mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-03-01 13:26:47 +08:00
Revert "gdb/gdbserver: share x86/linux tdesc caching"
This reverts commit 198ff6ff81.
This commit is contained in:
Andrew Burgess
parent
57d8b51d90
commit
69324a74e3
@ -1579,6 +1579,37 @@ amd64_linux_record_signal (struct gdbarch *gdbarch,
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return 0;
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}
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const target_desc *
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amd64_linux_read_description (uint64_t xcr0_features_bit, bool is_x32)
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{
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static target_desc *amd64_linux_tdescs \
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[2/*AVX*/][2/*MPX*/][2/*AVX512*/][2/*PKRU*/] = {};
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static target_desc *x32_linux_tdescs \
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[2/*AVX*/][2/*AVX512*/][2/*PKRU*/] = {};
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target_desc **tdesc;
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if (is_x32)
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{
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tdesc = &x32_linux_tdescs[(xcr0_features_bit & X86_XSTATE_AVX) ? 1 : 0 ]
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[(xcr0_features_bit & X86_XSTATE_AVX512) ? 1 : 0]
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[(xcr0_features_bit & X86_XSTATE_PKRU) ? 1 : 0];
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}
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else
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{
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tdesc = &amd64_linux_tdescs[(xcr0_features_bit & X86_XSTATE_AVX) ? 1 : 0]
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[(xcr0_features_bit & X86_XSTATE_MPX) ? 1 : 0]
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[(xcr0_features_bit & X86_XSTATE_AVX512) ? 1 : 0]
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[(xcr0_features_bit & X86_XSTATE_PKRU) ? 1 : 0];
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}
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if (*tdesc == NULL)
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*tdesc = amd64_create_target_description (xcr0_features_bit, is_x32,
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true, true);
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return *tdesc;
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}
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/* Get Linux/x86 target description from core dump. */
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static const struct target_desc *
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@ -681,12 +681,29 @@ i386_linux_core_read_x86_xsave_layout (struct gdbarch *gdbarch,
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layout) != 0;
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}
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/* See nat/x86-linux-tdesc.h. */
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/* See i386-linux-tdep.h. */
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void
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x86_linux_post_init_tdesc (target_desc *tdesc, bool is_64bit)
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const struct target_desc *
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i386_linux_read_description (uint64_t xcr0)
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{
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/* Nothing. */
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if (xcr0 == 0)
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return NULL;
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static struct target_desc *i386_linux_tdescs \
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[2/*X87*/][2/*SSE*/][2/*AVX*/][2/*MPX*/][2/*AVX512*/][2/*PKRU*/] = {};
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struct target_desc **tdesc;
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tdesc = &i386_linux_tdescs[(xcr0 & X86_XSTATE_X87) ? 1 : 0]
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[(xcr0 & X86_XSTATE_SSE) ? 1 : 0]
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[(xcr0 & X86_XSTATE_AVX) ? 1 : 0]
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[(xcr0 & X86_XSTATE_MPX) ? 1 : 0]
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[(xcr0 & X86_XSTATE_AVX512) ? 1 : 0]
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[(xcr0 & X86_XSTATE_PKRU) ? 1 : 0];
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if (*tdesc == NULL)
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*tdesc = i386_create_target_description (xcr0, true, false);
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return *tdesc;
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}
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/* Get Linux/x86 target description from core dump. */
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@ -699,10 +716,7 @@ i386_linux_core_read_description (struct gdbarch *gdbarch,
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/* Linux/i386. */
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x86_xsave_layout layout;
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uint64_t xcr0 = i386_linux_core_read_xsave_info (abfd, layout);
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const struct target_desc *tdesc;
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if (xcr0 != 0)
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tdesc = i386_linux_read_description (xcr0);
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const struct target_desc *tdesc = i386_linux_read_description (xcr0);
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if (tdesc != NULL)
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return tdesc;
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@ -38,8 +38,6 @@
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#include <sys/user.h>
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#include <sys/user.h>
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#ifndef IN_PROCESS_AGENT
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/* See nat/x86-linux-tdesc.h. */
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const target_desc *
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@ -124,288 +122,3 @@ x86_linux_tdesc_for_tid (int tid, enum tribool *have_ptrace_getregset,
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gdb_assert_not_reached ("failed to return tdesc");
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}
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#endif /* !IN_PROCESS_AGENT */
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/* A structure used to describe a single cpu feature that might, or might
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not, be checked for when creating a target description for one of i386,
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amd64, or x32. */
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struct x86_tdesc_feature {
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/* The cpu feature mask. This is a mask against an xcr0 value. */
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uint64_t feature;
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/* Is this feature checked when creating an i386 target description. */
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bool is_i386;
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/* Is this feature checked when creating an amd64 target description. */
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bool is_amd64;
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/* Is this feature checked when creating an x32 target description. */
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bool is_x32;
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};
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/* A constant table that describes all of the cpu features that are
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checked when building a target description for i386, amd64, or x32. */
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static constexpr x86_tdesc_feature x86_linux_all_tdesc_features[] = {
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/* Feature, i386, amd64, x32. */
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{ X86_XSTATE_PKRU, true, true, true },
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{ X86_XSTATE_AVX512, true, true, true },
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{ X86_XSTATE_AVX, true, true, true },
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{ X86_XSTATE_MPX, true, true, false },
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{ X86_XSTATE_SSE, true, false, false },
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{ X86_XSTATE_X87, true, false, false }
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};
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/* Return a compile time constant which is a mask of all the cpu features
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that are checked for when building an i386 target description. */
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static constexpr uint64_t
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x86_linux_i386_tdesc_feature_mask ()
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{
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uint64_t mask = 0;
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for (const auto &entry : x86_linux_all_tdesc_features)
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if (entry.is_i386)
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mask |= entry.feature;
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return mask;
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}
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/* Return a compile time constant which is a mask of all the cpu features
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that are checked for when building an amd64 target description. */
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static constexpr uint64_t
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x86_linux_amd64_tdesc_feature_mask ()
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{
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uint64_t mask = 0;
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for (const auto &entry : x86_linux_all_tdesc_features)
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if (entry.is_amd64)
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mask |= entry.feature;
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return mask;
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}
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/* Return a compile time constant which is a mask of all the cpu features
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that are checked for when building an x32 target description. */
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static constexpr uint64_t
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x86_linux_x32_tdesc_feature_mask ()
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{
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uint64_t mask = 0;
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for (const auto &entry : x86_linux_all_tdesc_features)
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if (entry.is_x32)
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mask |= entry.feature;
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return mask;
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}
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/* Return a compile time constant which is a count of the number of cpu
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features that are checked for when building an i386 target description. */
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static constexpr int
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x86_linux_i386_tdesc_count ()
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{
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uint64_t count = 0;
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for (const auto &entry : x86_linux_all_tdesc_features)
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if (entry.is_i386)
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++count;
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gdb_assert (count > 0);
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return (1 << count);
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}
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/* Return a compile time constant which is a count of the number of cpu
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features that are checked for when building an amd64 target description. */
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static constexpr int
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x86_linux_amd64_tdesc_count ()
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{
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uint64_t count = 0;
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for (const auto &entry : x86_linux_all_tdesc_features)
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if (entry.is_amd64)
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++count;
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gdb_assert (count > 0);
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return (1 << count);
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}
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/* Return a compile time constant which is a count of the number of cpu
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features that are checked for when building an x32 target description. */
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static constexpr int
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x86_linux_x32_tdesc_count ()
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{
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uint64_t count = 0;
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for (const auto &entry : x86_linux_all_tdesc_features)
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if (entry.is_x32)
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++count;
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gdb_assert (count > 0);
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return (1 << count);
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}
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#ifdef IN_PROCESS_AGENT
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/* See linux-x86-tdesc.h. */
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int
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x86_linux_amd64_ipa_tdesc_count ()
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{
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return x86_linux_amd64_tdesc_count ();
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}
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/* See linux-x86-tdesc.h. */
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int
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x86_linux_x32_ipa_tdesc_count ()
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{
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return x86_linux_x32_tdesc_count ();
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}
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/* See linux-x86-tdesc.h. */
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int
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x86_linux_i386_ipa_tdesc_count ()
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{
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return x86_linux_i386_tdesc_count ();
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}
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#endif /* IN_PROCESS_AGENT */
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/* Convert an xcr0 value into an integer. The integer will be passed to
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the in-process-agent where it will then be passed to
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x86_linux_tdesc_idx_to_xcr0 to get back the xcr0 value. */
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int
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x86_linux_xcr0_to_tdesc_idx (uint64_t xcr0)
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{
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/* The following table shows which features are checked for when creating
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the target descriptions (see nat/x86-linux-tdesc.c), the feature order
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represents the bit order within the generated index number.
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i386 | x87 sse mpx avx avx512 pkru
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amd64 | mpx avx avx512 pkru
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i32 | avx avx512 pkru
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The features are ordered so that for each mode (i386, amd64, i32) the
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generated index will form a continuous range. */
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int idx = 0;
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for (int i = 0; i < ARRAY_SIZE (x86_linux_all_tdesc_features); ++i)
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{
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if ((xcr0 & x86_linux_all_tdesc_features[i].feature) != 0)
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idx |= (1 << i);
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}
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return idx;
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}
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#ifdef IN_PROCESS_AGENT
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/* Convert an index number (as returned from x86_linux_xcr0_to_tdesc_idx)
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into an xcr0 value which can then be used to create a target
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description. */
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uint64_t
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x86_linux_tdesc_idx_to_xcr0 (int idx)
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{
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uint64_t xcr0 = 0;
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for (int i = 0; i < ARRAY_SIZE (x86_linux_all_tdesc_features); ++i)
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{
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if ((idx & (1 << i)) != 0)
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xcr0 |= x86_linux_all_tdesc_features[i].feature;
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}
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return xcr0;
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}
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#endif /* IN_PROCESS_AGENT */
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#if defined __i386__ || !defined IN_PROCESS_AGENT
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/* A cache of all possible i386 target descriptions. */
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static struct target_desc *i386_tdescs[x86_linux_i386_tdesc_count ()] = { };
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/* See nat/x86-linux-tdesc.h. */
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const struct target_desc *
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i386_linux_read_description (uint64_t xcr0)
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{
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xcr0 &= x86_linux_i386_tdesc_feature_mask ();
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int idx = x86_linux_xcr0_to_tdesc_idx (xcr0);
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gdb_assert (idx >= 0 && idx < x86_linux_i386_tdesc_count ());
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target_desc **tdesc = &i386_tdescs[idx];
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if (*tdesc == nullptr)
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{
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*tdesc = i386_create_target_description (xcr0, true, false);
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x86_linux_post_init_tdesc (*tdesc, false);
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}
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return *tdesc;
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}
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#endif
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#ifdef __x86_64__
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/* A cache of all possible amd64 target descriptions. */
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static target_desc *amd64_tdescs[x86_linux_amd64_tdesc_count ()] = { };
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/* A cache of all possible x32 target descriptions. */
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static target_desc *x32_tdescs[x86_linux_x32_tdesc_count ()] = { };
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/* See nat/x86-linux-tdesc.h. */
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const struct target_desc *
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amd64_linux_read_description (uint64_t xcr0, bool is_x32)
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{
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if (is_x32)
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xcr0 &= x86_linux_x32_tdesc_feature_mask ();
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else
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xcr0 &= x86_linux_amd64_tdesc_feature_mask ();
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int idx = x86_linux_xcr0_to_tdesc_idx (xcr0);
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if (is_x32)
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gdb_assert (idx >= 0 && idx < x86_linux_x32_tdesc_count ());
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else
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gdb_assert (idx >= 0 && idx < x86_linux_amd64_tdesc_count ());
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target_desc **tdesc = nullptr;
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if (is_x32)
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tdesc = &x32_tdescs[idx];
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else
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tdesc = &amd64_tdescs[idx];
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if (*tdesc == nullptr)
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{
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*tdesc = amd64_create_target_description (xcr0, is_x32, true, true);
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x86_linux_post_init_tdesc (*tdesc, true);
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}
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return *tdesc;
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}
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#endif
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@ -24,8 +24,6 @@
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struct target_desc;
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#ifndef IN_PROCESS_AGENT
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/* Return the target description for Linux thread TID.
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When *HAVE_PTRACE_GETREGSET is TRIBOOL_UNKNOWN then the current value of
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@ -59,57 +57,19 @@ x86_linux_tdesc_for_tid (int tid, enum tribool *have_ptrace_getregset,
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gdb::function_view<void (uint64_t)> xcr0_init_cb,
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const char *error_msg, uint64_t *xcr0_storage);
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#endif /* !IN_PROCESS_AGENT */
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#ifdef __x86_64__
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/* Return the AMD64 target descriptions corresponding to XCR0 and IS_X32. */
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/* Return the right amd64-linux target descriptions according to
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XCR0_FEATURES_BIT and IS_X32. This is implemented separately in both
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GDB and gdbserver. */
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extern const target_desc *amd64_linux_read_description (uint64_t xcr0,
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bool is_x32);
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extern const target_desc *amd64_linux_read_description
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(uint64_t xcr0_features_bit, bool is_x32);
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#endif /* __x86_64__ */
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/* Return the i386 target description corresponding to XCR0. */
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#endif
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/* Return the target description according to XCR0. This is implemented
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separately in both GDB and gdbserver. */
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extern const struct target_desc *i386_linux_read_description (uint64_t xcr0);
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/* This function is called from amd64_linux_read_description and
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i386_linux_read_description after a new target description has been
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created, TDESC is the new target description, IS_64BIT will be true
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when called from amd64_linux_read_description, otherwise IS_64BIT will
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be false. If the *_linux_read_description functions found a cached
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target description then this function will not be called.
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Both GDB and gdbserver have their own implementations of this
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function. */
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extern void x86_linux_post_init_tdesc (target_desc *tdesc, bool is_64bit);
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/* Convert an xcr0 value into an integer. The integer will be passed to
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the in-process-agent where it will then be passed to
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x86_linux_tdesc_idx_to_xcr0 to get back the xcr0 value. */
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extern int x86_linux_xcr0_to_tdesc_idx (uint64_t xcr0);
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#ifdef IN_PROCESS_AGENT
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/* Convert an index number (as returned from x86_linux_xcr0_to_tdesc_idx)
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into an xcr0 value which can then be used to create a target
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description. */
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extern uint64_t x86_linux_tdesc_idx_to_xcr0 (int idx);
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/* Within the in-process-agent we need to pre-initialise all of the target
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descriptions, to do this we need to know how many target descriptions
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there are for each different target type. These functions return the
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target description count for the relevant target. */
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extern int x86_linux_amd64_ipa_tdesc_count ();
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extern int x86_linux_x32_ipa_tdesc_count ();
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extern int x86_linux_i386_ipa_tdesc_count ();
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#endif /* IN_PROCESS_AGENT */
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#endif /* NAT_X86_LINUX_TDESC_H */
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@ -519,10 +519,6 @@ gdbsupport/%-ipa.o: ../gdbsupport/%.cc
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$(IPAGENT_COMPILE) $<
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$(POSTCOMPILE)
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nat/%-ipa.o: ../gdb/nat/%.c
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$(IPAGENT_COMPILE) $<
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$(POSTCOMPILE)
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%-ipa.o: ../gdb/%.c
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$(IPAGENT_COMPILE) -x c++ $<
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$(POSTCOMPILE)
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@ -116,7 +116,6 @@ case "${gdbserver_host}" in
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srv_linux_btrace=yes
|
||||
ipa_obj="linux-i386-ipa.o linux-x86-tdesc-ipa.o"
|
||||
ipa_obj="${ipa_obj} arch/i386-ipa.o"
|
||||
ipa_obj="${ipa_obj} nat/x86-linux-tdesc-ipa.o"
|
||||
;;
|
||||
i[34567]86-*-mingw*) srv_regobj=""
|
||||
srv_tgtobj="x86-low.o nat/x86-dregs.o win32-low.o"
|
||||
@ -381,7 +380,6 @@ case "${gdbserver_host}" in
|
||||
srv_linux_btrace=yes
|
||||
ipa_obj="linux-amd64-ipa.o linux-x86-tdesc-ipa.o"
|
||||
ipa_obj="${ipa_obj} arch/amd64-ipa.o"
|
||||
ipa_obj="${ipa_obj} nat/x86-linux-tdesc-ipa.o"
|
||||
;;
|
||||
x86_64-*-mingw*) srv_regobj=""
|
||||
srv_tgtobj="x86-low.o nat/x86-dregs.o"
|
||||
|
||||
@ -21,6 +21,7 @@
|
||||
#include "server.h"
|
||||
#include <sys/mman.h>
|
||||
#include "tracepoint.h"
|
||||
#include "linux-x86-tdesc.h"
|
||||
#include "gdbsupport/x86-xstate.h"
|
||||
#include "nat/x86-linux-tdesc.h"
|
||||
|
||||
|
||||
@ -21,6 +21,7 @@
|
||||
#include "server.h"
|
||||
#include <sys/mman.h>
|
||||
#include "tracepoint.h"
|
||||
#include "linux-x86-tdesc.h"
|
||||
#include "gdbsupport/x86-xstate.h"
|
||||
#include "nat/x86-linux-tdesc.h"
|
||||
|
||||
|
||||
@ -47,6 +47,7 @@
|
||||
#include "nat/linux-nat.h"
|
||||
#include "nat/x86-linux.h"
|
||||
#include "nat/x86-linux-dregs.h"
|
||||
#include "linux-x86-tdesc.h"
|
||||
#include "nat/x86-linux-tdesc.h"
|
||||
|
||||
#ifdef __x86_64__
|
||||
|
||||
@ -19,19 +19,292 @@
|
||||
|
||||
#include "server.h"
|
||||
#include "tdesc.h"
|
||||
#include "linux-x86-tdesc.h"
|
||||
#include "arch/i386.h"
|
||||
#include "gdbsupport/x86-xstate.h"
|
||||
#ifdef __x86_64__
|
||||
#include "arch/amd64.h"
|
||||
#endif
|
||||
#include "x86-tdesc.h"
|
||||
#include "nat/x86-linux-tdesc.h"
|
||||
|
||||
/* See nat/x86-linux-tdesc.h. */
|
||||
/* A structure used to describe a single cpu feature that might, or might
|
||||
not, be checked for when creating a target description for one of i386,
|
||||
amd64, or x32. */
|
||||
|
||||
void
|
||||
x86_linux_post_init_tdesc (target_desc *tdesc, bool is_64bit)
|
||||
struct x86_tdesc_feature {
|
||||
/* The cpu feature mask. This is a mask against an xcr0 value. */
|
||||
uint64_t feature;
|
||||
|
||||
/* Is this feature checked when creating an i386 target description. */
|
||||
bool is_i386;
|
||||
|
||||
/* Is this feature checked when creating an amd64 target description. */
|
||||
bool is_amd64;
|
||||
|
||||
/* Is this feature checked when creating an x32 target description. */
|
||||
bool is_x32;
|
||||
};
|
||||
|
||||
/* A constant table that describes all of the cpu features that are
|
||||
checked when building a target description for i386, amd64, or x32. */
|
||||
|
||||
static constexpr x86_tdesc_feature x86_linux_all_tdesc_features[] = {
|
||||
/* Feature, i386, amd64, x32. */
|
||||
{ X86_XSTATE_PKRU, true, true, true },
|
||||
{ X86_XSTATE_AVX512, true, true, true },
|
||||
{ X86_XSTATE_AVX, true, true, true },
|
||||
{ X86_XSTATE_MPX, true, true, false },
|
||||
{ X86_XSTATE_SSE, true, false, false },
|
||||
{ X86_XSTATE_X87, true, false, false }
|
||||
};
|
||||
|
||||
/* Return a compile time constant which is a mask of all the cpu features
|
||||
that are checked for when building an i386 target description. */
|
||||
|
||||
static constexpr uint64_t
|
||||
x86_linux_i386_tdesc_feature_mask ()
|
||||
{
|
||||
#ifdef __x86_64__
|
||||
if (is_64bit)
|
||||
init_target_desc (tdesc, amd64_expedite_regs);
|
||||
else
|
||||
#endif
|
||||
init_target_desc (tdesc, i386_expedite_regs);
|
||||
uint64_t mask = 0;
|
||||
|
||||
for (const auto &entry : x86_linux_all_tdesc_features)
|
||||
if (entry.is_i386)
|
||||
mask |= entry.feature;
|
||||
|
||||
return mask;
|
||||
}
|
||||
|
||||
/* Return a compile time constant which is a mask of all the cpu features
|
||||
that are checked for when building an amd64 target description. */
|
||||
|
||||
static constexpr uint64_t
|
||||
x86_linux_amd64_tdesc_feature_mask ()
|
||||
{
|
||||
uint64_t mask = 0;
|
||||
|
||||
for (const auto &entry : x86_linux_all_tdesc_features)
|
||||
if (entry.is_amd64)
|
||||
mask |= entry.feature;
|
||||
|
||||
return mask;
|
||||
}
|
||||
|
||||
/* Return a compile time constant which is a mask of all the cpu features
|
||||
that are checked for when building an x32 target description. */
|
||||
|
||||
static constexpr uint64_t
|
||||
x86_linux_x32_tdesc_feature_mask ()
|
||||
{
|
||||
uint64_t mask = 0;
|
||||
|
||||
for (const auto &entry : x86_linux_all_tdesc_features)
|
||||
if (entry.is_x32)
|
||||
mask |= entry.feature;
|
||||
|
||||
return mask;
|
||||
}
|
||||
|
||||
/* Return a compile time constant which is a count of the number of cpu
|
||||
features that are checked for when building an i386 target description. */
|
||||
|
||||
static constexpr int
|
||||
x86_linux_i386_tdesc_count ()
|
||||
{
|
||||
uint64_t count = 0;
|
||||
|
||||
for (const auto &entry : x86_linux_all_tdesc_features)
|
||||
if (entry.is_i386)
|
||||
++count;
|
||||
|
||||
gdb_assert (count > 0);
|
||||
|
||||
return (1 << count);
|
||||
}
|
||||
|
||||
/* Return a compile time constant which is a count of the number of cpu
|
||||
features that are checked for when building an amd64 target description. */
|
||||
|
||||
static constexpr int
|
||||
x86_linux_amd64_tdesc_count ()
|
||||
{
|
||||
uint64_t count = 0;
|
||||
|
||||
for (const auto &entry : x86_linux_all_tdesc_features)
|
||||
if (entry.is_amd64)
|
||||
++count;
|
||||
|
||||
gdb_assert (count > 0);
|
||||
|
||||
return (1 << count);
|
||||
}
|
||||
|
||||
/* Return a compile time constant which is a count of the number of cpu
|
||||
features that are checked for when building an x32 target description. */
|
||||
|
||||
static constexpr int
|
||||
x86_linux_x32_tdesc_count ()
|
||||
{
|
||||
uint64_t count = 0;
|
||||
|
||||
for (const auto &entry : x86_linux_all_tdesc_features)
|
||||
if (entry.is_x32)
|
||||
++count;
|
||||
|
||||
gdb_assert (count > 0);
|
||||
|
||||
return (1 << count);
|
||||
}
|
||||
|
||||
#ifdef IN_PROCESS_AGENT
|
||||
|
||||
/* See linux-x86-tdesc.h. */
|
||||
|
||||
int
|
||||
x86_linux_amd64_ipa_tdesc_count ()
|
||||
{
|
||||
return x86_linux_amd64_tdesc_count ();
|
||||
}
|
||||
|
||||
/* See linux-x86-tdesc.h. */
|
||||
|
||||
int
|
||||
x86_linux_x32_ipa_tdesc_count ()
|
||||
{
|
||||
return x86_linux_x32_tdesc_count ();
|
||||
}
|
||||
|
||||
/* See linux-x86-tdesc.h. */
|
||||
|
||||
int
|
||||
x86_linux_i386_ipa_tdesc_count ()
|
||||
{
|
||||
return x86_linux_i386_tdesc_count ();
|
||||
}
|
||||
|
||||
#endif /* IN_PROCESS_AGENT */
|
||||
|
||||
/* Convert an xcr0 value into an integer. The integer will be passed to
|
||||
the in-process-agent where it will then be passed to
|
||||
x86_linux_tdesc_idx_to_xcr0 to get back the xcr0 value. */
|
||||
|
||||
int
|
||||
x86_linux_xcr0_to_tdesc_idx (uint64_t xcr0)
|
||||
{
|
||||
/* The following table shows which features are checked for when creating
|
||||
the target descriptions (see nat/x86-linux-tdesc.c), the feature order
|
||||
represents the bit order within the generated index number.
|
||||
|
||||
i386 | x87 sse mpx avx avx512 pkru
|
||||
amd64 | mpx avx avx512 pkru
|
||||
i32 | avx avx512 pkru
|
||||
|
||||
The features are ordered so that for each mode (i386, amd64, i32) the
|
||||
generated index will form a continuous range. */
|
||||
|
||||
int idx = 0;
|
||||
|
||||
for (int i = 0; i < ARRAY_SIZE (x86_linux_all_tdesc_features); ++i)
|
||||
{
|
||||
if ((xcr0 & x86_linux_all_tdesc_features[i].feature) != 0)
|
||||
idx |= (1 << i);
|
||||
}
|
||||
|
||||
return idx;
|
||||
}
|
||||
|
||||
|
||||
#ifdef IN_PROCESS_AGENT
|
||||
|
||||
/* Convert an index number (as returned from x86_linux_xcr0_to_tdesc_idx)
|
||||
into an xcr0 value which can then be used to create a target
|
||||
description. */
|
||||
|
||||
uint64_t
|
||||
x86_linux_tdesc_idx_to_xcr0 (int idx)
|
||||
{
|
||||
uint64_t xcr0 = 0;
|
||||
|
||||
for (int i = 0; i < ARRAY_SIZE (x86_linux_all_tdesc_features); ++i)
|
||||
{
|
||||
if ((idx & (1 << i)) != 0)
|
||||
xcr0 |= x86_linux_all_tdesc_features[i].feature;
|
||||
}
|
||||
|
||||
return xcr0;
|
||||
}
|
||||
|
||||
#endif /* IN_PROCESS_AGENT */
|
||||
|
||||
#if defined __i386__ || !defined IN_PROCESS_AGENT
|
||||
|
||||
/* A cache of all possible i386 target descriptions. */
|
||||
|
||||
static struct target_desc *i386_tdescs[x86_linux_i386_tdesc_count ()] = { };
|
||||
|
||||
/* See nat/x86-linux-tdesc.h. */
|
||||
|
||||
const struct target_desc *
|
||||
i386_linux_read_description (uint64_t xcr0)
|
||||
{
|
||||
xcr0 &= x86_linux_i386_tdesc_feature_mask ();
|
||||
int idx = x86_linux_xcr0_to_tdesc_idx (xcr0);
|
||||
|
||||
gdb_assert (idx >= 0 && idx < x86_linux_i386_tdesc_count ());
|
||||
|
||||
target_desc **tdesc = &i386_tdescs[idx];
|
||||
|
||||
if (*tdesc == nullptr)
|
||||
{
|
||||
*tdesc = i386_create_target_description (xcr0, true, false);
|
||||
|
||||
init_target_desc (*tdesc, i386_expedite_regs);
|
||||
}
|
||||
|
||||
return *tdesc;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef __x86_64__
|
||||
|
||||
/* A cache of all possible amd64 target descriptions. */
|
||||
|
||||
static target_desc *amd64_tdescs[x86_linux_amd64_tdesc_count ()] = { };
|
||||
|
||||
/* A cache of all possible x32 target descriptions. */
|
||||
|
||||
static target_desc *x32_tdescs[x86_linux_x32_tdesc_count ()] = { };
|
||||
|
||||
/* See nat/x86-linux-tdesc.h. */
|
||||
|
||||
const struct target_desc *
|
||||
amd64_linux_read_description (uint64_t xcr0, bool is_x32)
|
||||
{
|
||||
if (is_x32)
|
||||
xcr0 &= x86_linux_x32_tdesc_feature_mask ();
|
||||
else
|
||||
xcr0 &= x86_linux_amd64_tdesc_feature_mask ();
|
||||
|
||||
int idx = x86_linux_xcr0_to_tdesc_idx (xcr0);
|
||||
|
||||
if (is_x32)
|
||||
gdb_assert (idx >= 0 && idx < x86_linux_x32_tdesc_count ());
|
||||
else
|
||||
gdb_assert (idx >= 0 && idx < x86_linux_amd64_tdesc_count ());
|
||||
|
||||
target_desc **tdesc = nullptr;
|
||||
|
||||
if (is_x32)
|
||||
tdesc = &x32_tdescs[idx];
|
||||
else
|
||||
tdesc = &amd64_tdescs[idx];
|
||||
|
||||
if (*tdesc == nullptr)
|
||||
{
|
||||
*tdesc = amd64_create_target_description (xcr0, is_x32, true, true);
|
||||
|
||||
init_target_desc (*tdesc, amd64_expedite_regs);
|
||||
}
|
||||
return *tdesc;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
50
gdbserver/linux-x86-tdesc.h
Normal file
50
gdbserver/linux-x86-tdesc.h
Normal file
@ -0,0 +1,50 @@
|
||||
/* Low level support for x86 (i386 and x86-64), shared between gdbserver
|
||||
and IPA.
|
||||
|
||||
Copyright (C) 2016-2024 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 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
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, see <http://www.gnu.org/licenses/>. */
|
||||
|
||||
#ifndef GDBSERVER_LINUX_X86_TDESC_H
|
||||
#define GDBSERVER_LINUX_X86_TDESC_H
|
||||
|
||||
/* Convert an xcr0 value into an integer. The integer will be passed to
|
||||
the in-process-agent where it will then be passed to
|
||||
x86_linux_tdesc_idx_to_xcr0 to get back the xcr0 value. */
|
||||
|
||||
extern int x86_linux_xcr0_to_tdesc_idx (uint64_t xcr0);
|
||||
|
||||
#ifdef IN_PROCESS_AGENT
|
||||
|
||||
/* Convert an index number (as returned from x86_linux_xcr0_to_tdesc_idx)
|
||||
into an xcr0 value which can then be used to create a target
|
||||
description. */
|
||||
|
||||
extern uint64_t x86_linux_tdesc_idx_to_xcr0 (int idx);
|
||||
|
||||
/* Within the in-process-agent we need to pre-initialise all of the target
|
||||
descriptions, to do this we need to know how many target descriptions
|
||||
there are for each different target type. These functions return the
|
||||
target description count for the relevant target. */
|
||||
|
||||
extern int x86_linux_amd64_ipa_tdesc_count ();
|
||||
extern int x86_linux_x32_ipa_tdesc_count ();
|
||||
extern int x86_linux_i386_ipa_tdesc_count ();
|
||||
|
||||
|
||||
#endif /* IN_PROCESS_AGENT */
|
||||
|
||||
#endif /* GDBSERVER_LINUX_X86_TDESC_H */
|
||||
Loading…
Reference in New Issue
Block a user