/* Target-dependent code for OpenBSD/sparc64.
- Copyright 2004 Free Software Foundation, Inc.
+ Copyright 2004, 2005 Free Software Foundation, Inc.
This file is part of GDB.
#include "osabi.h"
#include "regset.h"
#include "symtab.h"
+#include "objfiles.h"
#include "solib-svr4.h"
#include "trad-frame.h"
#include "gdb_assert.h"
#include "sparc64-tdep.h"
-#include "nbsd-tdep.h"
/* OpenBSD uses the traditional NetBSD core file format, even for
ports that use ELF. The core files don't use multiple register
{
const char *regs = gregs;
- sparc64_supply_gregset (regset->descr, regcache, regnum, regs);
+ sparc64_supply_gregset (&sparc64obsd_core_gregset, regcache, regnum, regs);
sparc64_supply_fpregset (regcache, regnum, regs + 288);
}
\f
The signal trampoline will be mapped at an address that is page
aligned. We recognize the signal trampoline by the looking for the
- sigreturn system call. */
+ sigreturn system call. The offset where we can find the code that
+ makes this system call varies from release to release. For OpenBSD
+ 3.6 and later releases we can find the code at offset 0xec. For
+ OpenBSD 3.5 and earlier releases, we find it at offset 0xe8. */
static const int sparc64obsd_page_size = 8192;
+static const int sparc64obsd_sigreturn_offset[] = { 0xec, 0xe8, -1 };
static int
sparc64obsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
{
CORE_ADDR start_pc = (pc & ~(sparc64obsd_page_size - 1));
unsigned long insn;
+ const int *offset;
if (name)
return 0;
- /* Check for "restore %g0, SYS_sigreturn, %g1". */
- insn = sparc_fetch_instruction (start_pc + 0xe8);
- if (insn != 0x83e82067)
- return 0;
+ for (offset = sparc64obsd_sigreturn_offset; *offset != -1; offset++)
+ {
+ /* Check for "restore %g0, SYS_sigreturn, %g1". */
+ insn = sparc_fetch_instruction (start_pc + *offset);
+ if (insn != 0x83e82067)
+ continue;
- /* Check for "t ST_SYSCALL". */
- insn = sparc_fetch_instruction (start_pc + 0xf0);
- if (insn != 0x91d02000)
- return 0;
+ /* Check for "t ST_SYSCALL". */
+ insn = sparc_fetch_instruction (start_pc + *offset + 8);
+ if (insn != 0x91d02000)
+ continue;
- return 1;
+ return 1;
+ }
+
+ return 0;
}
static struct sparc_frame_cache *
initialized under the assumption that we're frameless. */
cache->frameless_p = 0;
addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM);
+ if (addr & 1)
+ addr += BIAS;
cache->base = addr;
}
/* We find the appropriate instance of `struct sigcontext' at a
fixed offset in the signal frame. */
- addr = cache->base + BIAS + 128 + 16;
+ addr = cache->base + 128 + 16;
cache->saved_regs = sparc64nbsd_sigcontext_saved_regs (addr, next_frame);
return cache;
struct sparc_frame_cache *cache =
sparc64obsd_frame_cache (next_frame, this_cache);
- trad_frame_prev_register (next_frame, cache->saved_regs, regnum,
- optimizedp, lvalp, addrp, realnump, valuep);
+ trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, valuep);
}
static const struct frame_unwind sparc64obsd_frame_unwind =
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- tdep->gregset = regset_alloc (gdbarch, &sparc64obsd_core_gregset,
- sparc64obsd_supply_gregset, NULL);
+ tdep->gregset = regset_alloc (gdbarch, sparc64obsd_supply_gregset, NULL);
tdep->sizeof_gregset = 832;
frame_unwind_append_sniffer (gdbarch, sparc64obsd_sigtramp_frame_sniffer);
sparc64_init_abi (info, gdbarch);
+ /* OpenBSD/sparc64 has SVR4-style shared libraries. */
+ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, nbsd_lp64_solib_svr4_fetch_link_map_offsets);
+ (gdbarch, svr4_lp64_fetch_link_map_offsets);
}
-
\f
+
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_sparc64obsd_tdep (void);