From 74f73159e5c659d8ee52a3d48238932b36e4fe93 Mon Sep 17 00:00:00 2001 From: Nathan Rossi Date: Mon, 16 Dec 2013 16:48:36 +1000 Subject: gdb: Add MicroBlaze support * Import Xilinx gdb patches for MicroBlaze * Disable dependence on LTTng-UST for MicroBlaze, it is not supported Signed-off-by: Nathan Rossi --- .../0001-Add-initial-port-of-linux-gdbserver.patch | 471 +++++++++++++++++++++ 1 file changed, 471 insertions(+) create mode 100644 recipes-devtools/gdb/files/0001-Add-initial-port-of-linux-gdbserver.patch (limited to 'recipes-devtools/gdb/files/0001-Add-initial-port-of-linux-gdbserver.patch') diff --git a/recipes-devtools/gdb/files/0001-Add-initial-port-of-linux-gdbserver.patch b/recipes-devtools/gdb/files/0001-Add-initial-port-of-linux-gdbserver.patch new file mode 100644 index 00000000..5c195538 --- /dev/null +++ b/recipes-devtools/gdb/files/0001-Add-initial-port-of-linux-gdbserver.patch @@ -0,0 +1,471 @@ +From: David Holsgrove +Date: Mon, 6 Feb 2012 10:28:29 +1000 +Subject: 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 + +Signed-off-by: David Holsgrove +Signed-off-by: Nathan Rossi +Upstream-Status: Pending +--- + gdb/configure.host | 3 + + gdb/gdbserver/linux-microblaze-low.c | 228 ++++++++++++++++++++++++++++++++++ + gdb/microblaze-linux-tdep.c | 30 ++++- + gdb/microblaze-tdep.c | 35 ++++++ + gdb/microblaze-tdep.h | 3 +- + gdb/regformats/reg-microblaze.dat | 39 ++++++ + 6 files changed, 336 insertions(+), 2 deletions(-) + create mode 100644 gdb/gdbserver/linux-microblaze-low.c + create mode 100644 gdb/regformats/reg-microblaze.dat + +diff --git a/gdb/configure.host b/gdb/configure.host +index 85f4491..98b0f43 100644 +--- a/gdb/configure.host ++++ b/gdb/configure.host +@@ -47,6 +47,7 @@ i[34567]86*) gdb_host_cpu=i386 ;; + m68*) gdb_host_cpu=m68k ;; + m88*) gdb_host_cpu=m88k ;; + 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 ;; +@@ -126,6 +127,8 @@ mips*-*-netbsd* | mips*-*-knetbsd*-gnu) + gdb_host=nbsd ;; + mips64*-*-openbsd*) gdb_host=obsd64 ;; + ++microblaze*-*linux*) gdb_host=linux ;; ++ + powerpc-*-aix* | rs6000-*-*) + gdb_host=aix ;; + powerpc*-*-freebsd*) gdb_host=fbsd ;; +diff --git a/gdb/gdbserver/linux-microblaze-low.c b/gdb/gdbserver/linux-microblaze-low.c +new file mode 100644 +index 0000000..279df9f +--- /dev/null ++++ b/gdb/gdbserver/linux-microblaze-low.c +@@ -0,0 +1,228 @@ ++/* 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 . */ ++ ++#include "server.h" ++#include "linux-low.h" ++ ++#include ++#include ++#include ++ ++#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 ++ }; ++ ++#define microblaze_num_regs (sizeof microblaze_regmap / sizeof microblaze_regmap[0]) ++ ++/* Defined in auto-generated file microblaze-linux.c. */ ++void init_registers_microblaze (void); ++extern const struct target_desc *tdesc_microblaze; ++ ++static int ++microblaze_cannot_store_register (int regno) ++{ ++ if (microblaze_regmap[regno] == -1 || regno == 0) ++ return 1; ++ ++ return 0; ++} ++ ++static int ++microblaze_cannot_fetch_register (int regno) ++{ ++ return 0; ++} ++ ++static CORE_ADDR ++microblaze_get_pc (struct regcache *regcache) ++{ ++ unsigned long pc; ++ ++ collect_register_by_name (regcache, "pc", &pc); ++ return (CORE_ADDR) pc; ++} ++ ++static void ++microblaze_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 ++ ++static int ++microblaze_breakpoint_at (CORE_ADDR where) ++{ ++ unsigned long insn; ++ ++ (*the_target->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; ++} ++ ++static CORE_ADDR ++microblaze_reinsert_addr (struct regcache *regcache) ++{ ++ unsigned long pc; ++ collect_register_by_name (regcache, "r15", &pc); ++ return pc; ++} ++ ++#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 */ ++ ++static struct regset_info microblaze_regsets[] = { ++#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, -1, NULL, NULL }, ++#endif /* HAVE_PTRACE_GETREGS */ ++ { 0, 0, 0, -1, -1, NULL, NULL } ++}; ++ ++static struct regsets_info microblaze_regsets_info = ++ { ++ microblaze_regsets, /* regsets */ ++ 0, /* num_regsets */ ++ NULL, /* disabled_regsets */ ++ }; ++ ++static struct usrregs_info microblaze_usrregs_info = ++ { ++ microblaze_num_regs, ++ microblaze_regmap, ++ }; ++ ++static struct regs_info regs_info = ++ { ++ NULL, /* regset_bitmap */ ++ µblaze_usrregs_info, ++ µblaze_regsets_info ++ }; ++ ++static const struct regs_info * ++microblaze_regs_info (void) ++{ ++ return ®s_info; ++} ++ ++static void ++microblaze_arch_setup (void) ++{ ++ current_process ()->tdesc = tdesc_microblaze; ++} ++ ++struct linux_target_ops the_low_target = { ++ microblaze_arch_setup, ++ microblaze_regs_info, ++ microblaze_cannot_fetch_register, ++ microblaze_cannot_store_register, ++ NULL, /* fetch_register */ ++ microblaze_get_pc, ++ microblaze_set_pc, ++ (const unsigned char *) µblaze_breakpoint, ++ microblaze_breakpoint_len, ++ microblaze_reinsert_addr, ++ 0, ++ microblaze_breakpoint_at, ++ NULL, ++ NULL, ++ NULL, ++ NULL, ++ microblaze_collect_ptrace_register, ++ microblaze_supply_ptrace_register, ++}; ++ ++void ++initialize_low_arch (void) ++{ ++ init_registers_microblaze (); ++ ++ initialize_regsets_info (µblaze_regsets_info); ++} +\ No newline at end of file +diff --git a/gdb/microblaze-linux-tdep.c b/gdb/microblaze-linux-tdep.c +index 99fc497..69c333e 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) +@@ -46,20 +62,27 @@ microblaze_linux_memory_remove_breakpoint (struct gdbarch *gdbarch, + int val; + int bplen; + gdb_byte old_contents[BREAKPOINT_MAX]; ++ struct cleanup *cleanup; + + /* 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. */ ++ cleanup = make_show_memory_breakpoints_cleanup (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); ++ } + ++ do_cleanups (cleanup); + return val; + } + +@@ -135,6 +158,11 @@ 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); ++ + } + + /* -Wmissing-prototypes */ +diff --git a/gdb/microblaze-tdep.c b/gdb/microblaze-tdep.c +index dcf556f..079d34e 100644 +--- a/gdb/microblaze-tdep.c ++++ b/gdb/microblaze-tdep.c +@@ -157,6 +157,39 @@ microblaze_push_dummy_call (struct gdbarch *gdbarch, struct value *function, + return sp; + } + ++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]; ++ struct cleanup *cleanup; ++ ++ /* 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. */ ++ cleanup = make_show_memory_breakpoints_cleanup (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); ++ } ++ ++ do_cleanups (cleanup); ++ return val; ++} ++ + static const gdb_byte * + microblaze_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pc, + int *len) +@@ -707,6 +740,8 @@ microblaze_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) + /* Stack grows downward. */ + set_gdbarch_inner_than (gdbarch, core_addr_lessthan); + ++ set_gdbarch_memory_remove_breakpoint (gdbarch, microblaze_linux_memory_remove_breakpoint); ++ + set_gdbarch_breakpoint_from_pc (gdbarch, microblaze_breakpoint_from_pc); + + set_gdbarch_frame_args_skip (gdbarch, 8); +diff --git a/gdb/microblaze-tdep.h b/gdb/microblaze-tdep.h +index ff4515e..9fdbda7 100644 +--- a/gdb/microblaze-tdep.h ++++ b/gdb/microblaze-tdep.h +@@ -115,6 +115,7 @@ enum microblaze_regnum + + /* 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/reg-microblaze.dat b/gdb/regformats/reg-microblaze.dat +new file mode 100644 +index 0000000..a5dd0a0 +--- /dev/null ++++ b/gdb/regformats/reg-microblaze.dat +@@ -0,0 +1,39 @@ ++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 +-- +1.7.9.5 + -- cgit v1.2.3-54-g00ecf