From e3ac4a1e11ab967067fda23a41cc77c5b3dc3382 Mon Sep 17 00:00:00 2001 From: Mark Kettenis Date: Tue, 18 Jul 2006 21:10:28 +0000 Subject: * armobsd-tdep.c: Include "trad-frame.h" and "tramp-frame.h". (armobsd_sigframe_init): New function. (armobsd_sigframe): New variable. (armobsd_init_abi): Prepend armobsd_sigframe unwinder. * Makefile.in (armobsd-tdep.o): Update dependencies. --- gdb/armobsd-tdep.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) (limited to 'gdb/armobsd-tdep.c') diff --git a/gdb/armobsd-tdep.c b/gdb/armobsd-tdep.c index 64c8338..0f5e7a4 100644 --- a/gdb/armobsd-tdep.c +++ b/gdb/armobsd-tdep.c @@ -21,11 +21,55 @@ #include "defs.h" #include "osabi.h" +#include "trad-frame.h" +#include "tramp-frame.h" #include "obsd-tdep.h" #include "arm-tdep.h" #include "solib-svr4.h" +/* Signal trampolines. */ + +static void +armobsd_sigframe_init (const struct tramp_frame *self, + struct frame_info *next_frame, + struct trad_frame_cache *cache, + CORE_ADDR func) +{ + CORE_ADDR sp, sigcontext_addr, addr; + int regnum; + + /* We find the appropriate instance of `struct sigcontext' at a + fixed offset in the signal frame. */ + sp = frame_unwind_register_signed (next_frame, ARM_SP_REGNUM); + sigcontext_addr = sp + 16; + + /* PC. */ + trad_frame_set_reg_addr (cache, ARM_PC_REGNUM, sigcontext_addr + 76); + + /* GPRs. */ + for (regnum = ARM_A1_REGNUM, addr = sigcontext_addr + 12; + regnum <= ARM_LR_REGNUM; regnum++, addr += 4) + trad_frame_set_reg_addr (cache, regnum, addr); + + trad_frame_set_id (cache, frame_id_build (sp, func)); +} + +static const struct tramp_frame armobsd_sigframe = +{ + SIGTRAMP_FRAME, + 4, + { + { 0xe28d0010, -1 }, /* add r0, sp, #16 */ + { 0xef000067, -1 }, /* swi SYS_sigreturn */ + { 0xef000001, -1 }, /* swi SYS_exit */ + { 0xeafffffc, -1 }, /* b . - 8 */ + { TRAMP_SENTINEL_INSN, -1 } + }, + armobsd_sigframe_init +}; + + static void armobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) @@ -35,6 +79,8 @@ armobsd_init_abi (struct gdbarch_info info, if (tdep->fp_model == ARM_FLOAT_AUTO) tdep->fp_model = ARM_FLOAT_SOFT_VFP; + tramp_frame_prepend_unwinder (gdbarch, &armobsd_sigframe); + /* OpenBSD/arm uses SVR4-style shared libraries. */ set_solib_svr4_fetch_link_map_offsets (gdbarch, svr4_ilp32_fetch_link_map_offsets); -- cgit v1.1