The return value of statement expressions might refer to local
symbols, so those can't be popped. The old error message always
was just a band-aid, and since disabling it for pointer types it
wasn't effective anyway. It also never considered that also the
vtop->sym member might have referred to such symbols (see the
testcase with the local static, that used to segfault).
For fixing this (can be seen better with valgrind and SYM_DEBUG)
simply leave local symbols of stmt exprs on the stack.
The include directive needs to be parsed as pp-tokens, not
as token (i.e. no conversion to TOK_STR or TOK_NUM). Also fix
parsing computed includes using quoted strings.
That, as well as "sym = expr", if expr contains symbols.
Slightly tricky because a definition from .set is overridable,
whereas proper definitions aren't.
This doesn't yet allow using this for override tricks from C
and global asm blocks because the symbol tables from C and asm
are separate.
But like GCC do warn about changes in signedness. The latter
leads to some changes in gen_assign_cast to not also warn about
unsigned* = int*
(where GCC warns, but only with extra warnings).
This requires correctly handling the REX prefix.
As bonus we now also support the four 8bit registers
spl,bpl,sil,dil, which are decoded as ah,ch,dh,bh in non-long-mode
(and require a REX prefix as well).
For
union U { struct {int a,b}; int c; };
union U u = {{ 1, 2, }};
The unnamed first member of union U needs to actually exist in the
structure so initializer parsing isn't confused about the double braces.
That means also the a and b members must be part of _that_, not of
union U directly. Which in turn means we need to do a bit more work
for field lookup.
See the testcase extension for more things that need to work.
Remove dead code and variables. Properly check for unions when
skipping fields in initializers. Make tests2/*.expect depend
on the .c files so they are automatically rebuilt when the latter
change.
E.g. "struct { struct S s; int a;} = { others, 42 };"
if 'others' is also a 'struct S'. Also when the value is a
compound literal. See added testcases.
This snippet is valid:
void foo(void);
... foo + 42 ...
the function designator is converted to pointer to function
implicitely. gen_op didn't do that and bailed out.
This must compile:
typedef int arrtype1[];
arrtype1 sinit19 = {1};
arrtype1 sinit20 = {2,3};
and generate two arrays of one resp. two elements. Before the fix
the determined size of the first array was encoded in the type
directly, so sinit20 couldn't be parsed anymore (because arrtype1
was thought to be only one element long).
lar can accept multiple sizes as well (wlx), like lsl. When using
autosize it's important to look at the destination operand first;
when it's a register that one determines the size, not the input
operand.
Given this code:
struct __attribute__((...)) Name {...};
TCC was eating "Name", hence generating an anonymous struct.
It also didn't apply any packed attributes to the parsed
members. Both fixed. The testcase also contains a case
that isn't yet handled by TCC (under a BROKEN #define).
In particular subtracting a defined symbol from current section
makes the value PC relative, and .org accepts symbolic expressions
as well, if the symbol is from the current section.
When tokens in macro definitions need cstr_buf inside get_tok_str,
the second might overwrite the first (happens when tokens are
multi-character non-identifiers, see testcase) in macro_is_equal,
failing to diagnose a difference. Use a real local buffer.
Now we can express prefixes with 0x0fxx opcodes we can correct the
movq mem64->xmm opcode, and restrict the movq xmm->mem64 movq to
not invalidly accept mmx.
In particular those that are extensions of existing mmx (or sse1)
instructions by a simple 0x66 prefix. There's one caveat for
x86-64: as we don't yet correctly handle the 0xf3 prefix
the movq mem64->xmm is wrong (tested in asmtest.S). Needs
some refactoring of the instr_type member.
- generate and use SYM@PLT for plt addresses
- get rid of patch_dynsym_undef hack (no idea what it did on FreeBSD)
- use sym_attrs instead of symtab_to_dynsym
- special case for function pointers into .so on i386
- libtcc_test: test tcc_add_symbol with data object
- move target specicic code to *-link.c files
- add R_XXX_RELATIVE (needed for PE)
