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Fix runtime error: signed integer overflow: 2147483647 + 128 cannot be represented in type 'int'

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Dmitry Stogov 2023-12-26 17:34:30 +03:00
parent 6ed346ae01
commit ee6d4bd147
1 changed files with 6 additions and 6 deletions
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12
dynasm/dasm_x86.h
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@ -193,12 +193,12 @@ void dasm_put(Dst_DECL, int start, ...)
case DASM_DISP: case DASM_DISP:
if (n == 0) { if (mrm < 0) mrm = p[-2]; if ((mrm&7) != 5) break; } if (n == 0) { if (mrm < 0) mrm = p[-2]; if ((mrm&7) != 5) break; }
/* fallthrough */ /* fallthrough */
case DASM_IMM_DB: if (((n+128)&-256) == 0) goto ob; /* fallthrough */ case DASM_IMM_DB: if ((((unsigned)n+128)&-256) == 0) goto ob; /* fallthrough */
case DASM_REL_A: /* Assumes ptrdiff_t is int. !x64 */ case DASM_REL_A: /* Assumes ptrdiff_t is int. !x64 */
case DASM_IMM_D: ofs += 4; break; case DASM_IMM_D: ofs += 4; break;
case DASM_IMM_S: CK(((n+128)&-256) == 0, RANGE_I); goto ob; case DASM_IMM_S: CK((((unsigned)n+128)&-256) == 0, RANGE_I); goto ob;
case DASM_IMM_B: CK((n&-256) == 0, RANGE_I); ob: ofs++; break; case DASM_IMM_B: CK((n&-256) == 0, RANGE_I); ob: ofs++; break;
case DASM_IMM_WB: if (((n+128)&-256) == 0) goto ob; /* fallthrough */ case DASM_IMM_WB: if ((((unsigned)n+128)&-256) == 0) goto ob; /* fallthrough */
case DASM_IMM_W: CK((n&-65536) == 0, RANGE_I); ofs += 2; break; case DASM_IMM_W: CK((n&-65536) == 0, RANGE_I); ofs += 2; break;
case DASM_SPACE: p++; ofs += n; break; case DASM_SPACE: p++; ofs += n; break;
case DASM_SETLABEL: b[pos-2] = -0x40000000; break; /* Neg. label ofs. */ case DASM_SETLABEL: b[pos-2] = -0x40000000; break; /* Neg. label ofs. */
@ -412,16 +412,16 @@ int dasm_encode(Dst_DECL, void *buffer)
if (*p != DASM_IMM_DB && *p != DASM_IMM_WB) mark = NULL; if (*p != DASM_IMM_DB && *p != DASM_IMM_WB) mark = NULL;
if (n == 0) { int mrm = mm[-1]&7; if (mrm == 4) mrm = mm[0]&7; if (n == 0) { int mrm = mm[-1]&7; if (mrm == 4) mrm = mm[0]&7;
if (mrm != 5) { mm[-1] -= 0x80; break; } } if (mrm != 5) { mm[-1] -= 0x80; break; } }
if (((n+128) & -256) != 0) goto wd; else mm[-1] -= 0x40; if ((((unsigned)n+128) & -256) != 0) goto wd; else mm[-1] -= 0x40;
} }
/* fallthrough */ /* fallthrough */
case DASM_IMM_S: case DASM_IMM_B: wb: dasmb(n); break; case DASM_IMM_S: case DASM_IMM_B: wb: dasmb(n); break;
case DASM_IMM_DB: if (((n+128)&-256) == 0) { case DASM_IMM_DB: if ((((unsigned)n+128)&-256) == 0) {
db: if (!mark) mark = cp; mark[-2] += 2; mark = NULL; goto wb; db: if (!mark) mark = cp; mark[-2] += 2; mark = NULL; goto wb;
} else mark = NULL; } else mark = NULL;
/* fallthrough */ /* fallthrough */
case DASM_IMM_D: wd: dasmd(n); break; case DASM_IMM_D: wd: dasmd(n); break;
case DASM_IMM_WB: if (((n+128)&-256) == 0) goto db; else mark = NULL; case DASM_IMM_WB: if ((((unsigned)n+128)&-256) == 0) goto db; else mark = NULL;
/* fallthrough */ /* fallthrough */
case DASM_IMM_W: dasmw(n); break; case DASM_IMM_W: dasmw(n); break;
case DASM_VREG: { case DASM_VREG: {