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[hurd, commited 2/2] hurd: document that gcc&gdb look at the trampoline
From: |
Samuel Thibault |
Subject: |
[hurd, commited 2/2] hurd: document that gcc&gdb look at the trampoline code |
Date: |
Wed, 10 Jun 2020 23:36:08 +0200 |
* sysdeps/mach/hurd/i386/trampoline.c (rpc_wait_trampoline): Document
which gcc and gdb files look at the code of the trampoline.
---
sysdeps/mach/hurd/i386/trampoline.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/sysdeps/mach/hurd/i386/trampoline.c
b/sysdeps/mach/hurd/i386/trampoline.c
index e7eb316fce..8c7976919c 100644
--- a/sysdeps/mach/hurd/i386/trampoline.c
+++ b/sysdeps/mach/hurd/i386/trampoline.c
@@ -227,7 +227,11 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss,
__sighandler_t handler,
}
/* The trampoline code follows. This used to be located inside
- _hurd_setup_sighandler, but was optimized away by gcc 2.95. */
+ _hurd_setup_sighandler, but was optimized away by gcc 2.95.
+
+ If you modify this, update
+ - in gcc: libgcc/config/i386/gnu-unwind.h x86_gnu_fallback_frame_state,
+ - in gdb: gdb/i386-gnu-tdep.c gnu_sigtramp_code. */
asm ("rpc_wait_trampoline:\n");
/* This is the entry point when we have an RPC reply message to receive
--
2.26.2