *extra_info = + frame_extra_info_zalloc (fi, sizeof (struct frame_extra_info)); + extra_info->initial_sp = 0; + if (get_next_frame (fi) != NULL + && get_frame_pc (fi) < TEXT_SEGMENT_BASE) /* We're in get_prev_frame */ /* and this is a special signal frame. */ /* (fi->pc will be some low address in the kernel, */ /* to which the signal handler returns). */ - fi->signal_handler_caller = 1; + deprecated_set_frame_type (fi, SIGTRAMP_FRAME); } /* Put here the code to store, into a struct frame_saved_regs, @@ -197,8 +213,9 @@ rs6000_frame_init_saved_regs (struct frame_info *fi) static CORE_ADDR rs6000_frame_args_address (struct frame_info *fi) { - if (fi->extra_info->initial_sp != 0) - return fi->extra_info->initial_sp; + struct frame_extra_info *extra_info = get_frame_extra_info (fi); + if (extra_info->initial_sp != 0) + return extra_info->initial_sp; else return frame_initial_stack_address (fi); } @@ -214,6 +231,16 @@ rs6000_saved_pc_after_call (struct frame_info *fi) return read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum); } +/* Get the ith function argument for the current function. */ +static CORE_ADDR +rs6000_fetch_pointer_argument (struct frame_info *frame, int argi, + struct type *type) +{ + CORE_ADDR addr; + get_frame_register (frame, 3 + argi, &addr); + return addr; +} + /* Calculate the destination of a branch/jump. Return -1 if not a branch. */ static CORE_ADDR @@ -261,7 +288,7 @@ branch_dest (int opcode, int instr, CORE_ADDR pc, CORE_ADDR safety) fi = get_current_frame (); if (fi != NULL) - dest = read_memory_addr (fi->frame + SIG_FRAME_PC_OFFSET, + dest = read_memory_addr (get_frame_base (fi) + SIG_FRAME_PC_OFFSET, gdbarch_tdep (current_gdbarch)->wordsize); } } @@ -289,14 +316,11 @@ branch_dest (int opcode, int instr, CORE_ADDR pc, CORE_ADDR safety) /* Sequence of bytes for breakpoint instruction. */ -#define BIG_BREAKPOINT { 0x7d, 0x82, 0x10, 0x08 } -#define LITTLE_BREAKPOINT { 0x08, 0x10, 0x82, 0x7d } - const static unsigned char * rs6000_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size) { - static unsigned char big_breakpoint[] = BIG_BREAKPOINT; - static unsigned char little_breakpoint[] = LITTLE_BREAKPOINT; + static unsigned char big_breakpoint[] = { 0x7d, 0x82, 0x10, 0x08 }; + static unsigned char little_breakpoint[] = { 0x08, 0x10, 0x82, 0x7d }; *bp_size = 4; if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) return big_breakpoint; @@ -401,6 +425,10 @@ static int max_skip_non_prologue_insns = 10; the line data in the symbol table. If successful, a better guess on where the prologue ends is returned, otherwise the previous value of lim_pc is returned. */ + +/* FIXME: cagney/2004-02-14: This function and logic have largely been + superseded by skip_prologue_using_sal. */ + static CORE_ADDR refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc) { @@ -465,6 +493,7 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) int prev_insn_was_prologue_insn = 1; int num_skip_non_prologue_insns = 0; const struct bfd_arch_info *arch_info = gdbarch_bfd_arch_info (current_gdbarch); + struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); /* Attempt to find the end of the prologue when no limit is specified. Note that refine_prologue_limit() has been written so that it may @@ -512,13 +541,13 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) if ((op & 0xfc1fffff) == 0x7c0802a6) { /* mflr Rx */ - lr_reg = (op & 0x03e00000) | 0x90010000; + lr_reg = (op & 0x03e00000); continue; } else if ((op & 0xfc1fffff) == 0x7c000026) { /* mfcr Rx */ - cr_reg = (op & 0x03e00000) | 0x90010000; + cr_reg = (op & 0x03e00000); continue; } @@ -544,7 +573,7 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) { fdata->saved_gpr = reg; if ((op & 0xfc1f0003) == 0xf8010000) - op = (op >> 1) << 1; + op &= ~3UL; fdata->gpr_offset = SIGNED_SHORT (op) + offset; } continue; @@ -576,20 +605,42 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) continue; } - else if (lr_reg != -1 && (op & 0xffff0000) == lr_reg) - { /* st Rx,NUM(r1) - where Rx == lr */ - fdata->lr_offset = SIGNED_SHORT (op) + offset; + else if (lr_reg != -1 && + /* std Rx, NUM(r1) || stdu Rx, NUM(r1) */ + (((op & 0xffff0000) == (lr_reg | 0xf8010000)) || + /* stw Rx, NUM(r1) */ + ((op & 0xffff0000) == (lr_reg | 0x90010000)) || + /* stwu Rx, NUM(r1) */ + ((op & 0xffff0000) == (lr_reg | 0x94010000)))) + { /* where Rx == lr */ + fdata->lr_offset = offset; fdata->nosavedpc = 0; lr_reg = 0; + if ((op & 0xfc000003) == 0xf8000000 || /* std */ + (op & 0xfc000000) == 0x90000000) /* stw */ + { + /* Does not update r1, so add displacement to lr_offset. */ + fdata->lr_offset += SIGNED_SHORT (op); + } continue; } - else if (cr_reg != -1 && (op & 0xffff0000) == cr_reg) - { /* st Rx,NUM(r1) - where Rx == cr */ - fdata->cr_offset = SIGNED_SHORT (op) + offset; + else if (cr_reg != -1 && + /* std Rx, NUM(r1) || stdu Rx, NUM(r1) */ + (((op & 0xffff0000) == (cr_reg | 0xf8010000)) || + /* stw Rx, NUM(r1) */ + ((op & 0xffff0000) == (cr_reg | 0x90010000)) || + /* stwu Rx, NUM(r1) */ + ((op & 0xffff0000) == (cr_reg | 0x94010000)))) + { /* where Rx == cr */ + fdata->cr_offset = offset; cr_reg = 0; + if ((op & 0xfc000003) == 0xf8000000 || + (op & 0xfc000000) == 0x90000000) + { + /* Does not update r1, so add displacement to cr_offset. */ + fdata->cr_offset += SIGNED_SHORT (op); + } continue; } @@ -633,30 +684,41 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) this branch */ continue; - /* update stack pointer */ } - else if ((op & 0xffff0000) == 0x94210000 || /* stu r1,NUM(r1) */ - (op & 0xffff0003) == 0xf8210001) /* stdu r1,NUM(r1) */ - { + /* update stack pointer */ + else if ((op & 0xfc1f0000) == 0x94010000) + { /* stu rX,NUM(r1) || stwu rX,NUM(r1) */ fdata->frameless = 0; - if ((op & 0xffff0003) == 0xf8210001) - op = (op >> 1) << 1; fdata->offset = SIGNED_SHORT (op); offset = fdata->offset; continue; - } - else if (op == 0x7c21016e) - { /* stwux 1,1,0 */ + else if ((op & 0xfc1f016a) == 0x7c01016e) + { /* stwux rX,r1,rY */ + /* no way to figure out what r1 is going to be */ fdata->frameless = 0; offset = fdata->offset; continue; - - /* Load up minimal toc pointer */ } - else if ((op >> 22) == 0x20f + else if ((op & 0xfc1f0003) == 0xf8010001) + { /* stdu rX,NUM(r1) */ + fdata->frameless = 0; + fdata->offset = SIGNED_SHORT (op & ~3UL); + offset = fdata->offset; + continue; + } + else if ((op & 0xfc1f016a) == 0x7c01016a) + { /* stdux rX,r1,rY */ + /* no way to figure out what r1 is going to be */ + fdata->frameless = 0; + offset = fdata->offset; + continue; + } + /* Load up minimal toc pointer */ + else if (((op >> 22) == 0x20f || /* l r31,... or l r30,... */ + (op >> 22) == 0x3af) /* ld r31,... or ld r30,... */ && !minimal_toc_loaded) - { /* l r31,... or l r30,... */ + { minimal_toc_loaded = 1; continue; @@ -694,7 +756,7 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) { /* mr r31, r1 */ fdata->frameless = 0; framep = 1; - fdata->alloca_reg = 31; + fdata->alloca_reg = (tdep->ppc_gp0_regnum + 31); continue; /* Another way to set up the frame pointer. */ @@ -703,7 +765,8 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) { /* addi rX, r1, 0x0 */ fdata->frameless = 0; framep = 1; - fdata->alloca_reg = (op & ~0x38010000) >> 21; + fdata->alloca_reg = (tdep->ppc_gp0_regnum + + ((op & ~0x38010000) >> 21)); continue; } /* AltiVec related instructions. */ @@ -926,7 +989,8 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) initializer function as well. */ tmp = find_pc_misc_function (pc); - if (tmp >= 0 && STREQ (misc_function_vector[tmp].name, main_name ())) + if (tmp >= 0 + && strcmp (misc_function_vector[tmp].name, main_name ()) == 0) return pc + 8; } } @@ -954,9 +1018,11 @@ rs6000_pop_frame (void) int ii, wordsize; pc = read_pc (); - sp = FRAME_FP (frame); + sp = get_frame_base (frame); - if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) + if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (frame), + get_frame_base (frame), + get_frame_base (frame))) { generic_pop_dummy_frame (); flush_cached_frames (); @@ -964,14 +1030,14 @@ rs6000_pop_frame (void) } /* Make sure that all registers are valid. */ - read_register_bytes (0, NULL, REGISTER_BYTES); + deprecated_read_register_bytes (0, NULL, DEPRECATED_REGISTER_BYTES); /* Figure out previous %pc value. If the function is frameless, it is still in the link register, otherwise walk the frames and retrieve the saved %pc value in the previous frame. */ - addr = get_pc_function_start (frame->pc); - (void) skip_prologue (addr, frame->pc, &fdata); + addr = get_frame_func (frame); + (void) skip_prologue (addr, get_frame_pc (frame), &fdata); wordsize = gdbarch_tdep (current_gdbarch)->wordsize; if (fdata.frameless) @@ -993,7 +1059,8 @@ rs6000_pop_frame (void) addr = prev_sp + fdata.gpr_offset; for (ii = fdata.saved_gpr; ii <= 31; ++ii) { - read_memory (addr, ®isters[REGISTER_BYTE (ii)], wordsize); + read_memory (addr, &deprecated_registers[DEPRECATED_REGISTER_BYTE (ii)], + wordsize); addr += wordsize; } } @@ -1003,7 +1070,7 @@ rs6000_pop_frame (void) addr = prev_sp + fdata.fpr_offset; for (ii = fdata.saved_fpr; ii <= 31; ++ii) { - read_memory (addr, ®isters[REGISTER_BYTE (ii + FP0_REGNUM)], 8); + read_memory (addr, &deprecated_registers[DEPRECATED_REGISTER_BYTE (ii + FP0_REGNUM)], 8); addr += 8; } } @@ -1013,23 +1080,11 @@ rs6000_pop_frame (void) flush_cached_frames (); } -/* Fixup the call sequence of a dummy function, with the real function - address. Its arguments will be passed by gdb. */ - -static void -rs6000_fix_call_dummy (char *dummyname, CORE_ADDR pc, CORE_ADDR fun, - int nargs, struct value **args, struct type *type, - int gcc_p) +/* All the ABI's require 16 byte alignment. */ +static CORE_ADDR +rs6000_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) { - int ii; - CORE_ADDR target_addr; - - if (rs6000_find_toc_address_hook != NULL) - { - CORE_ADDR tocvalue = (*rs6000_find_toc_address_hook) (fun); - write_register (gdbarch_tdep (current_gdbarch)->ppc_toc_regnum, - tocvalue); - } + return (addr & -16); } /* Pass the arguments in either registers, or in the stack. In RS/6000, @@ -1049,9 +1104,12 @@ rs6000_fix_call_dummy (char *dummyname, CORE_ADDR pc, CORE_ADDR fun, starting from r4. */ static CORE_ADDR -rs6000_push_arguments (int nargs, struct value **args, CORE_ADDR sp, - int struct_return, CORE_ADDR struct_addr) +rs6000_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr, + struct regcache *regcache, CORE_ADDR bp_addr, + int nargs, struct value **args, CORE_ADDR sp, + int struct_return, CORE_ADDR struct_addr) { + struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); int ii; int len = 0; int argno; /* current argument number */ @@ -1066,14 +1124,19 @@ rs6000_push_arguments (int nargs, struct value **args, CORE_ADDR sp, CORE_ADDR saved_sp; /* The first eight words of ther arguments are passed in registers. - Copy them appropriately. - - If the function is returning a `struct', then the first word (which - will be passed in r3) is used for struct return address. In that - case we should advance one word and start from r4 register to copy - parameters. */ - - ii = struct_return ? 1 : 0; + Copy them appropriately. */ + ii = 0; + + /* If the function is returning a `struct', then the first word + (which will be passed in r3) is used for struct return address. + In that case we should advance one word and start from r4 + register to copy parameters. */ + if (struct_return) + { + regcache_raw_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3, + struct_addr); + ii++; + } /* effectively indirect call... gcc does... @@ -1096,7 +1159,7 @@ rs6000_push_arguments (int nargs, struct value **args, CORE_ADDR sp, for (argno = 0, argbytes = 0; argno < nargs && ii < 8; ++ii) { - int reg_size = REGISTER_RAW_SIZE (ii + 3); + int reg_size = DEPRECATED_REGISTER_RAW_SIZE (ii + 3); arg = args[argno]; type = check_typedef (VALUE_TYPE (arg)); @@ -1113,7 +1176,7 @@ rs6000_push_arguments (int nargs, struct value **args, CORE_ADDR sp, printf_unfiltered ( "Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno); - memcpy (®isters[REGISTER_BYTE (FP0_REGNUM + 1 + f_argno)], + memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM + 1 + f_argno)], VALUE_CONTENTS (arg), len); ++f_argno; @@ -1125,8 +1188,9 @@ rs6000_push_arguments (int nargs, struct value **args, CORE_ADDR sp, /* Argument takes more than one register. */ while (argbytes < len) { - memset (®isters[REGISTER_BYTE (ii + 3)], 0, reg_size); - memcpy (®isters[REGISTER_BYTE (ii + 3)], + memset (&deprecated_registers[DEPRECATED_REGISTER_BYTE (ii + 3)], 0, + reg_size); + memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (ii + 3)], ((char *) VALUE_CONTENTS (arg)) + argbytes, (len - argbytes) > reg_size ? reg_size : len - argbytes); @@ -1142,8 +1206,8 @@ rs6000_push_arguments (int nargs, struct value **args, CORE_ADDR sp, { /* Argument can fit in one register. No problem. */ int adj = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? reg_size - len : 0; - memset (®isters[REGISTER_BYTE (ii + 3)], 0, reg_size); - memcpy ((char *)®isters[REGISTER_BYTE (ii + 3)] + adj, + memset (&deprecated_registers[DEPRECATED_REGISTER_BYTE (ii + 3)], 0, reg_size); + memcpy ((char *)&deprecated_registers[DEPRECATED_REGISTER_BYTE (ii + 3)] + adj, VALUE_CONTENTS (arg), len); } ++argno; @@ -1190,10 +1254,10 @@ ran_out_of_registers_for_arguments: /* This is another instance we need to be concerned about securing our stack space. If we write anything underneath %sp (r1), we might conflict with the kernel who thinks he is free - to use this area. So, update %sp first before doing anything + to use this area. So, update %sp first before doing anything else. */ - write_register (SP_REGNUM, sp); + regcache_raw_write_signed (regcache, SP_REGNUM, sp); /* If the last argument copied into the registers didn't fit there completely, push the rest of it into stack. */ @@ -1225,7 +1289,7 @@ ran_out_of_registers_for_arguments: printf_unfiltered ( "Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno); - memcpy (®isters[REGISTER_BYTE (FP0_REGNUM + 1 + f_argno)], + memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM + 1 + f_argno)], VALUE_CONTENTS (arg), len); ++f_argno; @@ -1235,86 +1299,45 @@ ran_out_of_registers_for_arguments: ii += ((len + 3) & -4) / 4; } } - else - /* Secure stack areas first, before doing anything else. */ - write_register (SP_REGNUM, sp); - /* set back chain properly */ - store_address (tmp_buffer, 4, saved_sp); + /* Set the stack pointer. According to the ABI, the SP is meant to + be set _before_ the corresponding stack space is used. On AIX, + this even applies when the target has been completely stopped! + Not doing this can lead to conflicts with the kernel which thinks + that it still has control over this not-yet-allocated stack + region. */ + regcache_raw_write_signed (regcache, SP_REGNUM, sp); + + /* Set back chain properly. */ + store_unsigned_integer (tmp_buffer, 4, saved_sp); write_memory (sp, tmp_buffer, 4); - target_store_registers (-1); - return sp; -} + /* Point the inferior function call's return address at the dummy's + breakpoint. */ + regcache_raw_write_signed (regcache, tdep->ppc_lr_regnum, bp_addr); -/* Function: ppc_push_return_address (pc, sp) - Set up the return address for the inferior function call. */ + /* Set the TOC register, get the value from the objfile reader + which, in turn, gets it from the VMAP table. */ + if (rs6000_find_toc_address_hook != NULL) + { + CORE_ADDR tocvalue = (*rs6000_find_toc_address_hook) (func_addr); + regcache_raw_write_signed (regcache, tdep->ppc_toc_regnum, tocvalue); + } -static CORE_ADDR -ppc_push_return_address (CORE_ADDR pc, CORE_ADDR sp) -{ - write_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum, - CALL_DUMMY_ADDRESS ()); + target_store_registers (-1); return sp; } -/* Extract a function return value of type TYPE from raw register array - REGBUF, and copy that return value into VALBUF in virtual format. */ -static void -e500_extract_return_value (struct type *valtype, struct regcache *regbuf, void *valbuf) -{ - int offset = 0; - int vallen = TYPE_LENGTH (valtype); - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY - && vallen == 8 - && TYPE_VECTOR (valtype)) - { - regcache_raw_read (regbuf, tdep->ppc_ev0_regnum + 3, valbuf); - } - else - { - /* Return value is copied starting from r3. Note that r3 for us - is a pseudo register. */ - int offset = 0; - int return_regnum = tdep->ppc_gp0_regnum + 3; - int reg_size = REGISTER_RAW_SIZE (return_regnum); - int reg_part_size; - char *val_buffer; - int copied = 0; - int i = 0; - - /* Compute where we will start storing the value from. */ - if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) - { - if (vallen <= reg_size) - offset = reg_size - vallen; - else - offset = reg_size + (reg_size - vallen); - } - - /* How big does the local buffer need to be? */ - if (vallen <= reg_size) - val_buffer = alloca (reg_size); - else - val_buffer = alloca (vallen); +/* PowerOpen always puts structures in memory. Vectors, which were + added later, do get returned in a register though. */ - /* Read all we need into our private buffer. We copy it in - chunks that are as long as one register, never shorter, even - if the value is smaller than the register. */ - while (copied < vallen) - { - reg_part_size = REGISTER_RAW_SIZE (return_regnum + i); - /* It is a pseudo/cooked register. */ - regcache_cooked_read (regbuf, return_regnum + i, - val_buffer + copied); - copied += reg_part_size; - i++; - } - /* Put the stuff in the return buffer. */ - memcpy (valbuf, val_buffer + offset, vallen); - } +static int +rs6000_use_struct_convention (int gcc_p, struct type *value_type) +{ + if ((TYPE_LENGTH (value_type) == 16 || TYPE_LENGTH (value_type) == 8) + && TYPE_VECTOR (value_type)) + return 0; + return 1; } static void @@ -1334,11 +1357,11 @@ rs6000_extract_return_value (struct type *valtype, char *regbuf, char *valbuf) if (TYPE_LENGTH (valtype) > 4) /* this is a double */ memcpy (valbuf, - ®buf[REGISTER_BYTE (FP0_REGNUM + 1)], + ®buf[DEPRECATED_REGISTER_BYTE (FP0_REGNUM + 1)], TYPE_LENGTH (valtype)); else { /* float */ - memcpy (&dd, ®buf[REGISTER_BYTE (FP0_REGNUM + 1)], 8); + memcpy (&dd, ®buf[DEPRECATED_REGISTER_BYTE (FP0_REGNUM + 1)], 8); ff = (float) dd; memcpy (valbuf, &ff, sizeof (float)); } @@ -1347,29 +1370,22 @@ rs6000_extract_return_value (struct type *valtype, char *regbuf, char *valbuf) && TYPE_LENGTH (valtype) == 16 && TYPE_VECTOR (valtype)) { - memcpy (valbuf, regbuf + REGISTER_BYTE (tdep->ppc_vr0_regnum + 2), + memcpy (valbuf, regbuf + DEPRECATED_REGISTER_BYTE (tdep->ppc_vr0_regnum + 2), TYPE_LENGTH (valtype)); } else { /* return value is copied starting from r3. */ if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG - && TYPE_LENGTH (valtype) < REGISTER_RAW_SIZE (3)) - offset = REGISTER_RAW_SIZE (3) - TYPE_LENGTH (valtype); + && TYPE_LENGTH (valtype) < DEPRECATED_REGISTER_RAW_SIZE (3)) + offset = DEPRECATED_REGISTER_RAW_SIZE (3) - TYPE_LENGTH (valtype); memcpy (valbuf, - regbuf + REGISTER_BYTE (3) + offset, + regbuf + DEPRECATED_REGISTER_BYTE (3) + offset, TYPE_LENGTH (valtype)); } } -/* Keep structure return address in this variable. - FIXME: This is a horrid kludge which should not be allowed to continue - living. This only allows a single nested call to a structure-returning - function. Come on, guys! -- gnu@cygnus.com, Aug 92 */ - -static CORE_ADDR rs6000_struct_return_address; - /* Return whether handle_inferior_event() should proceed through code starting at PC in function NAME when stepping. @@ -1415,7 +1431,7 @@ rs6000_in_solib_return_trampoline (CORE_ADDR pc, char *name) CORE_ADDR rs6000_skip_trampoline_code (CORE_ADDR pc) { - register unsigned int ii, op; + unsigned int ii, op; int rel; CORE_ADDR solib_target_pc; struct minimal_symbol *msymbol; @@ -1434,7 +1450,7 @@ rs6000_skip_trampoline_code (CORE_ADDR pc) /* Check for bigtoc fixup code. */ msymbol = lookup_minimal_symbol_by_pc (pc); - if (msymbol && rs6000_in_solib_return_trampoline (pc, SYMBOL_NAME (msymbol))) + if (msymbol && rs6000_in_solib_return_trampoline (pc, DEPRECATED_SYMBOL_NAME (msymbol))) { /* Double-check that the third instruction from PC is relative "b". */ op = read_memory_integer (pc + 8, 4); @@ -1473,10 +1489,11 @@ rs6000_frameless_function_invocation (struct frame_info *fi) /* Don't even think about framelessness except on the innermost frame or if the function was interrupted by a signal. */ - if (fi->next != NULL && !fi->next->signal_handler_caller) + if (get_next_frame (fi) != NULL + && !(get_frame_type (get_next_frame (fi)) == SIGTRAMP_FRAME)) return 0; - func_start = get_pc_function_start (fi->pc); + func_start = get_frame_func (fi); /* If we failed to find the start of the function, it is a mistake to inspect the instructions. */ @@ -1487,13 +1504,13 @@ rs6000_frameless_function_invocation (struct frame_info *fi) function pointer, normally causing an immediate core dump of the inferior. Mark function as frameless, as the inferior has no chance of setting up a stack frame. */ - if (fi->pc == 0) + if (get_frame_pc (fi) == 0) return 1; else return 0; } - (void) skip_prologue (func_start, fi->pc, &fdata); + (void) skip_prologue (func_start, get_frame_pc (fi), &fdata); return fdata.frameless; } @@ -1507,27 +1524,32 @@ rs6000_frame_saved_pc (struct frame_info *fi) struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); int wordsize = tdep->wordsize; - if (fi->signal_handler_caller) - return read_memory_addr (fi->frame + SIG_FRAME_PC_OFFSET, wordsize); + if ((get_frame_type (fi) == SIGTRAMP_FRAME)) + return read_memory_addr (get_frame_base (fi) + SIG_FRAME_PC_OFFSET, + wordsize); - if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) - return deprecated_read_register_dummy (fi->pc, fi->frame, PC_REGNUM); + if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), + get_frame_base (fi), + get_frame_base (fi))) + return deprecated_read_register_dummy (get_frame_pc (fi), + get_frame_base (fi), PC_REGNUM); - func_start = get_pc_function_start (fi->pc); + func_start = get_frame_func (fi); /* If we failed to find the start of the function, it is a mistake to inspect the instructions. */ if (!func_start) return 0; - (void) skip_prologue (func_start, fi->pc, &fdata); + (void) skip_prologue (func_start, get_frame_pc (fi), &fdata); - if (fdata.lr_offset == 0 && fi->next != NULL) + if (fdata.lr_offset == 0 && get_next_frame (fi) != NULL) { - if (fi->next->signal_handler_caller) - return read_memory_addr (fi->next->frame + SIG_FRAME_LR_OFFSET, + if ((get_frame_type (get_next_frame (fi)) == SIGTRAMP_FRAME)) + return read_memory_addr ((get_frame_base (get_next_frame (fi)) + + SIG_FRAME_LR_OFFSET), wordsize); - else if (PC_IN_CALL_DUMMY (get_next_frame (fi)->pc, 0, 0)) + else if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (get_next_frame (fi)), 0, 0)) /* The link register wasn't saved by this frame and the next (inner, newer) frame is a dummy. Get the link register value by unwinding it from that [dummy] frame. */ @@ -1538,14 +1560,16 @@ rs6000_frame_saved_pc (struct frame_info *fi) return lr; } else - return read_memory_addr (FRAME_CHAIN (fi) + tdep->lr_frame_offset, + return read_memory_addr (DEPRECATED_FRAME_CHAIN (fi) + + tdep->lr_frame_offset, wordsize); } if (fdata.lr_offset == 0) return read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum); - return read_memory_addr (FRAME_CHAIN (fi) + fdata.lr_offset, wordsize); + return read_memory_addr (DEPRECATED_FRAME_CHAIN (fi) + fdata.lr_offset, + wordsize); } /* If saved registers of frame FI are not known yet, read and cache them. @@ -1560,13 +1584,13 @@ frame_get_saved_regs (struct frame_info *fi, struct rs6000_framedata *fdatap) struct gdbarch_tdep * tdep = gdbarch_tdep (current_gdbarch); int wordsize = tdep->wordsize; - if (fi->saved_regs) + if (deprecated_get_frame_saved_regs (fi)) return; if (fdatap == NULL) { fdatap = &work_fdata; - (void) skip_prologue (get_pc_function_start (fi->pc), fi->pc, fdatap); + (void) skip_prologue (get_frame_func (fi), get_frame_pc (fi), fdatap); } frame_saved_regs_zalloc (fi); @@ -1591,7 +1615,7 @@ frame_get_saved_regs (struct frame_info *fi, struct rs6000_framedata *fdatap) ->frame pointed to the outer-most address of the frame. In the mean time, the address of the prev frame is used as the base address of this frame. */ - frame_addr = FRAME_CHAIN (fi); + frame_addr = DEPRECATED_FRAME_CHAIN (fi); /* if != -1, fdatap->saved_fpr is the smallest number of saved_fpr. All fpr's from saved_fpr to fp31 are saved. */ @@ -1602,7 +1626,7 @@ frame_get_saved_regs (struct frame_info *fi, struct rs6000_framedata *fdatap) CORE_ADDR fpr_addr = frame_addr + fdatap->fpr_offset; for (i = fdatap->saved_fpr; i < 32; i++) { - fi->saved_regs[FP0_REGNUM + i] = fpr_addr; + deprecated_get_frame_saved_regs (fi)[FP0_REGNUM + i] = fpr_addr; fpr_addr += 8; } } @@ -1616,7 +1640,7 @@ frame_get_saved_regs (struct frame_info *fi, struct rs6000_framedata *fdatap) CORE_ADDR gpr_addr = frame_addr + fdatap->gpr_offset; for (i = fdatap->saved_gpr; i < 32; i++) { - fi->saved_regs[i] = gpr_addr; + deprecated_get_frame_saved_regs (fi)[tdep->ppc_gp0_regnum + i] = gpr_addr; gpr_addr += wordsize; } } @@ -1631,8 +1655,8 @@ frame_get_saved_regs (struct frame_info *fi, struct rs6000_framedata *fdatap) CORE_ADDR vr_addr = frame_addr + fdatap->vr_offset; for (i = fdatap->saved_vr; i < 32; i++) { - fi->saved_regs[tdep->ppc_vr0_regnum + i] = vr_addr; - vr_addr += REGISTER_RAW_SIZE (tdep->ppc_vr0_regnum); + deprecated_get_frame_saved_regs (fi)[tdep->ppc_vr0_regnum + i] = vr_addr; + vr_addr += DEPRECATED_REGISTER_RAW_SIZE (tdep->ppc_vr0_regnum); } } } @@ -1647,9 +1671,9 @@ frame_get_saved_regs (struct frame_info *fi, struct rs6000_framedata *fdatap) CORE_ADDR ev_addr = frame_addr + fdatap->ev_offset; for (i = fdatap->saved_ev; i < 32; i++) { - fi->saved_regs[tdep->ppc_ev0_regnum + i] = ev_addr; - fi->saved_regs[tdep->ppc_gp0_regnum + i] = ev_addr + 4; - ev_addr += REGISTER_RAW_SIZE (tdep->ppc_ev0_regnum); + deprecated_get_frame_saved_regs (fi)[tdep->ppc_ev0_regnum + i] = ev_addr; + deprecated_get_frame_saved_regs (fi)[tdep->ppc_gp0_regnum + i] = ev_addr + 4; + ev_addr += DEPRECATED_REGISTER_RAW_SIZE (tdep->ppc_ev0_regnum); } } } @@ -1657,17 +1681,17 @@ frame_get_saved_regs (struct frame_info *fi, struct rs6000_framedata *fdatap) /* If != 0, fdatap->cr_offset is the offset from the frame that holds the CR. */ if (fdatap->cr_offset != 0) - fi->saved_regs[tdep->ppc_cr_regnum] = frame_addr + fdatap->cr_offset; + deprecated_get_frame_saved_regs (fi)[tdep->ppc_cr_regnum] = frame_addr + fdatap->cr_offset; /* If != 0, fdatap->lr_offset is the offset from the frame that holds the LR. */ if (fdatap->lr_offset != 0) - fi->saved_regs[tdep->ppc_lr_regnum] = frame_addr + fdatap->lr_offset; + deprecated_get_frame_saved_regs (fi)[tdep->ppc_lr_regnum] = frame_addr + fdatap->lr_offset; /* If != 0, fdatap->vrsave_offset is the offset from the frame that holds the VRSAVE. */ if (fdatap->vrsave_offset != 0) - fi->saved_regs[tdep->ppc_vrsave_regnum] = frame_addr + fdatap->vrsave_offset; + deprecated_get_frame_saved_regs (fi)[tdep->ppc_vrsave_regnum] = frame_addr + fdatap->vrsave_offset; } /* Return the address of a frame. This is the inital %sp value when the frame @@ -1684,17 +1708,17 @@ frame_initial_stack_address (struct frame_info *fi) /* If the initial stack pointer (frame address) of this frame is known, just return it. */ - if (fi->extra_info->initial_sp) - return fi->extra_info->initial_sp; + if (get_frame_extra_info (fi)->initial_sp) + return get_frame_extra_info (fi)->initial_sp; /* Find out if this function is using an alloca register. */ - (void) skip_prologue (get_pc_function_start (fi->pc), fi->pc, &fdata); + (void) skip_prologue (get_frame_func (fi), get_frame_pc (fi), &fdata); /* If saved registers of this frame are not known yet, read and cache them. */ - if (!fi->saved_regs) + if (!deprecated_get_frame_saved_regs (fi)) frame_get_saved_regs (fi, &fdata); /* If no alloca register used, then fi->frame is the value of the %sp for @@ -1702,34 +1726,34 @@ frame_initial_stack_address (struct frame_info *fi) if (fdata.alloca_reg < 0) { - fi->extra_info->initial_sp = fi->frame; - return fi->extra_info->initial_sp; + get_frame_extra_info (fi)->initial_sp = get_frame_base (fi); + return get_frame_extra_info (fi)->initial_sp; } /* There is an alloca register, use its value, in the current frame, as the initial stack pointer. */ { - char *tmpbuf = alloca (MAX_REGISTER_RAW_SIZE); + char tmpbuf[MAX_REGISTER_SIZE]; if (frame_register_read (fi, fdata.alloca_reg, tmpbuf)) { - fi->extra_info->initial_sp + get_frame_extra_info (fi)->initial_sp = extract_unsigned_integer (tmpbuf, - REGISTER_RAW_SIZE (fdata.alloca_reg)); + DEPRECATED_REGISTER_RAW_SIZE (fdata.alloca_reg)); } else /* NOTE: cagney/2002-04-17: At present the only time frame_register_read will fail is when the register isn't available. If that does happen, use the frame. */ - fi->extra_info->initial_sp = fi->frame; + get_frame_extra_info (fi)->initial_sp = get_frame_base (fi); } - return fi->extra_info->initial_sp; + return get_frame_extra_info (fi)->initial_sp; } /* Describe the pointer in each stack frame to the previous stack frame (its caller). */ -/* FRAME_CHAIN takes a frame's nominal address - and produces the frame's chain-pointer. */ +/* DEPRECATED_FRAME_CHAIN takes a frame's nominal address and produces + the frame's chain-pointer. */ /* In the case of the RS/6000, the frame's nominal address is the address of a 4-byte word containing the calling frame's address. */ @@ -1740,31 +1764,29 @@ rs6000_frame_chain (struct frame_info *thisframe) CORE_ADDR fp, fpp, lr; int wordsize = gdbarch_tdep (current_gdbarch)->wordsize; - if (PC_IN_CALL_DUMMY (thisframe->pc, thisframe->frame, thisframe->frame)) - return thisframe->frame; /* dummy frame same as caller's frame */ + if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (thisframe), + get_frame_base (thisframe), + get_frame_base (thisframe))) + /* A dummy frame always correctly chains back to the previous + frame. */ + return read_memory_addr (get_frame_base (thisframe), wordsize); - if (inside_entry_file (thisframe->pc) || - thisframe->pc == entry_point_address ()) + if (deprecated_inside_entry_file (get_frame_pc (thisframe)) + || get_frame_pc (thisframe) == entry_point_address ()) return 0; - if (thisframe->signal_handler_caller) - fp = read_memory_addr (thisframe->frame + SIG_FRAME_FP_OFFSET, - wordsize); - else if (thisframe->next != NULL - && thisframe->next->signal_handler_caller - && FRAMELESS_FUNCTION_INVOCATION (thisframe)) + if ((get_frame_type (thisframe) == SIGTRAMP_FRAME)) + fp = read_memory_addr (get_frame_base (thisframe) + SIG_FRAME_FP_OFFSET, + wordsize); + else if (get_next_frame (thisframe) != NULL + && (get_frame_type (get_next_frame (thisframe)) == SIGTRAMP_FRAME) + && (DEPRECATED_FRAMELESS_FUNCTION_INVOCATION_P () + && DEPRECATED_FRAMELESS_FUNCTION_INVOCATION (thisframe))) /* A frameless function interrupted by a signal did not change the frame pointer. */ - fp = FRAME_FP (thisframe); + fp = get_frame_base (thisframe); else - fp = read_memory_addr ((thisframe)->frame, wordsize); - - lr = read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum); - if (lr == entry_point_address ()) - if (fp != 0 && (fpp = read_memory_addr (fp, wordsize)) != 0) - if (PC_IN_CALL_DUMMY (lr, fpp, fpp)) - return fpp; - + fp = read_memory_addr (get_frame_base (thisframe), wordsize); return fp; } @@ -1827,6 +1849,10 @@ rs6000_register_virtual_type (int n) int size = regsize (reg, tdep->wordsize); switch (size) { + case 0: + return builtin_type_int0; + case 4: + return builtin_type_int32; case 8: if (tdep->ppc_ev0_regnum <= n && n <= tdep->ppc_ev31_regnum) return builtin_type_vec64; @@ -1837,23 +1863,12 @@ rs6000_register_virtual_type (int n) return builtin_type_vec128; break; default: - return builtin_type_int32; - break; + internal_error (__FILE__, __LINE__, "Register %d size %d unknown", + n, size); } } } -/* For the PowerPC, it appears that the debug info marks float parameters as - floats regardless of whether the function is prototyped, but the actual - values are always passed in as doubles. Tell gdb to always assume that - floats are passed as doubles and then converted in the callee. */ - -static int -rs6000_coerce_float_to_double (struct type *formal, struct type *actual) -{ - return 1; -} - /* Return whether register N requires conversion when moving from raw format to virtual format. @@ -1874,13 +1889,13 @@ static void rs6000_register_convert_to_virtual (int n, struct type *type, char *from, char *to) { - if (TYPE_LENGTH (type) != REGISTER_RAW_SIZE (n)) + if (TYPE_LENGTH (type) != DEPRECATED_REGISTER_RAW_SIZE (n)) { - double val = extract_floating (from, REGISTER_RAW_SIZE (n)); - store_floating (to, TYPE_LENGTH (type), val); + double val = deprecated_extract_floating (from, DEPRECATED_REGISTER_RAW_SIZE (n)); + deprecated_store_floating (to, TYPE_LENGTH (type), val); } else - memcpy (to, from, REGISTER_RAW_SIZE (n)); + memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (n)); } /* Convert data from virtual format with type TYPE in buffer FROM @@ -1888,15 +1903,15 @@ rs6000_register_convert_to_virtual (int n, struct type *type, static void rs6000_register_convert_to_raw (struct type *type, int n, - char *from, char *to) + const char *from, char *to) { - if (TYPE_LENGTH (type) != REGISTER_RAW_SIZE (n)) + if (TYPE_LENGTH (type) != DEPRECATED_REGISTER_RAW_SIZE (n)) { - double val = extract_floating (from, TYPE_LENGTH (type)); - store_floating (to, REGISTER_RAW_SIZE (n), val); + double val = deprecated_extract_floating (from, TYPE_LENGTH (type)); + deprecated_store_floating (to, DEPRECATED_REGISTER_RAW_SIZE (n), val); } else - memcpy (to, from, REGISTER_RAW_SIZE (n)); + memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (n)); } static void @@ -1905,7 +1920,7 @@ e500_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, { int base_regnum; int offset = 0; - char *temp_buffer = (char*) alloca (MAX_REGISTER_RAW_SIZE); + char temp_buffer[MAX_REGISTER_SIZE]; struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); if (reg_nr >= tdep->ppc_gp0_regnum @@ -1928,7 +1943,7 @@ e500_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, { int base_regnum; int offset = 0; - char *temp_buffer = (char*) alloca (MAX_REGISTER_RAW_SIZE); + char temp_buffer[MAX_REGISTER_SIZE]; struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); if (reg_nr >= tdep->ppc_gp0_regnum @@ -1988,45 +2003,6 @@ rs6000_stab_reg_to_regnum (int num) return regnum; } -/* Store the address of the place in which to copy the structure the - subroutine will return. This is called from call_function. - - In RS/6000, struct return addresses are passed as an extra parameter in r3. - In function return, callee is not responsible of returning this address - back. Since gdb needs to find it, we will store in a designated variable - `rs6000_struct_return_address'. */ - -static void -rs6000_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) -{ - write_register (3, addr); - rs6000_struct_return_address = addr; -} - -/* Write into appropriate registers a function return value - of type TYPE, given in virtual format. */ -static void -e500_store_return_value (struct type *type, char *valbuf) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - /* Everything is returned in GPR3 and up. */ - int copied = 0; - int i = 0; - int len = TYPE_LENGTH (type); - while (copied < len) - { - int regnum = gdbarch_tdep (current_gdbarch)->ppc_gp0_regnum + 3 + i; - int reg_size = REGISTER_RAW_SIZE (regnum); - char *reg_val_buf = alloca (reg_size); - - memcpy (reg_val_buf, valbuf + copied, reg_size); - copied += reg_size; - write_register_gen (regnum, reg_val_buf); - i++; - } -} - static void rs6000_store_return_value (struct type *type, char *valbuf) { @@ -2038,19 +2014,19 @@ rs6000_store_return_value (struct type *type, char *valbuf) Say a double_double_double type could be returned in FPR1/FPR2/FPR3 triple. */ - write_register_bytes (REGISTER_BYTE (FP0_REGNUM + 1), valbuf, - TYPE_LENGTH (type)); + deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (FP0_REGNUM + 1), valbuf, + TYPE_LENGTH (type)); else if (TYPE_CODE (type) == TYPE_CODE_ARRAY) { if (TYPE_LENGTH (type) == 16 && TYPE_VECTOR (type)) - write_register_bytes (REGISTER_BYTE (tdep->ppc_vr0_regnum + 2), - valbuf, TYPE_LENGTH (type)); + deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (tdep->ppc_vr0_regnum + 2), + valbuf, TYPE_LENGTH (type)); } else /* Everything else is returned in GPR3 and up. */ - write_register_bytes (REGISTER_BYTE (gdbarch_tdep (current_gdbarch)->ppc_gp0_regnum + 3), - valbuf, TYPE_LENGTH (type)); + deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (gdbarch_tdep (current_gdbarch)->ppc_gp0_regnum + 3), + valbuf, TYPE_LENGTH (type)); } /* Extract from an array REGBUF containing the (raw) register state @@ -2058,20 +2034,20 @@ rs6000_store_return_value (struct type *type, char *valbuf) as a CORE_ADDR (or an expression that can be used as one). */ static CORE_ADDR -rs6000_extract_struct_value_address (char *regbuf) -{ - return rs6000_struct_return_address; -} - -/* Return whether PC is in a dummy function call. - - FIXME: This just checks for the end of the stack, which is broken - for things like stepping through gcc nested function stubs. */ - -static int -rs6000_pc_in_call_dummy (CORE_ADDR pc, CORE_ADDR sp, CORE_ADDR fp) -{ - return sp < pc && pc < fp; +rs6000_extract_struct_value_address (struct regcache *regcache) +{ + /* FIXME: cagney/2002-09-26: PR gdb/724: When making an inferior + function call GDB knows the address of the struct return value + and hence, should not need to call this function. Unfortunately, + the current call_function_by_hand() code only saves the most + recent struct address leading to occasional calls. The code + should instead maintain a stack of such addresses (in the dummy + frame object). */ + /* NOTE: cagney/2002-09-26: Return 0 which indicates that we've + really got no idea where the return value is being stored. While + r3, on function entry, contained the address it will have since + been reused (scratch) and hence wouldn't be valid */ + return 0; } /* Hook called when a new child process is started. */ @@ -2083,7 +2059,7 @@ rs6000_create_inferior (int pid) rs6000_set_host_arch_hook (pid); } -/* Support for CONVERT_FROM_FUNC_PTR_ADDR(ADDR). +/* Support for CONVERT_FROM_FUNC_PTR_ADDR (ARCH, ADDR, TARG). Usually a function pointer's representation is simply the address of the function. On the RS/6000 however, a function pointer is @@ -2102,8 +2078,10 @@ rs6000_create_inferior (int pid) /* Return real function address if ADDR (a function pointer) is in the data space and is therefore a special function pointer. */ -CORE_ADDR -rs6000_convert_from_func_ptr_addr (CORE_ADDR addr) +static CORE_ADDR +rs6000_convert_from_func_ptr_addr (struct gdbarch *gdbarch, + CORE_ADDR addr, + struct target_ops *targ) { struct obj_section *s; @@ -2263,7 +2241,7 @@ rs6000_convert_from_func_ptr_addr (CORE_ADDR addr) /* 0 */ P(r0), P(r1), P(r2), P(r3), P(r4), P(r5), P(r6), P(r7), \ /* 8 */ P(r8), P(r9), P(r10),P(r11),P(r12),P(r13),P(r14),P(r15), \ /* 16 */ P(r16),P(r17),P(r18),P(r19),P(r20),P(r21),P(r22),P(r23), \ - /* 24 */ P(r24),P(r25),P(r26),P(r27),P(r28),P(r29),P(r30),P(r31), \ + /* 24 */ P(r24),P(r25),P(r26),P(r27),P(r28),P(r29),P(r30),P(r31) /* IBM POWER (pre-PowerPC) architecture, user-level view. We only cover user-level SPR's. */ @@ -2442,6 +2420,9 @@ static const struct reg registers_e500[] = PPC_UISA_NOFP_SPRS, /* 7...38 */ PPC_EV_REGS, + R8(acc), R(spefscr), + /* NOTE: Add new registers here the end of the raw register + list and just before the first pseudo register. */ /* 39...70 */ PPC_GPRS_PSEUDO_REGS }; @@ -2650,7 +2631,6 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) unsigned long mach; bfd abfd; int sysv_abi; - enum gdb_osabi osabi = GDB_OSABI_UNKNOWN; asection *sect; from_xcoff_exec = info.abfd && info.abfd->format == bfd_object && @@ -2661,9 +2641,6 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) sysv_abi = info.abfd && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour; - if (info.abfd) - osabi = gdbarch_lookup_osabi (info.abfd); - /* Check word size. If INFO is from a binary file, infer it from that, else choose a likely default. */ if (from_xcoff_exec) @@ -2698,7 +2675,7 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) meaningful, because 64-bit CPUs can run in 32-bit mode. So, perform separate word size check. */ tdep = gdbarch_tdep (arches->gdbarch); - if (tdep && tdep->wordsize == wordsize && tdep->osabi == osabi) + if (tdep && tdep->wordsize == wordsize) return arches->gdbarch; } @@ -2718,13 +2695,12 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) else { arch = bfd_arch_powerpc; - mach = 0; - bfd_default_set_arch_mach (&abfd, arch, mach); + bfd_default_set_arch_mach (&abfd, arch, 0); info.bfd_arch_info = bfd_get_arch_info (&abfd); + mach = info.bfd_arch_info->mach; } tdep = xmalloc (sizeof (struct gdbarch_tdep)); tdep->wordsize = wordsize; - tdep->osabi = osabi; /* For e500 executables, the apuinfo section is of help here. Such section contains the identifier and revision number of each @@ -2777,10 +2753,16 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_pc_regnum (gdbarch, 64); set_gdbarch_sp_regnum (gdbarch, 1); - set_gdbarch_fp_regnum (gdbarch, 1); - set_gdbarch_deprecated_extract_return_value (gdbarch, - rs6000_extract_return_value); - set_gdbarch_deprecated_store_return_value (gdbarch, rs6000_store_return_value); + set_gdbarch_deprecated_fp_regnum (gdbarch, 1); + if (sysv_abi && wordsize == 8) + set_gdbarch_return_value (gdbarch, ppc64_sysv_abi_return_value); + else if (sysv_abi && wordsize == 4) + set_gdbarch_return_value (gdbarch, ppc_sysv_abi_return_value); + else + { + set_gdbarch_deprecated_extract_return_value (gdbarch, rs6000_extract_return_value); + set_gdbarch_deprecated_store_return_value (gdbarch, rs6000_store_return_value); + } if (v->arch == bfd_arch_powerpc) switch (v->mach) @@ -2793,13 +2775,13 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) break; case bfd_mach_ppc_7400: tdep->ppc_vr0_regnum = 119; - tdep->ppc_vrsave_regnum = 153; + tdep->ppc_vrsave_regnum = 152; tdep->ppc_ev0_regnum = -1; tdep->ppc_ev31_regnum = -1; break; case bfd_mach_ppc_e500: - tdep->ppc_gp0_regnum = 39; - tdep->ppc_gplast_regnum = 70; + tdep->ppc_gp0_regnum = 41; + tdep->ppc_gplast_regnum = tdep->ppc_gp0_regnum + 32 - 1; tdep->ppc_toc_regnum = -1; tdep->ppc_ps_regnum = 1; tdep->ppc_cr_regnum = 2; @@ -2809,13 +2791,11 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) tdep->ppc_ev0_regnum = 7; tdep->ppc_ev31_regnum = 38; set_gdbarch_pc_regnum (gdbarch, 0); - set_gdbarch_sp_regnum (gdbarch, 40); - set_gdbarch_fp_regnum (gdbarch, 40); + set_gdbarch_sp_regnum (gdbarch, tdep->ppc_gp0_regnum + 1); + set_gdbarch_deprecated_fp_regnum (gdbarch, tdep->ppc_gp0_regnum + 1); set_gdbarch_dwarf2_reg_to_regnum (gdbarch, e500_dwarf2_reg_to_regnum); set_gdbarch_pseudo_register_read (gdbarch, e500_pseudo_register_read); set_gdbarch_pseudo_register_write (gdbarch, e500_pseudo_register_write); - set_gdbarch_extract_return_value (gdbarch, e500_extract_return_value); - set_gdbarch_deprecated_store_return_value (gdbarch, e500_store_return_value); break; default: tdep->ppc_vr0_regnum = -1; @@ -2825,6 +2805,9 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) break; } + /* Sanity check on registers. */ + gdb_assert (strcmp (tdep->regs[tdep->ppc_gp0_regnum].name, "r0") == 0); + /* Set lr_frame_offset. */ if (wordsize == 8) tdep->lr_frame_offset = 16; @@ -2847,23 +2830,16 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) else set_gdbarch_print_insn (gdbarch, gdb_print_insn_powerpc); - set_gdbarch_read_pc (gdbarch, generic_target_read_pc); set_gdbarch_write_pc (gdbarch, generic_target_write_pc); - set_gdbarch_read_fp (gdbarch, generic_target_read_fp); - set_gdbarch_read_sp (gdbarch, generic_target_read_sp); - set_gdbarch_write_sp (gdbarch, generic_target_write_sp); set_gdbarch_num_regs (gdbarch, v->nregs); set_gdbarch_num_pseudo_regs (gdbarch, v->npregs); set_gdbarch_register_name (gdbarch, rs6000_register_name); - set_gdbarch_register_size (gdbarch, wordsize); - set_gdbarch_register_bytes (gdbarch, off); - set_gdbarch_register_byte (gdbarch, rs6000_register_byte); - set_gdbarch_register_raw_size (gdbarch, rs6000_register_raw_size); - set_gdbarch_max_register_raw_size (gdbarch, 16); - set_gdbarch_register_virtual_size (gdbarch, generic_register_size); - set_gdbarch_max_register_virtual_size (gdbarch, 16); - set_gdbarch_register_virtual_type (gdbarch, rs6000_register_virtual_type); + set_gdbarch_deprecated_register_size (gdbarch, wordsize); + set_gdbarch_deprecated_register_bytes (gdbarch, off); + set_gdbarch_deprecated_register_byte (gdbarch, rs6000_register_byte); + set_gdbarch_deprecated_register_raw_size (gdbarch, rs6000_register_raw_size); + set_gdbarch_deprecated_register_virtual_type (gdbarch, rs6000_register_virtual_type); set_gdbarch_ptr_bit (gdbarch, wordsize * TARGET_CHAR_BIT); set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT); @@ -2872,30 +2848,28 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT); set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT); set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); - set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); + if (sysv_abi) + set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT); + else + set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); set_gdbarch_char_signed (gdbarch, 0); - set_gdbarch_use_generic_dummy_frames (gdbarch, 1); - set_gdbarch_call_dummy_length (gdbarch, 0); - set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); - set_gdbarch_call_dummy_address (gdbarch, entry_point_address); - set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); - set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0); - set_gdbarch_call_dummy_start_offset (gdbarch, 0); - set_gdbarch_pc_in_call_dummy (gdbarch, generic_pc_in_call_dummy); - set_gdbarch_call_dummy_p (gdbarch, 1); - set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); - set_gdbarch_get_saved_register (gdbarch, generic_unwind_get_saved_register); - set_gdbarch_fix_call_dummy (gdbarch, rs6000_fix_call_dummy); - set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame); - set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos); - set_gdbarch_push_return_address (gdbarch, ppc_push_return_address); + set_gdbarch_frame_align (gdbarch, rs6000_frame_align); + if (sysv_abi && wordsize == 8) + /* PPC64 SYSV. */ + set_gdbarch_frame_red_zone_size (gdbarch, 288); + else if (!sysv_abi && wordsize == 4) + /* PowerOpen / AIX 32 bit. The saved area or red zone consists of + 19 4 byte GPRS + 18 8 byte FPRs giving a total of 220 bytes. + Problem is, 220 isn't frame (16 byte) aligned. Round it up to + 224. */ + set_gdbarch_frame_red_zone_size (gdbarch, 224); + set_gdbarch_deprecated_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos); set_gdbarch_believe_pcc_promotion (gdbarch, 1); - set_gdbarch_coerce_float_to_double (gdbarch, rs6000_coerce_float_to_double); - set_gdbarch_register_convertible (gdbarch, rs6000_register_convertible); - set_gdbarch_register_convert_to_virtual (gdbarch, rs6000_register_convert_to_virtual); - set_gdbarch_register_convert_to_raw (gdbarch, rs6000_register_convert_to_raw); + set_gdbarch_deprecated_register_convertible (gdbarch, rs6000_register_convertible); + set_gdbarch_deprecated_register_convert_to_virtual (gdbarch, rs6000_register_convert_to_virtual); + set_gdbarch_deprecated_register_convert_to_raw (gdbarch, rs6000_register_convert_to_raw); set_gdbarch_stab_reg_to_regnum (gdbarch, rs6000_stab_reg_to_regnum); /* Note: kevinb/2002-04-12: I'm not convinced that rs6000_push_arguments() is correct for the SysV ABI when the wordsize is 8, but I'm also @@ -2905,39 +2879,41 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) 64-bit code. At some point in the future, this matter needs to be revisited. */ if (sysv_abi && wordsize == 4) - set_gdbarch_push_arguments (gdbarch, ppc_sysv_abi_push_arguments); + set_gdbarch_push_dummy_call (gdbarch, ppc_sysv_abi_push_dummy_call); + else if (sysv_abi && wordsize == 8) + set_gdbarch_push_dummy_call (gdbarch, ppc64_sysv_abi_push_dummy_call); else - set_gdbarch_push_arguments (gdbarch, rs6000_push_arguments); + set_gdbarch_push_dummy_call (gdbarch, rs6000_push_dummy_call); - set_gdbarch_store_struct_return (gdbarch, rs6000_store_struct_return); set_gdbarch_deprecated_extract_struct_value_address (gdbarch, rs6000_extract_struct_value_address); - set_gdbarch_pop_frame (gdbarch, rs6000_pop_frame); + set_gdbarch_deprecated_pop_frame (gdbarch, rs6000_pop_frame); set_gdbarch_skip_prologue (gdbarch, rs6000_skip_prologue); set_gdbarch_inner_than (gdbarch, core_addr_lessthan); - set_gdbarch_decr_pc_after_break (gdbarch, 0); - set_gdbarch_function_start_offset (gdbarch, 0); set_gdbarch_breakpoint_from_pc (gdbarch, rs6000_breakpoint_from_pc); + /* Handle the 64-bit SVR4 minimal-symbol convention of using "FN" + for the descriptor and ".FN" for the entry-point -- a user + specifying "break FN" will unexpectedly end up with a breakpoint + on the descriptor and not the function. This architecture method + transforms any breakpoints on descriptors into breakpoints on the + corresponding entry point. */ + if (sysv_abi && wordsize == 8) + set_gdbarch_adjust_breakpoint_address (gdbarch, ppc64_sysv_abi_adjust_breakpoint_address); + /* Not sure on this. FIXMEmgo */ set_gdbarch_frame_args_skip (gdbarch, 8); - if (sysv_abi) - set_gdbarch_use_struct_convention (gdbarch, - ppc_sysv_abi_use_struct_convention); - else + if (!sysv_abi) set_gdbarch_use_struct_convention (gdbarch, - generic_use_struct_convention); + rs6000_use_struct_convention); - set_gdbarch_frame_chain_valid (gdbarch, file_frame_chain_valid); + set_gdbarch_deprecated_frameless_function_invocation (gdbarch, rs6000_frameless_function_invocation); + set_gdbarch_deprecated_frame_chain (gdbarch, rs6000_frame_chain); + set_gdbarch_deprecated_frame_saved_pc (gdbarch, rs6000_frame_saved_pc); - set_gdbarch_frameless_function_invocation (gdbarch, - rs6000_frameless_function_invocation); - set_gdbarch_frame_chain (gdbarch, rs6000_frame_chain); - set_gdbarch_frame_saved_pc (gdbarch, rs6000_frame_saved_pc); - - set_gdbarch_frame_init_saved_regs (gdbarch, rs6000_frame_init_saved_regs); - set_gdbarch_init_extra_frame_info (gdbarch, rs6000_init_extra_frame_info); + set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, rs6000_frame_init_saved_regs); + set_gdbarch_deprecated_init_extra_frame_info (gdbarch, rs6000_init_extra_frame_info); if (!sysv_abi) { @@ -2946,16 +2922,25 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_convert_from_func_ptr_addr (gdbarch, rs6000_convert_from_func_ptr_addr); } - set_gdbarch_frame_args_address (gdbarch, rs6000_frame_args_address); - set_gdbarch_frame_locals_address (gdbarch, rs6000_frame_args_address); - set_gdbarch_saved_pc_after_call (gdbarch, rs6000_saved_pc_after_call); + set_gdbarch_deprecated_frame_args_address (gdbarch, rs6000_frame_args_address); + set_gdbarch_deprecated_frame_locals_address (gdbarch, rs6000_frame_args_address); + set_gdbarch_deprecated_saved_pc_after_call (gdbarch, rs6000_saved_pc_after_call); - /* We can't tell how many args there are - now that the C compiler delays popping them. */ - set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); + /* Helpers for function argument information. */ + set_gdbarch_fetch_pointer_argument (gdbarch, rs6000_fetch_pointer_argument); /* Hook in ABI-specific overrides, if they have been registered. */ - gdbarch_init_osabi (info, gdbarch, osabi); + gdbarch_init_osabi (info, gdbarch); + + if (from_xcoff_exec) + { + /* NOTE: jimix/2003-06-09: This test should really check for + GDB_OSABI_AIX when that is defined and becomes + available. (Actually, once things are properly split apart, + the test goes away.) */ + /* RS6000/AIX does not support PT_STEP. Has to be simulated. */ + set_gdbarch_software_single_step (gdbarch, rs6000_software_single_step); + } return gdbarch; } @@ -2968,8 +2953,7 @@ rs6000_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) if (tdep == NULL) return; - fprintf_unfiltered (file, "rs6000_dump_tdep: OS ABI = %s\n", - gdbarch_osabi_name (tdep->osabi)); + /* FIXME: Dump gdbarch_tdep. */ } static struct cmd_list_element *info_powerpc_cmdlist = NULL; @@ -2982,6 +2966,8 @@ rs6000_info_powerpc_command (char *args, int from_tty) /* Initialization code. */ +extern initialize_file_ftype _initialize_rs6000_tdep; /* -Wmissing-prototypes */ + void _initialize_rs6000_tdep (void) {