OSO/TinyCC
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fix for: x86_64-tcc compiled by i386-tcc is wrong

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A test program (must be compiled by the above version of the tcc):

    /* Tickle a bug in TinyC on 64-bit systems:
     * the LSB of the top word or ARGP gets set
     * for no obvious reason.
     *
     * Source: a legacy language interpreter which
     * has a little stack / stack pointer for arguments.
     *
     * Output is: 0x8049620 0x10804961c
     * Should be: 0x8049620 0x804961c
     */
    #include <stdio.h>
    #define NARGS 20000
    int ARG[NARGS];
    int *ARGSPACE = ARG;
    int *ARGP = ARG - 1;
    main() { printf("%p %p\n", ARGSPACE, ARGP); }
This commit is contained in:
seyko
2015-03-23 19:24:55 +03:00
parent 8dbe129ab7
commit 8f6390061d
3 changed files with 4 additions and 4 deletions
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2
libtcc.c
View File

@ -540,7 +540,7 @@ ST_FUNC void put_extern_sym(Sym *sym, Section *section,
/* add a new relocation entry to symbol 'sym' in section 's' */ /* add a new relocation entry to symbol 'sym' in section 's' */
ST_FUNC void greloca(Section *s, Sym *sym, unsigned long offset, int type, ST_FUNC void greloca(Section *s, Sym *sym, unsigned long offset, int type,
unsigned long addend) addr_t addend)
{ {
int c = 0; int c = 0;
if (sym) { if (sym) {

4
tcc.h
View File

@ -1095,7 +1095,7 @@ ST_FUNC Section *find_section(TCCState *s1, const char *name);
ST_FUNC void put_extern_sym2(Sym *sym, Section *section, addr_t value, unsigned long size, int can_add_underscore); ST_FUNC void put_extern_sym2(Sym *sym, Section *section, addr_t value, unsigned long size, int can_add_underscore);
ST_FUNC void put_extern_sym(Sym *sym, Section *section, addr_t value, unsigned long size); ST_FUNC void put_extern_sym(Sym *sym, Section *section, addr_t value, unsigned long size);
ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type); ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type);
ST_FUNC void greloca(Section *s, Sym *sym, unsigned long offset, int type, unsigned long addend); ST_FUNC void greloca(Section *s, Sym *sym, unsigned long offset, int type, addr_t addend);
ST_INLN void sym_free(Sym *sym); ST_INLN void sym_free(Sym *sym);
ST_FUNC Sym *sym_push2(Sym **ps, int v, int t, long c); ST_FUNC Sym *sym_push2(Sym **ps, int v, int t, long c);
@ -1285,7 +1285,7 @@ ST_FUNC int put_elf_sym(Section *s, addr_t value, unsigned long size, int info,
ST_FUNC int add_elf_sym(Section *s, addr_t value, unsigned long size, int info, int other, int sh_num, const char *name); ST_FUNC int add_elf_sym(Section *s, addr_t value, unsigned long size, int info, int other, int sh_num, const char *name);
ST_FUNC int find_elf_sym(Section *s, const char *name); ST_FUNC int find_elf_sym(Section *s, const char *name);
ST_FUNC void put_elf_reloc(Section *symtab, Section *s, unsigned long offset, int type, int symbol); ST_FUNC void put_elf_reloc(Section *symtab, Section *s, unsigned long offset, int type, int symbol);
ST_FUNC void put_elf_reloca(Section *symtab, Section *s, unsigned long offset, int type, int symbol, unsigned long addend); ST_FUNC void put_elf_reloca(Section *symtab, Section *s, unsigned long offset, int type, int symbol, addr_t addend);
ST_FUNC void put_stabs(const char *str, int type, int other, int desc, unsigned long value); ST_FUNC void put_stabs(const char *str, int type, int other, int desc, unsigned long value);
ST_FUNC void put_stabs_r(const char *str, int type, int other, int desc, unsigned long value, Section *sec, int sym_index); ST_FUNC void put_stabs_r(const char *str, int type, int other, int desc, unsigned long value, Section *sec, int sym_index);

2
tccelf.c
View File

@ -270,7 +270,7 @@ ST_FUNC int add_elf_sym(Section *s, addr_t value, unsigned long size,
/* put relocation */ /* put relocation */
ST_FUNC void put_elf_reloca(Section *symtab, Section *s, unsigned long offset, ST_FUNC void put_elf_reloca(Section *symtab, Section *s, unsigned long offset,
int type, int symbol, unsigned long addend) int type, int symbol, addr_t addend)
{ {
char buf[256]; char buf[256];
Section *sr; Section *sr;