diff options
Diffstat (limited to 'meta-xilinx-bsp/recipes-microblaze/binutils/binutils/0032-Add-initial-port-of-linux-gdbserver.patch')
| -rw-r--r-- | meta-xilinx-bsp/recipes-microblaze/binutils/binutils/0032-Add-initial-port-of-linux-gdbserver.patch | 435 |
1 files changed, 0 insertions, 435 deletions
diff --git a/meta-xilinx-bsp/recipes-microblaze/binutils/binutils/0032-Add-initial-port-of-linux-gdbserver.patch b/meta-xilinx-bsp/recipes-microblaze/binutils/binutils/0032-Add-initial-port-of-linux-gdbserver.patch deleted file mode 100644 index 7ac89d2d..00000000 --- a/meta-xilinx-bsp/recipes-microblaze/binutils/binutils/0032-Add-initial-port-of-linux-gdbserver.patch +++ /dev/null @@ -1,435 +0,0 @@ -From c347f9727cc86bb0174dc001446c0670e7306692 Mon Sep 17 00:00:00 2001 -From: Mahesh Bodapati <mbodapat@xilinx.com> -Date: Mon, 23 Jan 2017 19:07:44 +0530 -Subject: [PATCH 32/43] 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 <david.holsgrove@petalogix.com> -Signed-off-by: Nathan Rossi <nathan.rossi@petalogix.com> ---- - gdb/configure.host | 3 + - gdb/gdbserver/linux-microblaze-low.c | 189 +++++++++++++++++++++++++++ - gdb/microblaze-linux-tdep.c | 29 +++- - gdb/microblaze-tdep.c | 35 ++++- - gdb/microblaze-tdep.h | 4 +- - gdb/regformats/reg-microblaze.dat | 41 ++++++ - 6 files changed, 298 insertions(+), 3 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 c87f997abc..de8d6b00f3 100644 ---- a/gdb/configure.host -+++ b/gdb/configure.host -@@ -65,6 +65,7 @@ hppa*) gdb_host_cpu=pa ;; - i[34567]86*) gdb_host_cpu=i386 ;; - 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 ;; -@@ -133,6 +134,8 @@ mips*-*-netbsd* | mips*-*-knetbsd*-gnu) - mips*-*-freebsd*) gdb_host=fbsd ;; - mips64*-*-openbsd*) gdb_host=obsd64 ;; - -+microblaze*-*linux*) gdb_host=linux ;; -+ - powerpc-*-aix* | rs6000-*-* | powerpc64-*-aix*) - 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 0000000000..cba5d6fc58 ---- /dev/null -+++ b/gdb/gdbserver/linux-microblaze-low.c -@@ -0,0 +1,189 @@ -+/* 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 <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 -+ }; -+ -+#define microblaze_num_regs (sizeof microblaze_regmap / sizeof microblaze_regmap[0]) -+ -+/* Defined in auto-generated file microblaze-linux.c. */ -+void init_registers_microblaze (void); -+ -+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 (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 (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 */ -+ -+struct regset_info target_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 } -+}; -+ -+struct linux_target_ops the_low_target = { -+ init_registers_microblaze, -+ microblaze_num_regs, -+ microblaze_regmap, -+ NULL, -+ 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, -+}; -diff --git a/gdb/microblaze-linux-tdep.c b/gdb/microblaze-linux-tdep.c -index 4e5f60cd4e..7ab650a1cc 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) -@@ -46,18 +62,25 @@ 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); - -+ /* 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; - } - -@@ -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 -diff --git a/gdb/microblaze-tdep.c b/gdb/microblaze-tdep.c -index 1248acbdc9..730a2b281f 100644 ---- a/gdb/microblaze-tdep.c -+++ b/gdb/microblaze-tdep.c -@@ -137,7 +137,38 @@ 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]; -+ 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; -+} - - /* Allocate and initialize a frame cache. */ - -@@ -731,6 +762,7 @@ 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); - -@@ -770,4 +802,5 @@ When non-zero, microblaze specific debugging is enabled."), - NULL, - &setdebuglist, &showdebuglist); - -+ - } -diff --git a/gdb/microblaze-tdep.h b/gdb/microblaze-tdep.h -index a0048148e4..63aab84ef6 100644 ---- a/gdb/microblaze-tdep.h -+++ b/gdb/microblaze-tdep.h -@@ -117,6 +117,8 @@ 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/reg-microblaze.dat b/gdb/regformats/reg-microblaze.dat -new file mode 100644 -index 0000000000..bd8a438442 ---- /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 --- -2.17.1 - |