From d09f8a08bdd9477bd463a2de03397ff56b5ce75d Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Wed, 13 Jul 2016 23:11:55 +0200
Subject: Add delta wrt. function in stack dump

---
 src/kernel/core/kmain.c  | 20 ++++++++++++++------
 src/kernel/core/loader.s |  1 +
 src/kernel/core/sys.c    |  7 +++++--
 src/kernel/core/worker.c |  2 +-
 4 files changed, 21 insertions(+), 9 deletions(-)

(limited to 'src/kernel/core')

diff --git a/src/kernel/core/kmain.c b/src/kernel/core/kmain.c
index 99ad0d7..38336a9 100644
--- a/src/kernel/core/kmain.c
+++ b/src/kernel/core/kmain.c
@@ -125,6 +125,20 @@ void kmain(multiboot_info_t *mbd, int32_t mb_magic) {
 	setup_syscall_table();
 	dbg_printf("System calls setup ok.\n");
 
+	// If we have a kernel map, load it now
+	for (unsigned i = 0; i < mbd->mods_count; i++) {
+		char* modname = (char*)mods[i].string;
+		size_t len = mods[i].mod_end - mods[i].mod_start;
+
+		if (strlen(modname) > 4 && strcmp(modname + strlen(modname) - 4, ".map") == 0) {
+			// Copy data to somewhere safe, as it will be modified
+			void* dup_data = malloc(len + 1);
+			memcpy(dup_data, (void*)mods[i].mod_start, len);
+
+			load_kernel_symbol_map((char*)dup_data, len);
+		}
+	}
+
 	// enter multi-threading mode
 	// interrupts are enabled at this moment, so all
 	// code run from now on should be preemtible (ie thread-safe)
@@ -249,12 +263,6 @@ fs_t *setup_iofs(multiboot_info_t *mbd) {
 		ASSERT(nullfs_add_ram_file(iofs, name,
 					(char*)mods[i].mod_start,
 					len, FM_READ | FM_MMAP));
-
-		if (strlen(modname) > 4 && strcmp(modname + strlen(modname) - 4, ".map") == 0) {
-			// remark: load_kernel_symbol_map modifies the data region,
-			// which is not a problem because nullfs_add_ram_file copied the thing already
-			load_kernel_symbol_map((char*)mods[i].mod_start, len);
-		}
 	}
 
 	return iofs;
diff --git a/src/kernel/core/loader.s b/src/kernel/core/loader.s
index 447d82d..6f14be6 100644
--- a/src/kernel/core/loader.s
+++ b/src/kernel/core/loader.s
@@ -2,6 +2,7 @@
 [GLOBAL loader]           ; making entry point visible to linker
 [GLOBAL kernel_pd]   	  ; make kernel page directory visible
 [GLOBAL kernel_stack_protector] 		; used to detect kernel stack overflow
+[GLOBAL kernel_stack_bottom] 			; usefull for debugging
 [GLOBAL kernel_stack_top] 				; stack re-used by scheduler
 
 ; higher-half kernel setup
diff --git a/src/kernel/core/sys.c b/src/kernel/core/sys.c
index 333cb58..02b66e5 100644
--- a/src/kernel/core/sys.c
+++ b/src/kernel/core/sys.c
@@ -73,9 +73,12 @@ void kernel_stacktrace(uint32_t ebp, uint32_t eip) {
 	int i = 0;
 	while (ebp >= K_HIGHHALF_ADDR) {
 		char* sym = 0;
-		if (kernel_symbol_map != 0) sym = btree_lower(kernel_symbol_map, (void*)eip);
+		void* fn_ptr = 0;
+		if (kernel_symbol_map != 0) {
+			sym = btree_lower(kernel_symbol_map, (void*)eip, &fn_ptr);
+		}
 
-		dbg_printf("| 0x%p	EIP: 0x%p  %s\n", ebp, eip, sym);
+		dbg_printf("| 0x%p	EIP: 0x%p  %s  +0x%p\n", ebp, eip, sym, ((void*)eip - fn_ptr));
 
 		uint32_t *d = (uint32_t*)ebp;
 		ebp = d[0];
diff --git a/src/kernel/core/worker.c b/src/kernel/core/worker.c
index 6852329..9b50949 100644
--- a/src/kernel/core/worker.c
+++ b/src/kernel/core/worker.c
@@ -50,7 +50,7 @@ void worker_thread(void* x) {
 	while (true) {
 		mutex_lock(&tasks_mutex);
 
-		worker_task_t *next_task = btree_upper(tasks, &zero64);
+		worker_task_t *next_task = btree_upper(tasks, &zero64, 0);
 		next_task_time = (next_task == 0 ? UINT64_MAX : next_task->time);
 
 		if (next_task != 0 && next_task->time <= time) {
-- 
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