GH-115802: Remove no-plt for Linux targets

Author: diegorusso

Python/jit.c

@@ -316,18 +316,25 @@ patch_32(unsigned char *location, uint64_t value)
     memcpy(location, &final_value, sizeof(final_value));
 }
 
-// 32-bit relative address.
+// 32-bit absolute address, sign-extended by the instruction.
 void
-patch_32r(unsigned char *location, uint64_t value)
+patch_32s(unsigned char *location, uint64_t value)
 {
-    value -= (uintptr_t)location;
     // Check that we're not out of range of 32 signed bits:
     assert((int64_t)value >= -(1LL << 31));
     assert((int64_t)value < (1LL << 31));
-    uint32_t final_value = (uint32_t)value;
+    int32_t final_value = (int32_t)value;
     memcpy(location, &final_value, sizeof(final_value));
 }
 
+// 32-bit relative address.
+void
+patch_32r(unsigned char *location, uint64_t value)
+{
+    value -= (uintptr_t)location;
+    patch_32s(location, value);
+}
+
 // 64-bit absolute address.
 void
 patch_64(unsigned char *location, uint64_t value)

Tools/jit/_stencils.py

@@ -90,6 +90,7 @@ class HoleValue(enum.Enum):
     "R_AARCH64_MOVW_UABS_G2_NC": "patch_aarch64_16c",
     "R_AARCH64_MOVW_UABS_G3": "patch_aarch64_16d",
     # x86_64-unknown-linux-gnu:
+    "R_X86_64_32S": "patch_32s",
     "R_X86_64_64": "patch_64",
     "R_X86_64_GOTPCRELX": "patch_x86_64_32rx",
     "R_X86_64_PLT32": "patch_32r",

Tools/jit/_targets.py

@@ -594,7 +594,7 @@ def get_target(host: str) -> _COFF32 | _COFF64 | _ELF | _MachO:
         host = "aarch64-unknown-linux-gnu"
         condition = "defined(__aarch64__) && defined(__linux__)"
         # -mno-outline-atomics: Keep intrinsics from being emitted.
-        args = ["-fpic", "-mno-outline-atomics", "-fno-plt"]
+        args = ["-fpic", "-mno-outline-atomics"]
         optimizer = _optimizers.OptimizerAArch64
         target = _ELF(
             host, condition, args=args, optimizer=optimizer, frame_pointers=True
@@ -622,7 +622,7 @@ def get_target(host: str) -> _COFF32 | _COFF64 | _ELF | _MachO:
     elif re.fullmatch(r"x86_64-.*-linux-gnu", host):
         host = "x86_64-unknown-linux-gnu"
         condition = "defined(__x86_64__) && defined(__linux__)"
-        args = ["-fno-pic", "-mcmodel=medium", "-mlarge-data-threshold=0", "-fno-plt"]
+        args = ["-fno-pic", "-mcmodel=medium", "-mlarge-data-threshold=0"]
         optimizer = _optimizers.OptimizerX86
         target = _ELF(
             host, condition, args=args, optimizer=optimizer, frame_pointers=True