54f65f0398
Add a dependency on the GLIBC_2.35 glibc symbol set to libgcc, which contains the definition of _dl_find_object. Resolves: RHEL-105072
49 lines
1.5 KiB
Diff
49 lines
1.5 KiB
Diff
commit acdb24166d13d87c374e578d2ad5d58249171930
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Mon Oct 17 11:09:17 2022 +0200
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libgcc: Move cfa_how into potential padding in struct frame_state_reg_info
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On many architectures, there is a padding gap after the how array
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member, and cfa_how can be moved there. This reduces the size of the
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struct and the amount of memory that uw_frame_state_for has to clear.
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There is no measurable performance benefit from this on x86-64 (even
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though the memset goes from 120 to 112 bytes), but it seems to be a
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good idea to do anyway.
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libgcc/
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* unwind-dw2.h (struct frame_state_reg_info): Move cfa_how member
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and reduce its size.
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diff --git a/libgcc/unwind-dw2.h b/libgcc/unwind-dw2.h
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index 22241b1f0d14cffc..437c785efa4f297d 100644
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--- a/libgcc/unwind-dw2.h
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+++ b/libgcc/unwind-dw2.h
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@@ -50,6 +50,12 @@ typedef struct
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} reg[__LIBGCC_DWARF_FRAME_REGISTERS__+1];
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unsigned char how[__LIBGCC_DWARF_FRAME_REGISTERS__+1];
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+ enum {
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+ CFA_UNSET,
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+ CFA_REG_OFFSET,
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+ CFA_EXP
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+ } cfa_how : 8;
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+
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/* Used to implement DW_CFA_remember_state. */
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struct frame_state_reg_info *prev;
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@@ -58,11 +64,6 @@ typedef struct
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_Unwind_Sword cfa_offset;
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_Unwind_Word cfa_reg;
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const unsigned char *cfa_exp;
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- enum {
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- CFA_UNSET,
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- CFA_REG_OFFSET,
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- CFA_EXP
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- } cfa_how;
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} regs;
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/* The PC described by the current frame state. */
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