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DynASM: Fix global label references

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ARM64 patch contributed by Hao Sun and Nick Gasson.
This commit is contained in:
Mike Pall 2021-03-31 18:36:44 +02:00
parent d1132afb25
commit 20f556e531
4 changed files with 20 additions and 8 deletions
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7
dynasm/dasm_arm.h
View File

@ -294,7 +294,7 @@ int dasm_link(Dst_DECL, size_t *szp)
{ /* Handle globals not defined in this translation unit. */ { /* Handle globals not defined in this translation unit. */
int idx; int idx;
for (idx = 20; idx*sizeof(int) < D->lgsize; idx++) { for (idx = 10; idx*sizeof(int) < D->lgsize; idx++) {
int n = D->lglabels[idx]; int n = D->lglabels[idx];
/* Undefined label: Collapse rel chain and replace with marker (< 0). */ /* Undefined label: Collapse rel chain and replace with marker (< 0). */
while (n > 0) { int *pb = DASM_POS2PTR(D, n); n = *pb; *pb = -idx; } while (n > 0) { int *pb = DASM_POS2PTR(D, n); n = *pb; *pb = -idx; }
@ -371,7 +371,10 @@ int dasm_encode(Dst_DECL, void *buffer)
ins &= 255; while ((((char *)cp - base) & ins)) *cp++ = 0xe1a00000; ins &= 255; while ((((char *)cp - base) & ins)) *cp++ = 0xe1a00000;
break; break;
case DASM_REL_LG: case DASM_REL_LG:
CK(n >= 0, UNDEF_LG); if (n < 0) {
n = (int)((ptrdiff_t)D->globals[-n] - (ptrdiff_t)cp - 4);
goto patchrel;
}
/* fallthrough */ /* fallthrough */
case DASM_REL_PC: case DASM_REL_PC:
CK(n >= 0, UNDEF_PC); CK(n >= 0, UNDEF_PC);

7
dynasm/dasm_arm64.h
View File

@ -354,7 +354,7 @@ int dasm_link(Dst_DECL, size_t *szp)
{ /* Handle globals not defined in this translation unit. */ { /* Handle globals not defined in this translation unit. */
int idx; int idx;
for (idx = 20; idx*sizeof(int) < D->lgsize; idx++) { for (idx = 10; idx*sizeof(int) < D->lgsize; idx++) {
int n = D->lglabels[idx]; int n = D->lglabels[idx];
/* Undefined label: Collapse rel chain and replace with marker (< 0). */ /* Undefined label: Collapse rel chain and replace with marker (< 0). */
while (n > 0) { int *pb = DASM_POS2PTR(D, n); n = *pb; *pb = -idx; } while (n > 0) { int *pb = DASM_POS2PTR(D, n); n = *pb; *pb = -idx; }
@ -432,7 +432,10 @@ int dasm_encode(Dst_DECL, void *buffer)
ins &= 255; while ((((char *)cp - base) & ins)) *cp++ = 0xe1a00000; ins &= 255; while ((((char *)cp - base) & ins)) *cp++ = 0xe1a00000;
break; break;
case DASM_REL_LG: case DASM_REL_LG:
CK(n >= 0, UNDEF_LG); if (n < 0) {
n = (int)((ptrdiff_t)D->globals[-n] - (ptrdiff_t)cp + 4);
goto patchrel;
}
/* fallthrough */ /* fallthrough */
case DASM_REL_PC: case DASM_REL_PC:
CK(n >= 0, UNDEF_PC); CK(n >= 0, UNDEF_PC);

7
dynasm/dasm_mips.h
View File

@ -273,7 +273,7 @@ int dasm_link(Dst_DECL, size_t *szp)
{ /* Handle globals not defined in this translation unit. */ { /* Handle globals not defined in this translation unit. */
int idx; int idx;
for (idx = 20; idx*sizeof(int) < D->lgsize; idx++) { for (idx = 10; idx*sizeof(int) < D->lgsize; idx++) {
int n = D->lglabels[idx]; int n = D->lglabels[idx];
/* Undefined label: Collapse rel chain and replace with marker (< 0). */ /* Undefined label: Collapse rel chain and replace with marker (< 0). */
while (n > 0) { int *pb = DASM_POS2PTR(D, n); n = *pb; *pb = -idx; } while (n > 0) { int *pb = DASM_POS2PTR(D, n); n = *pb; *pb = -idx; }
@ -349,7 +349,10 @@ int dasm_encode(Dst_DECL, void *buffer)
ins &= 255; while ((((char *)cp - base) & ins)) *cp++ = 0x60000000; ins &= 255; while ((((char *)cp - base) & ins)) *cp++ = 0x60000000;
break; break;
case DASM_REL_LG: case DASM_REL_LG:
CK(n >= 0, UNDEF_LG); if (n < 0) {
n = (int)((ptrdiff_t)D->globals[-n] - (ptrdiff_t)cp);
goto patchrel;
}
/* fallthrough */ /* fallthrough */
case DASM_REL_PC: case DASM_REL_PC:
CK(n >= 0, UNDEF_PC); CK(n >= 0, UNDEF_PC);

7
dynasm/dasm_ppc.h
View File

@ -277,7 +277,7 @@ int dasm_link(Dst_DECL, size_t *szp)
{ /* Handle globals not defined in this translation unit. */ { /* Handle globals not defined in this translation unit. */
int idx; int idx;
for (idx = 20; idx*sizeof(int) < D->lgsize; idx++) { for (idx = 10; idx*sizeof(int) < D->lgsize; idx++) {
int n = D->lglabels[idx]; int n = D->lglabels[idx];
/* Undefined label: Collapse rel chain and replace with marker (< 0). */ /* Undefined label: Collapse rel chain and replace with marker (< 0). */
while (n > 0) { int *pb = DASM_POS2PTR(D, n); n = *pb; *pb = -idx; } while (n > 0) { int *pb = DASM_POS2PTR(D, n); n = *pb; *pb = -idx; }
@ -353,7 +353,10 @@ int dasm_encode(Dst_DECL, void *buffer)
ins &= 255; while ((((char *)cp - base) & ins)) *cp++ = 0x60000000; ins &= 255; while ((((char *)cp - base) & ins)) *cp++ = 0x60000000;
break; break;
case DASM_REL_LG: case DASM_REL_LG:
CK(n >= 0, UNDEF_LG); if (n < 0) {
n = (int)((ptrdiff_t)D->globals[-n] - (ptrdiff_t)cp);
goto patchrel;
}
/* fallthrough */ /* fallthrough */
case DASM_REL_PC: case DASM_REL_PC:
CK(n >= 0, UNDEF_PC); CK(n >= 0, UNDEF_PC);