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Diffstat (limited to 'gdb/ia64-tdep.c')
| -rw-r--r-- | gdb/ia64-tdep.c | 2258 |
1 files changed, 0 insertions, 2258 deletions
diff --git a/gdb/ia64-tdep.c b/gdb/ia64-tdep.c deleted file mode 100644 index 1874194..0000000 --- a/gdb/ia64-tdep.c +++ /dev/null @@ -1,2258 +0,0 @@ -/* Target-dependent code for the IA-64 for GDB, the GNU debugger. - - Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include "inferior.h" -#include "symfile.h" /* for entry_point_address */ -#include "gdbcore.h" -#include "arch-utils.h" -#include "floatformat.h" -#include "regcache.h" -#include "doublest.h" -#include "value.h" - -#include "objfiles.h" -#include "elf/common.h" /* for DT_PLTGOT value */ -#include "elf-bfd.h" - -/* Hook for determining the global pointer when calling functions in - the inferior under AIX. The initialization code in ia64-aix-nat.c - sets this hook to the address of a function which will find the - global pointer for a given address. - - The generic code which uses the dynamic section in the inferior for - finding the global pointer is not of much use on AIX since the - values obtained from the inferior have not been relocated. */ - -CORE_ADDR (*native_find_global_pointer) (CORE_ADDR) = 0; - -/* An enumeration of the different IA-64 instruction types. */ - -typedef enum instruction_type -{ - A, /* Integer ALU ; I-unit or M-unit */ - I, /* Non-ALU integer; I-unit */ - M, /* Memory ; M-unit */ - F, /* Floating-point ; F-unit */ - B, /* Branch ; B-unit */ - L, /* Extended (L+X) ; I-unit */ - X, /* Extended (L+X) ; I-unit */ - undefined /* undefined or reserved */ -} instruction_type; - -/* We represent IA-64 PC addresses as the value of the instruction - pointer or'd with some bit combination in the low nibble which - represents the slot number in the bundle addressed by the - instruction pointer. The problem is that the Linux kernel - multiplies its slot numbers (for exceptions) by one while the - disassembler multiplies its slot numbers by 6. In addition, I've - heard it said that the simulator uses 1 as the multiplier. - - I've fixed the disassembler so that the bytes_per_line field will - be the slot multiplier. If bytes_per_line comes in as zero, it - is set to six (which is how it was set up initially). -- objdump - displays pretty disassembly dumps with this value. For our purposes, - we'll set bytes_per_line to SLOT_MULTIPLIER. This is okay since we - never want to also display the raw bytes the way objdump does. */ - -#define SLOT_MULTIPLIER 1 - -/* Length in bytes of an instruction bundle */ - -#define BUNDLE_LEN 16 - -/* FIXME: These extern declarations should go in ia64-tdep.h. */ -extern CORE_ADDR ia64_linux_sigcontext_register_address (CORE_ADDR, int); -extern CORE_ADDR ia64_aix_sigcontext_register_address (CORE_ADDR, int); - -static gdbarch_init_ftype ia64_gdbarch_init; - -static gdbarch_register_name_ftype ia64_register_name; -static gdbarch_register_raw_size_ftype ia64_register_raw_size; -static gdbarch_register_virtual_size_ftype ia64_register_virtual_size; -static gdbarch_register_virtual_type_ftype ia64_register_virtual_type; -static gdbarch_register_byte_ftype ia64_register_byte; -static gdbarch_breakpoint_from_pc_ftype ia64_breakpoint_from_pc; -static gdbarch_frame_chain_ftype ia64_frame_chain; -static gdbarch_frame_saved_pc_ftype ia64_frame_saved_pc; -static gdbarch_skip_prologue_ftype ia64_skip_prologue; -static gdbarch_frame_init_saved_regs_ftype ia64_frame_init_saved_regs; -static gdbarch_get_saved_register_ftype ia64_get_saved_register; -static gdbarch_deprecated_extract_return_value_ftype ia64_extract_return_value; -static gdbarch_deprecated_extract_struct_value_address_ftype ia64_extract_struct_value_address; -static gdbarch_use_struct_convention_ftype ia64_use_struct_convention; -static gdbarch_frameless_function_invocation_ftype ia64_frameless_function_invocation; -static gdbarch_init_extra_frame_info_ftype ia64_init_extra_frame_info; -static gdbarch_store_struct_return_ftype ia64_store_struct_return; -static gdbarch_push_arguments_ftype ia64_push_arguments; -static gdbarch_push_return_address_ftype ia64_push_return_address; -static gdbarch_pop_frame_ftype ia64_pop_frame; -static gdbarch_saved_pc_after_call_ftype ia64_saved_pc_after_call; -static void ia64_pop_frame_regular (struct frame_info *frame); -static struct type *is_float_or_hfa_type (struct type *t); - -static int ia64_num_regs = 590; - -static int pc_regnum = IA64_IP_REGNUM; -static int sp_regnum = IA64_GR12_REGNUM; -static int fp_regnum = IA64_VFP_REGNUM; -static int lr_regnum = IA64_VRAP_REGNUM; - -static LONGEST ia64_call_dummy_words[] = {0}; - -/* Array of register names; There should be ia64_num_regs strings in - the initializer. */ - -static char *ia64_register_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", - "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39", - "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47", - "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55", - "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63", - "r64", "r65", "r66", "r67", "r68", "r69", "r70", "r71", - "r72", "r73", "r74", "r75", "r76", "r77", "r78", "r79", - "r80", "r81", "r82", "r83", "r84", "r85", "r86", "r87", - "r88", "r89", "r90", "r91", "r92", "r93", "r94", "r95", - "r96", "r97", "r98", "r99", "r100", "r101", "r102", "r103", - "r104", "r105", "r106", "r107", "r108", "r109", "r110", "r111", - "r112", "r113", "r114", "r115", "r116", "r117", "r118", "r119", - "r120", "r121", "r122", "r123", "r124", "r125", "r126", "r127", - - "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", - "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", - "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", - "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", - "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39", - "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47", - "f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55", - "f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63", - "f64", "f65", "f66", "f67", "f68", "f69", "f70", "f71", - "f72", "f73", "f74", "f75", "f76", "f77", "f78", "f79", - "f80", "f81", "f82", "f83", "f84", "f85", "f86", "f87", - "f88", "f89", "f90", "f91", "f92", "f93", "f94", "f95", - "f96", "f97", "f98", "f99", "f100", "f101", "f102", "f103", - "f104", "f105", "f106", "f107", "f108", "f109", "f110", "f111", - "f112", "f113", "f114", "f115", "f116", "f117", "f118", "f119", - "f120", "f121", "f122", "f123", "f124", "f125", "f126", "f127", - - "p0", "p1", "p2", "p3", "p4", "p5", "p6", "p7", - "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15", - "p16", "p17", "p18", "p19", "p20", "p21", "p22", "p23", - "p24", "p25", "p26", "p27", "p28", "p29", "p30", "p31", - "p32", "p33", "p34", "p35", "p36", "p37", "p38", "p39", - "p40", "p41", "p42", "p43", "p44", "p45", "p46", "p47", - "p48", "p49", "p50", "p51", "p52", "p53", "p54", "p55", - "p56", "p57", "p58", "p59", "p60", "p61", "p62", "p63", - - "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7", - - "vfp", "vrap", - - "pr", "ip", "psr", "cfm", - - "kr0", "kr1", "kr2", "kr3", "kr4", "kr5", "kr6", "kr7", - "", "", "", "", "", "", "", "", - "rsc", "bsp", "bspstore", "rnat", - "", "fcr", "", "", - "eflag", "csd", "ssd", "cflg", "fsr", "fir", "fdr", "", - "ccv", "", "", "", "unat", "", "", "", - "fpsr", "", "", "", "itc", - "", "", "", "", "", "", "", "", "", "", - "", "", "", "", "", "", "", "", "", - "pfs", "lc", "ec", - "", "", "", "", "", "", "", "", "", "", - "", "", "", "", "", "", "", "", "", "", - "", "", "", "", "", "", "", "", "", "", - "", "", "", "", "", "", "", "", "", "", - "", "", "", "", "", "", "", "", "", "", - "", "", "", "", "", "", "", "", "", "", - "", - "nat0", "nat1", "nat2", "nat3", "nat4", "nat5", "nat6", "nat7", - "nat8", "nat9", "nat10", "nat11", "nat12", "nat13", "nat14", "nat15", - "nat16", "nat17", "nat18", "nat19", "nat20", "nat21", "nat22", "nat23", - "nat24", "nat25", "nat26", "nat27", "nat28", "nat29", "nat30", "nat31", - "nat32", "nat33", "nat34", "nat35", "nat36", "nat37", "nat38", "nat39", - "nat40", "nat41", "nat42", "nat43", "nat44", "nat45", "nat46", "nat47", - "nat48", "nat49", "nat50", "nat51", "nat52", "nat53", "nat54", "nat55", - "nat56", "nat57", "nat58", "nat59", "nat60", "nat61", "nat62", "nat63", - "nat64", "nat65", "nat66", "nat67", "nat68", "nat69", "nat70", "nat71", - "nat72", "nat73", "nat74", "nat75", "nat76", "nat77", "nat78", "nat79", - "nat80", "nat81", "nat82", "nat83", "nat84", "nat85", "nat86", "nat87", - "nat88", "nat89", "nat90", "nat91", "nat92", "nat93", "nat94", "nat95", - "nat96", "nat97", "nat98", "nat99", "nat100","nat101","nat102","nat103", - "nat104","nat105","nat106","nat107","nat108","nat109","nat110","nat111", - "nat112","nat113","nat114","nat115","nat116","nat117","nat118","nat119", - "nat120","nat121","nat122","nat123","nat124","nat125","nat126","nat127", -}; - -struct frame_extra_info - { - CORE_ADDR bsp; /* points at r32 for the current frame */ - CORE_ADDR cfm; /* cfm value for current frame */ - int sof; /* Size of frame (decoded from cfm value) */ - int sol; /* Size of locals (decoded from cfm value) */ - CORE_ADDR after_prologue; - /* Address of first instruction after the last - prologue instruction; Note that there may - be instructions from the function's body - intermingled with the prologue. */ - int mem_stack_frame_size; - /* Size of the memory stack frame (may be zero), - or -1 if it has not been determined yet. */ - int fp_reg; /* Register number (if any) used a frame pointer - for this frame. 0 if no register is being used - as the frame pointer. */ - }; - -struct gdbarch_tdep - { - int os_ident; /* From the ELF header, one of the ELFOSABI_ - constants: ELFOSABI_LINUX, ELFOSABI_AIX, - etc. */ - CORE_ADDR (*sigcontext_register_address) (CORE_ADDR, int); - /* OS specific function which, given a frame address - and register number, returns the offset to the - given register from the start of the frame. */ - CORE_ADDR (*find_global_pointer) (CORE_ADDR); - }; - -#define SIGCONTEXT_REGISTER_ADDRESS \ - (gdbarch_tdep (current_gdbarch)->sigcontext_register_address) -#define FIND_GLOBAL_POINTER \ - (gdbarch_tdep (current_gdbarch)->find_global_pointer) - -static const char * -ia64_register_name (int reg) -{ - return ia64_register_names[reg]; -} - -int -ia64_register_raw_size (int reg) -{ - return (IA64_FR0_REGNUM <= reg && reg <= IA64_FR127_REGNUM) ? 16 : 8; -} - -int -ia64_register_virtual_size (int reg) -{ - return (IA64_FR0_REGNUM <= reg && reg <= IA64_FR127_REGNUM) ? 16 : 8; -} - -/* Return true iff register N's virtual format is different from - its raw format. */ -int -ia64_register_convertible (int nr) -{ - return (IA64_FR0_REGNUM <= nr && nr <= IA64_FR127_REGNUM); -} - -const struct floatformat floatformat_ia64_ext = -{ - floatformat_little, 82, 0, 1, 17, 65535, 0x1ffff, 18, 64, - floatformat_intbit_yes -}; - -void -ia64_register_convert_to_virtual (int regnum, struct type *type, - char *from, char *to) -{ - if (regnum >= IA64_FR0_REGNUM && regnum <= IA64_FR127_REGNUM) - { - DOUBLEST val; - floatformat_to_doublest (&floatformat_ia64_ext, from, &val); - store_floating(to, TYPE_LENGTH(type), val); - } - else - error("ia64_register_convert_to_virtual called with non floating point register number"); -} - -void -ia64_register_convert_to_raw (struct type *type, int regnum, - char *from, char *to) -{ - if (regnum >= IA64_FR0_REGNUM && regnum <= IA64_FR127_REGNUM) - { - DOUBLEST val = extract_floating (from, TYPE_LENGTH(type)); - floatformat_from_doublest (&floatformat_ia64_ext, &val, to); - } - else - error("ia64_register_convert_to_raw called with non floating point register number"); -} - -struct type * -ia64_register_virtual_type (int reg) -{ - if (reg >= IA64_FR0_REGNUM && reg <= IA64_FR127_REGNUM) - return builtin_type_long_double; - else - return builtin_type_long; -} - -int -ia64_register_byte (int reg) -{ - return (8 * reg) + - (reg <= IA64_FR0_REGNUM ? 0 : 8 * ((reg > IA64_FR127_REGNUM) ? 128 : reg - IA64_FR0_REGNUM)); -} - -/* Read the given register from a sigcontext structure in the - specified frame. */ - -static CORE_ADDR -read_sigcontext_register (struct frame_info *frame, int regnum) -{ - CORE_ADDR regaddr; - - if (frame == NULL) - internal_error (__FILE__, __LINE__, - "read_sigcontext_register: NULL frame"); - if (!frame->signal_handler_caller) - internal_error (__FILE__, __LINE__, - "read_sigcontext_register: frame not a signal_handler_caller"); - if (SIGCONTEXT_REGISTER_ADDRESS == 0) - internal_error (__FILE__, __LINE__, - "read_sigcontext_register: SIGCONTEXT_REGISTER_ADDRESS is 0"); - - regaddr = SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regnum); - if (regaddr) - return read_memory_integer (regaddr, REGISTER_RAW_SIZE (regnum)); - else - internal_error (__FILE__, __LINE__, - "read_sigcontext_register: Register %d not in struct sigcontext", regnum); -} - -/* Extract ``len'' bits from an instruction bundle starting at - bit ``from''. */ - -static long long -extract_bit_field (char *bundle, int from, int len) -{ - long long result = 0LL; - int to = from + len; - int from_byte = from / 8; - int to_byte = to / 8; - unsigned char *b = (unsigned char *) bundle; - unsigned char c; - int lshift; - int i; - - c = b[from_byte]; - if (from_byte == to_byte) - c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8); - result = c >> (from % 8); - lshift = 8 - (from % 8); - - for (i = from_byte+1; i < to_byte; i++) - { - result |= ((long long) b[i]) << lshift; - lshift += 8; - } - - if (from_byte < to_byte && (to % 8 != 0)) - { - c = b[to_byte]; - c = ((unsigned char) (c << (8 - to % 8))) >> (8 - to % 8); - result |= ((long long) c) << lshift; - } - - return result; -} - -/* Replace the specified bits in an instruction bundle */ - -static void -replace_bit_field (char *bundle, long long val, int from, int len) -{ - int to = from + len; - int from_byte = from / 8; - int to_byte = to / 8; - unsigned char *b = (unsigned char *) bundle; - unsigned char c; - - if (from_byte == to_byte) - { - unsigned char left, right; - c = b[from_byte]; - left = (c >> (to % 8)) << (to % 8); - right = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8); - c = (unsigned char) (val & 0xff); - c = (unsigned char) (c << (from % 8 + 8 - to % 8)) >> (8 - to % 8); - c |= right | left; - b[from_byte] = c; - } - else - { - int i; - c = b[from_byte]; - c = ((unsigned char) (c << (8 - from % 8))) >> (8 - from % 8); - c = c | (val << (from % 8)); - b[from_byte] = c; - val >>= 8 - from % 8; - - for (i = from_byte+1; i < to_byte; i++) - { - c = val & 0xff; - val >>= 8; - b[i] = c; - } - - if (to % 8 != 0) - { - unsigned char cv = (unsigned char) val; - c = b[to_byte]; - c = c >> (to % 8) << (to % 8); - c |= ((unsigned char) (cv << (8 - to % 8))) >> (8 - to % 8); - b[to_byte] = c; - } - } -} - -/* Return the contents of slot N (for N = 0, 1, or 2) in - and instruction bundle */ - -static long long -slotN_contents (char *bundle, int slotnum) -{ - return extract_bit_field (bundle, 5+41*slotnum, 41); -} - -/* Store an instruction in an instruction bundle */ - -static void -replace_slotN_contents (char *bundle, long long instr, int slotnum) -{ - replace_bit_field (bundle, instr, 5+41*slotnum, 41); -} - -static enum instruction_type template_encoding_table[32][3] = -{ - { M, I, I }, /* 00 */ - { M, I, I }, /* 01 */ - { M, I, I }, /* 02 */ - { M, I, I }, /* 03 */ - { M, L, X }, /* 04 */ - { M, L, X }, /* 05 */ - { undefined, undefined, undefined }, /* 06 */ - { undefined, undefined, undefined }, /* 07 */ - { M, M, I }, /* 08 */ - { M, M, I }, /* 09 */ - { M, M, I }, /* 0A */ - { M, M, I }, /* 0B */ - { M, F, I }, /* 0C */ - { M, F, I }, /* 0D */ - { M, M, F }, /* 0E */ - { M, M, F }, /* 0F */ - { M, I, B }, /* 10 */ - { M, I, B }, /* 11 */ - { M, B, B }, /* 12 */ - { M, B, B }, /* 13 */ - { undefined, undefined, undefined }, /* 14 */ - { undefined, undefined, undefined }, /* 15 */ - { B, B, B }, /* 16 */ - { B, B, B }, /* 17 */ - { M, M, B }, /* 18 */ - { M, M, B }, /* 19 */ - { undefined, undefined, undefined }, /* 1A */ - { undefined, undefined, undefined }, /* 1B */ - { M, F, B }, /* 1C */ - { M, F, B }, /* 1D */ - { undefined, undefined, undefined }, /* 1E */ - { undefined, undefined, undefined }, /* 1F */ -}; - -/* Fetch and (partially) decode an instruction at ADDR and return the - address of the next instruction to fetch. */ - -static CORE_ADDR -fetch_instruction (CORE_ADDR addr, instruction_type *it, long long *instr) -{ - char bundle[BUNDLE_LEN]; - int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER; - long long template; - int val; - - /* Warn about slot numbers greater than 2. We used to generate - an error here on the assumption that the user entered an invalid - address. But, sometimes GDB itself requests an invalid address. - This can (easily) happen when execution stops in a function for - which there are no symbols. The prologue scanner will attempt to - find the beginning of the function - if the nearest symbol - happens to not be aligned on a bundle boundary (16 bytes), the - resulting starting address will cause GDB to think that the slot - number is too large. - - So we warn about it and set the slot number to zero. It is - not necessarily a fatal condition, particularly if debugging - at the assembly language level. */ - if (slotnum > 2) - { - warning ("Can't fetch instructions for slot numbers greater than 2.\n" - "Using slot 0 instead"); - slotnum = 0; - } - - addr &= ~0x0f; - - val = target_read_memory (addr, bundle, BUNDLE_LEN); - - if (val != 0) - return 0; - - *instr = slotN_contents (bundle, slotnum); - template = extract_bit_field (bundle, 0, 5); - *it = template_encoding_table[(int)template][slotnum]; - - if (slotnum == 2 || (slotnum == 1 && *it == L)) - addr += 16; - else - addr += (slotnum + 1) * SLOT_MULTIPLIER; - - return addr; -} - -/* There are 5 different break instructions (break.i, break.b, - break.m, break.f, and break.x), but they all have the same - encoding. (The five bit template in the low five bits of the - instruction bundle distinguishes one from another.) - - The runtime architecture manual specifies that break instructions - used for debugging purposes must have the upper two bits of the 21 - bit immediate set to a 0 and a 1 respectively. A breakpoint - instruction encodes the most significant bit of its 21 bit - immediate at bit 36 of the 41 bit instruction. The penultimate msb - is at bit 25 which leads to the pattern below. - - Originally, I had this set up to do, e.g, a "break.i 0x80000" But - it turns out that 0x80000 was used as the syscall break in the early - simulators. So I changed the pattern slightly to do "break.i 0x080001" - instead. But that didn't work either (I later found out that this - pattern was used by the simulator that I was using.) So I ended up - using the pattern seen below. */ - -#if 0 -#define BREAKPOINT 0x00002000040LL -#endif -#define BREAKPOINT 0x00003333300LL - -static int -ia64_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache) -{ - char bundle[BUNDLE_LEN]; - int slotnum = (int) (addr & 0x0f) / SLOT_MULTIPLIER; - long long instr; - int val; - int template; - - if (slotnum > 2) - error("Can't insert breakpoint for slot numbers greater than 2."); - - addr &= ~0x0f; - - val = target_read_memory (addr, bundle, BUNDLE_LEN); - - /* Check for L type instruction in 2nd slot, if present then - bump up the slot number to the 3rd slot */ - template = extract_bit_field (bundle, 0, 5); - if (slotnum == 1 && template_encoding_table[template][1] == L) - { - slotnum = 2; - } - - instr = slotN_contents (bundle, slotnum); - memcpy(contents_cache, &instr, sizeof(instr)); - replace_slotN_contents (bundle, BREAKPOINT, slotnum); - if (val == 0) - target_write_memory (addr, bundle, BUNDLE_LEN); - - return val; -} - -static int -ia64_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache) -{ - char bundle[BUNDLE_LEN]; - int slotnum = (addr & 0x0f) / SLOT_MULTIPLIER; - long long instr; - int val; - int template; - - addr &= ~0x0f; - - val = target_read_memory (addr, bundle, BUNDLE_LEN); - - /* Check for L type instruction in 2nd slot, if present then - bump up the slot number to the 3rd slot */ - template = extract_bit_field (bundle, 0, 5); - if (slotnum == 1 && template_encoding_table[template][1] == L) - { - slotnum = 2; - } - - memcpy (&instr, contents_cache, sizeof instr); - replace_slotN_contents (bundle, instr, slotnum); - if (val == 0) - target_write_memory (addr, bundle, BUNDLE_LEN); - - return val; -} - -/* We don't really want to use this, but remote.c needs to call it in order - to figure out if Z-packets are supported or not. Oh, well. */ -const unsigned char * -ia64_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) -{ - static unsigned char breakpoint[] = - { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; - *lenptr = sizeof (breakpoint); -#if 0 - *pcptr &= ~0x0f; -#endif - return breakpoint; -} - -CORE_ADDR -ia64_read_pc (ptid_t ptid) -{ - CORE_ADDR psr_value = read_register_pid (IA64_PSR_REGNUM, ptid); - CORE_ADDR pc_value = read_register_pid (IA64_IP_REGNUM, ptid); - int slot_num = (psr_value >> 41) & 3; - - return pc_value | (slot_num * SLOT_MULTIPLIER); -} - -void -ia64_write_pc (CORE_ADDR new_pc, ptid_t ptid) -{ - int slot_num = (int) (new_pc & 0xf) / SLOT_MULTIPLIER; - CORE_ADDR psr_value = read_register_pid (IA64_PSR_REGNUM, ptid); - psr_value &= ~(3LL << 41); - psr_value |= (CORE_ADDR)(slot_num & 0x3) << 41; - - new_pc &= ~0xfLL; - - write_register_pid (IA64_PSR_REGNUM, psr_value, ptid); - write_register_pid (IA64_IP_REGNUM, new_pc, ptid); -} - -#define IS_NaT_COLLECTION_ADDR(addr) ((((addr) >> 3) & 0x3f) == 0x3f) - -/* Returns the address of the slot that's NSLOTS slots away from - the address ADDR. NSLOTS may be positive or negative. */ -static CORE_ADDR -rse_address_add(CORE_ADDR addr, int nslots) -{ - CORE_ADDR new_addr; - int mandatory_nat_slots = nslots / 63; - int direction = nslots < 0 ? -1 : 1; - - new_addr = addr + 8 * (nslots + mandatory_nat_slots); - - if ((new_addr >> 9) != ((addr + 8 * 64 * mandatory_nat_slots) >> 9)) - new_addr += 8 * direction; - - if (IS_NaT_COLLECTION_ADDR(new_addr)) - new_addr += 8 * direction; - - return new_addr; -} - -/* The IA-64 frame chain is a bit odd. We won't always have a frame - pointer, so we use the SP value as the FP for the purpose of - creating a frame. There is sometimes a register (not fixed) which - is used as a frame pointer. When this register exists, it is not - especially hard to determine which one is being used. It isn't - even really hard to compute the frame chain, but it can be - computationally expensive. So, instead of making life difficult - (and slow), we pick a more convenient representation of the frame - chain, knowing that we'll have to make some small adjustments in - other places. (E.g, note that read_fp() is actually read_sp() in - ia64_gdbarch_init() below.) - - Okay, so what is the frame chain exactly? It'll be the SP value - at the time that the function in question was entered. - - Note that this *should* actually the frame pointer for the current - function! But as I note above, if we were to attempt to find the - address of the beginning of the previous frame, we'd waste a lot - of cycles for no good reason. So instead, we simply choose to - represent the frame chain as the end of the previous frame instead - of the beginning. */ - -CORE_ADDR -ia64_frame_chain (struct frame_info *frame) -{ - if (frame->signal_handler_caller) - return read_sigcontext_register (frame, sp_regnum); - else if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) - return frame->frame; - else - { - FRAME_INIT_SAVED_REGS (frame); - if (frame->saved_regs[IA64_VFP_REGNUM]) - return read_memory_integer (frame->saved_regs[IA64_VFP_REGNUM], 8); - else - return frame->frame + frame->extra_info->mem_stack_frame_size; - } -} - -CORE_ADDR -ia64_frame_saved_pc (struct frame_info *frame) -{ - if (frame->signal_handler_caller) - return read_sigcontext_register (frame, pc_regnum); - else if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) - return generic_read_register_dummy (frame->pc, frame->frame, pc_regnum); - else - { - FRAME_INIT_SAVED_REGS (frame); - - if (frame->saved_regs[IA64_VRAP_REGNUM]) - return read_memory_integer (frame->saved_regs[IA64_VRAP_REGNUM], 8); - else if (frame->next && frame->next->signal_handler_caller) - return read_sigcontext_register (frame->next, IA64_BR0_REGNUM); - else /* either frameless, or not far enough along in the prologue... */ - return ia64_saved_pc_after_call (frame); - } -} - -/* Limit the number of skipped non-prologue instructions since examining - of the prologue is expensive. */ -static int max_skip_non_prologue_insns = 10; - -/* Given PC representing the starting address of a function, and - LIM_PC which is the (sloppy) limit to which to scan when looking - for a prologue, attempt to further refine this limit by using - 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. TRUST_LIMIT is a pointer to a flag - which will be set to indicate whether the returned limit may be - used with no further scanning in the event that the function is - frameless. */ - -static CORE_ADDR -refine_prologue_limit (CORE_ADDR pc, CORE_ADDR lim_pc, int *trust_limit) -{ - struct symtab_and_line prologue_sal; - CORE_ADDR start_pc = pc; - - /* Start off not trusting the limit. */ - *trust_limit = 0; - - prologue_sal = find_pc_line (pc, 0); - if (prologue_sal.line != 0) - { - int i; - CORE_ADDR addr = prologue_sal.end; - - /* Handle the case in which compiler's optimizer/scheduler - has moved instructions into the prologue. We scan ahead - in the function looking for address ranges whose corresponding - line number is less than or equal to the first one that we - found for the function. (It can be less than when the - scheduler puts a body instruction before the first prologue - instruction.) */ - for (i = 2 * max_skip_non_prologue_insns; - i > 0 && (lim_pc == 0 || addr < lim_pc); - i--) - { - struct symtab_and_line sal; - - sal = find_pc_line (addr, 0); - if (sal.line == 0) - break; - if (sal.line <= prologue_sal.line - && sal.symtab == prologue_sal.symtab) - { - prologue_sal = sal; - } - addr = sal.end; - } - - if (lim_pc == 0 || prologue_sal.end < lim_pc) - { - lim_pc = prologue_sal.end; - if (start_pc == get_pc_function_start (lim_pc)) - *trust_limit = 1; - } - } - return lim_pc; -} - -#define isScratch(_regnum_) ((_regnum_) == 2 || (_regnum_) == 3 \ - || (8 <= (_regnum_) && (_regnum_) <= 11) \ - || (14 <= (_regnum_) && (_regnum_) <= 31)) -#define imm9(_instr_) \ - ( ((((_instr_) & 0x01000000000LL) ? -1 : 0) << 8) \ - | (((_instr_) & 0x00008000000LL) >> 20) \ - | (((_instr_) & 0x00000001fc0LL) >> 6)) - -static CORE_ADDR -examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct frame_info *frame) -{ - CORE_ADDR next_pc; - CORE_ADDR last_prologue_pc = pc; - instruction_type it; - long long instr; - int do_fsr_stuff = 0; - - int cfm_reg = 0; - int ret_reg = 0; - int fp_reg = 0; - int unat_save_reg = 0; - int pr_save_reg = 0; - int mem_stack_frame_size = 0; - int spill_reg = 0; - CORE_ADDR spill_addr = 0; - char instores[8]; - char infpstores[8]; - int trust_limit; - - memset (instores, 0, sizeof instores); - memset (infpstores, 0, sizeof infpstores); - - if (frame && !frame->saved_regs) - { - frame_saved_regs_zalloc (frame); - do_fsr_stuff = 1; - } - - if (frame - && !do_fsr_stuff - && frame->extra_info->after_prologue != 0 - && frame->extra_info->after_prologue <= lim_pc) - return frame->extra_info->after_prologue; - - lim_pc = refine_prologue_limit (pc, lim_pc, &trust_limit); - - /* Must start with an alloc instruction */ - next_pc = fetch_instruction (pc, &it, &instr); - if (pc < lim_pc && next_pc - && it == M && ((instr & 0x1ee0000003fLL) == 0x02c00000000LL)) - { - /* alloc */ - int sor = (int) ((instr & 0x00078000000LL) >> 27); - int sol = (int) ((instr & 0x00007f00000LL) >> 20); - int sof = (int) ((instr & 0x000000fe000LL) >> 13); - /* Okay, so sor, sol, and sof aren't used right now; but perhaps - we could compare against the size given to us via the cfm as - either a sanity check or possibly to see if the frame has been - changed by a later alloc instruction... */ - int rN = (int) ((instr & 0x00000001fc0LL) >> 6); - cfm_reg = rN; - last_prologue_pc = next_pc; - pc = next_pc; - } - else - { - pc = lim_pc; /* Frameless: We're done early. */ - if (trust_limit) - last_prologue_pc = lim_pc; - } - - /* Loop, looking for prologue instructions, keeping track of - where preserved registers were spilled. */ - while (pc < lim_pc) - { - next_pc = fetch_instruction (pc, &it, &instr); - if (next_pc == 0) - break; - - if ((it == B && ((instr & 0x1e1f800003f) != 0x04000000000)) - || ((instr & 0x3fLL) != 0LL)) - { - /* Exit loop upon hitting a non-nop branch instruction - or a predicated instruction. */ - break; - } - else if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL)) - { - /* Move from BR */ - int b2 = (int) ((instr & 0x0000000e000LL) >> 13); - int rN = (int) ((instr & 0x00000001fc0LL) >> 6); - int qp = (int) (instr & 0x0000000003f); - - if (qp == 0 && b2 == 0 && rN >= 32 && ret_reg == 0) - { - ret_reg = rN; - last_prologue_pc = next_pc; - } - } - else if ((it == I || it == M) - && ((instr & 0x1ee00000000LL) == 0x10800000000LL)) - { - /* adds rN = imm14, rM (or mov rN, rM when imm14 is 0) */ - int imm = (int) ((((instr & 0x01000000000LL) ? -1 : 0) << 13) - | ((instr & 0x001f8000000LL) >> 20) - | ((instr & 0x000000fe000LL) >> 13)); - int rM = (int) ((instr & 0x00007f00000LL) >> 20); - int rN = (int) ((instr & 0x00000001fc0LL) >> 6); - int qp = (int) (instr & 0x0000000003fLL); - - if (qp == 0 && rN >= 32 && imm == 0 && rM == 12 && fp_reg == 0) - { - /* mov rN, r12 */ - fp_reg = rN; - last_prologue_pc = next_pc; - } - else if (qp == 0 && rN == 12 && rM == 12) - { - /* adds r12, -mem_stack_frame_size, r12 */ - mem_stack_frame_size -= imm; - last_prologue_pc = next_pc; - } - else if (qp == 0 && rN == 2 - && ((rM == fp_reg && fp_reg != 0) || rM == 12)) - { - /* adds r2, spilloffset, rFramePointer - or - adds r2, spilloffset, r12 - - Get ready for stf.spill or st8.spill instructions. - The address to start spilling at is loaded into r2. - FIXME: Why r2? That's what gcc currently uses; it - could well be different for other compilers. */ - - /* Hmm... whether or not this will work will depend on - where the pc is. If it's still early in the prologue - this'll be wrong. FIXME */ - spill_addr = (frame ? frame->frame : 0) - + (rM == 12 ? 0 : mem_stack_frame_size) - + imm; - spill_reg = rN; - last_prologue_pc = next_pc; - } - } - else if (it == M - && ( ((instr & 0x1efc0000000LL) == 0x0eec0000000LL) - || ((instr & 0x1ffc8000000LL) == 0x0cec0000000LL) )) - { - /* stf.spill [rN] = fM, imm9 - or - stf.spill [rN] = fM */ - - int imm = imm9(instr); - int rN = (int) ((instr & 0x00007f00000LL) >> 20); - int fM = (int) ((instr & 0x000000fe000LL) >> 13); - int qp = (int) (instr & 0x0000000003fLL); - if (qp == 0 && rN == spill_reg && spill_addr != 0 - && ((2 <= fM && fM <= 5) || (16 <= fM && fM <= 31))) - { - if (do_fsr_stuff) - frame->saved_regs[IA64_FR0_REGNUM + fM] = spill_addr; - - if ((instr & 0x1efc0000000) == 0x0eec0000000) - spill_addr += imm; - else - spill_addr = 0; /* last one; must be done */ - last_prologue_pc = next_pc; - } - } - else if ((it == M && ((instr & 0x1eff8000000LL) == 0x02110000000LL)) - || (it == I && ((instr & 0x1eff8000000LL) == 0x00050000000LL)) ) - { - /* mov.m rN = arM - or - mov.i rN = arM */ - - int arM = (int) ((instr & 0x00007f00000LL) >> 20); - int rN = (int) ((instr & 0x00000001fc0LL) >> 6); - int qp = (int) (instr & 0x0000000003fLL); - if (qp == 0 && isScratch (rN) && arM == 36 /* ar.unat */) - { - /* We have something like "mov.m r3 = ar.unat". Remember the - r3 (or whatever) and watch for a store of this register... */ - unat_save_reg = rN; - last_prologue_pc = next_pc; - } - } - else if (it == I && ((instr & 0x1eff8000000LL) == 0x00198000000LL)) - { - /* mov rN = pr */ - int rN = (int) ((instr & 0x00000001fc0LL) >> 6); - int qp = (int) (instr & 0x0000000003fLL); - if (qp == 0 && isScratch (rN)) - { - pr_save_reg = rN; - last_prologue_pc = next_pc; - } - } - else if (it == M - && ( ((instr & 0x1ffc8000000LL) == 0x08cc0000000LL) - || ((instr & 0x1efc0000000LL) == 0x0acc0000000LL))) - { - /* st8 [rN] = rM - or - st8 [rN] = rM, imm9 */ - int rN = (int) ((instr & 0x00007f00000LL) >> 20); - int rM = (int) ((instr & 0x000000fe000LL) >> 13); - int qp = (int) (instr & 0x0000000003fLL); - if (qp == 0 && rN == spill_reg && spill_addr != 0 - && (rM == unat_save_reg || rM == pr_save_reg)) - { - /* We've found a spill of either the UNAT register or the PR - register. (Well, not exactly; what we've actually found is - a spill of the register that UNAT or PR was moved to). - Record that fact and move on... */ - if (rM == unat_save_reg) - { - /* Track UNAT register */ - if (do_fsr_stuff) - frame->saved_regs[IA64_UNAT_REGNUM] = spill_addr; - unat_save_reg = 0; - } - else - { - /* Track PR register */ - if (do_fsr_stuff) - frame->saved_regs[IA64_PR_REGNUM] = spill_addr; - pr_save_reg = 0; - } - if ((instr & 0x1efc0000000LL) == 0x0acc0000000LL) - /* st8 [rN] = rM, imm9 */ - spill_addr += imm9(instr); - else - spill_addr = 0; /* must be done spilling */ - last_prologue_pc = next_pc; - } - else if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32]) - { - /* Allow up to one store of each input register. */ - instores[rM-32] = 1; - last_prologue_pc = next_pc; - } - } - else if (it == M && ((instr & 0x1ff08000000LL) == 0x08c00000000LL)) - { - /* One of - st1 [rN] = rM - st2 [rN] = rM - st4 [rN] = rM - st8 [rN] = rM - Note that the st8 case is handled in the clause above. - - Advance over stores of input registers. One store per input - register is permitted. */ - int rM = (int) ((instr & 0x000000fe000LL) >> 13); - int qp = (int) (instr & 0x0000000003fLL); - if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32]) - { - instores[rM-32] = 1; - last_prologue_pc = next_pc; - } - } - else if (it == M && ((instr & 0x1ff88000000LL) == 0x0cc80000000LL)) - { - /* Either - stfs [rN] = fM - or - stfd [rN] = fM - - Advance over stores of floating point input registers. Again - one store per register is permitted */ - int fM = (int) ((instr & 0x000000fe000LL) >> 13); - int qp = (int) (instr & 0x0000000003fLL); - if (qp == 0 && 8 <= fM && fM < 16 && !infpstores[fM - 8]) - { - infpstores[fM-8] = 1; - last_prologue_pc = next_pc; - } - } - else if (it == M - && ( ((instr & 0x1ffc8000000LL) == 0x08ec0000000LL) - || ((instr & 0x1efc0000000LL) == 0x0aec0000000LL))) - { - /* st8.spill [rN] = rM - or - st8.spill [rN] = rM, imm9 */ - int rN = (int) ((instr & 0x00007f00000LL) >> 20); - int rM = (int) ((instr & 0x000000fe000LL) >> 13); - int qp = (int) (instr & 0x0000000003fLL); - if (qp == 0 && rN == spill_reg && 4 <= rM && rM <= 7) - { - /* We've found a spill of one of the preserved general purpose - regs. Record the spill address and advance the spill - register if appropriate. */ - if (do_fsr_stuff) - frame->saved_regs[IA64_GR0_REGNUM + rM] = spill_addr; - if ((instr & 0x1efc0000000LL) == 0x0aec0000000LL) - /* st8.spill [rN] = rM, imm9 */ - spill_addr += imm9(instr); - else - spill_addr = 0; /* Done spilling */ - last_prologue_pc = next_pc; - } - } - - pc = next_pc; - } - - if (do_fsr_stuff) { - int i; - CORE_ADDR addr; - int sor, rrb_gr; - - /* Extract the size of the rotating portion of the stack - frame and the register rename base from the current - frame marker. */ - sor = ((frame->extra_info->cfm >> 14) & 0xf) * 8; - rrb_gr = (frame->extra_info->cfm >> 18) & 0x7f; - - for (i = 0, addr = frame->extra_info->bsp; - i < frame->extra_info->sof; - i++, addr += 8) - { - if (IS_NaT_COLLECTION_ADDR (addr)) - { - addr += 8; - } - if (i < sor) - frame->saved_regs[IA64_GR32_REGNUM + ((i + (sor - rrb_gr)) % sor)] - = addr; - else - frame->saved_regs[IA64_GR32_REGNUM + i] = addr; - - if (i+32 == cfm_reg) - frame->saved_regs[IA64_CFM_REGNUM] = addr; - if (i+32 == ret_reg) - frame->saved_regs[IA64_VRAP_REGNUM] = addr; - if (i+32 == fp_reg) - frame->saved_regs[IA64_VFP_REGNUM] = addr; - } - } - - if (frame && frame->extra_info) { - frame->extra_info->after_prologue = last_prologue_pc; - frame->extra_info->mem_stack_frame_size = mem_stack_frame_size; - frame->extra_info->fp_reg = fp_reg; - } - - return last_prologue_pc; -} - -CORE_ADDR -ia64_skip_prologue (CORE_ADDR pc) -{ - return examine_prologue (pc, pc+1024, 0); -} - -void -ia64_frame_init_saved_regs (struct frame_info *frame) -{ - if (frame->saved_regs) - return; - - if (frame->signal_handler_caller && SIGCONTEXT_REGISTER_ADDRESS) - { - int regno; - - frame_saved_regs_zalloc (frame); - - frame->saved_regs[IA64_VRAP_REGNUM] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_IP_REGNUM); - frame->saved_regs[IA64_CFM_REGNUM] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_CFM_REGNUM); - frame->saved_regs[IA64_PSR_REGNUM] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_PSR_REGNUM); -#if 0 - frame->saved_regs[IA64_BSP_REGNUM] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_BSP_REGNUM); -#endif - frame->saved_regs[IA64_RNAT_REGNUM] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_RNAT_REGNUM); - frame->saved_regs[IA64_CCV_REGNUM] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_CCV_REGNUM); - frame->saved_regs[IA64_UNAT_REGNUM] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_UNAT_REGNUM); - frame->saved_regs[IA64_FPSR_REGNUM] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_FPSR_REGNUM); - frame->saved_regs[IA64_PFS_REGNUM] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_PFS_REGNUM); - frame->saved_regs[IA64_LC_REGNUM] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_LC_REGNUM); - for (regno = IA64_GR1_REGNUM; regno <= IA64_GR31_REGNUM; regno++) - if (regno != sp_regnum) - frame->saved_regs[regno] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regno); - for (regno = IA64_BR0_REGNUM; regno <= IA64_BR7_REGNUM; regno++) - frame->saved_regs[regno] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regno); - for (regno = IA64_FR2_REGNUM; regno <= IA64_BR7_REGNUM; regno++) - frame->saved_regs[regno] = - SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regno); - } - else - { - CORE_ADDR func_start; - - func_start = get_pc_function_start (frame->pc); - examine_prologue (func_start, frame->pc, frame); - } -} - -void -ia64_get_saved_register (char *raw_buffer, - int *optimized, - CORE_ADDR *addrp, - struct frame_info *frame, - int regnum, - enum lval_type *lval) -{ - int is_dummy_frame; - - if (!target_has_registers) - error ("No registers."); - - if (optimized != NULL) - *optimized = 0; - - if (addrp != NULL) - *addrp = 0; - - if (lval != NULL) - *lval = not_lval; - - is_dummy_frame = PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame); - - if (regnum == SP_REGNUM && frame->next) - { - /* Handle SP values for all frames but the topmost. */ - store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), frame->frame); - } - else if (regnum == IA64_BSP_REGNUM) - { - store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), - frame->extra_info->bsp); - } - else if (regnum == IA64_VFP_REGNUM) - { - /* If the function in question uses an automatic register (r32-r127) - for the frame pointer, it'll be found by ia64_find_saved_register() - above. If the function lacks one of these frame pointers, we can - still provide a value since we know the size of the frame */ - CORE_ADDR vfp = frame->frame + frame->extra_info->mem_stack_frame_size; - store_address (raw_buffer, REGISTER_RAW_SIZE (IA64_VFP_REGNUM), vfp); - } - else if (IA64_PR0_REGNUM <= regnum && regnum <= IA64_PR63_REGNUM) - { - char *pr_raw_buffer = alloca (MAX_REGISTER_RAW_SIZE); - int pr_optim; - enum lval_type pr_lval; - CORE_ADDR pr_addr; - int prN_val; - ia64_get_saved_register (pr_raw_buffer, &pr_optim, &pr_addr, - frame, IA64_PR_REGNUM, &pr_lval); - if (IA64_PR16_REGNUM <= regnum && regnum <= IA64_PR63_REGNUM) - { - /* Fetch predicate register rename base from current frame - marker for this frame. */ - int rrb_pr = (frame->extra_info->cfm >> 32) & 0x3f; - - /* Adjust the register number to account for register rotation. */ - regnum = IA64_PR16_REGNUM - + ((regnum - IA64_PR16_REGNUM) + rrb_pr) % 48; - } - prN_val = extract_bit_field ((unsigned char *) pr_raw_buffer, - regnum - IA64_PR0_REGNUM, 1); - store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), prN_val); - } - else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM) - { - char *unat_raw_buffer = alloca (MAX_REGISTER_RAW_SIZE); - int unat_optim; - enum lval_type unat_lval; - CORE_ADDR unat_addr; - int unatN_val; - ia64_get_saved_register (unat_raw_buffer, &unat_optim, &unat_addr, - frame, IA64_UNAT_REGNUM, &unat_lval); - unatN_val = extract_bit_field ((unsigned char *) unat_raw_buffer, - regnum - IA64_NAT0_REGNUM, 1); - store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), - unatN_val); - } - else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM) - { - int natval = 0; - /* Find address of general register corresponding to nat bit we're - interested in. */ - CORE_ADDR gr_addr = 0; - - if (!is_dummy_frame) - { - FRAME_INIT_SAVED_REGS (frame); - gr_addr = frame->saved_regs[ regnum - IA64_NAT0_REGNUM - + IA64_GR0_REGNUM]; - } - if (gr_addr) - { - /* Compute address of nat collection bits */ - CORE_ADDR nat_addr = gr_addr | 0x1f8; - CORE_ADDR bsp = read_register (IA64_BSP_REGNUM); - CORE_ADDR nat_collection; - int nat_bit; - /* If our nat collection address is bigger than bsp, we have to get - the nat collection from rnat. Otherwise, we fetch the nat - collection from the computed address. */ - if (nat_addr >= bsp) - nat_collection = read_register (IA64_RNAT_REGNUM); - else - nat_collection = read_memory_integer (nat_addr, 8); - nat_bit = (gr_addr >> 3) & 0x3f; - natval = (nat_collection >> nat_bit) & 1; - } - store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), natval); - } - else if (regnum == IA64_IP_REGNUM) - { - CORE_ADDR pc; - if (frame->next) - { - /* FIXME: Set *addrp, *lval when possible. */ - pc = ia64_frame_saved_pc (frame->next); - } - else - { - pc = read_pc (); - } - store_address (raw_buffer, REGISTER_RAW_SIZE (IA64_IP_REGNUM), pc); - } - else if (IA64_GR32_REGNUM <= regnum && regnum <= IA64_GR127_REGNUM) - { - CORE_ADDR addr = 0; - if (!is_dummy_frame) - { - FRAME_INIT_SAVED_REGS (frame); - addr = frame->saved_regs[regnum]; - } - - if (addr != 0) - { - if (lval != NULL) - *lval = lval_memory; - if (addrp != NULL) - *addrp = addr; - read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum)); - } - else - { - /* r32 - r127 must be fetchable via memory. If they aren't, - then the register is unavailable */ - memset (raw_buffer, 0, REGISTER_RAW_SIZE (regnum)); - } - } - else - { - if (IA64_FR32_REGNUM <= regnum && regnum <= IA64_FR127_REGNUM) - { - /* Fetch floating point register rename base from current - frame marker for this frame. */ - int rrb_fr = (frame->extra_info->cfm >> 25) & 0x7f; - - /* Adjust the floating point register number to account for - register rotation. */ - regnum = IA64_FR32_REGNUM - + ((regnum - IA64_FR32_REGNUM) + rrb_fr) % 96; - } - - generic_get_saved_register (raw_buffer, optimized, addrp, frame, - regnum, lval); - } -} - -/* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of - EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc - and TYPE is the type (which is known to be struct, union or array). */ -int -ia64_use_struct_convention (int gcc_p, struct type *type) -{ - struct type *float_elt_type; - - /* HFAs are structures (or arrays) consisting entirely of floating - point values of the same length. Up to 8 of these are returned - in registers. Don't use the struct convention when this is the - case. */ - float_elt_type = is_float_or_hfa_type (type); - if (float_elt_type != NULL - && TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type) <= 8) - return 0; - - /* Other structs of length 32 or less are returned in r8-r11. - Don't use the struct convention for those either. */ - return TYPE_LENGTH (type) > 32; -} - -void -ia64_extract_return_value (struct type *type, char *regbuf, char *valbuf) -{ - struct type *float_elt_type; - - float_elt_type = is_float_or_hfa_type (type); - if (float_elt_type != NULL) - { - int offset = 0; - int regnum = IA64_FR8_REGNUM; - int n = TYPE_LENGTH (type) / TYPE_LENGTH (float_elt_type); - - while (n-- > 0) - { - ia64_register_convert_to_virtual (regnum, float_elt_type, - ®buf[REGISTER_BYTE (regnum)], valbuf + offset); - offset += TYPE_LENGTH (float_elt_type); - regnum++; - } - } - else - memcpy (valbuf, ®buf[REGISTER_BYTE (IA64_GR8_REGNUM)], - TYPE_LENGTH (type)); -} - -/* FIXME: Turn this into a stack of some sort. Unfortunately, something - like this is necessary though since the IA-64 calling conventions specify - that r8 is not preserved. */ -static CORE_ADDR struct_return_address; - -CORE_ADDR -ia64_extract_struct_value_address (char *regbuf) -{ - /* FIXME: See above. */ - return struct_return_address; -} - -void -ia64_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) -{ - /* FIXME: See above. */ - /* Note that most of the work was done in ia64_push_arguments() */ - struct_return_address = addr; -} - -int -ia64_frameless_function_invocation (struct frame_info *frame) -{ - FRAME_INIT_SAVED_REGS (frame); - return (frame->extra_info->mem_stack_frame_size == 0); -} - -CORE_ADDR -ia64_saved_pc_after_call (struct frame_info *frame) -{ - return read_register (IA64_BR0_REGNUM); -} - -CORE_ADDR -ia64_frame_args_address (struct frame_info *frame) -{ - /* frame->frame points at the SP for this frame; But we want the start - of the frame, not the end. Calling frame chain will get his for us. */ - return ia64_frame_chain (frame); -} - -CORE_ADDR -ia64_frame_locals_address (struct frame_info *frame) -{ - /* frame->frame points at the SP for this frame; But we want the start - of the frame, not the end. Calling frame chain will get his for us. */ - return ia64_frame_chain (frame); -} - -void -ia64_init_extra_frame_info (int fromleaf, struct frame_info *frame) -{ - CORE_ADDR bsp, cfm; - int next_frame_is_call_dummy = ((frame->next != NULL) - && PC_IN_CALL_DUMMY (frame->next->pc, frame->next->frame, - frame->next->frame)); - - frame->extra_info = (struct frame_extra_info *) - frame_obstack_alloc (sizeof (struct frame_extra_info)); - - if (frame->next == 0) - { - bsp = read_register (IA64_BSP_REGNUM); - cfm = read_register (IA64_CFM_REGNUM); - - } - else if (frame->next->signal_handler_caller) - { - bsp = read_sigcontext_register (frame->next, IA64_BSP_REGNUM); - cfm = read_sigcontext_register (frame->next, IA64_CFM_REGNUM); - } - else if (next_frame_is_call_dummy) - { - bsp = generic_read_register_dummy (frame->next->pc, frame->next->frame, - IA64_BSP_REGNUM); - cfm = generic_read_register_dummy (frame->next->pc, frame->next->frame, - IA64_CFM_REGNUM); - } - else - { - struct frame_info *frn = frame->next; - - FRAME_INIT_SAVED_REGS (frn); - - if (frn->saved_regs[IA64_CFM_REGNUM] != 0) - cfm = read_memory_integer (frn->saved_regs[IA64_CFM_REGNUM], 8); - else if (frn->next && frn->next->signal_handler_caller) - cfm = read_sigcontext_register (frn->next, IA64_PFS_REGNUM); - else if (frn->next - && PC_IN_CALL_DUMMY (frn->next->pc, frn->next->frame, - frn->next->frame)) - cfm = generic_read_register_dummy (frn->next->pc, frn->next->frame, - IA64_PFS_REGNUM); - else - cfm = read_register (IA64_PFS_REGNUM); - - bsp = frn->extra_info->bsp; - } - frame->extra_info->cfm = cfm; - frame->extra_info->sof = cfm & 0x7f; - frame->extra_info->sol = (cfm >> 7) & 0x7f; - if (frame->next == 0 - || frame->next->signal_handler_caller - || next_frame_is_call_dummy) - frame->extra_info->bsp = rse_address_add (bsp, -frame->extra_info->sof); - else - frame->extra_info->bsp = rse_address_add (bsp, -frame->extra_info->sol); - - frame->extra_info->after_prologue = 0; - frame->extra_info->mem_stack_frame_size = -1; /* Not yet determined */ - frame->extra_info->fp_reg = 0; -} - -static int -is_float_or_hfa_type_recurse (struct type *t, struct type **etp) -{ - switch (TYPE_CODE (t)) - { - case TYPE_CODE_FLT: - if (*etp) - return TYPE_LENGTH (*etp) == TYPE_LENGTH (t); - else - { - *etp = t; - return 1; - } - break; - case TYPE_CODE_ARRAY: - return - is_float_or_hfa_type_recurse (check_typedef (TYPE_TARGET_TYPE (t)), - etp); - break; - case TYPE_CODE_STRUCT: - { - int i; - - for (i = 0; i < TYPE_NFIELDS (t); i++) - if (!is_float_or_hfa_type_recurse - (check_typedef (TYPE_FIELD_TYPE (t, i)), etp)) - return 0; - return 1; - } - break; - default: - return 0; - break; - } -} - -/* Determine if the given type is one of the floating point types or - and HFA (which is a struct, array, or combination thereof whose - bottom-most elements are all of the same floating point type.) */ - -static struct type * -is_float_or_hfa_type (struct type *t) -{ - struct type *et = 0; - - return is_float_or_hfa_type_recurse (t, &et) ? et : 0; -} - - -/* Return 1 if the alignment of T is such that the next even slot - should be used. Return 0, if the next available slot should - be used. (See section 8.5.1 of the IA-64 Software Conventions - and Runtime manual.) */ - -static int -slot_alignment_is_next_even (struct type *t) -{ - switch (TYPE_CODE (t)) - { - case TYPE_CODE_INT: - case TYPE_CODE_FLT: - if (TYPE_LENGTH (t) > 8) - return 1; - else - return 0; - case TYPE_CODE_ARRAY: - return - slot_alignment_is_next_even (check_typedef (TYPE_TARGET_TYPE (t))); - case TYPE_CODE_STRUCT: - { - int i; - - for (i = 0; i < TYPE_NFIELDS (t); i++) - if (slot_alignment_is_next_even - (check_typedef (TYPE_FIELD_TYPE (t, i)))) - return 1; - return 0; - } - default: - return 0; - } -} - -/* Attempt to find (and return) the global pointer for the given - function. - - This is a rather nasty bit of code searchs for the .dynamic section - in the objfile corresponding to the pc of the function we're trying - to call. Once it finds the addresses at which the .dynamic section - lives in the child process, it scans the Elf64_Dyn entries for a - DT_PLTGOT tag. If it finds one of these, the corresponding - d_un.d_ptr value is the global pointer. */ - -static CORE_ADDR -generic_elf_find_global_pointer (CORE_ADDR faddr) -{ - struct obj_section *faddr_sect; - - faddr_sect = find_pc_section (faddr); - if (faddr_sect != NULL) - { - struct obj_section *osect; - - ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect) - { - if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0) - break; - } - - if (osect < faddr_sect->objfile->sections_end) - { - CORE_ADDR addr; - - addr = osect->addr; - while (addr < osect->endaddr) - { - int status; - LONGEST tag; - char buf[8]; - - status = target_read_memory (addr, buf, sizeof (buf)); - if (status != 0) - break; - tag = extract_signed_integer (buf, sizeof (buf)); - - if (tag == DT_PLTGOT) - { - CORE_ADDR global_pointer; - - status = target_read_memory (addr + 8, buf, sizeof (buf)); - if (status != 0) - break; - global_pointer = extract_address (buf, sizeof (buf)); - - /* The payoff... */ - return global_pointer; - } - - if (tag == DT_NULL) - break; - - addr += 16; - } - } - } - return 0; -} - -/* Given a function's address, attempt to find (and return) the - corresponding (canonical) function descriptor. Return 0 if - not found. */ -static CORE_ADDR -find_extant_func_descr (CORE_ADDR faddr) -{ - struct obj_section *faddr_sect; - - /* Return early if faddr is already a function descriptor */ - faddr_sect = find_pc_section (faddr); - if (faddr_sect && strcmp (faddr_sect->the_bfd_section->name, ".opd") == 0) - return faddr; - - if (faddr_sect != NULL) - { - struct obj_section *osect; - ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect) - { - if (strcmp (osect->the_bfd_section->name, ".opd") == 0) - break; - } - - if (osect < faddr_sect->objfile->sections_end) - { - CORE_ADDR addr; - - addr = osect->addr; - while (addr < osect->endaddr) - { - int status; - LONGEST faddr2; - char buf[8]; - - status = target_read_memory (addr, buf, sizeof (buf)); - if (status != 0) - break; - faddr2 = extract_signed_integer (buf, sizeof (buf)); - - if (faddr == faddr2) - return addr; - - addr += 16; - } - } - } - return 0; -} - -/* Attempt to find a function descriptor corresponding to the - given address. If none is found, construct one on the - stack using the address at fdaptr */ - -static CORE_ADDR -find_func_descr (CORE_ADDR faddr, CORE_ADDR *fdaptr) -{ - CORE_ADDR fdesc; - - fdesc = find_extant_func_descr (faddr); - - if (fdesc == 0) - { - CORE_ADDR global_pointer; - char buf[16]; - - fdesc = *fdaptr; - *fdaptr += 16; - - global_pointer = FIND_GLOBAL_POINTER (faddr); - - if (global_pointer == 0) - global_pointer = read_register (IA64_GR1_REGNUM); - - store_address (buf, 8, faddr); - store_address (buf + 8, 8, global_pointer); - - write_memory (fdesc, buf, 16); - } - - return fdesc; -} - -CORE_ADDR -ia64_push_arguments (int nargs, struct value **args, CORE_ADDR sp, - int struct_return, CORE_ADDR struct_addr) -{ - int argno; - struct value *arg; - struct type *type; - int len, argoffset; - int nslots, rseslots, memslots, slotnum, nfuncargs; - int floatreg; - CORE_ADDR bsp, cfm, pfs, new_bsp, funcdescaddr; - - nslots = 0; - nfuncargs = 0; - /* Count the number of slots needed for the arguments */ - for (argno = 0; argno < nargs; argno++) - { - arg = args[argno]; - type = check_typedef (VALUE_TYPE (arg)); - len = TYPE_LENGTH (type); - - if ((nslots & 1) && slot_alignment_is_next_even (type)) - nslots++; - - if (TYPE_CODE (type) == TYPE_CODE_FUNC) - nfuncargs++; - - nslots += (len + 7) / 8; - } - - /* Divvy up the slots between the RSE and the memory stack */ - rseslots = (nslots > 8) ? 8 : nslots; - memslots = nslots - rseslots; - - /* Allocate a new RSE frame */ - cfm = read_register (IA64_CFM_REGNUM); - - bsp = read_register (IA64_BSP_REGNUM); - bsp = rse_address_add (bsp, cfm & 0x7f); - new_bsp = rse_address_add (bsp, rseslots); - write_register (IA64_BSP_REGNUM, new_bsp); - - pfs = read_register (IA64_PFS_REGNUM); - pfs &= 0xc000000000000000LL; - pfs |= (cfm & 0xffffffffffffLL); - write_register (IA64_PFS_REGNUM, pfs); - - cfm &= 0xc000000000000000LL; - cfm |= rseslots; - write_register (IA64_CFM_REGNUM, cfm); - - /* We will attempt to find function descriptors in the .opd segment, - but if we can't we'll construct them ourselves. That being the - case, we'll need to reserve space on the stack for them. */ - funcdescaddr = sp - nfuncargs * 16; - funcdescaddr &= ~0xfLL; - - /* Adjust the stack pointer to it's new value. The calling conventions - require us to have 16 bytes of scratch, plus whatever space is - necessary for the memory slots and our function descriptors */ - sp = sp - 16 - (memslots + nfuncargs) * 8; - sp &= ~0xfLL; /* Maintain 16 byte alignment */ - - /* Place the arguments where they belong. The arguments will be - either placed in the RSE backing store or on the memory stack. - In addition, floating point arguments or HFAs are placed in - floating point registers. */ - slotnum = 0; - floatreg = IA64_FR8_REGNUM; - for (argno = 0; argno < nargs; argno++) - { - struct type *float_elt_type; - - arg = args[argno]; - type = check_typedef (VALUE_TYPE (arg)); - len = TYPE_LENGTH (type); - - /* Special handling for function parameters */ - if (len == 8 - && TYPE_CODE (type) == TYPE_CODE_PTR - && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC) - { - char val_buf[8]; - - store_address (val_buf, 8, - find_func_descr (extract_address (VALUE_CONTENTS (arg), 8), - &funcdescaddr)); - if (slotnum < rseslots) - write_memory (rse_address_add (bsp, slotnum), val_buf, 8); - else - write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8); - slotnum++; - continue; - } - - /* Normal slots */ - - /* Skip odd slot if necessary... */ - if ((slotnum & 1) && slot_alignment_is_next_even (type)) - slotnum++; - - argoffset = 0; - while (len > 0) - { - char val_buf[8]; - - memset (val_buf, 0, 8); - memcpy (val_buf, VALUE_CONTENTS (arg) + argoffset, (len > 8) ? 8 : len); - - if (slotnum < rseslots) - write_memory (rse_address_add (bsp, slotnum), val_buf, 8); - else - write_memory (sp + 16 + 8 * (slotnum - rseslots), val_buf, 8); - - argoffset += 8; - len -= 8; - slotnum++; - } - - /* Handle floating point types (including HFAs) */ - float_elt_type = is_float_or_hfa_type (type); - if (float_elt_type != NULL) - { - argoffset = 0; - len = TYPE_LENGTH (type); - while (len > 0 && floatreg < IA64_FR16_REGNUM) - { - ia64_register_convert_to_raw ( - float_elt_type, - floatreg, - VALUE_CONTENTS (arg) + argoffset, - ®isters[REGISTER_BYTE (floatreg)]); - floatreg++; - argoffset += TYPE_LENGTH (float_elt_type); - len -= TYPE_LENGTH (float_elt_type); - } - } - } - - /* Store the struct return value in r8 if necessary. */ - if (struct_return) - { - store_address (®isters[REGISTER_BYTE (IA64_GR8_REGNUM)], - REGISTER_RAW_SIZE (IA64_GR8_REGNUM), - struct_addr); - } - - /* Sync gdb's idea of what the registers are with the target. */ - target_store_registers (-1); - - /* FIXME: This doesn't belong here! Instead, SAVE_DUMMY_FRAME_TOS needs - to be defined to call generic_save_dummy_frame_tos(). But at the - time of this writing, SAVE_DUMMY_FRAME_TOS wasn't gdbarch'd, so - I chose to put this call here instead of using the old mechanisms. - Once SAVE_DUMMY_FRAME_TOS is gdbarch'd, all we need to do is add the - line - - set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos); - - to ia64_gdbarch_init() and remove the line below. */ - generic_save_dummy_frame_tos (sp); - - return sp; -} - -CORE_ADDR -ia64_push_return_address (CORE_ADDR pc, CORE_ADDR sp) -{ - CORE_ADDR global_pointer = FIND_GLOBAL_POINTER (pc); - - if (global_pointer != 0) - write_register (IA64_GR1_REGNUM, global_pointer); - - write_register (IA64_BR0_REGNUM, CALL_DUMMY_ADDRESS ()); - return sp; -} - -void -ia64_store_return_value (struct type *type, char *valbuf) -{ - if (TYPE_CODE (type) == TYPE_CODE_FLT) - { - ia64_register_convert_to_raw (type, IA64_FR8_REGNUM, valbuf, - ®isters[REGISTER_BYTE (IA64_FR8_REGNUM)]); - target_store_registers (IA64_FR8_REGNUM); - } - else - write_register_bytes (REGISTER_BYTE (IA64_GR8_REGNUM), - valbuf, TYPE_LENGTH (type)); -} - -void -ia64_pop_frame (void) -{ - generic_pop_current_frame (ia64_pop_frame_regular); -} - -static void -ia64_pop_frame_regular (struct frame_info *frame) -{ - int regno; - CORE_ADDR bsp, cfm, pfs; - - FRAME_INIT_SAVED_REGS (frame); - - for (regno = 0; regno < ia64_num_regs; regno++) - { - if (frame->saved_regs[regno] - && (!(IA64_GR32_REGNUM <= regno && regno <= IA64_GR127_REGNUM)) - && regno != pc_regnum - && regno != sp_regnum - && regno != IA64_PFS_REGNUM - && regno != IA64_CFM_REGNUM - && regno != IA64_BSP_REGNUM - && regno != IA64_BSPSTORE_REGNUM) - { - write_register (regno, - read_memory_integer (frame->saved_regs[regno], - REGISTER_RAW_SIZE (regno))); - } - } - - write_register (sp_regnum, FRAME_CHAIN (frame)); - write_pc (FRAME_SAVED_PC (frame)); - - cfm = read_register (IA64_CFM_REGNUM); - - if (frame->saved_regs[IA64_PFS_REGNUM]) - { - pfs = read_memory_integer (frame->saved_regs[IA64_PFS_REGNUM], - REGISTER_RAW_SIZE (IA64_PFS_REGNUM)); - } - else - pfs = read_register (IA64_PFS_REGNUM); - - /* Compute the new bsp by *adding* the difference between the - size of the frame and the size of the locals (both wrt the - frame that we're going back to). This seems kind of strange, - especially since it seems like we ought to be subtracting the - size of the locals... and we should; but the Linux kernel - wants bsp to be set at the end of all used registers. It's - likely that this code will need to be revised to accomodate - other operating systems. */ - bsp = rse_address_add (frame->extra_info->bsp, - (pfs & 0x7f) - ((pfs >> 7) & 0x7f)); - write_register (IA64_BSP_REGNUM, bsp); - - /* FIXME: What becomes of the epilog count in the PFS? */ - cfm = (cfm & ~0xffffffffffffLL) | (pfs & 0xffffffffffffLL); - write_register (IA64_CFM_REGNUM, cfm); - - flush_cached_frames (); -} - -static void -ia64_remote_translate_xfer_address (CORE_ADDR memaddr, int nr_bytes, - CORE_ADDR *targ_addr, int *targ_len) -{ - *targ_addr = memaddr; - *targ_len = nr_bytes; -} - -static void -process_note_abi_tag_sections (bfd *abfd, asection *sect, void *obj) -{ - int *os_ident_ptr = obj; - const char *name; - unsigned int sectsize; - - name = bfd_get_section_name (abfd, sect); - sectsize = bfd_section_size (abfd, sect); - if (strcmp (name, ".note.ABI-tag") == 0 && sectsize > 0) - { - unsigned int name_length, data_length, note_type; - char *note = alloca (sectsize); - - bfd_get_section_contents (abfd, sect, note, - (file_ptr) 0, (bfd_size_type) sectsize); - - name_length = bfd_h_get_32 (abfd, note); - data_length = bfd_h_get_32 (abfd, note + 4); - note_type = bfd_h_get_32 (abfd, note + 8); - - if (name_length == 4 && data_length == 16 && note_type == 1 - && strcmp (note + 12, "GNU") == 0) - { - int os_number = bfd_h_get_32 (abfd, note + 16); - - /* The case numbers are from abi-tags in glibc */ - switch (os_number) - { - case 0 : - *os_ident_ptr = ELFOSABI_LINUX; - break; - case 1 : - *os_ident_ptr = ELFOSABI_HURD; - break; - case 2 : - *os_ident_ptr = ELFOSABI_SOLARIS; - break; - default : - internal_error (__FILE__, __LINE__, - "process_note_abi_sections: unknown OS number %d", os_number); - break; - } - } - } -} - -static struct gdbarch * -ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) -{ - struct gdbarch *gdbarch; - struct gdbarch_tdep *tdep; - int os_ident; - - if (info.abfd != NULL - && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour) - { - os_ident = elf_elfheader (info.abfd)->e_ident[EI_OSABI]; - - /* If os_ident is 0, it is not necessarily the case that we're - on a SYSV system. (ELFOSABI_NONE is defined to be 0.) - GNU/Linux uses a note section to record OS/ABI info, but - leaves e_ident[EI_OSABI] zero. So we have to check for note - sections too. */ - if (os_ident == 0) - { - bfd_map_over_sections (info.abfd, - process_note_abi_tag_sections, - &os_ident); - } - } - else - os_ident = -1; - - for (arches = gdbarch_list_lookup_by_info (arches, &info); - arches != NULL; - arches = gdbarch_list_lookup_by_info (arches->next, &info)) - { - tdep = gdbarch_tdep (arches->gdbarch); - if (tdep &&tdep->os_ident == os_ident) - return arches->gdbarch; - } - - tdep = xmalloc (sizeof (struct gdbarch_tdep)); - gdbarch = gdbarch_alloc (&info, tdep); - tdep->os_ident = os_ident; - - - /* Set the method of obtaining the sigcontext addresses at which - registers are saved. The method of checking to see if - native_find_global_pointer is nonzero to indicate that we're - on AIX is kind of hokey, but I can't think of a better way - to do it. */ - if (os_ident == ELFOSABI_LINUX) - tdep->sigcontext_register_address = ia64_linux_sigcontext_register_address; - else if (native_find_global_pointer != 0) - tdep->sigcontext_register_address = ia64_aix_sigcontext_register_address; - else - tdep->sigcontext_register_address = 0; - - /* We know that GNU/Linux won't have to resort to the - native_find_global_pointer hackery. But that's the only one we - know about so far, so if native_find_global_pointer is set to - something non-zero, then use it. Otherwise fall back to using - generic_elf_find_global_pointer. This arrangement should (in - theory) allow us to cross debug GNU/Linux binaries from an AIX - machine. */ - if (os_ident == ELFOSABI_LINUX) - tdep->find_global_pointer = generic_elf_find_global_pointer; - else if (native_find_global_pointer != 0) - tdep->find_global_pointer = native_find_global_pointer; - else - tdep->find_global_pointer = generic_elf_find_global_pointer; - - set_gdbarch_short_bit (gdbarch, 16); - set_gdbarch_int_bit (gdbarch, 32); - set_gdbarch_long_bit (gdbarch, 64); - set_gdbarch_long_long_bit (gdbarch, 64); - set_gdbarch_float_bit (gdbarch, 32); - set_gdbarch_double_bit (gdbarch, 64); - set_gdbarch_long_double_bit (gdbarch, 64); - set_gdbarch_ptr_bit (gdbarch, 64); - - set_gdbarch_num_regs (gdbarch, ia64_num_regs); - set_gdbarch_sp_regnum (gdbarch, sp_regnum); - set_gdbarch_fp_regnum (gdbarch, fp_regnum); - set_gdbarch_pc_regnum (gdbarch, pc_regnum); - set_gdbarch_fp0_regnum (gdbarch, IA64_FR0_REGNUM); - - set_gdbarch_register_name (gdbarch, ia64_register_name); - set_gdbarch_register_size (gdbarch, 8); - set_gdbarch_register_bytes (gdbarch, ia64_num_regs * 8 + 128*8); - set_gdbarch_register_byte (gdbarch, ia64_register_byte); - set_gdbarch_register_raw_size (gdbarch, ia64_register_raw_size); - set_gdbarch_max_register_raw_size (gdbarch, 16); - set_gdbarch_register_virtual_size (gdbarch, ia64_register_virtual_size); - set_gdbarch_max_register_virtual_size (gdbarch, 16); - set_gdbarch_register_virtual_type (gdbarch, ia64_register_virtual_type); - - set_gdbarch_skip_prologue (gdbarch, ia64_skip_prologue); - - set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); - set_gdbarch_frameless_function_invocation (gdbarch, ia64_frameless_function_invocation); - - set_gdbarch_saved_pc_after_call (gdbarch, ia64_saved_pc_after_call); - - set_gdbarch_frame_chain (gdbarch, ia64_frame_chain); - set_gdbarch_frame_chain_valid (gdbarch, generic_func_frame_chain_valid); - set_gdbarch_frame_saved_pc (gdbarch, ia64_frame_saved_pc); - - set_gdbarch_frame_init_saved_regs (gdbarch, ia64_frame_init_saved_regs); - set_gdbarch_get_saved_register (gdbarch, ia64_get_saved_register); - - set_gdbarch_register_convertible (gdbarch, ia64_register_convertible); - set_gdbarch_register_convert_to_virtual (gdbarch, ia64_register_convert_to_virtual); - set_gdbarch_register_convert_to_raw (gdbarch, ia64_register_convert_to_raw); - - set_gdbarch_use_struct_convention (gdbarch, ia64_use_struct_convention); - set_gdbarch_deprecated_extract_return_value (gdbarch, ia64_extract_return_value); - - set_gdbarch_store_struct_return (gdbarch, ia64_store_struct_return); - set_gdbarch_deprecated_store_return_value (gdbarch, ia64_store_return_value); - set_gdbarch_deprecated_extract_struct_value_address (gdbarch, ia64_extract_struct_value_address); - - set_gdbarch_memory_insert_breakpoint (gdbarch, ia64_memory_insert_breakpoint); - set_gdbarch_memory_remove_breakpoint (gdbarch, ia64_memory_remove_breakpoint); - set_gdbarch_breakpoint_from_pc (gdbarch, ia64_breakpoint_from_pc); - set_gdbarch_read_pc (gdbarch, ia64_read_pc); - set_gdbarch_write_pc (gdbarch, ia64_write_pc); - - /* Settings for calling functions in the inferior. */ - set_gdbarch_use_generic_dummy_frames (gdbarch, 1); - set_gdbarch_call_dummy_length (gdbarch, 0); - set_gdbarch_push_arguments (gdbarch, ia64_push_arguments); - set_gdbarch_push_return_address (gdbarch, ia64_push_return_address); - set_gdbarch_pop_frame (gdbarch, ia64_pop_frame); - - set_gdbarch_call_dummy_p (gdbarch, 1); - set_gdbarch_call_dummy_words (gdbarch, ia64_call_dummy_words); - set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof (ia64_call_dummy_words)); - set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); - set_gdbarch_init_extra_frame_info (gdbarch, ia64_init_extra_frame_info); - set_gdbarch_frame_args_address (gdbarch, ia64_frame_args_address); - set_gdbarch_frame_locals_address (gdbarch, ia64_frame_locals_address); - - /* We won't necessarily have a frame pointer and even if we do, - it winds up being extraordinarly messy when attempting to find - the frame chain. So for the purposes of creating frames (which - is all read_fp() is used for), simply use the stack pointer value - instead. */ - set_gdbarch_read_fp (gdbarch, generic_target_read_sp); - - /* Settings that should be unnecessary. */ - set_gdbarch_inner_than (gdbarch, core_addr_lessthan); - - set_gdbarch_read_sp (gdbarch, generic_target_read_sp); - set_gdbarch_write_sp (gdbarch, generic_target_write_sp); - - set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); - set_gdbarch_call_dummy_address (gdbarch, entry_point_address); - 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_stack_adjust_p (gdbarch, 0); - set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame); - set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy); - - set_gdbarch_decr_pc_after_break (gdbarch, 0); - set_gdbarch_function_start_offset (gdbarch, 0); - set_gdbarch_frame_args_skip (gdbarch, 0); - - set_gdbarch_remote_translate_xfer_address ( - gdbarch, ia64_remote_translate_xfer_address); - - return gdbarch; -} - -void -_initialize_ia64_tdep (void) -{ - register_gdbarch_init (bfd_arch_ia64, ia64_gdbarch_init); - - tm_print_insn = print_insn_ia64; - tm_print_insn_info.bytes_per_line = SLOT_MULTIPLIER; -} |