/* Target-dependent code for OpenBSD/amd64.
- Copyright (C) 2003-2016 Free Software Foundation, Inc.
+ Copyright (C) 2003-2021 Free Software Foundation, Inc.
This file is part of GDB.
#include "obsd-tdep.h"
#include "amd64-tdep.h"
#include "i387-tdep.h"
+#include "gdbsupport/x86-xstate.h"
#include "solib-svr4.h"
#include "bsd-uthread.h"
-/* Support for core dumps. */
-
-static void
-amd64obsd_supply_regset (const struct regset *regset,
- struct regcache *regcache, int regnum,
- const void *regs, size_t len)
-{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
- const struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- gdb_assert (len >= tdep->sizeof_gregset + I387_SIZEOF_FXSAVE);
-
- i386_supply_gregset (regset, regcache, regnum, regs, tdep->sizeof_gregset);
- amd64_supply_fxsave (regcache, regnum,
- ((const gdb_byte *)regs) + tdep->sizeof_gregset);
-}
-
-static const struct regset amd64obsd_combined_regset =
- {
- NULL, amd64obsd_supply_regset, NULL
- };
-
-static void
-amd64obsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
- iterate_over_regset_sections_cb *cb,
- void *cb_data,
- const struct regcache *regcache)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- /* OpenBSD core dumps don't use seperate register sets for the
- general-purpose and floating-point registers. */
-
- cb (".reg", tdep->sizeof_gregset + I387_SIZEOF_FXSAVE,
- &amd64obsd_combined_regset, NULL, cb_data);
-}
-\f
-
/* Support for signal handlers. */
/* Default page size. */
/* If we can't read the instructions at START_PC, return zero. */
buf = (gdb_byte *) alloca ((sizeof sigreturn) + 1);
- if (!safe_frame_unwind_memory (this_frame, start_pc + 6, buf, buflen))
+ if (!safe_frame_unwind_memory (this_frame, start_pc + 6, {buf, buflen}))
return 0;
/* Check for sigreturn(2). Depending on how the assembler encoded
/* The %rsp register points at `struct sigcontext' upon entry of a
signal trampoline. The relevant part of the trampoline is
- call *%rax
- movq %rsp, %rdi
- pushq %rdi
- movq $SYS_sigreturn,%rax
- int $0x80
+ call *%rax
+ movq %rsp, %rdi
+ pushq %rdi
+ movq $SYS_sigreturn,%rax
+ int $0x80
(see /usr/src/sys/arch/amd64/amd64/locore.S). The `pushq'
instruction clobbers %rsp, but its value is saved in `%rdi'. */
amd64obsd_supply_uthread (struct regcache *regcache,
int regnum, CORE_ADDR addr)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR sp_addr = addr + AMD64OBSD_UTHREAD_RSP_OFFSET;
CORE_ADDR sp = 0;
sp = read_memory_unsigned_integer (sp_addr, 8, byte_order);
/* Adjust the stack pointer such that it looks as if we just
- returned from _thread_machdep_switch. */
+ returned from _thread_machdep_switch. */
offset = amd64obsd_uthread_reg_offset[AMD64_RIP_REGNUM] + 8;
store_unsigned_integer (buf, 8, byte_order, sp + offset);
- regcache_raw_supply (regcache, AMD64_RSP_REGNUM, buf);
+ regcache->raw_supply (AMD64_RSP_REGNUM, buf);
}
for (i = 0; i < ARRAY_SIZE (amd64obsd_uthread_reg_offset); i++)
&& (regnum == -1 || regnum == i))
{
/* Fetch stack pointer from thread structure (if we didn't
- do so already). */
+ do so already). */
if (sp == 0)
sp = read_memory_unsigned_integer (sp_addr, 8, byte_order);
/* Read the saved register from the stack frame. */
read_memory (sp + amd64obsd_uthread_reg_offset[i], buf, 8);
- regcache_raw_supply (regcache, i, buf);
+ regcache->raw_supply (i, buf);
}
}
}
amd64obsd_collect_uthread (const struct regcache *regcache,
int regnum, CORE_ADDR addr)
{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR sp_addr = addr + AMD64OBSD_UTHREAD_RSP_OFFSET;
CORE_ADDR sp = 0;
int offset;
/* Calculate the stack pointer (frame pointer) that will be
- stored into the thread structure. */
+ stored into the thread structure. */
offset = amd64obsd_uthread_reg_offset[AMD64_RIP_REGNUM] + 8;
- regcache_raw_collect (regcache, AMD64_RSP_REGNUM, buf);
+ regcache->raw_collect (AMD64_RSP_REGNUM, buf);
sp = extract_unsigned_integer (buf, 8, byte_order) - offset;
/* Store the stack pointer. */
write_memory_unsigned_integer (sp_addr, 8, byte_order, sp);
/* The stack pointer was (potentially) modified. Make sure we
- build a proper stack frame. */
+ build a proper stack frame. */
regnum = -1;
}
&& (regnum == -1 || regnum == i))
{
/* Fetch stack pointer from thread structure (if we didn't
- calculate it already). */
+ calculate it already). */
if (sp == 0)
sp = read_memory_unsigned_integer (sp_addr, 8, byte_order);
/* Write the register into the stack frame. */
- regcache_raw_collect (regcache, i, buf);
+ regcache->raw_collect (i, buf);
write_memory (sp + amd64obsd_uthread_reg_offset[i], buf, 8);
}
}
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- amd64_init_abi (info, gdbarch);
+ amd64_init_abi (info, gdbarch,
+ amd64_target_description (X86_XSTATE_SSE_MASK, true));
obsd_init_abi (info, gdbarch);
/* Initialize general-purpose register set details. */
frame_unwind_prepend_unwinder (gdbarch, &amd64obsd_trapframe_unwind);
}
-/* Traditional (a.out) NetBSD-style core dumps. */
-
-static void
-amd64obsd_core_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
-{
- amd64obsd_init_abi (info, gdbarch);
-
- set_gdbarch_iterate_over_regset_sections
- (gdbarch, amd64obsd_iterate_over_regset_sections);
-}
-\f
-
-/* Provide a prototype to silence -Wmissing-prototypes. */
-void _initialize_amd64obsd_tdep (void);
-
+void _initialize_amd64obsd_tdep ();
void
-_initialize_amd64obsd_tdep (void)
+_initialize_amd64obsd_tdep ()
{
/* The OpenBSD/amd64 native dependent code makes this assumption. */
gdb_assert (ARRAY_SIZE (amd64obsd_r_reg_offset) == AMD64_NUM_GREGS);
gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
- GDB_OSABI_OPENBSD_ELF, amd64obsd_init_abi);
-
- /* OpenBSD uses traditional (a.out) NetBSD-style core dumps. */
- gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
- GDB_OSABI_NETBSD_AOUT, amd64obsd_core_init_abi);
+ GDB_OSABI_OPENBSD, amd64obsd_init_abi);
}
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