X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fsparc-linux-tdep.c;h=23c1f2357df2fed637d160bb1244bec738e6cf17;hb=ed49a04fe1bc299bc4b22c01a15c1f46ae21a294;hp=28c966c0c92eefe315347e9dd12a7f794b1742aa;hpb=70f1dc74c3a50a71c2b103c8fcc997d13ba62f1d;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/sparc-linux-tdep.c b/gdb/sparc-linux-tdep.c index 28c966c0c9..23c1f2357d 100644 --- a/gdb/sparc-linux-tdep.c +++ b/gdb/sparc-linux-tdep.c @@ -1,12 +1,12 @@ /* Target-dependent code for GNU/Linux SPARC. - Copyright 2003, 2004, 2005 Free Software Foundation, Inc. + Copyright (C) 2003, 2004, 2005, 2007, 2008 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 2 of the License, or + 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, @@ -15,14 +15,14 @@ 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, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + along with this program. If not, see . */ #include "defs.h" -#include "floatformat.h" +#include "dwarf2-frame.h" #include "frame.h" #include "frame-unwind.h" +#include "gdbtypes.h" +#include "regset.h" #include "gdbarch.h" #include "gdbcore.h" #include "osabi.h" @@ -91,7 +91,7 @@ sparc32_linux_sigframe_init (const struct tramp_frame *self, struct trad_frame_cache *this_cache, CORE_ADDR func) { - CORE_ADDR base, addr; + CORE_ADDR base, addr, sp_addr; int regnum; base = frame_unwind_register_unsigned (next_frame, SPARC_O1_REGNUM); @@ -107,13 +107,16 @@ sparc32_linux_sigframe_init (const struct tramp_frame *self, /* Since %g0 is always zero, keep the identity encoding. */ addr = base + 20; + sp_addr = base + 16 + ((SPARC_SP_REGNUM - SPARC_G0_REGNUM) * 4); for (regnum = SPARC_G1_REGNUM; regnum <= SPARC_O7_REGNUM; regnum++) { trad_frame_set_reg_addr (this_cache, regnum, addr); addr += 4; } - base = addr = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM); + base = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM); + addr = get_frame_memory_unsigned (next_frame, sp_addr, 4); + for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++) { trad_frame_set_reg_addr (this_cache, regnum, addr); @@ -121,6 +124,93 @@ sparc32_linux_sigframe_init (const struct tramp_frame *self, } trad_frame_set_id (this_cache, frame_id_build (base, func)); } + +/* Return the address of a system call's alternative return + address. */ + +static CORE_ADDR +sparc32_linux_step_trap (struct frame_info *frame, unsigned long insn) +{ + if (insn == 0x91d02010) + { + ULONGEST sc_num = get_frame_register_unsigned (frame, SPARC_G1_REGNUM); + + /* __NR_rt_sigreturn is 101 and __NR_sigreturn is 216 */ + if (sc_num == 101 || sc_num == 216) + { + ULONGEST sp, pc_offset; + + sp = get_frame_register_unsigned (frame, SPARC_SP_REGNUM); + + /* The kernel puts the sigreturn registers on the stack, + and this is where the signal unwinding state is take from + when returning from a signal. + + For __NR_sigreturn, this register area sits 96 bytes from + the base of the stack. The saved PC sits 4 bytes into the + sigreturn register save area. + + For __NR_rt_sigreturn a siginfo_t, which is 128 bytes, sits + right before the sigreturn register save area. */ + + pc_offset = 96 + 4; + if (sc_num == 101) + pc_offset += 128; + + return read_memory_unsigned_integer (sp + pc_offset, 4); + } + } + + return 0; +} + + +const struct sparc_gregset sparc32_linux_core_gregset = +{ + 32 * 4, /* %psr */ + 33 * 4, /* %pc */ + 34 * 4, /* %npc */ + 35 * 4, /* %y */ + -1, /* %wim */ + -1, /* %tbr */ + 1 * 4, /* %g1 */ + 16 * 4, /* %l0 */ + 4, /* y size */ +}; + + +static void +sparc32_linux_supply_core_gregset (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *gregs, size_t len) +{ + sparc32_supply_gregset (&sparc32_linux_core_gregset, regcache, regnum, gregs); +} + +static void +sparc32_linux_collect_core_gregset (const struct regset *regset, + const struct regcache *regcache, + int regnum, void *gregs, size_t len) +{ + sparc32_collect_gregset (&sparc32_linux_core_gregset, regcache, regnum, gregs); +} + +static void +sparc32_linux_supply_core_fpregset (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *fpregs, size_t len) +{ + sparc32_supply_fpregset (regcache, regnum, fpregs); +} + +static void +sparc32_linux_collect_core_fpregset (const struct regset *regset, + const struct regcache *regcache, + int regnum, void *fpregs, size_t len) +{ + sparc32_collect_fpregset (regcache, regnum, fpregs); +} + static void @@ -128,6 +218,14 @@ sparc32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + tdep->gregset = regset_alloc (gdbarch, sparc32_linux_supply_core_gregset, + sparc32_linux_collect_core_gregset); + tdep->sizeof_gregset = 152; + + tdep->fpregset = regset_alloc (gdbarch, sparc32_linux_supply_core_fpregset, + sparc32_linux_collect_core_fpregset); + tdep->sizeof_fpregset = 396; + tramp_frame_prepend_unwinder (gdbarch, &sparc32_linux_sigframe); tramp_frame_prepend_unwinder (gdbarch, &sparc32_linux_rt_sigframe); @@ -142,11 +240,17 @@ sparc32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* GNU/Linux doesn't support the 128-bit `long double' from the psABI. */ set_gdbarch_long_double_bit (gdbarch, 64); - set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big); + set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double); /* Enable TLS support. */ set_gdbarch_fetch_tls_load_module_address (gdbarch, svr4_fetch_objfile_link_map); + + /* Make sure we can single-step over signal return system calls. */ + tdep->step_trap = sparc32_linux_step_trap; + + /* Hook in the DWARF CFI frame unwinder. */ + frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer); } /* Provide a prototype to silence -Wmissing-prototypes. */