diff options
| author | Andreas Baumann <mail@andreasbaumann.cc> | 2020-04-11 20:39:28 +0200 |
|---|---|---|
| committer | Andreas Baumann <mail@andreasbaumann.cc> | 2020-04-11 20:39:28 +0200 |
| commit | 6fda06667e3991c39b721c13b040d7fb35e2b8b1 (patch) | |
| tree | 27f26aa82ca5a4b111a27dd22adc9d8e04860f67 /ecomp-c/asm-i386.c | |
| parent | ec256aa65d1c0ce880472e09730367d015862225 (diff) | |
| download | compilertests-6fda06667e3991c39b721c13b040d7fb35e2b8b1.tar.gz compilertests-6fda06667e3991c39b721c13b040d7fb35e2b8b1.tar.bz2 | |
added some comments on address rewriting
Diffstat (limited to 'ecomp-c/asm-i386.c')
| -rw-r--r-- | ecomp-c/asm-i386.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/ecomp-c/asm-i386.c b/ecomp-c/asm-i386.c index b2255a0..d905e55 100644 --- a/ecomp-c/asm-i386.c +++ b/ecomp-c/asm-i386.c @@ -1114,6 +1114,9 @@ static int patchup_addresses( OpcodeInfo *opcode_info ) while( opcode != NULL ) { + /* set new increment of an instruction, if we have to + * enhance the space occupied by the opcode + */ switch( opcode->opcode ) { case OPCODE_JMP: case OPCODE_JE: @@ -1137,6 +1140,14 @@ static int patchup_addresses( OpcodeInfo *opcode_info ) break; } + /* if an opcode has an increment, we must adapt + * - all addresses and labels coming after this instruction, + * - invalidate all addresses in opcodes below our current + * instruction, so they get recalculated + */ + + /* replace illegal address (forward references) with the + * correct address */ operand = opcode->operand; while( operand != NULL ) { if( operand->type == OPERAND_MEMORY_DIRECT || operand->type == OPERAND_MEMORY_INDIRECT ) { |