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FreeBSD x86: Remove fallback for detecting signal trampolines by address.

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A few FreeBSD releases did not include the page holding the signal
code in core dumps.  As a workaround, a sysctl was used to fetch the
default location of the signal code instead.  The youngest affected
FreeBSD release is 10.1 released in November 2014 and EOLed in
December 2016.  The fallback only works for native processes and would
require a separate unwinder once the FreeBSD arches are converted to
use tramp_frame for signal frames.
This commit is contained in:
John Baldwin
2022-01-28 11:14:37 -08:00
parent bf84b776bd
commit 5046f3c8c0
6 changed files with 0 additions and 72 deletions
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6
gdb/amd64-fbsd-tdep.c
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@@ -117,10 +117,6 @@ static int amd64fbsd_r_reg_offset[] =
-1 /* %gs */
};
/* Location of the signal trampoline. */
CORE_ADDR amd64fbsd_sigtramp_start_addr;
CORE_ADDR amd64fbsd_sigtramp_end_addr;
/* From <machine/signal.h>. */
int amd64fbsd_sc_reg_offset[] =
{
@@ -245,8 +241,6 @@ amd64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
amd64_target_description (X86_XSTATE_SSE_MASK, true));
tdep->sigtramp_p = amd64fbsd_sigtramp_p;
tdep->sigtramp_start = amd64fbsd_sigtramp_start_addr;
tdep->sigtramp_end = amd64fbsd_sigtramp_end_addr;
tdep->sigcontext_addr = amd64fbsd_sigcontext_addr;
tdep->sc_reg_offset = amd64fbsd_sc_reg_offset;
tdep->sc_num_regs = ARRAY_SIZE (amd64fbsd_sc_reg_offset);