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winebuild: Make relay entry points hot-patchable. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2019-03-01 12:39:39 +01:00
parent 26bbbb7b73
commit 9d0ba368da
1 changed files with 19 additions and 5 deletions
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24
tools/winebuild/spec32.c
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@ -218,13 +218,14 @@ static void output_relay_debug( DLLSPEC *spec )
if (!needs_relay( odp )) continue;
output( "\t.align %d\n", get_alignment(4) );
output( ".L__wine_spec_relay_entry_point_%d:\n", i );
output_cfi( ".cfi_startproc" );
switch (target_cpu)
{
case CPU_x86:
output( "\t.align %d\n", get_alignment(4) );
output( "\t.long 0x90909090,0x90909090\n" );
output( ".L__wine_spec_relay_entry_point_%d:\n", i );
output_cfi( ".cfi_startproc" );
output( "\t.byte 0x8b,0xff,0x55,0x8b,0xec,0x5d\n" ); /* hotpatch prolog */
if (odp->flags & (FLAG_THISCALL | FLAG_FASTCALL)) /* add the register arguments */
{
output( "\tpopl %%eax\n" );
@ -251,6 +252,7 @@ static void output_relay_debug( DLLSPEC *spec )
output( "\tret $%u\n", get_args_size( odp ));
else
output( "\tret\n" );
output_cfi( ".cfi_endproc" );
break;
case CPU_ARM:
@ -263,6 +265,9 @@ static void output_relay_debug( DLLSPEC *spec )
has_float = is_float_arg( odp, j );
val = (odp->u.func.args_str_offset << 16) | (i - spec->base);
output( "\t.align %d\n", get_alignment(4) );
output( ".L__wine_spec_relay_entry_point_%d:\n", i );
output_cfi( ".cfi_startproc" );
output( "\tpush {r0-r3}\n" );
output( "\tmov r2, SP\n");
if (has_float) output( "\tvpush {s0-s15}\n" );
@ -279,10 +284,14 @@ static void output_relay_debug( DLLSPEC *spec )
output( "\tadd SP, #%u\n", 24 + (has_float ? 64 : 0) );
output( "\tbx IP\n");
output( "2:\t.long .L__wine_spec_relay_descr-1b\n" );
output_cfi( ".cfi_endproc" );
break;
}
case CPU_ARM64:
output( "\t.align %d\n", get_alignment(4) );
output( ".L__wine_spec_relay_entry_point_%d:\n", i );
output_cfi( ".cfi_startproc" );
switch (odp->u.func.nb_args)
{
default:
@ -314,9 +323,14 @@ static void output_relay_debug( DLLSPEC *spec )
if (odp->u.func.nb_args)
output( "\tadd SP, SP, #%u\n", 8 * ((min(odp->u.func.nb_args, 8) + 1) & ~1) );
output( "\tret\n");
output_cfi( ".cfi_endproc" );
break;
case CPU_x86_64:
output( "\t.align %d\n", get_alignment(4) );
output( "\t.long 0x90909090,0x90909090\n" );
output( ".L__wine_spec_relay_entry_point_%d:\n", i );
output_cfi( ".cfi_startproc" );
switch (odp->u.func.nb_args)
{
default: output( "\tmovq %%%s,32(%%rsp)\n", is_float_arg( odp, 3 ) ? "xmm3" : "r9" );
@ -333,12 +347,12 @@ static void output_relay_debug( DLLSPEC *spec )
output( "\tleaq .L__wine_spec_relay_descr(%%rip),%%rcx\n" );
output( "\tcallq *8(%%rcx)\n" );
output( "\tret\n" );
output_cfi( ".cfi_endproc" );
break;
default:
assert(0);
}
output_cfi( ".cfi_endproc" );
}
}