From 15b8867d9ec82299441188388bbed4a7ca62eba6 Mon Sep 17 00:00:00 2001 From: Atle Nissestad Date: Mon, 3 Dec 2007 23:34:28 +0100 Subject: [PATCH] gdbserver: Added initial support for nios2 in gdbserver Note: This is untested code and not expected to work as is. Signed-off-by: Atle Nissestad --- user/gdbserver/gdbserver/Makefile.in | 4 + user/gdbserver/gdbserver/configure.srv | 4 + user/gdbserver/gdbserver/linux-nios2-low.c | 88 ++++++++++++++++++++++++++++ user/gdbserver/regformats/reg-nios2.dat | 47 +++++++++++++++ 4 files changed, 143 insertions(+), 0 deletions(-) create mode 100644 user/gdbserver/gdbserver/linux-nios2-low.c create mode 100644 user/gdbserver/regformats/reg-nios2.dat diff --git a/user/gdbserver/gdbserver/Makefile.in b/user/gdbserver/gdbserver/Makefile.in index 429ca55..a5a3c9e 100644 --- a/user/gdbserver/gdbserver/Makefile.in +++ b/user/gdbserver/gdbserver/Makefile.in @@ -284,6 +284,7 @@ linux-ia64-low.o: linux-ia64-low.c $(linux_low_h) $(server_h) linux-m32r-low.o: linux-m32r-low.c $(linux_low_h) $(server_h) linux-mips-low.o: linux-mips-low.c $(linux_low_h) $(server_h) \ $(gdb_proc_service_h) +linux-nios2-low.o: linux-nios2-low.c $(linux_low_h) $(server_h) linux-ppc-low.o: linux-ppc-low.c $(linux_low_h) $(server_h) linux-ppc64-low.o: linux-ppc64-low.c $(linux_low_h) $(server_h) linux-s390-low.o: linux-s390-low.c $(linux_low_h) $(server_h) @@ -325,6 +326,9 @@ reg-m68k.c : $(srcdir)/../regformats/reg-m68k.dat $(regdat_sh) reg-mips.o : reg-mips.c $(regdef_h) reg-mips.c : $(srcdir)/../regformats/reg-mips.dat $(regdat_sh) sh $(regdat_sh) $(srcdir)/../regformats/reg-mips.dat reg-mips.c +reg-nios2.o : reg-nios2.c $(regdef_h) +reg-nios2.c : $(srcdir)/../regformats/reg-nios2.dat $(regdat_sh) + sh $(regdat_sh) $(srcdir)/../regformats/reg-nios2.dat reg-nios2.c reg-ppc.o : reg-ppc.c $(regdef_h) reg-ppc.c : $(srcdir)/../regformats/reg-ppc.dat $(regdat_sh) sh $(regdat_sh) $(srcdir)/../regformats/reg-ppc.dat reg-ppc.c diff --git a/user/gdbserver/gdbserver/configure.srv b/user/gdbserver/gdbserver/configure.srv index 42ab123..5abac70 100644 --- a/user/gdbserver/gdbserver/configure.srv +++ b/user/gdbserver/gdbserver/configure.srv @@ -77,6 +77,10 @@ case "${target}" in srv_linux_usrregs=yes srv_linux_thread_db=yes ;; + nios2-*-linux*) srv_regobj=reg-nios2.o + srv_tgtobj="linux-low.o linux-nios2-low.o" + srv_linux_usrregs=yes + ;; powerpc64-*-linux*) srv_regobj=reg-ppc64.o srv_tgtobj="linux-low.o linux-ppc64-low.o" srv_linux_usrregs=yes diff --git a/user/gdbserver/gdbserver/linux-nios2-low.c b/user/gdbserver/gdbserver/linux-nios2-low.c new file mode 100644 index 0000000..4ea2b26 --- /dev/null +++ b/user/gdbserver/gdbserver/linux-nios2-low.c @@ -0,0 +1,88 @@ +/* GNU/Linux/Nios2 specific low level interface for the remote server for GDB */ + +#include "server.h" +#include "linux-low.h" + +#ifdef HAVE_SYS_REG_H +#include +#endif + +#include + +/* FIXME: Definitions in gdb/nios2-tdep.c and asm/ptrace.h does not quite agree... */ +static int nios2_regmap[] = +{ + PTR_R0 * 4, PTR_R1 * 4, PTR_R2 * 4, PTR_R3 * 4, + PTR_R4 * 4, PTR_R5 * 4, PTR_R6 * 4, PTR_R7 * 4, + PTR_R8 * 4, PTR_R9 * 4, PTR_R10 * 4, PTR_R11 * 4, + PTR_R12 * 4, PTR_R13 * 4, PTR_R14 * 4, PTR_R15 * 4, + + PTR_R16 * 4, PTR_R17 * 4, PTR_R18 * 4, PTR_R19 * 4, + PTR_R20 * 4, PTR_R21 * 4, PTR_R22 * 4, PTR_R23 * 4, + PTR_R24 * 4, PTR_R25 * 4, + + PTR_GP * 4, PTR_SP * 4, PTR_FP * 4, PTR_EA * 4, + PTR_BA * 4, PTR_RA * 4, + (PTR_RA + 1) * 4, (PTR_RA + 2) * 4, (PTR_RA + 3) * 4, + (PTR_RA + 4) * 4, (PTR_RA + 5) * 4, (PTR_RA + 6) * 4 +}; + +#define nios2_num_regs (sizeof(nios2_regmap) / sizeof(nios2_regmap[0])) + +static int +nios2_cannot_store_register (int regno) +{ + return (regno >= nios2_num_regs); +} + +static int +nios2_cannot_fetch_register (int regno) +{ + return (regno >= nios2_num_regs); +} + +static CORE_ADDR +nios2_get_pc () +{ + unsigned long pc; + collect_register_by_name ("pc", &pc); + return pc; +} + +static void +nios2_set_pc (CORE_ADDR pc) +{ + unsigned long newpc = pc; + supply_register_by_name ("pc", &newpc); +} + +static const unsigned long nios2_breakpoint = 0x003da03a; +#define nios2_breakpoint_len 4 + +static int +nios2_breakpoint_at (CORE_ADDR where) +{ + unsigned long insn; + + (*the_target->read_memory) (where, (char *) &insn, nios2_breakpoint_len); + if (insn == nios2_breakpoint) + return 1; + + /* If necessary, recognize more trap instructions here. GDB only uses the + one. */ + return 0; +} + +struct linux_target_ops the_low_target = { + nios2_num_regs, + nios2_regmap, + nios2_cannot_fetch_register, + nios2_cannot_store_register, + nios2_get_pc, + nios2_set_pc, + (const char *) &nios2_breakpoint, + nios2_breakpoint_len, + NULL, + 0, + nios2_breakpoint_at, +}; diff --git a/user/gdbserver/regformats/reg-nios2.dat b/user/gdbserver/regformats/reg-nios2.dat new file mode 100644 index 0000000..6881ad1 --- /dev/null +++ b/user/gdbserver/regformats/reg-nios2.dat @@ -0,0 +1,47 @@ +name:nios2 +expedite:sp,fp,pc +32:zero +32:at +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:et +32:bt +32:gp +32:sp +32:fp +32:ea +32:ba +32:ra +32:pc +32:status +32:estatus +32:bstatus +32:ienable +32:ipending +32:cpuid +32:ctl6 +32:ctl7 +32:pteaddr +32:tlbacc +32:tlbmisc + -- 1.5.3.3