diff options
Diffstat (limited to 'meta-xilinx-bsp/recipes-microblaze/gdb/files/0006-Patch-microblaze-Add-initial-port-of-linux-gdbserver.patch')
| -rw-r--r-- | meta-xilinx-bsp/recipes-microblaze/gdb/files/0006-Patch-microblaze-Add-initial-port-of-linux-gdbserver.patch | 553 |
1 files changed, 553 insertions, 0 deletions
diff --git a/meta-xilinx-bsp/recipes-microblaze/gdb/files/0006-Patch-microblaze-Add-initial-port-of-linux-gdbserver.patch b/meta-xilinx-bsp/recipes-microblaze/gdb/files/0006-Patch-microblaze-Add-initial-port-of-linux-gdbserver.patch new file mode 100644 index 00000000..cb2eec18 --- /dev/null +++ b/meta-xilinx-bsp/recipes-microblaze/gdb/files/0006-Patch-microblaze-Add-initial-port-of-linux-gdbserver.patch @@ -0,0 +1,553 @@ +From 2112c9ded01ddd08f0e31e5ce23eecac6c04e8c4 Mon Sep 17 00:00:00 2001 +From: David Holsgrove <david.holsgrove@petalogix.com> +Date: Mon, 6 Feb 2012 10:28:29 +1000 +Subject: [PATCH 06/16] [Patch, microblaze]: 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 + * gdb/configure.tgt: Set build_gdbserver=yes + * 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> +Upstream-Status: Pending +--- + gdb/configure.host | 3 + + gdb/configure.tgt | 1 + + gdb/gdbserver/Makefile.in | 4 + + gdb/gdbserver/configure.srv | 6 + + gdb/gdbserver/linux-microblaze-low.c | 228 +++++++++++++++++++++++++++++++++++ + gdb/microblaze-linux-tdep.c | 25 +++- + gdb/microblaze-tdep.c | 45 ++++++- + gdb/microblaze-tdep.h | 3 +- + gdb/regformats/reg-microblaze.dat | 39 ++++++ + 9 files changed, 348 insertions(+), 6 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 15a8288..76cc5fe 100644 +--- a/gdb/configure.host ++++ b/gdb/configure.host +@@ -59,6 +59,7 @@ 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 ;; +@@ -133,6 +134,8 @@ mips*-*-netbsd* | mips*-*-knetbsd*-gnu) + gdb_host=nbsd ;; + 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/configure.tgt b/gdb/configure.tgt +index 9297c56..3a7951a 100644 +--- a/gdb/configure.tgt ++++ b/gdb/configure.tgt +@@ -343,6 +343,7 @@ microblaze*-linux-*|microblaze*-*-linux*) + gdb_target_obs="microblaze-tdep.o microblaze-linux-tdep.o microblaze-rom.o glibc-tdep.o \ + monitor.o dsrec.o solib-svr4.o symfile-mem.o linux-tdep.o" + gdb_sim=../sim/microblaze/libsim.a ++ build_gdbserver=yes + ;; + microblaze*-*-*) + # Target: Xilinx MicroBlaze running standalone +diff --git a/gdb/gdbserver/Makefile.in b/gdb/gdbserver/Makefile.in +index f773fa2..a11ace1 100644 +--- a/gdb/gdbserver/Makefile.in ++++ b/gdb/gdbserver/Makefile.in +@@ -148,6 +148,7 @@ SFILES= $(srcdir)/gdbreplay.c $(srcdir)/inferiors.c $(srcdir)/dll.c \ + $(srcdir)/linux-ia64-low.c $(srcdir)/linux-low.c \ + $(srcdir)/linux-m32r-low.c \ + $(srcdir)/linux-m68k-low.c $(srcdir)/linux-mips-low.c \ ++ $(srcdir)/linux-microblaze-low.c \ + $(srcdir)/linux-nios2-low.c \ + $(srcdir)/linux-ppc-low.c \ + $(srcdir)/linux-s390-low.c \ +@@ -329,6 +330,7 @@ clean: + rm -f arm-with-iwmmxt.c + rm -f arm-with-vfpv2.c arm-with-vfpv3.c arm-with-neon.c + rm -f mips-linux.c mips64-linux.c ++ rm -f microblaze-linux.c + rm -f nios2-linux.c + rm -f powerpc-32.c powerpc-32l.c powerpc-64l.c powerpc-e500l.c + rm -f powerpc-altivec32l.c powerpc-cell32l.c powerpc-vsx32l.c +@@ -612,6 +614,8 @@ reg-m68k.c : $(srcdir)/../regformats/reg-m68k.dat $(regdat_sh) + $(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-m68k.dat reg-m68k.c + reg-cf.c : $(srcdir)/../regformats/reg-cf.dat $(regdat_sh) + $(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-cf.dat reg-cf.c ++microblaze-linux.c : $(srcdir)/../regformats/reg-microblaze.dat $(regdat_sh) ++ $(SHELL) $(regdat_sh) $(srcdir)/../regformats/reg-microblaze.dat microblaze-linux.c + mips-linux.c : $(srcdir)/../regformats/mips-linux.dat $(regdat_sh) + $(SHELL) $(regdat_sh) $(srcdir)/../regformats/mips-linux.dat mips-linux.c + mips-dsp-linux.c : $(srcdir)/../regformats/mips-dsp-linux.dat $(regdat_sh) +diff --git a/gdb/gdbserver/configure.srv b/gdb/gdbserver/configure.srv +index cc4f53d..359c756 100644 +--- a/gdb/gdbserver/configure.srv ++++ b/gdb/gdbserver/configure.srv +@@ -198,6 +198,12 @@ case "${target}" in + srv_linux_usrregs=yes + srv_linux_thread_db=yes + ;; ++ microblaze*-*-linux*) srv_regobj=microblaze-linux.o ++ srv_tgtobj="$srv_linux_obj linux-microblaze-low.o" ++ srv_linux_usrregs=yes ++ srv_linux_regsets=yes ++ srv_linux_thread_db=yes ++ ;; + nios2*-*-linux*) srv_regobj="nios2-linux.o" + srv_tgtobj="$srv_linux_obj linux-nios2-low.o" + srv_xmlfiles="nios2-linux.xml" +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 <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); ++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 7e6b61b..cf58e21 100644 +--- a/gdb/microblaze-linux-tdep.c ++++ b/gdb/microblaze-linux-tdep.c +@@ -38,6 +38,22 @@ + #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) +@@ -47,20 +63,27 @@ 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; + } + +diff --git a/gdb/microblaze-tdep.c b/gdb/microblaze-tdep.c +index 50b68d2..1c6dbfe 100644 +--- a/gdb/microblaze-tdep.c ++++ b/gdb/microblaze-tdep.c +@@ -164,6 +164,39 @@ 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) +@@ -291,8 +324,8 @@ microblaze_analyze_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, + + for (addr = func_addr; addr < stop; addr += INST_WORD_SIZE) + { +- //insn = microblaze_fetch_instruction (addr); +- insn = insn_block[(addr - func_addr) / INST_WORD_SIZE]; ++ insn = microblaze_fetch_instruction (addr); ++ //insn = insn_block[(addr - func_addr) / INST_WORD_SIZE]; + op = microblaze_decode_insn (insn, &rd, &ra, &rb, &imm); + microblaze_debug ("%s %08lx op=%x r%d r%d imm=%d\n", paddress (gdbarch, addr), insn, op, rd, ra, imm); + +@@ -724,13 +757,15 @@ microblaze_software_single_step (struct frame_info *frame) + rb = get_frame_register_unsigned (frame, lrb); + else + rb = 0; ++ + stepbreaks[1].address = microblaze_get_target_address (insn, immfound, imm, pc, ra, rb, &targetvalid, &unconditionalbranch); +- microblaze_debug ("single-step uncondbr=%d targetvalid=%d target=%x\n", unconditionalbranch, targetvalid, stepbreaks[1].address); ++ microblaze_debug ("single-step uncondbr=%d targetvalid=%d target=%x\n", unconditionalbranch, targetvalid, stepbreaks[1].address); ++ + if (unconditionalbranch) + stepbreaks[0].valid = FALSE; /* This is a unconditional branch: will not come to the next address */ + if (targetvalid && (stepbreaks[0].valid == FALSE || + (stepbreaks[0].address != stepbreaks[1].address)) +- && (stepbreaks[1].address != pc)) { ++ && (stepbreaks[1].address != pc)) { + stepbreaks[1].valid = TRUE; + } else { + stepbreaks[1].valid = FALSE; +@@ -900,6 +935,8 @@ 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_software_single_step (gdbarch, microblaze_software_single_step); + +diff --git a/gdb/microblaze-tdep.h b/gdb/microblaze-tdep.h +index fec24b9..98aa0f5 100644 +--- a/gdb/microblaze-tdep.h ++++ b/gdb/microblaze-tdep.h +@@ -129,7 +129,8 @@ 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} + + extern void microblaze_supply_gregset (const struct microblaze_gregset *gregset, + struct regcache *regcache, +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 +-- +1.9.0 + |