diff options
Diffstat (limited to 'meta-microblaze/recipes-devtools/gdb/gdb/0001-Add-initial-port-of-linux-gdbserver.patch')
| -rw-r--r-- | meta-microblaze/recipes-devtools/gdb/gdb/0001-Add-initial-port-of-linux-gdbserver.patch | 653 |
1 files changed, 653 insertions, 0 deletions
diff --git a/meta-microblaze/recipes-devtools/gdb/gdb/0001-Add-initial-port-of-linux-gdbserver.patch b/meta-microblaze/recipes-devtools/gdb/gdb/0001-Add-initial-port-of-linux-gdbserver.patch new file mode 100644 index 00000000..050bdde5 --- /dev/null +++ b/meta-microblaze/recipes-devtools/gdb/gdb/0001-Add-initial-port-of-linux-gdbserver.patch @@ -0,0 +1,653 @@ +From baac387700a72407b3994bfd0a03825112c9745f Mon Sep 17 00:00:00 2001 +From: Mahesh Bodapati <mbodapat@xilinx.com> +Date: Mon, 10 Oct 2022 15:07:22 +0530 +Subject: [PATCH 1/8] Add initial port of linux gdbserver add + gdb_proc_service_h to gdbserver microblaze-linux + +gdbserver needs to initialise the microblaze registers + +other archs use this step to run a *_arch_setup() to carry out all +architecture specific setup - may need to add in future + + * add linux-ptrace.o to gdbserver configure + * Update breakpoint opcode + * fix segfault on connecting gdbserver + * add microblaze_linux_memory_remove_breakpoint + * add set_solib_svr4_fetch_link_map_offsets + * add set_gdbarch_fetch_tls_load_module_address + * Force reading of r0 as 0, prevent stores + +Upstream-Status: Pending + +Signed-off-by: David Holsgrove <david.holsgrove@petalogix.com> +Signed-off-by: Nathan Rossi <nathan.rossi@petalogix.com> +Signed-off-by: Mahesh Bodapati <mbodapat@xilinx.com> +--- + gdb/configure.host | 2 + + gdb/features/Makefile | 1 + + gdb/features/microblaze-linux.xml | 13 ++ + gdb/microblaze-linux-tdep.c | 29 ++- + gdb/microblaze-tdep.c | 35 +++- + gdb/microblaze-tdep.h | 4 +- + gdb/regformats/microblaze-linux.dat | 64 +++++++ + gdb/regformats/reg-microblaze.dat | 41 +++++ + gdbserver/Makefile.in | 1 + + gdbserver/configure.srv | 10 ++ + gdbserver/linux-microblaze-low.cc | 269 ++++++++++++++++++++++++++++ + 11 files changed, 466 insertions(+), 3 deletions(-) + create mode 100644 gdb/features/microblaze-linux.xml + create mode 100644 gdb/regformats/microblaze-linux.dat + create mode 100644 gdb/regformats/reg-microblaze.dat + create mode 100644 gdbserver/linux-microblaze-low.cc + +diff --git a/gdb/configure.host b/gdb/configure.host +index da71675b201..877537d06ef 100644 +--- a/gdb/configure.host ++++ b/gdb/configure.host +@@ -61,6 +61,7 @@ i[34567]86*) gdb_host_cpu=i386 ;; + loongarch*) gdb_host_cpu=loongarch ;; + m68*) gdb_host_cpu=m68k ;; + mips*) gdb_host_cpu=mips ;; ++microblaze*) gdb_host_cpu=microblaze ;; + powerpc* | rs6000) gdb_host_cpu=powerpc ;; + sparcv9 | sparc64) gdb_host_cpu=sparc ;; + s390*) gdb_host_cpu=s390 ;; +@@ -127,6 +128,7 @@ m68*-*-openbsd*) gdb_host=obsd ;; + + m88*-*-openbsd*) gdb_host=obsd ;; + ++microblaze*-*linux*) gdb_host=linux ;; + mips*-*-linux*) gdb_host=linux ;; + mips*-*-netbsdaout* | mips*-*-knetbsd*-gnu) + gdb_host=nbsd ;; +diff --git a/gdb/features/Makefile b/gdb/features/Makefile +index 68e17d0085d..fc3196864c9 100644 +--- a/gdb/features/Makefile ++++ b/gdb/features/Makefile +@@ -46,6 +46,7 @@ + # List of .dat files to create in ../regformats/ + WHICH = mips-linux mips-dsp-linux \ + mips64-linux mips64-dsp-linux \ ++ microblaze-linux \ + nios2-linux \ + or1k-linux \ + rs6000/powerpc-32 \ +diff --git a/gdb/features/microblaze-linux.xml b/gdb/features/microblaze-linux.xml +new file mode 100644 +index 00000000000..688a3f83d1e +--- /dev/null ++++ b/gdb/features/microblaze-linux.xml +@@ -0,0 +1,13 @@ ++<?xml version="1.0"?> ++<!-- Copyright (C) 2014-2018 Free Software Foundation, Inc. ++ ++ Copying and distribution of this file, with or without modification, ++ are permitted in any medium without royalty provided the copyright ++ notice and this notice are preserved. --> ++ ++<!DOCTYPE target SYSTEM "gdb-target.dtd"> ++<target> ++ <architecture>microblaze</architecture> ++ <osabi>GNU/Linux</osabi> ++ <xi:include href="microblaze-core.xml"/> ++</target> +diff --git a/gdb/microblaze-linux-tdep.c b/gdb/microblaze-linux-tdep.c +index daa7ddf7e4d..5748556a556 100644 +--- a/gdb/microblaze-linux-tdep.c ++++ b/gdb/microblaze-linux-tdep.c +@@ -37,6 +37,22 @@ + #include "tramp-frame.h" + #include "linux-tdep.h" + ++static int microblaze_debug_flag = 0; ++ ++static void ++microblaze_debug (const char *fmt, ...) ++{ ++ if (microblaze_debug_flag) ++ { ++ va_list args; ++ ++ va_start (args, fmt); ++ printf_unfiltered ("MICROBLAZE LINUX: "); ++ vprintf_unfiltered (fmt, args); ++ va_end (args); ++ } ++} ++ + static int + microblaze_linux_memory_remove_breakpoint (struct gdbarch *gdbarch, + struct bp_target_info *bp_tgt) +@@ -50,13 +66,20 @@ microblaze_linux_memory_remove_breakpoint (struct gdbarch *gdbarch, + /* Determine appropriate breakpoint contents and size for this address. */ + bp = gdbarch_breakpoint_from_pc (gdbarch, &addr, &bplen); + ++ /* Make sure we see the memory breakpoints. */ ++ scoped_restore restore_memory ++ = make_scoped_restore_show_memory_breakpoints (1); ++ + val = target_read_memory (addr, old_contents, bplen); + + /* If our breakpoint is no longer at the address, this means that the + program modified the code on us, so it is wrong to put back the + old value. */ + if (val == 0 && memcmp (bp, old_contents, bplen) == 0) +- val = target_write_raw_memory (addr, bp_tgt->shadow_contents, bplen); ++ { ++ val = target_write_raw_memory (addr, bp_tgt->shadow_contents, bplen); ++ microblaze_debug ("microblaze_linux_memory_remove_breakpoint writing back to memory at addr 0x%lx\n", addr); ++ } + + return val; + } +@@ -129,6 +152,10 @@ microblaze_linux_init_abi (struct gdbarch_info info, + /* Trampolines. */ + tramp_frame_prepend_unwinder (gdbarch, + µblaze_linux_sighandler_tramp_frame); ++ ++ /* Enable TLS support. */ ++ set_gdbarch_fetch_tls_load_module_address (gdbarch, ++ svr4_fetch_objfile_link_map); + } + + void _initialize_microblaze_linux_tdep (); +diff --git a/gdb/microblaze-tdep.c b/gdb/microblaze-tdep.c +index 3d5dd669341..3e8e8fe35b9 100644 +--- a/gdb/microblaze-tdep.c ++++ b/gdb/microblaze-tdep.c +@@ -128,7 +128,38 @@ microblaze_fetch_instruction (CORE_ADDR pc) + constexpr gdb_byte microblaze_break_insn[] = MICROBLAZE_BREAKPOINT; + + typedef BP_MANIPULATION (microblaze_break_insn) microblaze_breakpoint; +- ++static int ++microblaze_linux_memory_remove_breakpoint (struct gdbarch *gdbarch, ++ struct bp_target_info *bp_tgt) ++{ ++ CORE_ADDR addr = bp_tgt->placed_address; ++ const unsigned char *bp; ++ int val; ++ int bplen; ++ gdb_byte old_contents[BREAKPOINT_MAX]; ++ ++ /* Determine appropriate breakpoint contents and size for this address. */ ++ bp = gdbarch_breakpoint_from_pc (gdbarch, &addr, &bplen); ++ if (bp == NULL) ++ error (_("Software breakpoints not implemented for this target.")); ++ ++ /* Make sure we see the memory breakpoints. */ ++ scoped_restore restore_memory ++ = make_scoped_restore_show_memory_breakpoints (1); ++ ++ val = target_read_memory (addr, old_contents, bplen); ++ ++ /* If our breakpoint is no longer at the address, this means that the ++ program modified the code on us, so it is wrong to put back the ++ old value. */ ++ if (val == 0 && memcmp (bp, old_contents, bplen) == 0) ++ { ++ val = target_write_raw_memory (addr, bp_tgt->shadow_contents, bplen); ++ microblaze_debug ("microblaze_linux_memory_remove_breakpoint writing back to memory at addr 0x%lx\n", addr); ++ } ++ ++ return val; ++} + + /* Allocate and initialize a frame cache. */ + +@@ -716,6 +747,7 @@ microblaze_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) + microblaze_breakpoint::kind_from_pc); + set_gdbarch_sw_breakpoint_from_kind (gdbarch, + microblaze_breakpoint::bp_from_kind); ++ set_gdbarch_memory_remove_breakpoint (gdbarch, microblaze_linux_memory_remove_breakpoint); + + set_gdbarch_frame_args_skip (gdbarch, 8); + +@@ -756,4 +788,5 @@ When non-zero, microblaze specific debugging is enabled."), + NULL, + &setdebuglist, &showdebuglist); + ++ + } +diff --git a/gdb/microblaze-tdep.h b/gdb/microblaze-tdep.h +index 4d90e8785dc..53fcb2297e6 100644 +--- a/gdb/microblaze-tdep.h ++++ b/gdb/microblaze-tdep.h +@@ -118,6 +118,8 @@ struct microblaze_frame_cache + + /* MICROBLAZE_BREAKPOINT defines the breakpoint that should be used. + Only used for native debugging. */ +-#define MICROBLAZE_BREAKPOINT {0xb9, 0xcc, 0x00, 0x60} ++#define MICROBLAZE_BREAKPOINT {0xba, 0x0c, 0x00, 0x18} ++#define MICROBLAZE_BREAKPOINT_LE {0x18, 0x00, 0x0c, 0xba} ++ + + #endif /* microblaze-tdep.h */ +diff --git a/gdb/regformats/microblaze-linux.dat b/gdb/regformats/microblaze-linux.dat +new file mode 100644 +index 00000000000..b5b49f485cd +--- /dev/null ++++ b/gdb/regformats/microblaze-linux.dat +@@ -0,0 +1,64 @@ ++# THIS FILE IS GENERATED. -*- buffer-read-only: t -*- vi :set ro: ++# Generated from: microblaze-linux.xml ++name:microblaze_linux ++xmltarget:microblaze-linux.xml ++expedite:r1,rpc ++32:r0 ++32:r1 ++32:r2 ++32:r3 ++32:r4 ++32:r5 ++32:r6 ++32:r7 ++32:r8 ++32:r9 ++32:r10 ++32:r11 ++32:r12 ++32:r13 ++32:r14 ++32:r15 ++32:r16 ++32:r17 ++32:r18 ++32:r19 ++32:r20 ++32:r21 ++32:r22 ++32:r23 ++32:r24 ++32:r25 ++32:r26 ++32:r27 ++32:r28 ++32:r29 ++32:r30 ++32:r31 ++32:rpc ++32:rmsr ++32:rear ++32:resr ++32:rfsr ++32:rbtr ++32:rpvr0 ++32:rpvr1 ++32:rpvr2 ++32:rpvr3 ++32:rpvr4 ++32:rpvr5 ++32:rpvr6 ++32:rpvr7 ++32:rpvr8 ++32:rpvr9 ++32:rpvr10 ++32:rpvr11 ++32:redr ++32:rpid ++32:rzpr ++32:rtlbx ++32:rtlbsx ++32:rtlblo ++32:rtlbhi ++32:slr ++32:shr +diff --git a/gdb/regformats/reg-microblaze.dat b/gdb/regformats/reg-microblaze.dat +new file mode 100644 +index 00000000000..bd8a4384424 +--- /dev/null ++++ b/gdb/regformats/reg-microblaze.dat +@@ -0,0 +1,41 @@ ++name:microblaze ++expedite:r1,pc ++32:r0 ++32:r1 ++32:r2 ++32:r3 ++32:r4 ++32:r5 ++32:r6 ++32:r7 ++32:r8 ++32:r9 ++32:r10 ++32:r11 ++32:r12 ++32:r13 ++32:r14 ++32:r15 ++32:r16 ++32:r17 ++32:r18 ++32:r19 ++32:r20 ++32:r21 ++32:r22 ++32:r23 ++32:r24 ++32:r25 ++32:r26 ++32:r27 ++32:r28 ++32:r29 ++32:r30 ++32:r31 ++32:pc ++32:msr ++32:ear ++32:esr ++32:fsr ++32:slr ++32:shr +diff --git a/gdbserver/Makefile.in b/gdbserver/Makefile.in +index 47648b8d962..55a5f5b81ae 100644 +--- a/gdbserver/Makefile.in ++++ b/gdbserver/Makefile.in +@@ -178,6 +178,7 @@ SFILES = \ + $(srcdir)/linux-ia64-low.cc \ + $(srcdir)/linux-low.cc \ + $(srcdir)/linux-m68k-low.cc \ ++ $(srcdir)/linux-microblaze-low.cc \ + $(srcdir)/linux-mips-low.cc \ + $(srcdir)/linux-nios2-low.cc \ + $(srcdir)/linux-or1k-low.cc \ +diff --git a/gdbserver/configure.srv b/gdbserver/configure.srv +index 6e09b0eeb79..1817f1f04fb 100644 +--- a/gdbserver/configure.srv ++++ b/gdbserver/configure.srv +@@ -145,6 +145,16 @@ case "${gdbserver_host}" in + srv_linux_regsets=yes + srv_linux_thread_db=yes + ;; ++ ++microblaze*-*-linux*) srv_regobj="microblaze-linux.o" ++ srv_tgtobj="$srv_linux_obj linux-microblaze-low.o" ++ srv_xmlfiles="microblaze-linux.xml" ++ srv_xmlfiles="${srv_xmlfiles} microblaze-core.xml" ++ srv_linux_usrregs=yes ++ srv_linux_regsets=yes ++ srv_linux_thread_db=yes ++ ;; ++ + mips*-*-linux*) srv_regobj="mips-linux.o" + srv_regobj="${srv_regobj} mips-dsp-linux.o" + srv_regobj="${srv_regobj} mips64-linux.o" +diff --git a/gdbserver/linux-microblaze-low.cc b/gdbserver/linux-microblaze-low.cc +new file mode 100644 +index 00000000000..bf9eecc41ab +--- /dev/null ++++ b/gdbserver/linux-microblaze-low.cc +@@ -0,0 +1,269 @@ ++/* GNU/Linux/Microblaze specific low level interface, for the remote server for ++ GDB. ++ Copyright (C) 1995-2013 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 3 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, see <http://www.gnu.org/licenses/>. */ ++ ++#include "server.h" ++#include "linux-low.h" ++ ++#include "elf/common.h" ++#include "nat/gdb_ptrace.h" ++#include <endian.h> ++ ++#include <asm/ptrace.h> ++#include <sys/procfs.h> ++#include <sys/ptrace.h> ++ ++#include "gdb_proc_service.h" ++ ++ ++static int microblaze_regmap[] = ++ {PT_GPR(0), PT_GPR(1), PT_GPR(2), PT_GPR(3), ++ PT_GPR(4), PT_GPR(5), PT_GPR(6), PT_GPR(7), ++ PT_GPR(8), PT_GPR(9), PT_GPR(10), PT_GPR(11), ++ PT_GPR(12), PT_GPR(13), PT_GPR(14), PT_GPR(15), ++ PT_GPR(16), PT_GPR(17), PT_GPR(18), PT_GPR(19), ++ PT_GPR(20), PT_GPR(21), PT_GPR(22), PT_GPR(23), ++ PT_GPR(24), PT_GPR(25), PT_GPR(26), PT_GPR(27), ++ PT_GPR(28), PT_GPR(29), PT_GPR(30), PT_GPR(31), ++ PT_PC, PT_MSR, PT_EAR, PT_ESR, ++ PT_FSR ++ }; ++ ++ ++ ++class microblaze_target : public linux_process_target ++{ ++public: ++ ++ const regs_info *get_regs_info () override; ++ ++ const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override; ++ // CORE_ADDR microblaze_reinsert_addr (regcache *regcache); ++ ++protected: ++ ++ void low_arch_setup () override; ++ ++ bool low_cannot_fetch_register (int regno) override; ++ ++ bool low_cannot_store_register (int regno) override; ++ ++ // bool low_supports_breakpoints () override; ++ ++ CORE_ADDR low_get_pc (regcache *regcache) override; ++ ++ void low_set_pc (regcache *regcache, CORE_ADDR newpc) override; ++ ++ bool low_breakpoint_at (CORE_ADDR pc) override; ++}; ++ ++/* The singleton target ops object. */ ++ ++static microblaze_target the_microblaze_target; ++ ++#define microblaze_num_regs (sizeof (microblaze_regmap) / sizeof (microblaze_regmap[0])) ++ ++/* Defined in auto-generated file microblaze-linux.c. */ ++void init_registers_microblaze_linux (void); ++extern const struct target_desc *tdesc_microblaze_linux; ++ ++bool ++microblaze_target::low_cannot_store_register (int regno) ++{ ++ if (microblaze_regmap[regno] == -1 || regno == 0) ++ return 1; ++ ++ return 0; ++} ++ ++bool ++microblaze_target::low_cannot_fetch_register (int regno) ++{ ++ return 0; ++} ++ ++CORE_ADDR ++microblaze_target::low_get_pc (struct regcache *regcache) ++{ ++ unsigned long pc; ++ ++ collect_register_by_name (regcache, "pc", &pc); ++ return (CORE_ADDR) pc; ++} ++ ++void ++microblaze_target::low_set_pc (struct regcache *regcache, CORE_ADDR pc) ++{ ++ unsigned long newpc = pc; ++ ++ supply_register_by_name (regcache, "pc", &newpc); ++} ++ ++/* dbtrap insn */ ++/* brki r16, 0x18; */ ++static const unsigned long microblaze_breakpoint = 0xba0c0018; ++#define microblaze_breakpoint_len 4 ++ ++/* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ ++ ++const gdb_byte * ++microblaze_target::sw_breakpoint_from_kind (int kind, int *size) ++{ ++ *size = microblaze_breakpoint_len; ++ return (const gdb_byte *) µblaze_breakpoint; ++} ++ ++bool ++microblaze_target::low_breakpoint_at (CORE_ADDR where) ++{ ++ unsigned long insn; ++ ++ read_memory (where, (unsigned char *) &insn, 4); ++ if (insn == microblaze_breakpoint) ++ return 1; ++ /* If necessary, recognize more trap instructions here. GDB only uses the ++ one. */ ++ return 0; ++} ++#if 0 ++CORE_ADDR ++microblaze_target::microblaze_reinsert_addr (struct regcache *regcache) ++{ ++ unsigned long pc; ++ collect_register_by_name (regcache, "r15", &pc); ++ return pc; ++} ++#endif ++#if 0 ++#ifdef HAVE_PTRACE_GETREGS ++ ++static void ++microblaze_collect_ptrace_register (struct regcache *regcache, int regno, char *buf) ++{ ++ int size = register_size (regcache->tdesc, regno); ++ ++ memset (buf, 0, sizeof (long)); ++ ++ if (size < sizeof (long)) ++ collect_register (regcache, regno, buf + sizeof (long) - size); ++ else ++ collect_register (regcache, regno, buf); ++} ++ ++static void ++microblaze_supply_ptrace_register (struct regcache *regcache, ++ int regno, const char *buf) ++{ ++ int size = register_size (regcache->tdesc, regno); ++ ++ if (regno == 0) { ++ unsigned long regbuf_0 = 0; ++ /* clobbering r0 so that it is always 0 as enforced by hardware */ ++ supply_register (regcache, regno, (const char*)®buf_0); ++ } else { ++ if (size < sizeof (long)) ++ supply_register (regcache, regno, buf + sizeof (long) - size); ++ else ++ supply_register (regcache, regno, buf); ++ } ++} ++ ++/* Provide only a fill function for the general register set. ps_lgetregs ++ will use this for NPTL support. */ ++ ++static void microblaze_fill_gregset (struct regcache *regcache, void *buf) ++{ ++ int i; ++ ++ for (i = 0; i < 32; i++) ++ microblaze_collect_ptrace_register (regcache, i, (char *) buf + microblaze_regmap[i]); ++} ++ ++static void ++microblaze_store_gregset (struct regcache *regcache, const void *buf) ++{ ++ int i; ++ ++ for (i = 0; i < 32; i++) ++ supply_register (regcache, i, (char *) buf + microblaze_regmap[i]); ++} ++ ++#endif /* HAVE_PTRACE_GETREGS */ ++#endif ++ ++static struct regset_info microblaze_regsets[] = { ++#if 0 ++#ifdef HAVE_PTRACE_GETREGS ++ { PTRACE_GETREGS, PTRACE_SETREGS, 0, sizeof (elf_gregset_t), GENERAL_REGS, microblaze_fill_gregset, microblaze_store_gregset }, ++ { 0, 0, 0, -1, GENERAL_REGS, NULL, NULL }, ++#endif /* HAVE_PTRACE_GETREGS */ ++#endif ++ { 0, 0, 0, -1, GENERAL_REGS, NULL, NULL }, ++ NULL_REGSET ++}; ++ ++static struct usrregs_info microblaze_usrregs_info = ++ { ++ microblaze_num_regs, ++ microblaze_regmap, ++ }; ++ ++static struct regsets_info microblaze_regsets_info = ++ { ++ microblaze_regsets, /* regsets */ ++ 0, /* num_regsets */ ++ NULL, /* disabled_regsets */ ++ }; ++ ++static struct regs_info microblaze_regs_info = ++ { ++ NULL, /* regset_bitmap */ ++ µblaze_usrregs_info, ++ µblaze_regsets_info ++ }; ++ ++const regs_info * ++microblaze_target::get_regs_info (void) ++{ ++ return µblaze_regs_info; ++} ++ ++/* Support for hardware single step. */ ++ ++static int ++microblaze_supports_hardware_single_step (void) ++{ ++ return 1; ++} ++ ++ ++void ++microblaze_target::low_arch_setup (void) ++{ ++ current_process ()->tdesc = tdesc_microblaze_linux; ++} ++ ++linux_process_target *the_linux_target = &the_microblaze_target; ++ ++void ++initialize_low_arch (void) ++{ ++ init_registers_microblaze_linux (); ++ initialize_regsets_info (µblaze_regsets_info); ++} ++ +-- +2.37.1 (Apple Git-137.1) + |