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/* plt-findfre-2.c -- Test for sframe_find_fre for SFrame FDE of type
PCMASK with with one SFrame FRE only.
Copyright (C) 2025 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "sframe-api.h"
/* DejaGnu should not use gnulib's vsnprintf replacement here. */
#undef vsnprintf
#include <dejagnu.h>
/* s390x-specific size in bytes of plt0 and pltN. */
#define PLT_SIZE 32
/* Magic values added to CFA offsets to make them distingishable. Must
be multiple of 8 due to s390x-specific CFA alignment factor. */
#define PLT0_CFA_OFFSET_MAGIC 0
#define PLTN_CFA_OFFSET_MAGIC 8
static int
add_plt0_fde (sframe_encoder_ctx *ectx, uint32_t plt_vaddr,
uint32_t sframe_vaddr, int idx)
{
/* 1 single FRE. */
sframe_frame_row_entry fre
= { 0x0,
{ SFRAME_V2_S390X_CFA_OFFSET_ENCODE (160 + PLT0_CFA_OFFSET_MAGIC) },
SFRAME_V1_FRE_INFO (SFRAME_BASE_REG_SP, 1, SFRAME_FRE_OFFSET_1B) };
unsigned char finfo = sframe_fde_create_func_info (SFRAME_FRE_TYPE_ADDR1,
SFRAME_FDE_TYPE_PCINC);
uint32_t offsetof_fde_in_sec
= sframe_encoder_get_offsetof_fde_start_addr (ectx, idx, NULL);
int32_t func_start_addr = (plt_vaddr
- (sframe_vaddr + offsetof_fde_in_sec));
/* 1 PCINC-type FDE for 1 plt0 entry of 32 bytes. */
int err = sframe_encoder_add_funcdesc_v2 (ectx, func_start_addr,
PLT_SIZE /* func size. */,
finfo,
0 /* rep block size. */,
1 /* num FREs. */);
if (err == -1)
return err;
if (sframe_encoder_add_fre (ectx, idx, &fre) == SFRAME_ERR)
return -1;
return 0;
}
static int
add_pltn_fde (sframe_encoder_ctx *ectx, uint32_t plt_vaddr,
uint32_t sframe_vaddr, int idx)
{
/* 1 single FRE. */
sframe_frame_row_entry fre
= { 0x0,
{ SFRAME_V2_S390X_CFA_OFFSET_ENCODE (160 + PLTN_CFA_OFFSET_MAGIC) },
SFRAME_V1_FRE_INFO (SFRAME_BASE_REG_SP, 1, SFRAME_FRE_OFFSET_1B) };
unsigned char finfo = sframe_fde_create_func_info (SFRAME_FRE_TYPE_ADDR1,
SFRAME_FDE_TYPE_PCMASK);
uint32_t offsetof_fde_in_sec
= sframe_encoder_get_offsetof_fde_start_addr (ectx, idx, NULL);
int32_t func_start_addr = (plt_vaddr
- (sframe_vaddr + offsetof_fde_in_sec));
/* 1 PCMASK-type FDE for 5 pltN entries of 32 bytes each. */
int err = sframe_encoder_add_funcdesc_v2 (ectx, func_start_addr,
5 * PLT_SIZE /* func size. */,
finfo,
PLT_SIZE /* rep block size. */,
1 /* num FREs. */);
if (err == -1)
return err;
if (sframe_encoder_add_fre (ectx, idx, &fre) == SFRAME_ERR)
return -1;
return 0;
}
static
void test_plt_findfre (const char suffix, const uint32_t plt_vaddr,
const uint32_t sframe_vaddr)
{
sframe_encoder_ctx *ectx;
sframe_decoder_ctx *dctx;
sframe_frame_row_entry frep;
char *sframe_buf;
size_t sf_size;
int err = 0;
unsigned int fde_cnt = 0;
int i;
#define TEST(cond, ...) \
do \
{ \
if (cond) \
pass (__VA_ARGS__); \
else \
fail (__VA_ARGS__); \
} \
while (0)
ectx = sframe_encode (SFRAME_VERSION, SFRAME_F_FDE_FUNC_START_PCREL,
SFRAME_ABI_S390X_ENDIAN_BIG,
SFRAME_CFA_FIXED_FP_INVALID,
SFRAME_CFA_FIXED_RA_INVALID,
&err);
TEST (ectx != NULL && err == 0, "plt-findfre-2%c: Creating SFrame encoder", suffix);
err = add_plt0_fde (ectx, plt_vaddr, sframe_vaddr, 0);
TEST (err == 0, "plt-findfre-2%c: Adding FDE for plt0", suffix);
fde_cnt = sframe_encoder_get_num_fidx (ectx);
TEST (fde_cnt == 1, "plt-findfre-2%c: Test FDE count after adding FDE for plt0", suffix);
err = add_pltn_fde (ectx, plt_vaddr + PLT_SIZE, sframe_vaddr, 1);
TEST (err == 0, "plt-findfre-2%c: Adding FDE for pltN", suffix);
fde_cnt = sframe_encoder_get_num_fidx (ectx);
TEST (fde_cnt == 2, "plt-findfre-2%c: Test FDE count after adding FDE for pltN", suffix);
sframe_buf = sframe_encoder_write (ectx, &sf_size, &err);
TEST (err == 0, "plt-findfre-2%c: Encoder write", suffix);
dctx = sframe_decode (sframe_buf, sf_size, &err);
TEST (dctx != NULL, "plt-findfre-2%c: Decoder setup", suffix);
/* Find the only FRE in PLT0 at offset 0. */
err = sframe_find_fre (dctx, (plt_vaddr + 0 - sframe_vaddr), &frep);
TEST (err == 0 && sframe_fre_get_cfa_offset (dctx, &frep, &err) == 160 + PLT0_CFA_OFFSET_MAGIC,
"plt-findfre-2%c: Find only FRE in PLT0 at offset 0", suffix);
/* Find the only FRE in PLT0 at offset PLT_SIZE-1. */
err = sframe_find_fre (dctx, (plt_vaddr + (PLT_SIZE-1) - sframe_vaddr), &frep);
TEST (err == 0 && sframe_fre_get_cfa_offset (dctx, &frep, &err) == 160 + PLT0_CFA_OFFSET_MAGIC,
"plt-findfre-2%c: Find only FRE in PLT0 at offset PLT_SIZE-1", suffix);
/* Find the only FRE in PLT1-5 at offset 0 and PLT_SIZE-1. */
for (i = 1; i < 5; i++)
{
/* Find the only FRE in PLTN at offset 0. */
err = sframe_find_fre (dctx, (plt_vaddr + i * PLT_SIZE + 0 - sframe_vaddr), &frep);
TEST (err == 0 && sframe_fre_get_cfa_offset (dctx, &frep, &err) == 160 + PLTN_CFA_OFFSET_MAGIC,
"plt-findfre-2%c: Find only FRE in PLT%d at offset 0", suffix, i);
/* Find the only FRE in PLTN at offset 31. */
err = sframe_find_fre (dctx, (plt_vaddr + i * PLT_SIZE + (PLT_SIZE-1) - sframe_vaddr), &frep);
TEST (err == 0 && sframe_fre_get_cfa_offset (dctx, &frep, &err) == 160 + PLTN_CFA_OFFSET_MAGIC,
"plt-findfre-2%c: Find only FRE in PLT%d at offset PLT_SIZE-1", suffix, i);
}
/* Find no FRE in non-existing PLT6 at offset 0. */
err = sframe_find_fre (dctx, (plt_vaddr + 6 * PLT_SIZE + 0 - sframe_vaddr), &frep);
TEST (err != 0, "plt-findfre-2%c: Find no FRE in out of range PLT6 at offset 0", suffix);
sframe_encoder_free (&ectx);
sframe_decoder_free (&dctx);
}
int
main (void)
{
uint32_t sframe_vaddr = 0x402220;
uint32_t plt_vaddr = 0x401020;
printf ("plt-findfre-2a: Testing with plt_vaddr = %#x; sframe_vaddr = %#x\n",
plt_vaddr, sframe_vaddr);
test_plt_findfre ('a', plt_vaddr, sframe_vaddr);
sframe_vaddr = 0x401020;
plt_vaddr = 0x402220;
printf ("plt-findfre-2b: Testing with plt_vaddr = %#x; sframe_vaddr = %#x\n",
plt_vaddr, sframe_vaddr);
test_plt_findfre ('b', plt_vaddr, sframe_vaddr);
return 0;
}
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