diff options
Diffstat (limited to 'stand/efi/loader/arch/amd64/trap.c')
| -rw-r--r-- | stand/efi/loader/arch/amd64/trap.c | 41 |
1 files changed, 37 insertions, 4 deletions
diff --git a/stand/efi/loader/arch/amd64/trap.c b/stand/efi/loader/arch/amd64/trap.c index e8cf188cf22f..95a42a18f719 100644 --- a/stand/efi/loader/arch/amd64/trap.c +++ b/stand/efi/loader/arch/amd64/trap.c @@ -1,6 +1,5 @@ /*- * Copyright (c) 2016 The FreeBSD Foundation - * All rights reserved. * * This software was developed by Konstantin Belousov under sponsorship * from the FreeBSD Foundation. @@ -27,9 +26,6 @@ * SUCH DAMAGE. */ -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - #include <stand.h> #include <string.h> #include <sys/param.h> @@ -79,11 +75,21 @@ static uint32_t loader_tss; /* Loader TSS segment */ static struct region_descriptor fw_gdt; /* Descriptor of pristine GDT */ static EFI_PHYSICAL_ADDRESS loader_gdt_pa; /* Address of loader shadow GDT */ +struct frame { + struct frame *fr_savfp; + uintptr_t fr_savpc; +}; + void report_exc(struct trapframe *tf); void report_exc(struct trapframe *tf) { + struct frame *fp; + uintptr_t pc, base; + char buf[80]; + int ret; + base = (uintptr_t)boot_img->ImageBase; /* * printf() depends on loader runtime and UEFI firmware health * to produce the console output, in case of exception, the @@ -109,6 +115,33 @@ report_exc(struct trapframe *tf) tf->tf_rdi, tf->tf_rsi, tf->tf_rdx, tf->tf_rcx, tf->tf_r8, tf->tf_r9, tf->tf_rax, tf->tf_rbx, tf->tf_rbp, tf->tf_r10, tf->tf_r11, tf->tf_r12, tf->tf_r13, tf->tf_r14, tf->tf_r15); + + fp = (struct frame *)tf->tf_rbp; + pc = tf->tf_rip; + + printf("Stack trace:\n"); + pager_open(); + while (fp != NULL || pc != 0) { + char *source = "PC"; + + if (pc >= base && pc < base + boot_img->ImageSize) { + pc -= base; + source = "loader PC"; + } + (void) snprintf(buf, sizeof (buf), "FP %016lx: %s 0x%016lx\n", + (uintptr_t)fp, source, pc); + if (pager_output(buf)) + break; + + if (fp != NULL) + fp = fp->fr_savfp; + + if (fp != NULL) + pc = fp->fr_savpc; + else + pc = 0; + } + pager_close(); printf("Machine stopped.\n"); } |