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Merge remote-tracking branch 'lightening/main'

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This commit is contained in:
Andy Wingo 2021-01-07 11:48:30 +01:00
commit 74e69220ea
2 changed files with 28 additions and 0 deletions
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4
libguile/lightening/lightening/x86.c
View file

@ -362,11 +362,15 @@ jit_try_shorten(jit_state_t *_jit, jit_reloc_t reloc, jit_pointer_t addr)
{
uint8_t *loc = _jit->start + reloc.offset;
uint8_t *start = loc - reloc.inst_start_offset;
uint8_t *end = _jit->pc.uc;
jit_imm_t i0 = (jit_imm_t)addr;
if (loc == start)
return;
if (start < (uint8_t*)addr && (uint8_t*)addr <= end)
return;
switch (reloc.kind)
{
case JIT_RELOC_ABSOLUTE: {

24
libguile/lightening/tests/jmp0.c Normal file
View file

@ -0,0 +1,24 @@
#include "test.h"
static void
run_test(jit_state_t *j, uint8_t *arena_base, size_t arena_size)
{
jit_begin(j, arena_base, arena_size);
size_t align = jit_enter_jit_abi(j, 0, 0, 0);
jit_load_args_1(j, jit_operand_gpr (JIT_OPERAND_ABI_WORD, JIT_R0));
jit_reloc_t r = jit_jmp(j);
jit_patch_here(j, r);
jit_leave_jit_abi(j, 0, 0, align);
jit_retr(j, JIT_R0);
jit_word_t (*f)(jit_word_t) = jit_end(j, NULL);
ASSERT(f(42) == 42);
ASSERT(f(-1) == -1);
}
int
main (int argc, char *argv[])
{
return main_helper(argc, argv, run_test);
}