diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/mach/hurd/x86/trampoline.c | 6 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/x86_64/bits/sigcontext.h | 8 |
2 files changed, 14 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/x86/trampoline.c b/sysdeps/mach/hurd/x86/trampoline.c index 1f92064..6318c95 100644 --- a/sysdeps/mach/hurd/x86/trampoline.c +++ b/sysdeps/mach/hurd/x86/trampoline.c @@ -242,11 +242,17 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, const struct sigaction *action /* struct sigcontext is laid out so that starting at sc_gs mimics a struct i386_thread_state. */ + _Static_assert (offsetof (struct sigcontext, sc_i386_thread_state) + % __alignof__ (struct i386_thread_state) == 0, + "sc_i386_thread_state layout mismatch"); memcpy (&scp->sc_i386_thread_state, &state->basic, sizeof (state->basic)); /* struct sigcontext is laid out so that starting at sc_fpkind mimics a struct i386_float_state. */ + _Static_assert (offsetof (struct sigcontext, sc_i386_float_state) + % __alignof__ (struct i386_float_state) == 0, + "sc_i386_float_state layout mismatch"); ok = machine_get_state (ss->thread, state, i386_FLOAT_STATE, &state->fpu, &scp->sc_i386_float_state, sizeof (state->fpu)); diff --git a/sysdeps/mach/hurd/x86_64/bits/sigcontext.h b/sysdeps/mach/hurd/x86_64/bits/sigcontext.h index 3a3b34b..6396054 100644 --- a/sysdeps/mach/hurd/x86_64/bits/sigcontext.h +++ b/sysdeps/mach/hurd/x86_64/bits/sigcontext.h @@ -46,6 +46,11 @@ struct sigcontext /* Error code associated with this signal (interpreted as `error_t'). */ int sc_error; + /* Make sure the below members are properly aligned, and not packed + together with sc_error -- otherwise the layout won't match that of + i386_thread_state. */ + int sc_pad1; + /* All following members are machine-dependent. The rest of this structure is written to be laid out identically to: { @@ -86,6 +91,9 @@ struct sigcontext long sc_ursp; /* This stack pointer is used. */ int sc_ss; /* Stack segment register. */ + /* Make sure the below has the same layout as i386_float_state. */ + int sc_pad2; + /* Following mimics struct i386_float_state. Structures and symbolic values can be found in <mach/i386/fp_reg.h>. */ #define sc_i386_float_state sc_fpkind |