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tcg: Restart TB generation after out-of-line ldst overflow

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This is part c of relocation overflow handling.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2019-04-21 14:51:00 -07:00
parent 1768987b73
commit aeee05f53a
9 changed files with 75 additions and 44 deletions
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18
tcg/tcg-ldst.inc.c
View file

@ -38,19 +38,19 @@ typedef struct TCGLabelQemuLdst {
* Generate TB finalization at the end of block
*/
static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
static bool tcg_out_ldst_finalize(TCGContext *s)
static int tcg_out_ldst_finalize(TCGContext *s)
{
TCGLabelQemuLdst *lb;
/* qemu_ld/st slow paths */
QSIMPLEQ_FOREACH(lb, &s->ldst_labels, next) {
if (lb->is_ld) {
tcg_out_qemu_ld_slow_path(s, lb);
} else {
tcg_out_qemu_st_slow_path(s, lb);
if (lb->is_ld
? !tcg_out_qemu_ld_slow_path(s, lb)
: !tcg_out_qemu_st_slow_path(s, lb)) {
return -2;
}
/* Test for (pending) buffer overflow. The assumption is that any
@ -58,10 +58,10 @@ static bool tcg_out_ldst_finalize(TCGContext *s)
the buffer completely. Thus we can test for overflow after
generating code without having to check during generation. */
if (unlikely((void *)s->code_ptr > s->code_gen_highwater)) {
return false;
return -1;
}
}
return true;
return 0;
}
/*