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Fixes #614: Implement a debug trap;

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This commit is contained in:
Benjamin Bouvier
2018-12-05 17:30:22 +01:00
committed by Dan Gohman
parent f065b39d65
commit 93696a80bb
4 changed files with 17 additions and 0 deletions
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5
lib/codegen/meta-python/isa/x86/encodings.py
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@@ -521,12 +521,17 @@ X86_32.enc(base.jump_table_base.i32, *r.jt_base(0x8d))
enc_x86_64(base.indirect_jump_table_br.i64, r.indirect_jmp, 0xff, rrr=4)
X86_32.enc(base.indirect_jump_table_br.i32, *r.indirect_jmp(0xff, rrr=4))
#
# Trap as ud2
#
X86_32.enc(base.trap, *r.trap(0x0f, 0x0b))
X86_64.enc(base.trap, *r.trap(0x0f, 0x0b))
# Debug trap as int3
X86_32.enc(base.debugtrap, r.debugtrap, 0)
X86_64.enc(base.debugtrap, r.debugtrap, 0)
# Using a standard EncRecipe, not the TailRecipe.
X86_32.enc(base.trapif, r.trapif, 0)
X86_64.enc(base.trapif, r.trapif, 0)

5
lib/codegen/meta-python/isa/x86/recipes.py
View File

@@ -295,6 +295,11 @@ def valid_scale(iform):
# copies and no-op conversions.
null = EncRecipe('null', Unary, base_size=0, ins=GPR, outs=0, emit='')
debugtrap = EncRecipe('debugtrap', NullAry, base_size=1, ins=(), outs=(),
emit='''
sink.put1(0xcc);
''')
# XX opcode, no ModR/M.
trap = TailRecipe(
'trap', Trap, base_size=0, ins=(), outs=(),