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xregs_sig: Add a ability to handle multiple register banks
While here replace the .global directive by traditionally used .globl. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D40410
This commit is contained in:
Dmitry Chagin
parent
086e0149ae
commit
0be13a45f7
@ -5,9 +5,11 @@
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* $FreeBSD$
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*/
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.global cpu_to_xregs
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.type cpu_to_xregs, @function
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cpu_to_xregs:
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.text
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.globl cpu_to_vfp
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.type cpu_to_vfp, @function
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cpu_to_vfp:
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stp q0, q1, [x0, #( 0 * 16)]
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stp q2, q3, [x0, #( 2 * 16)]
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stp q4, q5, [x0, #( 4 * 16)]
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@ -26,12 +28,12 @@ cpu_to_xregs:
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stp q30, q31, [x0, #(30 * 16)]
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ret
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.size cpu_to_xregs, . - cpu_to_xregs
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.size cpu_to_vfp, . - cpu_to_vfp
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.global xregs_to_cpu
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.type xregs_to_cpu, @function
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xregs_to_cpu:
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.globl vfp_to_cpu
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.type vfp_to_cpu, @function
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vfp_to_cpu:
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ldp q0, q1, [x0, #( 0 * 16)]
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ldp q2, q3, [x0, #( 2 * 16)]
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ldp q4, q5, [x0, #( 4 * 16)]
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@ -50,6 +52,6 @@ xregs_to_cpu:
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ldp q30, q31, [x0, #(30 * 16)]
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ret
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.size xregs_to_cpu, . - xregs_to_cpu
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.size vfp_to_cpu, . - vfp_to_cpu
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.section .note.GNU-stack,"",@progbits
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@ -5,9 +5,11 @@
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* $FreeBSD$
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*/
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.global cpu_to_xregs
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.type cpu_to_xregs, @function
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cpu_to_xregs:
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.text
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.globl cpu_to_xmm
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.type cpu_to_xmm, @function
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cpu_to_xmm:
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movdqu %xmm0, (%rdi)
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movdqu %xmm1, 1 * 16(%rdi)
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movdqu %xmm2, 2 * 16(%rdi)
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@ -26,12 +28,12 @@ cpu_to_xregs:
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movdqu %xmm15, 15 * 16(%rdi)
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retq
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.size cpu_to_xregs, . - cpu_to_xregs
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.size cpu_to_xmm, . - cpu_to_xmm
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.global xregs_to_cpu
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.type xregs_to_cpu, @function
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xregs_to_cpu:
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.globl xmm_to_cpu
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.type xmm_to_cpu, @function
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xmm_to_cpu:
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movdqu (%rdi), %xmm0
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movdqu 1 * 16(%rdi), %xmm1
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movdqu 2 * 16(%rdi), %xmm2
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@ -50,6 +52,6 @@ xregs_to_cpu:
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movdqu 15 * 16(%rdi), %xmm15
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retq
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.size xregs_to_cpu, . - xregs_to_cpu
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.size xmm_to_cpu, . - xmm_to_cpu
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.section .note.GNU-stack,"",@progbits
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@ -44,30 +44,49 @@
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#ifndef __unused
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#define __unused __attribute__((__unused__))
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#endif
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#ifndef nitems
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#define nitems(x) (sizeof((x)) / sizeof((x)[0]))
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#endif
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struct xregs_bank {
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const char *b_name;
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const char *r_name;
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uint32_t regs;
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uint32_t bytes;
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void (*x2c)(uint8_t *);
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void (*c2x)(uint8_t *);
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};
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#if defined(__amd64__)
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#define XREGSRNAM "xmm"
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#define NREGS 16
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void cpu_to_xmm(uint8_t *);
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void xmm_to_cpu(uint8_t *);
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static const struct xregs_bank xregs_banks[] = {
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{
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.b_name = "SSE",
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.r_name = "xmm",
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.regs = 16,
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.bytes = 16,
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.x2c = xmm_to_cpu,
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.c2x = cpu_to_xmm,
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},
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};
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#elif defined(__aarch64__)
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#define XREGSRNAM "q"
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#define NREGS 32
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void cpu_to_vfp(uint8_t *);
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void vfp_to_cpu(uint8_t *);
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static const struct xregs_bank xregs_banks[] = {
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{
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.b_name = "VFP",
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.r_name = "q",
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.regs = 32,
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.bytes = 16,
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.x2c = vfp_to_cpu,
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.c2x = cpu_to_vfp,
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},
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};
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#endif
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struct xregsreg {
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uint8_t xregs_bytes[16];
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};
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struct xregs {
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struct xregsreg xregsreg[NREGS];
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};
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void cpu_to_xregs(struct xregs *xregs);
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void xregs_to_cpu(struct xregs *xregs);
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static atomic_uint sigs;
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static int max_bank_idx;
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static void
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sigusr1_handler(int sig __unused, siginfo_t *si __unused, void *m __unused)
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@ -87,23 +106,22 @@ sigalrm_handler(int sig __unused)
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alarm(TIMO);
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}
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static struct xregs zero_xregs = {};
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static void
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fill_xregs(struct xregs *xregs)
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fill_xregs(uint8_t *xregs, int bank)
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{
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arc4random_buf(xregs, sizeof(*xregs));
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arc4random_buf(xregs, xregs_banks[bank].regs * xregs_banks[bank].bytes);
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}
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static void
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dump_xregs(const struct xregsreg *r)
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dump_xregs(const uint8_t *r, int bank)
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{
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unsigned k;
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for (k = 0; k < nitems(r->xregs_bytes); k++) {
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for (k = 0; k < xregs_banks[bank].bytes; k++) {
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if (k != 0)
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printf(" ");
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printf("%02x", r->xregs_bytes[k]);
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printf("%02x", r[k]);
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}
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printf("\n");
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}
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@ -111,9 +129,9 @@ dump_xregs(const struct xregsreg *r)
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static pthread_mutex_t show_lock;
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static void
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show_diff(const struct xregs *xregs1, const struct xregs *xregs2)
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show_diff(const uint8_t *xregs1, const uint8_t *xregs2, int bank)
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{
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const struct xregsreg *r1, *r2;
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const uint8_t *r1, *r2;
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unsigned i, j;
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#if defined(__FreeBSD__)
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@ -121,14 +139,14 @@ show_diff(const struct xregs *xregs1, const struct xregs *xregs2)
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#elif defined(__linux__)
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printf("thr %ld\n", syscall(SYS_gettid));
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#endif
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for (i = 0; i < nitems(xregs1->xregsreg); i++) {
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r1 = &xregs1->xregsreg[i];
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r2 = &xregs2->xregsreg[i];
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for (j = 0; j < nitems(r1->xregs_bytes); j++) {
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if (r1->xregs_bytes[j] != r2->xregs_bytes[j]) {
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printf("%%%s%u\n", XREGSRNAM, i);
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dump_xregs(r1);
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dump_xregs(r2);
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for (i = 0; i < xregs_banks[bank].regs; i++) {
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r1 = xregs1 + i * xregs_banks[bank].bytes;
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r2 = xregs2 + i * xregs_banks[bank].bytes;
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for (j = 0; j < xregs_banks[bank].bytes; j++) {
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if (r1[j] != r2[j]) {
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printf("%%%s%u\n", xregs_banks[bank].r_name, i);
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dump_xregs(r1, bank);
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dump_xregs(r2, bank);
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break;
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}
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}
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@ -142,28 +160,32 @@ my_pause(void)
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}
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static void *
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worker_thread(void *arg __unused)
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worker_thread(void *arg)
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{
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struct xregs xregs, xregs_cpu;
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int bank = (uintptr_t)arg;
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int sz = xregs_banks[bank].regs * xregs_banks[bank].bytes;
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uint8_t xregs[sz], xregs_cpu[sz], zero_xregs[sz];
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fill_xregs(&xregs);
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memset(zero_xregs, 0, sz);
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fill_xregs(xregs, bank);
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for (;;) {
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xregs_to_cpu(&xregs);
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xregs_banks[bank].x2c(xregs);
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my_pause();
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cpu_to_xregs(&xregs_cpu);
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if (memcmp(&xregs, &xregs_cpu, sizeof(struct xregs)) != 0) {
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xregs_banks[bank].c2x(xregs_cpu);
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if (memcmp(xregs, xregs_cpu, sz) != 0) {
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pthread_mutex_lock(&show_lock);
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show_diff(&xregs, &xregs_cpu);
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show_diff(xregs, xregs_cpu, bank);
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abort();
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pthread_mutex_unlock(&show_lock);
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}
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xregs_to_cpu(&zero_xregs);
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xregs_banks[bank].x2c(zero_xregs);
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my_pause();
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cpu_to_xregs(&xregs_cpu);
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if (memcmp(&zero_xregs, &xregs_cpu, sizeof(struct xregs)) != 0) {
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xregs_banks[bank].c2x(xregs_cpu);
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if (memcmp(zero_xregs, xregs_cpu, sz) != 0) {
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pthread_mutex_lock(&show_lock);
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show_diff(&zero_xregs, &xregs_cpu);
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show_diff(zero_xregs, xregs_cpu, bank);
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abort();
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pthread_mutex_unlock(&show_lock);
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}
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@ -175,7 +197,9 @@ int
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main(void)
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{
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struct sigaction sa;
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int error, i, ncpu;
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int error, i, ncpu, bank;
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max_bank_idx = 0;
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bzero(&sa, sizeof(sa));
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sa.sa_handler = sigalrm_handler;
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@ -199,14 +223,22 @@ main(void)
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}
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ncpu = sysconf(_SC_NPROCESSORS_ONLN);
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if (max_bank_idx == 0)
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ncpu *= 2;
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bank = 0;
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pthread_t wt[ncpu];
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nextbank:
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printf("Starting %d threads for registers bank %s sized [%d][%d]\n", ncpu,
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xregs_banks[bank].b_name, xregs_banks[bank].regs, xregs_banks[bank].bytes);
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for (i = 0; i < ncpu; i++) {
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error = pthread_create(&wt[i], NULL, worker_thread, NULL);
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error = pthread_create(&wt[i], NULL, worker_thread,
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(void *)(uintptr_t)bank);
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if (error != 0) {
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fprintf(stderr, "pthread_create %s\n", strerror(error));
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}
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}
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if (++bank <= max_bank_idx)
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goto nextbank;
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alarm(TIMO);
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for (;;) {
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