1cda151268
On powerpc64, qSymbol for a function returns the function code address, and not the descriptor address. Since we emit code calling gdb_collect and some other functions, we need the descriptor (no way to know the proper TOC address without it). To get the descriptor address, make global function pointer variables in the IPA pointing to the relevant functions and read them instead of asking for them directly via qSymbol. gdb/gdbserver/ChangeLog: * linux-aarch64-ipa.c: Rename gdb_agent_get_raw_reg to get_raw_reg. * linux-amd64-ipa.c: Likewise. * linux-i386-ipa.c: Likewise. * linux-s390-ipa.c: Likewise. * tracepoint.c: IPA-export gdb_collect_ptr instead of gdb_collect, ditto for get_raw_reg_ptr, get_trace_state_variable_value_ptr, set_trace_state_variable_value_ptr. (struct ipa_sym_addresses): Likewise. (symbol_list): Likewise. (install_fast_tracepoint): Dereference gdb_collect_ptr instead of accessing gdb_collect directly. (gdb_collect_ptr_type): New typedef. (get_raw_reg_ptr_type): New typedef. (get_trace_state_variable_value_ptr_type): New typedef. (set_trace_state_variable_value_ptr_type): New typedef. (gdb_collect_ptr): New global. (get_raw_reg_ptr): New global. (get_trace_state_variable_value_ptr): New global. (set_trace_state_variable_value_ptr): New global. (get_raw_reg_func_addr): Dereference get_raw_reg_ptr instead of accessing get_raw_reg directly. (get_get_tsv_func_addr): Likewise for get_trace_state_variable_value_ptr. (get_set_tsv_func_addr): Likewise for set_trace_state_variable_value_ptr. * tracepoint.h: Rename gdb_agent_get_raw_reg to get_raw_reg.
160 lines
3.7 KiB
C
160 lines
3.7 KiB
C
/* GNU/Linux/AArch64 specific low level interface, for the in-process
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agent library for GDB.
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Copyright (C) 2015-2016 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include "tracepoint.h"
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/* Defined in auto-generated file aarch64.c. */
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void init_registers_aarch64 (void);
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extern const struct target_desc *tdesc_aarch64;
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/* Each register saved by the jump pad is in a 16 byte cell. */
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#define FT_CR_SIZE 16
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#define FT_CR_FPCR 0
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#define FT_CR_FPSR 1
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#define FT_CR_CPSR 2
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#define FT_CR_PC 3
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#define FT_CR_SP 4
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#define FT_CR_X0 5
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#define FT_CR_GPR(n) (FT_CR_X0 + (n))
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#define FT_CR_FPR(n) (FT_CR_GPR (31) + (n))
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/* Mapping between registers collected by the jump pad and GDB's register
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array layout used by regcache.
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See linux-aarch64-low.c (aarch64_install_fast_tracepoint_jump_pad) for
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more details. */
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static const int aarch64_ft_collect_regmap[] = {
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FT_CR_GPR (0),
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FT_CR_GPR (1),
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FT_CR_GPR (2),
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FT_CR_GPR (3),
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FT_CR_GPR (4),
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FT_CR_GPR (5),
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FT_CR_GPR (6),
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FT_CR_GPR (7),
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FT_CR_GPR (8),
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FT_CR_GPR (9),
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FT_CR_GPR (10),
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FT_CR_GPR (11),
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FT_CR_GPR (12),
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FT_CR_GPR (13),
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FT_CR_GPR (14),
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FT_CR_GPR (15),
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FT_CR_GPR (16),
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FT_CR_GPR (17),
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FT_CR_GPR (18),
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FT_CR_GPR (19),
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FT_CR_GPR (20),
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FT_CR_GPR (21),
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FT_CR_GPR (22),
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FT_CR_GPR (23),
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FT_CR_GPR (24),
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FT_CR_GPR (25),
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FT_CR_GPR (26),
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FT_CR_GPR (27),
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FT_CR_GPR (28),
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/* FP */
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FT_CR_GPR (29),
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/* LR */
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FT_CR_GPR (30),
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FT_CR_SP,
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FT_CR_PC,
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FT_CR_CPSR,
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FT_CR_FPR (0),
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FT_CR_FPR (1),
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FT_CR_FPR (2),
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FT_CR_FPR (3),
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FT_CR_FPR (4),
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FT_CR_FPR (5),
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FT_CR_FPR (6),
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FT_CR_FPR (7),
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FT_CR_FPR (8),
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FT_CR_FPR (9),
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FT_CR_FPR (10),
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FT_CR_FPR (11),
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FT_CR_FPR (12),
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FT_CR_FPR (13),
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FT_CR_FPR (14),
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FT_CR_FPR (15),
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FT_CR_FPR (16),
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FT_CR_FPR (17),
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FT_CR_FPR (18),
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FT_CR_FPR (19),
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FT_CR_FPR (20),
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FT_CR_FPR (21),
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FT_CR_FPR (22),
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FT_CR_FPR (23),
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FT_CR_FPR (24),
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FT_CR_FPR (25),
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FT_CR_FPR (26),
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FT_CR_FPR (27),
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FT_CR_FPR (28),
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FT_CR_FPR (29),
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FT_CR_FPR (30),
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FT_CR_FPR (31),
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FT_CR_FPSR,
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FT_CR_FPCR
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};
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#define AARCH64_NUM_FT_COLLECT_GREGS \
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(sizeof (aarch64_ft_collect_regmap) / sizeof(aarch64_ft_collect_regmap[0]))
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/* Fill in REGCACHE with registers saved by the jump pad in BUF. */
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void
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supply_fast_tracepoint_registers (struct regcache *regcache,
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const unsigned char *buf)
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{
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int i;
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for (i = 0; i < AARCH64_NUM_FT_COLLECT_GREGS; i++)
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supply_register (regcache, i,
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((char *) buf)
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+ (aarch64_ft_collect_regmap[i] * FT_CR_SIZE));
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}
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ULONGEST
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get_raw_reg (const unsigned char *raw_regs, int regnum)
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{
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if (regnum >= AARCH64_NUM_FT_COLLECT_GREGS)
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return 0;
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return *(ULONGEST *) (raw_regs
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+ aarch64_ft_collect_regmap[regnum] * FT_CR_SIZE);
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}
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/* Return target_desc to use for IPA, given the tdesc index passed by
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gdbserver. Index is ignored, since we have only one tdesc
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at the moment. */
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const struct target_desc *
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get_ipa_tdesc (int idx)
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{
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return tdesc_aarch64;
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}
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void
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initialize_low_tracepoint (void)
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{
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init_registers_aarch64 ();
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}
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