diff options
Diffstat (limited to 'gdb/i386fbsd-tdep.c')
| -rw-r--r-- | gdb/i386fbsd-tdep.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/gdb/i386fbsd-tdep.c b/gdb/i386fbsd-tdep.c index ed41706..99e08cb 100644 --- a/gdb/i386fbsd-tdep.c +++ b/gdb/i386fbsd-tdep.c @@ -22,6 +22,9 @@ #include "gdbcore.h" #include "osabi.h" #include "regcache.h" +#include "regset.h" +#include "i386fbsd-tdep.h" +#include "x86-xstate.h" #include "i386-tdep.h" #include "i387-tdep.h" @@ -235,6 +238,100 @@ static int i386fbsd_jmp_buf_reg_offset[] = 0 * 4 /* %eip */ }; +/* Get XSAVE extended state xcr0 from core dump. */ + +uint64_t +i386fbsd_core_read_xcr0 (bfd *abfd) +{ + asection *xstate = bfd_get_section_by_name (abfd, ".reg-xstate"); + uint64_t xcr0; + + if (xstate) + { + size_t size = bfd_section_size (abfd, xstate); + + /* Check extended state size. */ + if (size < X86_XSTATE_AVX_SIZE) + xcr0 = X86_XSTATE_SSE_MASK; + else + { + char contents[8]; + + if (! bfd_get_section_contents (abfd, xstate, contents, + I386_FBSD_XSAVE_XCR0_OFFSET, + 8)) + { + warning (_("Couldn't read `xcr0' bytes from " + "`.reg-xstate' section in core file.")); + return 0; + } + + xcr0 = bfd_get_64 (abfd, contents); + } + } + else + xcr0 = 0; + + return xcr0; +} + +/* Implement the core_read_description gdbarch method. */ + +static const struct target_desc * +i386fbsd_core_read_description (struct gdbarch *gdbarch, + struct target_ops *target, + bfd *abfd) +{ + return i386_target_description (i386fbsd_core_read_xcr0 (abfd)); +} + +/* Similar to i386_supply_fpregset, but use XSAVE extended state. */ + +static void +i386fbsd_supply_xstateregset (const struct regset *regset, + struct regcache *regcache, int regnum, + const void *xstateregs, size_t len) +{ + i387_supply_xsave (regcache, regnum, xstateregs); +} + +/* Similar to i386_collect_fpregset, but use XSAVE extended state. */ + +static void +i386fbsd_collect_xstateregset (const struct regset *regset, + const struct regcache *regcache, + int regnum, void *xstateregs, size_t len) +{ + i387_collect_xsave (regcache, regnum, xstateregs, 1); +} + +/* Register set definitions. */ + +static const struct regset i386fbsd_xstateregset = + { + NULL, + i386fbsd_supply_xstateregset, + i386fbsd_collect_xstateregset + }; + +/* Iterate over core file register note sections. */ + +static void +i386fbsd_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); + + cb (".reg", tdep->sizeof_gregset, &i386_gregset, NULL, cb_data); + cb (".reg2", tdep->sizeof_fpregset, &i386_fpregset, NULL, cb_data); + + if (tdep->xcr0 & X86_XSTATE_AVX) + cb (".reg-xstate", X86_XSTATE_SIZE(tdep->xcr0), + &i386fbsd_xstateregset, "XSAVE extended state", cb_data); +} + static void i386fbsd_supply_uthread (struct regcache *regcache, int regnum, CORE_ADDR addr) @@ -376,6 +473,15 @@ i386fbsd4_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* FreeBSD 4.0 introduced a new `struct sigcontext'. */ tdep->sc_reg_offset = i386fbsd4_sc_reg_offset; tdep->sc_num_regs = ARRAY_SIZE (i386fbsd4_sc_reg_offset); + + tdep->xsave_xcr0_offset = I386_FBSD_XSAVE_XCR0_OFFSET; + + /* Iterate over core file register note sections. */ + set_gdbarch_iterate_over_regset_sections + (gdbarch, i386fbsd_iterate_over_regset_sections); + + set_gdbarch_core_read_description (gdbarch, + i386fbsd_core_read_description); } |