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fixed VT_LLOCAL dereferencing

tcc-xref
bellard 2002-01-05 00:40:47 +00:00
parent 4124f1a1c1
commit 9eab1030f7
1 changed files with 25 additions and 11 deletions
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36
tcc.c
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@ -29,6 +29,7 @@
#include <sys/mman.h>
#include <elf.h>
#include <stab.h>
#include <malloc.h>
#ifndef CONFIG_TCC_STATIC
#include <dlfcn.h>
#endif
@ -218,8 +219,8 @@ int tcc_ext = 1;
#define VT_JMPI 0x00f5 /* value is the consequence of jmp false (odd) */
#define VT_LVAL 0x0100 /* var is an lvalue */
#define VT_FORWARD 0x0200 /* value is forward reference */
#define VT_MUSTCAST 0x0400 /* value must be casted to be correct (user for
bool/char/short stored in int registers) */
#define VT_MUSTCAST 0x0400 /* value must be casted to be correct (used for
char/short stored in integer registers) */
/* types */
#define VT_STRUCT_SHIFT 16 /* structure/enum name shift (16 bits left) */
@ -2329,6 +2330,15 @@ void move_reg(int r, int s)
}
}
/* get address of vtop (vtop MUST BE an lvalue) */
void gaddrof(void)
{
vtop->r &= ~VT_LVAL;
/* tricky: if saved lvalue, then we can go back to lvalue */
if ((vtop->r & VT_VALMASK) == VT_LLOCAL)
vtop->r = (vtop->r & ~VT_VALMASK) | VT_LOCAL | VT_LVAL;
}
/* store vtop a register belonging to class 'rc'. lvalues are
converted to values. Cannot be used if cannot be converted to
register value (such as structures). */
@ -2396,7 +2406,7 @@ int gv(int rc)
vtop[-1].r = r; /* save register value */
/* increment pointer to get second word */
vtop->t = VT_INT;
vtop->r &= ~VT_LVAL;
gaddrof();
vpushi(4);
gen_op('+');
vtop->r |= VT_LVAL;
@ -3457,12 +3467,12 @@ void vstore(void)
gfunc_param(&gf);
/* source */
vtop->t = VT_INT;
vtop->r &= ~VT_LVAL;
gaddrof();
gfunc_param(&gf);
/* destination */
vswap();
vtop->t = VT_INT;
vtop->r &= ~VT_LVAL;
gaddrof();
gfunc_param(&gf);
save_regs();
@ -3513,7 +3523,7 @@ void vstore(void)
vswap();
/* convert to int to increment easily */
vtop->t = VT_INT;
vtop->r &= ~VT_LVAL;
gaddrof();
vpushi(4);
gen_op('+');
vtop->r |= VT_LVAL;
@ -4151,7 +4161,7 @@ void unary(void)
if ((vtop->t & VT_BTYPE) != VT_FUNC)
test_lvalue();
vtop->t = mk_pointer(vtop->t);
vtop->r &= ~VT_LVAL;
gaddrof();
} else
if (t == '!') {
unary();
@ -4227,7 +4237,7 @@ void unary(void)
if (tok == TOK_ARROW)
indir();
test_lvalue();
vtop->r &= ~VT_LVAL;
gaddrof();
next();
/* expect pointer on structure */
if ((vtop->t & VT_BTYPE) != VT_STRUCT)
@ -5660,6 +5670,10 @@ static void put_stabd(int type, int other, int desc)
}
/* output an ELF file (currently, only for testing) */
/* XXX: better program header generation */
/* XXX: handle realloc'ed sections (instead of mmaping them) */
/* XXX: generate dynamic reloc info + DLL tables */
/* XXX: generate startup code */
void build_exe(char *filename)
{
Elf32_Ehdr ehdr;
@ -5866,7 +5880,7 @@ static void rt_printline(unsigned long wanted_pc)
sym++;
}
/* did not find line number info: */
fprintf(stderr, "(no debug info, pc=0x%08lx) ", wanted_pc);
fprintf(stderr, "(no debug info, pc=0x%08lx): ", wanted_pc);
return;
found:
for(i = 0; i < incl_index - 1; i++)
@ -5919,7 +5933,7 @@ static void sig_error(int signum, siginfo_t *siginf, void *puc)
fprintf(stderr, "abort() called\n");
break;
default:
fprintf(stderr, "signal %d\n", signum);
fprintf(stderr, "caught signal %d\n", signum);
break;
}
exit(255);
@ -5976,7 +5990,7 @@ void help(void)
"-Dsym[=val] : define 'sym' with value 'val'\n"
"-Usym : undefine 'sym'\n"
"-llib : link with dynamic library 'lib'\n"
"-g : generate debug info\n"
"-g : generate runtime debug info\n"
"-b : compile with built-in memory and bounds checker (implies -g)\n"
"-i infile : compile infile\n"
);